.photo-holder {
    position: relative;
    margin: auto;
    display: flow-root;
    width: calc(90% - mod(90%, 400px));
}

.photo-h {
    overflow: hidden;
    position: relative;
    background-color: rgb(39, 48, 67);
    box-shadow: 0px 5px 5px 0 rgba(0,0,0,0.5);
    margin: 20px;
    float: left;
    height: 240px;
    width: 360px;
    border-radius: 10px;
    filter: brightness(0.7);
}

.photo-v {
    overflow: hidden;
    position: relative;
    background-color: rgb(39, 48, 67);
    box-shadow: 0px 5px 5px 0 rgba(0,0,0,0.5);
    margin: 20px;
    float: left;
    height: 240px;
    width: 160px;
    border-radius: 10px;
    filter: brightness(0.7);
}