:root {
  --bg: #0f1216;
  --panel: rgba(20, 24, 30, 0.92);
  --panel-border: #2a3038;
  --fg: #e7ecf1;
  --muted: #9aa6b2;
  --accent: #f4a544;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

#map, #cesiumContainer { position: absolute; inset: 0; width: 100%; height: 100%; }

.topbar {
  position: absolute; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  padding: 10px 16px; background: linear-gradient(180deg, rgba(10,12,15,0.9), rgba(10,12,15,0));
}
.topbar .brand { font-weight: 700; letter-spacing: 0.2px; }
.topbar nav { display: flex; gap: 12px; }
.topbar nav a { padding: 4px 10px; border-radius: 6px; border: 1px solid transparent; color: var(--muted); }
.topbar nav a.active { color: var(--fg); border-color: var(--panel-border); background: var(--panel); }

.panel {
  position: absolute; z-index: 20; top: 58px; right: 14px; width: 300px;
  background: var(--panel); border: 1px solid var(--panel-border); border-radius: 10px;
  padding: 14px 16px; backdrop-filter: blur(6px); box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}
.panel h2 { margin: 0 0 6px; font-size: 14px; }
.panel .sub { color: var(--muted); font-size: 12px; margin-bottom: 12px; }
.ctrl { margin: 14px 0; }
.ctrl label { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.ctrl label b { color: var(--fg); font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.row { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.badge { display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 999px;
  border: 1px solid var(--panel-border); color: var(--muted); }
.badge.live { color: #7ee787; border-color: #23502f; }
.badge.mock { color: var(--accent); border-color: #5a4218; }
.toggle { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--fg); }
.btn { width: 100%; padding: 8px 10px; font-size: 13px; cursor: pointer;
  color: var(--fg); background: #1a1f26; border: 1px solid var(--panel-border);
  border-radius: 8px; transition: border-color .15s, background .15s; }
.btn:hover { border-color: var(--accent); background: #222836; }
.btn:active { background: #2a3140; }

.legend { margin-top: 14px; }
.legend .bar { height: 12px; border-radius: 6px;
  background: linear-gradient(90deg,
    rgb(33,102,172) 0%, rgb(103,169,207) 35%, rgb(255,255,191) 55%,
    rgb(244,165,68) 75%, rgb(178,24,43) 100%); }
.legend .ticks { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; margin-top: 4px; }

.hint { font-size: 11px; color: var(--muted); margin-top: 10px; line-height: 1.4; }

.hero { max-width: 860px; margin: 0 auto; padding: 8vh 24px; }
.hero h1 { font-size: 30px; margin: 0 0 6px; }
.hero p.lead { color: var(--muted); font-size: 16px; margin: 0 0 28px; }
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 720px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--panel); border: 1px solid var(--panel-border); border-radius: 12px;
  padding: 20px; transition: border-color .15s, transform .15s; display: block; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.card h3 { margin: 0 0 6px; color: var(--fg); }
.card p { margin: 0; color: var(--muted); font-size: 13px; }
.note { margin-top: 26px; font-size: 12px; color: var(--muted); }
code { background: #1a1f26; padding: 1px 6px; border-radius: 4px; color: #cbd5e1; }