:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --border: #d2d2d7;
  --accent: #0071e3;
  --code-bg: #f5f5f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1d1f;
    --fg: #f5f5f7;
    --muted: #98989d;
    --border: #424245;
    --accent: #2997ff;
    --code-bg: #2c2c2e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

nav {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
}

nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--accent); }
nav strong { color: var(--fg); font-weight: 600; }

h1 { font-size: 32px; font-weight: 700; margin: 24px 0 8px; line-height: 1.2; }
h2 { font-size: 22px; font-weight: 600; margin: 40px 0 12px; }
h3 { font-size: 18px; font-weight: 600; margin: 24px 0 8px; }

p, ul { margin: 12px 0; }

ul { padding-left: 24px; }
li { margin: 4px 0; }

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

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  background: var(--code-bg);
}

.muted { color: var(--muted); font-size: 14px; }
.updated { color: var(--muted); font-size: 14px; margin-top: 0; }

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 600px) {
  table { font-size: 13px; }
  th, td { padding: 8px; }
  h1 { font-size: 26px; }
}