/* ============================
   KEYFRAME ANIMATIONS
   ============================ */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.85); } to { opacity: 1; transform: scale(1); } }
@keyframes slideInLeft { from { opacity: 0; transform: translateX(-50px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(50px); } to { opacity: 1; transform: translateX(0); } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes rotate-ring { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes pulse-glow { 0%, 100% { opacity: 0.3; transform: scale(1); } 50% { opacity: 0.6; transform: scale(1.05); } }
@keyframes bounce-down { 0%, 100% { transform: translateY(0) rotate(45deg); } 50% { transform: translateY(6px) rotate(45deg); } }

/* ============================
   REVEAL SYSTEM
   ============================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Scroll indicator */
.scroll-indicator { position: absolute; bottom: var(--space-8); left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: var(--space-2); color: var(--text-muted); font-size: var(--text-xs); animation: fadeIn 1s 2s both; }
.scroll-arrow { width: 12px; height: 12px; border-right: 2px solid var(--accent-primary); border-bottom: 2px solid var(--accent-primary); transform: rotate(45deg); animation: bounce-down 1.5s ease-in-out infinite; }

/* Particles */
#particles-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }

/* Mobile Menu */
.mobile-menu { display: none; position: absolute; top: var(--navbar-height); left: 0; right: 0; background: var(--glass-bg); backdrop-filter: var(--glass-blur); border-bottom: 1px solid var(--glass-border); padding: var(--space-4); transform: translateY(-10px); opacity: 0; transition: opacity var(--transition-base), transform var(--transition-base); }
.mobile-menu.open { display: block; transform: translateY(0); opacity: 1; }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: var(--space-2); }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: var(--radius-full); transition: all var(--transition-base); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
  #particles-canvas { display: none; }
}