/* hotspot */
.img-container {
    position: relative;
    display: inline-block;
}
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}
.hotspot {
    position: absolute;
    cursor: pointer;
    /* ↓ホットスポット位置調整用色付け */
    /* border: 1px dashed red; */
    /* background-color: rgba(255, 0, 0, 0.2); */
}
.hotspot:hover{
    transform: translateY(-0.5rem) scale(1.1);
    transition: all 0.5s 0s ease;
    box-shadow: 0px 0px 30px rgba(0, 0, 0, 0.5);
}
.hotspot::after {
    content: "クリックで詳細を表示";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 5px;
    border-radius: 3px;
    font-size: 0.8em;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.hotspot:hover::after {
    opacity: 1;
}
/* about popup */
.aboutpop {
    display: none;
    position: fixed;
    top: 5%;
    left: 50%;
    transform: translateX(-50%);
    background-color: white;
    padding: 10px;
    border: 2px solid #7d7d7d;
    z-index: 1000;
    white-space: normal;
    width: 80%;
    max-width: 600px;
    max-height: 80%;
    overflow: auto;
}
.aboutpop img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}
.aboutpop.active {
    display: block;
}

/* staff */
.staff {
    padding: 5%;
    border: 2px solid #142164;
}
.staff img{
    float: left;
    margin-right: 10px;
    border: 5px solid white;
}

/* supplement */
.supplement {
    font-size: 0.8rem;
    color: #7d7d7d;
    margin: 3px 30px 30px;
}
.supplement ul {
    list-style-type: square;
}

/* 参考文献 */
.literature {
    max-width: 90%;
    list-style-type: square;
    margin: 0 auto;
}
.literature li {
    margin-bottom: 10px;
}
@media screen and (max-width: 1000px) {
    .literature {
        max-width: 80%;
    }
}