.clients-style-1 .sigma_client {
    border: 1px solid #efefef;
    background-color: #fff;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    transition: .3s;
}
.clients-style-1 .sigma_client.trans-bg {
    background: transparent;
    border-color: #2d2d2d;
}