@charset "UTF-8";

body {
    margin: 0;
    background-color: #eeeeee;
}

img {
    display: block;
}

.header {
    height: 112px;
    background-color: #ffffff;
    position: sticky;               /* 常に上部に表示 */
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    height: 100%;
}

.header-container > .site {
    margin-right: auto;
}

.w-container {
    width: min(92%, 1166px);
    margin: auto;
}

.navbtn {
    padding: 0;
    outline: none;
    border: none;
    background: transparent;
    cursor: pointer;
    color: #aaaaaa;
    font-size: 30px;
}

.chapter-image {
    width: 100%;
    height: auto;
}