ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#option_panel {
    display: block;
    position: fixed;
    background: #22415e;
    width: 200px;
    height: 100%;
    left: 0;
    top: 50px;
    color: #FFF;
}

#option_panel h1 {
    line-height: 25px;
    padding-left: 20px;
    font-size: 30px;
}

#option_panel li {
    margin-left: 20px;
    margin-right: 20px;
    line-height: 25px;
    text-align: left;
}

#option_panel > hr {
    margin-left: 20px;
    margin-right: 20px;
    background: #FFF;
    border-color: #FFF;
}

#option_panel li:hover {
    background: #bbb;
}
/*#region display panel*/
#display_panel {
    width: 80vw;
    margin-left: 200px;
    display: block;
}
#display_panel hr{
    width: 100%;
    margin: 0;
    background: #000;
    border-color: #000;
}
.sec_container{
    width: inherit;
}
.sec_container > h1{
    line-height: 0px;
    font-size: 2vw;
    font-weight: 600;
}
.item{
    float: left;
    width: 24.5vw;
    height: 24.5vw;
    padding: 1vw;
    overflow: hidden;
}
.item_img{
    object-fit: cover;
    width: auto;
    height: 100%;
}
.item_name{
    font-size: 1.5vw;
    line-height: 0;
    padding: 0.5vw;
}
/*#end region */

/*#region zoomed image*/
#zoomed_container{
    width: 100%;
    height: 100%;
    z-index: 1;
    position: fixed;
    top: 0;
    background-color: rgba(0,0,0,0.5);
    display: none;
}
#zoomed_image{
    position: fixed;
    width: 90vw;
    height: 90vh;
    top: 50px;
    left: 4.5vw;
    background-color: #22415e;
    border-radius: 10px;
    z-index: 3;
}
#zoomed_image button{
    position: absolute;
    width: 50px;
    height: 50px;
    right: 1vw;
    top: 1vw;
    z-index: 2;
    background-color: rgba(255,255,255,1);
    border-radius: 10px;
    border-color: #22415e;
}
#zoomed_image img{
    object-fit: contain;
    width: 98%;
    height: 96%;
    border-radius: 10px;
    background: white;
    margin: 1%;
}
/*#end region */