/* Keyframe animations */

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.05); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes particleFloat {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
    opacity: 0.3;
  }
  25% {
    transform: translate(10px, -20px) rotate(90deg);
    opacity: 0.6;
  }
  50% {
    transform: translate(-5px, -40px) rotate(180deg);
    opacity: 0.4;
  }
  75% {
    transform: translate(-15px, -20px) rotate(270deg);
    opacity: 0.5;
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Glassmorphism utility */
.glass {
  background: var(--color-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* Animated gradient background */
.animated-gradient {
  background: linear-gradient(
    135deg,
    var(--color-dark) 0%,
    var(--color-primary-dark) 25%,
    var(--color-dark) 50%,
    var(--color-primary-dark) 75%,
    var(--color-dark) 100%
  );
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

/* Glow effect */
.glow {
  position: relative;
}

.glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-base);
  filter: blur(12px);
}

.glow:hover::before {
  opacity: 0.5;
}

/* Logo float animation */
.logo-float {
  animation: float 4s ease-in-out infinite;
}

/* Particle dots (CSS-only) */
.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary-light);
  border-radius: 50%;
  opacity: 0.3;
  animation: particleFloat 8s ease-in-out infinite;
}

.particle:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { top: 60%; left: 80%; animation-delay: 1s; width: 6px; height: 6px; }
.particle:nth-child(3) { top: 40%; left: 50%; animation-delay: 2s; }
.particle:nth-child(4) { top: 80%; left: 30%; animation-delay: 3s; width: 3px; height: 3px; }
.particle:nth-child(5) { top: 15%; left: 70%; animation-delay: 4s; }
.particle:nth-child(6) { top: 70%; left: 60%; animation-delay: 5s; width: 5px; height: 5px; }

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

  .animated-gradient,
  .logo-float,
  .particle {
    animation: none;
  }
}