.login-heading > span {
    margin-bottom: 18px;
    font-size: 17px;
    letter-spacing: .24em;
}

.login-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 13px;
}

.login-submit span {
    font-size: 19px;
    line-height: 1;
}

.back-link span {
    display: inline-block;
    margin-right: 5px;
    font-size: 15px;
}

@media (max-width: 600px) {
    .login-heading > span { font-size: 15px; }
}