:root {
  color-scheme: light dark;
  --surface: light-dark(#ffffff, #172131);
  --surface-muted: light-dark(#f4f7fa, #202d40);
  --text: light-dark(#233047, #e2e9f2);
  --text-muted: light-dark(#526277, #adbcd0);
  --accent: light-dark(#1667ac, #83c3ff);
  --border: light-dark(#d6dee8, #3c4d65);
  --accent-soft: color-mix(in srgb, var(--accent) 10%, var(--surface));
  --sidebar-width: 17rem;
  --radius: 0.6rem;
  font-family: system-ui, sans-serif;
  line-height: 1.65;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-block-size: 100dvh;
  margin: 0;
  background: var(--surface);
  color: var(--text);

  @media (width <= 48rem) {
    grid-template-columns: minmax(0, 1fr);
  }
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;

  &:hover {
    text-decoration-thickness: 0.14em;
  }

  &:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
    border-radius: 0.2rem;
  }
}

.sidebar {
  position: sticky;
  inset-block-start: 0;
  align-self: start;
  block-size: 100dvh;
  overflow-y: auto;
  padding: 2rem 1.25rem;
  border-inline-end: 1px solid var(--border);
  background: var(--surface-muted);

  & > a:last-child {
    display: inline-block;
    margin-block-start: 1.5rem;
    font-size: 0.875rem;
  }

  @media (width <= 48rem) {
    position: static;
    block-size: auto;
    padding: 1.25rem;
    border-inline-end: 0;
    border-block-end: 1px solid var(--border);
  }
}

.brand {
  display: block;
  margin-block-end: 1.5rem;
  font-size: 1.5rem;
  font-weight: 750;
  letter-spacing: -0.035em;
  text-decoration: none;
}

nav {
  display: grid;
  gap: 0.2rem;

  & a {
    display: block;
    padding: 0.45rem 0.75rem;
    border-inline-start: 3px solid transparent;
    border-radius: var(--radius);
    color: var(--text-muted);
    text-decoration: none;

    &:hover {
      background: var(--accent-soft);
      color: var(--accent);
    }

    &[aria-current="page"] {
      border-inline-start-color: var(--accent);
      background: var(--accent-soft);
      color: var(--accent);
      font-weight: 650;
    }

    &.child {
      padding-inline-start: 1.75rem;
      font-size: 0.925rem;
    }
  }
}

main {
  inline-size: 100%;
  max-inline-size: 66rem;
  min-inline-size: 0;
  padding: clamp(1.25rem, 4vw, 3.5rem);
  overflow-wrap: anywhere;

  & > :first-child {
    margin-block-start: 0;
  }

  & :is(h1, h2, h3, h4) {
    line-height: 1.25;
    scroll-margin-block-start: 1.5rem;
    text-wrap: balance;
  }

  & h1 {
    margin-block: 0 1.5rem;
    font-size: clamp(2rem, 4vw, 2.75rem);
    letter-spacing: -0.04em;
  }

  & h2 {
    margin-block: 2.5rem 1rem;
    padding-block-end: 0.5rem;
    border-block-end: 1px solid var(--border);
    font-size: 1.5rem;
    letter-spacing: -0.02em;
  }

  & :is(ul, ol) {
    padding-inline-start: 1.5rem;
  }

  & li + li {
    margin-block-start: 0.35rem;
  }
}

img {
  max-inline-size: 100%;
  block-size: auto;
  vertical-align: middle;
}

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.875em;
}

:not(pre) > code {
  padding: 0.15em 0.35em;
  border-radius: 0.3rem;
  background: var(--surface-muted);
}

pre {
  max-inline-size: 100%;
  overflow-x: auto;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-muted);
  overflow-wrap: normal;
  tab-size: 4;

  & code {
    padding: 0;
    background: none;
  }
}

table {
  display: block;
  max-inline-size: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.925rem;

  & :is(th, td) {
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
    text-align: start;
    vertical-align: top;
  }

  & th {
    background: var(--surface-muted);
    font-weight: 650;
  }
}

blockquote {
  margin-inline: 0;
  padding-inline-start: 1rem;
  border-inline-start: 3px solid var(--accent);
  color: var(--text-muted);
}

footer {
  margin-block-start: 3rem;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--border);
  font-size: 0.875rem;
}

.skip {
  position: fixed;
  inset-block-start: 1rem;
  inset-inline-start: 1rem;
  z-index: 1;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  background: var(--surface);
  transform: translateY(calc(-100% - 2rem));

  &:focus {
    transform: none;
  }
}

@media print {
  body {
    display: block;
    background: white;
    color: black;
  }

  .sidebar,
  .skip,
  footer {
    display: none;
  }

  main {
    max-inline-size: none;
    padding: 0;
  }
}