:root {
  --bg: #1f2933;
  --panel: #27313c;
  --panel-2: #2f3b48;
  --accent: #3ba88f;
  --accent-hover: #45c2a4;
  --danger: #c0564a;
  --danger-hover: #d56456;
  --text: #e8edf1;
  --text-dim: #9aa7b3;
  --border: #3a4654;
  --sidebar-w: 340px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: "Noto Sans TC", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
}

#app {
  position: fixed;
  inset: 0;
  display: flex;
  height: 100vh;
  height: 100dvh; /* iPad/手機 Safari 動態視窗高度,避免只佔半屏 */
  width: 100vw;
  overflow: hidden;
}

/* ---------- Sidebar ---------- */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100%;
  background: var(--bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.brand {
  padding: 18px 18px 12px;
  border-bottom: 1px solid var(--border);
}
.brand h1 {
  margin: 0;
  font-size: 19px;
  letter-spacing: 1px;
}
.subtitle {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-dim);
}

.panel {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.panel h2 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---------- Search ---------- */
.search-row {
  display: flex;
  gap: 6px;
}
#search-input {
  flex: 1;
  min-width: 0;
  padding: 8px 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}
#search-input:focus {
  outline: none;
  border-color: var(--accent);
}
#search-btn {
  padding: 8px 14px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}
#search-btn:hover { background: var(--accent-hover); }

.status {
  margin: 8px 0 0;
  font-size: 12px;
  min-height: 16px;
  color: var(--text-dim);
}
.status.error { color: var(--danger-hover); }
.status.ok { color: var(--accent-hover); }

/* ---------- Radio / switch ---------- */
.radio-group label,
.switch-row,
.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  padding: 5px 0;
  cursor: pointer;
}
.radio-group label { line-height: 1.3; }

.slider-row {
  flex-wrap: wrap;
  margin-top: 6px;
}
.slider-row input[type="range"] {
  flex: 1;
  min-width: 120px;
  accent-color: var(--accent);
}
#luimap-opacity-val {
  font-variant-numeric: tabular-nums;
  color: var(--accent-hover);
}

/* ---------- Tool buttons ---------- */
.btn-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tool-btn {
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
}
.tool-btn:hover { background: #36434f; }
.tool-btn.active {
  border-color: var(--accent);
  background: #2c4a44;
}
.tool-btn.danger:hover {
  background: #5a2f2a;
  border-color: var(--danger);
}

.hint {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ---------- Area result ---------- */
.area-result {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.area-value {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent-hover);
  font-variant-numeric: tabular-nums;
}
.area-unit {
  font-size: 14px;
  color: var(--text-dim);
}

#green-btn,
#ai-btn {
  width: 100%;
  margin-bottom: 10px;
}

.ai-output {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text);
}
.ai-output p { margin: 0 0 8px; }
.ai-output .ai-loading { color: var(--accent-hover); }
.ai-output .ai-err { color: var(--text-dim); font-size: 12px; }
.ai-output code {
  background: var(--panel-2);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 12px;
}

/* AI 報告 Markdown 樣式 */
.ai-output h1 { font-size: 16px; margin: 2px 0 8px; }
.ai-output h2 {
  font-size: 14px;
  margin: 14px 0 6px;
  color: var(--accent-hover);
  border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
}
.ai-output h3 { font-size: 13px; margin: 10px 0 4px; }
.ai-output ul,
.ai-output ol { margin: 4px 0 8px; padding-left: 18px; }
.ai-output li { margin: 2px 0; }
.ai-output strong { color: var(--text); }
.ai-output hr { border: none; border-top: 1px solid var(--border); margin: 10px 0; }
.ai-output table {
  width: 100%;
  border-collapse: collapse;
  margin: 6px 0 10px;
  font-size: 12px;
}
.ai-output th,
.ai-output td {
  border: 1px solid var(--border);
  padding: 4px 6px;
  text-align: left;
  vertical-align: top;
}
.ai-output th { background: var(--panel-2); }

/* ---------- 人口指標 ---------- */
.info-region {
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text);
}
.info-region b {
  color: var(--accent-hover);
  font-size: 15px;
}
.indicators {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.indicators:empty {
  display: none;
}
.ind {
  background: var(--panel);
  padding: 7px 9px;
}
.ind dt {
  font-size: 11px;
  color: var(--text-dim);
  margin: 0 0 2px;
}
.ind dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.ind dd .u {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-dim);
}

.foot {
  margin-top: auto;
  padding: 14px 18px;
  font-size: 11px;
  color: var(--text-dim);
}
.foot p { margin: 2px 0; }

/* ---------- Map ---------- */
#map {
  flex: 1;
  height: 100%;
}

/* Leaflet popup tweak for dark theme legibility kept default */

@media (max-width: 720px) {
  #app { flex-direction: column; }
  #sidebar {
    width: 100%;
    min-width: 0;
    height: 45%;
  }
  #map { height: 55%; }
}

/* ---------- 版權 / 匯出 ---------- */
#export-btn { width: 100%; margin-top: 8px; }
.credits-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  font-size: 12px;
  color: var(--text-dim);
}
.credits-list li { margin: 3px 0; line-height: 1.4; }
.disclaimer {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 0;
}

/* 列印報告容器:螢幕隱藏,列印時顯示 */
#print-area { display: none; }
@media print {
  #app { display: none !important; }
  #print-area { display: block; }
  body { background: #fff; color: #111; }
  .pr-doc { font-size: 12px; color: #111; max-width: 720px; margin: 0 auto; }
  .pr-doc h1 { font-size: 20px; margin: 0 0 6px; }
  .pr-doc h2 {
    font-size: 14px;
    margin: 14px 0 4px;
    border-bottom: 1px solid #888;
    padding-bottom: 2px;
  }
  .pr-meta { font-size: 12px; color: #444; margin: 0 0 8px; }
  .pr-doc table { width: 100%; border-collapse: collapse; margin: 4px 0 8px; }
  .pr-doc th,
  .pr-doc td { border: 1px solid #bbb; padding: 3px 6px; text-align: left; font-size: 12px; }
  .pr-doc > table th { background: #f0f0f0; width: 45%; font-weight: 600; }
  .pr-ai p { margin: 0 0 6px; }
  .pr-ai h2 { font-size: 13px; }
  .pr-ai table { width: 100%; border-collapse: collapse; }
  .pr-ai th,
  .pr-ai td { border: 1px solid #bbb; padding: 3px 6px; }
  .pr-src { font-size: 10px; color: #555; }
  .pr-muted { color: #888; }
}