:root{--primary-color: #007BFF;--success-color: #28A745;--warning-color: #FD7E14;--danger-color: #DC3545;--gray-color: #6C757D;--light-gray: #F8F9FA;--hover-blue: #E9F5FF}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background-color:#fff;color:#000;line-height:1.6}button{cursor:pointer;border:none;border-radius:5px;padding:8px 16px;font-size:14px;transition:background-color .2s}select{padding:8px;border:1px solid #ddd;border-radius:5px;background-color:#fff;font-size:14px}code{font-family:Courier New,Courier,monospace}