/* ============================================
   MyErossence 2027 - Scroll-Driven Animations
   Pure CSS with IntersectionObserver fallback
   ============================================ */

/* ---- Scroll Progress Bar ---- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 10000;
  background: transparent;
}

.scroll-progress::after {
  content: '';
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent, #367588), var(--primary));
  transform-origin: left;
  transform: scaleX(0);
}

/* ---- Keyframes ---- */
@keyframes scroll-fade-in {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scroll-fade-in-scale {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes scroll-slide-left {
  from { opacity: 0; transform: translateX(-60px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scroll-slide-right {
  from { opacity: 0; transform: translateX(60px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scroll-clip-reveal {
  from { clip-path: inset(100% 0 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

@keyframes scroll-rotate-in {
  from { opacity: 0; transform: rotate(-3deg) translateY(30px); }
  to   { opacity: 1; transform: rotate(0) translateY(0); }
}

@keyframes scroll-blur-in {
  from { opacity: 0; filter: blur(10px); }
  to   { opacity: 1; filter: blur(0); }
}

@keyframes scroll-parallax {
  from { transform: translateY(-15%); }
  to   { transform: translateY(15%); }
}

@keyframes scroll-progress-fill {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* ---- Scroll-Driven Animations (Chrome/Edge 115+) ---- */
@supports (animation-timeline: view()) {
  .scroll-progress::after {
    animation: scroll-progress-fill linear;
    animation-timeline: scroll(root);
  }

  .scroll-reveal {
    animation: scroll-fade-in ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }

  .scroll-reveal-scale {
    animation: scroll-fade-in-scale ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  .scroll-slide-left {
    animation: scroll-slide-left ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }

  .scroll-slide-right {
    animation: scroll-slide-right ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }

  .scroll-image-reveal {
    animation: scroll-clip-reveal ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 50%;
  }

  .scroll-rotate-in {
    animation: scroll-rotate-in ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  .scroll-blur-in {
    animation: scroll-blur-in ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }

  .scroll-parallax-slow {
    animation: scroll-parallax linear both;
    animation-timeline: view();
  }

  /* Stagger children */
  .scroll-stagger > * {
    animation: scroll-fade-in ease-out both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
  .scroll-stagger > *:nth-child(2) { animation-delay: 80ms; }
  .scroll-stagger > *:nth-child(3) { animation-delay: 160ms; }
  .scroll-stagger > *:nth-child(4) { animation-delay: 240ms; }
  .scroll-stagger > *:nth-child(5) { animation-delay: 320ms; }
  .scroll-stagger > *:nth-child(6) { animation-delay: 400ms; }
}

/* ---- Fallback for Firefox/Safari (IntersectionObserver) ---- */
@supports not (animation-timeline: view()) {
  .scroll-reveal,
  .scroll-reveal-scale,
  .scroll-slide-left,
  .scroll-slide-right,
  .scroll-image-reveal,
  .scroll-rotate-in,
  .scroll-blur-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out, filter 0.7s ease-out, clip-path 0.7s ease-out;
  }

  .scroll-slide-left { transform: translateX(-40px); }
  .scroll-slide-right { transform: translateX(40px); }
  .scroll-blur-in { filter: blur(8px); transform: none; }
  .scroll-image-reveal { clip-path: inset(100% 0 0 0); transform: none; opacity: 1; }

  .scroll-reveal.is-visible,
  .scroll-reveal-scale.is-visible,
  .scroll-slide-left.is-visible,
  .scroll-slide-right.is-visible,
  .scroll-rotate-in.is-visible,
  .scroll-blur-in.is-visible {
    opacity: 1;
    transform: none;
    filter: none;
  }

  .scroll-image-reveal.is-visible {
    clip-path: inset(0 0 0 0);
  }

  .scroll-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  }
  .scroll-stagger.is-visible > * { opacity: 1; transform: none; }
  .scroll-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
  .scroll-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
  .scroll-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
  .scroll-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
  .scroll-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  .scroll-reveal,
  .scroll-reveal-scale,
  .scroll-slide-left,
  .scroll-slide-right,
  .scroll-image-reveal,
  .scroll-rotate-in,
  .scroll-blur-in,
  .scroll-stagger > * {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    clip-path: none !important;
    transition: none !important;
  }
}