/* ================================================================
   ANIMATIONS & SCROLL EFFECTS
   ================================================================ */

/* ─── Scroll reveal ─────────────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.stagger.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger.visible > *:nth-child(2) { transition-delay: 0.10s; }
.stagger.visible > *:nth-child(3) { transition-delay: 0.15s; }
.stagger.visible > *:nth-child(4) { transition-delay: 0.20s; }
.stagger.visible > *:nth-child(5) { transition-delay: 0.25s; }
.stagger.visible > *:nth-child(6) { transition-delay: 0.30s; }
.stagger.visible > *:nth-child(7) { transition-delay: 0.35s; }
.stagger.visible > *:nth-child(8) { transition-delay: 0.40s; }
.stagger.visible > *:nth-child(9) { transition-delay: 0.45s; }
.stagger.visible > *:nth-child(10) { transition-delay: 0.50s; }
.stagger.visible > *:nth-child(11) { transition-delay: 0.55s; }
.stagger.visible > *:nth-child(12) { transition-delay: 0.60s; }
.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Hover effects ─────────────────────────────────────────── */
.feature-card:hover .feature-icon {
  transform: scale(1.1);
  transition: transform 0.3s ease;
}
.feature-icon {
  transition: transform 0.3s ease;
}

.integration-card:hover .int-icon {
  transform: scale(1.08) rotate(3deg);
  transition: transform 0.3s ease;
}
.int-icon {
  transition: transform 0.3s ease;
}

.tech-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.lang-item:hover .lang-flag {
  transform: scale(1.2);
  transition: transform 0.2s ease;
}
.lang-flag { transition: transform 0.2s ease; }

/* ─── Flag toggle pulse ─────────────────────────────────────── */
.flag-toggle.on {
  animation: flagPulse 3s ease-in-out infinite;
}
@keyframes flagPulse {
  0%, 100% { box-shadow: 0 0 0 rgba(34, 197, 94, 0); }
  50% { box-shadow: 0 0 8px rgba(34, 197, 94, 0.15); }
}

/* ─── Arrow flow animation ──────────────────────────────────── */
.arrow-line::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 12px;
  height: 4px;
  background: var(--primary-hover);
  border-radius: 2px;
  animation: arrowFlow 2s ease-in-out infinite;
}
@keyframes arrowFlow {
  0% { left: 0; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { left: calc(100% - 12px); opacity: 0; }
}

/* ─── Floating particles ────────────────────────────────────── */
.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0;
  animation: float linear infinite;
}
@keyframes float {
  0% { opacity: 0; transform: translateY(0) scale(0); }
  10% { opacity: 0.6; transform: scale(1); }
  90% { opacity: 0.2; }
  100% { opacity: 0; transform: translateY(-400px) scale(0.5); }
}

/* ─── Glow hover on stat items ──────────────────────────────── */
.stat-item:hover .stat-number {
  filter: brightness(1.2);
  transition: filter 0.3s ease;
}
.stat-number { transition: filter 0.3s ease; }

/* ─── Admin card shine ──────────────────────────────────────── */
.admin-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.02), transparent);
  transition: left 0.6s ease;
  pointer-events: none;
}
.admin-card { position: relative; overflow: hidden; }
.admin-card:hover::after { left: 100%; }

/* ─── Link item connection pulse ────────────────────────────── */
.link-item::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  border: 2px solid transparent;
  opacity: 0;
  transition: all 0.3s ease;
}
.link-item { position: relative; }
.link-item:hover::after {
  border-color: rgba(99, 102, 241, 0.3);
  opacity: 1;
}

/* ─── Smooth scroll indicator bounce ────────────────────────── */
.hero-scroll-indicator {
  animation: softBounce 3s ease-in-out infinite;
}
@keyframes softBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ─── Mobile nav animation ──────────────────────────────────── */
.nav-links.active {
  animation: slideDown 0.3s ease forwards;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-up { opacity: 1; transform: none; }
  .stagger > * { opacity: 1; transform: none; }
}