.header{
    position: relative;
}
.main_container {
    width: max(700px, 80%);
    margin: 0 auto;
}
.main-section {
    margin: 2vw auto 0 auto;
}
.main-label {
    background: var(--clr-green);
    color: var(--clr-wh);
    font-size: 26px;
    font-weight: bold;
    text-align: center;
    padding: 1rem 0;
}

/* --- パンくずメニュー --- */
.breadcrumb {
    font-size: 16px;
    margin: 0;
    color: var(--clr-fontgray);
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 10px 0 0 10px;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "＞";
    margin: 0 0 0 10px;
    font-size: 0.95em;
}

.breadcrumb a {
    transition: color 0.18s;
    color: var(--clr-fontgray);
}

.breadcrumb a:hover {
    color: var(--clr-green);
}
/* --- 記事 --- */
.container-main {
    display: flex;
    gap: 4vw;
    width: max(700px, 90%);
    margin: 0 auto;
    align-items: flex-start;
    padding-top: 100px;
}
.content {
    flex: 1 1 0;
}
.post-content p{
    font-size: 18px;
    font-weight: 400;
    line-height: 2em;
}
.post-media{
    display: flex;
    flex-direction: column;
    text-align: center;
    line-height: 1em;
    font-size: 18px;
    margin:0 auto;
}

.post-media img{
    display: block;
    width:100% ;
    height: auto;
    margin: 10px 0;
    padding-top:20px ;
}
.post-media iframe {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    padding-top:20px;
}

/* --- ナビ --- */
.article-pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(16px, 4vw, 40px);
    align-items: start;
    position: relative;
    margin: 48px 0;
}

.article-pager::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
}

.pager-card {
    display: block;
    color: inherit;
    text-decoration: none;
}

.pager-label {
    display: inline-block;
    font-size: 14px;
    margin-bottom: 4px;
    color: var(--clr-fontgray);
}

.pager-card.prev .pager-label {
    text-align: right;
    float: right;
}

.pager-figure {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: 8px;
}

.pager-figure>img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
    transform-origin: center;
}

.pager-card:hover .pager-figure>img {
    transform: scale(1.06);
}
.pager-title {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    text-align: center;
    padding: 12px 5px;
    color: var(--clr-fontbl);
    background: color-mix(in oklab, var(--clr-wh) 70%, transparent);
}

/* --- サイドバー --- */
.sidebar {
    width: 380px;
}
.sidebar-latest {
  width: 100%;
  margin: 0 auto;
}
.sidebar-title {
  width:100% ;
  margin-bottom: 10px;
  border-bottom: 3px solid var(--clr-lightgreen);
  display: inline-block;
  padding-bottom: 0.25em;
  font-size: 20px;
  font-weight: 400;
}
.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 1em;
}
.sidebar-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-bottom: 1px solid var(--clr-fontgray);
}
.sidebar-item:last-child { border-bottom: none; }
.sidebar-thumb img {
  width: 110px;
  height: 80px;
  object-fit: cover;
  display: block;
  padding:0 0 10px 0;
}
.sidebar-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.sidebar-item-title {
  font-size: 16px;
}
.sidebar-item-date {
  font-size: 14px;
  margin-top: 15px;
  letter-spacing: 0.04em;
}
.sidebar-btn {
    align-self: center;
    display: inline-block;
    font-size: 14px;
    padding: 0.6em 2.2em;
}
.sidebar-btn a{
    color: var(--clr-fontbl);
}

/* --- PC用スタイル --- */
@media (min-width: 768px) {
.flex{
    display:flex;
    gap:10px;
}
.flex-item{
    flex: 1;
}

}
/* --- モバイル用スタイル --- */
@media (max-width: 767px) {
.main_container {
        width: 95vw;
    }
.container-main {
        display: flex;
        flex-direction: column;
        gap: 4vw;
        width:95vw;
        margin: 0 auto;
        align-items: flex-start;
        padding-top: 50px;
    }

.article-pager {
    grid-template-columns: 1fr;
}    
.article-pager::before {
    left: 0;
    right: 0;
    top: auto;
    height: 2px;
    width: auto;
    transform: none;
}   
.pager-card.prev .pager-label {
    float: none;
    text-align: left;
}

.sidebar {
    width: 90vw;
    margin:0 auto;
}
.sidebar-latest { width: 100%; }
.sidebar-thumb img { width: 88px;}
.sidebar-item-title { font-size: 14px; }
.sidebar-item-date { font-size: 12px; }
}