/* ============================================
   MOTION — Choreography, Not Animation
   ============================================
   The pause between animations matters more
   than the animation itself.
   ============================================ */

:root {
  /* ============================================
     TIMING FUNCTIONS — The feel of movement
     ============================================ */
  --ease-out-expo:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart:   cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-back:    cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out-sine: cubic-bezier(0.37, 0, 0.63, 1);
  --ease-spring:      cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-snap:        cubic-bezier(0.7, 0, 0.3, 1);
  --ease-drift:       cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* ============================================
     DURATIONS — Tempo of the interface
     ============================================ */
  --dur-instant:   100ms;
  --dur-snap:      200ms;
  --dur-swift:     350ms;
  --dur-flow:      600ms;
  --dur-drift:     1000ms;
  --dur-breathe:   2000ms;
  --dur-meditate:  4000ms;

  /* Stagger delay between sequential items */
  --stagger-tight:  30ms;
  --stagger-normal: 60ms;
  --stagger-loose:  120ms;
  --stagger-drama:  200ms;
}

/* ============================================
   KEYFRAMES — The vocabulary of movement
   ============================================ */

/* --- REVEAL: Content emerging into existence --- */
@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes reveal-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes reveal-clip-up {
  from {
    clip-path: inset(100% 0 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

@keyframes reveal-clip-left {
  from {
    clip-path: inset(0 100% 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

/* --- DRIFT: Subtle continuous movement --- */
@keyframes drift-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

@keyframes drift-sway {
  0%, 100% { transform: rotate(-1deg); }
  50% { transform: rotate(1deg); }
}

/* --- PULSE: Living, breathing motion --- */
@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

@keyframes pulse-scale {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* --- KINETIC TYPE: Letters in motion --- */
@keyframes type-slide-in {
  from {
    transform: translateX(-110%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes type-stamp {
  0% {
    transform: scale(3);
    opacity: 0;
  }
  60% {
    transform: scale(0.95);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes type-scramble-in {
  0% {
    filter: blur(12px);
    opacity: 0;
  }
  50% {
    filter: blur(4px);
    opacity: 0.5;
  }
  100% {
    filter: blur(0);
    opacity: 1;
  }
}

/* --- MARQUEE: Continuous horizontal scroll --- */
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* --- TEXTURE: Grain animation --- */
@keyframes grain-shift {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -10%); }
  20% { transform: translate(-15%, 5%); }
  30% { transform: translate(7%, -25%); }
  40% { transform: translate(-5%, 25%); }
  50% { transform: translate(-15%, 10%); }
  60% { transform: translate(15%, 0%); }
  70% { transform: translate(0%, 15%); }
  80% { transform: translate(3%, 35%); }
  90% { transform: translate(-10%, 10%); }
}

/* --- LINE DRAW --- */
@keyframes line-draw {
  from { stroke-dashoffset: var(--line-length, 1000); }
  to { stroke-dashoffset: 0; }
}

/* ============================================
   MOTION CLASSES — Apply to elements
   ============================================ */

/* Reveal on scroll (pair with IntersectionObserver) */
.motion-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity var(--dur-flow) var(--ease-out-expo),
    transform var(--dur-flow) var(--ease-out-expo);
}

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

/* Stagger children */
.motion-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-flow) var(--ease-out-expo),
    transform var(--dur-flow) var(--ease-out-expo);
}

.motion-stagger.--visible > *:nth-child(1)  { transition-delay: calc(var(--stagger-normal) * 0); }
.motion-stagger.--visible > *:nth-child(2)  { transition-delay: calc(var(--stagger-normal) * 1); }
.motion-stagger.--visible > *:nth-child(3)  { transition-delay: calc(var(--stagger-normal) * 2); }
.motion-stagger.--visible > *:nth-child(4)  { transition-delay: calc(var(--stagger-normal) * 3); }
.motion-stagger.--visible > *:nth-child(5)  { transition-delay: calc(var(--stagger-normal) * 4); }
.motion-stagger.--visible > *:nth-child(6)  { transition-delay: calc(var(--stagger-normal) * 5); }
.motion-stagger.--visible > *:nth-child(7)  { transition-delay: calc(var(--stagger-normal) * 6); }
.motion-stagger.--visible > *:nth-child(8)  { transition-delay: calc(var(--stagger-normal) * 7); }
.motion-stagger.--visible > *:nth-child(9)  { transition-delay: calc(var(--stagger-normal) * 8); }
.motion-stagger.--visible > *:nth-child(10) { transition-delay: calc(var(--stagger-normal) * 9); }

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

/* Clip reveal */
.motion-clip-up {
  clip-path: inset(100% 0 0 0);
  transition: clip-path var(--dur-drift) var(--ease-out-expo);
}
.motion-clip-up.--visible {
  clip-path: inset(0 0 0 0);
}

/* Continuous marquee */
.motion-marquee {
  display: flex;
  overflow: hidden;
  white-space: nowrap;
}

.motion-marquee > * {
  display: flex;
  animation: marquee-scroll 20s linear infinite;
  flex-shrink: 0;
}

/* Hover lift */
.motion-hover-lift {
  transition: transform var(--dur-swift) var(--ease-out-expo);
}
.motion-hover-lift:hover {
  transform: translateY(-4px);
}

/* Hover scale */
.motion-hover-scale {
  transition: transform var(--dur-swift) var(--ease-spring);
}
.motion-hover-scale:hover {
  transform: scale(1.03);
}

/* Magnetic cursor attraction (apply via JS) */
.motion-magnetic {
  transition: transform var(--dur-swift) var(--ease-out-quart);
}

/* Smooth image zoom on hover */
.motion-image-zoom {
  overflow: hidden;
}
.motion-image-zoom img {
  transition: transform var(--dur-drift) var(--ease-out-expo);
}
.motion-image-zoom:hover img {
  transform: scale(1.08);
}

/* ============================================
   SCROLL-DRIVEN ANIMATIONS (CSS-only)
   ============================================ */

@supports (animation-timeline: scroll()) {
  .motion-scroll-fade {
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  .motion-scroll-parallax {
    animation: drift-float linear both;
    animation-timeline: scroll();
  }
}

/* ============================================
   PREFERS-REDUCED-MOTION — Respect the user
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .motion-reveal,
  .motion-stagger > * {
    opacity: 1;
    transform: none;
  }

  .motion-clip-up {
    clip-path: none;
  }

  .motion-marquee > * {
    animation: none;
  }
}