:root {
  --bg: #fffaf5;
  --card: #ffffff;
  --text: #2d2a32;
  --muted: #6b6573;
  --accent: #e0457b;
  --line: #f0e4ea;
  --note: #fff1f5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1a21;
    --card: #26222b;
    --text: #f1edf4;
    --muted: #b3abbb;
    --accent: #ff7aa8;
    --line: #3a3440;
    --note: #33242c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  line-height: 1.8;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header.site { border-bottom: 1px solid var(--line); background: var(--card); }
header.site nav { max-width: 760px; margin: 0 auto; padding: 12px 16px; display: flex; gap: 16px; flex-wrap: wrap; }
a { color: var(--accent); }
h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; padding-bottom: 4px; border-bottom: 2px solid var(--line); }
.lead { color: var(--muted); margin-top: 0; }
.note { background: var(--note); border-radius: 12px; padding: 12px 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 20px; margin: 16px 0; }
code { background: var(--line); border-radius: 6px; padding: 1px 6px; font-size: 0.92em; word-break: break-all; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--note); }
.table-wrap { overflow-x: auto; }
footer { color: var(--muted); font-size: 0.9rem; margin-top: 48px; border-top: 1px solid var(--line); padding-top: 16px; }
h3 { font-size: 1.05rem; margin: 24px 0 8px; }
details.faq { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin: 8px 0; }
details.faq summary { cursor: pointer; padding: 10px 16px; font-weight: 600; }
details.faq[open] summary { border-bottom: 1px solid var(--line); }
details.faq > :not(summary) { margin-left: 16px; margin-right: 16px; }
.warn { background: var(--note); border-radius: 8px; padding: 8px 12px; }
.muted { color: var(--muted); font-size: 0.95rem; }
a.button { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; border-radius: 999px; padding: 8px 20px; }
a.button:hover { opacity: 0.9; }
ol.steps > li { margin: 6px 0; }
ol.steps ul { margin: 4px 0; }
figure { margin: 12px 0 20px; }
figure img { display: block; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
.figs { display: grid; gap: 4px; }