.button-arrow {
    width: 50px;
    height: 50px;
    background-color: #828282;
    box-shadow: 5px 5px 0 #000;
    cursor: pointer;
    border: none;
}

.button-arrow.-right::before {
    content: "";
    display: block;
    width: 0;
    height: 0;
    border: 18px solid transparent;
    border-left: 34px solid #7209B7;
    transform: translateX(3px);
}

.button-arrow.-left::before {
    content: "";
    display: block;
    width: 0;
    height: 0;
    border: 18px solid transparent;
    border-right: 34px solid #7209B7;
    transform: translateX(-17px);
}

.button-arrow .content {
    display: none;
}