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

:root {
  --color-bg: #0a0a0f;
  --color-surface: #12121a;
  --color-surface-hover: #1a1a25;
  --color-border: #2a2a3a;
  --color-text: #e4e4ec;
  --color-text-muted: #9494a8;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-accent: #22d3ee;
  --color-gradient-start: #6366f1;
  --color-gradient-end: #22d3ee;
  --radius: 12px;
  --radius-sm: 8px;
  --container-max: 1120px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.1rem;
}

.logo svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Hero */
.hero {
  padding: 160px 0 100px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 20px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--color-primary-hover);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
}

.hero-tech {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.tech-badge {
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-weight: 500;
  color: var(--color-text);
}

/* Features */
.features {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Categories */
.categories {
  padding: 100px 0;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.category-card {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  position: relative;
  transition: border-color 0.2s;
}

.category-card:hover {
  border-color: var(--color-text-muted);
}

.category-card.highlight {
  border-color: var(--color-accent);
  background: rgba(34, 211, 238, 0.03);
}

.category-count {
  display: inline-block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary-hover);
  margin-bottom: 8px;
}

.category-card.highlight .category-count {
  color: var(--color-accent);
}

.category-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.category-card p {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

/* SDK Section */
.sdk-section {
  padding: 100px 0;
}

.code-block {
  max-width: 680px;
  margin: 0 auto 40px;
  background: #0d0d14;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-title {
  margin-left: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.code-block pre {
  padding: 20px 24px;
  overflow-x: auto;
}

.code-block code {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-text);
}

.code-block .comment {
  color: #6b7280;
}

.sdk-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  max-width: 680px;
  margin: 0 auto;
}

.sdk-feature strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.sdk-feature p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* CTA */
.cta {
  padding: 100px 0;
  text-align: center;
}

.cta h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.cta p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.cta-actions {
  margin-bottom: 24px;
}

.cta-install {
  display: inline-block;
  padding: 12px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.cta-install code {
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Footer */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer a {
  color: var(--color-primary-hover);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Mobile drawer */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
}

.menu-toggle:hover {
  background: var(--color-surface-hover);
}

.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  visibility: hidden;
}

.mobile-drawer.open {
  pointer-events: auto;
  visibility: visible;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-drawer.open .drawer-backdrop {
  opacity: 1;
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 80vw;
  height: 100%;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  padding: 1.5rem;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}

.mobile-drawer.open .drawer-panel {
  transform: translateX(0);
}

.drawer-close {
  align-self: flex-end;
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  margin-bottom: 1.5rem;
}

.drawer-close:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}

.drawer-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .features,
  .categories,
  .sdk-section,
  .cta {
    padding: 60px 0;
  }

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

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 480px) {
  .categories-grid {
    grid-template-columns: 1fr;
  }
}