:root {
  --bg: #060a16;
  --panel: rgba(15, 22, 43, 0.72);
  --panel-solid: #121b35;
  --text: #f2f6ff;
  --muted: #a8b5d7;
  --primary: #5e8bff;
  --accent: #38d4c8;
  --danger: #ff5c7a;
  --ok: #28d07a;
  --border: rgba(151, 174, 255, 0.24);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 30% 10%, #15244b 0%, transparent 35%), var(--bg);
  min-height: 100vh;
}

.container { width: min(1120px, 92%); margin: 0 auto; }

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
  z-index: -3;
}
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -2;
}
.orb-1 { width: 380px; height: 380px; background: rgba(94, 139, 255, 0.32); top: -120px; right: -60px; }
.orb-2 { width: 320px; height: 320px; background: rgba(56, 212, 200, 0.2); bottom: -120px; left: -40px; }

.nav-wrap {
  position: sticky;
  top: 0;
  backdrop-filter: blur(14px);
  background: rgba(6, 10, 22, 0.7);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
}
.nav-links { display: flex; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav-links a:hover { color: var(--text); }

.btn {
  border: none;
  border-radius: 12px;
  padding: 11px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: .25s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #7a6dff);
  color: #fff;
  box-shadow: 0 8px 24px rgba(80, 118, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr .9fr;
  gap: 26px;
  padding: 56px 0 30px;
}
.eyebrow {
  color: var(--accent);
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 700;
}
.hero-copy h1 {
  margin: 8px 0 14px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.08;
}
.subtext { color: var(--muted); max-width: 60ch; }
.hero-cta { margin-top: 22px; display: flex; gap: 10px; flex-wrap: wrap; }
.trust-row { margin-top: 16px; display: flex; gap: 14px; flex-wrap: wrap; color: var(--muted); font-size: .92rem; }

.hero-card,
.feature-card,
.demo-panel,
.use-grid article,
.result-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
}
.hero-card { padding: 18px; }
.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.metric-grid p { margin: 0 0 5px; color: var(--muted); font-size: .84rem; }
.metric-grid h4 { margin: 0; font-size: 1.2rem; }
.mini-chart {
  margin-top: 14px;
  height: 70px;
  display: flex;
  align-items: flex-end;
  gap: 6px;
}
.mini-chart span {
  flex: 1;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(to top, var(--primary), var(--accent));
  opacity: .9;
}

.section { padding: 32px 0; }
.section-head h2 { margin-top: 6px; font-size: clamp(1.4rem, 2vw, 2rem); }
.feature-grid,
.use-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
}
.feature-card,
.use-grid article { padding: 16px; }
.feature-card p,
.use-grid p { color: var(--muted); }

.demo-panel { padding: 18px; }
.upload-zone {
  border: 1px dashed rgba(151,174,255,0.5);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  background: rgba(10, 16, 34, 0.6);
}
.upload-zone.dragover { border-color: var(--accent); background: rgba(16, 37, 55, 0.65); }
.upload-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.upload-sub { color: var(--muted); margin-top: 0; }
.file-name { color: var(--accent); min-height: 20px; }

.demo-actions { display: flex; gap: 10px; margin-top: 14px; }
.api-status {
  margin-left: auto;
  align-self: center;
  color: var(--muted);
  font-size: .9rem;
}
.result-shell { margin-top: 16px; background: rgba(8, 14, 30, 0.75); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.result-header { display: flex; justify-content: space-between; align-items: center; }
.pill { border-radius: 999px; padding: 5px 10px; border: 1px solid var(--border); color: var(--muted); font-size: .82rem; }
.result-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.result-card { padding: 12px; }
.result-card p { margin: 0 0 5px; color: var(--muted); font-size: .84rem; }
.result-card h4 { margin: 0; font-size: 1.1rem; }

.progress-wrap { margin-top: 12px; }
.progress-wrap label { display: block; margin-bottom: 6px; color: var(--muted); }
.progress-bar { width: 100%; height: 10px; border-radius: 999px; background: rgba(255,255,255,0.1); overflow: hidden; }
.progress-bar span { display: block; width: 0%; height: 100%; background: linear-gradient(90deg, var(--danger), #f4d35e, var(--ok)); transition: width .45s ease; }

.viz-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.viz-card {
  background: rgba(12, 20, 38, 0.8);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
}

.viz-card p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: .85rem;
}

.viz-stage {
  min-height: 220px;
  border-radius: 10px;
  border: 1px dashed rgba(151,174,255,0.35);
  display: grid;
  place-items: center;
  overflow: hidden;
  background: rgba(5, 8, 16, 0.9);
}

.viz-stage img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
}

.viz-overlay-stage {
  position: relative;
}

.viz-overlay-stage .mask-layer {
  position: absolute;
  inset: 0;
  mix-blend-mode: screen;
  opacity: 0.82;
}

.export-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  align-items: center;
}

.export-actions .btn {
  width: 100%;
  max-width: 320px;
}

.export-hint {
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  margin: 0;
}

.footer { padding: 34px 0 40px; color: var(--muted); font-size: .9rem; }

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; }
  .feature-grid, .use-grid { grid-template-columns: 1fr; }
  .viz-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}