/* ═══════════════════════════════════════════════════════════
   anim3d.css — Shuters Learn Animations
   Scroll reveals · 3D tilt · Particle canvas · Hero float · Timeline
   ═══════════════════════════════════════════════════════════ */

/* ── SCROLL REVEAL BASE STATES ──────────────────────────── */
.reveal-up {
  opacity: 0;
  transform: perspective(900px) rotateX(18deg) translateY(46px);
  transition: opacity 0.85s cubic-bezier(0.16,1,0.3,1), transform 0.85s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--d, 0ms);
}
.reveal-left {
  opacity: 0;
  transform: perspective(900px) rotateY(-22deg) translateX(-54px);
  transition: opacity 0.85s cubic-bezier(0.16,1,0.3,1), transform 0.85s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--d, 0ms);
}
.reveal-right {
  opacity: 0;
  transform: perspective(900px) rotateY(22deg) translateX(54px);
  transition: opacity 0.85s cubic-bezier(0.16,1,0.3,1), transform 0.85s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--d, 0ms);
}
.reveal-scale {
  opacity: 0;
  transform: perspective(900px) scale(0.85) translateZ(-50px) rotateX(10deg);
  transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--d, 0ms);
}
.reveal-flip {
  opacity: 0;
  transform: perspective(900px) rotateY(-90deg) translateX(-20px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
  transition-delay: var(--d, 0ms);
}
.reveal-up.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible,
.reveal-flip.is-visible {
  opacity: 1;
  transform: perspective(900px) rotateX(0) rotateY(0) translateX(0) translateY(0) translateZ(0) scale(1);
}

/* ── SECTION PARTICLE CANVAS ────────────────────────────── */
.pnet-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  display: block;
}

/* ── TILT CARDS ─────────────────────────────────────────── */
[data-tilt] {
  will-change: transform;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s;
}

/* ── HERO CARD FLOAT ANIMATION ──────────────────────────── */
.hero-card {
  animation: heroFloat var(--float-dur, 4.2s) ease-in-out infinite alternate;
  animation-delay: var(--float-delay, 0s);
}
@keyframes heroFloat {
  from { transform: translateY(0) rotateZ(var(--rz-from, -1deg)); }
  to   { transform: translateY(-12px) rotateZ(var(--rz-to, 1.5deg)); }
}

/* ── TIMELINE LINE REVEAL ───────────────────────────────── */
.timeline { position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, #6C2D9C 0%, rgba(108,45,156,0.05) 100%);
  z-index: 0;
  transform-origin: top;
  transform: scaleY(0);
  transition: transform 1.4s cubic-bezier(0.16,1,0.3,1) 0.3s;
}
.timeline.is-visible::before { transform: scaleY(1); }
.tl-dot {
  position: relative;
  z-index: 1;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.3s;
}
.tl-item:hover .tl-dot {
  transform: scale(1.5);
  box-shadow: 0 0 0 6px rgba(108,45,156,0.18), 0 0 0 12px rgba(108,45,156,0.07);
}
.tl-year { transition: color 0.3s, transform 0.3s; }
.tl-item:hover .tl-year { color: #6C2D9C; transform: translateX(4px); }

/* ── CARD HOVER TRANSITION ──────────────────────────────── */
.step-card   { transition: transform 0.45s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s; }
.bundle-card { transition: transform 0.45s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s; }
.team-card   { transition: transform 0.45s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s; }

/* ── REDUCED MOTION ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .reveal-up, .reveal-left, .reveal-right, .reveal-scale, .reveal-flip {
    opacity: 1 !important; transform: none !important; transition: none !important;
  }
  .hero-card { animation: none !important; }
  [data-tilt] { transform: none !important; transition: none !important; }
  .timeline::before { transition: none !important; transform: scaleY(1) !important; }
}