eryao/web/src/styles/animations.css

@import "tailwindcss";

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.12; }
  50% { opacity: 0.2; }
}

@keyframes particle-drift {
  0% { transform: translate(0, 0); }
  25% { transform: translate(10px, -20px); }
  50% { transform: translate(-5px, -40px); }
  75% { transform: translate(15px, -20px); }
  100% { transform: translate(0, 0); }
}

/* Reveal animations */
.reveal { opacity: 0; will-change: transform, opacity; }
.reveal.visible { animation: fade-in-up 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards; }

.reveal-left { opacity: 0; will-change: transform, opacity; }
.reveal-left.visible { animation: slide-in-left 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards; }

.reveal-right { opacity: 0; will-change: transform, opacity; }
.reveal-right.visible { animation: slide-in-right 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards; }

.reveal-scale { opacity: 0; will-change: transform, opacity; }
.reveal-scale.visible { animation: scale-in 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards; }

.reveal.visible.stagger-1 { animation-delay: 0.1s; }
.reveal.visible.stagger-2 { animation-delay: 0.2s; }
.reveal.visible.stagger-3 { animation-delay: 0.3s; }
.reveal.visible.stagger-4 { animation-delay: 0.4s; }
.reveal.visible.stagger-5 { animation-delay: 0.5s; }
.reveal.visible.stagger-6 { animation-delay: 0.6s; }

@media (max-width: 767px) {
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

/* Cyber gradient */
.cyber-gradient {
  background: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 50%, #C084FC 100%);
}

.cyber-glow {
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.35), 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Purple glow backgrounds */
.glow-bg {
  position: relative;
  overflow: hidden;
}
.glow-bg::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
  pointer-events: none;
  animation: glow-pulse 6s ease-in-out infinite;
}

.glow-bg-wide::before {
  width: 1200px;
  height: 800px;
}

/* Floating particles (pure CSS) */
.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.4);
  pointer-events: none;
}

.particle:nth-child(1) { top: 20%; left: 15%; animation: particle-drift 8s ease-in-out infinite; }
.particle:nth-child(2) { top: 40%; left: 75%; animation: particle-drift 12s ease-in-out infinite 1s; width: 3px; height: 3px; }
.particle:nth-child(3) { top: 60%; left: 30%; animation: particle-drift 10s ease-in-out infinite 2s; width: 5px; height: 5px; }
.particle:nth-child(4) { top: 30%; left: 55%; animation: particle-drift 9s ease-in-out infinite 3s; }
.particle:nth-child(5) { top: 70%; left: 85%; animation: particle-drift 11s ease-in-out infinite 4s; width: 3px; height: 3px; }
.particle:nth-child(6) { top: 50%; left: 10%; animation: particle-drift 7s ease-in-out infinite 5s; width: 2px; height: 2px; }
.particle:nth-child(7) { top: 15%; left: 65%; animation: particle-drift 13s ease-in-out infinite 2s; }
.particle:nth-child(8) { top: 80%; left: 45%; animation: particle-drift 8s ease-in-out infinite 6s; width: 3px; height: 3px; }

/* Connection lines between particles */
.particle-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 75% 40%, rgba(139, 92, 246, 0.04) 0%, transparent 35%),
    radial-gradient(circle at 30% 60%, rgba(139, 92, 246, 0.05) 0%, transparent 38%);
}

/* Hexagram lines */
.hex-yang {
  width: 9rem;
  height: 6px;
  border-radius: 9999px;
  background: linear-gradient(135deg, #8B5CF6, #C084FC);
}

.hex-yin {
  display: flex;
  align-items: center;
  gap: 4px;
}
.hex-yin > div {
  width: 3.5rem;
  height: 6px;
  border-radius: 9999px;
  background: rgba(139, 92, 246, 0.4);
}

/* Feature card hover */
.feature-card {
  transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.25);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.1);
}

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-left, .reveal-right, .reveal-scale { opacity: 1; transform: none; animation: none; }
  .particle { animation: none; }
  .glow-bg::before { animation: none; }
  html { scroll-behavior: auto; }
}