/* === ANIMATIONS — Scroll reveal, hover, parallax === */

/* --- Scroll reveal (fade in up) --- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

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

/* Staggered children */
.reveal-group .reveal:nth-child(2) { transition-delay: 100ms; }
.reveal-group .reveal:nth-child(3) { transition-delay: 200ms; }
.reveal-group .reveal:nth-child(4) { transition-delay: 300ms; }
.reveal-group .reveal:nth-child(5) { transition-delay: 400ms; }

/* --- Reveal fade only (no translate) --- */

.reveal-fade {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.reveal-fade.visible {
  opacity: 1;
}

/* --- Reveal from left --- */

.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- Reveal from right --- */

.reveal-right {
  opacity: 0;
  transform: translateX(32px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- Reveal scale --- */

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

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

/* --- Hero chevron bounce --- */

@keyframes bounce-subtle {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(8px); }
}

/* Bounce is now chained in .hero__indicator above.
   Generic scroll-indicator bounce kept for non-hero use. */
.scroll-indicator:not(.hero__indicator) {
  animation: bounce-subtle 2s var(--ease-in-out) infinite;
}

/* --- SVG sketch animation (Acte 2) --- */

.sketch-path {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 2s var(--ease-out);
}

.sketch-path.visible {
  stroke-dashoffset: 0;
}

/* --- Hero title entrance --- */

@keyframes hero-enter {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__title {
  animation: hero-enter 1.2s var(--ease-out) 0.3s both;
}

.hero__subtitle {
  animation: hero-enter 1.2s var(--ease-out) 0.6s both;
}

.hero__indicator {
  animation:
    hero-enter 1.2s var(--ease-out) 1s both,
    bounce-subtle 2s var(--ease-in-out) 2.5s infinite;
}

/* --- Parallax (background attachment) --- */

.parallax-bg {
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
}

@supports not (background-attachment: fixed) {
  .parallax-bg {
    background-attachment: scroll;
  }
}

/* Mobile: disable parallax (performance) */
@media (max-width: 768px) {
  .parallax-bg {
    background-attachment: scroll;
  }
}

/* --- Underline grow (hover on links/titles) --- */

.underline-grow {
  position: relative;
  display: inline-block;
}

.underline-grow::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--duration-base) var(--ease-out);
}

.underline-grow:hover::after {
  width: 100%;
}

/* --- Reduced motion override --- */

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-fade,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }

  .sketch-path {
    stroke-dashoffset: 0;
  }

  .hero__title,
  .hero__subtitle,
  .hero__indicator {
    animation: none;
    opacity: 1;
  }
}