index.css

@import url('https://fonts.googleapis.com/css?family=Roboto');

/* Document
   ========================================================================== */

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */

 html {
  line-height: 1.15; /* 1 */
  -webkit-text-size-adjust: 100%; /* 2 */
  }

  /* Sections
   ========================================================================== */

  /**
   * Remove the margin in all browsers.
   */

  body {
  background-color: #131313;
  margin: 0;
  padding: 0;
  font-family: 'Roboto', sans-serif;
  }

  /**
   * Correct the font size and margin on `h1` elements within `section` and
   * `article` contexts in Chrome, Firefox, and Safari.
   */

  h1 {
  font-size: 2em;
  margin: 0.67em 0;
  }

  /* Grouping content
   ========================================================================== */

  /**
   * 1. Add the correct box sizing in Firefox.
   * 2. Show the overflow in Edge and IE.
   */

  hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
  }

  /**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

  pre {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
  }

  /* Text-level semantics
   ========================================================================== */

  /**
   * Remove the gray background on active links in IE 10.
   */

  a {
  background-color: transparent;
  }

  /**
   * 1. Remove the bottom border in Chrome 57-
   * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
   */

  abbr[title] {
  border-bottom: none; /* 1 */
  text-decoration: underline; /* 2 */
  text-decoration: underline dotted; /* 2 */
  }

  /**
   * Add the correct font weight in Chrome, Edge, and Safari.
   */

  b,
  strong {
  font-weight: bolder;
  }

  /**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

  code,
  kbd,
  samp {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
  }

  /**
   * Add the correct font size in all browsers.
   */

  small {
  font-size: 80%;
  }

  /**
   * Prevent `sub` and `sup` elements from affecting the line height in
   * all browsers.
   */

  sub,
  sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
  }

  sub {
  bottom: -0.25em;
  }

  sup {
  top: -0.5em;
  }

  /* Embedded content
   ========================================================================== */

  /**
   * Remove the border on images inside links in IE 10.
   */

  img {
  border-style: none;
  }

  /* Forms
   ========================================================================== */

  /**
   * 1. Change the font styles in all browsers.
   * 2. Remove the margin in Firefox and Safari.
   */

  button,
  input,
  optgroup,
  select,
  textarea {
  font-family: inherit; /* 1 */
  font-size: 100%; /* 1 */
  line-height: 1.15; /* 1 */
  margin: 0; /* 2 */
  }

  /**
   * Show the overflow in IE.
   * 1. Show the overflow in Edge.
   */

  button,
  input { /* 1 */
  overflow: visible;
  }

  /**
   * Remove the inheritance of text transform in Edge, Firefox, and IE.
   * 1. Remove the inheritance of text transform in Firefox.
   */

  button,
  select { /* 1 */
  text-transform: none;
  }

  /**
   * Correct the inability to style clickable types in iOS and Safari.
   */

  button,
  [type="button"],
  [type="reset"],
  [type="submit"] {
  -webkit-appearance: button;
  }

  /**
   * Remove the inner border and padding in Firefox.
   */

  button::-moz-focus-inner,
  [type="button"]::-moz-focus-inner,
  [type="reset"]::-moz-focus-inner,
  [type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
  }

  /**
   * Restore the focus styles unset by the previous rule.
   */

  button:-moz-focusring,
  [type="button"]:-moz-focusring,
  [type="reset"]:-moz-focusring,
  [type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
  }

  /**
   * Correct the padding in Firefox.
   */

  fieldset {
  padding: 0.35em 0.75em 0.625em;
  }

  /**
   * 1. Correct the text wrapping in Edge and IE.
   * 2. Correct the color inheritance from `fieldset` elements in IE.
   * 3. Remove the padding so developers are not caught out when they zero out
   *    `fieldset` elements in all browsers.
   */

  legend {
  box-sizing: border-box; /* 1 */
  color: inherit; /* 2 */
  display: table; /* 1 */
  max-width: 100%; /* 1 */
  padding: 0; /* 3 */
  white-space: normal; /* 1 */
  }

  /**
   * Add the correct vertical alignment in Chrome, Firefox, and Opera.
   */

  progress {
  vertical-align: baseline;
  }

  /**
   * Remove the default vertical scrollbar in IE 10+.
   */

  textarea {
  overflow: auto;
  }

  /**
   * 1. Add the correct box sizing in IE 10.
   * 2. Remove the padding in IE 10.
   */

  [type="checkbox"],
  [type="radio"] {
  box-sizing: border-box; /* 1 */
  padding: 0; /* 2 */
  }

  /**
   * Correct the cursor style of increment and decrement buttons in Chrome.
   */

  [type="number"]::-webkit-inner-spin-button,
  [type="number"]::-webkit-outer-spin-button {
  height: auto;
  }

  /**
   * 1. Correct the odd appearance in Chrome and Safari.
   * 2. Correct the outline style in Safari.
   */

  [type="search"] {
  -webkit-appearance: textfield; /* 1 */
  outline-offset: -2px; /* 2 */
  }

  /**
   * Remove the inner padding in Chrome and Safari on macOS.
   */

  [type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
  }

  /**
   * 1. Correct the inability to style clickable types in iOS and Safari.
   * 2. Change font properties to `inherit` in Safari.
   */

  ::-webkit-file-upload-button {
  -webkit-appearance: button; /* 1 */
  font: inherit; /* 2 */
  }

  /* Interactive
   ========================================================================== */

  /*
   * Add the correct display in Edge, IE 10+, and Firefox.
   */

  details {
  display: block;
  }

  /*
   * Add the correct display in all browsers.
   */

  summary {
  display: list-item;
  }

  /* Misc
   ========================================================================== */

  /**
   * Add the correct display in IE 10+.
   */

  template {
  display: none;
  }

  /**
   * Add the correct display in IE 10.
   */

  [hidden] {
  display: none;
  }

  a {
  color: #fff;
  }

  a:hover {
  color: #fff;
  text-decoration: underline;
  }

  @keyframes pulse_animation {
    0% { transform: scale(1); }
    40% { transform: scale(1.15); }
    100% { transform: scale(1); }
  }