/* 共通デザイン */
body{
    font-family:"Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Arial", "Yu Gothic", "Meiryo", sans-serif;
    line-height: 160%;
    color: rgb(90,90,90);
}
img{
    width:100%;
    max-width: 100%;
    height: auto;
}
h2{
    font-size: 28px;
    font-weight: bold;
    color: rgb(185,125,75);
    line-height: 150%;
    text-align: center;
    width: 960px;
    margin: 0 auto 30px;
    border-bottom: 2px solid rgb(185,125,75);
}
h3{
    font-size: 21px;
    padding-bottom: 10px;
}
.cont_link,
.cont_link:visited{
    color: rgb(0, 60, 255);
    text-decoration: underline;
}

/* 共通レイアウト */
header,
nav,
main,
section,
section>div,
footer{
    width: 100%;
}

/* ヘッダー */
header{
    background-color: rgb(210,180,175);
    padding-top: 10px;
    display: grid; 
    grid-template-columns: 1fr 280px 1fr; 
    grid-template-rows: 80px 1fr 1fr; 
    position: sticky;
    top: 0;
    box-shadow: 0px 1px 5px rgba(0,0,0,0.45);
}
header>p{
    z-index: 10;
    grid-area: 1 / 2 / 3 / 3;
}

/* ナビゲーション */
nav{
    background-color: rgb(255,255,255);
    padding-top: 30px;
    grid-area: 2 / 1 / 4 / 4;
}
nav ul{
    padding: 0;
    display: flex;
    flex-flow: row nowrap;
    justify-content: space-around;
    width:960px;
    margin: auto;
    list-style-type: none;
}
nav a{
    display: block;
    padding: 20px 10px;
}
nav a:link,a:visited{
    color:rgb(51,51,51);
    text-decoration: none;
}
nav a:hover{
    background-color:rgb(255,210,210) ;
    color: rgb(200,50,0);
}

/* フッター */
footer{
    background-color: rgb(210,180,175);
    padding: 40px 0 25px 0;
}
footer p{
    text-align: center;
    font-size: 14px;
}