/* Detector de Baches — estilos mobile-first, dark theme por defecto. */

:root {
  --bg: #0f1115;
  --bg-elevated: #1a1d24;
  --border: #2a2e37;
  --text: #e8eaed;
  --text-muted: #9aa0ab;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #f97316;
  --danger: #ef4444;

  --class-0: #3b82f6;
  --class-1: #22c55e;
  --class-2: #f97316;
  --class-3: #ef4444;

  --radius: 10px;
  --gap: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}

.hidden {
  display: none !important;
}

/* --- Header --- */
.app-header {
  padding: 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.app-header h1 {
  margin: 0 0 4px;
  font-size: 1.25rem;
}

.app-header p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Status bar --- */
.status-bar {
  padding: 10px 16px;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.status-loading {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent);
}

.status-ready {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.status-error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: currentColor;
  transition: width 0.2s ease;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  border-bottom: 3px solid transparent;
  cursor: pointer;
}

.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.tab-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- View / canvas area --- */
.view-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap);
  padding: var(--gap);
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: 640px;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

#camera-video {
  display: none; /* solo se usa como fuente; el canvas es lo visible */
}

#camera-canvas,
#upload-canvas {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.placeholder-message {
  position: absolute;
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.fps-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.6);
  color: var(--text);
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-variant-numeric: tabular-nums;
}

.error-message {
  color: var(--danger);
  font-size: 0.9rem;
  text-align: center;
}

/* --- Controls --- */
.controls {
  padding: var(--gap);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.control-row label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.buttons-row {
  display: flex;
  gap: 8px;
}

.btn {
  flex: 1;
  padding: 14px 12px;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  text-align: center;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:not(:disabled):hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-elevated);
}

.btn-block {
  display: block;
  width: 100%;
}

/* --- Results panel --- */
.results-panel {
  padding: var(--gap);
  border-top: 1px solid var(--border);
}

.results-panel h2 {
  font-size: 1rem;
  margin: 0 0 8px;
}

.results-summary {
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.results-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.results-list li {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.85rem;
}

.no-detections {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* --- Footer --- */
.app-footer {
  padding: 12px 16px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.app-footer a {
  color: var(--accent);
}

/* --- Desktop --- */
@media (min-width: 768px) {
  .app-header h1 {
    font-size: 1.6rem;
  }

  main.view-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--gap);
    padding: var(--gap);
    align-items: start;
  }

  .view {
    padding: 0;
  }

  .controls {
    grid-column: 1 / -1;
    max-width: 640px;
  }

  .results-panel {
    grid-column: 2;
    grid-row: 1;
    border-top: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    align-self: start;
  }

  .buttons-row .btn {
    flex: initial;
    min-width: 140px;
  }
}

/* Light theme opcional si el usuario prefiere claro explícitamente */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #0f1115;
    --bg-elevated: #1a1d24;
    --text: #e8eaed;
    /* Se mantiene dark theme como default por requerimiento de contraste
       de cámara al aire libre, incluso si el sistema pide light. */
  }
}