/* Fullscreen, behind everything */
html, body {
  height: 100%;
  margin: 0;
}
#office-bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -1; /* Behind your app */
  display: block;
}

/* Demo UI (remove in production) */
.demo-ui {
  position: fixed;
  top: 16px;
  left: 16px;
  padding: 12px 14px;
  backdrop-filter: blur(8px);
  background: rgba(20,20,28,0.35);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  color: #fff;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  z-index: 10;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
.demo-ui h1 {
  font-size: 16px;
  margin: 0 0 8px 0;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
label {
  font-size: 12px;
  display: flex;
  gap: 6px;
  align-items: center;
  background: rgba(255,255,255,0.06);
  padding: 6px 8px;
  border-radius: 10px;
}
select, input[type="number"] {
  border: none;
  outline: none;
  padding: 6px 8px;
  border-radius: 8px;
  background: rgba(255,255,255,0.9);
}
input[type="checkbox"] {
  transform: scale(1.1);
}