:root {
  color-scheme: light dark;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --text: #1c1d1f;
  --muted: #62666d;
  --border: #deded8;
  --accent: #315f7d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 8px;
}

.brand {
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 750;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
}

.document {
  margin-top: 28px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.05;
}

h2 {
  margin: 36px 0 12px;
  font-size: 1.35rem;
  line-height: 1.25;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
}

p,
li {
  color: var(--text);
}

.meta,
.muted {
  color: var(--muted);
}

ul {
  padding-left: 22px;
}

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

th,
td {
  padding: 10px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

.callout {
  padding: 16px;
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  border: 1px solid var(--border);
  border-radius: 8px;
}

.footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315;
    --surface: #191c1f;
    --text: #f1f1ec;
    --muted: #a9adb3;
    --border: #30343a;
    --accent: #8cc5e9;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 24px, 920px);
    padding-top: 18px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .document {
    padding: 22px 18px;
  }
}