diff --git a/book/book.toml b/book/book.toml
index c7377ded6..19d6bf585 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -7,4 +7,9 @@ title = "hax"
 
 [output.html]
 mathjax-support = true
+additional-css = ["static/custom.css"]
+additional-js = ["theme/fstar.js", "theme/lz-string.js", "theme/ansi_up.js"]
 
+[output.html.playground]
+runnable = true
+editable = true
diff --git a/book/default.nix b/book/default.nix
index 98580862c..a7358b93f 100644
--- a/book/default.nix
+++ b/book/default.nix
@@ -9,7 +9,6 @@ stdenv.mkDerivation {
   buildPhase = ''
             mdbook build
             mdbook build archive -d ../book/archive
-            bash ./postprocess.sh
           '';
   installPhase = "mv book $out";
 }
diff --git a/book/postprocess.sh b/book/postprocess.sh
deleted file mode 100755
index 79d4a55ae..000000000
--- a/book/postprocess.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/env sh
-
-# This file replaces `<strong>user-checkable</strong>` with actual
-# checkboxes and adds CSS to the generated HTML.
-
-for file in $(find . -name '*.html'); do
-    sed -i 's|<strong>user-checkable</strong>|<input type="checkbox" class="user-checkable"/>|g' "$file"
-done
-
-for css in $(find . -name 'general.css'); do
-    cat >> "$css" <<-EOF
-input.user-checkable {
-    transform: scale(1.5);
-    margin-right: 8px;
-    margin-left: 8px;
-}
-
-ul:has(> li > .user-checkable) {
-    list-style-type: none;
-    padding: 0;
-    margin: 0;
-}
-li:has(> .user-checkable) {
-    list-style-type: none;
-    padding: 0;
-    margin: 0;
-}
-EOF
-done
diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 7da2c743f..e5f094882 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -1,17 +1,21 @@
 # Summary
 
 - [Introduction](./readme.md)
-- [Examples]()
 - [Quick start](quick_start/intro.md)
 - [Tutorial](tutorial/readme.md)
     - [Panic freedom](tutorial/panic-freedom.md)
     - [Properties on functions](tutorial/properties.md)
     - [Data invariants](tutorial/data-invariants.md)
+- [Examples](examples/intro.md)
+    - [Rust By Example](examples/rust-by-examples/intro.md)
+    - [Using the F* backend](examples/fstar/intro.md)
+    - [Using the Coq backend](examples/coq/intro.md)
+    - [Using the ProVerif backend](examples/coq/intro.md)
 - [Proofs]()
     - [F*]()
     - [Coq]()
     - [`libcore`]()
-- [Troubleshooting/FAQ](faq/into.md)
+- [Troubleshooting/FAQ](faq/intro.md)
     - [Command line usage]()
        - [The include flag: which items should be extracted, and how?](faq/include-flags.md)
 - [Contributing]()
diff --git a/book/src/examples/coq/intro.md b/book/src/examples/coq/intro.md
new file mode 100644
index 000000000..84914c08f
--- /dev/null
+++ b/book/src/examples/coq/intro.md
@@ -0,0 +1 @@
+# Using the ProVerif backend
diff --git a/book/src/examples/fstar/intro.md b/book/src/examples/fstar/intro.md
new file mode 100644
index 000000000..9b80bca00
--- /dev/null
+++ b/book/src/examples/fstar/intro.md
@@ -0,0 +1 @@
+# Using the F* backend
diff --git a/book/src/examples/intro.md b/book/src/examples/intro.md
new file mode 100644
index 000000000..0ff72fdfa
--- /dev/null
+++ b/book/src/examples/intro.md
@@ -0,0 +1,12 @@
+# Examples
+
+This chapter contains various examples that demonstrates how hax can
+be used to prove properties about programs. Each example is
+self-contained. hax being a tool that can extract Rust to various
+backends, this section provides examples for each backend.
+
+The first subsection takes some examples from [Rust by
+Example](https://doc.rust-lang.org/rust-by-example/), and shows how to
+prove properties on them.
+
+The other sections present backend-specific examples.
diff --git a/book/src/examples/readme.md b/book/src/examples/readme.md
deleted file mode 100644
index e69de29bb..000000000
diff --git a/book/src/examples/rust-by-examples/intro.md b/book/src/examples/rust-by-examples/intro.md
new file mode 100644
index 000000000..d8d487984
--- /dev/null
+++ b/book/src/examples/rust-by-examples/intro.md
@@ -0,0 +1 @@
+# Rust By Example
diff --git a/book/src/faq/into.md b/book/src/faq/into.md
index cefa77ebd..856d84b65 100644
--- a/book/src/faq/into.md
+++ b/book/src/faq/into.md
@@ -1,3 +1 @@
 # Troubleshooting/FAQ
-
-This chapter captures a list of common questions or issues and how to resolve them. If you happen to run into an issue that is not documented here, please consider submitting a pull request!
diff --git a/book/src/faq/intro.md b/book/src/faq/intro.md
new file mode 100644
index 000000000..cefa77ebd
--- /dev/null
+++ b/book/src/faq/intro.md
@@ -0,0 +1,3 @@
+# Troubleshooting/FAQ
+
+This chapter captures a list of common questions or issues and how to resolve them. If you happen to run into an issue that is not documented here, please consider submitting a pull request!
diff --git a/book/src/quick_start/intro.md b/book/src/quick_start/intro.md
index 15d42ba26..a5dd82a12 100644
--- a/book/src/quick_start/intro.md
+++ b/book/src/quick_start/intro.md
@@ -5,9 +5,9 @@ what you are looking for!
 
 ## Setup the tools
 
- - **user-checkable** [Install the hax toolchain](https://github.com/hacspec/hax?tab=readme-ov-file#installation).  
+ - <input type="checkbox" class="user-checkable"/> [Install the hax toolchain](https://github.com/hacspec/hax?tab=readme-ov-file#installation).  
    <span style="margin-right:30px;"></span>🪄 Running `cargo hax --version` should print some version info.
- - **user-checkable** [Install F*](https://github.com/FStarLang/FStar/blob/master/INSTALL.md) *(optional: only if want to run F\*)*
+ - <input type="checkbox" class="user-checkable"/> [Install F*](https://github.com/FStarLang/FStar/blob/master/INSTALL.md) *(optional: only if want to run F\*)*
 
 ## Setup the crate you want to verify
 
@@ -16,11 +16,11 @@ what you are looking for!
 *Note: this part is useful only if you want to run F\*.*
 
 
- - **user-checkable** Create the folder `proofs/fstar/extraction` folder, right next to the `Cargo.toml` of the crate you want to verify.  
+ - <input type="checkbox" class="user-checkable"/> Create the folder `proofs/fstar/extraction` folder, right next to the `Cargo.toml` of the crate you want to verify.  
    <span style="margin-right:30px;"></span>🪄 `mkdir -p proofs/fstar/extraction`
- - **user-checkable** Copy [this makefile](https://gist.github.com/W95Psp/4c304132a1f85c5af4e4959dd6b356c3) to `proofs/fstar/extraction/Makefile`.  
+ - <input type="checkbox" class="user-checkable"/> Copy [this makefile](https://gist.github.com/W95Psp/4c304132a1f85c5af4e4959dd6b356c3) to `proofs/fstar/extraction/Makefile`.  
    <span style="margin-right:30px;"></span>🪄 `curl -o proofs/fstar/extraction/Makefile https://gist.githubusercontent.com/W95Psp/4c304132a1f85c5af4e4959dd6b356c3/raw/Makefile`
- - **user-checkable** Add `hax-lib` as a dependency to your crate, enabled only when using hax.  
+ - <input type="checkbox" class="user-checkable"/> Add `hax-lib` as a dependency to your crate, enabled only when using hax.  
    <span style="margin-right:30px;"></span>🪄 `cargo add --target 'cfg(hax)' --git https://github.com/hacspec/hax hax-lib`  
    <span style="margin-right:30px;"></span><span style="opacity: 0;">🪄</span> *(`hax-lib` is not mandatory, but this guide assumes it is present)*
 
diff --git a/book/src/tutorial/Cargo.lock b/book/src/tutorial/Cargo.lock
deleted file mode 100644
index 9675766ca..000000000
--- a/book/src/tutorial/Cargo.lock
+++ /dev/null
@@ -1,239 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
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-
-[[package]]
-name = "dyn-clone"
-version = "1.0.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d6ef0072f8a535281e4876be788938b528e9a1d43900b82c2569af7da799125"
-
-[[package]]
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-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
-[[package]]
-name = "hax-lib"
-version = "0.1.0-pre.1"
-source = "git+https://github.com/hacspec/hax#d668de4d17e5ddee3a613068dc30b71353a9db4f"
-
-[[package]]
-name = "hax-lib-macros"
-version = "0.1.0-pre.1"
-source = "git+https://github.com/hacspec/hax#d668de4d17e5ddee3a613068dc30b71353a9db4f"
-dependencies = [
- "hax-lib-macros-types",
- "proc-macro-error",
- "proc-macro2",
- "quote",
- "syn 2.0.52",
-]
-
-[[package]]
-name = "hax-lib-macros-types"
-version = "0.1.0-pre.1"
-source = "git+https://github.com/hacspec/hax#d668de4d17e5ddee3a613068dc30b71353a9db4f"
-dependencies = [
- "proc-macro2",
- "quote",
- "schemars",
- "serde",
- "serde_json",
- "uuid",
-]
-
-[[package]]
-name = "itoa"
-version = "1.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
-
-[[package]]
-name = "libc"
-version = "0.2.153"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "proc-macro-error-attr",
- "proc-macro2",
- "quote",
- "syn 1.0.109",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error-attr"
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-dependencies = [
- "proc-macro2",
- "quote",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro2"
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-checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
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-]
-
-[[package]]
-name = "quote"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
-dependencies = [
- "proc-macro2",
-]
-
-[[package]]
-name = "ryu"
-version = "1.0.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
-
-[[package]]
-name = "schemars"
-version = "0.8.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45a28f4c49489add4ce10783f7911893516f15afe45d015608d41faca6bc4d29"
-dependencies = [
- "dyn-clone",
- "schemars_derive",
- "serde",
- "serde_json",
-]
-
-[[package]]
-name = "schemars_derive"
-version = "0.8.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c767fd6fa65d9ccf9cf026122c1b555f2ef9a4f0cea69da4d7dbc3e258d30967"
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- "quote",
- "serde_derive_internals",
- "syn 1.0.109",
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-
-[[package]]
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- "serde_derive",
-]
-
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- "proc-macro2",
- "quote",
- "unicode-ident",
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-name = "tutorial-src"
-version = "0.1.0"
-dependencies = [
- "hax-lib",
- "hax-lib-macros",
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-
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-dependencies = [
- "getrandom",
-]
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-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
-[[package]]
-name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/book/src/tutorial/Cargo.toml b/book/src/tutorial/Cargo.toml
deleted file mode 100644
index de5569b89..000000000
--- a/book/src/tutorial/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]
-name = "tutorial-src"
-version = "0.1.0"
-edition = "2021"
-
-[lib]
-path = "sources.rs"
-
-[dependencies]
-hax-lib = { git = "https://github.com/hacspec/hax", version = "0.1.0-pre.1" }
diff --git a/book/src/tutorial/Sources.fst b/book/src/tutorial/Sources.fst
deleted file mode 100644
index cedf378a5..000000000
--- a/book/src/tutorial/Sources.fst
+++ /dev/null
@@ -1,110 +0,0 @@
-module Tutorial_src
-#set-options "--fuel 0 --ifuel 1 --z3rlimit 150"
-open Core
-open FStar.Mul
-
-// ANCHOR: F3
-type t_F3 =
-  | F3_E1 : t_F3
-  | F3_E2 : t_F3
-  | F3_E3 : t_F3
-
-let t_F3_cast_to_repr (x: t_F3) : isize =
-  match x with
-  | F3_E1  -> isz 0
-  | F3_E2  -> isz 1
-  | F3_E3  -> isz 3
-// ANCHOR_END: F3
-
-// ANCHOR: barrett
-unfold
-let t_FieldElement = i32
-
-let v_BARRETT_MULTIPLIER: i64 = 20159L
-
-let v_BARRETT_R: i64 = 67108864L
-
-let v_BARRETT_SHIFT: i64 = 26L
-
-let v_FIELD_MODULUS: i32 = 3329l
-
-let barrett_reduce (value: i32)
-    : Pure i32
-      (requires
-        (Core.Convert.f_from value <: i64) >=. (Core.Ops.Arith.Neg.neg v_BARRETT_R <: i64) &&
-        (Core.Convert.f_from value <: i64) <=. v_BARRETT_R)
-      (ensures
-        fun result ->
-          let result:i32 = result in
-          result >. (Core.Ops.Arith.Neg.neg v_FIELD_MODULUS <: i32) && result <. v_FIELD_MODULUS &&
-          (result %! v_FIELD_MODULUS <: i32) =. (value %! v_FIELD_MODULUS <: i32)) =
-  let t:i64 = (Core.Convert.f_from value <: i64) *! v_BARRETT_MULTIPLIER in
-  let t:i64 = t +! (v_BARRETT_R >>! 1l <: i64) in
-  let quotient:i64 = t >>! v_BARRETT_SHIFT in
-  let quotient:i32 = cast (quotient <: i64) <: i32 in
-  let sub:i32 = quotient *! v_FIELD_MODULUS in
-  let _:Prims.unit = Tutorial_src.Math.Lemmas.cancel_mul_mod quotient 3329l in
-  value -! sub
-// ANCHOR_END: barrett
-
-// ANCHOR: encrypt_decrypt
-let decrypt (ciphertext key: u32) : u32 = ciphertext ^. key
-
-let encrypt (plaintext key: u32) : u32 = plaintext ^. key
-// ANCHOR_END: encrypt_decrypt
-
-
-
-
-
-
-
-// ANCHOR: encrypt_decrypt_identity
-let encrypt_decrypt_identity (key plaintext: u32)
-    : Lemma (requires true)
-      (ensures (decrypt (encrypt plaintext key <: u32) key <: u32) =. plaintext) = ()
-// ANCHOR_END: encrypt_decrypt_identity
-
-// ANCHOR: square
-let square (x: u8) : u8 = x *! x
-// ANCHOR_END: square
-
-// ANCHOR: square_ensures
-let square_ensures (x: u8)
-    : Pure u8
-      (requires x <. 16uy)
-      (ensures fun result -> result >=. x) 
-    = x *! x
-// ANCHOR_END: square_ensures
-
-// ANCHOR: square_option
-let square_option (x: u8) : Core.Option.t_Option u8 =
-  if x >=. 16uy
-  then Core.Option.Option_None <: Core.Option.t_Option u8
-  else Core.Option.Option_Some (x *! x) <: Core.Option.t_Option u8
-// ANCHOR_END: square_option
-
-// ANCHOR: square_requires
-let square_requires (x: u8) 
-  : Pure u8 (requires x <. 16uy) (requires fun _ -> True)
-  = x *! x
-// ANCHOR_END: square_requires
-
-// ANCHOR: F
-let v_Q: u16 = 2347us
-
-type t_F = { f_v:f_v: u16{f_v <. v_Q} }
-// ANCHOR_END: F
-
-// ANCHOR: AddF
-[@@ FStar.Tactics.Typeclasses.tcinstance]
-let impl: Core.Ops.Arith.t_Add t_F t_F =
-  {
-    f_Output = t_F;
-    f_add_pre = (fun (self: t_F) (rhs: t_F) -> true);
-    f_add_post = (fun (self: t_F) (rhs: t_F) (out: t_F) -> true);
-    f_add = fun (self: t_F) (rhs: t_F) -> { 
-          f_v = (self.f_v +! rhs.f_v <: u16) %! v_Q 
-      } <: t_F
-  }
-// ANCHOR_END: AddF
diff --git a/book/src/tutorial/data-invariants.md b/book/src/tutorial/data-invariants.md
index a6777795f..285413bb2 100644
--- a/book/src/tutorial/data-invariants.md
+++ b/book/src/tutorial/data-invariants.md
@@ -25,11 +25,12 @@ Rust alone already can solve our representation issues with
 define the `enum` type `F3` which has only three constructor: `F3`
 represent exactly the elements of `F₃`, not more, not less.
 
-```rust,noplaypen
-{{#include sources.rs:F3}}
-```
-```ocaml
-{{#include Sources.fst:F3}}
+```rust,editable
+enum F3 {
+    E1,
+    E2,
+    E3,
+}
 ```
 
 With `F3`, there doesn't exist illegal values at all: we can now
@@ -53,11 +54,14 @@ one `u16` field `v`. Notice the refinment annotation on `v`: the
 extraction of this type `F` via hax will result in a type enforcing
 `v` small enough.
 
-```rust,noplaypen
-{{#include sources.rs:F}}
-```
-```ocaml
-{{#include Sources.fst:F}}
+```rust,editable
+pub const Q: u16 = 2347;
+
+#[hax_lib::attributes]
+pub struct F {
+    #[hax_lib::refine(v < Q)]
+    pub v: u16,
+}
 ```
 
 In Rust, we can now define functions that operates on type `F`,
@@ -65,11 +69,25 @@ assuming they are in bounds with respect to `F₂₃₄₇`: every such
 assumption will be checked and enforced by the proof assistant. As an
 example, below is the implementation of the addition for type `F`.
 
-```rust,noplaypen
-{{#include sources.rs:AddF}}
-```
-```ocaml
-{{#include Sources.fst:AddF}}
+```rust,editable
+# pub const Q: u16 = 2347;
+# 
+# #[hax_lib::attributes]
+# pub struct F {
+#     #[hax_lib::refine(v < Q)]
+#     pub v: u16,
+# }
+
+use core::ops::Add;
+
+impl Add for F {
+    type Output = Self;
+    fn add(self, rhs: Self) -> Self {
+        Self {
+            v: (self.v + rhs.v) % Q,
+        }
+    }
+}
 ```
 
 Here, F* is able to prove automatically that (1) the addition doesn't
diff --git a/book/src/tutorial/panic-freedom.md b/book/src/tutorial/panic-freedom.md
index 38d2f2c33..ab996f58d 100644
--- a/book/src/tutorial/panic-freedom.md
+++ b/book/src/tutorial/panic-freedom.md
@@ -5,15 +5,13 @@ integer. To extract this function to F* using hax, we simply need to
 run the command `cargo hax into fstar` in the directory of the crate
 in which the function `square` is defined.
 
-*Note: throughout this tutorial, you can inspect the hax extraction to
-F\* for each code Rust snippets, by clicking on the "F\* extraction"
-tab.*
+*Note: throughout this tutorial, you can edit the snippets of code and
+extract to F\* by clicking the play button ( <i class="fa fa-play"></i> ), or even typecheck it with the button ( <i class="fa fa-check"></i> ).*
 
-```rust,noplaypen
-{{#include sources.rs:square}}
-```
-```ocaml
-{{#include Sources.fst:square}}
+```rust,editable
+fn square(x: u8) -> u8 {
+    x * x
+}
 ```
 
 Though, if we try to verify this function, F* is complaining about a
@@ -58,11 +56,14 @@ its input is within `0` and `15`.
 
 ### Solution A: reflect the partialness of the function in Rust
 A first solution is to make `square` return an `Option<u8>` instead of a `u8`:
-```rust,noplaypen
-{{#include sources.rs:square_option}}
-```
-```ocaml
-{{#include Sources.fst:square_option}}
+```rust,editable
+fn square_option(x: u8) -> Option<u8> {
+    if x >= 16 {
+        None
+    } else {
+        Some(x * x)
+    }
+}
 ```
 
 Here, F* is able to prove panic-freedom: calling `square` with any
@@ -90,11 +91,11 @@ provdes the `requires`
 [proc-macro](https://doc.rust-lang.org/reference/procedural-macros.html)
 which lets user writting pre-conditions directly in Rust.
 
-```rust,noplaypen
-{{#include sources.rs:square_requires}}
-```
-```ocaml
-{{#include Sources.fst:square_requires}}
+```rust,editable
+#[hax_lib::requires(x < 16)]
+fn square_requires(x: u8) -> u8 {
+    x * x
+}
 ```
 
 With this precondition, F* is able to prove panic freedom. From now
diff --git a/book/src/tutorial/properties.md b/book/src/tutorial/properties.md
index 5e1a438ab..fb411243e 100644
--- a/book/src/tutorial/properties.md
+++ b/book/src/tutorial/properties.md
@@ -9,12 +9,12 @@ _return a value_: it will not panic or diverge. We could enrich the
 contract of `square` with a post-condition about the fact it is a
 increasing function:
 
-```rust,noplaypen
-{{#include sources.rs:square_ensures}}
-```
-
-```ocaml
-{{#include Sources.fst:square_ensures}}
+```rust,editable
+#[hax_lib::requires(x < 16)]
+#[hax_lib::ensures(|result| result >= x)]
+fn square_ensures(x: u8) -> u8 {
+    x * x
+}
 ```
 
 Such a simple post-condition is automatically proven by F\*. The
@@ -37,12 +37,30 @@ Given `value` a field element (a `i32` whose absolute value is at most
 It is easy to write this contract directly as `hax::requires` and
 `hax::ensures` annotations, as shown in the snippet below.
 
-```rust,noplaypen
-{{#include sources.rs:barrett}}
-```
+```rust,editable
+type FieldElement = i32;
+const FIELD_MODULUS: i32 = 3329;
+const BARRETT_SHIFT: i64 = 26;
+const BARRETT_R: i64 = 0x4000000; // 2^26
+const BARRETT_MULTIPLIER: i64 = 20159; // ⌊(BARRETT_R / FIELD_MODULUS) + 1/2⌋
+
+#[hax_lib::requires((i64::from(value) >= -BARRETT_R && i64::from(value) <= BARRETT_R))]
+#[hax_lib::ensures(|result| result > -FIELD_MODULUS && result < FIELD_MODULUS
+                     && result %  FIELD_MODULUS ==  value % FIELD_MODULUS)]
+fn barrett_reduce(value: i32) -> i32 {
+    let t = i64::from(value) * BARRETT_MULTIPLIER;
+    let t = t + (BARRETT_R >> 1);
+
+    let quotient = t >> BARRETT_SHIFT;
+    let quotient = quotient as i32;
 
-```ocaml
-{{#include Sources.fst:barrett}}
+    let sub = quotient * FIELD_MODULUS;
+
+    // Here a lemma to prove that `(quotient * 3329) % 3329 = 0`
+    // may have to be called in F*.
+
+    value - sub
+}
 ```
 
 <!-- Note that we call to `cancel_mul_mod`, a lemma: in Rust, this have no
@@ -76,12 +94,14 @@ property: encrypting a ciphertext and decrypting the result with a
 same key produces the ciphertext again. `|c| decrypt(c, key)` is the
 inverse of `|p| encrypt(p, key)`.
 
-```rust,noplaypen
-{{#include sources.rs:encrypt_decrypt}}
-```
+```rust,editable
+fn encrypt(plaintext: u32, key: u32) -> u32 {
+    plaintext ^ key
+}
 
-```ocaml
-{{#include Sources.fst:encrypt_decrypt}}
+fn decrypt(ciphertext: u32, key: u32) -> u32 {
+    ciphertext ^ key
+}
 ```
 
 In this situation, adding a pre- or a post-condition to either
@@ -97,10 +117,20 @@ proof itself are not relevant, at this stage, we only care about the
 statement. The proof will be completed manually in the proof
 assistant.
 
-```rust,noplaypen
-{{#include sources.rs:encrypt_decrypt_identity}}
-```
-
-```ocaml
-{{#include Sources.fst:encrypt_decrypt_identity}}
+```rust,editable
+# fn encrypt(plaintext: u32, key: u32) -> u32 {
+#     plaintext ^ key
+# }
+# 
+# fn decrypt(ciphertext: u32, key: u32) -> u32 {
+#     ciphertext ^ key
+# }
+# 
+#[hax_lib::lemma]
+#[hax_lib::requires(true)]
+fn encrypt_decrypt_identity(
+    key: u32,
+    plaintext: u32,
+) -> Proof<{ decrypt(encrypt(plaintext, key), key) == plaintext }> {
+}
 ```
diff --git a/book/src/tutorial/sources.rs b/book/src/tutorial/sources.rs
deleted file mode 100644
index 74bd51b6f..000000000
--- a/book/src/tutorial/sources.rs
+++ /dev/null
@@ -1,138 +0,0 @@
-// ANCHOR: square
-fn square(x: u8) -> u8 {
-    x * x
-}
-// ANCHOR_END: square
-
-// ANCHOR: square_option
-fn square_option(x: u8) -> Option<u8> {
-    if x >= 16 {
-        None
-    } else {
-        Some(x * x)
-    }
-}
-// ANCHOR_END: square_option
-
-// ANCHOR: square_requires
-#[hax_lib::requires(x < 16)]
-fn square_requires(x: u8) -> u8 {
-    x * x
-}
-// ANCHOR_END: square_requires
-
-// ANCHOR: square_ensures
-#[hax_lib::requires(x < 16)]
-#[hax_lib::ensures(|result| result >= x)]
-fn square_ensures(x: u8) -> u8 {
-    x * x
-}
-// ANCHOR_END: square_ensures
-
-// ANCHOR: barrett
-type FieldElement = i32;
-const FIELD_MODULUS: i32 = 3329;
-const BARRETT_SHIFT: i64 = 26;
-const BARRETT_R: i64 = 0x4000000; // 2^26
-const BARRETT_MULTIPLIER: i64 = 20159; // ⌊(BARRETT_R / FIELD_MODULUS) + 1/2⌋
-
-#[hax_lib::requires((i64::from(value) >= -BARRETT_R && i64::from(value) <= BARRETT_R))]
-#[hax_lib::ensures(|result| result > -FIELD_MODULUS && result < FIELD_MODULUS
-                     && result %  FIELD_MODULUS ==  value % FIELD_MODULUS)]
-fn barrett_reduce(value: i32) -> i32 {
-    let t = i64::from(value) * BARRETT_MULTIPLIER;
-    let t = t + (BARRETT_R >> 1);
-
-    let quotient = t >> BARRETT_SHIFT;
-    let quotient = quotient as i32;
-
-    let sub = quotient * FIELD_MODULUS;
-
-    // Here a lemma to prove that `(quotient * 3329) % 3329 = 0`
-    // may have to be called in F*.
-
-    value - sub
-}
-// ANCHOR_END: barrett
-
-#[hax_lib::exclude]
-pub(crate) mod math {
-    pub(crate) mod lemmas {
-        pub(crate) fn cancel_mul_mod(a: i32, n: i32) {}
-    }
-}
-
-// ANCHOR: encrypt_decrypt
-fn encrypt(plaintext: u32, key: u32) -> u32 {
-    plaintext ^ key
-}
-
-fn decrypt(ciphertext: u32, key: u32) -> u32 {
-    ciphertext ^ key
-}
-// ANCHOR_END: encrypt_decrypt
-
-// ANCHOR: encrypt_decrypt_identity
-#[hax_lib::lemma]
-#[hax_lib::requires(true)]
-fn encrypt_decrypt_identity(
-    key: u32,
-    plaintext: u32,
-) -> Proof<{ decrypt(encrypt(plaintext, key), key) == plaintext }> {
-}
-// ANCHOR_END: encrypt_decrypt_identity
-
-// ANCHOR: F3
-enum F3 {
-    E1,
-    E2,
-    E3,
-}
-// ANCHOR_END: F3
-
-// ANCHOR: F
-pub const Q: u16 = 2347;
-
-#[hax_lib::attributes]
-pub struct F {
-    #[hax_lib::refine(v < Q)]
-    pub v: u16,
-}
-// ANCHOR_END: F
-
-// ANCHOR: AddF
-use core::ops::Add;
-
-impl Add for F {
-    type Output = Self;
-    fn add(self, rhs: Self) -> Self {
-        Self {
-            v: (self.v + rhs.v) % Q,
-        }
-    }
-}
-// ANCHOR_END: AddF
-
-// fn is_divisible_by(lhs: u32, rhs: u32) -> bool {
-//     if rhs == 0 {
-//         return false;
-//     }
-
-//     lhs % rhs == 0
-// }
-
-// fn encrypt(plaintext: u32, key: u32) -> u32 {
-//     plaintext ^ key
-// }
-
-// fn decrypt(ciphertext: u32, key: u32) -> u32 {
-//     ciphertext ^ key
-// }
-
-// #[hax_lib::lemma]
-// #[hax_lib::requires(true)]
-// fn encrypt_decrypt_identity(
-//     plaintext: u32,
-//     key: u32,
-// ) -> Proof<{ decrypt(encrypt(plaintext, key), key) == plaintext }> {
-// }
diff --git a/book/static/custom.css b/book/static/custom.css
new file mode 100644
index 000000000..cf40db607
--- /dev/null
+++ b/book/static/custom.css
@@ -0,0 +1,16 @@
+input.user-checkable {
+    transform: scale(1.5);
+    margin-right: 8px;
+    margin-left: 8px;
+}
+
+ul:has(> li > .user-checkable) {
+    list-style-type: none;
+    padding: 0;
+    margin: 0;
+}
+li:has(> .user-checkable) {
+    list-style-type: none;
+    padding: 0;
+    margin: 0;
+}
diff --git a/book/static/see-fstar-extraction.css b/book/static/see-fstar-extraction.css
new file mode 100644
index 000000000..f9109499a
--- /dev/null
+++ b/book/static/see-fstar-extraction.css
@@ -0,0 +1,25 @@
+.rust-fstar-wrapper .buttons {
+    text-align: right;
+    margin-right: 8px;
+}
+.rust-fstar-wrapper button {
+    border: none;
+    background: none;
+    padding: 4px 14px;
+}
+.rust-fstar-wrapper .buttons .fstar-rust-snippet-active {
+    background: #f6f7f6;
+    opacity: 1;
+}
+.rust-fstar-wrapper .buttons button:hover {
+    opacity: 1;
+}
+.rust-fstar-wrapper .buttons .fstar-rust-snippet-hidden {
+    opacity: 0.4;
+}
+.rust-fstar-wrapper .snippets .snippet.fstar-rust-snippet-hidden {
+    display: none;
+}
+.rust-fstar-wrapper .snippets .snippet pre {
+    margin-top: 0;
+}
diff --git a/book/static/see-fstar-extraction.js b/book/static/see-fstar-extraction.js
new file mode 100644
index 000000000..0dfb76292
--- /dev/null
+++ b/book/static/see-fstar-extraction.js
@@ -0,0 +1,38 @@
+function installButtons() {
+    let id = 0;
+    for(let fst of document.querySelectorAll('pre + pre')) {
+        let parent = fst.parentElement;
+        let rust = fst.previousElementSibling;
+        let w = s => `<div class=snippet>${s}</div>`;
+        let both = w(rust.outerHTML) + w(fst.outerHTML);
+        parent.removeChild(rust);
+        let snippets = document.createElement('div');
+        snippets.classList.add('snippets');
+        snippets.innerHTML = both;
+        let buttons = document.createElement('div');
+        id++;
+        buttons.classList.add('buttons');
+        buttons.innerHTML  = `<button>Rust</button><button>F* extraction</button>`;
+        let mk_active = i => {
+            [snippets, buttons].map(el => 
+                [...el.children].map((x, j) => {
+                    x.classList[j==i ? 'remove' : 'add']('fstar-rust-snippet-hidden');
+                    x.classList[j==i ? 'add' : 'remove']('fstar-rust-snippet-active');
+                })
+            );
+        };
+        [...buttons.children].map((child, nth) =>
+            (child.onclick = _ => mk_active(nth))
+        );
+        const RUST = 0;
+        mk_active(RUST);
+        
+        let wrapper = document.createElement('div');
+        wrapper.classList.add('rust-fstar-wrapper');
+        wrapper.appendChild(buttons);
+        wrapper.appendChild(snippets);
+        parent.replaceChild(wrapper, fst);
+    }
+};
+
+window.addEventListener("load", installButtons);
diff --git a/book/theme/ansi_up.js b/book/theme/ansi_up.js
new file mode 100644
index 000000000..14d62117c
--- /dev/null
+++ b/book/theme/ansi_up.js
@@ -0,0 +1,7 @@
+/**
+ * Minified by jsDelivr using Terser v5.19.2.
+ * Original file: /npm/ansi_up@6.0.2/ansi_up.js
+ *
+ * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
+ */
+"use strict";var PacketKind,templateObject_1,templateObject_2,templateObject_3,__makeTemplateObject=this&&this.__makeTemplateObject||function(e,t){return Object.defineProperty?Object.defineProperty(e,"raw",{value:t}):e.raw=t,e};!function(e){e[e.EOS=0]="EOS",e[e.Text=1]="Text",e[e.Incomplete=2]="Incomplete",e[e.ESC=3]="ESC",e[e.Unknown=4]="Unknown",e[e.SGR=5]="SGR",e[e.OSCURL=6]="OSCURL"}(PacketKind||(PacketKind={}));class AnsiUp{constructor(){this.VERSION="6.0.2",this.setup_palettes(),this._use_classes=!1,this.bold=!1,this.faint=!1,this.italic=!1,this.underline=!1,this.fg=this.bg=null,this._buffer="",this._url_allowlist={http:1,https:1},this._escape_html=!0,this.boldStyle="font-weight:bold",this.faintStyle="opacity:0.7",this.italicStyle="font-style:italic",this.underlineStyle="text-decoration:underline"}set use_classes(e){this._use_classes=e}get use_classes(){return this._use_classes}set url_allowlist(e){this._url_allowlist=e}get url_allowlist(){return this._url_allowlist}set escape_html(e){this._escape_html=e}get escape_html(){return this._escape_html}set boldStyle(e){this._boldStyle=e}get boldStyle(){return this._boldStyle}set faintStyle(e){this._faintStyle=e}get faintStyle(){return this._faintStyle}set italicStyle(e){this._italicStyle=e}get italicStyle(){return this._italicStyle}set underlineStyle(e){this._underlineStyle=e}get underlineStyle(){return this._underlineStyle}setup_palettes(){this.ansi_colors=[[{rgb:[0,0,0],class_name:"ansi-black"},{rgb:[187,0,0],class_name:"ansi-red"},{rgb:[0,187,0],class_name:"ansi-green"},{rgb:[187,187,0],class_name:"ansi-yellow"},{rgb:[0,0,187],class_name:"ansi-blue"},{rgb:[187,0,187],class_name:"ansi-magenta"},{rgb:[0,187,187],class_name:"ansi-cyan"},{rgb:[255,255,255],class_name:"ansi-white"}],[{rgb:[85,85,85],class_name:"ansi-bright-black"},{rgb:[255,85,85],class_name:"ansi-bright-red"},{rgb:[0,255,0],class_name:"ansi-bright-green"},{rgb:[255,255,85],class_name:"ansi-bright-yellow"},{rgb:[85,85,255],class_name:"ansi-bright-blue"},{rgb:[255,85,255],class_name:"ansi-bright-magenta"},{rgb:[85,255,255],class_name:"ansi-bright-cyan"},{rgb:[255,255,255],class_name:"ansi-bright-white"}]],this.palette_256=[],this.ansi_colors.forEach((e=>{e.forEach((e=>{this.palette_256.push(e)}))}));let e=[0,95,135,175,215,255];for(let t=0;t<6;++t)for(let n=0;n<6;++n)for(let i=0;i<6;++i){let s={rgb:[e[t],e[n],e[i]],class_name:"truecolor"};this.palette_256.push(s)}let t=8;for(let e=0;e<24;++e,t+=10){let e={rgb:[t,t,t],class_name:"truecolor"};this.palette_256.push(e)}}escape_txt_for_html(e){return this._escape_html?e.replace(/[&<>"']/gm,(e=>"&"===e?"&amp;":"<"===e?"&lt;":">"===e?"&gt;":'"'===e?"&quot;":"'"===e?"&#x27;":void 0)):e}append_buffer(e){var t=this._buffer+e;this._buffer=t}get_next_packet(){var e={kind:PacketKind.EOS,text:"",url:""},t=this._buffer.length;if(0==t)return e;var n=this._buffer.indexOf("");if(-1==n)return e.kind=PacketKind.Text,e.text=this._buffer,this._buffer="",e;if(n>0)return e.kind=PacketKind.Text,e.text=this._buffer.slice(0,n),this._buffer=this._buffer.slice(n),e;if(0==n){if(t<3)return e.kind=PacketKind.Incomplete,e;var i=this._buffer.charAt(1);if("["!=i&&"]"!=i&&"("!=i)return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e;if("["==i){this._csi_regex||(this._csi_regex=rgx(templateObject_1||(templateObject_1=__makeTemplateObject(["\n                        ^                           # beginning of line\n                                                    #\n                                                    # First attempt\n                        (?:                         # legal sequence\n                          [                      # CSI\n                          ([<-?]?)              # private-mode char\n                          ([d;]*)                    # any digits or semicolons\n                          ([ -/]?               # an intermediate modifier\n                          [@-~])                # the command\n                        )\n                        |                           # alternate (second attempt)\n                        (?:                         # illegal sequence\n                          [                      # CSI\n                          [ -~]*                # anything legal\n                          ([\0-:])              # anything illegal\n                        )\n                    "],["\n                        ^                           # beginning of line\n                                                    #\n                                                    # First attempt\n                        (?:                         # legal sequence\n                          \\x1b\\[                      # CSI\n                          ([\\x3c-\\x3f]?)              # private-mode char\n                          ([\\d;]*)                    # any digits or semicolons\n                          ([\\x20-\\x2f]?               # an intermediate modifier\n                          [\\x40-\\x7e])                # the command\n                        )\n                        |                           # alternate (second attempt)\n                        (?:                         # illegal sequence\n                          \\x1b\\[                      # CSI\n                          [\\x20-\\x7e]*                # anything legal\n                          ([\\x00-\\x1f:])              # anything illegal\n                        )\n                    "]))));let t=this._buffer.match(this._csi_regex);if(null===t)return e.kind=PacketKind.Incomplete,e;if(t[4])return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e;""!=t[1]||"m"!=t[3]?e.kind=PacketKind.Unknown:e.kind=PacketKind.SGR,e.text=t[2];var s=t[0].length;return this._buffer=this._buffer.slice(s),e}if("]"==i){if(t<4)return e.kind=PacketKind.Incomplete,e;if("8"!=this._buffer.charAt(2)||";"!=this._buffer.charAt(3))return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e;this._osc_st||(this._osc_st=rgxG(templateObject_2||(templateObject_2=__makeTemplateObject(["\n                        (?:                         # legal sequence\n                          (\\)                    # ESC                           |                           # alternate\n                          ()                      # BEL (what xterm did)\n                        )\n                        |                           # alternate (second attempt)\n                        (                           # illegal sequence\n                          [\0-]                 # anything illegal\n                          |                           # alternate\n                          [\b-]                 # anything illegal\n                          |                           # alternate\n                          [-]                 # anything illegal\n                        )\n                    "],["\n                        (?:                         # legal sequence\n                          (\\x1b\\\\)                    # ESC \\\n                          |                           # alternate\n                          (\\x07)                      # BEL (what xterm did)\n                        )\n                        |                           # alternate (second attempt)\n                        (                           # illegal sequence\n                          [\\x00-\\x06]                 # anything illegal\n                          |                           # alternate\n                          [\\x08-\\x1a]                 # anything illegal\n                          |                           # alternate\n                          [\\x1c-\\x1f]                 # anything illegal\n                        )\n                    "])))),this._osc_st.lastIndex=0;{let t=this._osc_st.exec(this._buffer);if(null===t)return e.kind=PacketKind.Incomplete,e;if(t[3])return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e}{let t=this._osc_st.exec(this._buffer);if(null===t)return e.kind=PacketKind.Incomplete,e;if(t[3])return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e}this._osc_regex||(this._osc_regex=rgx(templateObject_3||(templateObject_3=__makeTemplateObject(["\n                        ^                           # beginning of line\n                                                    #\n                        ]8;                    # OSC Hyperlink\n                        [ -:<-~]*       # params (excluding ;)\n                        ;                           # end of params\n                        ([!-~]{0,512})        # URL capture\n                        (?:                         # ST\n                          (?:\\)                  # ESC                           |                           # alternate\n                          (?:)                    # BEL (what xterm did)\n                        )\n                        ([ -~]+)              # TEXT capture\n                        ]8;;                   # OSC Hyperlink End\n                        (?:                         # ST\n                          (?:\\)                  # ESC                           |                           # alternate\n                          (?:)                    # BEL (what xterm did)\n                        )\n                    "],["\n                        ^                           # beginning of line\n                                                    #\n                        \\x1b\\]8;                    # OSC Hyperlink\n                        [\\x20-\\x3a\\x3c-\\x7e]*       # params (excluding ;)\n                        ;                           # end of params\n                        ([\\x21-\\x7e]{0,512})        # URL capture\n                        (?:                         # ST\n                          (?:\\x1b\\\\)                  # ESC \\\n                          |                           # alternate\n                          (?:\\x07)                    # BEL (what xterm did)\n                        )\n                        ([\\x20-\\x7e]+)              # TEXT capture\n                        \\x1b\\]8;;                   # OSC Hyperlink End\n                        (?:                         # ST\n                          (?:\\x1b\\\\)                  # ESC \\\n                          |                           # alternate\n                          (?:\\x07)                    # BEL (what xterm did)\n                        )\n                    "]))));let n=this._buffer.match(this._osc_regex);if(null===n)return e.kind=PacketKind.ESC,e.text=this._buffer.slice(0,1),this._buffer=this._buffer.slice(1),e;e.kind=PacketKind.OSCURL,e.url=n[1],e.text=n[2];s=n[0].length;return this._buffer=this._buffer.slice(s),e}if("("==i)return e.kind=PacketKind.Unknown,this._buffer=this._buffer.slice(3),e}}ansi_to_html(e){this.append_buffer(e);for(var t=[];;){var n=this.get_next_packet();if(n.kind==PacketKind.EOS||n.kind==PacketKind.Incomplete)break;n.kind!=PacketKind.ESC&&n.kind!=PacketKind.Unknown&&(n.kind==PacketKind.Text?t.push(this.transform_to_html(this.with_state(n))):n.kind==PacketKind.SGR?this.process_ansi(n):n.kind==PacketKind.OSCURL&&t.push(this.process_hyperlink(n)))}return t.join("")}with_state(e){return{bold:this.bold,faint:this.faint,italic:this.italic,underline:this.underline,fg:this.fg,bg:this.bg,text:e.text}}process_ansi(e){let t=e.text.split(";");for(;t.length>0;){let e=t.shift(),n=parseInt(e,10);if(isNaN(n)||0===n)this.fg=null,this.bg=null,this.bold=!1,this.faint=!1,this.italic=!1,this.underline=!1;else if(1===n)this.bold=!0;else if(2===n)this.faint=!0;else if(3===n)this.italic=!0;else if(4===n)this.underline=!0;else if(21===n)this.bold=!1;else if(22===n)this.faint=!1,this.bold=!1;else if(23===n)this.italic=!1;else if(24===n)this.underline=!1;else if(39===n)this.fg=null;else if(49===n)this.bg=null;else if(n>=30&&n<38)this.fg=this.ansi_colors[0][n-30];else if(n>=40&&n<48)this.bg=this.ansi_colors[0][n-40];else if(n>=90&&n<98)this.fg=this.ansi_colors[1][n-90];else if(n>=100&&n<108)this.bg=this.ansi_colors[1][n-100];else if((38===n||48===n)&&t.length>0){let e=38===n,i=t.shift();if("5"===i&&t.length>0){let n=parseInt(t.shift(),10);n>=0&&n<=255&&(e?this.fg=this.palette_256[n]:this.bg=this.palette_256[n])}if("2"===i&&t.length>2){let n=parseInt(t.shift(),10),i=parseInt(t.shift(),10),s=parseInt(t.shift(),10);if(n>=0&&n<=255&&i>=0&&i<=255&&s>=0&&s<=255){let t={rgb:[n,i,s],class_name:"truecolor"};e?this.fg=t:this.bg=t}}}}}transform_to_html(e){let t=e.text;if(0===t.length)return t;if(t=this.escape_txt_for_html(t),!e.bold&&!e.italic&&!e.underline&&null===e.fg&&null===e.bg)return t;let n=[],i=[],s=e.fg,l=e.bg;e.bold&&n.push(this._boldStyle),e.faint&&n.push(this._faintStyle),e.italic&&n.push(this._italicStyle),e.underline&&n.push(this._underlineStyle),this._use_classes?(s&&("truecolor"!==s.class_name?i.push(`${s.class_name}-fg`):n.push(`color:rgb(${s.rgb.join(",")})`)),l&&("truecolor"!==l.class_name?i.push(`${l.class_name}-bg`):n.push(`background-color:rgb(${l.rgb.join(",")})`))):(s&&n.push(`color:rgb(${s.rgb.join(",")})`),l&&n.push(`background-color:rgb(${l.rgb})`));let a="",r="";return i.length&&(a=` class="${i.join(" ")}"`),n.length&&(r=` style="${n.join(";")}"`),`<span${r}${a}>${t}</span>`}process_hyperlink(e){let t=e.url.split(":");return t.length<1?"":this._url_allowlist[t[0]]?`<a href="${this.escape_txt_for_html(e.url)}">${this.escape_txt_for_html(e.text)}</a>`:""}}function rgx(e,...t){let n=e.raw[0].replace(/^\s+|\s+\n|\s*#[\s\S]*?\n|\n/gm,"");return new RegExp(n)}window.AnsiUp=AnsiUp;function rgxG(e,...t){let n=e.raw[0].replace(/^\s+|\s+\n|\s*#[\s\S]*?\n|\n/gm,"");return new RegExp(n,"g");}
diff --git a/book/theme/book.js b/book/theme/book.js
new file mode 100644
index 000000000..e2dee88cf
--- /dev/null
+++ b/book/theme/book.js
@@ -0,0 +1,776 @@
+"use strict";
+
+// Fix back button cache problem
+window.onunload = function () { };
+
+// Global variable, shared between modules
+function playground_text(playground, hidden = true) {
+    let code_block = playground.querySelector("code");
+
+    if (window.ace && code_block.classList.contains("editable")) {
+        let editor = window.ace.edit(code_block);
+        return editor.getValue();
+    } else if (hidden) {
+        return code_block.textContent;
+    } else {
+        return code_block.innerText;
+    }
+}
+
+(function codeSnippets() {
+    function fetch_with_timeout(url, options, timeout = 6000) {
+        return Promise.race([
+            fetch(url, options),
+            new Promise((_, reject) => setTimeout(() => reject(new Error('timeout')), timeout))
+        ]);
+    }
+
+    var playgrounds = Array.from(document.querySelectorAll(".playground"));
+
+    function handle_crate_list_update(playground_block, playground_crates) {
+        // update the play buttons after receiving the response
+        update_play_button(playground_block, playground_crates);
+
+        // and install on change listener to dynamically update ACE editors
+        if (window.ace) {
+            let code_block = playground_block.querySelector("code");
+            if (code_block.classList.contains("editable")) {
+                let editor = window.ace.edit(code_block);
+                editor.addEventListener("change", function (e) {
+                    update_play_button(playground_block, playground_crates);
+                });
+                // add Ctrl-Enter command to execute rust code
+                editor.commands.addCommand({
+                    name: "run",
+                    bindKey: {
+                        win: "Ctrl-Enter",
+                        mac: "Ctrl-Enter"
+                    },
+                    exec: _editor => run_rust_code(playground_block)
+                });
+            }
+        }
+    }
+
+    // updates the visibility of play button based on `no_run` class and
+    // used crates vs ones available on https://play.rust-lang.org
+    function update_play_button(pre_block, playground_crates) {
+        var play_button = pre_block.querySelector(".play-button");
+
+        // skip if code is `no_run`
+        if (pre_block.querySelector('code').classList.contains("no_run")) {
+            play_button.classList.add("hidden");
+            return;
+        }
+
+        // get list of `extern crate`'s from snippet
+        var txt = playground_text(pre_block);
+        var re = /extern\s+crate\s+([a-zA-Z_0-9]+)\s*;/g;
+        var snippet_crates = [];
+        var item;
+        while (item = re.exec(txt)) {
+            snippet_crates.push(item[1]);
+        }
+
+        // check if all used crates are available on play.rust-lang.org
+        var all_available = snippet_crates.every(function (elem) {
+            return playground_crates.indexOf(elem) > -1;
+        });
+
+        if (all_available) {
+            play_button.classList.remove("hidden");
+        } else {
+            play_button.classList.add("hidden");
+        }
+    }
+
+    function run_rust_code(code_block, query = 'fstar') {
+        var result_block = code_block.querySelector(".result");
+        if (!result_block) {
+            result_block = document.createElement('code');
+            result_block.className = 'result hljs language-fstar';
+
+            code_block.append(result_block);
+        }
+
+        let text = playground_text(code_block);
+        let classes = code_block.querySelector('code').classList;
+        let edition = "2015";
+        if(classes.contains("edition2018")) {
+            edition = "2018";
+        } else if(classes.contains("edition2021")) {
+            edition = "2021";
+        }
+        var params = {
+            version: "stable",
+            optimize: "0",
+            code: text,
+            edition: edition
+        };
+
+        if (text.indexOf("#![feature") !== -1) {
+            params.version = "nightly";
+        }
+
+        (async () => {
+            let raw_query = async (API_URL, hax_version, query, files, on_line_received) => {
+                let response = await fetch(`${API_URL}/query/${hax_version}/${query}`, {
+                    method: "POST",
+                    headers: {
+                        'Accept': 'application/json',
+                        'Content-Type': 'application/json'
+                    },
+                    body: JSON.stringify(files),
+                });
+                
+                let decoder = new TextDecoder();
+                let leftover = "";
+                let reader = response.body.getReader();
+                while (true) {
+                    const { done, value } = await reader.read();
+                    if (done) break;
+                    leftover += decoder.decode(value);
+                    let lines = leftover.split('\n');
+                    let entire_lines = lines.slice(0, -1);
+                    leftover = lines.slice(-1)[0];
+                    for (const line of entire_lines)
+                        on_line_received(line);
+                }
+            };
+
+            let hax_version = '5ca1c13023200dee0cca6237901a3b5a69ad345a';
+            let playground_url = 'https://hax-playground.cryspen.com';
+            let ansi_up = new AnsiUp();
+            let first = true;
+            let logs = document.createElement('div');
+            logs.style = 'font-size: 80%; background: #00000010; padding: 3px;';
+            raw_query(
+                playground_url,
+                hax_version,
+                query,
+                [['src/lib.rs', text]],
+                x => {
+                    if(first) {
+                        result_block.innerText = "";
+                        result_block.appendChild(logs);
+                    }
+                    first = false;
+                    let json = {};
+                    try {
+                        json = JSON.parse(x);
+                    } catch(_){}
+                    if (json.Stderr || json.Stdout) {
+                        logs.innerHTML += '<div>' + ansi_up.ansi_to_html(json.Stderr || json.Stdout) + "</div>";
+                    }
+                    if (json.Done) {
+                        let out = [];
+                        for(let file in json.Done.files) {
+                            if(file.endsWith('.rs'))
+                                continue;
+                            let contents = json.Done.files[file];
+                            contents = contents.split('open FStar.Mul')[1].trim();
+                            contents = contents.replace(/$/gm, ' ').trim();
+                            out.push([file, contents]);
+                        }
+                        if(json.Done.success)
+                            result_block.innerText = "";
+                        else
+                            result_block.innerHTML += "<br/>";
+                        let result = document.createElement('div');
+                        if(out.length == 1) {
+                            result.innerText = out[0][1];
+                        } else {
+                            result.innerText = out.map(([file, s]) => '(* File: ' + file + ' *) \n' + s).join('\n\n').trim();
+                        }
+                        result_block.appendChild(result);
+                        if(json.Done.success && query.includes('+tc')) {
+                            result_block.innerHTML += '<div style="float: left; padding: 3px; padding-top: 8px; position: relative; top: 6px;"><span style="color: gray;">Status: </span><span style="color: green">✓ F* successfully typechecked!</span></div>';
+                        }
+                        hljs.highlightBlock(result);
+                        result_block.innerHTML += `<br/><a style="float:right; font-family: 'Open Sans', sans-serif; font-size: 70%; cursor: pointer; color: gray; text-transform: uppercase;" href='${playground_url}/#fstar/${hax_version}/${LZString.compressToEncodedURIComponent(text)}'>Open in hax playground ↗</a>`;
+                    }
+                },
+            );
+        })();
+        // result_block.innerText = "Running...";
+
+        // result_block.innerText = "HELLO, input was " + text;
+        // result_block.classList.add("result-no-output");
+
+        // fetch_with_timeout("https://play.rust-lang.org/evaluate.json", {
+        //     headers: {
+        //         'Content-Type': "application/json",
+        //     },
+        //     method: 'POST',
+        //     mode: 'cors',
+        //     body: JSON.stringify(params)
+        // })
+        // .then(response => response.json())
+        // .then(response => {
+        //     if (response.result.trim() === '') {
+        //         result_block.innerText = "No output";
+        //         result_block.classList.add("result-no-output");
+        //     } else {
+        //         result_block.innerText = response.result;
+        //         result_block.classList.remove("result-no-output");
+        //     }
+        // })
+        // .catch(error => result_block.innerText = "Playground Communication: " + error.message);
+    }
+
+    // Syntax highlighting Configuration
+    hljs.configure({
+        tabReplace: '    ', // 4 spaces
+        languages: [],      // Languages used for auto-detection
+    });
+
+    let code_nodes = Array
+        .from(document.querySelectorAll('code'))
+        // Don't highlight `inline code` blocks in headers.
+        .filter(function (node) {return !node.parentElement.classList.contains("header"); });
+
+    if (window.ace) {
+        // language-rust class needs to be removed for editable
+        // blocks or highlightjs will capture events
+        code_nodes
+            .filter(function (node) {return node.classList.contains("editable"); })
+            .forEach(function (block) { block.classList.remove('language-rust'); });
+
+        code_nodes
+            .filter(function (node) {return !node.classList.contains("editable"); })
+            .forEach(function (block) { hljs.highlightBlock(block); });
+    } else {
+        code_nodes.forEach(function (block) { hljs.highlightBlock(block); });
+    }
+
+    // Adding the hljs class gives code blocks the color css
+    // even if highlighting doesn't apply
+    code_nodes.forEach(function (block) { block.classList.add('hljs'); });
+
+    Array.from(document.querySelectorAll("code.hljs")).forEach(function (block) {
+
+        var lines = Array.from(block.querySelectorAll('.boring'));
+        // If no lines were hidden, return
+        if (!lines.length) { return; }
+        block.classList.add("hide-boring");
+
+        var buttons = document.createElement('div');
+        buttons.className = 'buttons';
+        buttons.innerHTML = "<button class=\"fa fa-eye\" title=\"Show hidden lines\" aria-label=\"Show hidden lines\"></button>";
+
+        // add expand button
+        var pre_block = block.parentNode;
+        pre_block.insertBefore(buttons, pre_block.firstChild);
+
+        pre_block.querySelector('.buttons').addEventListener('click', function (e) {
+            if (e.target.classList.contains('fa-eye')) {
+                e.target.classList.remove('fa-eye');
+                e.target.classList.add('fa-eye-slash');
+                e.target.title = 'Hide lines';
+                e.target.setAttribute('aria-label', e.target.title);
+
+                block.classList.remove('hide-boring');
+            } else if (e.target.classList.contains('fa-eye-slash')) {
+                e.target.classList.remove('fa-eye-slash');
+                e.target.classList.add('fa-eye');
+                e.target.title = 'Show hidden lines';
+                e.target.setAttribute('aria-label', e.target.title);
+
+                block.classList.add('hide-boring');
+            }
+        });
+    });
+
+    if (window.playground_copyable) {
+        Array.from(document.querySelectorAll('pre code')).forEach(function (block) {
+            var pre_block = block.parentNode;
+            if (!pre_block.classList.contains('playground')) {
+                var buttons = pre_block.querySelector(".buttons");
+                if (!buttons) {
+                    buttons = document.createElement('div');
+                    buttons.className = 'buttons';
+                    pre_block.insertBefore(buttons, pre_block.firstChild);
+                }
+
+                var clipButton = document.createElement('button');
+                clipButton.className = 'fa fa-copy clip-button';
+                clipButton.title = 'Copy to clipboard';
+                clipButton.setAttribute('aria-label', clipButton.title);
+                clipButton.innerHTML = '<i class=\"tooltiptext\"></i>';
+
+                buttons.insertBefore(clipButton, buttons.firstChild);
+            }
+        });
+    }
+
+    // Process playground code blocks
+    Array.from(document.querySelectorAll(".playground")).forEach(function (pre_block) {
+        // Add play button
+        var buttons = pre_block.querySelector(".buttons");
+        if (!buttons) {
+            buttons = document.createElement('div');
+            buttons.className = 'buttons';
+            pre_block.insertBefore(buttons, pre_block.firstChild);
+        }
+
+        var runCodeButton = document.createElement('button');
+        runCodeButton.className = 'fa fa-play play-button';
+        runCodeButton.hidden = true;
+        runCodeButton.title = 'Extract this code';
+        runCodeButton.setAttribute('aria-label', runCodeButton.title);
+
+        runCodeButton.addEventListener('click', function (e) {
+            run_rust_code(pre_block);
+        });
+        
+        var runVerifyButton = document.createElement('button');
+        runVerifyButton.className = 'fa fa-check check-button';
+        runVerifyButton.hidden = true;
+        runVerifyButton.title = 'Extract and typecheck this code';
+        runVerifyButton.setAttribute('aria-label', runCodeButton.title);
+        
+        buttons.insertBefore(runVerifyButton, buttons.firstChild);
+        buttons.insertBefore(runCodeButton, buttons.firstChild);
+        runVerifyButton.addEventListener('click', function (e) {
+            run_rust_code(pre_block, 'fstar+tc');
+        });
+
+        if (window.playground_copyable) {
+            var copyCodeClipboardButton = document.createElement('button');
+            copyCodeClipboardButton.className = 'fa fa-copy clip-button';
+            copyCodeClipboardButton.innerHTML = '<i class="tooltiptext"></i>';
+            copyCodeClipboardButton.title = 'Copy to clipboard';
+            copyCodeClipboardButton.setAttribute('aria-label', copyCodeClipboardButton.title);
+
+            buttons.insertBefore(copyCodeClipboardButton, buttons.firstChild);
+        }
+
+        let code_block = pre_block.querySelector("code");
+        if (window.ace && code_block.classList.contains("editable")) {
+            var undoChangesButton = document.createElement('button');
+            undoChangesButton.className = 'fa fa-history reset-button';
+            undoChangesButton.title = 'Undo changes';
+            undoChangesButton.setAttribute('aria-label', undoChangesButton.title);
+
+            buttons.insertBefore(undoChangesButton, buttons.firstChild);
+
+            undoChangesButton.addEventListener('click', function () {
+                let editor = window.ace.edit(code_block);
+                editor.setValue(editor.originalCode);
+                editor.clearSelection();
+            });
+        }
+    });
+})();
+
+(function themes() {
+    var html = document.querySelector('html');
+    var themeToggleButton = document.getElementById('theme-toggle');
+    var themePopup = document.getElementById('theme-list');
+    var themeColorMetaTag = document.querySelector('meta[name="theme-color"]');
+    var stylesheets = {
+        ayuHighlight: document.querySelector("[href$='ayu-highlight.css']"),
+        tomorrowNight: document.querySelector("[href$='tomorrow-night.css']"),
+        highlight: document.querySelector("[href$='highlight.css']"),
+    };
+
+    function showThemes() {
+        themePopup.style.display = 'block';
+        themeToggleButton.setAttribute('aria-expanded', true);
+        themePopup.querySelector("button#" + get_theme()).focus();
+    }
+
+    function updateThemeSelected() {
+        themePopup.querySelectorAll('.theme-selected').forEach(function (el) {
+            el.classList.remove('theme-selected');
+        });
+        themePopup.querySelector("button#" + get_theme()).classList.add('theme-selected');
+    }
+
+    function hideThemes() {
+        themePopup.style.display = 'none';
+        themeToggleButton.setAttribute('aria-expanded', false);
+        themeToggleButton.focus();
+    }
+
+    function get_theme() {
+        var theme;
+        try { theme = localStorage.getItem('mdbook-theme'); } catch (e) { }
+        if (theme === null || theme === undefined) {
+            return default_theme;
+        } else {
+            return theme;
+        }
+    }
+
+    function set_theme(theme, store = true) {
+        let ace_theme;
+
+        if (theme == 'coal' || theme == 'navy') {
+            stylesheets.ayuHighlight.disabled = true;
+            stylesheets.tomorrowNight.disabled = false;
+            stylesheets.highlight.disabled = true;
+
+            ace_theme = "ace/theme/tomorrow_night";
+        } else if (theme == 'ayu') {
+            stylesheets.ayuHighlight.disabled = false;
+            stylesheets.tomorrowNight.disabled = true;
+            stylesheets.highlight.disabled = true;
+            ace_theme = "ace/theme/tomorrow_night";
+        } else {
+            stylesheets.ayuHighlight.disabled = true;
+            stylesheets.tomorrowNight.disabled = true;
+            stylesheets.highlight.disabled = false;
+            ace_theme = "ace/theme/dawn";
+        }
+
+        setTimeout(function () {
+            themeColorMetaTag.content = getComputedStyle(document.documentElement).backgroundColor;
+        }, 1);
+
+        if (window.ace && window.editors) {
+            window.editors.forEach(function (editor) {
+                editor.setTheme(ace_theme);
+            });
+        }
+
+        var previousTheme = get_theme();
+
+        if (store) {
+            try { localStorage.setItem('mdbook-theme', theme); } catch (e) { }
+        }
+
+        html.classList.remove(previousTheme);
+        html.classList.add(theme);
+        updateThemeSelected();
+    }
+
+    // Set theme
+    var theme = get_theme();
+
+    set_theme(theme, false);
+
+    themeToggleButton.addEventListener('click', function () {
+        if (themePopup.style.display === 'block') {
+            hideThemes();
+        } else {
+            showThemes();
+        }
+    });
+
+    themePopup.addEventListener('click', function (e) {
+        var theme;
+        if (e.target.className === "theme") {
+            theme = e.target.id;
+        } else if (e.target.parentElement.className === "theme") {
+            theme = e.target.parentElement.id;
+        } else {
+            return;
+        }
+        set_theme(theme);
+    });
+
+    themePopup.addEventListener('focusout', function(e) {
+        // e.relatedTarget is null in Safari and Firefox on macOS (see workaround below)
+        if (!!e.relatedTarget && !themeToggleButton.contains(e.relatedTarget) && !themePopup.contains(e.relatedTarget)) {
+            hideThemes();
+        }
+    });
+
+    // Should not be needed, but it works around an issue on macOS & iOS: https://github.com/rust-lang/mdBook/issues/628
+    document.addEventListener('click', function(e) {
+        if (themePopup.style.display === 'block' && !themeToggleButton.contains(e.target) && !themePopup.contains(e.target)) {
+            hideThemes();
+        }
+    });
+
+    document.addEventListener('keydown', function (e) {
+        if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; }
+        if (!themePopup.contains(e.target)) { return; }
+
+        switch (e.key) {
+            case 'Escape':
+                e.preventDefault();
+                hideThemes();
+                break;
+            case 'ArrowUp':
+                e.preventDefault();
+                var li = document.activeElement.parentElement;
+                if (li && li.previousElementSibling) {
+                    li.previousElementSibling.querySelector('button').focus();
+                }
+                break;
+            case 'ArrowDown':
+                e.preventDefault();
+                var li = document.activeElement.parentElement;
+                if (li && li.nextElementSibling) {
+                    li.nextElementSibling.querySelector('button').focus();
+                }
+                break;
+            case 'Home':
+                e.preventDefault();
+                themePopup.querySelector('li:first-child button').focus();
+                break;
+            case 'End':
+                e.preventDefault();
+                themePopup.querySelector('li:last-child button').focus();
+                break;
+        }
+    });
+})();
+
+(function sidebar() {
+    var body = document.querySelector("body");
+    var sidebar = document.getElementById("sidebar");
+    var sidebarLinks = document.querySelectorAll('#sidebar a');
+    var sidebarToggleButton = document.getElementById("sidebar-toggle");
+    var sidebarResizeHandle = document.getElementById("sidebar-resize-handle");
+    var firstContact = null;
+
+    function showSidebar() {
+        body.classList.remove('sidebar-hidden')
+        body.classList.add('sidebar-visible');
+        Array.from(sidebarLinks).forEach(function (link) {
+            link.setAttribute('tabIndex', 0);
+        });
+        sidebarToggleButton.setAttribute('aria-expanded', true);
+        sidebar.setAttribute('aria-hidden', false);
+        try { localStorage.setItem('mdbook-sidebar', 'visible'); } catch (e) { }
+    }
+
+
+    var sidebarAnchorToggles = document.querySelectorAll('#sidebar a.toggle');
+
+    function toggleSection(ev) {
+        ev.currentTarget.parentElement.classList.toggle('expanded');
+    }
+
+    Array.from(sidebarAnchorToggles).forEach(function (el) {
+        el.addEventListener('click', toggleSection);
+    });
+
+    function hideSidebar() {
+        body.classList.remove('sidebar-visible')
+        body.classList.add('sidebar-hidden');
+        Array.from(sidebarLinks).forEach(function (link) {
+            link.setAttribute('tabIndex', -1);
+        });
+        sidebarToggleButton.setAttribute('aria-expanded', false);
+        sidebar.setAttribute('aria-hidden', true);
+        try { localStorage.setItem('mdbook-sidebar', 'hidden'); } catch (e) { }
+    }
+
+    // Toggle sidebar
+    sidebarToggleButton.addEventListener('click', function sidebarToggle() {
+        if (body.classList.contains("sidebar-hidden")) {
+            var current_width = parseInt(
+                document.documentElement.style.getPropertyValue('--sidebar-width'), 10);
+            if (current_width < 150) {
+                document.documentElement.style.setProperty('--sidebar-width', '150px');
+            }
+            showSidebar();
+        } else if (body.classList.contains("sidebar-visible")) {
+            hideSidebar();
+        } else {
+            if (getComputedStyle(sidebar)['transform'] === 'none') {
+                hideSidebar();
+            } else {
+                showSidebar();
+            }
+        }
+    });
+
+    sidebarResizeHandle.addEventListener('mousedown', initResize, false);
+
+    function initResize(e) {
+        window.addEventListener('mousemove', resize, false);
+        window.addEventListener('mouseup', stopResize, false);
+        body.classList.add('sidebar-resizing');
+    }
+    function resize(e) {
+        var pos = (e.clientX - sidebar.offsetLeft);
+        if (pos < 20) {
+            hideSidebar();
+        } else {
+            if (body.classList.contains("sidebar-hidden")) {
+                showSidebar();
+            }
+            pos = Math.min(pos, window.innerWidth - 100);
+            document.documentElement.style.setProperty('--sidebar-width', pos + 'px');
+        }
+    }
+    //on mouseup remove windows functions mousemove & mouseup
+    function stopResize(e) {
+        body.classList.remove('sidebar-resizing');
+        window.removeEventListener('mousemove', resize, false);
+        window.removeEventListener('mouseup', stopResize, false);
+    }
+
+    document.addEventListener('touchstart', function (e) {
+        firstContact = {
+            x: e.touches[0].clientX,
+            time: Date.now()
+        };
+    }, { passive: true });
+
+    document.addEventListener('touchmove', function (e) {
+        if (!firstContact)
+            return;
+
+        var curX = e.touches[0].clientX;
+        var xDiff = curX - firstContact.x,
+            tDiff = Date.now() - firstContact.time;
+
+        if (tDiff < 250 && Math.abs(xDiff) >= 150) {
+            if (xDiff >= 0 && firstContact.x < Math.min(document.body.clientWidth * 0.25, 300))
+                showSidebar();
+            else if (xDiff < 0 && curX < 300)
+                hideSidebar();
+
+            firstContact = null;
+        }
+    }, { passive: true });
+})();
+
+(function chapterNavigation() {
+    document.addEventListener('keydown', function (e) {
+        if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; }
+        if (window.search && window.search.hasFocus()) { return; }
+        var html = document.querySelector('html');
+
+        function next() {
+            var nextButton = document.querySelector('.nav-chapters.next');
+            if (nextButton) {
+                window.location.href = nextButton.href;
+            }
+        }
+        function prev() {
+            var previousButton = document.querySelector('.nav-chapters.previous');
+            if (previousButton) {
+                window.location.href = previousButton.href;
+            }
+        }
+        switch (e.key) {
+            case 'ArrowRight':
+                e.preventDefault();
+                if (html.dir == 'rtl') {
+                    prev();
+                } else {
+                    next();
+                }
+                break;
+            case 'ArrowLeft':
+                e.preventDefault();
+                if (html.dir == 'rtl') {
+                    next();
+                } else {
+                    prev();
+                }
+                break;
+        }
+    });
+})();
+
+(function clipboard() {
+    var clipButtons = document.querySelectorAll('.clip-button');
+
+    function hideTooltip(elem) {
+        elem.firstChild.innerText = "";
+        elem.className = 'fa fa-copy clip-button';
+    }
+
+    function showTooltip(elem, msg) {
+        elem.firstChild.innerText = msg;
+        elem.className = 'fa fa-copy tooltipped';
+    }
+
+    var clipboardSnippets = new ClipboardJS('.clip-button', {
+        text: function (trigger) {
+            hideTooltip(trigger);
+            let playground = trigger.closest("pre");
+            return playground_text(playground, false);
+        }
+    });
+
+    Array.from(clipButtons).forEach(function (clipButton) {
+        clipButton.addEventListener('mouseout', function (e) {
+            hideTooltip(e.currentTarget);
+        });
+    });
+
+    clipboardSnippets.on('success', function (e) {
+        e.clearSelection();
+        showTooltip(e.trigger, "Copied!");
+    });
+
+    clipboardSnippets.on('error', function (e) {
+        showTooltip(e.trigger, "Clipboard error!");
+    });
+})();
+
+(function scrollToTop () {
+    var menuTitle = document.querySelector('.menu-title');
+
+    menuTitle.addEventListener('click', function () {
+        document.scrollingElement.scrollTo({ top: 0, behavior: 'smooth' });
+    });
+})();
+
+(function controllMenu() {
+    var menu = document.getElementById('menu-bar');
+
+    (function controllPosition() {
+        var scrollTop = document.scrollingElement.scrollTop;
+        var prevScrollTop = scrollTop;
+        var minMenuY = -menu.clientHeight - 50;
+        // When the script loads, the page can be at any scroll (e.g. if you reforesh it).
+        menu.style.top = scrollTop + 'px';
+        // Same as parseInt(menu.style.top.slice(0, -2), but faster
+        var topCache = menu.style.top.slice(0, -2);
+        menu.classList.remove('sticky');
+        var stickyCache = false; // Same as menu.classList.contains('sticky'), but faster
+        document.addEventListener('scroll', function () {
+            scrollTop = Math.max(document.scrollingElement.scrollTop, 0);
+            // `null` means that it doesn't need to be updated
+            var nextSticky = null;
+            var nextTop = null;
+            var scrollDown = scrollTop > prevScrollTop;
+            var menuPosAbsoluteY = topCache - scrollTop;
+            if (scrollDown) {
+                nextSticky = false;
+                if (menuPosAbsoluteY > 0) {
+                    nextTop = prevScrollTop;
+                }
+            } else {
+                if (menuPosAbsoluteY > 0) {
+                    nextSticky = true;
+                } else if (menuPosAbsoluteY < minMenuY) {
+                    nextTop = prevScrollTop + minMenuY;
+                }
+            }
+            if (nextSticky === true && stickyCache === false) {
+                menu.classList.add('sticky');
+                stickyCache = true;
+            } else if (nextSticky === false && stickyCache === true) {
+                menu.classList.remove('sticky');
+                stickyCache = false;
+            }
+            if (nextTop !== null) {
+                menu.style.top = nextTop + 'px';
+                topCache = nextTop;
+            }
+            prevScrollTop = scrollTop;
+        }, { passive: true });
+    })();
+    (function controllBorder() {
+        function updateBorder() {
+            if (menu.offsetTop === 0) {
+                menu.classList.remove('bordered');
+            } else {
+                menu.classList.add('bordered');
+            }
+        }
+        updateBorder();
+        document.addEventListener('scroll', updateBorder, { passive: true });
+    })();
+})();
diff --git a/book/theme/css/chrome.css b/book/theme/css/chrome.css
new file mode 100644
index 000000000..8b78255de
--- /dev/null
+++ b/book/theme/css/chrome.css
@@ -0,0 +1,606 @@
+/* CSS for UI elements (a.k.a. chrome) */
+
+@import 'variables.css';
+
+html {
+    scrollbar-color: var(--scrollbar) var(--bg);
+}
+#searchresults a,
+.content a:link,
+a:visited,
+a > .hljs {
+    color: var(--links);
+}
+
+/*
+    body-container is necessary because mobile browsers don't seem to like
+    overflow-x on the body tag when there is a <meta name="viewport"> tag.
+*/
+#body-container {
+    /*
+        This is used when the sidebar pushes the body content off the side of
+        the screen on small screens. Without it, dragging on mobile Safari
+        will want to reposition the viewport in a weird way.
+    */
+    overflow-x: clip;
+}
+
+/* Menu Bar */
+
+#menu-bar,
+#menu-bar-hover-placeholder {
+    z-index: 101;
+    margin: auto calc(0px - var(--page-padding));
+}
+#menu-bar {
+    position: relative;
+    display: flex;
+    flex-wrap: wrap;
+    background-color: var(--bg);
+    border-block-end-color: var(--bg);
+    border-block-end-width: 1px;
+    border-block-end-style: solid;
+}
+#menu-bar.sticky,
+.js #menu-bar-hover-placeholder:hover + #menu-bar,
+.js #menu-bar:hover,
+.js.sidebar-visible #menu-bar {
+    position: -webkit-sticky;
+    position: sticky;
+    top: 0 !important;
+}
+#menu-bar-hover-placeholder {
+    position: sticky;
+    position: -webkit-sticky;
+    top: 0;
+    height: var(--menu-bar-height);
+}
+#menu-bar.bordered {
+    border-block-end-color: var(--table-border-color);
+}
+#menu-bar i, #menu-bar .icon-button {
+    position: relative;
+    padding: 0 8px;
+    z-index: 10;
+    line-height: var(--menu-bar-height);
+    cursor: pointer;
+    transition: color 0.5s;
+}
+@media only screen and (max-width: 420px) {
+    #menu-bar i, #menu-bar .icon-button {
+        padding: 0 5px;
+    }
+}
+
+.icon-button {
+    border: none;
+    background: none;
+    padding: 0;
+    color: inherit;
+}
+.icon-button i {
+    margin: 0;
+}
+
+.right-buttons {
+    margin: 0 15px;
+}
+.right-buttons a {
+    text-decoration: none;
+}
+
+.left-buttons {
+    display: flex;
+    margin: 0 5px;
+}
+.no-js .left-buttons button {
+    display: none;
+}
+
+.menu-title {
+    display: inline-block;
+    font-weight: 200;
+    font-size: 2.4rem;
+    line-height: var(--menu-bar-height);
+    text-align: center;
+    margin: 0;
+    flex: 1;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+.js .menu-title {
+    cursor: pointer;
+}
+
+.menu-bar,
+.menu-bar:visited,
+.nav-chapters,
+.nav-chapters:visited,
+.mobile-nav-chapters,
+.mobile-nav-chapters:visited,
+.menu-bar .icon-button,
+.menu-bar a i {
+    color: var(--icons);
+}
+
+.menu-bar i:hover,
+.menu-bar .icon-button:hover,
+.nav-chapters:hover,
+.mobile-nav-chapters i:hover {
+    color: var(--icons-hover);
+}
+
+/* Nav Icons */
+
+.nav-chapters {
+    font-size: 2.5em;
+    text-align: center;
+    text-decoration: none;
+
+    position: fixed;
+    top: 0;
+    bottom: 0;
+    margin: 0;
+    max-width: 150px;
+    min-width: 90px;
+
+    display: flex;
+    justify-content: center;
+    align-content: center;
+    flex-direction: column;
+
+    transition: color 0.5s, background-color 0.5s;
+}
+
+.nav-chapters:hover {
+    text-decoration: none;
+    background-color: var(--theme-hover);
+    transition: background-color 0.15s, color 0.15s;
+}
+
+.nav-wrapper {
+    margin-block-start: 50px;
+    display: none;
+}
+
+.mobile-nav-chapters {
+    font-size: 2.5em;
+    text-align: center;
+    text-decoration: none;
+    width: 90px;
+    border-radius: 5px;
+    background-color: var(--sidebar-bg);
+}
+
+/* Only Firefox supports flow-relative values */
+.previous { float: left; }
+[dir=rtl] .previous { float: right; }
+
+/* Only Firefox supports flow-relative values */
+.next {
+    float: right;
+    right: var(--page-padding);
+}
+[dir=rtl] .next {
+    float: left;
+    right: unset;
+    left: var(--page-padding);
+}
+
+/* Use the correct buttons for RTL layouts*/
+[dir=rtl] .previous i.fa-angle-left:before {content:"\f105";}
+[dir=rtl] .next i.fa-angle-right:before { content:"\f104"; }
+
+@media only screen and (max-width: 1080px) {
+    .nav-wide-wrapper { display: none; }
+    .nav-wrapper { display: block; }
+}
+
+/* sidebar-visible */
+@media only screen and (max-width: 1380px) {
+    #sidebar-toggle-anchor:checked ~ .page-wrapper .nav-wide-wrapper { display: none; }
+    #sidebar-toggle-anchor:checked ~ .page-wrapper .nav-wrapper { display: block; }
+}
+
+/* Inline code */
+
+:not(pre) > .hljs {
+    display: inline;
+    padding: 0.1em 0.3em;
+    border-radius: 3px;
+}
+
+:not(pre):not(a) > .hljs {
+    color: var(--inline-code-color);
+    overflow-x: initial;
+}
+
+a:hover > .hljs {
+    text-decoration: underline;
+}
+
+pre {
+    position: relative;
+}
+pre > .buttons {
+    position: absolute;
+    z-index: 100;
+    right: 0px;
+    top: 2px;
+    margin: 0px;
+    padding: 2px 0px;
+
+    color: var(--sidebar-fg);
+    cursor: pointer;
+    visibility: hidden;
+    opacity: 0;
+    transition: visibility 0.1s linear, opacity 0.1s linear;
+}
+pre:hover > .buttons {
+    visibility: visible;
+    opacity: 1
+}
+pre > .buttons :hover {
+    color: var(--sidebar-active);
+    border-color: var(--icons-hover);
+    background-color: var(--theme-hover);
+}
+pre > .buttons i {
+    margin-inline-start: 8px;
+}
+pre > .buttons button {
+    cursor: inherit;
+    margin: 0px 5px;
+    padding: 3px 5px;
+    font-size: 14px;
+
+    border-style: solid;
+    border-width: 1px;
+    border-radius: 4px;
+    border-color: var(--icons);
+    background-color: var(--theme-popup-bg);
+    transition: 100ms;
+    transition-property: color,border-color,background-color;
+    color: var(--icons);
+}
+@media (pointer: coarse) {
+    pre > .buttons button {
+        /* On mobile, make it easier to tap buttons. */
+        padding: 0.3rem 1rem;
+    }
+
+    .sidebar-resize-indicator {
+        /* Hide resize indicator on devices with limited accuracy */
+        display: none;
+    }
+}
+pre > code {
+    display: block;
+    padding: 1rem;
+}
+
+/* FIXME: ACE editors overlap their buttons because ACE does absolute
+   positioning within the code block which breaks padding. The only solution I
+   can think of is to move the padding to the outer pre tag (or insert a div
+   wrapper), but that would require fixing a whole bunch of CSS rules.
+*/
+.hljs.ace_editor {
+  padding: 0rem 0rem;
+}
+
+pre > .result {
+    margin-block-start: 10px;
+}
+
+/* Search */
+
+#searchresults a {
+    text-decoration: none;
+}
+
+mark {
+    border-radius: 2px;
+    padding-block-start: 0;
+    padding-block-end: 1px;
+    padding-inline-start: 3px;
+    padding-inline-end: 3px;
+    margin-block-start: 0;
+    margin-block-end: -1px;
+    margin-inline-start: -3px;
+    margin-inline-end: -3px;
+    background-color: var(--search-mark-bg);
+    transition: background-color 300ms linear;
+    cursor: pointer;
+}
+
+mark.fade-out {
+    background-color: rgba(0,0,0,0) !important;
+    cursor: auto;
+}
+
+.searchbar-outer {
+    margin-inline-start: auto;
+    margin-inline-end: auto;
+    max-width: var(--content-max-width);
+}
+
+#searchbar {
+    width: 100%;
+    margin-block-start: 5px;
+    margin-block-end: 0;
+    margin-inline-start: auto;
+    margin-inline-end: auto;
+    padding: 10px 16px;
+    transition: box-shadow 300ms ease-in-out;
+    border: 1px solid var(--searchbar-border-color);
+    border-radius: 3px;
+    background-color: var(--searchbar-bg);
+    color: var(--searchbar-fg);
+}
+#searchbar:focus,
+#searchbar.active {
+    box-shadow: 0 0 3px var(--searchbar-shadow-color);
+}
+
+.searchresults-header {
+    font-weight: bold;
+    font-size: 1em;
+    padding-block-start: 18px;
+    padding-block-end: 0;
+    padding-inline-start: 5px;
+    padding-inline-end: 0;
+    color: var(--searchresults-header-fg);
+}
+
+.searchresults-outer {
+    margin-inline-start: auto;
+    margin-inline-end: auto;
+    max-width: var(--content-max-width);
+    border-block-end: 1px dashed var(--searchresults-border-color);
+}
+
+ul#searchresults {
+    list-style: none;
+    padding-inline-start: 20px;
+}
+ul#searchresults li {
+    margin: 10px 0px;
+    padding: 2px;
+    border-radius: 2px;
+}
+ul#searchresults li.focus {
+    background-color: var(--searchresults-li-bg);
+}
+ul#searchresults span.teaser {
+    display: block;
+    clear: both;
+    margin-block-start: 5px;
+    margin-block-end: 0;
+    margin-inline-start: 20px;
+    margin-inline-end: 0;
+    font-size: 0.8em;
+}
+ul#searchresults span.teaser em {
+    font-weight: bold;
+    font-style: normal;
+}
+
+/* Sidebar */
+
+.sidebar {
+    position: fixed;
+    left: 0;
+    top: 0;
+    bottom: 0;
+    width: var(--sidebar-width);
+    font-size: 0.875em;
+    box-sizing: border-box;
+    -webkit-overflow-scrolling: touch;
+    overscroll-behavior-y: contain;
+    background-color: var(--sidebar-bg);
+    color: var(--sidebar-fg);
+}
+[dir=rtl] .sidebar { left: unset; right: 0; }
+.sidebar-resizing {
+    -moz-user-select: none;
+    -webkit-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+}
+.no-js .sidebar,
+.js:not(.sidebar-resizing) .sidebar {
+    transition: transform 0.3s; /* Animation: slide away */
+}
+.sidebar code {
+    line-height: 2em;
+}
+.sidebar .sidebar-scrollbox {
+    overflow-y: auto;
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    padding: 10px 10px;
+}
+.sidebar .sidebar-resize-handle {
+    position: absolute;
+    cursor: col-resize;
+    width: 0;
+    right: calc(var(--sidebar-resize-indicator-width) * -1);
+    top: 0;
+    bottom: 0;
+    display: flex;
+    align-items: center;
+}
+
+.sidebar-resize-handle .sidebar-resize-indicator {
+    width: 100%;
+    height: 12px;
+    background-color: var(--icons);
+    margin-inline-start: var(--sidebar-resize-indicator-space);
+}
+
+[dir=rtl] .sidebar .sidebar-resize-handle {
+    left: calc(var(--sidebar-resize-indicator-width) * -1);
+    right: unset;
+}
+.js .sidebar .sidebar-resize-handle {
+    cursor: col-resize;
+    width: calc(var(--sidebar-resize-indicator-width) - var(--sidebar-resize-indicator-space));
+}
+/* sidebar-hidden */
+#sidebar-toggle-anchor:not(:checked) ~ .sidebar {
+    transform: translateX(calc(0px - var(--sidebar-width) - var(--sidebar-resize-indicator-width)));
+    z-index: -1;
+}
+[dir=rtl] #sidebar-toggle-anchor:not(:checked) ~ .sidebar {
+    transform: translateX(calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width)));
+}
+.sidebar::-webkit-scrollbar {
+    background: var(--sidebar-bg);
+}
+.sidebar::-webkit-scrollbar-thumb {
+    background: var(--scrollbar);
+}
+
+/* sidebar-visible */
+#sidebar-toggle-anchor:checked ~ .page-wrapper {
+    transform: translateX(calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width)));
+}
+[dir=rtl] #sidebar-toggle-anchor:checked ~ .page-wrapper {
+    transform: translateX(calc(0px - var(--sidebar-width) - var(--sidebar-resize-indicator-width)));
+}
+@media only screen and (min-width: 620px) {
+    #sidebar-toggle-anchor:checked ~ .page-wrapper {
+        transform: none;
+        margin-inline-start: calc(var(--sidebar-width) + var(--sidebar-resize-indicator-width));
+    }
+    [dir=rtl] #sidebar-toggle-anchor:checked ~ .page-wrapper {
+        transform: none;
+    }
+}
+
+.chapter {
+    list-style: none outside none;
+    padding-inline-start: 0;
+    line-height: 2.2em;
+}
+
+.chapter ol {
+    width: 100%;
+}
+
+.chapter li {
+    display: flex;
+    color: var(--sidebar-non-existant);
+}
+.chapter li a {
+    display: block;
+    padding: 0;
+    text-decoration: none;
+    color: var(--sidebar-fg);
+}
+
+.chapter li a:hover {
+    color: var(--sidebar-active);
+}
+
+.chapter li a.active {
+    color: var(--sidebar-active);
+}
+
+.chapter li > a.toggle {
+    cursor: pointer;
+    display: block;
+    margin-inline-start: auto;
+    padding: 0 10px;
+    user-select: none;
+    opacity: 0.68;
+}
+
+.chapter li > a.toggle div {
+    transition: transform 0.5s;
+}
+
+/* collapse the section */
+.chapter li:not(.expanded) + li > ol {
+    display: none;
+}
+
+.chapter li.chapter-item {
+    line-height: 1.5em;
+    margin-block-start: 0.6em;
+}
+
+.chapter li.expanded > a.toggle div {
+    transform: rotate(90deg);
+}
+
+.spacer {
+    width: 100%;
+    height: 3px;
+    margin: 5px 0px;
+}
+.chapter .spacer {
+    background-color: var(--sidebar-spacer);
+}
+
+@media (-moz-touch-enabled: 1), (pointer: coarse) {
+    .chapter li a { padding: 5px 0; }
+    .spacer { margin: 10px 0; }
+}
+
+.section {
+    list-style: none outside none;
+    padding-inline-start: 20px;
+    line-height: 1.9em;
+}
+
+/* Theme Menu Popup */
+
+.theme-popup {
+    position: absolute;
+    left: 10px;
+    top: var(--menu-bar-height);
+    z-index: 1000;
+    border-radius: 4px;
+    font-size: 0.7em;
+    color: var(--fg);
+    background: var(--theme-popup-bg);
+    border: 1px solid var(--theme-popup-border);
+    margin: 0;
+    padding: 0;
+    list-style: none;
+    display: none;
+    /* Don't let the children's background extend past the rounded corners. */
+    overflow: hidden;
+}
+[dir=rtl] .theme-popup { left: unset;  right: 10px; }
+.theme-popup .default {
+    color: var(--icons);
+}
+.theme-popup .theme {
+    width: 100%;
+    border: 0;
+    margin: 0;
+    padding: 2px 20px;
+    line-height: 25px;
+    white-space: nowrap;
+    text-align: start;
+    cursor: pointer;
+    color: inherit;
+    background: inherit;
+    font-size: inherit;
+}
+.theme-popup .theme:hover {
+    background-color: var(--theme-hover);
+}
+
+.theme-selected::before {
+    display: inline-block;
+    content: "✓";
+    margin-inline-start: -14px;
+    width: 14px;
+}
diff --git a/book/theme/css/general.css b/book/theme/css/general.css
new file mode 100644
index 000000000..e7d20da72
--- /dev/null
+++ b/book/theme/css/general.css
@@ -0,0 +1,234 @@
+/* Base styles and content styles */
+
+@import 'variables.css';
+
+:root {
+    /* Browser default font-size is 16px, this way 1 rem = 10px */
+    font-size: 62.5%;
+    color-scheme: var(--color-scheme);
+}
+
+html {
+    font-family: "Open Sans", sans-serif;
+    color: var(--fg);
+    background-color: var(--bg);
+    text-size-adjust: none;
+    -webkit-text-size-adjust: none;
+}
+
+body {
+    margin: 0;
+    font-size: 1.6rem;
+    overflow-x: hidden;
+}
+
+code {
+    font-family: var(--mono-font) !important;
+    font-size: var(--code-font-size);
+    direction: ltr !important;
+}
+
+/* make long words/inline code not x overflow */
+main {
+    overflow-wrap: break-word;
+}
+
+/* make wide tables scroll if they overflow */
+.table-wrapper {
+    overflow-x: auto;
+}
+
+/* Don't change font size in headers. */
+h1 code, h2 code, h3 code, h4 code, h5 code, h6 code {
+    font-size: unset;
+}
+
+.left { float: left; }
+.right { float: right; }
+.boring { opacity: 0.6; }
+.hide-boring .boring { display: none; }
+.hidden { display: none !important; }
+
+h2, h3 { margin-block-start: 2.5em; }
+h4, h5 { margin-block-start: 2em; }
+
+.header + .header h3,
+.header + .header h4,
+.header + .header h5 {
+    margin-block-start: 1em;
+}
+
+h1:target::before,
+h2:target::before,
+h3:target::before,
+h4:target::before,
+h5:target::before,
+h6:target::before {
+    display: inline-block;
+    content: "»";
+    margin-inline-start: -30px;
+    width: 30px;
+}
+
+/* This is broken on Safari as of version 14, but is fixed
+   in Safari Technology Preview 117 which I think will be Safari 14.2.
+   https://bugs.webkit.org/show_bug.cgi?id=218076
+*/
+:target {
+    /* Safari does not support logical properties */
+    scroll-margin-top: calc(var(--menu-bar-height) + 0.5em);
+}
+
+.page {
+    outline: 0;
+    padding: 0 var(--page-padding);
+    margin-block-start: calc(0px - var(--menu-bar-height)); /* Compensate for the #menu-bar-hover-placeholder */
+}
+.page-wrapper {
+    box-sizing: border-box;
+    background-color: var(--bg);
+}
+.no-js .page-wrapper,
+.js:not(.sidebar-resizing) .page-wrapper {
+    transition: margin-left 0.3s ease, transform 0.3s ease; /* Animation: slide away */
+}
+[dir=rtl] .js:not(.sidebar-resizing) .page-wrapper {
+    transition: margin-right 0.3s ease, transform 0.3s ease; /* Animation: slide away */
+}
+
+.content {
+    overflow-y: auto;
+    padding: 0 5px 50px 5px;
+}
+.content main {
+    margin-inline-start: auto;
+    margin-inline-end: auto;
+    max-width: var(--content-max-width);
+}
+.content p { line-height: 1.45em; }
+.content ol { line-height: 1.45em; }
+.content ul { line-height: 1.45em; }
+.content a { text-decoration: none; }
+.content a:hover { text-decoration: underline; }
+.content img, .content video { max-width: 100%; }
+.content .header:link,
+.content .header:visited {
+    color: var(--fg);
+}
+.content .header:link,
+.content .header:visited:hover {
+    text-decoration: none;
+}
+
+table {
+    margin: 0 auto;
+    border-collapse: collapse;
+}
+table td {
+    padding: 3px 20px;
+    border: 1px var(--table-border-color) solid;
+}
+table thead {
+    background: var(--table-header-bg);
+}
+table thead td {
+    font-weight: 700;
+    border: none;
+}
+table thead th {
+    padding: 3px 20px;
+}
+table thead tr {
+    border: 1px var(--table-header-bg) solid;
+}
+/* Alternate background colors for rows */
+table tbody tr:nth-child(2n) {
+    background: var(--table-alternate-bg);
+}
+
+
+blockquote {
+    margin: 20px 0;
+    padding: 0 20px;
+    color: var(--fg);
+    background-color: var(--quote-bg);
+    border-block-start: .1em solid var(--quote-border);
+    border-block-end: .1em solid var(--quote-border);
+}
+
+.warning {
+    margin: 20px;
+    padding: 0 20px;
+    border-inline-start: 2px solid var(--warning-border);
+}
+
+.warning:before {
+    position: absolute;
+    width: 3rem;
+    height: 3rem;
+    margin-inline-start: calc(-1.5rem - 21px);
+    content: "ⓘ";
+    text-align: center;
+    background-color: var(--bg);
+    color: var(--warning-border);
+    font-weight: bold;
+    font-size: 2rem;
+}
+
+blockquote .warning:before {
+    background-color: var(--quote-bg);
+}
+
+kbd {
+    background-color: var(--table-border-color);
+    border-radius: 4px;
+    border: solid 1px var(--theme-popup-border);
+    box-shadow: inset 0 -1px 0 var(--theme-hover);
+    display: inline-block;
+    font-size: var(--code-font-size);
+    font-family: var(--mono-font);
+    line-height: 10px;
+    padding: 4px 5px;
+    vertical-align: middle;
+}
+
+:not(.footnote-definition) + .footnote-definition,
+.footnote-definition + :not(.footnote-definition) {
+    margin-block-start: 2em;
+}
+.footnote-definition {
+    font-size: 0.9em;
+    margin: 0.5em 0;
+}
+.footnote-definition p {
+    display: inline;
+}
+
+.tooltiptext {
+    position: absolute;
+    visibility: hidden;
+    color: #fff;
+    background-color: #333;
+    transform: translateX(-50%); /* Center by moving tooltip 50% of its width left */
+    left: -8px; /* Half of the width of the icon */
+    top: -35px;
+    font-size: 0.8em;
+    text-align: center;
+    border-radius: 6px;
+    padding: 5px 8px;
+    margin: 5px;
+    z-index: 1000;
+}
+.tooltipped .tooltiptext {
+    visibility: visible;
+}
+
+.chapter li.part-title {
+    color: var(--sidebar-fg);
+    margin: 5px 0px;
+    font-weight: bold;
+}
+
+.result-no-output {
+    font-style: italic;
+}
diff --git a/book/theme/css/print.css b/book/theme/css/print.css
new file mode 100644
index 000000000..80ec3a544
--- /dev/null
+++ b/book/theme/css/print.css
@@ -0,0 +1,50 @@
+
+#sidebar,
+#menu-bar,
+.nav-chapters,
+.mobile-nav-chapters {
+    display: none;
+}
+
+#page-wrapper.page-wrapper {
+    transform: none !important;
+    margin-inline-start: 0px;
+    overflow-y: initial;
+}
+
+#content {
+    max-width: none;
+    margin: 0;
+    padding: 0;
+}
+
+.page {
+    overflow-y: initial;
+}
+
+code {
+    direction: ltr !important;
+}
+
+pre > .buttons {
+    z-index: 2;
+}
+
+a, a:visited, a:active, a:hover {
+    color: #4183c4;
+    text-decoration: none;
+}
+
+h1, h2, h3, h4, h5, h6 {
+    page-break-inside: avoid;
+    page-break-after: avoid;
+}
+
+pre, code {
+    page-break-inside: avoid;
+    white-space: pre-wrap;
+}
+
+.fa {
+    display: none !important;
+}
diff --git a/book/theme/css/variables.css b/book/theme/css/variables.css
new file mode 100644
index 000000000..0da55e8c9
--- /dev/null
+++ b/book/theme/css/variables.css
@@ -0,0 +1,279 @@
+
+/* Globals */
+
+:root {
+    --sidebar-width: 300px;
+    --sidebar-resize-indicator-width: 8px;
+    --sidebar-resize-indicator-space: 2px;
+    --page-padding: 15px;
+    --content-max-width: 750px;
+    --menu-bar-height: 50px;
+    --mono-font: "Source Code Pro", Consolas, "Ubuntu Mono", Menlo, "DejaVu Sans Mono", monospace, monospace;
+    --code-font-size: 0.875em /* please adjust the ace font size accordingly in editor.js */
+}
+
+/* Themes */
+
+.ayu {
+    --bg: hsl(210, 25%, 8%);
+    --fg: #c5c5c5;
+
+    --sidebar-bg: #14191f;
+    --sidebar-fg: #c8c9db;
+    --sidebar-non-existant: #5c6773;
+    --sidebar-active: #ffb454;
+    --sidebar-spacer: #2d334f;
+
+    --scrollbar: var(--sidebar-fg);
+
+    --icons: #737480;
+    --icons-hover: #b7b9cc;
+
+    --links: #0096cf;
+
+    --inline-code-color: #ffb454;
+
+    --theme-popup-bg: #14191f;
+    --theme-popup-border: #5c6773;
+    --theme-hover: #191f26;
+
+    --quote-bg: hsl(226, 15%, 17%);
+    --quote-border: hsl(226, 15%, 22%);
+
+    --warning-border: #ff8e00;
+
+    --table-border-color: hsl(210, 25%, 13%);
+    --table-header-bg: hsl(210, 25%, 28%);
+    --table-alternate-bg: hsl(210, 25%, 11%);
+
+    --searchbar-border-color: #848484;
+    --searchbar-bg: #424242;
+    --searchbar-fg: #fff;
+    --searchbar-shadow-color: #d4c89f;
+    --searchresults-header-fg: #666;
+    --searchresults-border-color: #888;
+    --searchresults-li-bg: #252932;
+    --search-mark-bg: #e3b171;
+
+    --color-scheme: dark;
+}
+
+.coal {
+    --bg: hsl(200, 7%, 8%);
+    --fg: #98a3ad;
+
+    --sidebar-bg: #292c2f;
+    --sidebar-fg: #a1adb8;
+    --sidebar-non-existant: #505254;
+    --sidebar-active: #3473ad;
+    --sidebar-spacer: #393939;
+
+    --scrollbar: var(--sidebar-fg);
+
+    --icons: #43484d;
+    --icons-hover: #b3c0cc;
+
+    --links: #2b79a2;
+
+    --inline-code-color: #c5c8c6;
+
+    --theme-popup-bg: #141617;
+    --theme-popup-border: #43484d;
+    --theme-hover: #1f2124;
+
+    --quote-bg: hsl(234, 21%, 18%);
+    --quote-border: hsl(234, 21%, 23%);
+
+    --warning-border: #ff8e00;
+
+    --table-border-color: hsl(200, 7%, 13%);
+    --table-header-bg: hsl(200, 7%, 28%);
+    --table-alternate-bg: hsl(200, 7%, 11%);
+
+    --searchbar-border-color: #aaa;
+    --searchbar-bg: #b7b7b7;
+    --searchbar-fg: #000;
+    --searchbar-shadow-color: #aaa;
+    --searchresults-header-fg: #666;
+    --searchresults-border-color: #98a3ad;
+    --searchresults-li-bg: #2b2b2f;
+    --search-mark-bg: #355c7d;
+
+    --color-scheme: dark;
+}
+
+.light {
+    --bg: hsl(0, 0%, 100%);
+    --fg: hsl(0, 0%, 0%);
+
+    --sidebar-bg: #fafafa;
+    --sidebar-fg: hsl(0, 0%, 0%);
+    --sidebar-non-existant: #aaaaaa;
+    --sidebar-active: #1f1fff;
+    --sidebar-spacer: #f4f4f4;
+
+    --scrollbar: #8F8F8F;
+
+    --icons: #747474;
+    --icons-hover: #000000;
+
+    --links: #20609f;
+
+    --inline-code-color: #301900;
+
+    --theme-popup-bg: #fafafa;
+    --theme-popup-border: #cccccc;
+    --theme-hover: #e6e6e6;
+
+    --quote-bg: hsl(197, 37%, 96%);
+    --quote-border: hsl(197, 37%, 91%);
+
+    --warning-border: #ff8e00;
+
+    --table-border-color: hsl(0, 0%, 95%);
+    --table-header-bg: hsl(0, 0%, 80%);
+    --table-alternate-bg: hsl(0, 0%, 97%);
+
+    --searchbar-border-color: #aaa;
+    --searchbar-bg: #fafafa;
+    --searchbar-fg: #000;
+    --searchbar-shadow-color: #aaa;
+    --searchresults-header-fg: #666;
+    --searchresults-border-color: #888;
+    --searchresults-li-bg: #e4f2fe;
+    --search-mark-bg: #a2cff5;
+
+    --color-scheme: light;
+}
+
+.navy {
+    --bg: hsl(226, 23%, 11%);
+    --fg: #bcbdd0;
+
+    --sidebar-bg: #282d3f;
+    --sidebar-fg: #c8c9db;
+    --sidebar-non-existant: #505274;
+    --sidebar-active: #2b79a2;
+    --sidebar-spacer: #2d334f;
+
+    --scrollbar: var(--sidebar-fg);
+
+    --icons: #737480;
+    --icons-hover: #b7b9cc;
+
+    --links: #2b79a2;
+
+    --inline-code-color: #c5c8c6;
+
+    --theme-popup-bg: #161923;
+    --theme-popup-border: #737480;
+    --theme-hover: #282e40;
+
+    --quote-bg: hsl(226, 15%, 17%);
+    --quote-border: hsl(226, 15%, 22%);
+
+    --warning-border: #ff8e00;
+
+    --table-border-color: hsl(226, 23%, 16%);
+    --table-header-bg: hsl(226, 23%, 31%);
+    --table-alternate-bg: hsl(226, 23%, 14%);
+
+    --searchbar-border-color: #aaa;
+    --searchbar-bg: #aeaec6;
+    --searchbar-fg: #000;
+    --searchbar-shadow-color: #aaa;
+    --searchresults-header-fg: #5f5f71;
+    --searchresults-border-color: #5c5c68;
+    --searchresults-li-bg: #242430;
+    --search-mark-bg: #a2cff5;
+
+    --color-scheme: dark;
+}
+
+.rust {
+    --bg: hsl(60, 9%, 87%);
+    --fg: #262625;
+
+    --sidebar-bg: #3b2e2a;
+    --sidebar-fg: #c8c9db;
+    --sidebar-non-existant: #505254;
+    --sidebar-active: #e69f67;
+    --sidebar-spacer: #45373a;
+
+    --scrollbar: var(--sidebar-fg);
+
+    --icons: #737480;
+    --icons-hover: #262625;
+
+    --links: #2b79a2;
+
+    --inline-code-color: #6e6b5e;
+
+    --theme-popup-bg: #e1e1db;
+    --theme-popup-border: #b38f6b;
+    --theme-hover: #99908a;
+
+    --quote-bg: hsl(60, 5%, 75%);
+    --quote-border: hsl(60, 5%, 70%);
+
+    --warning-border: #ff8e00;
+
+    --table-border-color: hsl(60, 9%, 82%);
+    --table-header-bg: #b3a497;
+    --table-alternate-bg: hsl(60, 9%, 84%);
+
+    --searchbar-border-color: #aaa;
+    --searchbar-bg: #fafafa;
+    --searchbar-fg: #000;
+    --searchbar-shadow-color: #aaa;
+    --searchresults-header-fg: #666;
+    --searchresults-border-color: #888;
+    --searchresults-li-bg: #dec2a2;
+    --search-mark-bg: #e69f67;
+
+    --color-scheme: light;
+}
+
+@media (prefers-color-scheme: dark) {
+    .light.no-js {
+        --bg: hsl(200, 7%, 8%);
+        --fg: #98a3ad;
+
+        --sidebar-bg: #292c2f;
+        --sidebar-fg: #a1adb8;
+        --sidebar-non-existant: #505254;
+        --sidebar-active: #3473ad;
+        --sidebar-spacer: #393939;
+
+        --scrollbar: var(--sidebar-fg);
+
+        --icons: #43484d;
+        --icons-hover: #b3c0cc;
+
+        --links: #2b79a2;
+
+        --inline-code-color: #c5c8c6;
+
+        --theme-popup-bg: #141617;
+        --theme-popup-border: #43484d;
+        --theme-hover: #1f2124;
+
+        --quote-bg: hsl(234, 21%, 18%);
+        --quote-border: hsl(234, 21%, 23%);
+
+        --warning-border: #ff8e00;
+
+        --table-border-color: hsl(200, 7%, 13%);
+        --table-header-bg: hsl(200, 7%, 28%);
+        --table-alternate-bg: hsl(200, 7%, 11%);
+
+        --searchbar-border-color: #aaa;
+        --searchbar-bg: #b7b7b7;
+        --searchbar-fg: #000;
+        --searchbar-shadow-color: #aaa;
+        --searchresults-header-fg: #666;
+        --searchresults-border-color: #98a3ad;
+        --searchresults-li-bg: #2b2b2f;
+        --search-mark-bg: #355c7d;
+    }
+}
diff --git a/book/theme/favicon.png b/book/theme/favicon.png
new file mode 100644
index 000000000..a5b1aa16c
Binary files /dev/null and b/book/theme/favicon.png differ
diff --git a/book/theme/favicon.svg b/book/theme/favicon.svg
new file mode 100644
index 000000000..90e0ea58b
--- /dev/null
+++ b/book/theme/favicon.svg
@@ -0,0 +1,22 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 199.7 184.2">
+  <style>
+    @media (prefers-color-scheme: dark) {
+      svg { fill: white; }
+    }
+  </style>
+<path d="M189.5,36.8c0.2,2.8,0,5.1-0.6,6.8L153,162c-0.6,2.1-2,3.7-4.2,5c-2.2,1.2-4.4,1.9-6.7,1.9H31.4c-9.6,0-15.3-2.8-17.3-8.4
+  c-0.8-2.2-0.8-3.9,0.1-5.2c0.9-1.2,2.4-1.8,4.6-1.8H123c7.4,0,12.6-1.4,15.4-4.1s5.7-8.9,8.6-18.4l32.9-108.6
+  c1.8-5.9,1-11.1-2.2-15.6S169.9,0,164,0H72.7c-1,0-3.1,0.4-6.1,1.1l0.1-0.4C64.5,0.2,62.6,0,61,0.1s-3,0.5-4.3,1.4
+  c-1.3,0.9-2.4,1.8-3.2,2.8S52,6.5,51.2,8.1c-0.8,1.6-1.4,3-1.9,4.3s-1.1,2.7-1.8,4.2c-0.7,1.5-1.3,2.7-2,3.7c-0.5,0.6-1.2,1.5-2,2.5
+  s-1.6,2-2.2,2.8s-0.9,1.5-1.1,2.2c-0.2,0.7-0.1,1.8,0.2,3.2c0.3,1.4,0.4,2.4,0.4,3.1c-0.3,3-1.4,6.9-3.3,11.6
+  c-1.9,4.7-3.6,8.1-5.1,10.1c-0.3,0.4-1.2,1.3-2.6,2.7c-1.4,1.4-2.3,2.6-2.6,3.7c-0.3,0.4-0.3,1.5-0.1,3.4c0.3,1.8,0.4,3.1,0.3,3.8
+  c-0.3,2.7-1.3,6.3-3,10.8c-1.7,4.5-3.4,8.2-5,11c-0.2,0.5-0.9,1.4-2,2.8c-1.1,1.4-1.8,2.5-2,3.4c-0.2,0.6-0.1,1.8,0.1,3.4
+  c0.2,1.6,0.2,2.8-0.1,3.6c-0.6,3-1.8,6.7-3.6,11c-1.8,4.3-3.6,7.9-5.4,11c-0.5,0.8-1.1,1.7-2,2.8c-0.8,1.1-1.5,2-2,2.8
+  s-0.8,1.6-1,2.5c-0.1,0.5,0,1.3,0.4,2.3c0.3,1.1,0.4,1.9,0.4,2.6c-0.1,1.1-0.2,2.6-0.5,4.4c-0.2,1.8-0.4,2.9-0.4,3.2
+  c-1.8,4.8-1.7,9.9,0.2,15.2c2.2,6.2,6.2,11.5,11.9,15.8c5.7,4.3,11.7,6.4,17.8,6.4h110.7c5.2,0,10.1-1.7,14.7-5.2s7.7-7.8,9.2-12.9
+  l33-108.6c1.8-5.8,1-10.9-2.2-15.5C194.9,39.7,192.6,38,189.5,36.8z M59.6,122.8L73.8,80c0,0,7,0,10.8,0s28.8-1.7,25.4,17.5
+  c-3.4,19.2-18.8,25.2-36.8,25.4S59.6,122.8,59.6,122.8z M78.6,116.8c4.7-0.1,18.9-2.9,22.1-17.1S89.2,86.3,89.2,86.3l-8.9,0
+  l-10.2,30.5C70.2,116.9,74,116.9,78.6,116.8z M75.3,68.7L89,26.2h9.8l0.8,34l23.6-34h9.9l-13.6,42.5h-7.1l12.5-35.4l-24.5,35.4h-6.8
+  l-0.8-35L82,68.7H75.3z"/>
+</svg>
+<!-- Original image Copyright Dave Gandy — CC BY 4.0 License -->
diff --git a/book/theme/fonts/OPEN-SANS-LICENSE.txt b/book/theme/fonts/OPEN-SANS-LICENSE.txt
new file mode 100644
index 000000000..d64569567
--- /dev/null
+++ b/book/theme/fonts/OPEN-SANS-LICENSE.txt
@@ -0,0 +1,202 @@
+
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diff --git a/book/theme/fonts/SOURCE-CODE-PRO-LICENSE.txt b/book/theme/fonts/SOURCE-CODE-PRO-LICENSE.txt
new file mode 100644
index 000000000..366206f54
--- /dev/null
+++ b/book/theme/fonts/SOURCE-CODE-PRO-LICENSE.txt
@@ -0,0 +1,93 @@
+Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/book/theme/fonts/fonts.css b/book/theme/fonts/fonts.css
new file mode 100644
index 000000000..858efa598
--- /dev/null
+++ b/book/theme/fonts/fonts.css
@@ -0,0 +1,100 @@
+/* Open Sans is licensed under the Apache License, Version 2.0. See http://www.apache.org/licenses/LICENSE-2.0 */
+/* Source Code Pro is under the Open Font License. See https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL */
+
+/* open-sans-300 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 300;
+  src: local('Open Sans Light'), local('OpenSans-Light'),
+       url('open-sans-v17-all-charsets-300.woff2') format('woff2');
+}
+
+/* open-sans-300italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: italic;
+  font-weight: 300;
+  src: local('Open Sans Light Italic'), local('OpenSans-LightItalic'),
+       url('open-sans-v17-all-charsets-300italic.woff2') format('woff2');
+}
+
+/* open-sans-regular - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Open Sans Regular'), local('OpenSans-Regular'),
+       url('open-sans-v17-all-charsets-regular.woff2') format('woff2');
+}
+
+/* open-sans-italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: italic;
+  font-weight: 400;
+  src: local('Open Sans Italic'), local('OpenSans-Italic'),
+       url('open-sans-v17-all-charsets-italic.woff2') format('woff2');
+}
+
+/* open-sans-600 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 600;
+  src: local('Open Sans SemiBold'), local('OpenSans-SemiBold'),
+       url('open-sans-v17-all-charsets-600.woff2') format('woff2');
+}
+
+/* open-sans-600italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: italic;
+  font-weight: 600;
+  src: local('Open Sans SemiBold Italic'), local('OpenSans-SemiBoldItalic'),
+       url('open-sans-v17-all-charsets-600italic.woff2') format('woff2');
+}
+
+/* open-sans-700 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 700;
+  src: local('Open Sans Bold'), local('OpenSans-Bold'),
+       url('open-sans-v17-all-charsets-700.woff2') format('woff2');
+}
+
+/* open-sans-700italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: italic;
+  font-weight: 700;
+  src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'),
+       url('open-sans-v17-all-charsets-700italic.woff2') format('woff2');
+}
+
+/* open-sans-800 - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 800;
+  src: local('Open Sans ExtraBold'), local('OpenSans-ExtraBold'),
+       url('open-sans-v17-all-charsets-800.woff2') format('woff2');
+}
+
+/* open-sans-800italic - latin_vietnamese_latin-ext_greek-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Open Sans';
+  font-style: italic;
+  font-weight: 800;
+  src: local('Open Sans ExtraBold Italic'), local('OpenSans-ExtraBoldItalic'),
+       url('open-sans-v17-all-charsets-800italic.woff2') format('woff2');
+}
+
+/* source-code-pro-500 - latin_vietnamese_latin-ext_greek_cyrillic-ext_cyrillic */
+@font-face {
+  font-family: 'Source Code Pro';
+  font-style: normal;
+  font-weight: 500;
+  src: url('source-code-pro-v11-all-charsets-500.woff2') format('woff2');
+}
diff --git a/book/theme/fonts/open-sans-v17-all-charsets-300.woff2 b/book/theme/fonts/open-sans-v17-all-charsets-300.woff2
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diff --git a/book/theme/fonts/open-sans-v17-all-charsets-italic.woff2 b/book/theme/fonts/open-sans-v17-all-charsets-italic.woff2
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diff --git a/book/theme/fonts/source-code-pro-v11-all-charsets-500.woff2 b/book/theme/fonts/source-code-pro-v11-all-charsets-500.woff2
new file mode 100644
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diff --git a/book/theme/fstar.js b/book/theme/fstar.js
new file mode 100644
index 000000000..5b1c6ba37
--- /dev/null
+++ b/book/theme/fstar.js
@@ -0,0 +1,82 @@
+/*! `ocaml` grammar compiled for Highlight.js 11.10.0 */
+  (function(){
+    var hljsGrammar = (function () {
+  'use strict';
+
+  function fstar(hljs) {
+    /* missing support for heredoc-like string (OCaml 4.0.2+) */
+    return {
+        name: 'FStar',
+        aliases: [ 'fstar', 'fst', 'fsti' ],
+      keywords: {
+        $pattern: '[a-z_]\\w*!?',
+        keyword: 'attributes noeq unopteq and assert assume begin by calc class default decreases effect eliminate else end ensures exception exists false friend forall fun λ function if in include inline inline_for_extraction instance introduce irreducible let logic match returns as module new new_effect layered_effect polymonadic_bind polymonadic_subcomp noextract of open opaque private quote range_of rec reifiable reify reflectable requires set_range_of sub_effect synth then total true try type unfold unfoldable val when with string',
+        built_in: 'unit',
+        literal: 'true false'
+      },
+      // illegal: /\/\/|>>/,
+      contains: [
+        {
+          className: 'literal',
+          begin: '\\[(\\|\\|)?\\]|\\(\\)',
+          relevance: 0
+        },
+        hljs.COMMENT(
+          '\\(\\*',
+          '\\*\\)',
+          { contains: [ 'self' ] }
+        ),
+        //   hljs.inherit(
+        //       hljs.COMMENT(),
+        //       {
+        //           match: [
+        //               /(^|\s)/,
+        //               /\/\/.*$/
+        //           ],
+        //           scope: {
+        //               2: 'comment'
+        //           }
+        //       }
+        //   ),
+        { /* type variable */
+          className: 'symbol',
+          begin: '\'[A-Za-z_](?!\')[\\w\']*'
+          /* the grammar is ambiguous on how 'a'b should be interpreted but not the compiler */
+        },
+        { /* module or constructor */
+          className: 'type',
+          begin: '\\b[A-Z][\\w\']*',
+          relevance: 0
+        },
+        { /* don't color identifiers, but safely catch all identifiers with ' */
+          begin: '[a-z_]\\w*\'[\\w\']*',
+          relevance: 0
+        },
+        hljs.inherit(hljs.APOS_STRING_MODE, {
+          className: 'string',
+          relevance: 0
+        }),
+        hljs.inherit(hljs.QUOTE_STRING_MODE, { illegal: null }),
+        {
+          className: 'number',
+          begin:
+            '\\b(0[xX][a-fA-F0-9_]+[Lln]?|'
+            + '0[oO][0-7_]+[Lln]?|'
+            + '0[bB][01_]+[Lln]?|'
+            + '[0-9][0-9_]*([Lln]|(\\.[0-9_]*)?([eE][-+]?[0-9_]+)?)?)',
+          relevance: 0
+        },
+        { begin: /->/ // relevance booster
+        }
+      ]
+    };
+  }
+
+  return fstar;
+
+})();
+    hljs.registerLanguage('fstar', hljsGrammar);
+  })();
+
+// hljs.initHighlightingOnLoad();
+
diff --git a/book/theme/highlight.css b/book/theme/highlight.css
new file mode 100644
index 000000000..ba57b82b2
--- /dev/null
+++ b/book/theme/highlight.css
@@ -0,0 +1,82 @@
+/*
+ * An increased contrast highlighting scheme loosely based on the
+ * "Base16 Atelier Dune Light" theme by Bram de Haan
+ * (http://atelierbram.github.io/syntax-highlighting/atelier-schemes/dune)
+ * Original Base16 color scheme by Chris Kempson
+ * (https://github.com/chriskempson/base16)
+ */
+
+/* Comment */
+.hljs-comment,
+.hljs-quote {
+  color: #575757;
+}
+
+/* Red */
+.hljs-variable,
+.hljs-template-variable,
+.hljs-attribute,
+.hljs-tag,
+.hljs-name,
+.hljs-regexp,
+.hljs-link,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class {
+  color: #d70025;
+}
+
+/* Orange */
+.hljs-number,
+.hljs-meta,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-literal,
+.hljs-type,
+.hljs-params {
+  color: #b21e00;
+}
+
+/* Green */
+.hljs-string,
+.hljs-symbol,
+.hljs-bullet {
+  color: #008200;
+}
+
+/* Blue */
+.hljs-title,
+.hljs-section {
+  color: #0030f2;
+}
+
+/* Purple */
+.hljs-keyword,
+.hljs-selector-tag {
+  color: #9d00ec;
+}
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  background: #f6f7f6;
+  color: #000;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}
+
+.hljs-addition {
+  color: #22863a;
+  background-color: #f0fff4;
+}
+
+.hljs-deletion {
+  color: #b31d28;
+  background-color: #ffeef0;
+}
diff --git a/book/theme/highlight.css.old b/book/theme/highlight.css.old
new file mode 100644
index 000000000..ba57b82b2
--- /dev/null
+++ b/book/theme/highlight.css.old
@@ -0,0 +1,82 @@
+/*
+ * An increased contrast highlighting scheme loosely based on the
+ * "Base16 Atelier Dune Light" theme by Bram de Haan
+ * (http://atelierbram.github.io/syntax-highlighting/atelier-schemes/dune)
+ * Original Base16 color scheme by Chris Kempson
+ * (https://github.com/chriskempson/base16)
+ */
+
+/* Comment */
+.hljs-comment,
+.hljs-quote {
+  color: #575757;
+}
+
+/* Red */
+.hljs-variable,
+.hljs-template-variable,
+.hljs-attribute,
+.hljs-tag,
+.hljs-name,
+.hljs-regexp,
+.hljs-link,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class {
+  color: #d70025;
+}
+
+/* Orange */
+.hljs-number,
+.hljs-meta,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-literal,
+.hljs-type,
+.hljs-params {
+  color: #b21e00;
+}
+
+/* Green */
+.hljs-string,
+.hljs-symbol,
+.hljs-bullet {
+  color: #008200;
+}
+
+/* Blue */
+.hljs-title,
+.hljs-section {
+  color: #0030f2;
+}
+
+/* Purple */
+.hljs-keyword,
+.hljs-selector-tag {
+  color: #9d00ec;
+}
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  background: #f6f7f6;
+  color: #000;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}
+
+.hljs-addition {
+  color: #22863a;
+  background-color: #f0fff4;
+}
+
+.hljs-deletion {
+  color: #b31d28;
+  background-color: #ffeef0;
+}
diff --git a/book/theme/highlight.js b/book/theme/highlight.js
new file mode 100644
index 000000000..3256c00ed
--- /dev/null
+++ b/book/theme/highlight.js
@@ -0,0 +1,53 @@
+/*
+  Highlight.js 10.1.1 (93fd0d73)
+  License: BSD-3-Clause
+  Copyright (c) 2006-2020, Ivan Sagalaev
+*/
+var hljs=function(){"use strict";function e(n){Object.freeze(n);var t="function"==typeof n;return Object.getOwnPropertyNames(n).forEach((function(r){!Object.hasOwnProperty.call(n,r)||null===n[r]||"object"!=typeof n[r]&&"function"!=typeof n[r]||t&&("caller"===r||"callee"===r||"arguments"===r)||Object.isFrozen(n[r])||e(n[r])})),n}class n{constructor(e){void 0===e.data&&(e.data={}),this.data=e.data}ignoreMatch(){this.ignore=!0}}function t(e){return e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;").replace(/'/g,"&#x27;")}function r(e,...n){var t={};for(const n in e)t[n]=e[n];return n.forEach((function(e){for(const n in e)t[n]=e[n]})),t}function a(e){return e.nodeName.toLowerCase()}var i=Object.freeze({__proto__:null,escapeHTML:t,inherit:r,nodeStream:function(e){var n=[];return function e(t,r){for(var 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vpcomb vpcomd vpcomq vpcomub vpcomud vpcomuq vpcomuw vpcomw vphaddbd vphaddbq vphaddbw vphadddq vphaddubd vphaddubq vphaddubw vphaddudq vphadduwd vphadduwq vphaddwd vphaddwq vphsubbw vphsubdq vphsubwd vpmacsdd vpmacsdqh vpmacsdql vpmacssdd vpmacssdqh vpmacssdql vpmacsswd vpmacssww vpmacswd vpmacsww vpmadcsswd vpmadcswd vpperm vprotb vprotd vprotq vprotw vpshab vpshad vpshaq vpshaw vpshlb vpshld vpshlq vpshlw vbroadcasti128 vpblendd vpbroadcastb vpbroadcastw vpbroadcastd vpbroadcastq vpermd vpermpd vpermps vpermq vperm2i128 vextracti128 vinserti128 vpmaskmovd vpmaskmovq vpsllvd vpsllvq vpsravd vpsrlvd vpsrlvq vgatherdpd vgatherqpd vgatherdps vgatherqps vpgatherdd vpgatherqd vpgatherdq vpgatherqq xabort xbegin xend xtest andn bextr blci blcic blsi blsic blcfill blsfill blcmsk blsmsk blsr blcs bzhi mulx pdep pext rorx sarx shlx shrx tzcnt tzmsk t1mskc valignd valignq vblendmpd vblendmps vbroadcastf32x4 vbroadcastf64x4 vbroadcasti32x4 vbroadcasti64x4 vcompresspd vcompressps vcvtpd2udq 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vpmovusqd vpmovusqw vpord vporq vprold vprolq vprolvd vprolvq vprord vprorq vprorvd vprorvq vpscatterdd vpscatterdq vpscatterqd vpscatterqq vpsraq vpsravq vpternlogd vpternlogq vptestmd vptestmq vptestnmd vptestnmq vpxord vpxorq vrcp14pd vrcp14ps vrcp14sd vrcp14ss vrndscalepd vrndscaleps vrndscalesd vrndscaless vrsqrt14pd vrsqrt14ps vrsqrt14sd vrsqrt14ss vscalefpd vscalefps vscalefsd vscalefss vscatterdpd vscatterdps vscatterqpd vscatterqps vshuff32x4 vshuff64x2 vshufi32x4 vshufi64x2 kandnw kandw kmovw knotw kortestw korw kshiftlw kshiftrw kunpckbw kxnorw kxorw vpbroadcastmb2q vpbroadcastmw2d vpconflictd vpconflictq vplzcntd vplzcntq vexp2pd vexp2ps vrcp28pd vrcp28ps vrcp28sd vrcp28ss vrsqrt28pd vrsqrt28ps vrsqrt28sd vrsqrt28ss vgatherpf0dpd vgatherpf0dps vgatherpf0qpd vgatherpf0qps vgatherpf1dpd vgatherpf1dps vgatherpf1qpd vgatherpf1qps vscatterpf0dpd vscatterpf0dps vscatterpf0qpd vscatterpf0qps vscatterpf1dpd vscatterpf1dps vscatterpf1qpd vscatterpf1qps prefetchwt1 bndmk bndcl bndcu 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\ No newline at end of file
diff --git a/book/theme/index.hbs b/book/theme/index.hbs
new file mode 100644
index 000000000..080b78516
--- /dev/null
+++ b/book/theme/index.hbs
@@ -0,0 +1,346 @@
+<!DOCTYPE HTML>
+<html lang="{{ language }}" class="{{ default_theme }}" dir="{{ text_direction }}">
+    <head>
+        <!-- Book generated using mdBook -->
+        <meta charset="UTF-8">
+        <title>{{ title }}</title>
+        {{#if is_print }}
+        <meta name="robots" content="noindex">
+        {{/if}}
+        {{#if base_url}}
+        <base href="{{ base_url }}">
+        {{/if}}
+
+
+        <!-- Custom HTML head -->
+        {{> head}}
+
+        <meta name="description" content="{{ description }}">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <meta name="theme-color" content="#ffffff">
+
+        {{#if favicon_svg}}
+        <link rel="icon" href="{{ path_to_root }}favicon.svg">
+        {{/if}}
+        {{#if favicon_png}}
+        <link rel="shortcut icon" href="{{ path_to_root }}favicon.png">
+        {{/if}}
+        <link rel="stylesheet" href="{{ path_to_root }}css/variables.css">
+        <link rel="stylesheet" href="{{ path_to_root }}css/general.css">
+        <link rel="stylesheet" href="{{ path_to_root }}css/chrome.css">
+        {{#if print_enable}}
+        <link rel="stylesheet" href="{{ path_to_root }}css/print.css" media="print">
+        {{/if}}
+
+        <!-- Fonts -->
+        <link rel="stylesheet" href="{{ path_to_root }}FontAwesome/css/font-awesome.css">
+        {{#if copy_fonts}}
+        <link rel="stylesheet" href="{{ path_to_root }}fonts/fonts.css">
+        {{/if}}
+
+        <!-- Highlight.js Stylesheets -->
+        <link rel="stylesheet" href="{{ path_to_root }}highlight.css">
+        <link rel="stylesheet" href="{{ path_to_root }}tomorrow-night.css">
+        <link rel="stylesheet" href="{{ path_to_root }}ayu-highlight.css">
+
+        <!-- Custom theme stylesheets -->
+        {{#each additional_css}}
+        <link rel="stylesheet" href="{{ ../path_to_root }}{{ this }}">
+        {{/each}}
+
+        {{#if mathjax_support}}
+        <!-- MathJax -->
+        <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+        {{/if}}
+    </head>
+    <body class="sidebar-visible no-js">
+    <div id="body-container">
+        <!-- Provide site root to javascript -->
+        <script>
+            var path_to_root = "{{ path_to_root }}";
+            var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "{{ preferred_dark_theme }}" : "{{ default_theme }}";
+        </script>
+
+        <!-- Work around some values being stored in localStorage wrapped in quotes -->
+        <script>
+            try {
+                var theme = localStorage.getItem('mdbook-theme');
+                var sidebar = localStorage.getItem('mdbook-sidebar');
+
+                if (theme.startsWith('"') && theme.endsWith('"')) {
+                    localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
+                }
+
+                if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
+                    localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
+                }
+            } catch (e) { }
+        </script>
+
+        <!-- Set the theme before any content is loaded, prevents flash -->
+        <script>
+            var theme;
+            try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
+            if (theme === null || theme === undefined) { theme = default_theme; }
+            var html = document.querySelector('html');
+            html.classList.remove('{{ default_theme }}')
+            html.classList.add(theme);
+            var body = document.querySelector('body');
+            body.classList.remove('no-js')
+            body.classList.add('js');
+        </script>
+
+        <input type="checkbox" id="sidebar-toggle-anchor" class="hidden">
+
+        <!-- Hide / unhide sidebar before it is displayed -->
+        <script>
+            var body = document.querySelector('body');
+            var sidebar = null;
+            var sidebar_toggle = document.getElementById("sidebar-toggle-anchor");
+            if (document.body.clientWidth >= 1080) {
+                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
+                sidebar = sidebar || 'visible';
+            } else {
+                sidebar = 'hidden';
+            }
+            sidebar_toggle.checked = sidebar === 'visible';
+            body.classList.remove('sidebar-visible');
+            body.classList.add("sidebar-" + sidebar);
+        </script>
+
+        <nav id="sidebar" class="sidebar" aria-label="Table of contents">
+            <div class="sidebar-scrollbox">
+                {{#toc}}{{/toc}}
+            </div>
+            <div id="sidebar-resize-handle" class="sidebar-resize-handle">
+                <div class="sidebar-resize-indicator"></div>
+            </div>
+        </nav>
+
+        <!-- Track and set sidebar scroll position -->
+        <script>
+            var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
+            sidebarScrollbox.addEventListener('click', function(e) {
+                if (e.target.tagName === 'A') {
+                    sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
+                }
+            }, { passive: true });
+            var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
+            sessionStorage.removeItem('sidebar-scroll');
+            if (sidebarScrollTop) {
+                // preserve sidebar scroll position when navigating via links within sidebar
+                sidebarScrollbox.scrollTop = sidebarScrollTop;
+            } else {
+                // scroll sidebar to current active section when navigating via "next/previous chapter" buttons
+                var activeSection = document.querySelector('#sidebar .active');
+                if (activeSection) {
+                    activeSection.scrollIntoView({ block: 'center' });
+                }
+            }
+        </script>
+
+        <div id="page-wrapper" class="page-wrapper">
+
+            <div class="page">
+                {{> header}}
+                <div id="menu-bar-hover-placeholder"></div>
+                <div id="menu-bar" class="menu-bar sticky">
+                    <div class="left-buttons">
+                        <label id="sidebar-toggle" class="icon-button" for="sidebar-toggle-anchor" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
+                            <i class="fa fa-bars"></i>
+                        </label>
+                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
+                            <i class="fa fa-paint-brush"></i>
+                        </button>
+                        <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
+                            <li role="none"><button role="menuitem" class="theme" id="light">Light</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
+                            <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
+                        </ul>
+                        {{#if search_enabled}}
+                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
+                            <i class="fa fa-search"></i>
+                        </button>
+                        {{/if}}
+                    </div>
+
+                    <h1 class="menu-title">{{ book_title }}</h1>
+
+                    <div class="right-buttons">
+                        {{#if print_enable}}
+                        <a href="{{ path_to_root }}print.html" title="Print this book" aria-label="Print this book">
+                            <i id="print-button" class="fa fa-print"></i>
+                        </a>
+                        {{/if}}
+                        {{#if git_repository_url}}
+                        <a href="{{git_repository_url}}" title="Git repository" aria-label="Git repository">
+                            <i id="git-repository-button" class="fa {{git_repository_icon}}"></i>
+                        </a>
+                        {{/if}}
+                        {{#if git_repository_edit_url}}
+                        <a href="{{git_repository_edit_url}}" title="Suggest an edit" aria-label="Suggest an edit">
+                            <i id="git-edit-button" class="fa fa-edit"></i>
+                        </a>
+                        {{/if}}
+
+                    </div>
+                </div>
+
+                {{#if search_enabled}}
+                <div id="search-wrapper" class="hidden">
+                    <form id="searchbar-outer" class="searchbar-outer">
+                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
+                    </form>
+                    <div id="searchresults-outer" class="searchresults-outer hidden">
+                        <div id="searchresults-header" class="searchresults-header"></div>
+                        <ul id="searchresults">
+                        </ul>
+                    </div>
+                </div>
+                {{/if}}
+
+                <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
+                <script>
+                    document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
+                    document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
+                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
+                        link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
+                    });
+                </script>
+
+                <div id="content" class="content">
+                    <main>
+                        {{{ content }}}
+                    </main>
+
+                    <nav class="nav-wrapper" aria-label="Page navigation">
+                        <!-- Mobile navigation buttons -->
+                        {{#previous}}
+                            <a rel="prev" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                                <i class="fa fa-angle-left"></i>
+                            </a>
+                        {{/previous}}
+
+                        {{#next}}
+                            <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                                <i class="fa fa-angle-right"></i>
+                            </a>
+                        {{/next}}
+
+                        <div style="clear: both"></div>
+                    </nav>
+                </div>
+            </div>
+
+            <nav class="nav-wide-wrapper" aria-label="Page navigation">
+                {{#previous}}
+                    <a rel="prev" href="{{ path_to_root }}{{link}}" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
+                        <i class="fa fa-angle-left"></i>
+                    </a>
+                {{/previous}}
+
+                {{#next}}
+                    <a rel="next prefetch" href="{{ path_to_root }}{{link}}" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
+                        <i class="fa fa-angle-right"></i>
+                    </a>
+                {{/next}}
+            </nav>
+
+        </div>
+
+        {{#if live_reload_endpoint}}
+        <!-- Livereload script (if served using the cli tool) -->
+        <script>
+            const wsProtocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
+            const wsAddress = wsProtocol + "//" + location.host + "/" + "{{{live_reload_endpoint}}}";
+            const socket = new WebSocket(wsAddress);
+            socket.onmessage = function (event) {
+                if (event.data === "reload") {
+                    socket.close();
+                    location.reload();
+                }
+            };
+
+            window.onbeforeunload = function() {
+                socket.close();
+            }
+        </script>
+        {{/if}}
+
+        {{#if google_analytics}}
+        <!-- Google Analytics Tag -->
+        <script>
+            var localAddrs = ["localhost", "127.0.0.1", ""];
+
+            // make sure we don't activate google analytics if the developer is
+            // inspecting the book locally...
+            if (localAddrs.indexOf(document.location.hostname) === -1) {
+                (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+                })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+
+                ga('create', '{{google_analytics}}', 'auto');
+                ga('send', 'pageview');
+            }
+        </script>
+        {{/if}}
+
+        {{#if playground_line_numbers}}
+        <script>
+            window.playground_line_numbers = true;
+        </script>
+        {{/if}}
+
+        {{#if playground_copyable}}
+        <script>
+            window.playground_copyable = true;
+        </script>
+        {{/if}}
+
+        {{#if playground_js}}
+        <script src="{{ path_to_root }}ace.js"></script>
+        <script src="{{ path_to_root }}editor.js"></script>
+        <script src="{{ path_to_root }}mode-rust.js"></script>
+        <script src="{{ path_to_root }}theme-dawn.js"></script>
+        <script src="{{ path_to_root }}theme-tomorrow_night.js"></script>
+        {{/if}}
+
+        {{#if search_js}}
+        <script src="{{ path_to_root }}elasticlunr.min.js"></script>
+        <script src="{{ path_to_root }}mark.min.js"></script>
+        <script src="{{ path_to_root }}searcher.js"></script>
+        {{/if}}
+
+        <script src="{{ path_to_root }}clipboard.min.js"></script>
+        <script src="{{ path_to_root }}highlight.js"></script>
+        <script src="{{ path_to_root }}book.js"></script>
+
+        <!-- Custom JS scripts -->
+        {{#each additional_js}}
+        <script src="{{ ../path_to_root }}{{this}}"></script>
+        {{/each}}
+
+        {{#if is_print}}
+        {{#if mathjax_support}}
+        <script>
+        window.addEventListener('load', function() {
+            MathJax.Hub.Register.StartupHook('End', function() {
+                window.setTimeout(window.print, 100);
+            });
+        });
+        </script>
+        {{else}}
+        <script>
+        window.addEventListener('load', function() {
+            window.setTimeout(window.print, 100);
+        });
+        </script>
+        {{/if}}
+        {{/if}}
+
+    </div>
+    </body>
+</html>
diff --git a/book/theme/lz-string.js b/book/theme/lz-string.js
new file mode 100644
index 000000000..534b61ff6
--- /dev/null
+++ b/book/theme/lz-string.js
@@ -0,0 +1 @@
+var LZString=function(){var r=String.fromCharCode,o="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",n="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-$",e={};function t(r,o){if(!e[r]){e[r]={};for(var n=0;n<r.length;n++)e[r][r.charAt(n)]=n}return e[r][o]}var i={compressToBase64:function(r){if(null==r)return"";var n=i._compress(r,6,function(r){return o.charAt(r)});switch(n.length%4){default:case 0:return n;case 1:return n+"===";case 2:return n+"==";case 3:return n+"="}},decompressFromBase64:function(r){return null==r?"":""==r?null:i._decompress(r.length,32,function(n){return t(o,r.charAt(n))})},compressToUTF16:function(o){return null==o?"":i._compress(o,15,function(o){return r(o+32)})+" "},decompressFromUTF16:function(r){return null==r?"":""==r?null:i._decompress(r.length,16384,function(o){return r.charCodeAt(o)-32})},compressToUint8Array:function(r){for(var o=i.compress(r),n=new Uint8Array(2*o.length),e=0,t=o.length;e<t;e++){var s=o.charCodeAt(e);n[2*e]=s>>>8,n[2*e+1]=s%256}return n},decompressFromUint8Array:function(o){if(null==o)return i.decompress(o);for(var n=new Array(o.length/2),e=0,t=n.length;e<t;e++)n[e]=256*o[2*e]+o[2*e+1];var s=[];return n.forEach(function(o){s.push(r(o))}),i.decompress(s.join(""))},compressToEncodedURIComponent:function(r){return null==r?"":i._compress(r,6,function(r){return n.charAt(r)})},decompressFromEncodedURIComponent:function(r){return null==r?"":""==r?null:(r=r.replace(/ /g,"+"),i._decompress(r.length,32,function(o){return t(n,r.charAt(o))}))},compress:function(o){return i._compress(o,16,function(o){return r(o)})},_compress:function(r,o,n){if(null==r)return"";var e,t,i,s={},u={},a="",p="",c="",l=2,f=3,h=2,d=[],m=0,v=0;for(i=0;i<r.length;i+=1)if(a=r.charAt(i),Object.prototype.hasOwnProperty.call(s,a)||(s[a]=f++,u[a]=!0),p=c+a,Object.prototype.hasOwnProperty.call(s,p))c=p;else{if(Object.prototype.hasOwnProperty.call(u,c)){if(c.charCodeAt(0)<256){for(e=0;e<h;e++)m<<=1,v==o-1?(v=0,d.push(n(m)),m=0):v++;for(t=c.charCodeAt(0),e=0;e<8;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1}else{for(t=1,e=0;e<h;e++)m=m<<1|t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t=0;for(t=c.charCodeAt(0),e=0;e<16;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1}0==--l&&(l=Math.pow(2,h),h++),delete u[c]}else for(t=s[c],e=0;e<h;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1;0==--l&&(l=Math.pow(2,h),h++),s[p]=f++,c=String(a)}if(""!==c){if(Object.prototype.hasOwnProperty.call(u,c)){if(c.charCodeAt(0)<256){for(e=0;e<h;e++)m<<=1,v==o-1?(v=0,d.push(n(m)),m=0):v++;for(t=c.charCodeAt(0),e=0;e<8;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1}else{for(t=1,e=0;e<h;e++)m=m<<1|t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t=0;for(t=c.charCodeAt(0),e=0;e<16;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1}0==--l&&(l=Math.pow(2,h),h++),delete u[c]}else for(t=s[c],e=0;e<h;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1;0==--l&&(l=Math.pow(2,h),h++)}for(t=2,e=0;e<h;e++)m=m<<1|1&t,v==o-1?(v=0,d.push(n(m)),m=0):v++,t>>=1;for(;;){if(m<<=1,v==o-1){d.push(n(m));break}v++}return d.join("")},decompress:function(r){return null==r?"":""==r?null:i._decompress(r.length,32768,function(o){return r.charCodeAt(o)})},_decompress:function(o,n,e){var t,i,s,u,a,p,c,l=[],f=4,h=4,d=3,m="",v=[],g={val:e(0),position:n,index:1};for(t=0;t<3;t+=1)l[t]=t;for(s=0,a=Math.pow(2,2),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;switch(s){case 0:for(s=0,a=Math.pow(2,8),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;c=r(s);break;case 1:for(s=0,a=Math.pow(2,16),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;c=r(s);break;case 2:return""}for(l[3]=c,i=c,v.push(c);;){if(g.index>o)return"";for(s=0,a=Math.pow(2,d),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;switch(c=s){case 0:for(s=0,a=Math.pow(2,8),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;l[h++]=r(s),c=h-1,f--;break;case 1:for(s=0,a=Math.pow(2,16),p=1;p!=a;)u=g.val&g.position,g.position>>=1,0==g.position&&(g.position=n,g.val=e(g.index++)),s|=(u>0?1:0)*p,p<<=1;l[h++]=r(s),c=h-1,f--;break;case 2:return v.join("")}if(0==f&&(f=Math.pow(2,d),d++),l[c])m=l[c];else{if(c!==h)return null;m=i+i.charAt(0)}v.push(m),l[h++]=i+m.charAt(0),i=m,0==--f&&(f=Math.pow(2,d),d++)}}};return i}();"function"==typeof define&&define.amd?define(function(){return LZString}):"undefined"!=typeof module&&null!=module?module.exports=LZString:"undefined"!=typeof angular&&null!=angular&&angular.module("LZString",[]).factory("LZString",function(){return LZString});
diff --git a/flake.nix b/flake.nix
index dbc5dcde2..a57e309fb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -177,6 +177,7 @@
             pkgs.pkg-config
             pkgs.rust-analyzer
             pkgs.toml2json
+            pkgs.mdbook
             rustfmt
             rustc
 
diff --git a/justfile b/justfile
index 2414dd5f0..0edcc0754 100644
--- a/justfile
+++ b/justfile
@@ -59,6 +59,10 @@ _test:
 test-review: (_ensure_command_in_path "cargo-insta" "Insta (https://insta.rs)")
   cargo insta review
 
+# Serve the book
+book: (_ensure_command_in_path "mdbook" "mdBook (https://rust-lang.github.io/mdBook/)")
+  cd book && mdbook serve
+
 # Check the coherency between issues labeled `marked-unimplemented` on GitHub and issues mentionned in the engine in the `Unimplemented {issue_id: ...}` errors.
 @check-issues:
   just _ensure_command_in_path jq "jq (https://jqlang.github.io/jq/)"