:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1d23;
  --muted: #5b6370;
  --line: #e2e5ea;
  --accent: #2563eb;
  --badge-bg: #eef2ff;
  --badge-text: #3730a3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --surface: #1b1e26;
    --text: #eceef2;
    --muted: #a0a7b4;
    --line: #2d313c;
    --accent: #7aa2ff;
    --badge-bg: #26294a;
    --badge-text: #c7cdff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.65;
  word-break: keep-all;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); }
.wrap { width: 100%; max-width: 960px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); background: var(--surface); }
header.site .wrap { display: flex; align-items: center; gap: 10px; height: 56px; }
header.site a { color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.1rem; }
main { flex: 1; padding: 40px 0 56px; }
h1 { font-size: clamp(1.6rem, 5vw, 2.4rem); line-height: 1.25; margin: 0 0 12px; }
h2 { font-size: 1.25rem; margin: 2rem 0 .5rem; }
.lead { color: var(--muted); font-size: 1.05rem; max-width: 40em; margin: 0 0 32px; }
.grid { display: grid; gap: 14px; grid-template-columns: 1fr; list-style: none; padding: 0; margin: 0; }
@media (min-width: 560px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 880px) { .grid { grid-template-columns: repeat(4, 1fr); } }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  min-height: 140px;
}
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0 0 12px; color: var(--muted); font-size: .92rem; }
.badge { display: inline-block; font-size: .75rem; padding: 2px 9px; border-radius: 999px; background: var(--badge-bg); color: var(--badge-text); }
footer.site { border-top: 1px solid var(--line); background: var(--surface); padding: 20px 0; color: var(--muted); font-size: .9rem; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
.doc { max-width: 720px; }
.doc ul { padding-left: 1.2em; }
.doc li { margin: .3em 0; }
.doc table { border-collapse: collapse; width: 100%; font-size: .92rem; display: block; overflow-x: auto; }
.doc th, .doc td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.doc td:first-child { white-space: nowrap; }
.meta { color: var(--muted); font-size: .9rem; }