/* AR Measurement Overlay */
#ar-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 99999;
  background: #000;
}
#ar-overlay canvas {
  display: block;
  width: 100%; height: 100%;
}
#ar-ui {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}
#ar-ui > * { pointer-events: auto; }
#ar-inst {
  background: rgba(0,0,0,0.65);
  color: #fff;
  padding: 0.5rem 1.2rem;
  border-radius: 24px;
  font-size: 0.9rem;
  text-align: center;
  backdrop-filter: blur(4px);
  max-width: 80%;
}
#ar-meas {
  background: rgba(0,0,0,0.7);
  color: #00ff00;
  padding: 0.5rem 1.2rem;
  border-radius: 16px;
  font-size: 1.1rem;
  font-weight: 700;
  backdrop-filter: blur(4px);
  white-space: nowrap;
}
#ar-meas span { margin: 0 0.15rem; }
#ar-wid, #ar-area { color: #ffaa00; }
#ar-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.3rem;
}
.ar-btn {
  background: rgba(255,255,255,0.9);
  border: none;
  border-radius: 24px;
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: #333;
  min-width: 72px;
}
.ar-btn-primary {
  background: #2563eb;
  color: #fff;
}
.ar-btn:active { transform: scale(0.95); }
.ar-btn[disabled] { opacity: 0.5; pointer-events: none; }

/* AR button in measure cards */
.ar-measure-btn {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.4rem 0;
  background: linear-gradient(135deg, #7c3aed, #2563eb);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}
.ar-measure-btn:hover { opacity: 0.9; }
.ar-measure-btn:active { transform: scale(0.97); }
.ar-measure-btn i { font-size: 0.9rem; }