/* ============================================
   ASFA VISION — Animations & Transitions
   ============================================ */

/* --- Fade In on Scroll (via IntersectionObserver) --- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay variants */
.fade-in.delay-1  { transition-delay: 0.1s; }
.fade-in.delay-2  { transition-delay: 0.2s; }
.fade-in.delay-3  { transition-delay: 0.3s; }
.fade-in.delay-4  { transition-delay: 0.4s; }
.fade-in.delay-5  { transition-delay: 0.5s; }
.fade-in.delay-6  { transition-delay: 0.6s; }
.fade-in.delay-7  { transition-delay: 0.7s; }
.fade-in.delay-8  { transition-delay: 0.8s; }
.fade-in.delay-9  { transition-delay: 0.9s; }
.fade-in.delay-10 { transition-delay: 1.0s; }

/* Fade from left */
.fade-left {
  opacity: 0;
  transform: translateX(-36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-left.visible { opacity: 1; transform: translateX(0); }

/* Fade from right */
.fade-right {
  opacity: 0;
  transform: translateX(36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-right.visible { opacity: 1; transform: translateX(0); }

/* --- Hero Entrance Animation --- */
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-label    { animation: heroFadeUp 0.7s ease 0.2s both; }
.hero h1       { animation: heroFadeUp 0.7s ease 0.4s both; }
.hero-subtitle { animation: heroFadeUp 0.7s ease 0.6s both; }
.hero-buttons  { animation: heroFadeUp 0.7s ease 0.8s both; }
.hero-scroll   { animation: heroFadeUp 0.7s ease 1s both; }

/* --- Hamburger Open State --- */
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Pulse (used on WhatsApp button icon) --- */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.12); }
}
.btn-whatsapp svg { animation: pulse 2s ease infinite; }

/* --- Shimmer loading placeholder (optional) --- */
@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 600px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

/* --- Number Counter (class toggled by JS) --- */
.counter-done { transition: none; }

/* --- Page Loading Overlay --- */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

#page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-ring {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255,255,255,0.15);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}