:root {
  --bg: #ffffff; --fg: #1a1a1a; --muted: #5f6368; --line: #e3e3e3; --accent: #0b57d0; --card: #f7f8fa; --code: #eef1f5;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; line-height: 1.55;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121314; --fg: #e8eaed; --muted: #a0a4a8; --line: #2c2e31; --accent: #8ab4f8; --card: #1b1c1e; --code: #25272a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); }
a { color: var(--accent); }
header.site, footer.site, main { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header.site { display: flex; justify-content: space-between; align-items: center; padding-top: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
header.site .brand { font-weight: 700; text-decoration: none; color: var(--fg); }
header.site nav a { margin-left: 8px; }
main { padding-top: 8px; padding-bottom: 32px; }
h1 { font-size: 1.8rem; line-height: 1.25; }
.lead { color: var(--muted); }
.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.card h3 { margin: 0 0 4px; font-size: 1.05rem; }
.card p { margin: 4px 0; }
.card .meta { color: var(--muted); font-size: 0.85rem; }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; }
.guide img { max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 8px; }
.guide table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.guide th, .guide td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.langs { margin: 24px 0; color: var(--muted); }
footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.85rem; padding-top: 12px; padding-bottom: 24px; }
.draft { border: 1px solid var(--line); border-radius: 10px; padding: 12px; margin: 16px 0; }
.copy { display: grid; grid-template-columns: 1fr auto; gap: 6px; margin: 8px 0; }
.copy label { grid-column: 1 / -1; font-size: 0.85rem; color: var(--muted); }
.copy input, .copy textarea { width: 100%; font: 0.85rem ui-monospace, monospace; background: var(--code); color: var(--fg); border: 1px solid var(--line); border-radius: 6px; padding: 6px; }
.copy button { align-self: start; padding: 6px 12px; }