@charset "utf-8";

* {
  box-sizing: border-box;
  max-width: 100%;
  /* overflow-x: hidden; */
}

body {
  margin-inline: auto;
  font-family: "Helvetica Neue", "Helvetica", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Arial", "Yu Gothic", "Meiryo", sans-serif;
  font-weight: 400;
  color: #010c0f;
}

body {
  background-image: url(../img/umi1.jpg);
}

html {
  font-size: 62.5%;
  font-feature-settings: "palt";
  scroll-behavior: smooth;
}

/*///////////////////////////
ローディング
///////////////////////////*/
#loading {
  width: 120vw;
  height: 120vh;
  background-color: #3193a4;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9998;
}

.loader {
  margin: 40vh auto;
  --r1: 154%;
  --r2: 68.5%;
  width: 15vw;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(var(--r1) var(--r2) at top, #0000 79.5%, #269af2 80%),
    radial-gradient(var(--r1) var(--r2) at bottom, #269af2 79.5%, #0000 80%),
    radial-gradient(var(--r1) var(--r2) at top, #0000 79.5%, #269af2 80%),
    #ccc;
  background-size: 50.5% 220%;
  background-position: -100% 0%, 0% 0%, 100% 0%;
  background-repeat: no-repeat;
  animation: l9 1.8s infinite linear;
}

@keyframes l9 {
  33% {
    background-position: 0% 33%, 100% 33%, 200% 33%
  }

  66% {
    background-position: -100% 66%, 0% 66%, 100% 66%
  }

  100% {
    background-position: 0% 100%, 100% 100%, 200% 100%
  }
}

.loaded {
  opacity: 0;
  visibility: hidden;
}

/*///////////////////////////

///////////////////////////*/
main {
  margin-inline: auto;
  max-width: 1200px;
}

.container {
  position: relative;
}

.mainvisual {
  width: 100%;
  height: 800px;
}

/* チケット・グッズボタン */
.ticket-btn {
  display: flex;
  position: absolute;
  font-size: clamp(1.8rem, calc(0.5vw + 1.800rem), 2.5rem);
  overflow: hidden;
  z-index: 30;
}

.ticket-btn .ticket {
  flex-direction: row;
  text-decoration: none;
  padding: 25px;
  color: #024f60;
  border-radius: 10px;
  letter-spacing: 0.1rem;
  animation: btn_animation 7s ease-in-out alternate infinite;
  background: linear-gradient(90deg,
      rgba(251, 228, 110, 1),
      rgba(232, 208, 30, 1));
  background-size: 500% 500%;
  cursor: pointer;
  font-family: "Zen Old Mincho", serif;
  font-weight: 900;
  vertical-align: top;
  transition: 0.2s ease-in-out;
}

.ticket-btn .goods {
  text-decoration: none;
  padding: 25px;
  background-color: #024f60;
  border-radius: 10px;
  color: #e3f4e8;
  letter-spacing: 0.1rem;
  animation: btn_animation 8s ease-in-out alternate infinite;
  background: linear-gradient(90deg,
      rgba(15, 89, 131, 1),
      rgba(4, 153, 187, 1));
  background-size: 500% 500%;
  cursor: pointer;
  font-family: "Zen Old Mincho", serif;
  font-weight: 900;
  font-style: normal;
  transition: 0.2s ease-in-out;
}

@keyframes btn_animation {
  0% {
    background-position: 0% 50%;
  }

  100% {
    background-position: 100% 50%;
  }
}

.ticket-btn .ticket::before {
  content: url(../icon/ticket.svg);
  display: inline-block;
  width: 1.5em;
  height: 0.9em;
  vertical-align: text-top;
  margin-right: 0.5em;
}

.ticket-btn .goods::before {
  content: url(../icon/shopping.svg);
  display: inline-block;
  width: 1.3em;
  height: 0.9em;
  vertical-align: text-top;
  margin-right: 0.5em;
}

.ticket-btn .ticket:hover {
  border-radius: 50px;
}

.ticket-btn .goods:hover {
  border-radius: 50px;
}

@media screen and (max-width: 1250px) {
  .container .ticket-btn {
    flex-direction: column;
  }

  .ticket-btn .ticket,
  .ticket-btn .goods {
    padding: 20px;
  }
}

/* 展覧会タイトル */
.site_title {
  position: absolute;
  font-size: clamp(8rem, calc(1.25vw + 7.750rem), 10rem);
  top: 188px;
  right: 13px;
  text-align: center;
  color: #e3f4e8;
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-weight: 900;
  animation: hidari 3s ease-in-out, naminami 4s ease-in-out 5s infinite;
  filter: blur(0.5px);
  margin-left: 50px;
}

@keyframes naminami {
  0% {
    opacity: 1;
    transform: translateY(0px);
  }

  50% {
    opacity: 0.8;
    transform: translateY(2px);
  }

  100% {
    opacity: 1;
    transform: translateY(0px);
  }
}

@keyframes hidari {
  0% {
    opacity: 0;
    transform: translateX(-100px);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

.container .sub-title {
  position: absolute;
  font-size: clamp(2.3rem, calc(0.5vw + 2.000rem), 2.8rem);
  top: 303px;
  right: 118px;
  letter-spacing: 0.2em;
  font-family: "Zen Old Mincho", serif;
  font-weight: 900;
  animation: migi 3s ease-in-out;
}

@keyframes migi {
  0% {
    opacity: 0;
    transform: translateX(100px);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

.container .date {
  position: absolute;
  font-size: 7rem;
  bottom: 220px;
  right: 3vw;
  max-width: 600px;
  margin-left: 35px;
  animation: sita 3s ease-in-out;
}

@keyframes sita {
  0% {
    opacity: 0;
    transform: translateY(80px);
  }

  50% {
    opacity: 0.5;
    transform: translateY(-50px);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

.date span {
  font-size: 5.5rem;
  color: #010c0f;
}

@media only screen and (max-width: 450px) {
  .site_title {
    font-size: 9rem;
    top: 50vw;
    right: -1vw;
    margin-inline: auto;
  }

  .container .sub-title {
    top: 80vw;
    right: 22vw;
  }

  .container .date {
    max-width: 100vw;
    right: -2vw;
    padding-right: 20px;
  }
}

/* Gナビ */
.hamburger {
  display: none;
  cursor: pointer;
  position: fixed;
  top: 15px;
  right: 20px;
  z-index: 8000;
  flex-direction: column;
  align-items: center;
  width: 80px;
  height: 70px;
  border: none;
  border-radius: 5px;
  padding-top: 5px;
  background-color: rgba(239, 239, 239, 0.8);
}

.hamburger .bar {
  width: 40px;
  height: 3px;
  background-color: #125a6b;
  transition: 0.5s;
  border-radius: 3px;
  margin: 5px;
}

.hamburger.open .bar:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.open .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.open .bar:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

.menu-text {
  font-size: 1.6rem;
  vertical-align: bottom;
}

.gnav-wrap .gnav-ticket {
  color: #cfe8df;
  padding-right: 5px;
  letter-spacing: 0.1em;
}

.gnav-wrap {
  position: absolute;
  background-color: transparent;
  box-shadow: 0 1px 30px 0 rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  right: 18px;
  top: 15px;
}

.gnav-list a {
  text-decoration: none;
  color: #002a38;
  font-size: 1.8rem;
}

.gnav-list li {
  list-style: none;
  padding: 18px;
}

.gnav-list {
  display: none;
}

.gnav-list.open {
  display: flex;
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateX(100%);
  }

  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

.gnav-list {
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.8rem;
  font-weight: bold;
  gap: 3em;
}

.gnav-list li {
  background-image: linear-gradient(#cfe8df, #cfe8df);
  background-repeat: no-repeat;
  background-position: bottom right;
  background-size: 0 1px;
  transition: background-size 0.3s;
}

.gnav-list li:hover {
  background-position: bottom left;
  background-size: 100% 2px;
}

@media screen and (min-width: 900px) {
  .gnav-list {
    display: flex;
  }
}

@media screen and (max-width: 900px) {
  .gnav-list {
    display: none;
    flex-direction: column;
    background-color: rgba(239, 239, 239, 0.95);
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 50px;
    border-radius: 8px;
    box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    width: 94%;
    height: 86%;
  }

  .gnav-wrap .gnav-ticket {
    padding-right: 0;
    color: #e83f23;
  }

  .gnav-list a {
    font-size: 2.2rem;
    color: #288391;
    letter-spacing: 0.15em;
  }

  .hamburger {
    display: flex;
  }
}

@media screen and (max-width: 600px) {
  .gnav-list {
    right: 0;
    height: 90%;
    width: 100%;
  }
}

/* ご案内ガイド */
.guide-list {
  background-color: rgba(227, 244, 232, 0.8);
  border-radius: 10px;
  position: absolute;
  bottom: 38px;
  left: 5%;
  margin-inline: auto;
  width: 90%;
  display: flex;
  align-items: center;
  justify-content: space-around;
  font-size: clamp(1.2rem, calc(0.5vw + 1.100rem), 1.8rem);
  font-weight: 600;
  gap: 1em;
  letter-spacing: 0.05rem;
  max-height: 160px;
}

.guide-list a {
  text-decoration: underline;
}

.guide-list li {
  list-style: none;
}

.guide-list li span {
  font-size: 1.6rem;
  display: block;
  text-align: center;
}

.guide {
  border-radius: 5px;
  padding: 1em;
  margin-left: 30px;
  background-color: #8fc1c0;
}

.date2 {
  margin: 30px;
  font-size: clamp(1.8rem, calc(1vw + 1.500rem), 3rem);
  letter-spacing: 0.2em;
  color: #010c0f;
  white-space: nowrap;
}

.guide-item {
  margin-right: 30px;
  line-height: 1.8em;
}

@media screen and (max-width: 900px) {
  .guide-list {
    gap: 0;
    width: 100%;
    left: 0;
    border-radius: 0;
    padding: 1em 0;
  }

  .date2 {
    font-size: 1.8rem;
    margin: 15px;
  }
}

/* ニュース */
#news {
  margin: 50px 30px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  font-size: clamp(1.2rem, calc(0.5vw + 0.900rem), 1.6rem);
  padding: 1.5em;
  background-color: rgba(217, 248, 249, 0.8);
  border-radius: 10px;
}

#news h2 {
  font-size: clamp(3.5rem, calc(1.5vw + 3.5rem), 7rem);
  color: #3193a4;
}

.news {
  border-left: solid 2px #207582;
  padding: 0 30px;
  width: 500px;
}

.news-item:nth-child(n+4) {
  display: none;
}

.is-hidden {
  display: block !important;
}

.news-btn {
  border: solid 2px rgba(18, 90, 107, 0.5);
  box-shadow: 2px 10px 15px 0 rgba(18, 90, 107, 0.1);
  border-radius: 2px;
  background-color: #fff;
  letter-spacing: 0.2rem;
  font-size: 1.1em;
  cursor: pointer;
  width: 7em;
  height: 2.5em;
}

.news-btn:hover {
  background-color: #3193a4;
  color: #fff;
}

@media screen and (max-width: 900px) {
  #news {
    margin: 50px 10px;
  }

  .news {
    max-width: 80vw;
    border: none;
  }

  .news-btn {
    font-size: 1.4rem;
    height: 4em;
    font-weight: 600;
    margin: 1em 0;
  }
}

@media screen and (max-width: 600px) {
  #news {
    flex-direction: column;
  }
}

/* 見どころ */
#highlights {
  margin: 30px;
  background-color: #8fc1c0;
  border-radius: 30px;
  padding: 30px;
}

.highlights {
  font-size: clamp(3.5rem, calc(1.5vw + 3.5rem), 7rem);
  text-align: center;
  padding: 30px;
  font-weight: bold;
  letter-spacing: 0.05em;
  color: #e3f4e8;
}

.highlights h2 {
  margin: 50px;
}

.highlights span {
  font-size: 1.8rem;
  display: flex;
  flex-direction: column;
  color: #010c0f;
  font-weight: 600;
}

#highlights .flex_item {
  display: flex;
  border-bottom: 3.5px dotted azure;
}

#highlights .flex_item:nth-last-of-type(1) {
  border-bottom: none;
}

#highlights .flex_item:nth-child(odd) {
  flex-direction: row-reverse;
}

#highlights .item {
  padding-bottom: 30px;
  justify-content: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin-top: 30px;
  margin-left: 2em;
}

#highlights .item p {
  font-size: clamp(1.2rem, calc(0.5vw + 0.900rem), 1.6rem);
  margin: 30px;
  padding-left: 20px;
  line-height: 2em;
  text-indent: 1em;
}

#highlights .item .sec_title {
  text-align: center;
  font-size: 2.2em;
  margin: 10px;
  letter-spacing: 0.1rem;
  color: #024f60;
  font-family: "Zen Old Mincho", serif;
  font-weight: bold;
}

#highlights .item img {
  height: 480px;
  margin: 0 auto;
  object-fit: cover;
  border-radius: 3%;
}

.flex_item .item figcaption {
  margin-top: 0.5em;
  text-align: center;
}

@media screen and (max-width: 900px) {
  #highlights {
    margin: 30px 10px;
    padding: 30px 10px;
  }

  #highlights .flex_item {
    margin-left: 1vw;
    flex-direction: column-reverse;
    border-bottom: none;
  }

  #highlights .flex_item:nth-child(odd) {
    flex-direction: column-reverse;
  }

  #highlights .item {
    border: none;
    justify-content: center;
    width: 90%;
    padding: 0;
  }

  #highlights .item p {
    margin: 0 auto;
    padding-top: 50px;
  }

  #highlights .item:nth-child(even)::before {
    content: "";
    width: 100%;
    height: 0;
    border-top: 3.5px dotted #cfe8df;
    margin-bottom: 3em;
  }
}

/* 作品紹介 */
#introduction {
  margin: 80px 30px;
  background-color: #8fc1c0;
  border-radius: 30px;
  padding-bottom: 30px;
}

#introduction h2 {
  padding: 50px;
  font-size: clamp(3.5rem, calc(1.5vw + 3.5rem), 7rem);
  text-align: center;
  letter-spacing: 0.05em;
  color: #e3f4e8;
}

#introduction h2 span {
  font-size: 1.8rem;
  display: flex;
  flex-direction: column;
  color: #010c0f;
  font-weight: 600;
}

#introduction .flex-container {
  margin: 0 auto;
  width: 90%;
  display: grid;
  place-content: center;
  grid-template-columns: repeat(4, minmax(170px, 1fr));
  grid-template-rows: repeat(2, 1fr);
  gap: 30px;
  padding: 0;
}

#introduction li {
  list-style: none;
}

#introduction img {
  aspect-ratio: 1 / 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  padding: 5px;
  border-radius: 10px;
  transition: 0.1s ease-in-out;
}

#introduction img:hover {
  box-shadow: 0px 0px 15px 2px rgba(0, 0, 0, 0.2);
  transform: scale(1.1);
  opacity: .7;
}

#introduction figcaption {
  margin: 30px 5vw;
  text-align: justify;
}

/* モーダル */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.8);
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.modal-content {
  aspect-ratio: auto;
  margin: 0 auto 20px;
  border: 2px solid rgba(40, 131, 145, .7);
}

.close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #cfe8df;
  font-size: 50px;
  font-weight: bold;
  cursor: pointer;
}

#caption {
  text-align: center;
  color: #cfe8df;
}

#prev,
#next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  letter-spacing: .1em;
  padding: 10px;
  border-radius: 5px;
  background-color: #288391;
  color: #cfe8df;
  border: none;
  cursor: pointer;
}

#prev {
  left: 10px;
}

#next {
  right: 10px;
}


#modal img:hover {
  box-shadow: none;
  transform: none;
}

@media screen and (max-width: 900px) {
  #introduction {
    margin: 30px 10px;
  }

  #introduction .flex-container {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(auto);
    gap: 30px;
  }
}

@media only screen and (max-width: 500px) {


  #introduction .flex-container {
    padding: 0;
    grid-template-columns: repeat(1, 1fr);
    grid-template-rows: repeat(8, 1fr);
    gap: 10px;
    justify-content: center;
  }

  #introduction img {
    pointer-events: none;
  }

  #introduction figcaption {
    padding: 0;
    margin: 20px;
  }
}

/* 開催概要 */
#overview {
  margin: 30px;
  padding: 30px;
  background-color: rgba(237, 253, 255, 0.8);
  border-radius: 30px;
  letter-spacing: 0.3em;
}

#overview h2 {
  letter-spacing: 0.05em;
  text-align: center;
  color: #3193a4;
  font-size: clamp(3.5rem, calc(1.5vw + 3.5rem), 7rem);
  margin: 30px;
}

#overview span {
  font-size: 1.8rem;
  display: flex;
  flex-direction: column;
  color: #010c0f;
  font-weight: 600;
}

#overview p {
  font-size: clamp(1.2rem, calc(0.5vw + 1.100rem), 1.8rem);
  line-height: 2em;
  margin: 50px;
  padding-bottom: 30px;
  color: #010c0f;
  border-bottom: 1.5px solid #3193a4;
}

#overview p span {
  font-size: clamp(1.5rem, calc(0.5vw + 1.300rem), 2rem);
  display: block;
  color: #288391;
  font-weight: bold;
  margin-bottom: 1em;
}

.share {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: #125a6b;
  padding: 30px;
}

#overview .share p {
  font-size: clamp(2rem, calc(0.5vw + 2.000rem), 2.8rem);
  letter-spacing: 0.3em;
  color: #fff;
  border-bottom: none;
  padding: 0;
  margin: 0;
}

.share-icon {
  display: flex;
  gap: 10em;
}

.share img {
  width: clamp(30px, 4rem, 50px);
  transition: ease-in-out;
}

.share img:hover {
  transform: scale(1.2);
}

@media screen and (max-width: 900px) {
  #overview {
    margin: 30px 1em;
  }

  #overview p {
    margin: 1.5em;
    padding-bottom: 1em;
  }

  .share {
    justify-content: space-around;
  }

  #overview .share p {
    display: none;
  }

  .share-icon img {
    width: 50px;
  }

  .share img:hover {
    transform: none;
  }
}

/* 頭アニメ */
.atama {
  height: 40vh;
  position: relative;
  overflow-x: hidden;
}

.atama img {
  position: absolute;
  top: 25%;
  left: 0;
  /* transform: translateY(-50%); */
  height: 20vh;
  animation: furafura 18s linear infinite;
  will-change: transform;
}

@keyframes furafura {
  0% {
    transform: rotate(-10deg) translateX(0vw);
  }

  30% {
    transform: rotate(12deg) translateX(20vw);
  }

  60% {
    transform: rotate(-7deg) translateX(40vw);
  }

  80% {
    transform: rotate(5deg) translateX(60vw);
  }

  98% {
    transform: rotate(1deg) translateX(80vw);
  }

  100% {
    transform: rotate(-8deg) translateX(100vw);
  }
}

.atama img:hover {
  opacity: .8;
}

@media (max-width: 600px) {
  .atama img {
    width: 185px;
  }

  .atama img:hover {
    opacity: 1;
  }
}

#backToTop {
  position: fixed;
  bottom: 10px;
  right: 15px;
  height: 80px;
  width: 80px;
  border-radius: 50px;
  color: #cfe8df;
  background-color: #024f60;
  overflow: visible;
  border: 3px solid #cfe8df;
  text-align: center;
  cursor: pointer;
  opacity: .75;
  display: none;
}

#backToTop .bar {
  display: flex;
  width: 20px;
  height: 3px;
  border-radius: 30px;
  background-color: #fff;
}

#backToTop .bar:nth-child(1) {
  transform: rotate(-45deg) translate(10px, 10px);
}

#backToTop .bar:nth-child(2) {
  transform: rotate(45deg) translate(17px, -20.8px);
}

#backToTop p {
  font-size: 1.8rem;
  transform: translateY(8px);
  letter-spacing: .1em;
}

.credit {
  text-align: center;
  color: #fff;
  letter-spacing: 0.1em;
  margin: 50px 30px;
}

#footer {
  width: 100%;
  margin: 0 auto;
  background-color: #fff;
}

.copyright {
  text-align: center;
  padding: 20px;
  color: #010c0f;
}