/* ============================================================
   Digital Waves — Animation System
   Phase 1.2 — Keyframes, scroll-reveal states, page loader
   Requires design-system.css tokens.
   ============================================================ */

/* ── KEYFRAMES ── */

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

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

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

@keyframes slideLeft {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideRight {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

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

@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@keyframes marqueeScrollReverse {
  from { transform: translateX(-50%); }
  to   { transform: translateX(0); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-accent-glow); }
  50%      { box-shadow: 0 0 0 18px rgba(26,188,156,0); }
}

@keyframes waveFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

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

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(8px); }
}

/* ── SCROLL REVEAL — HIDDEN BASE STATES ──
   JS IntersectionObserver adds .revealed on viewport entry. */

[data-reveal] {
  opacity: 0;
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
  will-change: opacity, transform;
}

[data-reveal="up"]    { transform: translateY(32px); }
[data-reveal="down"]  { transform: translateY(-32px); }
[data-reveal="left"]  { transform: translateX(40px); }
[data-reveal="right"] { transform: translateX(-40px); }
[data-reveal="scale"] { transform: scale(0.92); }
[data-reveal="fade"]  { transform: none; }

[dir="rtl"] [data-reveal="left"]  { transform: translateX(-40px); }
[dir="rtl"] [data-reveal="right"] { transform: translateX(40px); }

[data-reveal].revealed {
  opacity: 1;
  transform: none;
}

/* ── STAGGER DELAYS (×100ms) ── */
[data-reveal-delay="1"].revealed { transition-delay: 100ms; }
[data-reveal-delay="2"].revealed { transition-delay: 200ms; }
[data-reveal-delay="3"].revealed { transition-delay: 300ms; }
[data-reveal-delay="4"].revealed { transition-delay: 400ms; }
[data-reveal-delay="5"].revealed { transition-delay: 500ms; }
[data-reveal-delay="6"].revealed { transition-delay: 600ms; }

/* ── DURATION VARIANTS ── */
[data-reveal-duration="fast"] { transition-duration: var(--duration-base); }
[data-reveal-duration="slow"] { transition-duration: var(--duration-slower); }

/* ── PAGE LOADER ── */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-dark);
  transition: opacity var(--duration-slow) var(--ease-out), visibility var(--duration-slow);
}

.page-loader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-brand {
  width: 64px;
  height: 64px;
}

.loader-img {
  max-width: 220px;
  max-height: 220px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.loader-pulse {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  animation: pulseGlow 1.6s var(--ease-in-out) infinite, waveFloat 2.4s var(--ease-in-out) infinite;
}

/* ── 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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}