body { margin: 0; overflow: hidden; background-color: #000; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        canvas { display: block; }
        #ui {
            position: absolute;
            top: 20px;
            left: 20px;
            color: rgba(255, 255, 255, 0.8);
            pointer-events: none;
            user-select: none;
            z-index: 10;
        }
        h1 { margin: 0; font-size: 24px; font-weight: 300; letter-spacing: 2px; }
        p { margin: 5px 0 0 0; font-size: 14px; opacity: 0.7; }
        .legend { margin-top: 10px; font-size: 12px; }
        .legend span { display: inline-block; width: 10px; height: 10px; margin-right: 5px; border-radius: 50%; }

        /* Camera Preview Styles */
        #camera-container {
            position: absolute;
            bottom: 20px;
            right: 20px;
            width: 240px;
            height: 180px;
            background: rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 8px;
            overflow: hidden;
            z-index: 20;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .input_video { display: none; }
        .output_canvas { width: 100%; height: 100%; transform: scaleX(-1); /* Mirror effect */ }
        .loading-text { position: absolute; color: white; font-size: 12px; }
        .controls-hint {
            position: absolute;
            bottom: 5px;
            width: 100%;
            text-align: center;
            color: rgba(255,255,255,0.9);
            font-size: 10px;
            background: rgba(0,0,0,0.6);
            padding: 2px 0;
            pointer-events: none;
        }