*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5}a{color:inherit;text-decoration:none}button{font-family:inherit}code,pre{font-family:Courier New,Courier,monospace}.container{max-width:1200px;margin:0 auto;padding:0 20px}.card{background-color:#fff;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1);padding:20px;margin-bottom:20px}.btn{padding:10px 20px;border:none;border-radius:5px;cursor:pointer;font-size:16px;font-weight:500;transition:opacity .2s}.btn:hover:not(:disabled){opacity:.9}.btn:disabled{cursor:not-allowed;opacity:.6}.btn-primary{background-color:#007bff;color:#fff}.btn-success{background-color:#28a745;color:#fff}.btn-danger{background-color:#dc3545;color:#fff}.btn-secondary{background-color:#6c757d;color:#fff}.alert{padding:15px;border-radius:5px;margin-bottom:20px}.alert-danger{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.alert-success{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-info{background-color:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}.alert-warning{background-color:#fff3cd;color:#856404;border:1px solid #ffc107}