#nav li{
    display: inline-block;
}
#maegaki{
    margin: auto;
    width: 90%;
}

table td{
    padding: 2px 10px;
    font-size: 12px;
}
table tr:hover{
    font-weight: bold;
    background-color: aliceblue;
}

#volcano_tbl tr td:nth-of-type(1){
    text-align: center;
}
#volcano_tbl tr td:nth-of-type(2){
    cursor: pointer;
}
#volcano_tbl tr td:nth-of-type(6),
#hyakumeizan_tbl td:nth-of-type(6){
    text-align: right;
}
#volcano_tbl td,
#hyakumeizan_tbl td{
cursor: pointer;
}
#table_area{
    width:90%;
    margin: auto;
    display: flex;
}
#elev_area{
    display: grid;
    grid-template-columns: 400px 400px;
    grid-template-rows: 350px;
    /* gap: 10px; */
    margin-left: 120px;
}

#table1_area,#table2_area,#table3_area,#table5_area{
    height: 450px;
    overflow-y: scroll;
}
#world_volcano{
    display: grid;
    grid-template-columns: 50% 45%;
    grid-template-rows: 30px 450px;
    gap: 20px;
}
#return_btn_area{
    position: relative;
    left: 80px;
    top:50px;
    z-index: 10000;
}
#return_tbl_area{
    position: relative;
    left: 80px;
    top:60px;
    z-index: 10000;
}

#return_btn,#return_tbl{
    background-color: aquamarine;
    border-radius: 10px;
    font-size: 1.1em;
    cursor: pointer;
}
.setsumei{
    margin: 5px 100px;
}
.menutitle{
    color:darkblue;
    font-size: 1.2em;
}
#pic{
    float: left;
}
.blueb{
    background-color: blue;
    color:white;
}
#clear,button{
    cursor: pointer;
}
#clear{
    border:solid 1px darkblue;
    border-radius: 5px;
    font-size: small;
    padding: 2px 4px;
}