:root {
  color-scheme: dark;
  --bg: #06060f;
  --bg-elevated: #0c0c18;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f0f0f5;
  --muted: #9b9bb0;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 45%, #22d3ee 100%);
  font-family:
    'Inter',
    system-ui,
    -apple-system,
    sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(34, 211, 238, 0.08), transparent);
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  backdrop-filter: blur(12px);
  background: rgba(6, 6, 15, 0.75);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--muted);
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font: 600 15px/1 inherit;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition:
    transform 0.15s,
    box-shadow 0.15s,
    opacity 0.15s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 24px rgba(139, 92, 246, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 32px rgba(139, 92, 246, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* Hero */
.hero {
  padding: 80px 0 100px;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 28px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: 999px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero h1 .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 1.125rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-trust {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.hero-trust strong {
  color: var(--text);
  font-weight: 600;
}

/* Live stats strip */
.live-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  padding: 24px 32px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;

}

.live-stat {
  text-align: center;
}

.live-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.live-stat-value.online {
  color: #34d399;
}

.live-stat-label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

/* Sections */
section {
  padding: 80px 0;
}

.section-label {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.section-title {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-desc {
  max-width: 560px;
  margin: 0 0 48px;
  color: var(--muted);
  font-size: 1.05rem;
}

/* Feature cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(139, 92, 246, 0.3);
}

.feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.15);
  display: grid;
  place-items: center;
  font-size: 20px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.55;
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.step {
  position: relative;
  padding-top: 8px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 16px;
  font-weight: 700;
  font-size: 14px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* Architecture diagram */
.arch-diagram {
  padding: 32px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow-x: auto;
}

.arch-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 8px;
  font: 14px/1.4 ui-monospace, monospace;
  color: var(--muted);
}

.arch-node {
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
}

.arch-node strong {
  display: block;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  margin-bottom: 4px;
}

.arch-node.highlight {
  border-color: rgba(139, 92, 246, 0.4);
  background: rgba(139, 92, 246, 0.1);
}

.arch-arrow {
  color: var(--accent);
  font-size: 18px;
}

/* Code block */
.code-panel {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #010409;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

.code-panel pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  font: 13px/1.6 ui-monospace, SFMono-Regular, monospace;
  color: #c9d1d9;
}

.code-panel .kw {
  color: #ff7b72;
}
.code-panel .str {
  color: #a5d6ff;
}
.code-panel .fn {
  color: #d2a8ff;
}

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

.model-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-elevated);
}

.model-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.model-card p {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
}

.model-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 6px;
  background: rgba(52, 211, 153, 0.12);
  color: #34d399;
}

/* CTA footer */
.cta-section {
  text-align: center;
  padding: 100px 0 120px;
}

.cta-section h2 {
  margin: 0 0 12px;
  font-size: 2rem;
  font-weight: 700;
}

.cta-section p {
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 1.05rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.site-footer a {
  color: var(--accent-2);
}

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

@media (max-width: 640px) {
  .nav-links .nav-hide-mobile {
    display: none;
  }

  .hero {
    padding: 48px 0 64px;
  }

  section {
    padding: 56px 0;
  }
}