:root {
  --bg: #0f1220;
  --panel: #171b2e;
  --panel-alt: #1f2440;
  --border: #2b2f4a;
  --text: #eef0fb;
  --text-dim: #9aa1c4;
  --accent: #6c8cff;
  --accent-hover: #8aa4ff;
  --positive: #3ddc97;
  --negative: #ff6b6b;
  --neutral: #ffd166;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

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

.app-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  font-size: 2rem;
  line-height: 1;
}

.brand h1 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 2px 0 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.mode-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 20px 0;
}

.tab-btn {
  flex: 1;
  max-width: 220px;
  padding: 10px 16px;
  background: var(--panel);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

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

.app-main {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.9fr);
  gap: 20px;
  padding: 0 20px 20px;
  align-items: start;
}

.stage-panel {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 0 var(--radius) var(--radius) var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.mode-section {
  display: none;
}

.mode-section.active {
  display: block;
}

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

#video, #upload-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000;
}

.media-frame canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.media-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.95rem;
  text-align: center;
  padding: 20px;
  pointer-events: none;
}

.media-placeholder.hidden {
  display: none;
}

.badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.65);
  color: var(--text);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  appearance: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #0b0d18;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
}

.btn-icon {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 11px 14px;
  font-size: 1.1rem;
}

.switch-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-left: auto;
}

.switch-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.status-line {
  min-height: 1.2em;
  margin: 10px 2px 0;
  color: var(--negative);
  font-size: 0.85rem;
}

.results-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 16px;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.results-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.results-count {
  background: var(--accent);
  color: #0b0d18;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 3px 10px;
  border-radius: 999px;
}

.results-meta {
  color: var(--text-dim);
  font-size: 0.78rem;
  margin: 6px 0 14px;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 70vh;
  overflow-y: auto;
}

.empty-state {
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.5;
}

.face-card {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--face-color, var(--accent));
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.face-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  margin-bottom: 8px;
}

.face-card-title .swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--face-color, var(--accent));
}

.face-attrs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
  font-size: 0.85rem;
}

.face-attrs dt {
  color: var(--text-dim);
  grid-column: 1;
}

.face-attrs dd {
  margin: 0;
  grid-column: 2;
  text-align: right;
  font-weight: 600;
}

.mood-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.mood-Positive {
  background: rgba(61, 220, 151, 0.15);
  color: var(--positive);
}

.mood-Negative {
  background: rgba(255, 107, 107, 0.15);
  color: var(--negative);
}

.mood-Neutral {
  background: rgba(255, 209, 102, 0.15);
  color: var(--neutral);
}

.app-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-dim);
  font-size: 0.78rem;
}

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

/* ---------- Mobile / responsive ---------- */
@media (max-width: 860px) {
  .app-main {
    grid-template-columns: 1fr;
  }

  .results-panel {
    position: static;
  }

  .results-list {
    max-height: none;
  }
}

@media (max-width: 480px) {
  .app-header {
    padding: 12px 14px;
  }

  .mode-tabs {
    padding: 10px 14px 0;
  }

  .tab-btn {
    max-width: none;
    font-size: 0.82rem;
    padding: 10px 8px;
  }

  .app-main {
    padding: 0 14px 14px;
    gap: 14px;
  }

  .stage-panel, .results-panel {
    padding: 12px;
  }

  .controls {
    gap: 8px;
  }

  .btn, .btn-icon {
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  .switch-label {
    margin-left: 0;
    width: 100%;
    order: 10;
  }

  .face-attrs {
    grid-template-columns: 1fr 1fr;
  }
}