/* ==========================================================================
   Animations — Keyframes, Scroll Reveal, Kinetic Typography
   ========================================================================== */

/* --------------------------------------------------------------------------
   Keyframes
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  50.1% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

@keyframes underlineGrow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* --------------------------------------------------------------------------
   Scroll Reveal
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Staggered children — each successive child delays an additional 0.1s */
.reveal--stagger > *:nth-child(1) { transition-delay: 0s; }
.reveal--stagger > *:nth-child(2) { transition-delay: 0.1s; }
.reveal--stagger > *:nth-child(3) { transition-delay: 0.2s; }
.reveal--stagger > *:nth-child(4) { transition-delay: 0.3s; }
.reveal--stagger > *:nth-child(5) { transition-delay: 0.4s; }
.reveal--stagger > *:nth-child(6) { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   Kinetic Typography — Hero Word Animation
   -------------------------------------------------------------------------- */
.hero-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.hero-word.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   Typewriter Effect
   -------------------------------------------------------------------------- */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

[data-typewriter] {
  position: relative;
}

.typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--color-text);
  margin-left: 4px;
  vertical-align: baseline;
  animation: blink 0.8s step-end infinite;
}

.typewriter-cursor--hidden {
  opacity: 0;
  animation: none;
}

/* --------------------------------------------------------------------------
   Reduced Motion — Accessibility
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-word {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}