.circle013{
    border: 25px solid var(--o-color-2);
    display: inline-block;
    border-radius: 50%;
    margin-bottom: 30px;
    background: var(--o-color-2);
}
.a_snippet_013{
    transition: 650ms;
}
.btn013{
    opacity: 0;
    transition: 650ms;
    transform: rotateX(90deg);
}
.o_box_013:hover .a_snippet_013{
    transform: rotateY(180deg);
}
.o_box_013:hover .btn013{
    transform: rotateY(0deg);
    opacity: 1;
}
.o_box_013:hover .header_013{
    color: var(--o-color-1);
}