te;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        .header {
            background: #007bff;
            color: white;
            padding: 20px;
            text-align: center;
        }
        .header h1 {
            margin: 0;
            font-size: 2em;
        }
        .header p {
            margin: 10px 0 0 0;
            opacity: 0.9;
        }
        .user-selector {
            padding: 20px;
            bord