html,
body {
    height: 100%;
}
main.signin {
    max-width: 330px;
    padding: 1rem;
}
main.signin img.logo {
    width: 170px;
}
main.signin h1 {
    font-size: 1.3rem;
    margin: 0;
}
main.signin div.alert h4 {
    font-size: 1.1rem;
}
main.signin div.alert p {
    font-size: .9rem;
    margin-bottom: 0;
}
main.signin form.login-form .form-floating:focus-within {
    z-index: 2;
}
main.signin form.login-form input[type="text"] {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

main.signin form.login-form input[type="password"] {
    margin-bottom: 15px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}
main.signin form.login-form .form-floating>.form-control-plaintext~label::after,
main.signin form.login-form .form-floating>.form-control:focus~label::after,
main.signin form.login-form .form-floating>.form-control:not(:placeholder-shown)~label::after,
main.signin form.login-form .form-floating>.form-select~label::after {
    background-color: transparent;
}
main.signin form.login-form.form-floating > .form-control::placeholder {
    color: revert;
    opacity: .4;
}
main.signin form.login-form .form-floating > .form-control:not(:focus)::placeholder {
    color: transparent;
}
main.signin form.login-form button#login-submit {
    background-color: #4588cc;
    border-color: #4588cc;
}
main.signin form.login-form button#login-submit:hover {
    background-color: #3876b5;
    border-color: #3876b5;
}