/* logo3d.css — shared styles for the 3D spinning logo button */

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: 'Press Start 2P', monospace;
  overflow: hidden;
}
#root { height: 100%; }

/* ---------- Stage / backgrounds ---------- */
.stage {
  position: relative;
  height: 100vh;
  width: 100%;
  display: grid;
  place-items: center;
  perspective: 900px;
  perspective-origin: 50% 45%;
}
.stage[data-bg="dark"] {
  background: radial-gradient(120% 90% at 50% 30%, #2a2350 0%, #16122e 55%, #0c0a1c 100%);
}
.stage[data-bg="dark"]::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.stage[data-bg="light"] {
  background: radial-gradient(120% 90% at 50% 30%, #fbf7ef 0%, #e7ddcd 100%);
}
.stage[data-bg="transparent"] {
  background-color: #d9d9d9;
  background-image:
    linear-gradient(45deg, #bcbcbc 25%, transparent 25%),
    linear-gradient(-45deg, #bcbcbc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #bcbcbc 75%),
    linear-gradient(-45deg, transparent 75%, #bcbcbc 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

/* ---------- 3D logo button ---------- */
.btn3d {
  perspective: 900px;
  perspective-origin: 50% 45%;
  display: grid;
  place-items: center;
}
.floater {
  position: relative;
  width: var(--size);
  height: var(--height);
  transform-style: preserve-3d;
  animation: bob 2.8s ease-in-out infinite;
  cursor: pointer;
  outline: none;
}
.presser {
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .12s ease;
}
.floater:active .presser { transform: scale(.93); }

.logo3d {
  position: absolute; inset: 0;
  transform-style: preserve-3d;
  animation: spin var(--spin) linear infinite;
  will-change: transform;
}
.floater:hover .logo3d { animation-duration: calc(var(--spin) * .45); }

/* extruded body: stacked silhouettes of the logo */
.slab {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--bodyTop), var(--bodyBot));
  -webkit-mask: var(--logo) center / 100% 100% no-repeat;
  mask: var(--logo) center / 100% 100% no-repeat;
}

/* the two readable faces */
.face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
}
.face img {
  width: 100%; height: 100%;
  object-fit: contain;
  image-rendering: pixelated;
}

/* ---------- Keyframes ---------- */
@keyframes spin { to { transform: rotateY(360deg); } }
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(calc(var(--floatH) * -1)); }
}
@media (prefers-reduced-motion: reduce) {
  .logo3d, .floater { animation: none !important; }
}