*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.container{max-width:1200px;margin:0 auto;padding:2rem}.btn{padding:.75rem 1.5rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem;font-weight:500;transition:background-color .3s}.btn.btn-primary{background-color:#007bff;color:#fff}.btn.btn-primary:hover{background-color:#0056b3}.btn.btn-success{background-color:#28a745;color:#fff}.btn.btn-success:hover{background-color:#218838}.btn.btn-danger{background-color:#dc3545;color:#fff}.btn.btn-danger:hover{background-color:#c82333}.btn:disabled{opacity:.6;cursor:not-allowed}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:700}.form-group input{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.form-group input:focus{outline:none;border-color:#007bff}.alert{padding:1rem;border-radius:4px;margin-bottom:1rem}.alert.alert-error{background-color:#fee;border:1px solid #fcc;color:#c33}.alert.alert-success{background-color:#efe;border:1px solid #cfc;color:#3c3}.card{background:#fff;border-radius:8px;padding:1.5rem;box-shadow:0 2px 4px #0000001a;margin-bottom:1rem}