.certificate {
    display: flex;
    margin-top: 50px;
    justify-content: space-around;
    flex-wrap: wrap;
}

.certificate .certificate-item {
    width: 350px;
}

.certificate .certificate-item-image {
    margin: 0 auto;
    background: #480862;
    border-radius: 50%;
    width: 350px;
    height: 350px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 6px 6px 10px -1px rgba(0,0,0,0.15), -6px -6px 10px -1px rgba(255,255,255,0.7)
}

.certificate .certificate-item-image-inner {
    position: relative;
    display: flex;
    border-radius: 50%;
    justify-content: center;
    align-items: center;
    width: 95%;
    height: 95%;
    box-shadow: inset 4px 4px 6px -1px rgba(0,0,0,0.2), inset -4px -4px 6px -1px rgba(255,255,255,0.7), -0.5px -0.5px 0 rgba(255,255,255, 1), 0.5px 0.5px 0 rgba(0,0,0,0.15), 0 12px 10px -10px rgba(0,0,0,0.05);
}

.certificate .certificate-item-image-inner a {
    position: absolute;
    display: block;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
}

.certificate .certificate-item-title a {
    text-align: center;
    display: block;
    width: 100%;
    margin-top: 15px;
    font-size: 18px;
    font-weight: 300;
    text-transform: uppercase;
    text-decoration: none;
    color: #480862;
}

#zertifikate .gaphalf {
    z-index: 1;
}

@media screen and (max-width: 768px) {
    .certificate .certificate-item {
        margin-bottom: 30px;
        width: 250px;
    }

    .certificate .certificate-item-image {
        width: 250px;
        height: 250px;
    }
}