/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

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

/* Hero entrance */
.hero-entrance {
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeIn 0.8s ease forwards;
}

.hero-entrance.delay-1 { animation-delay: 0.15s; }
.hero-entrance.delay-2 { animation-delay: 0.3s; }
.hero-entrance.delay-3 { animation-delay: 0.45s; }

@keyframes heroFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  background-size: cover;
  background-position: center;
  animation: heroBgPulse 22s ease-in-out infinite alternate;
}

@keyframes heroBgPulse {
  from { background-size: 100%; }
  to { background-size: 108%; }
}

.hero::after {
  display: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

/* Modal animation */
.modal-overlay {
  opacity: 0;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
}

.modal-overlay .modal {
  transform: translateY(20px) scale(0.98);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: white;
  color: var(--dark);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.back-to-top:hover {
  background: var(--primary);
  color: white;
}

/* Burger open state */
.burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span:nth-child(2) {
  opacity: 0;
}

.burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-entrance {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .hero::after {
    display: none;
  }

  .hero {
    animation: none;
  }

  .modal-overlay,
  .modal-overlay .modal {
    transition: none;
    transform: none;
    opacity: 1;
  }

  .back-to-top {
    transition: none;
  }
}