index.css

* {
  margin-block: 0;
  margin-inline: 0;
  padding-block: 0;
  padding-inline: 0;
  border-block: 0;
  border-inline: 0;
  box-sizing: border-box;
}

:root {
  --sparkling-red: #f33031;
  --jade-glass: #0ccfce;
  --nero: #262626;
}

body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto;
  grid-auto-flow: row;
  gap: 1rem;
  align-items: stretch;
  background-color: black;
  color: white;
  block-size: 100vh;
  padding-inline: 10rem;

  @media screen and (width < 744px) {
    padding-inline: 5rem;
  }
  @media screen and (width < 600px) {
    grid-template-columns: 1fr;
  }
  @media screen and (width < 420px) {
    padding-inline: 2rem;
  }

  &::after,
  &::before {
    content: "";
    display: block;
    height: 1rem;
  }
  p,
  h1 {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--sparkling-red);
  }
  ul {
    margin-inline: 30px;
    grid-column: 1 / -1;
    font-size: 1.25rem;

    li {
      padding-block: 0.5rem;
      transition: all 0.5s ease-out 0s;

      a {
        color: white;
        transition: all 0.5s ease-out 0s;
        text-decoration-line: none;

        &:hover {
          color: blue;
        }
        code {
          font-family: monospace;
        }
      }
      &:hover {
        color: blue;
      }
    }
  }
  > a {
    background-color: var(--nero);
    padding-inline: 2rem;
    padding-block: 2rem;
    border-radius: 1rem;
    color: white;
    font-size: 1.25rem;
    text-decoration-line: none;
    transition: all 0.5s ease-in 0s;
    outline: 1px dashed gray;

    &:hover {
      box-shadow: 2px 2px 5px var(--sparkling-red),
        -2px -2px 5px var(--jade-glass), 2px -2px 5px gray, -2px 2px 5px gray;
    }
  }
}