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

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface2: #1a1a24;
  --surface3: #22222f;
  --border: #2a2a3a;
  --border2: #38384a;
  --accent: #00d3f3;
  --accent2: #33e5ff;
  --accent-glow: rgba(0,211,243,0.18);
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --text: #e8e8f0;
  --text2: #9090a8;
  --text3: #5a5a72;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Syne', sans-serif;
  --radius: 10px;
}

html, body { 
  height: 100%; 
  background: var(--bg); 
  color: var(--text); 
  font-family: var(--sans);
}

body { margin: 0; }

/* ---- HEADER ---- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  height: 70px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  cursor: pointer;
}

.header-logo .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 6px var(--accent); }
  50% { box-shadow: 0 0 18px var(--accent2); }
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.2s;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--accent);
}

.nav-link.active {
  color: var(--accent2);
}

/* ---- CONTENT ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ---- HERO SECTION ---- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 40px;
  min-height: 60vh;
}

.hero-title {
  font-size: 72px;
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #00d9ff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text2);
  max-width: 700px;
  line-height: 1.6;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn {
  padding: 14px 32px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
}

.btn-primary {
  background: linear-gradient(135deg, #00d9ff, var(--accent));
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 217, 255, 0.3);
}

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border2);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- ANIMATIONS SHOWCASE ---- */
.showcase {
  padding: 80px 0;
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

.showcase-title {
  font-size: 32px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 60px;
  color: var(--text);
}

.animation-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.animation-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  transition: all 0.3s;
}

.animation-card:hover {
  border-color: var(--accent);
  background: var(--surface3);
  transform: translateY(-4px);
}

.animation-demo {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.animation-label {
  font-size: 16px;
  font-weight: 700;
  color: var(--text2);
}

/* Animation Styles */
@keyframes fadeInOut {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-30px); }
}

@keyframes slideRight {
  0%, 100% { transform: translateX(-30px); }
  50% { transform: translateX(30px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.shape {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #00d9ff, var(--accent));
  border-radius: 10px;
}

.demo-fade {
  animation: fadeInOut 2s ease-in-out infinite;
}

.demo-bounce {
  animation: bounce 2s ease-in-out infinite;
}

.demo-slide {
  animation: slideRight 2s ease-in-out infinite;
}

.demo-spin {
  animation: spin 3s linear infinite;
}

/* ---- FEATURES SECTION ---- */
.features {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.features-title {
  font-size: 32px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 60px;
  color: var(--text);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  text-align: center;
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent2);
}

.feature-desc {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.6;
}

/* ---- CTA SECTION ---- */
.cta {
  padding: 60px 40px;
  text-align: center;
  margin-top: 80px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 20px;
}

.cta-text {
  font-size: 16px;
  color: var(--text2);
  margin-bottom: 30px;
}

/* ---- FOOTER ---- */
.footer {
  padding: 40px;
  text-align: center;
  color: var(--text3);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .animation-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 48px;
  }

  .nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 12px;
  }
}