:root{
  --bg1:#f7f7fb;
  --bg2:#ffffff;
  --text:#111;
  --muted:#666;
  --border:#e6e6ef;
  --shadow:0 1px 2px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  color:var(--text);
  background:linear-gradient(180deg,var(--bg1),var(--bg2));
  font-size:20px;
}
.nav{
  position:sticky;top:0;z-index:30;
  backdrop-filter:blur(10px);
  background:rgba(255,255,255,.9);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1700px;height:56px;margin:0 auto;padding:0 16px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-left{display:flex;align-items:center;gap:12px}
.nav-logo{width:32px;height:32px;border-radius:12px;background:#111}
.nav-title{font-weight:700;font-size:16px}
.nav-crumb{font-size:15px;color:var(--muted)}

.page{max-width:2200px;margin:0 auto;padding:20px 16px 40px;min-height:0}
.card{
  margin-top:12px;height:calc(100vh - 116px);border:1px solid var(--border);
  border-radius:18px;background:#fff;box-shadow:var(--shadow);overflow:hidden;
}
.layout{
  display:grid;grid-template-columns:1fr minmax(480px,560px);
  height:100%;min-height:0;overflow:hidden;
}
.viz-wrap{position:relative;min-height:0;height:100%;background:transparent !important}
.viz{position:relative;height:100%}
.heatmap-wrap{overflow:auto}
#heatmap{width:100%;display:block}

.legend-panel{
  position:absolute;right:12px;bottom:12px;z-index:10;min-width:320px;
  padding:12px 14px;border-radius:16px;border:1px solid var(--border);
  background:rgba(255,255,255,.9);box-shadow:var(--shadow);
}
.legend-title{font-weight:700;font-size:16px;margin-bottom:6px}
.legend-subtitle{font-weight:600;font-size:14px;color:#333;margin-bottom:8px}
.legend-note{font-size:13px;color:#444;margin-top:10px;font-weight:600}
.legend-svg{width:100%;height:auto;display:block}

.side{border-left:1px solid var(--border);padding:14px;overflow-y:scroll;background:#fff}
.side-controls,.chart-card{
  border:1px solid var(--border);background:#fff;border-radius:16px;padding:14px;
  box-shadow:var(--shadow);margin-bottom:14px;
}
.section-heading{font-size:20px !important;font-weight:700;line-height:1.25;color:#111;margin:0;padding:0 0 10px 0}
.section-heading-spaced{margin-top:14px}
.controls-title{font-size:20px}
.control{display:flex;flex-direction:column;gap:6px;font-size:16px}
.control span{font-size:15px;color:#444;font-weight:600}
.control select,.control input,.search input{
  border:1px solid var(--border);border-radius:12px;padding:10px 12px;font-size:18px;background:#fff;
}
.filter-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;align-items:end}
.tab-row{display:flex;gap:8px;flex-wrap:wrap}
.toggle-btn{
  border:1px solid var(--border);background:#fff;border-radius:12px;padding:8px 10px;
  font-size:14px;cursor:pointer;
}
.toggle-btn:hover{background:#f6f6fa}
.toggle-btn.is-active{border-color:rgba(0,0,0,.18);box-shadow:var(--shadow);font-weight:700}
.search{display:flex;gap:8px;margin-top:6px}
.search input{flex:1}
.search button{
  border:1px solid var(--border);border-radius:12px;padding:8px 12px;background:#fff;cursor:pointer;
  font-size:17px;
  white-space:nowrap;
}
.search button:hover{background:#f6f6fa}

.download-card{display:flex;flex-direction:column;justify-content:flex-end;min-height:150px}
.download-row{margin-top:10px;display:flex;gap:14px;justify-content:flex-end}
.chart-download-row{margin-top:auto;justify-content:flex-end;padding:0}
.vertical-downloads{flex-direction:column;align-items:flex-end;gap:10px}
.download-link{
  border:none;background:none;padding:0;font-size:15px;color:#444;cursor:pointer;text-decoration:underline;
}
.download-link:hover{color:#111}

.tooltip{
  position:absolute;z-index:20;min-width:230px;max-width:280px;padding:10px 12px;border-radius:16px;
  border:1px solid var(--border);background:#fff;box-shadow:var(--shadow);font-size:13px;color:#333;
  pointer-events:none;
}
.tooltip-title{font-weight:700;font-size:14px;margin-bottom:6px}
.tooltip-row{margin-top:4px}
.error{
  margin-top:12px;padding:12px;border:1px solid #f3b4b4;background:#fff1f1;
  color:#8a1f1f;border-radius:14px;font-size:13px;
}
.hidden{display:none}

.group-label{font-size:16px;font-weight:700;cursor:pointer}
.group-toggle{font-size:16px;cursor:pointer;fill:#333}
.row-label{font-size:13px;fill:#111}
.axis-title{font-size:15px;fill:#555;font-weight:600}
.axis-subtitle{font-size:16px;fill:#333;font-weight:700}
.axis-tick-label{font-size:11px;fill:#555}
.group-divider{stroke:rgba(0,0,0,.08);stroke-width:1}
.cell{cursor:pointer}
.cell.active{stroke:#111;stroke-width:2px}
.search-dim{opacity:.18}
.prepost-band{fill:#fafafe}
.prepost-divider{stroke:rgba(0,0,0,.14);stroke-width:1.2;stroke-dasharray:4 4}

@media (max-width:1300px){
  .layout{grid-template-columns:1fr;height:auto;overflow:visible}
  .side{border-left:none;border-top:1px solid var(--border);overflow:visible}
  .viz-wrap{min-height:70vh}
  .viz{height:70vh}
}
@media (max-width:900px){
  .filter-row{grid-template-columns:1fr}
  .legend-panel{min-width:240px;max-width:calc(100% - 24px)}
}