body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5;margin:0;padding:0}.container{max-width:1200px;margin:0 auto;padding:0 20px}.header{background-color:#fff;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:20px 0}.main{padding:40px 0}.card{background-color:#fff;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:20px;margin-bottom:20px}.button{display:inline-block;background-color:#0070f3;color:#fff;border:none;border-radius:4px;padding:10px 20px;font-size:16px;cursor:pointer;text-decoration:none;margin-right:10px}.button:hover{background-color:#0051a2}.button-secondary{background-color:#666}.button-secondary:hover{background-color:#444}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:5px;font-weight:500}.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;font-size:16px}.alert{padding:15px;border-radius:4px;margin-bottom:20px}.alert-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-error{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.alert-warning{background-color:#fff3cd;color:#856404;border:1px solid #ffeeba}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}@media (max-width:768px){.grid{grid-template-columns:1fr}}