.btn_slide {
    cursor: pointer;
    width: 64px;
    height: 64px;
    border: 0;
}

.btn_slide:focus {
    outline: none;
}

.btn_slide img {
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    width: 33px;
    height: auto;
}