:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --card: #ffffff;
  --border: #e2e8f0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --fg: #e2e8f0;
    --muted: #94a3b8;
    --accent: #60a5fa;
    --card: #111827;
    --border: #1f2937;
  }
}

* {
  box-sizing: border-box;
}

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

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header {
  margin-bottom: 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  margin: 0.25rem 0 0;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
}

nav a {
  color: var(--accent);
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.15rem;
  margin: 1.75rem 0 0.75rem;
  scroll-margin-top: 1rem;
}

h3 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
  scroll-margin-top: 1rem;
}

h2:first-of-type {
  margin-top: 0;
}

.toc {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
}

.toc ol {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.toc a {
  color: var(--accent);
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

ol,
ul {
  padding-left: 1.35rem;
}

li {
  margin: 0.35rem 0;
}

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

.legal-footer {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

code {
  font-size: 0.88em;
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

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

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--bg);
}

.notice {
  background: #fef3c7;
  color: #78350f;
  border: 1px solid #fcd34d;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

@media (prefers-color-scheme: dark) {
  .notice {
    background: #422006;
    color: #fde68a;
    border-color: #92400e;
  }
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hero-links a {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  text-decoration: none;
  font-weight: 500;
}

.hero-links a span {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

.hero-links a:hover {
  border-color: var(--accent);
}