@charset "UTF-8";
/*********************************
preset variables
*********************************/
:root {
  /* text preset */
  --fontSize: 1rem;
  --linkColor: #027bc7;
  --textColor: #333;
  /* color preset */
  --mainColor: #027bc7;
  --mainDarkColor: #1d2088;
  --mainLightColor: #cce5f4;
  --bgColor: #f2f5f8;
  /* width preset */
  --gutter: 1.3rem;
  --gap: 3rem;
  --wrapperWidth: 1160px;
  --contentWidth: 960px;
  --headerHeight: 70px;
}

body {
  padding-top: var(--headerHeight);
  font-size: var(--fontSize);
  line-height: 1.8;
  letter-spacing: 0.05rem;
  text-align: justify;
  color: var(--textColor);
  background-color: var(--bgColor);
  align-items: center;
}
.site-wrapper {
  position: relative;
  width: 100%;
  max-width: var(--wrapperWidth);
  margin: 0 auto;
  background-color: #fff;
  box-shadow: 0 0 10px 3px #ccc;
  overflow: hidden;
}
.centering {
  width: 100%;
  max-width: var(--contentWidth);
  margin: 0 auto;
}
.text-spacing {
  letter-spacing: 0.05rem !important;
}
.f-smaller {
  font-size: smaller;
}
.text-en {
  -webkit-hyphens: auto;
  -ms-hyphens: auto;
  hyphens: auto;
  overflow-wrap: break-word;
  text-align: start;
}
ul.marker-l li {
  list-style-type: "●";
  padding-inline-start: 1ch;
}
.indent-1 {
  text-indent: 1.05rem;
}

/** header */
header {
  background: #fff;
  border-top: 10px solid var(--mainColor);
  box-shadow: 0 0 10px 0 rgb(102, 102, 102);
}
.brand-aist {
  display: none;
}
.toggler {
  background-color: var(--mainLightColor) !important;
}
.gnav-header {
  width: 100%;
  justify-content: space-between;
}
.gnav-body-header {
  background-color: var(--mainLightColor);
}
.gnav-body-header h1 {
  font-size: 1rem;
  font-weight: bold;
}
.gnav-body li {
  width: 100%;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid #ccc;
}
.gnav-body li:hover {
  background: #eee;
  text-decoration: none;
}
.gnav-body li.active {
  background: #eee;
  text-decoration: none;
}
.gnav-body li a {
  font-weight: bold;
  color: var(--textColor) !important;
  text-decoration: none;
}
.gnav-body li a > span::before {
  content: ' ';
}
.gnav-body li a > span {
  font-size: 0.75rem;
  font-weight: normal;
  color: #999;
}
li.nav-pamphlet {
  background-color: #B3DCF1;
}
li.nav-pamphlet a > span {
  color: var(--mainColor);
}
li.nav-memberonly a span.nav-memberonly-sp {
  font-size: 1rem;
  font-weight: bold;
  color: var(--textColor);
}
img.nav-memberonly-pc {
  display: none;
}
a.lang-switch,
button.lang-switch {
  display: block;
  position: static;
  padding: 1rem;
  background: var(--mainColor);
  color: #fff;
  text-decoration: none;
}
button.lang-switch {
  width: 100%;
  letter-spacing: 0.05rem;
  border: none;
}
a.lang-switch:hover,
button.lang-switch:hover {
  text-decoration: underline;
}

img.eyecatch {
  display: block;
  width: 100%;
}
.sp-none {
  display: none !important;
}
.br-display {
  display: none;
}
.pagetitle {
  display: grid;
  place-items: center;
  padding: 1rem;
  background: var(--mainColor);
}
.pagetitle h1 {
  margin-bottom: 0;
  font-size: 1.5rem;
  color: #fff;
}

.breadcrumb {
  display: block;
  margin-bottom: 0;
  padding: 0.3rem 1rem;
  background-color: var(--mainLightColor);
}
.breadcrumb ol {
  margin-bottom: 0;
}
.breadcrumb ol li {
  display: inline-block;
}
.breadcrumb ol li:not(:last-child)::after {
  content: ">";
  margin: 0 0.8rem;
}

/** main */
main {
  padding: 2rem 1rem;
}
main h2 {
  margin-bottom: 1rem;
  padding-bottom: 1.2rem;
  font-weight: bold; 
  border-bottom: 2px solid #000000;
}
main h2 > span {
  margin-left: 1.5rem;
  font-size: 1rem;
  font-weight: normal;
}
main h3 {
  padding: 0.5rem 1rem;
  background-color: #4da2d8;
  color: #ffffff;
  font-weight: bold;
}
main h4 {
  font-weight: bold;
}
main h4::before {
  display: inline-block;
  content: "";
  width: 8px;
  height: 1.5rem;
  background-color: var(--mainColor);
  margin-right: 0.5rem;
  vertical-align: middle;
  margin-bottom: 4px;
}

.w-ss-100 {
  width: 100% !important;
}

dl.news dt {
  margin-bottom: 0.8rem;
  color: var(--mainColor);
}
dl.news dd {
  margin-bottom: 0;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid #c4c4c4;
}
dl.news dd span {
  display: block;
  font-weight: bold;
}
dl.news + a {
  display: block;
  width: fit-content;
}

.events dt {
  padding-left: 0.5rem;
  background-color: #4da2d8;
  color: #fff;
}

/** footer */
footer {
  position: relative;
}
#footer-nav {
  display: none;
}
footer .footer-body {
  padding: 0.5rem 1rem;
}
footer .footer-bland {
  margin-bottom: 1rem;
}
footer .copyright {
  width: 100%;
  margin-bottom: 0;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  text-align: center;
  background-color: var(--mainColor);
  color: #fff;
}

@media (min-width: 576px) {
  body {
    padding-top: 96px;
  }
  .w-ms-45 {
    width: 45% !important;
  }
}

@media (min-width: 768px) {
  body {
    padding-top: 96px;
  } 
  .w-md-35 {
    width: 35% !important;
  }
  .w-md-45 {
    width: 45% !important;
  }
  .w-md-50 {
    width: 50% !important;
  }
  .w-md-75 {
    width: 75% !important;
  }
  .w-md-85 {
    width: 85% !important;
  }
}

@media (min-width: 992px) {
  body {
    padding-top: 0;
  }
  header {
    position: relative !important;
  }
  .brand-aist {
    display: block;
    padding-top: 1.1875rem;
    padding-bottom: 0.3125rem;
  }
  .sp-none {
    display: block !important;
  }
  .pc-none {
    display: none !important;
  }
  .gnav-container {
    display: block !important;
    max-width: var(--contentWidth);
    padding: 0 !important;
  }
  .gnav-body {
    position: relative;
    border-right: 1px solid #ccc;
  }
  .gnav-body li {
    padding: 1rem 0 0.5rem;
    border-bottom: none;
    border-left: 1px solid #ccc;
  }
  .gnav-body li a {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem !important;
    line-height: 1.5;
  }
  .br-display {
    display: block;
  }
  a.lang-switch,
  button.lang-switch {
    display: block;
    position: absolute;
    top: -6rem;
    right: 0;
    z-index: 2;
    padding: 0 3.75rem;
    background: var(--mainColor);
    color: #fff;
  }
  button.lang-switch {
    width: unset;
  }
  li.nav-memberonly {
    width: 4rem;
    text-align-last: center;
  }
  .nav-memberonly-sp {
    display: none;
  }
  li.nav-memberonly a > span {
    font-size: 0.5rem;
    line-height: 1;
  }
  img.nav-memberonly-pc {
    display: block;
    width: 1.5rem;
    padding-bottom: 0.5rem;
  }

  main h2 > span {
    font-size: 1.5rem;
  }
  .w-lg-25 {
    width: 25% !important;
  }
  .w-lg-45 {
    width: 45% !important;
  }
  .w-lg-50 {
    width: 50% !important;
  }
  .w-lg-75 {
    width: 75% !important;
  }
  .w-lg-85 {
    width: 85% !important;
  }
  .w-lg-100 {
    width: 100% !important;
  }

  .events dl {
    display: grid;
    grid-template-columns: max-content 1fr;
    margin-bottom: 0;
  }
  .events dt {
    background-color: var(--mainColor);
    color: #fff;
    border-bottom: 1px solid var(--mainLightColor);
    padding: 0.2rem 0.8rem;
    font-weight: 500;
  }
  .events dt:last-of-type,
  .events dd:last-of-type {
    grid-column: 1 / -1;
  }
  .events dt,
  .events dd {
    line-height: 1.8;
  }
  .events dd {
    padding: 0.2rem 0.5rem;
  }
  .events dd:nth-of-type(2n) {
    background-color: #efefef;
  }

  .breadcrumb ol {
    max-width: var(--contentWidth);
    margin: 0 auto;
  }

  footer #footer-nav {
    display: block;
    background: var(--mainColor);
    padding: 1.5rem 0;
  }
  footer .fnav-body {
    display: flex;
    max-width: var(--contentWidth);
    margin: 0 auto;
    border-right: 1px solid #fff;
  }
  ul.fnav-body {
    list-style: none;
    padding-left: 0;
  }
  footer .fnav-body li {
    width: 100%;
    border-left: 1px solid #fff;
    font-size: 0.85rem;
  }
  footer .fnav-body li a {
    display: grid;
    place-items: center;
    padding: 0 0.5rem;
    color: #fff;
    text-decoration: none;
  }
  footer .fnav-body li a:hover {
    text-decoration: underline;
  }
  footer .footer-body {
    display: flex;
    max-width: var(--contentWidth);
    justify-content: space-between;
    margin: 0 auto;
    padding: 1rem 0;
    font-size: 0.875rem;
  }
  footer .footer-bland {
    margin-bottom: 0;
  }
  footer .footer-body .footer-info {
    margin-left: 1rem;
    text-align: right;
  }
  footer .copyright {
    margin-bottom: 0;
    padding: 1rem;
    font-size: 0.875rem;
    color: var(--textColor);
    background-color: transparent;
  }
}

/** research-member.html */
.tab-menu {
  margin-bottom: 0;
  padding-left: 0;
  list-style: none;
}
.tab-button {
  padding: 0.5rem 0;
  text-align: center;
  color: var(--mainColor);
  border: 3px solid transparent;
  border-color: #e9ecef #e9ecef transparent;
  background-color: rgba(0,0,0,0.05);
}
.tab-button:hover {
  isolation: isolate;
  border-color: #e9ecef;
  cursor: pointer;
}
.tab-button.active {
  color: #fff;
  border-color: var(--mainColor);
  background-color: var(--mainColor); 
}
.tab-contents {
  padding: 1rem;
  border: 3px solid var(--mainColor);
}
.photo-member {
  width: 72px;
  height: 72px;
  margin-right: 0.5rem;
  border-radius: 50%;
}
.neme-roman {
  font-size: smaller;
}
.ribbon,
.ribbon-l {
  position: relative;
  background-color: var(--mainColor);
  border-radius: 0;
}
.ribbon::after,
.ribbon-l::after {
  position: absolute;
  top: 0;
  right: -7px;
  width: 0px;
  height: 0px;
  border-color: var(--mainColor) transparent;
  border-width: 0.636rem 7px 0.636rem 0;
  border-style: solid;
  content: '';
}
.ribbon-l::after {
  border-width: 1rem 7px 1rem 0;
}
.centers-photo {
  max-width: 100%;
}
@media (min-width: 768px) {
  .centers-photo {
    width: 50%;
  }
}
@media (min-width: 992px) {
  .tab-menu {
    display: flex;
    flex-flow: row wrap;
    align-items: center;
  }
  .tab-button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 25%;
    height: 5rem;
    line-height: 1.5rem;
    text-align: center;
    border-top-left-radius: 0.25rem;
    border-top-right-radius: 0.25rem;
  }
  .tab-button.ac {
    width: unset;
    height: 3rem;
    padding: 0 1rem;
  }
  .tab-contents {
    margin-top: -3px;
    margin-bottom: 3rem;
    padding: 2rem;
    border-bottom-left-radius: 0.25rem;
    border-bottom-right-radius: 0.25rem;
  }
  .tab-panel {
    opacity: 0;
    transition: opacity .15s linear;
  }
  .tab-panel.show {
    opacity: 1;
  }
}

/** achivements.html */
ul.en-paper li {
  -webkit-hyphens: auto;
  -ms-hyphens: auto;
  hyphens: auto;
  overflow-wrap: break-word;
  text-align: start;
  margin-bottom: 0.75rem;
}
ul.ja-paper li {
  overflow-wrap: break-word;
  text-align: start;
  margin-bottom: 0.75rem;
}

/** .scrollToTopBtn icon */
.scrollToTopBtn {
  position: fixed;
  bottom: 5.5rem;
  right: 0.75rem;
  width: 3rem;
  padding: 0 0.5rem;
  font-size: 1.5rem;
  line-height: 3rem;
  color: #fff;
  background-color: var(--mainColor);
  border: solid 2px #fff;
  border-radius: 10%;
  cursor: pointer;
  z-index: 100;
  opacity: 0;
  -webkit-transform: translateY(100px);
  -moz-transform: translateY(100px);
  transform: translateY(100px);
  -webkit-transition: all 0.5s ease;
  -moz-transition: all 0.5s ease;
  transition: all 0.5s ease;
}
.showBtn {
  opacity: 1;
  box-shadow: 0 0 10px 0 rgb(102 102 102);
  transform: translateY(0);
}
@media (min-width: 992px) {
  .scrollToTopBtn {
    right: calc((100vw / 2) - 568px);
    bottom: 17.5rem;
  }
}