@charset "utf-8";
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500&display=swap');

/*----------------------
 common
 ----------------------*/

html {
  font-size: 62.5%;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.1em;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  width: 100vw;
  height: 100vh;
  background: url("../images/bg.png") no-repeat;
  -webkit-background-size: cover;
  background-size: cover;
  content: "";
}

a {
  color: white;
}

a:hover {
  opacity: 0.75;
}

.inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 10px;
}

.btn_entry a {
  display: inline-block;
  font-size: 1.5rem;
  line-height: 2.2;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 4px 22px;
  border: 2px solid #fff;
  margin-top: 33px;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn_entry a::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -4px;
  width: 200%;
  height: 120%;
  background: linear-gradient(90deg, #ffffffff, #ffffffff, #ffffff00);
  transform: translate3d(-100%, 0, 0);
  transition: transform 450ms;
  transition-timing-function: cubic-bezier(.165, .84, .44, 1);
  z-index: -1;
}

.btn_entry a:hover {
  color: #1f2933;
  opacity: 1;
}

.btn_entry a:hover::before {
  transform: translate3d(0, 0, 0);
}

.section_ttl {
  font-size: 2rem;
  line-height: 2;
  letter-spacing: 0.08em;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.3em;
  text-decoration-thickness: 1px;
  width: 23%;
}

/* menu
------------------------------------- */


/* menu_btn close */

.menu_btn {
  position: fixed;
  top: 50%;
  left: 21px;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  z-index: 10;
  transition: opacity 0.5s;
}

.menu_btn.inactive {
  opacity: 0 !important;
}

.menu_btn:hover {
  opacity: 0.75;
}

.menu_btn .line {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 36px;
  height: 2px;
  background: #fff;
  box-shadow: rgba(46, 62, 60, 0.5) 0px 0px 6px;
  mix-blend-mode: multiply;
}

.menu_btn .line_01 {
  top: 23px;
  left: 5px;

}

.menu_btn .line_02 {
  top: 12px;
  left: 5px;

}

.menu_btn .line_03 {
  top: 35px;
  left: 5px;
}


/* menu_btn open */

.menu_btn_nav {
  position: absolute;
  top: 30px;
  left: 26px;
  transform: translateY(-50%);
  width: 35px;
  height: 35px;
  cursor: pointer;
  background: none;
  z-index: 10;
  transition: opacity 0.5s;
}

.menu_btn_nav:hover {
  opacity: 0.75;
}

.menu_btn_nav .line {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  height: 1px;
  background: #fff;
  box-shadow: rgba(46, 62, 60, 0.5) 0px 0px 6px;
  mix-blend-mode: multiply;
}

.menu_btn_nav .line {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 36px;
  height: 2px;
  background: #fff;
  box-shadow: rgba(46, 62, 60, 0.5) 0px 0px 6px;
  mix-blend-mode: multiply;
}

.menu_btn_nav .line {
  box-shadow: none;
  mix-blend-mode: normal;
}

.menu_btn_nav .line_01 {
  top: 22px;
  transform: rotate(45deg);
}

.menu_btn_nav .line_02 {
  opacity: 0;
}

.menu_btn_nav .line_03 {
  top: 22px;
  transform: rotate(-45deg);
}


/* nav
------------------------------------- */

header {
  z-index: 1000;
}

.nav {
  width: 313px;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  position: fixed;
  top: 0;
  left: -313px;
  padding-left: 26px;
  font-size: 2.3rem;
  line-height: 2;
  letter-spacing: 0.08em;
  z-index: 15;
  transition: left 0.5s cubic-bezier(0.33, 1, 0.68, 1);
}

.nav_inner {
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.nav.open {
  left: 0;
}

.nav_list a {
  color: #fff;
}

.link_website {
  text-decoration: underline;
  padding-top: 62px;
}

.mv_logo {
  position: fixed;
  top: 24px;
  left: 24px;
  transition: opacity 0.3s cubic-bezier(0.33, 1, 0.68, 1);
  z-index: 10;
}

.mv_logo.inactive {
  opacity: 0;
}

.mv_logo a {
  display: block;
}


/* mv
------------------------------------- */

.mv {
  width: 100%;
  height: 100vh;
  position: relative;
}

.mv_ttl {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.btn_lang {
  position: fixed;
  top: 24px;
  right: 40px;
  display: flex;
  align-items: center;
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.btn_lang span {
  padding: 0 5px;
}

.btn_lang .active {
  opacity: 0.3;
  pointer-events: none;
}

.scroll {
  position: absolute;
  bottom: 1%;
  left: 50%;
  transform: translate(-50%, -50%);
}


/* concept
------------------------------------- */

.concept {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 64px 0 0 13px;
}

.concept_txt {
  text-align: center;
  margin-top: 75px;
  font-size: 1.8rem;
  letter-spacing: 0.1em;
  line-height: 2;
}

.concept_txt span {
  display: inline-block;
}

.concept_txt::before,
.concept_txt::after {
  content: "";
  display: inline-block;
  width: 114px;
  height: 1px;
  background-color: #fff;
}

.concept_txt::before {
  margin-bottom: 41px;
}

.concept_txt::after {
  margin-top: 58px;
}


/* about
------------------------------------- */

.about {
  margin-top: 100px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 91%;
  margin-left: 10%;
}

.about_box {
  width: 77%;
  letter-spacing: 0.1em;
}

.about_box_txt {
  text-align: justify;
}

.about_box_link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  padding-top: 15px;
}

.about_box_list {
  display: flex;
  padding-top: 40px;
}

.about_box_list li:not(:last-child) {
  padding-right: 24px;
}

.about_box_member {
  font-size: 1.4rem;
  letter-spacing: 0.12em;
  line-height: 1.78;
  padding-top: 20px;
}


/* gallery
------------------------------------- */

.section {
  margin-top: 100px;
  display: flex;
  width: 91%;
  margin-left: 10%;
  justify-content: space-between;
  align-items: flex-start;
}

.gallery_box {
  width: 77%;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.gallery_box_txt {
  font-size: 1.8rem;
  line-height: 1.8;
}

.gallery_box_txt span {
  font-weight: 300;
  font-size: 1.5rem;
  line-height: 2.2;
}

.gallery_box_date {
  font-size: 2rem;
  line-height: 2.1;
}

.gallery_box_caption {
  font-size: 1.5rem;
  line-height: 33px;
  line-height: 2.2;
}

.gallery_box_caption span {
  font-weight: 300;
}


/* talk
------------------------------------- */

.talk {
  margin-top: 84px;
}

.talk_wrapper {
  width: 77%;
}

.talk_box::after {
  content: "";
  display: inline-block;
  width: 91%;
  height: 1px;
  background-color: #fff;
  position: relative;
  top: -30px;
  left: -24px;
}

.talk_box_txt {
  font-size: 1.8rem;
  line-height: 1.8;
  font-weight: 500;
}

.info_box {
  padding-bottom: 80px;
}

.info_box:not(:last-child)::after {
  content: "";
  display: inline-block;
  width: 91%;
  height: 1px;
  background-color: #fff;
  position: relative;
  top: 53px;
  left: -24px;
}

.info_box_number {
  font-weight: 500;
  font-size: 2.3rem;
  line-height: 2.3;
  margin-top: 81px;
}

.info_box_ttl {
  font-weight: 300;
  font-size: 3rem;
  line-height: 1.8;
  text-indent: -0.6em;
  margin-top: -6px;
}

.info_box_date {
  font-weight: 300;
  font-size: 2.4rem;
  line-height: 2, 2;
}

.info_box_guest {
  margin-top: 15px;
}

.info_box_guest .mgl {
  margin-left: 4.2em;
}

.info_box01 .overview_box_img {
  padding-top: 5px;
}

.info_box02 .info_box_number {
  margin-top: 34px;
}

.info_box02 .info_box {
  padding-bottom: 34px;
}

.info_box02_2 .info_box_number {
  margin-top: 34px;
}

.info_box02_2 .overview_box {
  flex-direction: row;
}

.info_box02_2 .info_box {
  padding-bottom: 34px;
}

.info_box02_2 .overview_box_txt {
  padding: 0 0 0 27px;
}

.info_box03 .info_box_number {
  margin-top: 36px;
}

.info_box04 .info_box_number {
  margin-top: 36px;
}


/* overview
------------------------------------- */

.overview_box {
  width: 85%;
  margin-top: 25px;
  display: flex;
  justify-content: space-between;
  flex-direction: column;
}

.overview_box_img {
  display: flex;
  padding-top: 5px;
}

.overview_box_img li {
  padding-right: 20px;
}

.overview_box_txt {
  font-weight: 300;
  font-size: 1.3rem;
  line-height: 1.8;
  text-align: justify;
  letter-spacing: 0.08em;
  padding-top: 20px;
}

.info_box01 .overview_box {
  flex-direction: row;
}

.info_box01 .overview_box_txt {
  padding: 0 0 0 27px;
}


/* exhibition
------------------------------------- */

.exhibition {
  margin: 113px 0 0 3%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.exhibition_ttl {
  display: inline-block;
  width: 100%;
  text-align: center;
}

.exhibition_list01 {
  width: 74%;
  display: flex;
  flex-flow: row wrap;
  align-items: center;
  margin: 21px 0 0 0;
  font-size: 1.8rem;
  letter-spacing: 0.08em;
}

.exhibition_list01 .event_place {
  padding-left: 1em;
}


.exhibition_list01 dt {
  flex-basis: 17%;
  padding-bottom: 30px;
  padding: 9px 0 0 0;
  text-align: right;
  font-size: 1.5rem;
}

.exhibition_list01 dd {
  flex-basis: 83%;
  padding: 9px 0 0 21px;
}

.map {
  margin: 54px 0 0 -30px;
  -webkit-filter: grayscale(100%);
  -moz-filter: grayscale(100%);
  -o-filter: grayscale(100%);
  -ms-filter: grayscale(100%);
  filter: grayscale(100%);
  overflow: hidden;
  padding-bottom: 43.6%;
  width: 726px;
  height: 436px;
  position: relative;
}

.map iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.exhibition_list02 {
  width: 500px;
  margin: 88px 0 0 75px;
}

.exhibition_list02 p+p {
  text-indent: -3.3em;
  padding-left: 3.3em;
}

.exhibition_list02.lang_en p+p {
  text-indent: 0;
  padding-left: 0;
}

.exhibition_list03 {
  width: 500px;
  margin: 27px 0 0 75px;
}

.link_target {
  display: inline-block;
  position: relative;
  top: -80px;
}


/* footer
------------------------------------- */

footer {
  background-color: #000;
  margin-top: 640px;
  font-size: 1.6rem;
  letter-spacing: 0.12em;
}

footer small {
  letter-spacing: 0.12em;
  font-size: 1.6rem;
}

.footer_inner {
  max-width: 1040px;
  padding: 0 20px;
  height: 90px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media screen and (max-width:1040px) {
  .mv_ttl {
    text-align: center;
  }

  .mv_ttl img {
    width: 90%;
    height: auto;
  }

  .about {
    margin: 100px auto 0;
  }

  .section {
    margin: 100px auto 0;
  }

  .exhibition_list02 {
    margin: 80px auto 0;
  }

  .exhibition_list03 {
    margin: 27px auto 0;
  }

  .overview_box {
    width: 100%;
  }

  .info_box:not(:last-child)::after {
    width: 100%;
    left: 0;
  }

  .exhibition_list01 {
    width: 100%;
    max-width: 726px;
    margin: 21px 0 0 0;
  }

  .map {
    width: 100%;
    max-width: 726px;
    height: auto;
  }

  .talk_box::after {
    width: 100%;
    left: 0;
}
}

.lang_en {
  display: none;
}

.info_box_ttl.lang_en {
  text-indent: 0;
}

.exhibition_list01 .lang_en .event_place {
  padding-left: 0;
}