:root {
  --bg: #ffffff; --text: #1d1d1f; --muted: #6e6e73; --line: #e5e5ea; --accent: #1e6bff; --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111113; --text: #f5f5f7; --muted: #a1a1a6; --line: #2c2c2e; --accent: #6ea4ff; --card: #1c1c1e; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
.page { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 40px; }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; font-weight: 600; font-size: 18px; }
.icon { width: 40px; height: 40px; flex: none; }
nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
h1 { font-size: 32px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 40px 0 8px; }
h3 { font-size: 16px; margin: 24px 0 4px; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: var(--accent); }
.lede { color: var(--muted); font-size: 18px; margin-bottom: 28px; }
.meta { color: var(--muted); font-size: 14px; margin-bottom: 28px; }
.card { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 20px 0; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 24px 0; }
.features .card { margin: 0; }
.features h3 { margin-top: 0; }
kbd { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--card); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; white-space: nowrap; }
footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer a { color: var(--muted); }