body {
    /*background-color: #ffffff;*/
    background-color: #aebeb5;
    font-family: 'Meiryo', 'Hiragino Sans';
}
h1 {
    border-bottom: 3px solid #bbf1ef;
    box-sizing: border-box;
    padding: 1% 0;
    margin: 3% auto;
    width: 90%;
    text-align: center;
}

header{
    text-align: center;
    width: 100%;
    position: fixed;
    padding: 0px 20px;
    justify-content: space-between;
    background-color: rgb(44, 44, 44);
}
header nav ul{
    
    display: flex;
    /*flex-wrap: wrap;*/
    align-items: center;
    list-style: none;
    font-size: larger;
    font-weight: bold;
    text-align: center;
}
header nav ul li{
    
    margin-left: 30px;
}
header a {
    text-decoration: none;
    color: #ffffff;
}
#container {
    padding-top: 600px;
}


li.topic{
    text-decoration:underline;
    padding-top: 30px;
    /*
    background-color: rgb(105, 168, 226);
    color: #ffffff;
    padding: 0 8px;
    display: block;
    width: 35%;
    text-align: center;*/
}

table{
    width: 80%;
    border-collapse:separate;
    border-spacing: 0;
}
  
th{
    /*width: 30%;*/
    border-left:solid 1px #aaaaaa;
    border-top:solid 1px #aaaaaa;
    border-bottom:solid 1px #aaaaaa;
}
th.left1{
    width: 30%;
}
th.center{
    width: 50%;
}
th:last-child{
    /*width: 30%;*/
    border-right:solid 1px #aaaaaa;
}

td.left1{
    width: 30%;
    border-left:solid 1px #aaaaaa;
    border-bottom:solid 1px #aaaaaa;
    text-align: center;
    
}
td.center{
    width: 50%;
    border-left:solid 1px #aaaaaa;
    border-right:solid 1px #aaaaaa;
    border-bottom:solid 1px #aaaaaa;
    text-align: center;
}
details {
    width: 80%;
    align-content: center;
    margin-left: 10px;
    padding: 10px;
}
summary {
    list-style-image: url("docs/amuro3.png");
    font-family: 'Lato', 'Meiryo';
    font-size: larger;
    font-weight: bold;
    /*
    border-bottom: solid 3px #aaaaaa;
    border-right: solid 3px #aaaaaa;
    border-left: solid 3px #aaaaaa;*/
    border:solid 3px #aaaaaa;
    border-radius: 5px;
    margin-top: 20px;
    padding: 10px;
    text-align: center;
}
summary::-webkit-details-marker {
    background: url("docs/amuro3.png") no-repeat center/6px;
    color: transparent;
}
div.head {
    overflow: hidden;
}
div.box {
    
    width: 98%;
    margin: 0 auto 50px;
    display: flex;
    justify-content: space-between;
}
main {
    flex-basis: 66%;
    background-color: #ffffff;
    padding: 10px 20px;
    border-radius: 10px;
}
aside {
    flex-basis: 30%;
    background-color: bisque;
    text-align: center;
    /*align-content: center;*/
    align-content: flex-start; /* 上寄せ */
    padding: 40px 20px; 
    border-radius: 10px;
}
.scroll-box {
    width: 90%;
    height: 150px;
    margin: 0 auto 50px;
    overflow: scroll;
    background: #ffffff;
}
/*
summary {
    padding-left: 1px 0 2px 23px;
    background: transparent url("../image/amuro.png") no-repeat left 0.1em;
}*/