/* Tile Wrapper */
.tile {
  width: var(--tile-size);
  height: var(--tile-size);
  perspective: 400px;
  background: #111;
  border-radius: 3px;
}

/* Inner Container */
.tile-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
}

/* Tile Faces */
.tile-front,
.tile-back {
  position: absolute;
  inset: 1px;
  backface-visibility: hidden;
  background: #222;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    inset 0 1px 3px rgba(0, 0, 0, 0.5),
    inset 0 -1px 1px rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.tile-front span,
.tile-back span {
  font-size: calc(var(--tile-size) * 0.52);
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  line-height: 1;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.tile-back {
  transform: rotateX(180deg);
}

/* Horizontal Split Line — the mechanical seam between top and bottom flaps */
.tile-front::after,
.tile-back::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

/* Highlight Sweep (metallic reflection) */
.tile-front::before,
.tile-back::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(255, 255, 255, 0.08) 45%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.08) 55%,
    transparent 100%
  );
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.1s;
}

/* --- Spinning state: carousel is advancing rapidly --- */
.tile.spinning .tile-inner {
  will-change: transform;
}

/* Enhance seam during spin — flaps physically separating */
.tile.spinning .tile-front::after {
  background: rgba(0, 0, 0, 0.6);
  height: 1.5px;
}

/* Brief flash of metallic reflection as each flap falls */
.tile.spinning .tile-front::before {
  opacity: 0.4;
}

/* --- Settling state: final flap bouncing into place --- */
.tile.settling .tile-inner {
  will-change: transform;
}

.tile.settling .tile-front::before {
  opacity: 1;
  transition: opacity 0.15s;
}