* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: #e9edf2;
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: #1f2430; }
#app { position: fixed; inset: 0; }
#app canvas { display: block; }
.labels { position: absolute; inset: 0; pointer-events: none; }

#panel { position: fixed; top: 12px; left: 12px; bottom: 12px; width: 292px; overflow-y: auto;
  background: rgba(255,255,255,.86); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(0,0,0,.08); border-radius: 14px; padding: 16px 16px 12px;
  box-shadow: 0 8px 30px rgba(20,30,50,.12); transition: transform .25s ease; z-index: 5; }
#panel.hidden { transform: translateX(calc(-100% - 24px)); }
#panelToggle { position: fixed; top: 14px; left: 316px; z-index: 6; width: 34px; height: 34px;
  border-radius: 9px; border: 1px solid rgba(0,0,0,.1); background: rgba(255,255,255,.9);
  font-size: 16px; cursor: pointer; transition: left .25s ease; }
#panel.hidden + #panelToggle { left: 14px; }

header .eyebrow { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: #c0306f; font-weight: 600; }
header h1 { margin: 2px 0 0; font-size: 20px; letter-spacing: -.01em; }
header .sub { color: #5b6270; margin-top: 2px; }
section { margin-top: 16px; }
h2 { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: #7a8190; margin: 0 0 8px; font-weight: 600; }

.seg { display: flex; gap: 4px; margin-bottom: 8px; }
.seg button { flex: 1; padding: 7px 0; border-radius: 8px; border: 1px solid #d5d9e0; background: #fff;
  font: inherit; font-weight: 600; cursor: pointer; color: #333a46; }
.seg button.on { background: #1f2430; color: #fff; border-color: #1f2430; }
.check { display: flex; align-items: center; gap: 8px; padding: 3px 0; cursor: pointer; }
.range { display: block; margin-top: 6px; }
.range span { float: right; color: #6b7280; font-variant-numeric: tabular-nums; }
.range input { width: 100%; margin-top: 4px; }

#controlList { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
#controlList li { display: flex; align-items: center; gap: 6px; padding: 5px 7px; border-radius: 8px;
  cursor: pointer; border: 1px solid transparent; }
#controlList li:hover { background: #fff; border-color: #e3e6eb; }
#controlList li.active { background: #fbe7f1; border-color: #f1b5d3; }
#controlList .num { min-width: 22px; height: 22px; border-radius: 50%; border: 2px solid #c0308a; color: #c0308a;
  display: grid; place-items: center; font-weight: 700; font-size: 11px; }
#controlList .meta { color: #6b7280; font-size: 11px; }
#controlList li.wide { grid-column: span 2; }

.legend div { display: flex; align-items: center; gap: 8px; padding: 2px 0; }
.legend i { width: 14px; height: 14px; border-radius: 3px; flex: none; border: 1px solid rgba(0,0,0,.12); }
footer { margin-top: 16px; color: #7a8190; font-size: 11px; }

/* 3D labels */
.lbl-control { pointer-events: auto; cursor: pointer; transform: translateY(-4px);
  background: #fff; border: 2px solid #c0308a; color: #a3216f; border-radius: 999px;
  padding: 1px 8px 1px 3px; font-weight: 700; white-space: nowrap; box-shadow: 0 2px 6px rgba(0,0,0,.15);
  display: flex; align-items: center; gap: 5px; font-size: 12px; }
.lbl-control b { background: #c0308a; color: #fff; border-radius: 999px; min-width: 20px; height: 20px;
  display: grid; place-items: center; font-size: 11px; }
.lbl-control small { color: #8a5878; font-weight: 600; }
.lbl-control.active { background: #c0308a; color: #fff; }
.lbl-control.active small { color: #ffd5ea; }
.lbl-control.active b { background: #fff; color: #c0308a; }
.lbl-stair { font-weight: 800; font-size: 12px; color: #b0287a; background: rgba(255,255,255,.9);
  border-radius: 5px; padding: 0 5px; border: 1px solid #e7b6d1; }
.lbl-floor { font-weight: 800; font-size: 34px; color: #3a86d1; text-shadow: 0 1px 0 #fff, 0 0 12px rgba(255,255,255,.9);
  letter-spacing: -.02em; }
.lbl-floor small { display: block; font-size: 11px; font-weight: 700; color: #6c8fb4; letter-spacing: .08em;
  text-transform: uppercase; text-align: center; margin-top: -4px; }
.lbl-note { font-size: 11px; font-weight: 600; color: #a3346f; background: rgba(255,255,255,.88);
  border-radius: 6px; padding: 2px 6px; border: 1px solid #f3c1dc; white-space: nowrap; }
.hide-labels .lbl-control, .hide-labels .lbl-stair, .hide-labels .lbl-note { display: none !important; }

@media (max-width: 640px) {
  #panel { width: auto; right: 12px; bottom: auto; max-height: 60vh; }
  #panelToggle { left: auto; right: 14px; }
  #panel.hidden + #panelToggle { left: auto; }
}