:root {
  --bg: #f4f7f2;
  --surface: #ffffff;
  --ink: #17322b;
  --muted: #687b75;
  --line: #dce7e2;
  --primary: #226b57;
  --primary-dark: #184b3e;
  --accent: #e9a23b;
  --shadow: 0 12px 32px rgba(32, 64, 52, .12);
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font-family: system-ui, -apple-system, "Noto Sans TC", sans-serif; color: var(--ink); background: var(--bg); }
button, input { font: inherit; }
a { color: var(--primary); }
.topbar { min-height: 78px; display:flex; align-items:center; justify-content:space-between; gap:16px; padding:12px 22px; background:var(--surface); border-bottom:1px solid var(--line); }
h1 { margin:0; font-size:clamp(1.35rem, 2.3vw, 2rem); }
h2 { font-size:1rem; margin:0 0 10px; }
.eyebrow { margin:0 0 3px; color:var(--primary); font-size:.72rem; font-weight:800; letter-spacing:.12em; text-transform:uppercase; }
.header-actions { display:flex; gap:8px; flex-wrap:wrap; }
.btn { border:1px solid var(--line); background:#fff; color:var(--ink); padding:9px 13px; border-radius:10px; cursor:pointer; text-decoration:none; font-weight:700; }
.btn:hover { border-color:var(--primary); }
.btn-primary { background:var(--primary); border-color:var(--primary); color:#fff; }
.layout { height:calc(100vh - 78px); display:grid; grid-template-columns:280px minmax(360px, 1fr) 360px; gap:0; }
.sidebar, .info-panel { overflow:auto; background:var(--surface); padding:18px; }
.sidebar { border-right:1px solid var(--line); }
.info-panel { border-left:1px solid var(--line); }
.sidebar section { padding:0 0 18px; margin:0 0 18px; border-bottom:1px solid var(--line); }
.hint { color:var(--muted); font-size:.88rem; margin:0 0 10px; }
.filter-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.filter-btn { border:1px solid var(--line); background:#f8fbf9; border-radius:10px; padding:9px 7px; cursor:pointer; text-align:left; }
.filter-btn.active { color:#fff; background:var(--primary); border-color:var(--primary); }
.search-row { display:flex; gap:6px; }
.search-row input { width:100%; border:1px solid var(--line); padding:10px; border-radius:10px; outline:none; }
.search-row input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(34,107,87,.12); }
.icon-btn { width:42px; border:0; border-radius:10px; color:#fff; background:var(--primary); cursor:pointer; }
.search-results button { width:100%; text-align:left; border:0; border-bottom:1px solid var(--line); background:#fff; padding:9px 4px; cursor:pointer; }
.place-list { display:grid; gap:4px; max-height:250px; overflow:auto; }
.place-list button { display:flex; align-items:center; gap:8px; width:100%; border:0; border-bottom:1px solid var(--line); background:#fff; padding:8px 4px; text-align:left; cursor:pointer; color:var(--ink); }
.place-list button:hover { background:#edf5f1; }
.place-list small { display:block; color:var(--muted); font-size:.72rem; margin-top:2px; }
.lesson-box { background:#f2f8ee; border:1px solid #dfead7 !important; padding:14px !important; border-radius:14px; }
.lesson-box p { font-size:.92rem; line-height:1.55; }
.conservation-box { background:#fff5e8; border-color:#efd6ad !important; }
.text-btn { border:0; background:transparent; color:var(--primary); padding:0; font-weight:800; cursor:pointer; }
.map-panel { position:relative; min-width:0; }
#map { width:100%; height:100%; background:#0e1b1c; }
.map-note { position:absolute; z-index:500; left:50%; bottom:12px; transform:translateX(-50%); max-width:80%; padding:7px 10px; border-radius:8px; background:rgba(255,255,255,.9); box-shadow:var(--shadow); font-size:.72rem; color:var(--muted); pointer-events:none; }
.empty-state { margin:18vh auto 0; max-width:270px; text-align:center; color:var(--muted); }
.empty-state h2 { color:var(--ink); font-size:1.2rem; }
.empty-icon { font-size:3rem; }
.map-warning { margin:0 0 14px; padding:10px 12px; border:1px solid #f0c36d; border-radius:8px; background:#fff8e8; color:#6a4a00; font-size:.88rem; line-height:1.5; }
.place-title { margin:0; font-size:1.45rem; }
.place-en { color:var(--muted); margin:.2rem 0 .7rem; }
.tag-row { display:flex; flex-wrap:wrap; gap:6px; margin:10px 0 16px; }
.tag { padding:4px 8px; border-radius:999px; background:#edf5f1; color:var(--primary-dark); font-size:.78rem; font-weight:700; }
.info-section { margin:18px 0; }
.info-section p, .info-section li { line-height:1.65; }
.info-section ul { padding-left:1.2rem; }
.source-card { border:1px solid var(--line); border-radius:10px; padding:10px; margin:8px 0; font-size:.86rem; }
.action-links { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.action-links a { display:block; text-align:center; padding:10px; border-radius:10px; background:#edf5f1; text-decoration:none; font-weight:800; }
.photo-section { padding-top:16px; border-top:1px solid var(--line); }
.photo-heading { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px; }
.photo-heading h2 { margin:0; }
.photo-heading span { color:var(--muted); font-size:.76rem; font-weight:700; }
.photo-gallery { display:grid; grid-template-columns:repeat(2, minmax(0, 1fr)); gap:12px 8px; }
.photo-item { min-width:0; margin:0; }
.photo-item.panorama { grid-column:1 / -1; }
.photo-item > a { position:relative; display:block; overflow:hidden; border-radius:6px; background:#dfe8e3; }
.photo-item img { display:block; width:100%; height:auto; aspect-ratio:4 / 3; object-fit:cover; transition:transform .2s ease; }
.photo-item.panorama img { aspect-ratio:2.2 / 1; }
.photo-item > a:hover img { transform:scale(1.025); }
.panorama-badge { position:absolute; right:6px; top:6px; padding:3px 6px; border-radius:4px; background:rgba(18,42,35,.84); color:#fff; font-size:.68rem; font-weight:800; }
.photo-item figcaption { display:grid; gap:2px; padding-top:5px; color:var(--muted); font-size:.68rem; line-height:1.35; overflow-wrap:anywhere; }
.photo-title { display:-webkit-box; overflow:hidden; color:var(--ink); font-weight:700; -webkit-box-orient:vertical; -webkit-line-clamp:2; }
.photo-note { margin:10px 0 0; color:var(--muted); font-size:.72rem; line-height:1.45 !important; }
.legend-item { display:flex; align-items:center; gap:8px; margin:7px 0; font-size:.86rem; }
.legend-dot { width:13px; height:13px; border-radius:50%; border:2px solid rgba(0,0,0,.18); }
.custom-marker { display:grid; place-items:center; width:30px !important; height:30px !important; border-radius:50% 50% 50% 0; transform:rotate(-45deg); box-shadow:0 3px 10px rgba(0,0,0,.28); border:2px solid white; }
.custom-marker span { transform:rotate(45deg); font-size:15px; }
.map-label { border:0 !important; border-radius:3px; box-shadow:0 1px 4px rgba(0,0,0,.45); background:rgba(255,255,255,.92); color:#17322b; font-size:11px; font-weight:800; padding:2px 5px; white-space:nowrap; }
.map-label::before { display:none; }
.map-overview .map-label-place { display:none; }
.map-label-line { background:rgba(225,248,255,.9); color:#075a86; }
dialog { width:min(560px, 92vw); border:0; border-radius:18px; padding:0; box-shadow:var(--shadow); }
dialog::backdrop { background:rgba(17,35,30,.54); }
.quiz-card { padding:28px; position:relative; }
.dialog-close { position:absolute; right:12px; top:10px; border:0; background:transparent; font-size:1.8rem; cursor:pointer; }
.quiz-options { display:grid; gap:9px; margin:18px 0; }
.quiz-options button { border:1px solid var(--line); background:#fff; padding:12px; border-radius:10px; cursor:pointer; text-align:left; }
.quiz-options button.correct { background:#dff4e8; border-color:#56a276; }
.quiz-options button.wrong { background:#fee7e3; border-color:#d97d71; }
.quiz-feedback { min-height:1.5rem; font-weight:800; }
@media (max-width: 1050px) {
  .layout { grid-template-columns:235px 1fr 315px; }
}
@media (max-width: 820px) {
  .topbar { align-items:flex-start; }
  .layout { height:auto; min-height:calc(100vh - 78px); display:block; }
  .sidebar { border-right:0; }
  .map-panel { height:62vh; }
  .info-panel { border-left:0; border-top:1px solid var(--line); min-height:320px; }
  .empty-state { margin:50px auto; }
  .photo-gallery { grid-template-columns:repeat(3, minmax(0, 1fr)); }
  .photo-item.panorama { grid-column:span 2; }
}
@media (max-width: 560px) {
  .topbar { display:block; }
  .header-actions { margin-top:10px; }
  .header-actions .btn { flex:1; text-align:center; font-size:.86rem; }
  .filter-grid { grid-template-columns:repeat(3, 1fr); }
  .map-panel { height:58vh; }
  .photo-gallery { grid-template-columns:repeat(2, minmax(0, 1fr)); }
  .photo-item.panorama { grid-column:1 / -1; }
}