:root { --fg: #1d1d1f; --bg: #fafaf7; --muted: #666; --line: #ddd; --accent: #8a1c1c; }
@media (prefers-color-scheme: dark) {
  :root { --fg: #e8e8e8; --bg: #161616; --muted: #aaa; --line: #333; --accent: #e07a7a; }
}
* { box-sizing: border-box; }
body { margin: 0 auto; max-width: 760px; padding: 0 16px 48px; font-family: system-ui, "Hiragino Sans", "Yu Gothic UI", sans-serif; line-height: 1.8; color: var(--fg); background: var(--bg); }
header { padding: 16px 0 8px; border-bottom: 1px solid var(--line); }
header .home { font-weight: bold; }
header nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 0.9rem; margin-top: 4px; }
.site { color: var(--muted); font-size: 0.85rem; margin-left: 8px; }
.notice { font-size: 0.85rem; color: var(--muted); }
a { color: var(--accent); }
details.step { border: 1px solid var(--line); border-radius: 6px; padding: 8px 12px; margin: 12px 0; }
details.step > summary { cursor: pointer; font-weight: bold; }
details.answer > summary { color: var(--accent); }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; }
dt { font-weight: bold; }
.pr { font-size: 0.75rem; border: 1px solid var(--muted); border-radius: 3px; padding: 0 4px; color: var(--muted); }
.pager { display: flex; justify-content: space-between; margin-top: 32px; }
form label { display: block; margin: 8px 0; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 0.85rem; color: var(--muted); }
img.portrait { display: block; width: 112px; height: auto; margin: 8px 0; image-rendering: pixelated; }
img.map { display: block; width: 100%; max-width: 538px; height: auto; margin: 16px 0; image-rendering: pixelated; }
table.answers { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
table.answers th, table.answers td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; }