/* ================================================
   ANIMATION SYSTEM — Fude Academy
   Additive layer. Toggle via inline <script> in <head>.
   ================================================ */

/* ── Initial hidden states ─────────────────────── */
[data-animations="on"] [data-animate="fade-up"],
[data-animations="on"] [data-animate="scale-in"],
[data-animations="on"] [data-animate="hero-title"],
[data-animations="on"] [data-animate="hero-scale"] {
  opacity: 0;
}

[data-animations="on"] [data-animate="fade-up-stagger"] > *,
[data-animations="on"] [data-animate="hero-stagger"] > * {
  opacity: 0;
}

[data-animations="on"] [data-animate="star-sequence"] .cc-star {
  opacity: 0;
}

/* ── Nav: sticky + scroll state ────────────────── */
[data-animations="on"] .nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

[data-animations="on"] .nav--scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.95);
}

@supports (backdrop-filter: blur(10px)) {
  [data-animations="on"] .nav--scrolled {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.85);
  }
}

/* ── Nav link underline ────────────────────────── */
[data-animations="on"] .nav-link {
  position: relative;
}

[data-animations="on"] .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 80%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: translateX(-50%) scaleX(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animations="on"] .nav-link:hover::after,
[data-animations="on"] .nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── Button hover ──────────────────────────────── */
[data-animations="on"] .btn-primary-gradient {
  background-size: 200% 100%;
  background-image: linear-gradient(
    to right,
    var(--color-gradient-start),
    var(--color-gradient-end),
    var(--color-gradient-start)
  );
  transition: background-position 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.3s;
}

[data-animations="on"] .btn-primary-gradient:hover {
  background-position: 100% 0;
  transform: scale(1.02);
  box-shadow: 0 4px 20px rgba(9, 12, 179, 0.3);
  opacity: 1;
}

[data-animations="on"] .btn-outline-white {
  transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animations="on"] .btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.02);
  opacity: 1;
}

/* ── Course card image zoom ────────────────────── */
[data-animations="on"] .course-card-img {
  overflow: hidden;
}

[data-animations="on"] .course-card-img img {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animations="on"] .course-card:hover .course-card-img img {
  transform: scale(1.05);
}

/* ── Teacher photo hover ───────────────────────── */
[data-animations="on"] .teacher-photo {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.4s;
}

[data-animations="on"] .teacher-card:hover .teacher-photo {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* ── Card hover uplift ─────────────────────────── */
[data-animations="on"] .path-card,
[data-animations="on"] .advantage-card,
[data-animations="on"] .testimonial-card,
[data-animations="on"] .cc-outline-card {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.4s;
}

[data-animations="on"] .path-card:hover,
[data-animations="on"] .advantage-card:hover,
[data-animations="on"] .testimonial-card:hover,
[data-animations="on"] .cc-outline-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* ── Camp item image zoom ──────────────────────── */
[data-animations="on"] .cc-camp-item-img {
  overflow: hidden;
}

[data-animations="on"] .cc-camp-item-img img {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animations="on"] .cc-camp-item:hover .cc-camp-item-img img {
  transform: scale(1.05);
}

/* ── Footer link underline ─────────────────────── */
[data-animations="on"] .footer-nav-links a,
[data-animations="on"] .footer-bottom a {
  position: relative;
  display: inline-block;
}

[data-animations="on"] .footer-nav-links a::after,
[data-animations="on"] .footer-bottom a::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animations="on"] .footer-nav-links a:hover::after,
[data-animations="on"] .footer-bottom a:hover::after {
  transform: scaleX(1);
}

/* ── Reduced motion ────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  [data-animate],
  [data-animate] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    animation: none !important;
  }
}

/* ── Toggle off ────────────────────────────────── */
[data-animations="off"] [data-animate],
[data-animations="off"] [data-animate] > * {
  opacity: 1 !important;
  transform: none !important;
}
