:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1d1b;
  --muted: #6b6a66;
  --line: #e6e3dc;
  --accent: #e8590c;
  --accent-soft: #fff1e8;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --surface: #1f1f1d;
    --text: #efede8;
    --muted: #a4a29c;
    --line: #34332f;
    --accent: #ff8a3d;
    --accent-soft: #2c2018;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  line-height: 1.8;
  font-size: 16px;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header { border-bottom: 1px solid var(--line); background: var(--surface); }
header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding-top: 14px; padding-bottom: 14px; }
.logo { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: .02em; }
.logo span { color: var(--accent); }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .9rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); text-decoration: underline; text-underline-offset: 4px; }

main { padding: 40px 0 56px; }
h1 { font-size: 1.7rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 40px 0 12px; padding-top: 4px; }
h3 { font-size: 1.05rem; margin: 24px 0 8px; }
.lead { color: var(--muted); margin: 0 0 24px; }
.updated { color: var(--muted); font-size: .85rem; }

.hero { padding: 16px 0 8px; }
.hero h1 { font-size: clamp(1.45rem, 6vw, 2.1rem); }
.hero .tag { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .8rem; padding: 2px 10px; border-radius: 999px; margin-bottom: 12px; }

.cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); font-size: .92rem; }
.badge { display: inline-block; font-size: .75rem; border: 1px solid var(--line); border-radius: 999px; padding: 0 8px; color: var(--muted); margin-bottom: 8px; }

table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); }
tr:last-child th, tr:last-child td { border-bottom: none; }
th { width: 34%; font-weight: 700; background: var(--accent-soft); }
@media (max-width: 520px) {
  .kv th, .kv td { display: block; width: 100%; }
  .kv th { border-bottom: none; padding-bottom: 2px; }
}
.ph { background: #fff3bf; color: #5c4400; padding: 0 4px; border-radius: 4px; }
@media (prefers-color-scheme: dark) { .ph { background: #4a3b00; color: #ffe58a; } }

.note { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 12px 16px; font-size: .92rem; color: var(--muted); }
ul, ol { padding-left: 1.3em; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; padding: 24px 0 40px; }
footer nav { margin-bottom: 8px; }