:root {
  color-scheme: dark;
  --bg: #050a12;
  --bg-soft: #07111f;
  --surface: rgba(13, 24, 41, 0.86);
  --surface-solid: #0d1829;
  --surface-light: #122039;
  --line: rgba(151, 177, 214, 0.16);
  --line-strong: rgba(151, 177, 214, 0.28);
  --text: #f4f8ff;
  --muted: #9fb0c8;
  --primary: #58d3c5;
  --primary-bright: #78f2e2;
  --secondary: #7ca8ff;
  --accent: #ff7a72;
  --warning: #ffd17b;
  --success: #63e6a7;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --max-width: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 10% 0%, rgba(55, 121, 166, 0.13), transparent 34rem),
    radial-gradient(circle at 92% 18%, rgba(64, 201, 178, 0.09), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

button, input { font: inherit; }
a { color: inherit; }
img { display: block; max-width: 100%; }

.ambient {
  position: fixed;
  width: 30rem;
  height: 30rem;
  border-radius: 999px;
  filter: blur(110px);
  opacity: 0.11;
  pointer-events: none;
  z-index: -1;
}
.ambient-one { top: -12rem; left: -10rem; background: #3e91ff; }
.ambient-two { top: 38rem; right: -14rem; background: #39d9ad; }

.section-shell, .site-header {
  width: min(var(--max-width), calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 13px; background: linear-gradient(145deg, rgba(88, 211, 197, 0.22), rgba(124, 168, 255, 0.18));
  border: 1px solid var(--line-strong); font-size: 21px;
}
.brand strong { display: block; font-size: 14px; letter-spacing: 0.01em; }
.brand small { display: block; color: var(--muted); font-size: 11px; margin-top: -2px; }
.header-actions { display: flex; align-items: center; gap: 18px; }
.text-link { text-decoration: none; color: var(--muted); font-size: 14px; }
.text-link:hover { color: var(--text); }

.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 12px;
  border: 1px solid transparent; text-decoration: none; cursor: pointer;
  font-weight: 700; font-size: 14px; transition: transform .18s ease, border-color .18s ease, background .18s ease, opacity .18s ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button:disabled { cursor: not-allowed; opacity: .48; }
.button-primary { color: #04100f; background: linear-gradient(135deg, var(--primary-bright), var(--primary)); box-shadow: 0 12px 28px rgba(88, 211, 197, .18); }
.button-secondary { background: rgba(124, 168, 255, .1); border-color: rgba(124, 168, 255, .28); color: #dce8ff; }
.button-quiet { background: rgba(255,255,255,.04); border-color: var(--line); color: var(--text); }

.hero {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
  gap: 72px; align-items: center; padding-top: 92px; padding-bottom: 66px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--primary-bright); text-transform: uppercase; letter-spacing: .14em;
  font-weight: 800; font-size: 11px;
}
.eyebrow.simple { color: var(--secondary); }
.eyebrow.warning { color: var(--warning); }
.pulse-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 5px rgba(99,230,167,.1); }
.hero h1 { margin: 18px 0 22px; max-width: 820px; font-size: clamp(42px, 5.5vw, 72px); line-height: 1.02; letter-spacing: -.045em; }
.hero-lead { max-width: 710px; margin: 0; color: #b7c5d8; font-size: clamp(17px, 1.7vw, 20px); line-height: 1.72; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 28px; color: var(--muted); font-size: 12px; }

.hero-card {
  position: relative; padding: 26px; border-radius: var(--radius-xl);
  background: linear-gradient(150deg, rgba(18, 36, 59, .94), rgba(8, 17, 31, .92));
  border: 1px solid var(--line-strong); box-shadow: var(--shadow); overflow: hidden;
}
.hero-card::before { content: ""; position: absolute; inset: -80px -80px auto auto; width: 220px; height: 220px; background: radial-gradient(circle, rgba(88,211,197,.16), transparent 68%); }
.hero-card-top { position: relative; display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.card-kicker { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .12em; }
.hero-card h2 { margin: 4px 0 0; font-size: 20px; }
.status-chip { flex: 0 0 auto; display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px; border-radius: 999px; font-size: 11px; font-weight: 800; border: 1px solid var(--line); }
.status-chip.loading { color: var(--warning); background: rgba(255,209,123,.08); }
.status-chip.ready { color: var(--success); background: rgba(99,230,167,.08); border-color: rgba(99,230,167,.2); }
.status-chip.error { color: #ffaaa5; background: rgba(255,122,114,.08); border-color: rgba(255,122,114,.22); }
.architecture-mini { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 190px; margin: 20px 0 12px; padding: 24px 10px; }
.arch-block, .arch-output { display: grid; place-items: center; border-radius: 9px; font-size: 11px; font-weight: 900; color: #dffefa; border: 1px solid rgba(88,211,197,.24); background: rgba(88,211,197,.08); }
.arch-block { width: 42px; height: 110px; }
.arch-block.lower { height: 78px; }
.arch-block.bottleneck { height: 54px; background: rgba(124,168,255,.11); border-color: rgba(124,168,255,.28); }
.arch-block.decoder { background: rgba(255,122,114,.08); border-color: rgba(255,122,114,.22); }
.arch-output { width: 46px; height: 42px; color: #ffe5e2; background: rgba(255,122,114,.12); }
.summary-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin: 0; }
.summary-grid div { padding: 12px 14px; border: 1px solid var(--line); background: rgba(255,255,255,.025); border-radius: 12px; }
.summary-grid dt { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.summary-grid dd { margin: 3px 0 0; font-size: 14px; font-weight: 800; }

.metric-strip { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.metric-strip article { padding: 20px 22px; background: rgba(8, 16, 29, .93); }
.metric-strip span, .result-metrics span { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.metric-strip strong { display: block; margin-top: 6px; font-size: 21px; }
.metric-strip small, .result-metrics small { display: block; color: #71839d; font-size: 10px; margin-top: 2px; }

.demo-section, .details-section { padding-top: 104px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 28px; }
.section-heading h2 { margin: 9px 0 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.12; letter-spacing: -.03em; }
.section-heading > p { max-width: 560px; margin: 0; color: var(--muted); font-size: 14px; }
.demo-grid { display: grid; grid-template-columns: 350px minmax(0, 1fr); gap: 18px; align-items: start; }
.control-panel, .results-panel { background: rgba(9, 18, 32, .82); border: 1px solid var(--line); border-radius: var(--radius-xl); box-shadow: 0 18px 50px rgba(0,0,0,.18); }
.control-panel { padding: 22px; position: sticky; top: 18px; }
.results-panel { padding: 22px; min-width: 0; }
.panel-heading, .results-toolbar > div { display: flex; align-items: center; gap: 12px; }
.panel-heading.compact { align-items: flex-start; }
.step-number { flex: 0 0 auto; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; background: rgba(124,168,255,.11); color: #a9c4ff; border: 1px solid rgba(124,168,255,.22); font-size: 11px; font-weight: 900; }
.panel-heading h3, .results-toolbar h3 { margin: 0; font-size: 15px; }
.panel-heading p, .results-toolbar p { margin: 1px 0 0; color: var(--muted); font-size: 11px; }
.upload-zone { min-height: 150px; margin-top: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; border: 1px dashed rgba(124,168,255,.34); border-radius: 16px; background: rgba(124,168,255,.035); cursor: pointer; transition: border-color .18s ease, background .18s ease, transform .18s ease; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: rgba(88,211,197,.055); transform: translateY(-1px); }
.upload-zone input, .small-upload input { position: absolute; opacity: 0; pointer-events: none; }
.upload-zone strong { margin-top: 8px; font-size: 13px; }
.upload-zone span:last-child { color: var(--muted); font-size: 11px; }
.upload-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: rgba(88,211,197,.1); color: var(--primary-bright); font-size: 20px; }
.sample-heading { display: flex; justify-content: space-between; gap: 12px; margin: 18px 0 9px; color: var(--muted); font-size: 11px; }
.sample-heading small { color: #70829b; }
.sample-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.sample-button { appearance: none; padding: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--surface-light); color: var(--muted); cursor: pointer; transition: border-color .18s ease, transform .18s ease; }
.sample-button:hover, .sample-button.active { border-color: var(--primary); transform: translateY(-1px); }
.sample-button img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.sample-button span { display: block; padding: 5px; font-size: 9px; }
.divider { height: 1px; background: var(--line); margin: 20px 0; }
.threshold-control { display: grid; grid-template-columns: 1fr 54px; gap: 12px; align-items: center; margin-top: 14px; }
.threshold-control input { accent-color: var(--primary); width: 100%; }
.threshold-control output { display: grid; place-items: center; min-height: 34px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.035); font-weight: 800; font-size: 12px; }
.ground-truth-details { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; }
.ground-truth-details summary { cursor: pointer; color: #c7d4e7; font-size: 12px; font-weight: 700; }
.ground-truth-details p { color: var(--muted); font-size: 11px; margin: 8px 0; }
.small-upload { display: inline-flex; min-height: 34px; align-items: center; padding: 0 12px; border-radius: 9px; border: 1px solid var(--line); background: rgba(255,255,255,.035); cursor: pointer; font-size: 11px; }
.predict-button { width: 100%; margin-top: 18px; }
.status-box { display: flex; gap: 9px; align-items: flex-start; margin-top: 12px; padding: 11px 12px; border-radius: 11px; background: rgba(255,255,255,.025); border: 1px solid var(--line); color: var(--muted); font-size: 10px; line-height: 1.45; }
.status-box.success { color: #aef3cf; border-color: rgba(99,230,167,.18); background: rgba(99,230,167,.04); }
.status-box.error { color: #ffb6b1; border-color: rgba(255,122,114,.22); background: rgba(255,122,114,.05); }
.status-spinner { flex: 0 0 auto; width: 11px; height: 11px; margin-top: 2px; border: 2px solid rgba(255,255,255,.18); border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; }
.status-box.success .status-spinner, .status-box.error .status-spinner { animation: none; border: 0; width: 10px; height: 10px; border-radius: 50%; background: currentColor; opacity: .75; }
@keyframes spin { to { transform: rotate(360deg); } }
.results-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 16px; }
.canvas-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.canvas-card { min-width: 0; margin: 0; padding: 10px; border-radius: 15px; background: rgba(255,255,255,.025); border: 1px solid var(--line); }
.canvas-card figcaption { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 2px 3px 9px; }
.canvas-card figcaption span { font-size: 11px; font-weight: 800; }
.canvas-card figcaption small { color: var(--muted); font-size: 9px; }
.canvas-wrap { position: relative; width: 100%; aspect-ratio: 1; overflow: hidden; border-radius: 11px; background: #04070c; }
.canvas-wrap canvas { width: 100%; height: 100%; display: block; image-rendering: auto; }
.empty-canvas { position: absolute; inset: 0; display: grid; place-items: center; color: #52627a; font-size: 11px; background: radial-gradient(circle at center, rgba(124,168,255,.05), transparent 60%); }
.result-metrics { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 8px; margin-top: 12px; }
.result-metrics article { min-width: 0; padding: 12px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.025); }
.result-metrics strong { display: block; margin-top: 4px; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.detailed-metrics { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.detailed-metrics span { flex: 1 1 120px; padding: 8px 11px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); font-size: 10px; }
.detailed-metrics strong { float: right; color: var(--text); }
.hidden { display: none !important; }

.details-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.detail-card { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(9,18,32,.72); }
.detail-icon { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; color: var(--primary-bright); background: rgba(88,211,197,.08); border: 1px solid rgba(88,211,197,.16); font-size: 11px; font-weight: 900; }
.detail-card h3 { margin: 16px 0 8px; font-size: 16px; }
.detail-card p { margin: 0; color: var(--muted); font-size: 12px; }
.limitations-card { margin-top: 18px; padding: 26px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 34px; align-items: center; border-radius: var(--radius-xl); border: 1px solid rgba(255,209,123,.18); background: linear-gradient(135deg, rgba(255,209,123,.055), rgba(9,18,32,.75)); }
.limitations-card h3 { margin: 8px 0 0; font-size: 21px; line-height: 1.3; }
.limitations-card p { margin: 0; color: #b8c4d5; font-size: 12px; }

.site-footer { margin-top: 104px; padding-block: 30px 42px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 24px; color: var(--muted); font-size: 12px; }
.site-footer strong { display: block; color: var(--text); }
.site-footer span { display: block; margin-top: 2px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--text); }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; gap: 38px; }
  .hero-card { max-width: 680px; }
  .demo-grid { grid-template-columns: 310px minmax(0,1fr); }
  .result-metrics { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .details-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 820px) {
  .metric-strip { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
  .demo-grid { grid-template-columns: 1fr; }
  .control-panel { position: static; }
  .limitations-card { grid-template-columns: 1fr; gap: 14px; }
}

@media (max-width: 600px) {
  .section-shell, .site-header { width: min(100% - 24px, var(--max-width)); }
  .site-header { min-height: 70px; }
  .header-actions .text-link { display: none; }
  .brand small { display: none; }
  .hero { padding-top: 64px; padding-bottom: 44px; }
  .hero h1 { font-size: 40px; }
  .hero-lead { font-size: 16px; }
  .hero-card { padding: 18px; }
  .metric-strip { grid-template-columns: 1fr; }
  .demo-section, .details-section { padding-top: 76px; }
  .control-panel, .results-panel { padding: 15px; border-radius: 20px; }
  .canvas-grid { grid-template-columns: 1fr; }
  .sample-grid { grid-template-columns: repeat(3, 1fr); }
  .details-grid { grid-template-columns: 1fr; }
  .site-footer { align-items: flex-start; flex-direction: column; margin-top: 76px; }
}