/* ページ共通 */
.post-content {
  padding-top: 13rem;
  position: relative;
  background-color: #E6F6FF;
}
.post-content::before,
.post-content::after{
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  position: absolute;
  top: 0;
}
.post-content::before {
  border-width: 200px 200px 0 0;
  border-color: #FF8AAE transparent transparent transparent;
  left: 0;
}
.post-content::after {
  border-width: 0 200px 200px 0;
  border-color: transparent #FFF89A transparent transparent;
  right: 0;
}
.post-main article {
  padding: 4rem;
  background-color: #FFF;
}
.page-mv {
  height: 35rem;
  background-image: url(../images/page_mv.jpg);
}
.page-mv h1 {
  margin-top: 6rem;
  text-align: center;
}
@media screen and (max-width:980px) {
  .post-content {
    padding-top: 8rem;
  }
  .post-content::before {
    border-width: 10rem 10rem 0 0;
  }
  .post-content::after {
    border-width: 0 10rem 10rem 0;
  }
  .post-main article {
    padding: 3rem 2rem;
  }
}
/* 見出し */
.post-main h1 {
  font-size: 3.2rem;
  padding: 1rem 0;
  border-top: 3px solid #9ADCFF;
  border-bottom:  3px solid #9ADCFF;
  margin-bottom: 4rem;
}
.post-main h2 {
  font-size: 2.4rem;
  border-bottom: 2px solid #9ADCFF;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  padding-bottom: 0;
  margin-bottom: 2.5rem;
}
.post-main h2::before {
  content: "";
  display: inline-block;
  background-image: url(../images/ic-headline.svg);
  height: 1em;
  width: 1em;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  margin-right: 0.5rem;
}

.post-main h3 {
  font-size: 2rem;
  margin-top: 6rem;
  margin-bottom: 1rem;
  padding-top: 0;
  padding-left: 0.5rem;
  border-left: 6px solid #9ADCFF;
}

.post-main h4 {
  padding-top: 4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.post-main h4::before {
  content: "";
  display: inline-block;
  width: 1em;
  height: 1em;
  background-color: #9ADCFF;
  border-radius: 100vw;
}
.post-main h2 + h3 {
  margin-top: 0;
}
.post-main h3 + h4 {
  padding-top: 0; 
}
@media screen and (max-width:980px) {
  .post-main h1 {
    font-size: 2.4rem;
    margin-bottom: 3rem;
  }
  .post-main h2 {
    font-size: 2rem;
    padding-top: 4rem;
    margin-bottom: 2rem;
  }  
  .post-main h3 {
    font-size: 1.8rem;
    margin-top: 4rem;
    margin-bottom: 1rem;
  }
  .post-main h4 {
    padding-top: 3rem;
  }
}
/* 余白調整 */
.single-main img,
.single-main table,
.single-main ul,
.single-main ol {
  margin: 4rem 0;
}
/* そのたタグ */
.single-main > ul {
  padding: 3rem 2.5rem;
  border-radius: 3rem;
  list-style-type: disc;
  border: 2px solid #9ADCFF;
}
.single-main li {
  margin-left: 2rem;
}
.single-main a {
  border-bottom: 1px solid #33B8FF;
  color: #33B8FF;
}
@media screen and (max-width:980px) {
  .single-main > ul {
    padding: 2rem;
    border-radius: 2rem;
  }
}
/* ナビゲーション */
.single-nav-btn {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  justify-items: center;
  padding: 4rem 0;
  filter: drop-shadow(0 0 10px rgba(0,0,0,0.1));
}
.single-nav-btn li {
  padding: 1em 0;
}
.single-nav-btn a {
  padding: 1em 2em;
  background-color: #FFF;
  border: 2px solid #33B8FF;
  border-radius: 1rem;
  color: #33B8FF;
}
.single-nav-btn_prev {
  grid-column: 1;
}
.single-nav-btn_archive {
  grid-column: 2;
}
.single-nav-btn_next {
  grid-column: 3;
}
@media screen and (max-width:980px) {
  .single-nav-btn {
    gap: 0;
    padding: 4rem 0;
    filter: drop-shadow(0 0 5px rgba(0,0,0,0.1));
  }
  .single-nav-btn a {
    padding: 0.5em 1em;
  }
}
/* 一覧 */
.post-list {
  border-top: 1px solid #DDDDDD;
  margin-top: 4rem;
}
.post-list .st-article {
  border-bottom: 1px solid #DDDDDD;
}
.post-list a {
  display: flex;
  gap: 2em;
  padding: 1rem 0;
}
.post-list .st-article_time,
.post-list .st-article_title {
  font-size: 1.6rem;
  padding-top: 0;
  padding-bottom: 0;
}
/* 目次プラグインの上書き */
div#ez-toc-container {
  min-width: 60%;
  margin: 4rem auto;
  padding: 3rem;
}
div#ez-toc-container ul {
  border: none;
  border-radius: 0;
}
div#ez-toc-container p.ez-toc-title {
  font-weight: bold;
}
div#ez-toc-container a {
  margin-top: 0.5em;
  display: inline-block;
  border: none;
}
div#ez-toc-container ul.ez-toc-list a:hover {
  color: #33B8FF;
}
@media screen and (max-width:680px) {
  div#ez-toc-container {
    min-width: 90%;
    padding: 2rem;
  }
}