/* ============================================================
   ANIMATIONS.CSS — Reveal, parallax, hover, transitions
   Beskydské svatby · Chata Dukla · Čeladná
   ============================================================ */

/* ============================================================
   REVEAL — IntersectionObserver fade-in
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Stagger pro karty ve gridu */
.reveal[data-delay="100"] { transition-delay: 0.1s; }
.reveal[data-delay="200"] { transition-delay: 0.2s; }
.reveal[data-delay="300"] { transition-delay: 0.3s; }
.reveal[data-delay="400"] { transition-delay: 0.4s; }
.reveal[data-delay="500"] { transition-delay: 0.5s; }
.reveal[data-delay="600"] { transition-delay: 0.6s; }

/* Fade pouze opacity (bez posunu) */
.reveal-fade {
  opacity: 0;
  transition: opacity 0.9s ease;
}

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

/* Slide zleva */
.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Slide zprava */
.reveal-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================================
   HERO ENTRANCE animace
   ============================================================ */

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__eyebrow {
  animation: heroFadeUp 0.8s ease 0.2s both;
}

.hero__title {
  animation: heroFadeUp 0.8s ease 0.4s both;
}

.hero__subtitle {
  animation: heroFadeUp 0.8s ease 0.6s both;
}

.hero__buttons {
  animation: heroFadeUp 0.8s ease 0.8s both;
}

.hero__scroll {
  animation: heroFadeUp 0.8s ease 1.0s both;
}

/* ============================================================
   SCROLL BOUNCE — indikátor scrollu
   ============================================================ */

@keyframes scrollBounce {
  0%, 100% {
    transform: translateY(0);
    opacity: 0.7;
  }
  50% {
    transform: translateY(6px);
    opacity: 1;
  }
}

/* ============================================================
   HOVER EFEKTY
   ============================================================ */

/* Karty */
.hover-lift {
  transition: transform var(--transition), box-shadow var(--transition);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(44, 36, 22, 0.1);
}

/* Obrázky — zoom */
.hover-zoom img {
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hover-zoom:hover img {
  transform: scale(1.04);
}

/* ============================================================
   CAROUSEL fade in/out
   ============================================================ */

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

.carousel__slide.entering {
  animation: fadeSlide 0.5s ease both;
}

/* ============================================================
   GALERIE — filter přechod
   ============================================================ */

.gallery-item {
  transition:
    opacity 0.4s ease,
    transform 0.4s ease,
    visibility 0.4s ease;
}

.gallery-item.hiding {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
}

.gallery-item.showing {
  opacity: 1;
  transform: scale(1);
}

/* ============================================================
   BACK-TO-TOP tlačítko
   ============================================================ */

.back-to-top-fixed {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(122, 99, 64, 0.35);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.back-to-top-fixed.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-fixed:hover {
  background: var(--color-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(44, 36, 22, 0.3);
}

.back-to-top-fixed svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

/* ============================================================
   NAV OVERLAY — slide-in
   ============================================================ */

@keyframes overlayLinkIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-overlay.open .nav-overlay__link {
  animation: overlayLinkIn 0.4s ease both;
}

.nav-overlay.open .nav-overlay__link:nth-child(1) { animation-delay: 0.1s; }
.nav-overlay.open .nav-overlay__link:nth-child(2) { animation-delay: 0.15s; }
.nav-overlay.open .nav-overlay__link:nth-child(3) { animation-delay: 0.2s; }
.nav-overlay.open .nav-overlay__link:nth-child(4) { animation-delay: 0.25s; }
.nav-overlay.open .nav-overlay__link:nth-child(5) { animation-delay: 0.3s; }
.nav-overlay.open .nav-overlay__link:nth-child(6) { animation-delay: 0.35s; }

/* ============================================================
   DECO LINKA — animace šíření
   ============================================================ */

.deco-line-animate {
  width: 3rem;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.8s ease 0.3s;
}

.reveal.visible ~ .deco-line-animate,
.deco-line-animate.visible {
  transform: scaleX(1);
}

/* ============================================================
   PŘECHODY SEKCÍ
   ============================================================ */

@keyframes sectionPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ============================================================
   REDUCE MOTION — přístupnost
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .hero__bg img,
  .parallax-section__bg img {
    will-change: auto;
  }
}