:root{--primary-color:#007bff;--secondary-color:#6c757d;--success-color:#28a745;--danger-color:#dc3545;--warning-color:#ffc107;--info-color:#17a2b8;--light-color:#f8f9fa;--dark-color:#343a40}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--dark-color);background-color:var(--light-color)}.container{max-width:1200px;margin:0 auto;padding:0 20px}h1,h2,h3,h4,h5,h6{margin-bottom:1rem;font-weight:600}.btn{display:inline-block;padding:.75rem 1.5rem;border:none;border-radius:.375rem;text-decoration:none;text-align:center;cursor:pointer;transition:all .3s ease}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:#0056b3}.form-group{margin-bottom:1rem}.form-control{width:100%;padding:.75rem;border:1px solid #ced4da;border-radius:.375rem;font-size:1rem}.form-control:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 .2rem rgba(0,123,255,.25)}@media (max-width:768px){.container{padding:0 15px}.btn{width:100%;margin-bottom:.5rem}}