body{background-color:#f8f9fa}.form-container{max-width:400px;margin:50px auto;background:#fff;padding:30px;border-radius:10px;box-shadow:0 4px 10px rgba(0,0,0,.1)}.form-container h1{text-align:center;margin-bottom:20px}.btn-custom{width:100%;transition:.3s}.btn-custom:active{transform:scale(.98)}.btn-facebook{background-color:#1877f2;color:#fff;font-size:16px;width:100%;padding:10px;border-radius:5px;border:none;transition:.3s}.btn-facebook:hover{background-color:#125ec4}.btn-facebook i{margin-right:8px}