:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-secondary: #7c3aed;
  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #555566;
  --border: #2a2a3a;
  --border-hover: #3a3a4a;
  --radius: 16px;
  --radius-sm: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Sora', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Effects */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.bg-glow-1 {
  top: -200px;
  right: -100px;
  background: var(--accent-secondary);
}

.bg-glow-2 {
  bottom: -300px;
  left: -200px;
  background: var(--accent);
  opacity: 0.2;
}

/* Container */
.container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#particle-network {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

header > *:not(#particle-network) {
  position: relative;
  z-index: 1;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  font-size: 20px;
  color: var(--bg-primary);
}

.logo-text {
  font-family: 'Space Mono', monospace;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.highlight {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

.highlight:hover {
  opacity: 0.8;
}

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 40px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat {
  text-align: center;
}

.stat-value {
  font-family: 'Space Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  padding: 60px 0 100px;
}

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.3),
    0 0 60px var(--accent-glow);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.card:hover .card-icon {
  background: var(--accent-glow);
  border-color: var(--accent);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--text-secondary);
  transition: stroke 0.3s ease;
}

.card:hover .card-icon svg {
  stroke: var(--accent);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-arrow {
  position: absolute;
  bottom: 28px;
  right: 28px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s ease;
}

.card:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

.card-arrow svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  stroke: var(--text-muted);
  margin-bottom: 16px;
}

/* Loading */
.loading {
  display: flex;
  justify-content: center;
  padding: 80px 0;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Footer */
footer {
  text-align: center;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

footer a:hover {
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 60px 0 40px;
  }

  .stats {
    gap: 32px;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    padding: 40px 0 80px;
  }

  .card {
    padding: 24px;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

.card {
  opacity: 0;
}