css/style.css

/* ===========================
   Global overlay scaffolding
   =========================== */
#xr-overlay-root {
  position: fixed;
  inset: 0;
  z-index: 9999;              /* Above site chrome */
  pointer-events: none;       /* Let underlying elements receive events unless explicitly enabled */
}

/* Message toast (bottom center) */
.pc-ar-msg {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 16px;
  z-index: 2;
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border-radius: 12px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.3;
  text-align: center;
  max-width: min(90vw, 640px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(4px);
  pointer-events: none;       /* Non-clickable */
  user-select: none;
}

/* ===========================
   AR Launch Button
   =========================== */
#ar-launch-btn {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 72px;               /* Sits above the message toast */
  z-index: 10001;
  pointer-events: auto;

  appearance: none;
  border: none;
  border-radius: 14px;
  padding: 12px 18px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: rgba(0, 0, 0, 0.85);
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
  backdrop-filter: blur(6px);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
#ar-launch-btn:active { transform: translateX(-50%) scale(0.98); }
#ar-launch-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Hidden anchor used for iOS Quick Look trigger (kept invisible) */
#ios-quicklook-anchor {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip-path: inset(50%) !important;
  pointer-events: none !important;
}

/* ===========================
   Vertical Rotation Slider UI
   =========================== */
/* Panel container */
.ar-ui {
  position: absolute;                /* inside #xr-overlay-root space */
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10000;
  pointer-events: auto;              /* Make this panel interactive */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;

  width: 56px;
  padding: 12px 10px;
  border-radius: 16px;

  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
  backdrop-filter: blur(6px);

  touch-action: none;  /* Prevent page scroll while sliding */
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.ar-ui .label {
  font-size: 12px;
  text-align: center;
  opacity: 0.95;
}

/* Big touch area for the slider */
.rotY-wrap {
  position: relative;
  width: 48px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;

  /* Critical: ensure slider grabs interactions and blocks scene drag beneath */
  pointer-events: auto;
  touch-action: none;
  overflow: visible;
}

/* The vertical rail (full height) */
.rotY-rail {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 2px;
  pointer-events: none; /* visual only */
}

/* The knob — centered on the rail */
.rotY-knob {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%); /* perfectly centered */
  top: 50%;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0,0,0,.35);

  will-change: top;
  pointer-events: none;   /* moved by JS, wrapper handles input */
}

/* Input range is hidden (we use it only to store the numeric value) */
.ar-ui input[type="range"].rotY {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* Degree label below slider */
.ar-ui .val {
  font-size: 12px;
  opacity: 0.95;
}

/* ===========================
   Optional: container hints
   =========================== */
/* If you mount the canvas in a custom container (e.g., #my-ar), you can set a min height */
#ar-mount-fallback {
  position: relative;
  width: 100%;
  min-height: 70vh;        /* can be overridden inline on your site */
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

/* Make sure the canvas fills its mount container */
#ar-mount-fallback > #application-canvas,
#application-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}