:root {
  --bg: #f3f9ff;
  --panel: #ffffff;
  --panel-border: #e8eaf1;
  --accent: #0d83fd;
  --accent-soft: #e8f3ff;
  --accent2: #16a072;
  --accent2-soft: #e6f7f1;
  --text: #212529;
  --text-dim: #8890a2;
  --danger: #e0555a;
  --danger-soft: #fdeceb;
  --shadow: 0 8px 28px rgba(45,70,94,0.08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}
header {
  width: min(1180px, calc(100% - 32px));
  margin: 18px auto 0;
  padding: 10px 22px;
  background: rgba(255,255,255,.96);
  border: 1px solid var(--panel-border);
  border-radius: 50px;
  box-shadow: 0 2px 15px rgba(0,0,0,.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.brand { display: flex; align-items: center; flex: 0 0 auto; }
.brand img { display: block; max-height: 38px; width: auto; }
.product-title { flex: 1; min-width: 190px; }
header h1 {
  font-size: 18px;
  margin: 0;
  font-family: "Nunito", sans-serif;
  font-weight: 800;
  color: #2d465e;
}
header .sub {
  color: var(--text-dim);
  font-size: 12px;
}
header .right {
  display: flex;
  align-items: center;
  gap: 10px;
}

#nav-links {
  display: flex;
  gap: 4px;
  margin-right: 4px;
}
#nav-links a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
}
#nav-links a:hover { background: var(--bg); color: var(--text); }
#nav-links a.active { background: var(--accent-soft); color: var(--accent); }

#lang-switch {
  display: flex;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
#lang-switch button {
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: none;
}
#lang-switch button.active {
  background: var(--accent);
  color: #fff;
}
#lang-switch button:hover:not(.active) { color: var(--text); opacity: 1; }

#status-badge {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
}
#status-badge.ready { color: var(--accent2); border-color: #cdeee0; background: var(--accent2-soft); }
#status-badge.error { color: var(--danger); border-color: #f6d3d2; background: var(--danger-soft); }

main {
  display: grid;
  grid-template-columns: minmax(320px, 640px) minmax(280px, 420px);
  gap: 20px;
  padding: 20px 24px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
@media (max-width: 860px) {
  main { grid-template-columns: 1fr; }
}
main.wide {
  grid-template-columns: 1fr;
  max-width: 1100px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
}
.panel h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin: 0 0 12px;
  font-weight: 600;
}

#video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #10131c;
  border-radius: 10px;
  overflow: hidden;
}
#video-wrap video, #video-wrap canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
#overlay { pointer-events: none; }

#gesture-state {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(20,24,36,0.55);
  backdrop-filter: blur(4px);
  color: #dfe3ee;
  transition: color 0.15s, background 0.15s;
}
#gesture-state.active {
  color: #0b3d2c;
  background: var(--accent2);
  font-weight: 600;
}

#fps-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(20,24,36,0.55);
  color: #dfe3ee;
}

.controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.05s;
}
button:hover { opacity: 0.9; }
button:active { transform: scale(0.98); }
button.secondary {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
}
button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#prediction-box {
  text-align: center;
  padding: 22px 10px;
}
#pred-word {
  font-size: 34px;
  font-weight: 700;
  min-height: 44px;
  color: var(--accent2);
  word-break: break-word;
}
#pred-word.empty { color: var(--text-dim); font-size: 18px; font-weight: 400; }
#pred-conf {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 4px;
}

.topk-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 13px;
}
.topk-row:last-child { border-bottom: none; }
.topk-row .name { flex: 1; }
.name-latin {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
}
.topk-bar {
  flex: 1;
  height: 6px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
}
.topk-bar > div {
  height: 100%;
  background: var(--accent);
}
.topk-row .pct {
  width: 44px;
  text-align: right;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

#history {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
}
#history li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--panel-border);
  font-size: 13px;
}
#history li:first-child { color: var(--accent2); font-weight: 600; }
#history .t { color: var(--text-dim); font-variant-numeric: tabular-nums; }

.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  padding: 6px 0;
  color: var(--text-dim);
}
.settings-row input[type="range"] { width: 140px; accent-color: var(--accent); }
.settings-row .val { color: var(--text); width: 36px; text-align: right; }

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  padding: 20px 24px 24px;
}

/* ---- Results page ---- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.stat-card {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 12px 14px;
}
.stat-card .label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.stat-card .value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.stat-card .value.accent { color: var(--accent2); }

.hparam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px 16px;
  font-size: 13px;
}
.hparam-grid .k { color: var(--text-dim); }
.hparam-grid .row { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px dashed var(--panel-border); }

.fold-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.fold-tabs button {
  background: var(--bg);
  color: var(--text-dim);
  border: 1px solid var(--panel-border);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.fold-tabs button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.fold-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 13px;
}
.fold-bar-row .name { width: 90px; color: var(--text-dim); }
.fold-bar-row .bar {
  flex: 1;
  height: 10px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
}
.fold-bar-row .bar > div { height: 100%; background: var(--accent2); border-radius: 999px; }
.fold-bar-row .pct { width: 52px; text-align: right; font-variant-numeric: tabular-nums; }

.chart-wrap { position: relative; width: 100%; }
.chart-wrap canvas { width: 100%; height: 220px; display: block; }
.chart-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 8px;
}
.chart-legend .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 5px; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.data-table th, table.data-table td {
  text-align: left;
  padding: 7px 8px;
  border-bottom: 1px solid var(--panel-border);
}
table.data-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
table.data-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data-table tr:hover td { background: var(--bg); }

.confmat-img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  display: block;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  header { border-radius: 22px; padding: 14px; align-items: flex-start; }
  header .right { width: 100%; flex-wrap: wrap; }
  #nav-links { width: 100%; overflow-x: auto; }
}