.arrow-black-div {
    height: 1.5em;
    width: 1.5em;
    display: inline-flex;
    background: white;
    border-radius: 50%;
    padding: 0.25em;
    margin-left: 0.25em;
}
a.btn {
    display: inline-flex;
    align-items: center;
}
button.btn {
    display: inline-flex;
    align-items: center;
}