:root {
  --bg: #0b1220;
  --panel: #131c2f;
  --panel-2: #18243d;
  --line: #293a5f;
  --txt: #eaf0fb;
  --muted: #9fb0d3;
  --ok: #4ade80;
  --warn: #f59e0b;
  --high: #f43f5e;
  --accent: #60a5fa;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top, #182742 0%, var(--bg) 55%);
  color: var(--txt);
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
}
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 14px;
}
.topbar, .summary, .controls, .city-panel, .ranking-panel, .footer {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}
.topbar h1 { margin: 0 0 4px; font-size: 24px; }
.topbar p { margin: 0; color: var(--muted); font-size: 13px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
#status { color: var(--muted); font-size: 12px; }
button, select {
  background: #0f172a;
  color: var(--txt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
}
.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
label { display: flex; gap: 8px; align-items: center; color: var(--muted); }
.summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.kpi {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}
.kpi-title { color: var(--muted); font-size: 12px; }
.kpi-value { font-size: 22px; font-weight: 700; margin-top: 6px; }
.kpi-sub { color: #c8d6f5; font-size: 12px; margin-top: 6px; }
.city-meta { color: var(--muted); margin-top: 4px; font-size: 13px; }
.profile-block {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: radial-gradient(circle at top, rgba(96,165,250,0.08), rgba(255,255,255,0.02) 52%), rgba(255,255,255,0.02);
}
.profile-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.profile-head h3 { margin: 0; font-size: 16px; }
.profile-meta { color: var(--muted); font-size: 12px; }
.heatmap-wrap { width: 100%; overflow-x: auto; }
.heatmap-frame { display: grid; gap: 10px; }
.heatmap-svg { width: 100%; height: auto; display: block; shape-rendering: geometricPrecision; }
.heatmap-axis { fill: var(--muted); font-size: 11px; }
.heatmap-title { fill: var(--txt); font-size: 12px; font-weight: 700; }
.heatmap-legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}
.heatmap-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.heatmap-swatch {
  width: 16px;
  height: 10px;
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.2) inset;
}
.heatmap-empty {
  min-height: 220px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 12px;
}
.daily-cards {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: rgba(255,255,255,0.02);
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 700;
}
.lv-high { background: rgba(244,63,94,.22); color: #fecdd3; }
.lv-mid { background: rgba(245,158,11,.2); color: #fde68a; }
.lv-low { background: rgba(74,222,128,.16); color: #bbf7d0; }
.ranking { display: grid; gap: 8px; margin-top: 10px; }
.rank-row {
  display: grid;
  grid-template-columns: 40px 1fr auto auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  background: rgba(255,255,255,.02);
}
.rank-num { color: var(--accent); font-weight: 700; }
.footer { color: var(--muted); font-size: 12px; line-height: 1.6; }
@media (max-width: 900px) {
  .summary { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
}