pico/docs/scss/layout/_aside.scss

/**
 * Docs: Aside
 */

main > aside {

  nav {
    width: 100%;
    margin-bottom: $spacing-block;

    h1 {
      margin-bottom: $spacing-typography;
    }

    @media (min-width: map-get($breakpoints, "lg")) {
      position: fixed;
      width: 200px;
      max-height: calc(100vh - 5.5rem);
      margin-bottom: 0;
      overflow-x: hidden;
      overflow-y: auto;

      h1 {
        display: none;
      }
    }
  }

  li, summary {
    padding-top: 0;
    padding-bottom: 0;
    font-size: 16px;
  }

  li a {
    padding: 0.375rem 0.5rem;

    svg {
      vertical-align: middle;
    }
  }

  a,
  a.secondary {
    &:focus {
      background-color: transparent;
      color: var(--primary-hover);
    }
  }

  details {
    padding-bottom: .25rem;
    border-bottom: none;

    summary {
      color: var(--h3);
      font-size: 14px;
      font-weight: 300;
      text-transform: uppercase;

      &::after {
        display: none;
      }
    }

    &[open] summary {
      color: var(--h3);
    }
  }
}

[role=document] {
  section > h1,
  section > h2,
  section > h3 {
    line-height: 1;
  }
}