:root {
  color-scheme: dark;
  --bg: #090b0e;
  --panel: #11151a;
  --panel-2: #171c22;
  --border: #29313a;
  --text: #f4f7fb;
  --muted: #98a4b3;
  --accent: #d9ff45;
  --accent-ink: #101600;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(217,255,69,.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input { font: inherit; }
a { color: inherit; }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 44px 0 28px; }
.hero { display: grid; grid-template-columns: 1.35fr .65fr; gap: 42px; align-items: end; padding: 40px 0 54px; }
.eyebrow { margin: 0 0 10px; color: var(--accent); font-size: .76rem; letter-spacing: .17em; font-weight: 800; }
h1 { max-width: 820px; margin: 0; font-size: clamp(2.7rem, 7vw, 6.3rem); line-height: .92; letter-spacing: -.06em; }
h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.45rem); letter-spacing: -.04em; }
.lead { max-width: 720px; color: var(--muted); font-size: 1.08rem; line-height: 1.65; margin: 24px 0; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
button, .secondary, .upload span {
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; text-decoration: none; cursor: pointer;
  transition: transform .14s ease, border-color .14s ease, background .14s ease;
}
button:hover, .secondary:hover, .upload span:hover { transform: translateY(-1px); border-color: #46515d; }
.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 850; }
.primary:disabled { opacity: .35; cursor: not-allowed; transform: none; }
.secondary, .upload span { background: var(--panel); color: var(--text); }
.status { color: var(--muted); margin: 14px 0 0; font-size: .9rem; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric-grid article { border: 1px solid var(--border); background: linear-gradient(145deg, var(--panel), #0d1115); border-radius: 18px; padding: 20px; }
.metric-grid span, .spec-grid span, .result-stat span { color: var(--muted); font-size: .78rem; display: block; margin-bottom: 6px; }
.metric-grid strong { font-size: 2rem; letter-spacing: -.04em; }
.panel { border: 1px solid var(--border); background: rgba(17,21,26,.82); border-radius: 22px; padding: 26px; margin-bottom: 18px; backdrop-filter: blur(8px); }
.specs { display: grid; grid-template-columns: .35fr 1fr; gap: 28px; }
.spec-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.spec-grid > div { background: var(--panel-2); border: 1px solid var(--border); border-radius: 14px; padding: 15px; }
.spec-grid strong { font-size: .98rem; }
.tiny { color: var(--muted); font-size: .8rem; line-height: 1.55; }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.pill { border: 1px solid var(--border); color: var(--muted); border-radius: 999px; padding: 8px 11px; font-size: .78rem; }
.class-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
.class-card { display: flex; align-items: center; gap: 11px; background: var(--panel-2); border: 1px solid var(--border); padding: 14px; border-radius: 14px; }
.class-id { display: grid; place-items: center; width: 30px; height: 30px; background: #252d36; border-radius: 9px; color: var(--accent); font-weight: 800; font-size: .8rem; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 20px; }
.controls label:not(.upload) { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: .86rem; }
.upload input { position: absolute; opacity: 0; pointer-events: none; }
input[type="range"] { accent-color: var(--accent); }
output { min-width: 34px; color: var(--text); }
.stage-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 14px; }
.stage { position: relative; min-height: 480px; background: #050607; border: 1px dashed #37414c; border-radius: 18px; overflow: hidden; display: grid; place-items: center; }
.stage.drag { border-color: var(--accent); }
#canvas { width: 100%; height: auto; display: block; max-height: 72vh; object-fit: contain; }
.stage.empty #canvas { display: none; }
.empty-state { color: var(--muted); padding: 40px; text-align: center; }
.results { display: flex; flex-direction: column; gap: 10px; }
.result-stat, .detection-list { border: 1px solid var(--border); background: var(--panel-2); border-radius: 14px; padding: 14px; }
.result-stat strong { font-size: 1.2rem; }
.detection-list { flex: 1; max-height: 400px; overflow: auto; }
.detection-item { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid #27303a; font-size: .86rem; }
.detection-item:last-child { border-bottom: 0; }
.detection-item span:last-child { color: var(--accent); font-variant-numeric: tabular-nums; }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 20px 4px; color: var(--muted); font-size: .82rem; }
@media (max-width: 900px) {
  .hero, .specs, .stage-wrap { grid-template-columns: 1fr; }
  .spec-grid, .class-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .metric-grid { margin-top: 10px; }
  .stage { min-height: 320px; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 20px, 1180px); padding-top: 22px; }
  .panel { padding: 18px; border-radius: 18px; }
  .spec-grid, .class-grid { grid-template-columns: 1fr; }
  .controls { align-items: stretch; flex-direction: column; }
  .controls label:not(.upload) { justify-content: space-between; }
  .upload span, .controls button { display: block; width: 100%; text-align: center; }
  footer { flex-direction: column; }
}

.training-banner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: -22px 0 18px;
}
.training-banner > div {
  background: #0d1115;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}
.training-banner span {
  display: block;
  color: var(--accent);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .11em;
  margin-bottom: 7px;
}
.training-banner strong { font-size: .96rem; }
.table-wrap { overflow-x: auto; }
.metric-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.metric-table th, .metric-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.metric-table th { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.metric-table td:not(:first-child) { font-variant-numeric: tabular-nums; }
.metric-table tbody tr:hover { background: rgba(255,255,255,.025); }
@media (max-width: 900px) { .training-banner { grid-template-columns: repeat(2, minmax(0,1fr)); margin-top: -12px; } }
@media (max-width: 560px) { .training-banner { grid-template-columns: 1fr; } }