:root {
  --bg-primary: #1C1E21;
  --bg-secondary: #24262A;
  --bg-tertiary: #2E3136;
  --bg-card: #1a1a2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent-primary: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --success: #00ff88;
  --warning: #ffaa00;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  width: 600px;
  height: 600px;
  overflow: hidden;
}

#app { width: 100%; height: 100%; position: relative; }

.screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0;
  left: 0;
}
.screen.hidden { display: none; }

.header {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-secondary);
  gap: 12px;
  flex-shrink: 0;
}
.header h1 { font-size: 22px; font-weight: 600; flex: 1; }
.header-meta { font-size: 13px; color: var(--text-secondary); }

.content {
  flex: 1;
  padding: 14px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.focusable {
  transition: transform 200ms cubic-bezier(0.6, 0, 0.4, 1), box-shadow 200ms ease, background 200ms ease;
  border: 2px solid transparent;
  cursor: pointer;
  min-height: 44px;
}
.focusable:focus {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}
.focusable[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.nav-bar {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  flex-shrink: 0;
}
.nav-item {
  flex: 1;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  text-align: center;
}
.nav-item:focus { background: var(--bg-card); }
.nav-item.primary { background: var(--accent-primary); color: var(--bg-primary); }
.nav-item.primary:focus { background: #33ddff; }
.nav-item.active { background: var(--danger); color: #fff; }
.nav-item.active:focus { background: #ff6680; }

.sensor-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.sensor-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.4;
  min-height: 20px;
}
.sensor-hint { color: var(--text-muted); font-size: 13px; }
.sensor-body.error { color: var(--danger); }
.sensor-body.success { color: var(--success); }

.video-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}
#cam-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  white-space: nowrap;
}
.badge.granted { background: rgba(0, 255, 136, 0.15); color: var(--success); }
.badge.denied { background: rgba(255, 68, 102, 0.18); color: var(--danger); }
.badge.pending { background: rgba(255, 170, 0, 0.18); color: var(--warning); }
.badge.unsupported { background: rgba(96, 96, 112, 0.25); color: var(--text-secondary); }

.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  border: 1px solid var(--accent-primary);
  transition: transform 0.3s ease;
  z-index: 100;
  pointer-events: none;
  max-width: 520px;
}
.toast.visible { transform: translateX(-50%) translateY(0); }
.toast.error { border-color: var(--danger); }
.toast.success { border-color: var(--success); }

.hidden { display: none !important; }