:root {
  --bg: #f7f7f5; --fg: #1f2328; --muted: #656d76;
  --card: #ffffff; --line: #d8dee4; --accent: #c8102e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181b; --fg: #e6edf3; --muted: #9198a1; --card: #1f2328; --line: #30363d; --accent: #ff6b81; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif; }
a { color: var(--accent); }
.site-header { background: var(--card); border-bottom: 1px solid var(--line); padding: 12px 16px; }
.site-header .logo { font-weight: 700; color: var(--fg); text-decoration: none; margin-right: 16px; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 6px; font-size: .9rem; }
main, footer { max-width: 860px; margin: 0 auto; padding: 0 16px; }
h1 { margin: 28px 0 4px; font-size: 1.7rem; }
h2 { font-size: 1.1rem; border-left: 4px solid var(--accent); padding-left: 10px; margin: 0 0 12px; }
.lead { color: var(--muted); margin: 0 0 20px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
dt { font-weight: 600; } dd { margin: 0 0 8px; }
label { display: block; margin: 10px 0 4px; font-weight: 600; }
input, select, textarea { width: 100%; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); font: inherit; }
button { margin-top: 12px; padding: 8px 16px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; font: inherit; cursor: pointer; }
.inline-form { display: flex; gap: 8px; align-items: end; }
.inline-form button { margin: 0; white-space: nowrap; }
.img { width: 100%; max-width: 320px; aspect-ratio: 16/9; border-radius: 8px; background: linear-gradient(135deg, #f4a261, #c8102e); }
.dynamic p { margin: 6px 0; padding: 6px 10px; background: var(--bg); border-radius: 6px; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.tabs a { padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; }
.tabs a.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.debug { font-family: ui-monospace, monospace; font-size: .85rem; color: var(--muted); white-space: pre-wrap; word-break: break-all; }
footer { color: var(--muted); font-size: .85rem; padding-bottom: 40px; }