@keyframes spinner-border-animation {
    to {
        transform: rotate(360deg);
    }
}

.spinner-border {
    animation: spinner-border-animation 0.75s linear infinite;
}

@media (max-width: 480px) {
    .login-box {
        padding: 2rem 1.5rem;
        max-width: 100%;
    }

    .login-box h1 {
        font-size: 1.5rem;
    }

    .form-control,
    .form-control-lg {
        padding: 0.75rem 0.875rem;
        font-size: 16px;
    }
}