/* ▼SP用スタイル▼ */
body{
    padding: 0;
    margin: 0;
    background-color: #eee;
}
main{
    width: 100%;
    box-sizing: border-box;
    padding: 20px;
}
header{
    position: relative;
}
header > div{
    width: 100%;
    text-align: center;
    margin: 10px 0;
}
header > div img{
    width: 160px;
}
.btn_menu{
    position: absolute;
    top: 10px;
    right: 10px;
}
.btn_menu span{
    height: 50px;
    width: 50px;
    display: flex;
    border-radius: 50%;
    padding: 0;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    background-color: #000;
    color: #fff;
}
.nav ul{
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: #fff;
    height: 0;
    opacity: 0;
    transition: all 300ms;
}
.nav.show ul{
    height: auto;
    opacity: 1;
}
.nav ul li{
    text-align: center;
    border-bottom: solid 1px #ccc;
    padding: 0.5em 0;
    display:none;
}
.nav.show ul li{
    display: block;
}

/* ▼PC用スタイル▼ */
@media (min-width: 544px){
    header{
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 10px;
        background-color: #fff;
    }
    header > div{
        width: 300px;
    }
    main{
        width: 980px;
        margin: 0 auto;
    }
    .btn_menu{
        display: none;
    }
    .nav{
        width: 100%;
    }
    .nav ul{
        display: flex;
        justify-content: flex-end;
        opacity: 1;
        height: auto;
        background: none;
        min-width: 620px;
    }
    .nav ul li{
        border: none;
        margin: 0 20px;
        display: block;
    }
}