body {
    width: 100%;
    min-width: 1000px;
    margin: 0;
    padding: 0;
    font-family: 'Kosugi Maru', sans-serif;

    background: url(back.png), -webkit-gradient(linear, left top, left bottom, color-stop(1.00, #ffffff), color-stop(770px, #ffffff), color-stop(0.00, #99E5FF));
    background: url(back.png), -webkit-linear-gradient(top, #99E5FF 0%, #ffffff 770px, #ffffff 100%);
    background: url(back.png), -moz-linear-gradient(top, #99E5FF 0%, #ffffff 770px, #ffffff 100%);
    background: url(back.png), -o-linear-gradient(top, #99E5FF 0%, #ffffff 770px, #ffffff 100%);
    background: url(back.png), -ms-linear-gradient(top, #99E5FF 0%, #ffffff 770px, #ffffff 100%);
    background: url(back.png), linear-gradient(top, #99E5FF 0%, #ffffff 770px, #ffffff 100%);
    background-repeat:repeat-x;
    /*background-repeat: no-repeat, no-repeat;*/
    background-position: center 20px, center top;
}

a {
    color: #0089ff;
}

a:hover {
    opacity: .5;
    transition: .5s;
    text-decoration: none;
}

.header_readtext {
    text-align-last: center;
    font-size: 0.8em;
}

main {
    /* width: 100%; */
    width: 900px;
    margin: auto auto;
}
main img{
    max-width: 100%;
}

.footer_copyright {
    display: flex;
    justify-content: space-around;
    background-color: #91A80C;
    font-size: 0.8em;
    color: white;
    padding: 1em;
}

.footer_copyright_links ul {
    display: flex;
    justify-content: space-around;
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer_copyright_links ul li {
    margin-right: 6px;
    padding-left: 10px;
}
.footer_copyright_links ul li a{
    color: white;
    text-decoration: none;
}

.footer_copyright_links ul li + li {
    border-left: 1px solid #FFF;
}

/* ********** */

.header_navi{
    width: 900px;
    margin: auto auto;
}
.header_navi ul{
    display: flex;
    justify-content: space-between;
    list-style: none;
}
.header_navi ul li{
    display: grid;
    align-items: center;
    font-size: 1.2em;
    text-align: center;
    border-radius: 5px;
    background-color: white;
    padding: .5em;
    height: 2em;
}
.header_navi ul a{
    display: block;
    color: #333333;
    text-decoration: none;
}
.header_navi ul li dl{
    display: flex;
    margin-left: 0;
    padding-left: 0;
    font-size: 0.6em;
}
.header_navi ul li dl dd{
    border:none;
    list-style: none;
    padding: 0;
    margin: auto 0.2em;
}
.header_navi ul li dl dd a{
    padding: 1px;
}


.header_navi ul a:nth-child(1){
    color: #ed7d31;
    border-top:solid 2px #ff8636;
    border-left:solid 2px #ff8636;
    border-right:solid 2px #d46f2c;
    border-bottom:solid 2px #d46f2c;
    border-radius: 5px;
}
.header_navi ul li:nth-child(2){
    color: #70ad47;
    border-top:solid 2px #80c752;
    border-left:solid 2px #80c752;
    border-right:solid 2px #60943d;
    border-bottom:solid 2px #60943d;
    line-height: 60%;
    line-height: 60%;
}
.header_navi ul a:nth-child(3){
    color: #ffc000;
    border-top:solid 2px #e5ac00;
    border-left:solid 2px #e5ac00;
    border-right:solid 2px #cc9900;
    border-bottom:solid 2px #cc9900;
    border-radius: 5px;
}
.header_navi ul a:nth-child(4){
    color: #4472c4;
    border-top:solid 2px #4e83de;
    border-left:solid 2px #4e83de;
    border-right:solid 2px #3c65ab;
    border-bottom:solid 2px #3c65ab;
    border-radius: 5px;
}

.nav_fb a{
    border:none!important;
    background-color: rgb(65, 105, 225);
    border-radius: 3px;
    color: white!important;
    padding: 3px!important;
}
.nav_inst a{
    border:none!important;
    background-color: #d8179d;
    border-radius: 3px;
    color: white!important;
    padding: 3px!important;
}