style.css

:root {
  --brand: #1565ff;
  --brand-dark: #001530;
  --brand-soft: #e8f0ff;
  --bg: #ffffff;
  --bg-muted: #f6f8fc;
  --bg-dark: #001530;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-strong: #c7d7f5;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(21, 101, 255, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

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

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--brand-dark);
}

.brand-text small {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

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

.nav-cta {
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--brand);
  color: #fff !important;
}

.nav-cta:hover {
  background: #0d52d9;
  color: #fff !important;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero {
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(circle at top right, rgba(21, 101, 255, 0.08), transparent 34%),
    linear-gradient(180deg, #fff, #f8fbff);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.3rem, 4.8vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--brand-dark);
}

.accent-text {
  color: var(--brand);
}

.hero-lead {
  margin: 0 0 1.5rem;
  max-width: 34rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.hero-actions,
.demo-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.15rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    transform 0.15s ease;
}

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

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  background: #0d52d9;
}

.btn-secondary {
  background: #fff;
  color: var(--brand-dark);
  border-color: var(--border);
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
}

.hero-stats div {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
}

.hero-stats dt {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-stats dd {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--brand-dark);
}

.hero-visual-card {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.hero-visual-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pill--live {
  background: #dcfce7;
  color: #166534;
}

.section {
  padding: 4.5rem 0;
}

.section--muted {
  background: var(--bg-muted);
}

.section-head {
  max-width: 680px;
  margin-bottom: 2.25rem;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  letter-spacing: -0.03em;
  color: var(--brand-dark);
}

.section-lead {
  margin: 0;
  color: var(--text-secondary);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
}

.compare-card {
  margin: 0;
}

.compare-card figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.compare-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--brand-dark);
}

.compare-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.compare-frame {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.compare-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.compare-card--highlight .compare-frame {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

.compare-arrow {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
}

.performance-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.note-card {
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
}

.note-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  color: var(--brand-dark);
}

.note-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.feature-grid,
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card,
.usecase-card {
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-card h3,
.usecase-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  color: var(--brand-dark);
}

.feature-card p,
.usecase-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.usecase-tag {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.demo-shell {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  background: #fff;
  box-shadow: var(--shadow);
}

.demo-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.demo-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot--loading {
  background: var(--warning);
  animation: pulse 1.4s ease infinite;
}

.status-dot--ready {
  background: var(--success);
}

.status-dot--error {
  background: var(--danger);
}

@keyframes pulse {
  50% {
    opacity: 0.4;
  }
}

.demo-metrics {
  display: flex;
  gap: 0.65rem;
}

.metric-pill {
  min-width: 88px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-muted);
}

.metric-pill-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.metric-pill-value {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand-dark);
}

.dropzone {
  display: block;
  margin-bottom: 1rem;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-muted);
  cursor: pointer;
  transition:
    border-color 0.15s ease,
    background 0.15s ease;
}

.dropzone:hover,
.dropzone.is-dragover {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.dropzone-inner {
  padding: 1.6rem 1rem;
  text-align: center;
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 0.75rem;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #fff;
  color: var(--brand);
  border: 1px solid var(--border);
}

.dropzone-icon svg {
  width: 22px;
  height: 22px;
}

.dropzone p {
  margin: 0;
}

.dropzone-hint {
  margin-top: 0.35rem !important;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.canvas-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.canvas-card {
  margin: 0;
}

.canvas-card figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-dark);
}

.canvas-card--highlight figcaption {
  color: var(--brand);
}

.canvas-frame {
  position: relative;
  min-height: 220px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #f1f5f9;
}

.canvas-frame canvas {
  display: none;
  width: 100%;
  height: auto;
}

.canvas-frame.has-image canvas {
  display: block;
}

.canvas-frame.has-image .canvas-placeholder {
  display: none;
}

.canvas-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.output-badge {
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 0.72rem;
}

.output-badge.hidden {
  display: none;
}

.json-panel {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-muted);
}

.json-panel summary {
  padding: 0.8rem 1rem;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}

.json-panel pre {
  margin: 0;
  padding: 0 1rem 1rem;
  max-height: 260px;
  overflow: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.cta-section {
  padding: 1rem 0 4rem;
}

.cta-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.75rem;
  border-radius: calc(var(--radius) + 4px);
  background: var(--brand-dark);
  color: #fff;
}

.cta-logo {
  border-radius: 12px;
}

.cta-copy h2 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
}

.cta-copy p {
  margin: 0;
  color: #cbd5e1;
  max-width: 38rem;
  font-size: 0.95rem;
}

.cta-card .btn-primary {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: none;
}

.cta-card .btn-primary:hover {
  background: var(--brand-soft);
}

.cta-card .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
}

.cta-card .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0 2rem;
  background: #fff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}

.footer-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.84rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .usecase-grid,
  .canvas-grid,
  .performance-notes {
    grid-template-columns: 1fr;
  }

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

  .compare-arrow {
    margin: 0 auto;
    transform: rotate(90deg);
  }

  .cta-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .cta-actions {
    justify-content: center;
  }

  .nav a:not(.nav-cta) {
    display: none;
  }
}

@media (max-width: 560px) {
  .hero {
    padding-top: 3rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .demo-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}