Add a margin between email input and subscribe button (Gumroad)

follow-user-button-input.css

.follow-user-form button {
    transition: border-radius 1.5s cubic-bezier(.23,1.5,.32,1);
    box-shadow: none;
    margin-left: 15px;
    border-radius: 5px;
    display: inline-block;
    position: relative;
    height: 50px;
    min-width: 50px;
    vertical-align: top;
}

.follow-user-form input[type=email] {
    transition: width .3s cubic-bezier(.23,1.5,.32,1),padding .3s cubic-bezier(.23,1.5,.32,1),opacity .3s cubic-bezier(.23,1.5,.32,1);
    box-sizing: border-box;
    padding: 15px;
    border-radius: 5px;
    display: inline-block;
    height: 50px;
    border: 1px solid #DADADA;
}