styles.css

@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,500;1,300&display=swap");
@font-face {
  font-family: "Norse Bold";
  src: url("./Norse-Bold.otf");
}
:root {
  --black: #000;
  --light-gray: #b9b9b9;
  --white: #fff;
  --neon-pink: #e6007e;
  --light-green: #90ee90;
}

body {
  font-family: "Roboto", sans-serif;
  font-size: 1em;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  color: var(--light-gray);
}

.wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Left side */

.left {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-basis: 40%;

  background-image: url(./images/dayso-GysN_Afm25A-unsplash.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  min-height: 40vh;
}

.logo {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.1em 0 0.1em 0;
  position: relative;
  top: 3vh;

  background-color: rgba(0, 0, 0, 0.45);
  font-family: "Norse Bold";
  font-size: 4em;
}

.logo img {
  height: 75px;
}

.credit {
  text-align: end;
  text-transform: uppercase;
  padding: 0 1em 1em 0;
  font-size: 0.7em;
  background-color: rgba(0, 0, 0, 0.5);
}

.credit a {
  text-decoration: none;
}

/* Right side */

.right {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-basis: 60%;
  background-color: var(--black);
  row-gap: 4em;
}

.dummy-text,
.log-in {
  padding: 0 2em;
}

.dummy-text {
  display: flex;
  flex-flow: column nowrap;
  row-gap: 2em;
  margin-top: 1.5em;
  text-align: center;
}

.dummy-text > p {
  font-size: 1.15em;
}

form {
  display: flex;
  flex-direction: column;
  gap: 40px;
  align-items: center;
  background-color: rgb(6, 6, 6);
  padding: 20px 2em;
}

.form-wrapper {
  display: flex;
  flex-wrap: wrap;
  column-gap: 1em;
  row-gap: 1em;
  justify-content: center;
  text-align: center;
  margin-bottom: 1em;
}

.form-wrapper h2 {
  flex-basis: 80%;
}

.form-wrapper > p {
  flex-basis: 100%;
  color: var(--neon-pink);
}

.form-row {
  flex-basis: 80%;
}

.form-row label {
  display: block;
  text-transform: uppercase;
  font-size: 0.8em;
  letter-spacing: 0.1em;
  white-space: nowrap;
  min-width: 165px;
}

.form-row input {
  background-color: rgb(2, 2, 2);
  border: 1px solid var(--light-gray);
  padding: 7px;
  border-radius: 3px;
}

.form-row input:required {
  border: 2px solid var(--neon-pink);
}

.form-row input + span {
  position: relative;
}

.form-row input + span::before {
  position: absolute;
  right: 10px;
  top: 1px;
}

input:invalid + span::before {
  content: "✖";
  color: var(--neon-pink);
  font-weight: bold;
}

input:valid + span::before {
  content: "✓";
  color: var(--light-green);
  font-weight: bold;
}

.error {
  font-weight: bold;
  color: var(--neon-pink);
  position: relative;
  top: 10px;
}

.form-row input:valid {
  border: 2px solid var(--light-green);
}

.form-row input:focus {
  outline: none;
  border: 2px solid var(--light-gray);
}

form > button {
  padding: 1em;
  background-color: rgba(0, 0, 0, 0);
  border: 3px solid var(--neon-pink);
  border-radius: 1em;
  text-transform: uppercase;
  font-weight: bold;
  font-size: 1.05em;
  color: var(--neon-pink);
  text-align: center;
  cursor: pointer;
}

form > button:hover {
  color: var(--black);
  background-color: var(--neon-pink);
}

.dummy-text > p > em,
.log-in > p > a,
.form-row > label > span,
.form-row + p {
  color: var(--neon-pink);
  font-weight: bold;
}

.log-in {
  margin-bottom: 1em;
}

.log-in > p > a {
  text-decoration: none;
}

@media only screen and (min-width: 750px) {
  .wrapper {
    flex-direction: row;
  }

  /* Left section */

  .credit {
    font-size: 0.8em;
    letter-spacing: 0.1em;
    text-align: end;
  }

  .logo {
    top: 5vh;
    background: none;
  }

  /* Right section */

  .right {
    align-items: flex-start;
  }

  .dummy-text,
  form,
  .log-in {
    padding: 0 4em;
  }

  form {
    padding: 20px 4em;
    box-shadow: 0 20px 20px 0 rgb(22, 22, 22);
  }

  .dummy-text > p {
    font-size: 1.5em;
    text-align: left;
  }

  form {
    align-items: flex-start;
  }

  .form-wrapper {
    text-align: left;
    justify-content: flex-start;
  }

  .form-row {
    flex-basis: 40%;
  }

  .form-row > input {
    width: 100%;
  }
}