:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1d21;
  --muted: #5b6068;
  --line: #e2e5ea;
  --card: #f6f7f9;
  --accent: #2f6fd0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e7e9ec;
    --muted: #9aa1ab;
    --line: #2b2f36;
    --card: #1d2026;
    --accent: #6ea8f0;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.85;
  font-size: 16px;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }
a { color: var(--accent); }
code {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.88em;
}

.bar { border-bottom: 1px solid var(--line); }
.bar-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.logo { font-size: 19px; font-weight: 700; text-decoration: none; color: var(--fg); }
.bar nav a { font-size: 14px; text-decoration: none; }

.hero { padding: 56px 0 12px; }
.hero h1 { font-size: 30px; line-height: 1.45; margin: 0 0 18px; }
.lead { color: var(--muted); margin: 0; }

section { padding: 26px 0; }
h2 { font-size: 19px; margin: 0 0 12px; }

.features { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.features li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}
.features b { display: block; margin-bottom: 2px; }
.features span { color: var(--muted); font-size: 15px; }

.doc { padding-bottom: 30px; }
.doc h1 { font-size: 26px; margin: 44px 0 6px; }
.doc h2 { margin-top: 34px; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 26px; }

table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: var(--card); }

.foot {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-top: 22px;
  padding-bottom: 40px;
  color: var(--muted);
  font-size: 14px;
}
.foot p { margin: 4px 0; }

@media (max-width: 520px) {
  .hero h1 { font-size: 24px; }
  body { font-size: 15px; }
}