:root {
  --bg: #d6cfc0;
  --glow-ms: 400ms;
  --ink: #2b2620;
}

* { box-sizing: border-box; }

html, body { height: 100%; overflow: hidden; }

body {
  margin: 0;
  height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, sans-serif;
  display: grid;
  place-items: center;
}

main { width: 100%; }

.room {
  position: relative;
  width: min(100vw, 100dvh, 1200px);
  margin: 0 auto;
}

.room > img,
.room > svg {
  display: block;
  width: 100%;
  height: auto;
}

.room > img.glow,
.room > svg {
  position: absolute;
  inset: 0;
}

.room > img.base { position: relative; }

.glow {
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: screen; /* fallback */
  mix-blend-mode: plus-lighter;
  transition: opacity var(--glow-ms) ease;
}

.glow.active { opacity: 1; }

.hotspot polygon {
  fill: transparent;
  cursor: pointer;
}

.hotspot:focus { outline: none; }

.debug .hotspot polygon {
  fill: rgba(255, 0, 0, 0.15);
  stroke: red;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.tooltip {
  position: absolute;
  transform: translate(-50%, -100%);
  padding: 0.25rem 0.6rem;
  background: rgba(30, 26, 22, 0.85);
  color: #fff;
  font-size: 0.85rem;
  border-radius: 4px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--glow-ms) ease;
}

.tooltip.active { opacity: 1; }

.signature {
  position: fixed;
  left: 24px;
  bottom: 20px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 100;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--ink);
  opacity: 0.35;
  pointer-events: none;
  user-select: none;
  z-index: 10;
}