* {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body {
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
     background: #f8f9fa;
     color: #333;
     line-height: 1.6;
 }

 .banner {
     background: linear-gradient(135deg, #764ba2, #667eea);
     color: #fff;
     padding: 40px;
     text-align: center;
 }

 .footer {
     background: #222;
     color: #fff;
     text-align: center;
     padding: 20px;
     margin-top: 50px;
 }