:root{
  --container: 1030px;
  --gutter: 32px;

  --main: #015C4B;
  --bg: #E8DEBB;

  --text: #363636;
  --engtxt:"Figtree", sans-serif;

  --fs-body:16px;
  --fs-sub:14px;
  --fs-lead:24px;
  --fs-ttl-jp:30px;
  --fs-ttl-en:38px;
  --fs-body-en:24px;

  --sec-space:80px;
  --min-space:12px;
  --mid-space:24px;
  --lar-space:36px;

  --line:5px;
}

*{ box-sizing: border-box; margin: 0; padding: 0; }
html,body{ overflow-x: hidden; overflow-y: auto; scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: YakuHanJP, "Zen Kaku Gothic New", sans-serif;;
  color: var(--text);
  font-weight: 400;
  line-height: 1.8;
  background: var(--bg);
  font-size: var(--fs-body);
}
img{ max-width: 100%; height: auto; display:block; }
a{ color: var(--main); text-decoration: underline; font-weight: 600; }
ul{ margin:0; padding:0; list-style: none; }

.main{
  width: min(var(--container), 100% - (var(--gutter) * 2));
  margin: 0 auto;
}
.section {
  padding: var(--sec-space) 0;
  border-bottom: var(--main) var(--line) solid;
}
.section:last-child {
  border-bottom: none;
}

.site-header{
  background-color: #000;
  padding: var(--min-space) 0;
}
.site-header__nav-list {
  display: flex;
  justify-content: center;
}
.site-header__nav-list li a {
  padding: 0 var(--mid-space);
  text-decoration: none;
  color: #FFF;
  border-left: var(--bg) var(--line) solid;
  line-height: 1;
}
.site-header__nav-list li:last-child a {
  border-right: var(--bg) var(--line) solid;
}

.section__title {
  font-weight: 900;
  color: var(--main);
  display: flex;
  justify-content: flex-start;
  align-items: baseline;
}
.section__title-en {
  font-size: var(--fs-ttl-en);
  letter-spacing: 0.1em;
  line-height: 1;
}
.section__title-jp {
  font-size: var(--fs-ttl-jp);
  line-height: 1;
  font-weight: 600;
  letter-spacing: 0.25em;
}
.section__title-sep {
  width: var(--line);
  display: block;
  height: 28px;
  background-color: var(--main);
  margin: 0 var(--lar-space);
}

#news {
  padding-top: calc(var(--sec-space)/2);
}

.news__item,
.overview__row {
  display: flex;
  justify-content: flex-start;
  margin-top: var(--mid-space);
}
.news__date {
  color: var(--main);
  padding-right: var(--mid-space);
  font-weight: 700;
}
.section__lead {
  font-size: var(--fs-lead);
  font-weight: 700;
  margin-top: var(--mid-space);
}
.overview__row {
  padding-left: var(--mid-space);
  border-top: rgba(0, 0, 0,0.25) 1px solid;
  padding-top: var(--mid-space);
  margin-top: var(--mid-space);
}
.overview__row .overview__term {
  padding-right: calc(var(--mid-space) * 2);
  min-width: 20%;
}
.term__text {
  border-left: var(--line) var(--main) solid;
  padding-left: 2em;
  color: var(--main);
  font-weight: 700;
}
.overview__sub {
  font-size: var(--fs-sub);
  margin-top: var(--mid-space);
}
.notes__heading {
  margin: var(--lar-space) 0 var(--min-space);
}
.notes__heading:first-child {
  margin-top: var(--mid-space);
}
.notes__item {
  list-style: disc;
  margin-left: 2em;
}
footer {
  background-color: #FFFFFF;
  padding: var(--mid-space) var(--mid-space);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 768px){
  :root{
    --gutter: 24px;

    --fs-body:14px;
    --fs-sub:0.75rem;
    --fs-lead:1rem;
    --fs-ttl-jp:1.6rem;
    --fs-ttl-en:1.6rem;
    --fs-body-en:1.4rem;

    --sec-space:34px;
    --min-space:6px;
    --mid-space:12px;
    --lar-space:18px;

    --line:3px;
  }
  .site-header__nav-list li a {
    font-size: 11px;
  }
  main {
    width: 100% !important;
  }
  .section {
    width: min(var(--container), 100% - (var(--gutter) * 1.5));
    margin-left: auto;
    margin-right: auto;
  }
  .overview__desc ul li {
    margin-bottom: 6px;
    word-break:break-all;
  }
  .overview__desc ul li a {
    display: block;
  }
  .overview__desc ul li:last-child {
    margin-bottom: 0;
  }
  .section__title-sep{
    height: 18px;
  }
  .section__title-ja {
    font-size: var(--fs-lead);
  }
  .news__item, .overview__row {
    flex-flow: column;
    gap: 8px;
  } 
  .term__text {
    padding-left: 1em;
    margin-bottom: 8px;
    font-size: var(--fs-lead);
  }
  .notes__item{
    font-size: 12px;
  }
  footer a {
    width: 50%;
  }
}
@media (max-width: 520px){
  .header__inner{ height: 64px; }
  .header__logo img{ height: 28px; }
  .btn--large{ width: 100%; }
  .intro__illust{ position: static; margin: 12px auto; }
}