:root {
  --serif: "Shippori Mincho", serif;
  --sans-serif: "Noto Sans JP", sans-serif;
  --zen-antique: "Zen Antique Soft", serif;
  --color: #222;
  --bgcolor: #fff;
  --blue: #005e96;
  --clamp128: clamp(100px, 10vw, 128px);
  --clamp96: clamp(82px, 8vw, 96px);
  --clamp72: clamp(68px, 6vw, 72px);
  --clamp64: clamp(56px, 5.3vw, 64px);
  --clamp48: clamp(44px, 4vw, 48px);
  --clamp44: clamp(40px, 3.66vw, 44px);
  --clamp32: clamp(28px, 2.6vw, 32px);
  --clamp28: clamp(26px, 2.3vw, 28px);
  --clamp26: clamp(24px, 2.16vw, 26px);
  --clamp24: clamp(20px, 2vw, 24px);
  --clamp18: clamp(16px, 1.5vw, 18px);
  --clamp17: clamp(16px, 1.41vw, 17px);
  --clamp16: clamp(15px, 1.4vw, 16px);
  --clamp15: clamp(13px, 1.25vw, 15px);
}

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

body {
  font-family: var(--serif);
  color: var(--color);
  line-height: 160%;
  scroll-behavior: smooth;
}

.top_header {
  display: none;
}

.mv {
  width: 100%;

  background-size: contain;
  background-repeat: no-repeat;
  background-position: top;
  background-image: url(images/mv_wide.webp);
}
@media (max-width: 1280px) {
  .mv {
    background-image: url(images/mv.webp);
  }
}
@media (max-width: 860px) {
  .mv {
    background-image: url(images/mv_tb.webp);
  }
}
@media (max-width: 640px) {
  .mv {
    background-image: url(images/mv_sp.webp);
  }
}

.mv .icon_x {
  width: 32px;
  height: 32px;
}

.mv .icon_book {
  width: 32px;
  height: 32px;
}

.mv_inner {
  display: flex;
  max-width: 1088px;

  margin: auto;
  justify-content: space-between;
  align-items: flex-start;
  gap: 56px;
  flex-wrap: nowrap;
  margin-bottom: 48px;
}
@media (max-width: 860px) {
  .mv_inner {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
}
.mv_left {
  flex-basis: 50%;
  flex-grow: 1;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
@media (max-width: 860px) {
  .mv_left {
    flex-basis: 100%;
    flex-grow: 1;
    flex-shrink: 1;
    grid-area: 1 / 2 / 2 / 3;
    padding: 0 var(--clamp24);
  }
}
.mv_center {
  flex-basis: 10%;
  flex-grow: 1;
  flex-shrink: 0;

  @media (max-width: 860px) {
    position: absolute;
    left: 0;
    top: 0;
  }
}

.mv_right {
  flex-basis: 30%;
  flex-grow: 1;
  flex-shrink: 1;
}

@media (max-width: 860px) {
  .mv_right {
    flex-basis: 100%;
    flex-grow: 1;
    flex-shrink: 1;
    grid-area: 2 / 1 / 3 / 3;
    padding: 0 var(--clamp24);
  }
}
.mv_title_store {
  padding-top: 32px;
  padding-bottom: 8px;
  font-size: 24px;
  color: white;
  text-align: center;
  filter: drop-shadow(0px 2px 8px rgba(0, 0, 0, 0.6));

  @media (max-width: 860px) {
    font-size: 20px;
    order: 1;
    padding-left: 15%;
  }
}

.mv_title_x {
  padding-top: 32px;
}
@media (max-width: 860px) {
  .mv_title_x {
    order: 2;
    padding-left: 20%;
  }
}
.mv_title_kengo {
  padding-top: 32px;
  padding-bottom: 32px;
  font-size: 28px;
  filter: drop-shadow(0px 2px 8px rgba(0, 0, 0, 0.6));

  margin-bottom: 36px;
  color: white;
}
@media (max-width: 860px) {
  .mv_title_kengo {
    font-size: 24px;
    order: 3;
    padding-left: 10%;
  }
}
.mv_image_store {
  @media (max-width: 860px) {
    order: 5;
  }
}

.mv_center h2 {
  flex-direction: row-reverse;
  display: flex;
}

.mv_center h2 span:nth-child(1) {
  font-weight: normal;
  background-color: var(--blue);
  color: white;
  font-size: 26px;
  margin-top: 200px;
  writing-mode: vertical-rl;
  letter-spacing: 0.4em;
  padding: 12px;
  display: inline-block;
  height: fit-content;
  white-space: nowrap;
}

@media (max-width: 860px) {
  .mv_center h2 span:nth-child(1) {
    margin-top: 0;
    font-size: var(--clamp26);
    padding: 12px;
  }
}

@media (max-width: 640px) {
  .mv_center h2 span:nth-child(1) {
    margin-top: 0;
    font-size: 22px;
    padding: 20px 16px;
  }
}
.mv_center h2 span:nth-child(2) {
  font-weight: normal;
  background-color: #eeeeee;
  color: var(--blue);
  font-size: 44px;
  letter-spacing: 0.4em;
  margin-top: 380px;
  writing-mode: vertical-rl;
  letter-spacing: 0.4em;
  padding: 19px;
  display: inline-block;
  height: fit-content;
  white-space: nowrap;
}
@media (max-width: 860px) {
  .mv_center h2 span:nth-child(2) {
    margin-top: 40px;
    font-size: 36px;
    padding: 12px;
  }
}

@media (max-width: 640px) {
  .mv_center h2 span:nth-child(2) {
    margin-top: 80px;
    font-size: 24px;
    padding: 20px 16px;
  }
}
.mv_center h2 span:nth-child(3) {
  font-family: var(--zen-antique);
  font-weight: 400;
  background-color: #d9333f;
  color: white;
  font-size: 28px;
  margin-top: 750px;
  writing-mode: vertical-rl;
  letter-spacing: 0.2em;
  padding: 12px;
  display: inline-block;
  height: fit-content;
  white-space: nowrap;
  text-orientation: upright;
  margin-right: 5px;
  margin-left: -35px;
  text-shadow: 0 0 8px #fffd4e;
}

@media (max-width: 860px) {
  .mv_center h2 span:nth-child(3) {
    margin-top: 240px;
    font-size: var(--clamp28);
    padding: 8px;
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  .mv_center h2 span:nth-child(3) {
    margin-top: 200px;
    font-size: 22px;
    padding: 20px 8px;
    margin-right: 0;
  }
}
.mv_kengo {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mv_kengo h3 {
  color: var(--blue);
  font-size: 20px;
  line-height: 170%;
  vertical-align: middle;
  text-align: center;
  margin-top: 16px;
}

.mv_kengo p {
  margin: 16px auto;
  font-size: 15px;
  line-height: 160%;
  text-align: left;
}

.mv_kengo_prof {
  width: 100%;
  height: auto;
  margin-top: 250px;
  border-radius: 16px;
  margin-bottom: 16px;
}

@media (max-width: 1280px) {
  .mv_kengo_prof {
    margin-top: 320px;
  }
}
@media (max-width: 860px) {
  .mv_kengo_prof {
    margin-top: 0;
    margin: 0 auto;
    max-width: 240px;
  }
}
.mv_catchcopy {
  color: var(--blue);
  font-size: var(--clamp28);
  text-align: center;
  letter-spacing: 0.2em;
  line-height: 160%;
  display: block;
  width: 100%;
  padding: 18px 0;
}
@media (max-width: 860px) {
  .mv_catchcopy {
    font-size: var(--clamp32);
    letter-spacing: 0.1em;
    line-height: 160%;
    order: 4;
    padding-top: var(--clamp64);
  }
}
@media (max-width: 640px) {
  .mv_catchcopy {
    font-size: var(--clamp24);
    padding-top: 150px;
  }
}
@media (max-width: 480px) {
  .mv_catchcopy {
    padding-top: 50px;
  }
}

.mv_description {
  font-size: var(--clamp17);
  line-height: 180%;
}

@media (max-width: 860px) {
  .mv_description {
    order: 6;
  }
}
.mv_logo {
  margin-top: var(--clamp24);
}
@media (max-width: 860px) {
  .mv_logo {
    margin-top: 0;
  }
}
.logo_kinoppy {
  max-width: 300px;
  height: auto;
}
@media (max-width: 860px) {
  .logo_kinoppy {
    display: none;
  }
}
.icon_x {
  width: 32px;
  height: 42px;
  object-fit: contain;
  margin-bottom: -5px;
}

.icon_x_mini {
  width: 24px;
  height: 24px;
  object-fit: contain;
  margin-bottom: -5px;
}

.image_store {
  border-radius: 16px;
  width: 100%;
  height: auto;
}

@media (max-width: 860px) {
  .image_store {
    margin-top: 0;
  }
}
.index_area {
  background-color: #fafafa;
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 20;
}

.icon_book {
  width: 18px;
  height: 18px;
  object-fit: contain;
  vertical-align: middle;
}

#index_btn {
  text-align: center;
  max-width: 1024px;
  margin: auto;
  cursor: pointer;
}

#index_panel {
  display: none;
}

#index_panel > ul {
  display: flex;
  width: 100%;
  gap: 16px;
  margin-top: 12px;
  list-style: none;
  overflow: auto;
  margin-bottom: 12px;
}

#index_panel > ul li {
  padding: 6px;
  flex-basis: 200px;
  flex-shrink: 0;
  flex-grow: 1;
  text-align: left;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 12px;
}

#index_panel > ul img {
  object-fit: contain;
  width: 100px;
  height: 100px;
  margin-bottom: 12px;
}

#index_panel > ul a {
  text-decoration: none;
  font-size: 13px;
  line-height: 150%;
  text-align: center;
}

.book_cover_wrapper {
  padding-top: 50px;
}

.book_cover {
  padding: 0 var(--clamp24);
}
@media (max-width: 860px) {
  .book_cover {
    padding-left: 0;
  }
}
.book {
  display: flex;
  list-style: none;
  max-width: 1024px;
  min-height: 860px;
  margin: auto;
  margin-top: var(--clamp96);
}

@media (max-width: 860px) {
  .book {
    display: grid;
    min-height: 450px;
    grid-template-columns: 80px auto;
    grid-template-rows: auto auto auto;
  }
}
.book .thumbnail {
  padding: var(--clamp24);
  padding-top: var(--clamp48);
  display: grid;
  place-content: center;
}

.book .thumbnail img {
  aspect-ratio: 220 / 312;
  object-fit: cover;
  width: clamp(136px, 15vw, 180px);
  height: auto;
}

.book h2 {
  padding: var(--clamp24) var(--clamp64);
  width: fit-content;
  text-align: center;
  font-size: var(--clamp26);
  line-height: 160%;
  transform: rotate(-3.8deg);
  position: relative;
  margin-top: -64px;
  margin-left: -24px;
  z-index: 999;
}
@media (max-width: 860px) {
  .book h2 {
    margin-left: -64px;
    font-size: var(--clamp24);
  }
}
.book > .left {
  flex-basis: 50%;
  flex-grow: 1;
  flex-shrink: 1;
  display: flex;
  flex-direction: column;
  font-size: var(--clamp15);
  line-height: 140%;
  padding: var(--clamp32);
  padding-left: 0;
}
@media (max-width: 860px) {
  .book > .left {
    order: 2;
    padding-right: 0;
    padding-left: 12px;
  }
}
.book > .center {
  flex-basis: 60px;
  position: relative;
  background-color: rgba(255, 255, 255, 0.15);
}

@media (max-width: 860px) {
  .book > .center {
    display: grid;
    order: 1;
    grid-row: 1 / span 2;
    justify-items: center;
    align-items: start;
    width: 56px;
  }
  .book > .center .back {
    position: sticky;
    top: 48px;
    height: max-content;
    text-align: center;
  }
}
.book > .center .back {
  display: flex;
  flex-direction: column;
  flex-grow: 0;
  flex-shrink: 0;
  padding: var(--clamp32) 0;
  justify-content: space-between;
  align-items: center;
  gap: var(--clamp32);
  height: 100%;
}
.book > .center p {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: var(--clamp24);
  letter-spacing: 0.2em;
}

.book > .right {
  flex-basis: 50%;
  flex-grow: 1;
  flex-shrink: 1;
  display: flex;
  flex-direction: column;
  padding: var(--clamp32);
  padding-right: 0;
  font-size: var(--clamp17);
  line-height: 180%;
}
@media (max-width: 860px) {
  .book > .right {
    order: 3;
    padding-left: 12px;
    padding-right: 0;
  }
}
.book dl {
  display: flex;
  border-bottom: 1px solid rgba(128, 128, 128, 0.5);
  gap: var(--clamp16);

  @media (max-width: 860px) {
    flex-direction: column;
    gap: 0;
  }
}

.book dl:last-of-type {
  border-bottom: 0;
}

.book dt {
  flex-basis: 25%;
  flex-shrink: 0;
  flex-grow: 0;
  padding: var(--clamp16) 0;

  @media (max-width: 860px) {
    padding: 6px 0;

    br {
      display: none;
    }

    p {
      display: inline-block;
      vertical-align: middle;
    }

    figure {
      display: inline-block;
      vertical-align: middle;
      margin-right: 16px;
    }
  }
}

.book dd {
  flex-basis: 75%;
  flex-shrink: 1;
  flex-grow: 1;
  padding: var(--clamp16) 0;

  @media (max-width: 860px) {
    padding: 6px 0;
  }
}

.book a.btn_buy,
.book a.btn_buy:visited,
.book .reading_sample,
.book .reading_sample:visited {
  display: flex;
  justify-content: center;
  align-items: center;
  height: fit-content;
  width: fit-content;
  padding: 6px 32px;
  border-radius: 999px;
  text-align: center;
  font-size: var(--clamp18);
  text-decoration: none;
  border-width: 1px;
  border-style: solid;
  cursor: pointer;
  white-space: nowrap;
}

.book .action_btns {
  display: flex;
  width: fit-content;
  gap: var(--clamp24);
  justify-content: space-between;
  align-items: center;
  margin: var(--clamp24) auto;

  a {
    flex-basis: 50%;
    flex-grow: 1;
    flex-shrink: 1;
  }

  @media (max-width: 860px) {
    flex-direction: column;
    gap: var(--clamp16);
  }
}

.kengo_comment p {
  text-align: center;
  width: 80px;
}

.kengo_comment figure {
  text-align: center;
  width: 80px;
}

.left_btn {
  cursor: pointer;
  border-radius: 999px;
  background-color: #222;
  transition: all 0.3s ease-out;
  overflow: hidden;
  width: 60px;
  height: 60px;
  object-fit: contain;
  position: fixed;
  left: 20px;
  top: 0;
  bottom: 0;
  margin: auto;
  display: grid;
  place-content: center;

  img {
    width: 40px;
    height: 40px;
    aspect-ratio: 1 / 1;
    object-fit: contain;
  }

  @media (max-width: 1160px) {
    margin-bottom: 0;
    bottom: 20px;
  }
}

.swiper-button-prev,
.swiper-button-next {
  color: white !important;

  &:hover,
  &:active {
    opacity: 0.7;
  }
}

.book_link {
  display: grid;
  place-content: center;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.mv_banner {
  padding: 8px 24px;
  background-color: tomato;
  color: white;
  font-size: 19px;
  font-weight: 600;
  text-align: center;
  margin-top: 12px;
  margin-bottom: 12px;
  display: block;
  line-height: 22px;
  letter-spacing: 0.1;
}

@media (min-width: 481px) and (max-width: 860px) {
  .sp {
    display: none;
  }

  .tb {
    display: inherit;
  }

  .pc {
    display: none;
  }
}

@media (min-width: 861px) {
  .sp {
    display: none;
  }

  .tb {
    display: none;
  }

  .pc {
    display: inherit;
  }
}

/* バックナンバー */
#menu-toggle {
  position: fixed;
  bottom: 20px;
  right: 0;
  z-index: 1001;
  cursor: pointer;
}
#menu-toggle.open {
  border-radius: 0px 0px 0px 8px;
}
#menu-toggle {
  background-color: #26529e;
  color: yellow;
  text-align: center;
  font-size: 22px;
  line-height: 60px;
  height: 60px;
  display: grid;
  place-content: center;
  position: fixed;
  bottom: 20px;
  width: 300px;
  border-radius: 8px 0 0 8px;
  display: grid;
  place-content: center;
}

#menu-toggle:hover {
  background-color: #153978;
}
@media (max-width: 760px) {
  #menu-toggle {
    position: fixed;
    background-color: #26529e;
    color: yellow;
    text-align: center;
    font-size: 22px;
    padding: 0;
    width: 100%;
    bottom: 0;
    right: 0;
    left: 0;
    top: auto;
    width: 100%;
    border-radius: 0;
  }
}

#dropdown-menu {
  position: fixed;
  right: 0;
  bottom: 80px;
  width: 300px;
  background: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 8px 0 0 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.4s ease;
  z-index: 1000;
}

#dropdown-menu.open {
  max-height: 800px; /* 適当に大きめの高さを指定 */
}

@media (max-width: 760px) {
  #dropdown-menu {
    position: fixed;
    bottom: 60px;
    top: auto;
    right: 0;
    width: 100%;
    margin: auto;
    border-radius: 0;
  }
  #dropdown-menu.open {
    max-height: 500px;
  }
}

#dropdown-menu ul {
  list-style: none;
  margin: 0;
  padding: 10px 20px;
}

#dropdown-menu li {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}
#dropdown-menu li:last-child {
  border: 0;
}

#dropdown-menu a {
  text-decoration: none;
  color: #26529e;
  font-size: 16px;
  line-height: 160%;
}
#dropdown-menu a:hover {
  color: #153978;
}