@charset "utf-8";

* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

html {
  -ms-text-size-adjust: 100%;  /* IE on Windows Phone用 */
  -webkit-text-size-adjust: 100%;  /* iOS用 */
  scroll-behavior: smooth;
}

html {
  font-size: 62.5%;
  color: #212121;
  font-family: "dnp-shuei-gothic-gin-std", sans-serif;
  font-weight: 500;
  font-style: normal;
  letter-spacing: 0.05em;
}

body {
    font-size: 1.5rem;
    line-height: 1.8;
}

h1, h2, h3 {
    font-size: 1.5rem;
    font-weight: 500;
}

a {
  text-decoration: none;
  color: #212121;
}

a:hover {
  transition: 0.3s;
  opacity: 0.3;
}

small {
    font-size: 0.9em;
}

.bold {
    font-family: "dnp-shuei-gothic-gin-std", sans-serif;
    font-weight: 600;
    font-style: normal;
}

li {
    list-style: none;
}

.flex {
    display: flex;
}

.logo {
    width: 300px;
    margin: 0 auto;
}

.logo img {
    width: 100%;
}

.main_nav {
    padding: 1em 0 80px 0;
}

.main_nav ul {
    justify-content: center;
}


.main_nav ul li a {
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.main_nav ul li {
    display: block;
    letter-spacing: 0.1em;
    padding-right: 1em;
    margin-right: 1em;
    border-right: 1px solid #212121;
}

.main_nav ul li:last-child {
    padding-right: 0;
    margin-right: 0;
    border-right: 0;
}

.main_wrap {
    max-width: 960px;
    margin: 0 auto;
}

.book_content {
    justify-content: space-between;
}

.content_A {
    width: 53%;
}

.content_B {
    width: 36%;
}

.content_C {
    max-width: 85%;
    margin: 0 auto;
}

.tags {
    padding-bottom: 1.5em;
}

.tags ul li {
    font-size: 1.4rem;
    letter-spacing: 0.1em;
    border-bottom: 1px solid #212121;
    padding-bottom: 0.1em;
    margin-right: 1.5em;
}

.tags ul li:last-child {
    margin-right: 0;
}

.book_title {
    font-size: 2.4rem;
    padding-bottom: 2em;
}

.book_heading {
    font-size: 1.8rem;
    font-weight: 600;
    padding-bottom: 2em;
}

.book_description {
    padding-bottom: 80px;
}

.book_cover {
    margin-bottom: 50px;
}

.book_cover img {
    width: 100%;
}

.book_detail {
    padding-bottom: 50px;
}

.book_detail ul li {
    font-size: 1.4rem;
    padding: 1em 0 1em 0;
    border-top: 1px solid #212121;
}

.book_detail ul li:last-child {
    border-bottom: 1px solid #212121;
}

.book_detail ul li p:first-child {
    letter-spacing: 0.1em;
    font-weight: 600;
    width: 70px;
}

.book_buy {
    padding-bottom: 50px;
}

.book_buy h3 {
    font-weight: 600;
    letter-spacing: 0.1em;
    padding-bottom: 1em;
}

.book_buy p {
    padding-bottom: 1em;
}

.book_buy ul {
    flex-wrap: wrap;
    justify-content: space-between;
}

.book_buy ul li {
    width: 48%;
    margin-bottom: 0.8em;
    text-align: center;
    border: 1px solid #C5C5C5;
    background-color: #ECECEC;  
}

.book_buy ul li a {
    display: inline-block;
    padding: 0.5em 1em;
}

.book_buy ul li:last-child {
    width: 100%;
}

.book_buy ul li:hover {
    transition: 0.5s;
    background-color: #C5C5C5;
}

.book_buy ul li:hover a {
    transition: 0.5s;
    color: white;
}

.book_img {
    padding-bottom: 80px;
}

.book_img img {
    width: 100%;
    margin-bottom: 1em;
    border: 1px solid #212121;
}

.copyright {
    font-size: 1.3rem;
    justify-content: center;
    padding-bottom: 2em;
}

.about_wrap h3 {
    font-weight: 600;
    font-size: 1.7rem;
}

.about_wrap h4 {
    font-weight: 600;
}

.pb_l {
    padding-bottom: 80px;
}

.pb_m {
    padding-bottom: 50px;
}

.pb_s {
    padding-bottom: 20px;
}

.about_wrap {
    max-width: 560px;
    margin: 0 auto;
    padding: 0 4% 80px 4%;
}

.about_list li {
    display: flex;
    font-size: 1.4rem;
    padding: 1em 0 1em 0;
    border-top: 1px solid #212121;
}

.about_list li:last-child {
    border-bottom: 1px solid #212121;
}

.about_list li p:first-child {
    letter-spacing: 0.1em;
    font-weight: 600;
    width: 70px;
}


@media only screen and (max-width:1080px) { /* 大画面 */
  .book_content {
    display: block;
  }

  .content_A, .content_B, .content_C {
    max-width: 600px;
    width: initial;
    margin: 0 auto;
    padding: 0 4%;
  }
}