:root {
  --bg: #f6f7f9; --card: #fff; --ink: #1c2430; --muted: #687385; --line: #dfe3ea;
  --brand: #1f3a5f; --brand-ink: #fff; --accent: #2f6fb3; --mark: #fff1a8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151b; --card: #1a2029; --ink: #e6e9ee; --muted: #9aa4b2; --line: #2b3340;
    --brand: #16283f; --accent: #7fb0ea; --mark: #5c4d0a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
.bar {
  position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 8px;
  padding: calc(env(safe-area-inset-top) + 10px) 16px 10px; background: var(--brand); color: var(--brand-ink);
}
.bar h1 { margin: 0; font-size: 18px; flex: 1; }
.icon-btn { background: none; border: 0; color: inherit; font-size: 28px; line-height: 1; padding: 0 8px 0 0; }
.net { font-size: 12px; background: #c0392b; padding: 2px 8px; border-radius: 99px; }
main, article { max-width: 760px; margin: 0 auto; padding: 16px; padding-bottom: calc(env(safe-area-inset-bottom) + 24px); }

.qrow { display: flex; gap: 8px; }
input, select, button { font: inherit; color: inherit; }
input, select {
  width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; background: var(--card);
}
button[type=submit], .more {
  padding: 10px 18px; border: 0; border-radius: 10px; background: var(--accent); color: #fff; white-space: nowrap;
}
details { margin-top: 10px; }
summary { color: var(--accent); cursor: pointer; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.grid label { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }

.muted { color: var(--muted); font-size: 14px; }
#results { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.item {
  display: block; padding: 14px; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; color: inherit; text-decoration: none;
}
.item h3 { margin: 0 0 4px; font-size: 16px; }
.item .meta { font-size: 13px; color: var(--muted); }
.item p { margin: 6px 0 0; font-size: 14px; overflow-wrap: anywhere; }
.tag { display: inline-block; font-size: 12px; padding: 0 6px; border-radius: 6px; border: 1px solid var(--line); margin-right: 4px; }
mark { background: var(--mark); color: inherit; border-radius: 2px; }
.more { display: block; width: 100%; margin-top: 14px; }

#doc-title { margin: 0 0 4px; font-size: 20px; }
#doc-body {
  white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; font-size: 15px; line-height: 1.9;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px;
}
a { color: var(--accent); }

/* 範例資料標示 */
.item.demo { border-style: dashed; }
.tag.demo { background: var(--demo); color: #fff; border-color: var(--demo); }
.demo-banner { background: var(--demo); color: #fff; padding: 10px 14px; border-radius: 10px; font-size: 14px; }
:root { --demo: #c0392b; }