.btn {
    display: inline-block;
    padding: 0.4em 1em;
    font-size: 0.8em;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--rlab-radius-sm);
    cursor: pointer;
    transition: opacity 0.2s;
    color: #fff;
    background-color: var(--rlab-color-accent);
}

.btn:hover { opacity: 0.85; }

.btn-warning { background-color: var(--rlab-color-warning); color: #fff; }
.btn-danger  { background-color: var(--rlab-color-danger); color: #fff; }
.btn-success { background-color: var(--rlab-color-success); color: #fff; }