/* ==========================================================================
   Animations — Keyframes & Reveal States
   ========================================================================== */

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

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

@keyframes pulse-ring {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.02); }
}

@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.hero__content { animation: fadeInUp 0.8s ease-out both; }
.hero__visual { animation: fadeIn 1s ease-out 0.3s both; }

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.revealed { opacity: 1; transform: translateY(0); }
.reveal--delay { transition-delay: 0.15s; }

.skills__grid .skill-card.revealed:nth-child(1) { transition-delay: 0s; }
.skills__grid .skill-card.revealed:nth-child(2) { transition-delay: 0.05s; }
.skills__grid .skill-card.revealed:nth-child(3) { transition-delay: 0.1s; }
.skills__grid .skill-card.revealed:nth-child(4) { transition-delay: 0.15s; }
.skills__grid .skill-card.revealed:nth-child(5) { transition-delay: 0.2s; }
.skills__grid .skill-card.revealed:nth-child(6) { transition-delay: 0.25s; }

.timeline__item.revealed:nth-child(1) { transition-delay: 0s; }
.timeline__item.revealed:nth-child(2) { transition-delay: 0.1s; }
.timeline__item.revealed:nth-child(3) { transition-delay: 0.2s; }
.timeline__item.revealed:nth-child(4) { transition-delay: 0.3s; }

.achievements__grid .achievement-card.revealed:nth-child(1) { transition-delay: 0s; }
.achievements__grid .achievement-card.revealed:nth-child(2) { transition-delay: 0.05s; }
.achievements__grid .achievement-card.revealed:nth-child(3) { transition-delay: 0.1s; }
.achievements__grid .achievement-card.revealed:nth-child(4) { transition-delay: 0.15s; }
.achievements__grid .achievement-card.revealed:nth-child(5) { transition-delay: 0.2s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero__content, .hero__visual { animation: none; }
}