.fill_img{
    width:100%;
    height:100%;
}

body {
    background-image: url("./image/index/background.png");
    width: 98vw;
    height: 50vw;
}

#logo_div{
    position: absolute;
    top:0vw;
    left:0vw;
    width: 60vw;
    height: 10vw;
}

#japan_div{
    position: absolute;
    top:10vw;
    left:0vw;
    width: 30vw;
    height: 40vw;
}

#area_div {
    position: absolute;
    left: 35vw;
    right: 15vw;
    top: 10vw;
    height: 25vw;
}

table{
    height: 100%;
    width: 100%;
}

.thumbnail_img{
    width: 100%;
    height: 100%;
}

.thumbnail_div:hover .thumbnail_img{
    opacity: 0.15;
}

.thumbnail_div{
    position:relative;
}

.thumbnail_tooltip {
    display: none;
    position: absolute;
    text-align: left;
    font-size: 0.8vw;
    color: #fff;
    top:1vw;
    left:1vw;
}

.thumbnail_div:hover .thumbnail_tooltip{
    display: inline-block;
}

#info_div{
    position: relative;
    cursor: pointer;
    display:  inline-block;
    left: 80vw;
    top: 38vw;
    width: 5vw;
    height: 5vw;
}

#info_tooltip {
    display: none;
    position: absolute;
    padding: 0.5vw;
    font-size: 0.8vw;
    line-height: 1.5vw;
    color: #fff;
    border-radius: 5vw;
    background: #000;
    width: 40vw;
}

#info_tooltip:before {
    content: "";
    position: absolute;
    border: 2vw solid transparent;
    border-top: 3vw solid #000;
    margin-top: 7vw;
    margin-left: 25.5vw;
}

#info_div:hover #info_tooltip{
    display: inline-block;
    top: -10vw;
    left: -30vw;
    padding-left: 5vw;
}

#copyright_div{
    position: absolute;
    left: 36vw;
    top: 36vw;
    width: 40vw;
    height: 10vw;
    text-align: left;
    font-size: 1vw;
    font-weight: bold;
}

button#experiment-start-button {
    position: relative !important;
    display: inline-block;
    padding: 0.25em 0.5em;
    text-decoration: none;
    color: #FFF;
    background: #03A9F4 !important;/*色*/
    border: solid 1px #0f9ada;/*線色*/
    border-radius: 4px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
    text-shadow: 0 1px 0 rgba(0,0,0,0.2);
}
  
button#experiment-start-button:active {
    /*押したとき*/
    border: solid 1px #03A9F4;
    box-shadow: none;
    text-shadow: none;
}