button {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    font-size: 20px;
    border-radius: 3px;
    margin-left: 5px;
    color: white;
}

    button:not(.disabled):hover {
        background-color: rgba(255,255,255,0.3);
    }

    button:not(.disabled):active {
        background-color: transparent;
    }

    button.disabled > span.mdi {
        color: rgba(255,255,255,0.3) !important;
    }

    button.large {
        width: 32px;
        height: 32px;
        font-size: 28px;
        border-radius: 6px;
    }