/* ═══════════════════════════════════════════════════════════
   ANIMATIONS — Keyframes and Transition Utilities
   ═══════════════════════════════════════════════════════════ */

/* ── Entrance ── */
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in-down {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* ── Loading ── */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 0.2; }
}

/* ── Staggered Card Entrance ── */
.card-item {
  animation: fade-in-up var(--duration-normal) var(--ease-out) both;
}

.card-item:nth-child(1)  { animation-delay: 0ms; }
.card-item:nth-child(2)  { animation-delay: 30ms; }
.card-item:nth-child(3)  { animation-delay: 60ms; }
.card-item:nth-child(4)  { animation-delay: 90ms; }
.card-item:nth-child(5)  { animation-delay: 120ms; }
.card-item:nth-child(6)  { animation-delay: 150ms; }
.card-item:nth-child(7)  { animation-delay: 180ms; }
.card-item:nth-child(8)  { animation-delay: 210ms; }
.card-item:nth-child(9)  { animation-delay: 240ms; }
.card-item:nth-child(10) { animation-delay: 270ms; }
.card-item:nth-child(11) { animation-delay: 300ms; }
.card-item:nth-child(12) { animation-delay: 330ms; }

.signal-card {
  animation: fade-in-up var(--duration-normal) var(--ease-out) both;
}

.signal-card:nth-child(1)  { animation-delay: 0ms; }
.signal-card:nth-child(2)  { animation-delay: 50ms; }
.signal-card:nth-child(3)  { animation-delay: 100ms; }
.signal-card:nth-child(4)  { animation-delay: 150ms; }
.signal-card:nth-child(5)  { animation-delay: 200ms; }
.signal-card:nth-child(6)  { animation-delay: 250ms; }

/* ── Loading Skeletons ── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton--text { height: 14px; width: 80%; margin-bottom: var(--space-2); }
.skeleton--title { height: 20px; width: 60%; margin-bottom: var(--space-3); }
.skeleton--card { height: 120px; width: 100%; border-radius: var(--radius-md); }

/* ── Section Reveal ── */
.section-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

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

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  .card-item,
  .signal-card,
  .section-reveal {
    animation: none;
    opacity: 1;
    transform: none;
  }
}