/* ============================================
   IVORY — Animations & Scroll Effects
   Duration: 150-300ms micro, ≤400ms complex
   Easing: ease-out enter, ease-in exit
   Transform/opacity only — no width/height/top/left
   ============================================ */

/* ---- Keyframes ---- */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes heroReveal {
  from {
    opacity: 0;
    transform: translateY(24px);
    letter-spacing: 0.2em;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    letter-spacing: var(--tracking-tight);
  }
}

@keyframes lineGrow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgb(201 169 110 / 0.35); }
  50%      { box-shadow: 0 0 0 12px rgb(201 169 110 / 0); }
}

/* ---- Hero Decorative Animations ---- */

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-20px); }
}

@keyframes heroSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes heroRotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes heroPulseRing {
  0%, 100% { opacity: 0.6; transform: translateY(-50%) scale(1); }
  50%      { opacity: 1;   transform: translateY(-50%) scale(1.05); }
}

@keyframes heroDotPulse {
  0%, 100% { opacity: 0.1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(1.5); }
}

@keyframes heroWordIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes heroParticleRise {
  0%   { opacity: 0; transform: translateY(0) translateX(0); }
  10%  { opacity: 0.3; }
  50%  { opacity: 0.15; }
  90%  { opacity: 0; }
  100% { opacity: 0; transform: translateY(-100vh) translateX(30px); }
}

/* ---- Scroll-triggered reveal classes ---- */

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--duration-500) var(--ease-out),
              transform var(--duration-500) var(--ease-out);
}

.reveal--left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity var(--duration-500) var(--ease-out),
              transform var(--duration-500) var(--ease-out);
}

.reveal--right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity var(--duration-500) var(--ease-out),
              transform var(--duration-500) var(--ease-out);
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity var(--duration-500) var(--ease-out),
              transform var(--duration-500) var(--ease-out);
}

.reveal.is-visible,
.reveal--left.is-visible,
.reveal--right.is-visible,
.reveal--scale.is-visible {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* Stagger children — 40ms per item */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 400ms var(--ease-out),
              transform 400ms var(--ease-out);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Reduced Motion ---- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal--left,
  .reveal--right,
  .reveal--scale,
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__tooth,
  .hero__circle,
  .hero__plus,
  .hero__diamond,
  .hero__dot,
  .hero__particle {
    animation: none !important;
  }

  .hero__word {
    opacity: 1;
    transform: none;
    animation: none !important;
  }
}