.perspective-grid-page {
  min-height: 100vh;
  background: #000;
  color: var(--foreground);
}

.perspective-grid-main {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
}

.perspective-grid-screen {
  box-sizing: border-box;
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  flex: 0 0 auto;
}

.perspective-grid-screen--black {
  background: #000;
}

.perspective-grid-screen--preview {
  background: #fff;
  overflow: hidden;
}

.perspective-grid-stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: #fff;
  overflow: hidden;
}

.perspective-grid-scene {
  position: absolute;
  inset: 0;
  perspective: 920px;
  perspective-origin: 50% 88%;
  touch-action: none;
}

.perspective-grid-fade {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(
    to top,
    rgba(255, 255, 255, 0) 18%,
    rgba(255, 255, 255, 0.55) 52%,
    #ffffff 82%
  );
}

.perspective-grid-floor-glow {
  position: absolute;
  left: 50%;
  bottom: -8%;
  z-index: 2;
  width: 120%;
  height: 42%;
  transform: translateX(-50%);
  pointer-events: none;
  background: radial-gradient(
    ellipse at 50% 100%,
    rgba(0, 0, 0, 0.06) 0%,
    rgba(0, 0, 0, 0.02) 38%,
    transparent 72%
  );
}

.perspective-grid-plane {
  position: absolute;
  left: 50%;
  bottom: -6%;
  width: max-content;
  transform-style: preserve-3d;
  transform: translateX(-50%) translateZ(40px) scale(1.28);
  will-change: transform;
}

.perspective-grid-yaw,
.perspective-grid-tilt {
  transform-style: preserve-3d;
  transform-origin: 50% 100%;
}

.perspective-grid-tilt {
  transform: rotateX(var(--pg-tilt, 42deg));
  will-change: transform;
}

.perspective-grid-track {
  display: flex;
  flex-direction: column;
  gap: var(--pg-gap, 28px);
  transform-style: preserve-3d;
  will-change: transform;
}

/* Pre-rasterized strip — painted once, cloned for the endless stitch. */
.perspective-grid-carpet {
  display: block;
  flex: 0 0 auto;
  max-width: none;
  height: auto;
  transform: translateZ(0);
  backface-visibility: hidden;
  pointer-events: none;
  user-select: none;
}

.perspective-grid-hero {
  position: absolute;
  left: 50%;
  bottom: 8%;
  z-index: 4;
  width: clamp(4.5rem, 9vw, 6.5rem);
  height: clamp(4.5rem, 9vw, 6.5rem);
  transform: translateX(-50%);
  border-radius: 1.35rem;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #4da3ff 0%, #1a7fe8 100%);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.45) inset,
    0 18px 40px rgba(26, 127, 232, 0.35),
    0 8px 18px rgba(0, 0, 0, 0.18);
  pointer-events: none;
}

.perspective-grid-hero img,
.perspective-grid-hero svg {
  width: 62%;
  height: 62%;
  filter: brightness(0) invert(1);
}

@media (max-width: 640px) {
  .perspective-grid-plane {
    transform: translateX(-50%) translateZ(20px) scale(1.22);
  }

  .perspective-grid-hero {
    bottom: 6%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .perspective-grid-plane,
  .perspective-grid-track {
    will-change: auto;
  }
}