body {
            margin: 0;
            padding: 20px;
            background: linear-gradient(135deg, #0a0a0a, #1a1a2e, #16213e);
            color: white;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow-x: hidden;
        }
        canvas {
            display: block;
            margin: 20px auto;
            border: 3px solid #00ffff;
            background: #000;
            border-radius: 10px;
            box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
        }
        .controls {
            text-align: center;
            margin-top: 20px;
            background: rgba(0, 0, 0, 0.7);
            padding: 20px;
            border-radius: 15px;
            border: 1px solid #333;
        }
        .controls label {
            display: inline-block;
            margin: 0 15px;
            padding: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            transition: all 0.3s ease;
        }
        .controls label:hover {
            background: rgba(0, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .controls input, .controls select {
            margin: 0 8px;
            padding: 5px;
            border-radius: 5px;
            border: 1px solid #555;
            background: #222;
            color: white;
        }
        h1 {
            text-align: center;
            color: #00ffff;
            text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
            font-size: 2.5em;
            margin-bottom: 10px;
        }
        .subtitle {
            text-align: center;
            color: #888;
            font-size: 1.2em;
            margin-bottom: 20px;
        }
        #metrics {
        position: absolute;
        top: 10px;
        left: 10px;
        background: rgba(0, 0, 0, 0.9);
        color: #00ff00;
        padding: 15px;
        border-radius: 10px;
        font-family: 'Courier New', monospace;
        font-size: 14px;
        border: 2px solid #00ff00;
        box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
        min-width: 250px;
        }
        #metrics .fps-value {
        font-size: 20px;
        font-weight: bold;
        color: #00ffff;
        }
        #metrics .warning {
        color: #ff6600;
        font-weight: bold;
        }
        #metrics .critical {
        color: #ff0000;
        font-weight: bold;
        animation: blink 1s infinite;
        }
        @keyframes blink {
            0%, 50% { opacity: 1; }
            51%, 100% { opacity: 0.3; }
        }
        .benchmark-info {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(0, 0, 0, 0.9);
            color: #ffff00;
            padding: 15px;
            border-radius: 10px;
            font-family: 'Courier New', monospace;
            font-size: 12px;
            border: 2px solid #ffff00;
            box-shadow: 0 0 20px rgba(255, 255, 0, 0.3);
            max-width: 300px;
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }

        /* === DIÁLOGO DE AVISO === */
        .warning-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.95);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 10000;
            animation: fadeIn 0.5s ease-out;
        }

        .warning-dialog {
            background: linear-gradient(135deg, #1a1a1a, #2d1b69, #8b0000);
            border: 3px solid #ff6b6b;
            border-radius: 15px;
            padding: 30px;
            max-width: 600px;
            text-align: center;
            box-shadow: 0 0 50px rgba(255, 107, 107, 0.5);
            animation: slideIn 0.6s ease-out;
        }

        .warning-title {
            font-size: 2.2em;
            color: #ff6b6b;
            margin-bottom: 20px;
            text-shadow: 0 0 10px rgba(255, 107, 107, 0.8);
            animation: pulse 2s infinite;
        }

        .warning-content {
            font-size: 1.1em;
            line-height: 1.6;
            margin-bottom: 25px;
            color: #ffffff;
        }

        .warning-list {
            text-align: left;
            background: rgba(0, 0, 0, 0.3);
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            border-left: 4px solid #ff6b6b;
        }

        .warning-list li {
            margin: 8px 0;
            color: #ffdddd;
        }

        .warning-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            margin-top: 25px;
        }

        .btn-safe, .btn-proceed {
            padding: 12px 25px;
            border: none;
            border-radius: 8px;
            font-size: 1.1em;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 140px;
        }

        .btn-safe {
            background: linear-gradient(135deg, #28a745, #20c997);
            color: white;
            box-shadow: 0 4px 15px rgba(40, 167, 69, 0.4);
        }

        .btn-safe:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40, 167, 69, 0.6);
        }

        .btn-proceed {
            background: linear-gradient(135deg, #dc3545, #fd7e14);
            color: white;
            box-shadow: 0 4px 15px rgba(220, 53, 69, 0.4);
        }

        .btn-proceed:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(220, 53, 69, 0.6);
        }

        .checkbox-container {
            margin: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .checkbox-container input[type="checkbox"] {
            width: 18px;
            height: 18px;
            accent-color: #ff6b6b;
        }

        .checkbox-container label {
            color: #ffdddd;
            font-size: 0.95em;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-50px) scale(0.9);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        /* Ocultar conteúdo principal inicialmente */
        .main-content {
            display: none;
        }

        .main-content.visible {
            display: block;
        }