:root {
  color-scheme: light dark;
  --text: #1b2033;
  --muted: #5b6481;
  --accent: #1f74d8;
  --line: rgba(27, 32, 51, 0.12);
  --panel: rgba(31, 116, 216, 0.06);
  --page: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--page);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #eef2fb;
    --muted: #a3adc8;
    --accent: #6bb8ff;
    --line: rgba(255, 255, 255, 0.12);
    --panel: rgba(107, 184, 255, 0.08);
    --page: #0b1030;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

header.guide-header {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 8px;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

h2 {
  margin: 48px 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 28px 0 8px;
  font-size: 1.12rem;
}

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

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

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

nav.contents {
  padding: 16px 20px;
  background: var(--panel);
  border-radius: 14px;
}

nav.contents ol {
  margin: 0;
  padding-left: 1.3em;
  columns: 2;
  column-gap: 32px;
}

.note {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--panel);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
}

table {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-weight: 600;
}

kbd {
  padding: 1px 6px;
  font-family: inherit;
  font-size: 0.9em;
  border: 1px solid var(--line);
  border-radius: 5px;
}

footer.guide-footer {
  margin-top: 56px;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 560px) {
  h1 {
    font-size: 1.8rem;
  }

  nav.contents ol {
    columns: 1;
  }
}