body {
            background-color: #f5f7f9;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            margin-top: 20px;
            margin-bottom: 20px;
        }
header {
			    background: linear-gradient(135deg, #2c3e50, #4a6572);
			    color: white;
			    padding: 5px;
			    text-align: center;
				font-size:25px;
			}
			
			.tabs {
			    display: flex;
			    background: #e8ebf0;
			    border-bottom: 1px solid #d1d9e6;
			}
			
			.tab-btn {
			    flex: 1;
			    padding: 15px;
			    text-align: center;
			    background: #e8ebf0;
			    border: none;
			    cursor: pointer;
			    font-size: 16px;
			    font-weight: 500;
			    transition: all 0.3s;
			    border-bottom: 3px solid transparent;
			    text-decoration: none;
			    color: #333;
			}
			
			.tab-btn:hover {
			    background: #dbe0e8;
			}
			
			.tab-btn.active {
			    background: white;
			    border-bottom: 3px solid #0d6efd;
			    color: #0d6efd;
			}
			footer {
			    text-align: center;
			    padding: 20px;
			    color: #6c757d;
			    font-size: 14px;
			    border-top: 1px solid #d1d9e6;
			    margin-top: 20px;
			}