/* ============================================================
   ANIMATIONS
   Keyframes + transition utilities
   ============================================================ */

/* ── Keyframes ───────────────────────────────────────────── */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

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

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

/* Marquee infinite scroll */
@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes marqueeReverse {
  0%   { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

/* Floating bob (hero elements) */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(-2deg); }
  50%       { transform: translateY(-12px) rotate(2deg); }
}

/* Cursor blink (text selection annotation) */
@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Pulse ring */
@keyframes pulse {
  0%   { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.4); opacity: 0; }
}

/* Draw underline */
@keyframes drawUnderline {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* Spin slow */
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Page entrance overlay */
@keyframes pageReveal {
  from { transform: scaleY(1); transform-origin: top; }
  to   { transform: scaleY(0); transform-origin: top; }
}

/* ── Scroll Reveal States ────────────────────────────────── */
/* Elements start invisible; JS adds .is-visible when in viewport */

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--dur-slow) var(--ease-smooth),
    transform var(--dur-slow) var(--ease-smooth);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity var(--dur-slow) var(--ease-smooth),
    transform var(--dur-slow) var(--ease-smooth);
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity var(--dur-slow) var(--ease-smooth),
    transform var(--dur-slow) var(--ease-smooth);
}

.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition:
    opacity var(--dur-slow) var(--ease-smooth),
    transform var(--dur-slow) var(--ease-smooth);
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays applied by JS as inline style --stagger-delay */
.reveal,
.reveal-left,
.reveal-right,
.reveal-scale {
  transition-delay: var(--stagger-delay, 0ms);
}

/* ── Utility Transitions ─────────────────────────────────── */

.transition-all {
  transition: all var(--dur-medium) var(--ease-standard);
}

.transition-transform {
  transition: transform var(--dur-medium) var(--ease-smooth);
}

.transition-opacity {
  transition: opacity var(--dur-medium) var(--ease-standard);
}

.transition-fast {
  transition: all var(--dur-fast) var(--ease-standard);
}

/* ── Floating elements ───────────────────────────────────── */
.float-anim {
  animation: float 4s var(--ease-smooth) infinite;
}

.float-anim-slow {
  animation: floatSlow 6s var(--ease-smooth) infinite;
}

.float-anim-delayed {
  animation: float 4s var(--ease-smooth) infinite;
  animation-delay: -2s;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .float-anim,
  .float-anim-slow,
  .float-anim-delayed {
    animation: none;
  }

  @keyframes marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(0); }
  }
}