:root {
  --bg: #08111d;
  --panel: rgba(8, 17, 29, .88);
  --panel-strong: rgba(10, 23, 39, .96);
  --line: rgba(165, 196, 224, .18);
  --text: #f4f8fc;
  --muted: #9fb1c3;
  --accent: #58d6c7;
  --accent-strong: #20b8aa;
  --danger: #ff746c;
  --shadow: 0 18px 50px rgba(0, 0, 0, .34);
  --radius: 14px;
  color-scheme: dark;
  font-family: Inter, "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body, #app, #cesiumContainer { width: 100%; height: 100%; margin: 0; overflow: hidden; }
body { background: var(--bg); color: var(--text); }
button, input, textarea { font: inherit; }
button { color: inherit; }
[hidden] { display: none !important; }

.glass { background: var(--panel); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(16px); }
.app-header { position: fixed; z-index: 20; top: 18px; left: 18px; height: 60px; padding: 9px 14px 9px 10px; border-radius: var(--radius); display: flex; align-items: center; gap: 10px; }
.brand-mark { display: grid; place-items: center; width: 40px; height: 40px; color: #06131a; background: linear-gradient(135deg, #8cf1df, #39beaf); border-radius: 11px; font-weight: 900; letter-spacing: -.06em; }
.brand-copy { display: grid; gap: 3px; min-width: 135px; }
.brand-copy strong { font-size: 15px; letter-spacing: .08em; }
.brand-copy span, .status-bar { color: var(--muted); font-size: 12px; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(88, 214, 199, .12); }
.status-dot.loading { animation: pulse 1.3s ease-in-out infinite; }

.display-controls { position: fixed; z-index: 20; top: 18px; left: 50%; width: 370px; min-height: 60px; padding: 8px 12px; border-radius: var(--radius); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); transform: translateX(-50%); }
.display-control { min-width: 0; padding: 0 12px; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-content: center; gap: 3px 8px; color: var(--muted); font-size: 11px; }
.display-control + .display-control { border-left: 1px solid var(--line); }
.display-control output { color: var(--text); font-size: 11px; font-variant-numeric: tabular-nums; }
.display-control input[type="range"] { grid-column: 1 / -1; width: 100%; height: 16px; padding: 0; accent-color: var(--accent); cursor: pointer; }

.tool-rail { position: fixed; z-index: 20; top: 96px; left: 18px; width: 64px; padding: 7px; border-radius: var(--radius); }
.tool-group { display: grid; gap: 4px; }
.tool-button, .icon-button { border: 0; background: transparent; cursor: pointer; transition: .18s ease; }
.tool-button { width: 48px; min-height: 51px; padding: 6px 2px; border-radius: 10px; display: grid; place-items: center; gap: 2px; color: var(--muted); }
.tool-button span { font-size: 21px; line-height: 1; font-style: normal; }
.tool-button em { font-size: 10px; font-style: normal; }
.tool-button:hover, .tool-button.active { color: var(--text); background: rgba(88, 214, 199, .14); }
.tool-button.active { outline: 1px solid rgba(88, 214, 199, .44); }
.tool-divider { height: 1px; margin: 6px 5px; background: var(--line); }

.top-actions { position: fixed; z-index: 20; top: 18px; right: 18px; padding: 6px; border-radius: 12px; display: flex; gap: 2px; }
.icon-button { display: inline-grid; place-items: center; min-width: 42px; min-height: 42px; border-radius: 9px; color: var(--muted); font-size: 18px; }
.icon-button:hover { color: var(--text); background: rgba(255,255,255,.08); }

.side-panel { position: fixed; z-index: 25; top: 78px; right: 18px; bottom: 58px; width: min(360px, calc(100vw - 112px)); border-radius: var(--radius); overflow: hidden; }
.panel-header, .app-dialog header { min-height: 76px; padding: 17px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.panel-header h2, .app-dialog h2 { margin: 3px 0 0; font-size: 19px; }
.eyebrow { color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.panel-content { height: calc(100% - 76px); padding: 16px; overflow: auto; }

.status-bar { position: fixed; z-index: 20; left: 94px; right: 18px; bottom: 14px; min-height: 34px; padding: 8px 13px; border-radius: 10px; display: grid; grid-template-columns: 150px 1fr auto; align-items: center; gap: 14px; }
#status-message { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#cursor-position { font-variant-numeric: tabular-nums; }

.toast-region { position: fixed; z-index: 80; right: 18px; bottom: 64px; width: min(340px, calc(100vw - 36px)); display: grid; gap: 8px; pointer-events: none; }
.toast { padding: 13px 15px; color: var(--text); background: var(--panel-strong); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 10px; box-shadow: var(--shadow); animation: toast-in .2s ease-out; }
.toast.error { border-left-color: var(--danger); }

.app-dialog { width: min(520px, calc(100vw - 32px)); padding: 0; color: var(--text); background: var(--panel-strong); border: 1px solid var(--line); border-radius: 17px; box-shadow: var(--shadow); }
.app-dialog::backdrop { background: rgba(0, 7, 13, .68); backdrop-filter: blur(3px); }
.app-dialog form { margin: 0; }
.dialog-content { padding: 20px; color: var(--muted); line-height: 1.7; }
.app-dialog footer { padding: 14px 18px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 10px; }
.form-grid { display: grid; gap: 16px; }
.form-grid label { display: grid; gap: 7px; color: var(--text); font-size: 13px; }
input, textarea, select { width: 100%; padding: 11px 12px; color: var(--text); background: rgba(255,255,255,.055); border: 1px solid var(--line); border-radius: 9px; outline: none; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(88,214,199,.11); }
.primary-button, .secondary-button { min-height: 42px; padding: 0 16px; border-radius: 9px; cursor: pointer; }
.primary-button { color: #041714; background: var(--accent); border: 0; font-weight: 800; }
.secondary-button { color: var(--text); background: transparent; border: 1px solid var(--line); }
.mobile-only { display: none; }
.settings-grid { display: grid; gap: 22px; }
.settings-grid label { display: grid; grid-template-columns: 1fr auto; gap: 10px; color: var(--text); font-size: 13px; }
.settings-grid input[type="range"] { grid-column: 1 / -1; padding: 0; accent-color: var(--accent); }
.settings-grid .switch-row { display: flex; align-items: center; justify-content: space-between; }
.settings-grid input[type="checkbox"] { width: 42px; height: 22px; accent-color: var(--accent); }
.panel-note { margin: 0; padding: 12px; color: var(--muted); background: rgba(255,255,255,.045); border-radius: 9px; font-size: 12px; line-height: 1.6; }
.panel-toolbar { min-height: 44px; margin-bottom: 13px; display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--muted); font-size: 12px; }
.panel-toolbar > div { display: flex; gap: 6px; }
.small-button, .card-actions button { min-height: 30px; padding: 0 9px; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 7px; cursor: pointer; }
.small-button:hover, .card-actions button:hover { color: var(--text); border-color: rgba(88,214,199,.5); }
.primary-button.compact { min-height: 36px; padding: 0 12px; font-size: 12px; }
.card-list { display: grid; gap: 9px; }
.list-card { padding: 13px; background: rgba(255,255,255,.045); border: 1px solid transparent; border-radius: 11px; display: grid; gap: 11px; transition: .16s ease; }
.list-card:hover { background: rgba(255,255,255,.065); border-color: var(--line); }
.list-card-main { min-width: 0; display: grid; gap: 4px; }
.list-card-main strong { font-size: 14px; overflow: hidden; text-overflow: ellipsis; }
.list-card-main small { color: var(--accent); font-size: 10px; }
.list-card-main p { margin: 4px 0 0; color: var(--muted); font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.card-actions { display: flex; gap: 6px; }
.view-card { grid-template-columns: 32px 1fr; align-items: center; }
.view-card .card-actions { grid-column: 2; }
.view-index { color: rgba(88,214,199,.55); font: 800 15px/1 monospace; }
.empty-state { min-height: 220px; padding: 28px; display: grid; place-content: center; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 12px; }
.empty-state b { color: var(--text); }
.empty-state p { max-width: 220px; font-size: 12px; line-height: 1.6; }
.help-list p { margin: 0 0 14px; }
.help-list strong { color: var(--text); }
.error-detail { max-height: 100px; overflow: auto; padding: 10px; font: 11px/1.5 monospace; background: rgba(255,116,108,.08); border-radius: 8px; }

.cesium-viewer-bottom, .cesium-viewer-toolbar { display: none !important; }

@keyframes pulse { 50% { opacity: .35; transform: scale(.75); } }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

@media (max-width: 900px) {
  .display-controls { top: 88px; width: min(390px, calc(100vw - 126px)); }
  .tool-rail { top: 166px; }
  .side-panel { top: 158px; }
}

@media (max-width: 680px) {
  .app-header { top: max(10px, env(safe-area-inset-top)); left: 10px; right: 10px; height: 56px; }
  .mobile-only { display: inline-grid; margin-left: auto; }
  .top-actions { top: 76px; right: 10px; }
  .display-controls { top: 132px; left: 10px; right: 10px; width: auto; min-width: 0; min-height: 62px; padding: 8px 10px; transform: none; }
  .display-control { padding: 0 9px; }
  .tool-rail { top: auto; left: 10px; right: 10px; bottom: calc(48px + env(safe-area-inset-bottom)); width: auto; padding: 6px; display: flex; overflow-x: auto; }
  .tool-rail { scrollbar-width: none; }
  .tool-rail::-webkit-scrollbar { display: none; }
  .tool-rail.collapsed { display: none; }
  .tool-group { display: flex; }
  .tool-divider { width: 1px; height: 40px; margin: 5px 4px; flex: 0 0 1px; }
  .tool-button { min-width: 50px; height: 48px; min-height: 48px; }
  .side-panel { top: 204px; left: 10px; right: 10px; bottom: calc(136px + env(safe-area-inset-bottom)); width: auto; }
  .status-bar { left: 10px; right: 10px; bottom: max(8px, env(safe-area-inset-bottom)); grid-template-columns: 1fr auto; }
  #status-message { display: none; }
  #cursor-position { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}