.btn {
    padding: .5rem 1rem;
    margin-right: .25rem;
    text-align: center;
    border-radius: .25rem;
    color: inherit;
    text-decoration: inherit;
    transition: 0.3s;
}

.btn-block {
    display: block;
    width: auto;
}

.btn-sm {
    padding: .3rem .6rem;
    font-size: .8rem;
}

.btn-black {
    background-color: #222222;
    color: #ffffff;
}
.btn-black:hover {
    background-color: #333;
    color: #ffffff;
}

.btn-pink {
    background-color: #d53f8c;
}
.btn-pink:hover {
    background-color: #d62b83;
}

.btn-green {
    background-color: #38a169;
}
.btn-green:hover {
    background-color: #28a160;
}