/* ═══════════════════════════════════════════════════════════════════════════
   ANIMATIONS - Motion & Transitions
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Keyframes ───────────────────────────────────────────────────────────── */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

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

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

/* ─── Animation Classes ───────────────────────────────────────────────────── */
.animate-fade-in {
  animation: fadeIn var(--transition-base) ease forwards;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) ease forwards;
}

.animate-fade-in-scale {
  animation: fadeInScale var(--transition-base) ease forwards;
}

.animate-slide-in-left {
  animation: slideInLeft var(--transition-base) ease forwards;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 0%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-tertiary) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* ─── Staggered Animations ────────────────────────────────────────────────── */
[data-animate] {
  opacity: 0;
}

[data-animate].animated {
  animation: fadeInUp 0.6s ease forwards;
}

[data-animate-delay="1"] { animation-delay: 0.1s; }
[data-animate-delay="2"] { animation-delay: 0.2s; }
[data-animate-delay="3"] { animation-delay: 0.3s; }
[data-animate-delay="4"] { animation-delay: 0.4s; }
[data-animate-delay="5"] { animation-delay: 0.5s; }
[data-animate-delay="6"] { animation-delay: 0.6s; }
[data-animate-delay="7"] { animation-delay: 0.7s; }
[data-animate-delay="8"] { animation-delay: 0.8s; }

/* ─── Hover Transitions ───────────────────────────────────────────────────── */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.hover-scale:hover {
  transform: scale(1.02);
}

.hover-glow {
  transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

/* ─── Page Load Animation ─────────────────────────────────────────────────── */
.page-enter {
  opacity: 0;
}

.page-enter-active {
  opacity: 1;
  transition: opacity 400ms ease;
}

/* ─── Scroll Reveal ───────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ─── Loading States ──────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton--text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton--text:last-child {
  width: 70%;
}

.skeleton--circle {
  border-radius: var(--radius-full);
}

/* ─── Reduced Motion ──────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}