@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP&display=swap');
html{
    width: 100%;
    height: 100%;
}
body{
    width: 100%;
    height: 100%;
    background: #ffffff;
    color: #3e2723;
    font-family: 'Noto Serif JP', serif;
    line-height: 6vw;
}
/* header */
header{
    display: flex;
    height: 25vw;
    background: #f0f0f0;
    border-bottom: 5px solid #3e2723;
}
.header_L{
    width: 70vw;
}
#header_icon_box{
    display: flex;
    justify-content: space-around;
    width: 50vw;
    margin: 2vw 0 0 0;
}
#header_icon_box a{
    display: block;
}
#icon_twitter{
    width: 9vw;
    height: 7vw;
    background: url("../img/twitter.png") 50% 50% / 100% 100% no-repeat;
}
#icon_instagram{
    width: 7vw;
    height: 7vw;
    background: url("../img/instagram.png") 50% 50% / 100% 100% no-repeat;
}
#icon_youtube{
    width: 10vw;
    height: 7vw;
    background: url("../img/youtube.png") 50% 50% / 100% 100% no-repeat;
}
.header_R{
    width: 30vw;
}
h1{
    padding: 2vw 2vw;
    font-size: 10vw;
    text-align: left;
    
}
.h1_span{
    font-size: 5vw;
}
nav{
    justify-content: space-around;
    margin: 0px auto;
}
.menu_link{
    display: block;
    padding: 0.5vw 2vw 0.5vw 0;
    font-size: 4vw;
    text-align: right;
    line-height: 5vw;
}
.selected{
    background: #3e2723;
    color: #f0f0f0;
}

/* footer */
footer{
    position: sticky;
    top: 100vh;
    padding: 2vw;
    background: #3e2723;
    color: #f0f0f0;
    font-size: 3.5vw;
    text-align: center;
}

@media screen and (min-width: 1023px){
body{
    line-height: 34px;
}
/* header */
header{
    position: fixed;
    display: flex;
    justify-content: center;
    width: 100%;
    height: 160px;
}
.header_L{
    width: 700px;
}
#header_icon_box{
    width: 700px;
    margin: 20px 0 0 0;
    justify-content: flex-start;
}
#header_icon_box a{
    display: block;
    margin: 0 20px;
}
#icon_twitter{
    width: 50px;
    height: 40px;
    background: url("../img/twitter.png") 50% 50% / 100% 100% no-repeat;
}
#icon_instagram{
    width: 40px;
    height: 40px;
    background: url("../img/instagram.png") 50% 50% / 100% 100% no-repeat;
}
#icon_youtube{
    width: 60px;
    height: 40px;
    background: url("../img/youtube.png") 50% 50% / 100% 100% no-repeat;
}
.header_R{
    width: 400px;
}
h1{
    padding: 20px 0px 0px 0;
    font-size: 60px;
}
.h1_span{
    font-size: 30px;
}
nav{
    justify-content: space-around;
    margin: 0px auto;
}
.menu_link{
    padding: 5px 20px 5px 0;
    font-size: 25px;
    line-height: 30px;
}

/* footer */
footer{
    position: sticky;
    top: 100vh;
    padding: 20px;
    background: #3e2723;
    color: #f0f0f0;
    font-size: 20px;
    text-align: center;
}
}