/* =========================================================
   blog.css ― ブログ一覧 / 記事詳細 / カテゴリ
   common.css → pages.css → blog.css の順に読み込む。
   ========================================================= */

/* ===== カテゴリ絞り込み ===== */
.cat-filter{display:flex; flex-wrap:wrap; gap:8px; margin:0 0 28px;}
.cat-filter a{
  display:inline-block; font-size:12.5px; text-decoration:none; padding:7px 15px;
  border-radius:999px; border:1px solid var(--border); background:var(--white); color:var(--text-sub);
  transition:background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.cat-filter a:hover{border-color:var(--gold); color:var(--navy);}
.cat-filter a.on{background:var(--navy); border-color:var(--navy); color:#fff; font-weight:700;}
.cat-filter a .n{opacity:.65; font-size:11px; margin-left:4px;}

/* ===== 記事カード ===== */
.blog-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.blog-grid > *{min-width:0;}
.blog-card{
  background:var(--white); border:1px solid var(--border); border-radius:14px; overflow:hidden;
  display:flex; flex-direction:column;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.blog-card:hover{transform:translateY(-4px); box-shadow:0 12px 28px rgba(22,58,46,.10); border-color:var(--gold);}
.blog-card-media{
  display:block; aspect-ratio:16/9; overflow:hidden; background:var(--bg);
  position:relative;
}
.blog-card-media img{width:100%; height:100%; object-fit:cover; display:block; transition:transform .5s var(--ease);}
.blog-card:hover .blog-card-media img{transform:scale(1.05);}
.blog-card-media.is-placeholder{
  background:linear-gradient(135deg,var(--navy) 0%, var(--green-mid) 100%);
  display:flex; align-items:center; justify-content:center;
}
.blog-card-media .ph-mark{
  font-size:38px; font-weight:700; color:rgba(185,168,143,.55); line-height:1;
}
.blog-card-body{padding:20px 20px 22px; display:flex; flex-direction:column; flex:1;}
.blog-card-cat{
  align-self:flex-start; font-size:11px; font-weight:700; color:var(--gold-strong);
  border:1px solid rgba(185,168,143,.6); border-radius:999px; padding:3px 10px; margin-bottom:10px;
}
.blog-card h3{font-size:15.5px; margin:0 0 8px; line-height:1.6;}
.blog-card h3 a{color:var(--navy); text-decoration:none;}
.blog-card h3 a:hover{color:var(--gold-strong);}
.blog-card-ex{font-size:12.5px; color:var(--text-sub); margin:0 0 14px; line-height:1.8; flex:1;}
.blog-card-meta{font-size:11.5px; color:var(--text-sub); margin:0;}
.blog-card-meta .dot{margin:0 2px;}

/* 一覧が空のとき */
.blog-empty{
  border:1px dashed var(--border); border-radius:14px; background:var(--white);
  padding:48px 28px; text-align:center; color:var(--text-sub); font-size:14px;
}

/* ===== ページネーション ===== */
.pager{display:flex; justify-content:center; align-items:center; gap:6px; margin-top:40px; flex-wrap:wrap;}
.pager a,.pager span{
  min-width:38px; height:38px; padding:0 10px; border-radius:8px; font-size:13px;
  display:inline-flex; align-items:center; justify-content:center; text-decoration:none;
  border:1px solid var(--border); background:var(--white); color:var(--text-sub);
  transition:background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.pager a:hover{border-color:var(--gold); color:var(--navy);}
.pager .on{background:var(--navy); border-color:var(--navy); color:#fff; font-weight:700;}
.pager .gap{border:none; background:none;}

/* ===== 記事詳細 ===== */
.post-hero .wrap{padding-bottom:40px;}
.post-hero .post-cat{
  display:inline-block; font-size:11.5px; font-weight:700; color:var(--navy);
  background:var(--gold); border-radius:999px; padding:4px 13px; margin-bottom:14px;
}
.post-hero h1{font-size:30px; line-height:1.5; margin:0 0 16px; max-width:820px;}
.post-meta{display:flex; flex-wrap:wrap; gap:14px; font-size:12.5px; color:#c9cdc2; margin:0;}
.post-meta .who{color:#fff;}

.post-layout{display:grid; grid-template-columns:minmax(0,1fr) 260px; gap:44px; align-items:start;}
.post-figure{margin:0 0 30px; border-radius:14px; overflow:hidden;}
.post-figure img{width:100%; display:block;}

/* 本文（管理画面から入る任意のHTMLに効く） */
.post-body{font-size:15px; line-height:1.95; color:var(--text);}
.post-body > *:first-child{margin-top:0;}
.post-body h2{
  font-size:21px; color:var(--navy); margin:44px 0 14px; padding:0 0 0 14px;
  border-left:4px solid var(--gold-strong); line-height:1.55; scroll-margin-top:96px;
}
.post-body h3{font-size:17px; color:var(--navy); margin:32px 0 10px; scroll-margin-top:96px;}
.post-body h4{font-size:15px; color:var(--navy); margin:24px 0 8px;}
.post-body p{margin:0 0 18px;}
.post-body b,.post-body strong{color:var(--navy);}
.post-body ul,.post-body ol{padding-left:24px; margin:0 0 20px;}
.post-body li{margin-bottom:8px;}
.post-body a{color:var(--green-mid); text-decoration:underline; text-underline-offset:2px;}
.post-body a:hover{color:var(--gold-strong);}
.post-body img{border-radius:12px; margin:6px 0 20px;}
.post-body blockquote{
  margin:0 0 22px; padding:16px 22px; background:var(--white);
  border-left:3px solid var(--gold-strong); border-radius:0 10px 10px 0;
  font-size:14px; color:var(--text-sub);
}
.post-body blockquote p:last-child{margin-bottom:0;}
.post-body table{
  width:100%; border-collapse:collapse; font-size:13.5px; background:var(--white); margin:0; min-width:440px;
}
.post-body table th{background:var(--navy); color:#fff; text-align:left; padding:10px 14px; font-weight:500; white-space:nowrap;}
.post-body table td{padding:10px 14px; border-top:1px solid var(--border);}
.post-body table tr:nth-child(even) td{background:var(--bg);}
.post-body .table-scroll{overflow-x:auto; -webkit-overflow-scrolling:touch; margin:0 0 22px;}
.post-body hr{border:none; border-top:1px solid var(--border); margin:32px 0;}
.post-body code{
  background:rgba(22,58,46,.07); border-radius:4px; padding:2px 6px; font-size:13px;
}
.post-body pre{
  background:#1f2420; color:#e4e6e0; border-radius:12px; padding:18px 20px;
  font-size:13px; line-height:1.75; overflow-x:auto; margin:0 0 22px;
}
.post-body pre code{background:none; padding:0; color:inherit;}
.post-body audio{width:100%; margin:0 0 22px; border-radius:999px;}
.post-body .embed-wrap{
  position:relative; width:100%; padding-top:56.25%; margin:0 0 22px;
  border-radius:14px; overflow:hidden; background:#000;
  box-shadow:0 10px 26px rgba(22,58,46,.14);
}
.post-body .embed-wrap iframe{position:absolute; inset:0; width:100%; height:100%; border:0;}
/* ファイル添付リンク（download属性付きの<a>） */
.post-body a[download]{
  display:inline-flex; align-items:center; gap:8px; text-decoration:none;
  background:var(--white); border:1px solid var(--border); border-radius:10px;
  padding:12px 18px; font-size:13.5px; font-weight:700; color:var(--navy);
  transition:border-color .2s var(--ease), transform .2s var(--ease);
}
.post-body a[download]::before{content:"⬇"; font-size:13px; color:var(--gold-strong);}
.post-body a[download]:hover{border-color:var(--gold); transform:translateY(-2px);}

/* ===== 目次 ===== */
.toc{
  background:var(--white); border:1px solid var(--border); border-radius:14px;
  padding:20px 22px; margin:0 0 34px;
}
.toc .toc-ttl{font-size:13px; font-weight:700; color:var(--navy); margin:0 0 12px; letter-spacing:.04em;}
.toc ol{list-style:none; margin:0; padding:0; counter-reset:toc;}
.toc li{margin:0 0 8px; font-size:13px; line-height:1.7;}
.toc li.lv3{padding-left:16px; font-size:12.5px;}
.toc a{color:var(--text-sub); text-decoration:none;}
.toc a:hover{color:var(--navy); text-decoration:underline;}

/* ===== サイドバー ===== */
.post-side{position:sticky; top:96px; display:flex; flex-direction:column; gap:20px;}
.side-box{background:var(--white); border:1px solid var(--border); border-radius:14px; padding:20px;}
.side-box h4{font-size:12.5px; color:var(--gold-strong); letter-spacing:.06em; margin:0 0 12px; font-weight:700;}
.side-box ul{list-style:none; margin:0; padding:0;}
.side-box li{border-top:1px solid var(--border); padding:9px 0;}
.side-box li:first-child{border-top:none; padding-top:0;}
.side-box a{font-size:12.5px; color:var(--text); text-decoration:none; line-height:1.65; display:block;}
.side-box a:hover{color:var(--gold-strong);}
.side-cta{
  background:linear-gradient(135deg,var(--navy),var(--green-mid)); color:#fff;
  border-radius:14px; padding:22px 20px; text-align:center;
}
.side-cta p{font-size:13px; margin:0 0 14px; line-height:1.75; color:#e4e6e0;}
.side-cta .btn{background:var(--gold-strong); color:#fff; width:100%; text-align:center;}

/* ===== 著者情報（E-E-A-T） ===== */
.author-box{
  background:var(--white); border:1px solid var(--border); border-radius:16px;
  padding:26px 26px; margin:40px 0 0; display:flex; gap:20px; align-items:flex-start;
}
.author-box .ph{
  width:64px; height:64px; border-radius:50%; flex-shrink:0; overflow:hidden;
  background:linear-gradient(135deg,var(--navy),var(--green-mid));
  display:flex; align-items:center; justify-content:center; color:var(--gold); font-size:24px; font-weight:700;
}
.author-box .ph img{width:100%; height:100%; object-fit:cover; display:block;}
.author-box .k{font-size:11px; color:var(--gold-strong); font-weight:700; letter-spacing:.06em; margin:0 0 4px;}
.author-box h3{font-size:17px; margin:0 0 8px;}
.author-box .cred{display:flex; flex-wrap:wrap; gap:6px; margin:0 0 10px;}
.author-box .cred span{
  font-size:11.5px; font-weight:700; padding:4px 10px; border-radius:999px;
  background:rgba(185,168,143,.2); border:1px solid rgba(185,168,143,.55); color:var(--navy);
}
.author-box p{font-size:13px; color:var(--text-sub); margin:0; line-height:1.85;}
.author-box .uni{font-size:12.5px; color:var(--text-sub); margin:0 0 8px;}

/* ===== 記事末尾の注記 ===== */
.post-note{
  margin-top:26px; font-size:12px; color:var(--text-sub); line-height:1.85;
  border-top:1px solid var(--border); padding-top:18px;
}

/* ===== 関連記事 ===== */
.related-head{display:flex; align-items:baseline; justify-content:space-between; gap:16px; margin-bottom:18px;}
.related-head h2{margin:0;}
.related-head a{font-size:13px; color:var(--gold-strong); text-decoration:none; font-weight:700; white-space:nowrap;}

/* ===== トップページのブログセクション ===== */
.home-blog-head{display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin-bottom:22px; flex-wrap:wrap;}
.home-blog-head .lead{margin:0;}

/* =========================================================
   レスポンシブ
   ========================================================= */
@media(max-width:1024px){
  .blog-grid{grid-template-columns:repeat(2,1fr); gap:16px;}
  .post-layout{grid-template-columns:minmax(0,1fr) 230px; gap:30px;}
  .post-hero h1{font-size:26px;}
}

@media(max-width:860px){
  .post-layout{grid-template-columns:1fr; gap:0;}
  .post-side{position:static; margin-top:36px;}
}

@media(max-width:600px){
  .blog-grid{grid-template-columns:1fr; gap:14px;}
  .post-hero h1{font-size:21px; line-height:1.55;}
  .post-meta{font-size:11.5px; gap:10px;}
  .post-body{font-size:14.5px;}
  .post-body h2{font-size:18px; margin-top:34px;}
  .post-body h3{font-size:16px;}
  .toc{padding:16px 18px;}
  .author-box{flex-direction:column; gap:14px; padding:20px 18px;}
  .cat-filter a{font-size:12px; padding:6px 12px;}
}