/**
 * ADCAM DIGITAL — ANIMATION SYSTEM
 * css/animations.css
 *
 * Phase 2 — Refined, restrained motion language.
 * Motion communicates quality, not novelty.
 * All animations respect prefers-reduced-motion.
 */

/* ============================================================
 * KEYFRAMES
 * ============================================================ */

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

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-28px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(28px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* Subtle shimmer — loading placeholders */
@keyframes shimmer {
  from { background-position: -200% center; }
  to   { background-position:  200% center; }
}

/* Pulse — subtle alive pulse for status indicators */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.55; }
}

/* Connector flow — for ecosystem diagram animation */
@keyframes flowRight {
  from { stroke-dashoffset: 100; }
  to   { stroke-dashoffset: 0; }
}

/* Dot pulse — status alive indicator */
@keyframes dotPulse {
  0%, 100% { transform: scale(1);    opacity: 1; }
  50%       { transform: scale(1.5); opacity: 0.6; }
}

/* Number counter — fill effect */
@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
 * SCROLL REVEAL SYSTEM
 * Elements start hidden, JS adds .is-visible to animate them in.
 * css/animations.js uses IntersectionObserver.
 * ============================================================ */

.reveal {
  opacity: 0;
  will-change: opacity, transform;
  transition:
    opacity   var(--duration-slow) var(--ease-decelerate),
    transform var(--duration-slow) var(--ease-decelerate);
}

.reveal.is-visible {
  opacity: 1 !important;
  transform: none !important;
}

/* Transform variants */
.reveal--fade-up    { transform: translateY(36px); }
.reveal--fade-down  { transform: translateY(-20px); }
.reveal--fade-left  { transform: translateX(-36px); }
.reveal--fade-right { transform: translateX(36px); }
.reveal--scale      { transform: scale(0.93); }
.reveal--scale-up   { transform: scale(0.97) translateY(20px); }

/* ============================================================
 * STAGGER CHILDREN
 * Parent gets .reveal-stagger, JS adds .is-visible to trigger.
 * ============================================================ */

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity   var(--duration-slow) var(--ease-decelerate),
    transform var(--duration-slow) var(--ease-decelerate);
}

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: none;
}

/* Stagger delays — up to 8 children */
.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 > *:nth-child(7)  { transition-delay: 480ms; }
.reveal-stagger.is-visible > *:nth-child(8)  { transition-delay: 560ms; }

/* ============================================================
 * ONE-SHOT ANIMATION CLASSES
 * ============================================================ */

.animate-fade-in    { animation: fadeIn    var(--duration-normal) var(--ease-decelerate) both; }
.animate-fade-up    { animation: fadeInUp  var(--duration-slow)   var(--ease-decelerate) both; }
.animate-scale-in   { animation: scaleIn   var(--duration-normal) var(--ease-spring)     both; }

/* Delay utilities */
.delay-100  { animation-delay: 100ms; transition-delay: 100ms; }
.delay-200  { animation-delay: 200ms; transition-delay: 200ms; }
.delay-300  { animation-delay: 300ms; transition-delay: 300ms; }
.delay-400  { animation-delay: 400ms; transition-delay: 400ms; }
.delay-500  { animation-delay: 500ms; transition-delay: 500ms; }
.delay-600  { animation-delay: 600ms; transition-delay: 600ms; }
.delay-700  { animation-delay: 700ms; transition-delay: 700ms; }
.delay-800  { animation-delay: 800ms; transition-delay: 800ms; }

/* ============================================================
 * HOVER MICRO-INTERACTIONS
 * ============================================================ */

.hover-lift {
  transition: transform var(--transition-normal) var(--ease-decelerate),
              box-shadow var(--transition-normal);
}
.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.hover-lift-sm {
  transition: transform var(--transition-fast) var(--ease-decelerate),
              box-shadow var(--transition-fast);
}
.hover-lift-sm:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hover-scale {
  transition: transform var(--transition-fast) var(--ease-spring);
}
.hover-scale:hover { transform: scale(1.02); }

/* ============================================================
 * LINE DRAW — for ecosystem connectors (SVG)
 * ============================================================ */

.connector-line {
  stroke-dasharray: 6 4;
  stroke-dashoffset: 0;
  animation: flowRight 2s linear infinite;
}

/* ============================================================
 * STATUS DOT — alive indicators
 * ============================================================ */

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  display: inline-block;
}

.status-dot--pulse {
  animation: dotPulse 2s ease-in-out infinite;
}

/* ============================================================
 * SKELETON LOADING
 * ============================================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-elevated) 0%,
    var(--color-bg-card)     50%,
    var(--color-bg-elevated) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ============================================================
 * REDUCED MOTION — Full override
 * ============================================================ */

@media (prefers-reduced-motion: reduce) {

  .reveal,
  .reveal-stagger > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .animate-fade-in,
  .animate-fade-up,
  .animate-scale-in {
    animation: none !important;
  }

  .hover-lift:hover,
  .hover-lift-sm:hover,
  .hover-scale:hover {
    transform: none !important;
  }

  .connector-line {
    animation: none !important;
  }

  .status-dot--pulse {
    animation: none !important;
  }

  .skeleton {
    animation: none !important;
    background: var(--color-bg-elevated);
  }

}