/* ============================================
   3d.css — CSS 3D Transform Utility Classes
   Shared 3D foundation for Infiforge service websites.
   Provides lightweight 3D effects via pure CSS transforms —
   no WebGL required — as a base layer / fallback for all sites.
   ============================================ */

/* --- Perspective & preserve-3d context helpers --- */
.w3d-perspective { perspective: 1000px; }
.w3d-perspective-1600 { perspective: 1600px; }
.w3d-preserve { transform-style: preserve-3d; }
.w3d-flat { transform-style: flat; }
.w3d-backface { backface-visibility: hidden; }

/* --- Tilt card (CSS-only, no JS) ---
   Add .w3d-tilt to a card to get pointer-reactive tilt on desktop.
*/
.w3d-tilt {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  transform: perspective(1000px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}
@media (hover: hover) and (pointer: fine) {
  .w3d-tilt:hover {
    transform: perspective(1000px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateY(-4px);
  }
}

/* --- Lift-on-hover --- */
.w3d-lift {
  transition: transform 250ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 250ms ease;
  will-change: transform;
}
@media (hover: hover) and (pointer: fine) {
  .w3d-lift:hover {
    transform: translateY(-6px);
  }
}
.w3d-lift:focus-visible { transform: translateY(-6px); }

/* --- 3D float animation (gentle bob) --- */
@keyframes w3d-float {
  0%, 100% { transform: translateY(0) rotateX(0deg) rotateY(0deg); }
  50% { transform: translateY(-12px) rotateX(2deg) rotateY(2deg); }
}
.w3d-float { animation: w3d-float 6s ease-in-out infinite; }

@keyframes w3d-float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.w3d-float-slow { animation: w3d-float-slow 9s ease-in-out infinite; }

/* --- 3D spin (slow, for logos / symbols) --- */
@keyframes w3d-spin-y {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}
.w3d-spin-y { animation: w3d-spin-y 24s linear infinite; transform-style: preserve-3d; }

/* --- 3D layer stacking (parallax children) --- */
.w3d-layer { position: relative; transform-style: preserve-3d; }
.w3d-layer > * { position: absolute; }

/* --- Depth offsets (translateZ for true 3D layering) --- */
.w3d-z0 { transform: translateZ(0); }
.w3d-z1 { transform: translateZ(20px); }
.w3d-z2 { transform: translateZ(40px); }
.w3d-z3 { transform: translateZ(80px); }
.w3d-neg-z1 { transform: translateZ(-20px); }
.w3d-neg-z2 { transform: translateZ(-40px); }

/* --- Hero visual container sizing --- */
.w3d-hero-visual {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 260px;
  perspective: 1200px;
}

/* --- 3D canvas container (for Three.js scenes) --- */
.w3d {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.w3d canvas { display: block; width: 100% !important; height: 100% !important; }

/* --- Loader --- */
.w3d-loader {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: inherit;
  z-index: 2;
  pointer-events: none;
}
.w3d-loader__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(128, 128, 128, 0.25);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: w3d-spin 0.9s linear infinite;
  color: var(--color-accent, #888);
}
@keyframes w3d-spin {
  to { transform: rotate(360deg); }
}

/* --- Progress bar --- */
.w3d-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(128, 128, 128, 0.15);
  overflow: hidden;
}
.w3d-progress__fill {
  height: 100%;
  width: 0;
  background: var(--color-accent, #888);
  transition: width 200ms ease;
}

/* --- FPS meter --- */
.w3d-fps {
  position: fixed;
  bottom: 12px;
  right: 12px;
  padding: 4px 10px;
  font: 12px/1.4 var(--font-mono, monospace);
  color: var(--color-text, #fff);
  background: rgba(0, 0, 0, 0.55);
  border-radius: 6px;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.7;
}
.w3d-fps::before { content: '⚡ '; }

/* --- Status / aria-live --- */
.w3d-status {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* --- Static fallback state --- */
.w3d--static { animation: none !important; transform: none !important; }

/* --- Reduced motion: kill all 3D motion, keep static layout --- */
@media (prefers-reduced-motion: reduce) {
  .w3d-float, .w3d-float-slow, .w3d-spin-y,
  .w3d-tilt, .w3d-loader__spinner {
    animation: none !important;
    transform: none !important;
    transition: none !important;
  }
  .w3d-perspective, .w3d-perspective-1600 { perspective: none; }
}

/* --- Touch / small screen: disable hover tilt, keep canvas full-bleed --- */
@media (hover: none) {
  .w3d-tilt { transition: none; }
}
@media (max-width: 640px) {
  .w3d-hero-visual { min-height: 220px; }
}

/* --- Print: hide decorative 3D --- */
@media print {
  .w3d, .w3d-hero-visual, .w3d-loader, .w3d-fps { display: none !important; }
}