* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
}

body {
    font-family: "Arial", "Meiryo", "Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
    background-color: rgb(198, 188, 182);
    margin: 5% 5% 0%;
}

.cover_art img {
    margin: 0% 15% 5%;
    width: 70%;
}

.title {
    margin: 7% 5%
}

.index {
    margin-left: 18%;
}

.chapter_link {
    margin: 0% 1%;
}

.chapter_title {
    margin: 50px 0;
    padding: 0 50px;
}

.outline {
    margin: 3% 15%;
}

.text {
    margin: 3% 10%;
}

ul {
    margin: 0% 0% 5%;
}

ul li {
    margin: 2% 0%;
}

.line {
    margin: 0% 15%;
    width: 50%;
}

.notes {
    margin: 0% 15%;
}

/* pc */
@media screen and (min-width: 769px) {
    .links {
        margin: 5% 0%;
        text-align: center;
    }
}

/* mobile */
@media screen and (max-width: 768px) {
    .links {
        margin: 5% 0% 50%;
        text-align: center;
    }
}