<!-- ヘッダー -->
<header id="page-header" role="banner">
    <div class="inner">
        <h1><img src="img/tamotech-logo.png" alt=""></h1>
        <nav>
            <ul>
                <li><a href="https://tamontech.blog">Home</a></li>
                <!-- メニュー内容一部省略 -->
            </ul>
        </nav>
        <div class="btn-trigger" id="btn">
            <span></span><span></span><span></span>
        </div>
    </div>
    <div id="sns">
        <a href="https://twitter.com/tamotech1028">
　　　　　   Follow me!  |  twitter
        </a>
    </div>
</header>

<!-- ヘッダー画像上のワード -->
<div id="header-word">
    <h1>Lock the Image on the Back</h1>
</div>

<!-- コンテンツ -->
<div id="container" role="main">
    <!--コンテンツ内容省略-->
</div>

<!-- フッター -->
<footer id="page-footer" role="main-info">
    <!--フッター内容省略-->
</footer>

body {
    background-image: url("../img/header_img.jpg");
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
}

header {
    width: 100%;
    height: 12vh;
    color: #1d1d1d;
    background:rgba(255,255,255,0.4);
    position: fixed;
    top: 0;
    z-index: 20;
    
    .inner {
        //ここでは省略
    }
    #sns {
        position: fixed;
        right: 20px;
        top: 56vh;
        transform: translateY(-50%);
        a {
            color: #383838;
            font-size: 20px;
            letter-spacing: 10px;
            writing-mode: vertical-rl;
            
        }
    }
}
#header-word {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    z-index: 1;
    h1 {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%,-50%);
        letter-spacing: 10px;
        font-size: 50px;
        color: #e4e4e4;
    }
}

#container {
    position: relative;
    top: 100vh;
    background-color: #ffffff;
    z-index: 10;
    padding-top: 100px;
    padding-bottom: 100px;
}

footer {
    width: 100%;
    height: 5vh;
    color: #ffffff;
    background-color: #383838;
    position: relative;
    top: 95vh;
    z-index: 20;
}