:root {
            --neon-blue: #00d4ff;
            --neon-green: #00ff00;
            --dark-bg: #0b0b0c;
        }

        body {
            background-color: #050505;
            color: white;
            font-family: 'Segoe UI', sans-serif;
            margin: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            overflow-x: hidden;
        }

        .status-bar {
            width: 100%;
            background: #000;
            padding: 10px 0;
            display: flex;
            justify-content: center;
            gap: 30px;
            font-size: 12px;
            border-bottom: 1px solid #1a1a1a;
        }

        .main-container {
            max-width: 1000px;
            width: 90%;
            margin-top: 50px;
            text-align: center;
        }

        .artery-display {
            background: var(--dark-bg);
            border: 2px solid #1a1a1a;
            border-radius: 15px;
            padding: 20px;
            position: relative;
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
        }

        #lipidCanvas {
            width: 100%;
            height: 200px;
            border-radius: 10px;
            background: #050505;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .stat-card {
            background: #0a0a0a;
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid var(--neon-blue);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .stat-value {
            font-size: 32px;
            font-family: 'Courier New', monospace;
            color: var(--neon-blue);
        }

        .label { font-size: 12px; color: #666; text-transform: uppercase; }

        .btn-voltar {
            margin-top: 40px;
            display: inline-block;
            color: #666;
            text-decoration: none;
        }

        /* Modal */
        #diag-modal {
            display: none;
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: rgba(0,0,0,0.9);
            z-index: 9999;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(8px);
        }

        .modal-content {
            background: #0a0a0a;
            border: 2px solid var(--neon-blue);
            padding: 30px;
            border-radius: 15px;
            max-width: 400px;
            text-align: center;
            box-shadow: 0 0 30px var(--neon-blue);
        }

       /* Definição das variáveis de cor Core */
/* Botão Estilo Monitoramento Cardíaco (Conforme Imagem) */
.btn-voltar-principal {
    display: inline-block;
    margin-top: 50px;
    padding: 18px 60px; /* Mais robusto como na imagem */
    background-color: #ff0000; /* Vermelho sólido vibrante */
    color: #000; /* Texto preto para contraste forte */
    text-decoration: none;
    font-weight: 900;
    font-size: 14px;
    border: none;
    border-radius: 8px; /* Cantos levemente arredondados, não pílula */
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.4s ease;
    cursor: pointer;
    /* Brilho externo constante (Glow) */
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.6), 0 0 40px rgba(255, 0, 0, 0.4);
}

/* Efeito de Intensificação no Hover */
.btn-voltar-principal:hover {
    transform: translateY(-3px) scale(1.02);
    background-color: #ff3333; /* Fica levemente mais claro */
    /* Pulsação de brilho mais intensa */
    animation: pulse-red-glow 1.5s infinite;
}

/* Pulsação de Brilho (Glow Dinâmico) */
@keyframes pulse-red-glow {
    0% {
        box-shadow: 0 0 20px rgba(255, 0, 0, 0.6), 0 0 40px rgba(255, 0, 0, 0.4);
    }
    50% {
        box-shadow: 0 0 35px rgba(255, 0, 0, 0.9), 0 0 60px rgba(255, 0, 0, 0.7);
    }
    100% {
        box-shadow: 0 0 20px rgba(255, 0, 0, 0.6), 0 0 40px rgba(255, 0, 0, 0.4);
    }
}