:root {
            --primary: #3498db;
            --secondary: #2c3e50;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --success: #2ecc71;
            --warning: #f39c12;
            --danger: #e74c3c;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
        }
        
        body::after {
            content: "medicaexam";
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) rotate(-15deg);
            font-size: 15vw;
            font-weight: 900;
            color: rgba(52, 152, 219, 0.05);
            z-index: -1;
            pointer-events: none;
            white-space: nowrap;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0,0,0,0.1);
            position: relative;
            z-index: 1;
        }
        
        h1 {
            color: var(--secondary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
        }
        
        h2 {
            color: var(--primary);
            margin: 25px 0 15px;
        }
        
        h3 {
            color: var(--accent);
            margin: 20px 0 10px;
        }
        
        p {
            margin-bottom: 15px;
        }
        
        ul, ol {
            margin-bottom: 20px;
            padding-left: 20px;
        }
        
        li {
            margin-bottom: 8px;
            position: relative;
        }
        
        .warning-box {
            background-color: rgba(231, 76, 60, 0.1);
            border-left: 4px solid var(--danger);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 4px 4px 0;
        }
        
        .warning-box h4 {
            color: var(--danger);
            margin-bottom: 10px;
        }
        
        .info-box {
            background-color: rgba(52, 152, 219, 0.1);
            border-left: 4px solid var(--primary);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 4px 4px 0;
        }
        
        .info-box h4 {
            color: var(--primary);
            margin-bottom: 10px;
        }
        
        .anatomy-box {
            background-color: rgba(46, 204, 113, 0.1);
            border-left: 4px solid var(--success);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 4px 4px 0;
        }
        
        .anatomy-box h4 {
            color: var(--success);
            margin-bottom: 10px;
        }
        
        .image-placeholder {
            background-color: #f0f0f0;
            border: 1px dashed #ccc;
            padding: 30px;
            text-align: center;
            margin: 20px 0;
            border-radius: 5px;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        
        th, td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        
        th {
            background-color: var(--primary);
            color: white;
        }
        
        tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }
            
            body::after {
                font-size: 20vw;
                opacity: 0.03;
            }
        }