@charset "UTF-8";
html{
    font-size: 20px; 
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    line-height: 1.7;
    background-color: white;
}

h1{
    color:blue;
    text-align: center;
    font-size: 2rem; 
    line-height: 1;
}

nav{
    text-align: center;
}
nav ul{
    display: table;
    margin: 0 auto 5px;
    padding: 0;
    width: 85vw;
    text-align: center;
}
nav li{
    display: table-cell;
    min-width: 50px;
}
nav li:not(:last-child){
    border-right:2px solid #ddd;
}
nav a{
    display: block;
    width: 100%;
    text-decoration: none;
    color: #555;
}
nav a:hover{
    color: blue;
}

div{
    margin:0 auto 60px;
    width: 90%;
}
div a:hover{
    color:blue;
}

h2{
    font-size: 1.5rem;
    line-height: 1;
    color: blue;
}

h3{
    font-size: 1.3rem;
    line-height: 1;
}

dt{
    color:blue;
    font-weight: 600;
}

#whatsnew dt{
    font-weight:normal;
}
/*
    dtやdlの調整
*/

#return{
    text-align: center;
    line-height: 1;
}

#announce{
    text-align: center;
    font-weight:bold;
    font-size:1.7rem;
    color:rgb(234, 72, 14);
}