:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #1b1f24; --muted: #667085; --line: #e4e7ec;
  --accent: #1f4e8c; --accent-soft: #e8eff8; --warn: #9a5b00; --warn-soft: #fff4e0; --danger: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --card: #1a1e24; --text: #e7e9ec; --muted: #98a2b3; --line: #2b313a;
    --accent: #8db4ea; --accent-soft: #1f2a38; --warn: #f0b456; --warn-soft: #33291a; --danger: #f97066; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif; }
a { color: inherit; }
.wrap { max-width: 880px; margin: 0 auto; padding: 20px 16px 60px; }
header.top { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
header.top h1 { font-size: 21px; margin: 0; letter-spacing: -0.3px; }
.meta { color: var(--muted); font-size: 13px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0 16px; }
.tabs button { border: 1px solid var(--line); background: var(--card); color: var(--text); padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 14px; }
.tabs button.on { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .tabs button.on { color: #10151c; } }
details.group { border: 1px solid var(--line); background: var(--card); border-radius: 8px; margin: 10px 0; }
details.group > summary { cursor: pointer; list-style: none; display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px; padding: 12px 14px; font-size: 16px; font-weight: 600;
  background: var(--accent-soft); border-radius: 8px; }
details.group[open] > summary { border-radius: 8px 8px 0 0; }
details.group > summary::-webkit-details-marker { display: none; }
details.group > summary::before { content: '▸'; color: var(--muted); width: 12px; }
details.group[open] > summary::before { content: '▾'; }
details.group > summary .count { font-size: 13px; padding: 1px 8px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); }
details.group > summary small { color: var(--muted); font-weight: 400; font-size: 12px; }
details.group .gbody { padding: 10px 10px 2px; border-top: 1px solid var(--line); background: var(--bg); border-radius: 0 0 8px 8px; }
.item { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 8px; }
.item a.title { font-weight: 600; text-decoration: none; }
.item a.title:hover { text-decoration: underline; }
.item .sub { color: var(--muted); font-size: 13px; margin-top: 3px; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.badge { font-size: 12px; padding: 1px 6px; border-radius: 4px; background: var(--accent-soft); color: var(--accent); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
details.rel { margin-top: 6px; font-size: 13px; }
details.rel summary { cursor: pointer; color: var(--accent); }
details.rel ul { margin: 6px 0 0; padding-left: 18px; }
details.rel li { margin: 3px 0; }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }
.foot { color: var(--muted); font-size: 12px; margin-top: 30px; border-top: 1px solid var(--line); padding-top: 12px; }

/* 관리자 */
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
.panel h3 { margin: 0 0 10px; font-size: 16px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
input[type=text], input[type=password], textarea, select { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); font: inherit; }
textarea { min-height: 62px; resize: vertical; }
label.f { display: block; font-size: 13px; color: var(--muted); margin: 8px 0 3px; }
.btn { border: 1px solid var(--accent); background: var(--accent); color: #fff; padding: 7px 14px; border-radius: 6px; cursor: pointer; font: inherit; font-size: 14px; }
@media (prefers-color-scheme: dark) { .btn { color: #10151c; } }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn:disabled { opacity: .5; cursor: default; }
.cat { border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin-bottom: 10px; }
.cat .head { display: flex; gap: 8px; align-items: center; }
.cat .head input[type=text] { flex: 1; font-weight: 600; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 600px) { .grid2 { grid-template-columns: 1fr; } }
.msg { font-size: 13px; margin-top: 8px; min-height: 18px; }
.msg.err { color: var(--danger); }
.login { max-width: 340px; margin: 60px auto; }
.hidden { display: none !important; }