:root {
  --bg:      #0f172a;
  --surface: #1e293b;
  --border:  #334155;
  --muted:   #64748b;
  --text:    #e2e8f0;
  --indigo:  #6366f1;
  --green:   #22c55e;
  --amber:   #f59e0b;
  --red:     #ef4444;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 48px;
  gap: 16px;
}

/* ── loading overlay ── */
#loading-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px;
}
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--indigo);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 14px; font-weight: 600; color: var(--muted); }
.loading-sub  { font-size: 12px; color: #475569; }

/* ── header ── */
.top-bar {
  width: 100%; max-width: 860px;
  display: flex; align-items: center; justify-content: space-between;
}
h1 { font-size: 20px; font-weight: 700; letter-spacing: -0.5px; }
.badge {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 9999px; padding: 4px 14px;
  font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: 0.3px;
}

/* ── status pill ── */
.pill {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 16px; border-radius: 9999px;
  font-size: 12px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.6px; transition: background 0.3s;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: rgba(255,255,255,0.65); }

/* ── error ── */
.error-box {
  width: 100%; max-width: 860px;
  background: #7f1d1d; color: #fca5a5;
  border-radius: 10px; padding: 12px 20px;
  font-size: 14px; text-align: center; display: none;
}

/* ── mode tabs ── */
.mode-tabs {
  display: flex;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border);
  width: 100%; max-width: 860px;
}
.mode-tab {
  flex: 1; padding: 10px 16px;
  background: var(--surface);
  border: none; color: var(--muted);
  font-size: 13px; font-weight: 600;
  cursor: pointer; font-family: inherit;
  transition: color 0.15s, box-shadow 0.15s;
}
.mode-tab.active { color: var(--text); box-shadow: inset 0 -2px 0 var(--indigo); }
.mode-tab:hover:not(.active) { color: var(--text); }

/* ── tab panes ── */
#pane-camera,
#pane-upload {
  width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}

/* ── camera ── */
.video-wrap {
  position: relative;
  width: 100%; max-width: 860px;
  aspect-ratio: 16/9;
  background: var(--surface);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 4px 32px rgba(0,0,0,0.5);
}
#video  { width: 100%; height: 100%; object-fit: cover; display: block; transform: scaleX(-1); }
#canvas { position: absolute; inset: 0; width: 100%; height: 100%; transform: scaleX(-1); }
.pause-btn {
  position: absolute; bottom: 10px; left: 12px;
  background: rgba(15,23,42,0.75); backdrop-filter: blur(4px);
  border: 1px solid var(--border); border-radius: 9999px;
  padding: 3px 12px; font-size: 13px; color: var(--muted);
  cursor: pointer; transition: color 0.15s, border-color 0.15s;
}
.pause-btn:hover        { color: var(--text); border-color: var(--text); }
.pause-btn.paused       { color: var(--amber); border-color: var(--amber); }

.fps-badge {
  position: absolute; bottom: 10px; right: 12px;
  background: rgba(15,23,42,0.75); backdrop-filter: blur(4px);
  border: 1px solid var(--border); border-radius: 9999px;
  padding: 3px 10px; font-size: 11px; font-weight: 700; color: var(--muted);
  pointer-events: none;
}

/* ── shared card chrome ── */
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg); border-bottom: 1px solid var(--border);
  font-size: 13px; font-weight: 600;
}
.conf-pill {
  padding: 2px 10px; border-radius: 9999px;
  font-size: 11px; font-weight: 800; transition: all 0.2s;
}
.card-body { padding: 0 20px 20px; }

/* ── hero sign (shared) ── */
.hero-sign {
  font-size: 84px; font-weight: 800; line-height: 1;
  direction: rtl; transition: color 0.2s;
  min-width: 96px; text-align: center;
}
.hero-sign.idle { color: var(--border); }

/* ── confidence track (shared) ── */
.hero-conf-track {
  height: 8px; background: var(--bg); border-radius: 9999px; overflow: hidden;
}
.hero-conf-fill { height: 100%; border-radius: 9999px; transition: width 0.25s ease, background 0.3s; }
.hero-conf-label { font-size: 12px; color: var(--muted); font-weight: 600; }

/* ── top-3 list (shared) ── */
.top3 { display: flex; flex-direction: column; gap: 9px; border-top: 1px solid var(--border); padding-top: 14px; }
.top3-row { display: flex; align-items: center; gap: 10px; }
.top3-rank { font-size: 10px; font-weight: 700; color: var(--muted); min-width: 14px; }
.top3-sign { font-size: 20px; font-weight: 700; direction: rtl; min-width: 30px; text-align: center; color: var(--text); }
.top3-track { flex: 1; height: 5px; background: var(--bg); border-radius: 9999px; overflow: hidden; }
.top3-fill  { height: 100%; border-radius: 9999px; background: var(--indigo); transition: width 0.2s ease; }
.top3-pct   { font-size: 12px; font-weight: 600; color: var(--muted); min-width: 46px; text-align: right; }

/* ── site mode: single result card ── */
.result-card {
  width: 100%; max-width: 860px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
  transition: border-color 0.3s;
}
.result-card.high   { border-color: var(--green); }
.result-card.medium { border-color: var(--amber); }
.result-card.low    { border-color: var(--red); }

.hero-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 16px 0 12px;
}
.hero-right { flex: 1; display: flex; flex-direction: column; gap: 10px; }

/* ── mode wrappers ── */
#m-site,
#m-serve,
#up-m-site,
#up-m-serve { display: contents; }

/* ── serve mode: dual cards ── */
.cards {
  width: 100%; max-width: 860px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
.model-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
  transition: border-color 0.3s;
}
.model-card.agree { border-color: var(--green); }

.model-card .card-body {
  display: flex; flex-direction: column; align-items: center;
  padding: 16px 20px 20px; gap: 12px;
}
.model-card .hero-sign { font-size: 76px; }

/* ── serve mode: consensus ── */
.consensus {
  width: 100%; max-width: 860px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 20px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
  display: flex; align-items: center; gap: 14px;
  font-size: 14px; transition: border-color 0.3s, background 0.3s;
}
.consensus.agree    { border-color: var(--green); background: #052e16; }
.consensus.disagree { border-color: var(--amber); background: #1c1400; }
.consensus-label { color: var(--muted); font-weight: 600; flex-shrink: 0; font-size: 12px; }
.consensus-sign  { font-size: 28px; font-weight: 800; direction: rtl; }
.consensus-sign.idle { color: var(--border); }
.consensus-text  { color: #94a3b8; font-size: 13px; }

/* ── camera & pipeline info panel ── */
.info-panel {
  width: 100%; max-width: 860px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.info-header {
  padding: 10px 16px;
  background: var(--bg); border-bottom: 1px solid var(--border);
  font-size: 13px; font-weight: 600; color: var(--muted);
}
.info-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
}
.info-key,
.info-val {
  padding: 8px 16px;
  font-size: 12px;
  border-bottom: 1px solid var(--border);
}
.info-key {
  color: var(--muted); font-weight: 600;
  background: rgba(0,0,0,0.2);
  border-right: 1px solid var(--border);
}
.info-val { color: var(--text); font-family: 'Fira Code', 'Cascadia Code', monospace; }
.info-grid > :nth-last-child(-n+2) { border-bottom: none; }

/* ── landmarks json dump ── */
.json-panel {
  width: 100%; max-width: 860px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.json-panel pre {
  padding: 14px 16px;
  font-family: 'Fira Code', 'Cascadia Code', monospace;
  font-size: 11px; line-height: 1.6;
  color: #7dd3fc;
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── image upload panel ── */
.upload-card {
  width: 100%; max-width: 860px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.upload-area { display: block; cursor: pointer; }
.upload-placeholder {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 40px 24px; margin: 14px;
  border: 2px dashed var(--border); border-radius: 10px;
  color: var(--muted); font-size: 14px;
  transition: border-color 0.2s, color 0.2s;
}
.upload-area:hover .upload-placeholder,
.upload-area.drag-over .upload-placeholder { border-color: var(--indigo); color: #a5b4fc; }
.upload-wrap {
  position: relative; margin: 14px;
  border-radius: 10px; overflow: hidden;
  background: var(--bg); cursor: default;
}
.upload-wrap img    { display: block; width: 100%; height: auto; }
.upload-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.upload-json {
  padding: 14px 16px; border-top: 1px solid var(--border);
  font-family: 'Fira Code', 'Cascadia Code', monospace;
  font-size: 11px; line-height: 1.6; color: #7dd3fc;
  max-height: 260px; overflow-y: auto;
  white-space: pre-wrap; word-break: break-all;
}

@media (max-width: 560px) {
  .cards       { grid-template-columns: 1fr; }
  .hero-sign   { font-size: 60px; }
  .hero-row    { flex-direction: column; align-items: flex-start; gap: 12px; }
}