/* ==========================================================================
   ANIMATIONS.CSS — Shared keyframes, transitions, and motion preferences
   ========================================================================== */

/* --- Hover & focus defaults --- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* --- Scroll reveal (About page + future sections) --- */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 1s var(--ease-premium),
    transform 1s var(--ease-premium);
  will-change: transform, opacity;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

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

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(calc(-112px * 8));
  }
  50.01% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(0);
  }
}

@keyframes line-flow {
  to {
    stroke-dashoffset: -200;
  }
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(17, 17, 17, 0.4);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(17, 17, 17, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(17, 17, 17, 0);
  }
}

/* --- Animation utility classes --- */
.animate-fade-in {
  animation: fade-in var(--duration-normal) var(--ease-default);
}

.animate-slide-up {
  animation: slide-up var(--duration-normal) var(--ease-premium);
}

/* --- Reduced motion --- */
@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;
  }

  .scroll-reveal {
    opacity: 1;
    transform: none;
    will-change: auto;
  }

  .lift-hover:hover {
    transform: none;
  }
}