/* ============================================================
   IT.Skill ブログ専用スタイル
   site.css のトークンに依存（オレンジ×黒×白）。
   ============================================================ */

.blog-main { background: var(--bg); min-height: 60vh; }

/* ── ヒーロー ── */
.blog-hero {
  padding: clamp(56px, 7vw, 96px) 0 clamp(36px, 4vw, 56px);
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}
.blog-hero-title {
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  font-weight: 800; line-height: 1.3; letter-spacing: -.02em;
  color: var(--ink); margin: 0 0 14px;
}
.blog-hero-title em { font-style: normal; color: var(--accent); }
.blog-hero-lead { color: var(--muted); font-size: 1.02rem; max-width: 640px; margin: 0; }

/* ── セクション ── */
.blog-section { padding: clamp(36px, 5vw, 64px) 0 clamp(72px, 9vw, 122px); }

/* ── カテゴリフィルタ ── */
.blog-cats {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding-bottom: 28px; margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.blog-cat {
  font-family: var(--ff-mono); font-size: .78rem; font-weight: 600;
  padding: 7px 14px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line-strong);
  color: var(--muted); transition: all .15s var(--ease);
}
.blog-cat:hover { border-color: var(--accent); color: var(--accent); }
.blog-cat.is-current {
  background: var(--ink); color: #fff; border-color: var(--ink);
}

/* ── 記事グリッド ── */
.blog-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 26px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.blog-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s;
}
.blog-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.blog-card-link { display: block; color: inherit; }
.blog-card-thumb {
  aspect-ratio: 16 / 9;
  background: var(--bg-tint);
  overflow: hidden;
  position: relative;
}
.blog-card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.blog-card-thumb.is-placeholder {
  background:
    repeating-linear-gradient(135deg, transparent 0 12px, rgba(234, 88, 12, .04) 12px 14px),
    var(--accent-wash);
}
.blog-card-thumb.is-placeholder::after {
  content: "IT.Skill"; position: absolute; inset: 0;
  display: grid; place-items: center;
  font-family: var(--ff-mono); font-size: .9rem; font-weight: 700;
  color: var(--accent); letter-spacing: .12em; opacity: .55;
}
.blog-card-body { padding: 18px 20px 22px; }
.blog-card-cat {
  font-family: var(--ff-mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .12em; color: var(--accent); text-transform: uppercase;
  margin-bottom: 8px;
}
.blog-card-title {
  font-size: 1.06rem; font-weight: 800; line-height: 1.45;
  color: var(--ink); margin: 0 0 10px; letter-spacing: -.01em;
}
.blog-card-excerpt {
  font-size: .9rem; line-height: 1.7; color: var(--muted); margin: 0 0 14px;
}
.blog-card-meta {
  font-family: var(--ff-mono); font-size: .72rem; color: var(--faint); letter-spacing: .04em;
}

/* ── ページャ ── */
.blog-pager {
  display: flex; justify-content: center; align-items: center; gap: 18px;
  margin-top: 56px;
}
.blog-pager-btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-weight: 700; font-size: .92rem;
  padding: 10px 20px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: #fff; color: var(--ink);
  transition: all .15s var(--ease);
}
.blog-pager-btn:hover { border-color: var(--accent); color: var(--accent); }
.blog-pager-info { font-family: var(--ff-mono); font-size: .85rem; color: var(--muted); }
.blog-empty { color: var(--muted); text-align: center; padding: 60px 0; }

/* ============================================================
   記事詳細
   ============================================================ */
.blog-article-head {
  padding: clamp(48px, 6vw, 84px) 0 clamp(28px, 3vw, 44px);
  border-bottom: 1px solid var(--line);
}
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 7px;
  font-family: var(--ff-mono); font-size: .76rem; color: var(--muted);
  margin-bottom: 22px;
}
.breadcrumb a { color: var(--muted); transition: color .15s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--faint); }

.blog-article-cat {
  display: inline-block;
  font-family: var(--ff-mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .12em; color: var(--accent); text-transform: uppercase;
  background: var(--accent-wash); border: 1px solid #fdd9b8;
  padding: 5px 12px; border-radius: 999px; margin-bottom: 16px;
}
.blog-article-title {
  font-size: clamp(1.7rem, 3.6vw, 2.8rem);
  font-weight: 800; line-height: 1.35; letter-spacing: -.02em;
  color: var(--ink); margin: 0 0 18px; max-width: 880px;
}
.blog-article-meta {
  display: flex; align-items: center; gap: 9px;
  font-family: var(--ff-mono); font-size: .8rem; color: var(--muted);
  letter-spacing: .04em;
}
.blog-article-meta .sep { color: var(--faint); }

.blog-article-cover {
  margin: 0;
  padding: clamp(28px, 3vw, 44px) 24px 0;
  display: flex; justify-content: center;
}
.blog-article-cover img {
  display: block; width: 100%; max-width: 1080px;
  aspect-ratio: 16 / 7; object-fit: cover;
  border-radius: var(--radius); border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}

.blog-article-body { max-width: 760px; padding-top: clamp(40px, 5vw, 64px); padding-bottom: clamp(72px, 8vw, 110px); }

/* ── 本文（GitHub風） ── */
.blog-prose {
  color: var(--text);
  font-size: 1.04rem;
  line-height: 1.92;
}
.blog-prose > * + * { margin-top: 1.1em; }
.blog-prose h2 {
  font-size: 1.5rem; font-weight: 800; line-height: 1.4; letter-spacing: -.01em;
  color: var(--ink); margin: 2em 0 .7em; padding-bottom: 10px;
  border-bottom: 2px solid var(--line);
}
.blog-prose h3 {
  font-size: 1.22rem; font-weight: 800; line-height: 1.45;
  color: var(--ink); margin: 1.8em 0 .5em;
}
.blog-prose h4 {
  font-size: 1.05rem; font-weight: 800; color: var(--ink);
  margin: 1.6em 0 .4em;
}
.blog-prose p { margin: 0; }
.blog-prose a {
  color: var(--accent); text-decoration: underline;
  text-decoration-thickness: 1.5px; text-underline-offset: 3px;
}
.blog-prose a:hover { color: var(--accent-deep); }
.blog-prose strong { font-weight: 700; color: var(--ink); }
.blog-prose ul, .blog-prose ol { padding-left: 1.4em; margin: 1.2em 0; }
.blog-prose ul li, .blog-prose ol li { margin: .5em 0; }
.blog-prose blockquote {
  margin: 1.6em 0; padding: 16px 22px;
  background: var(--accent-wash); border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--accent-ink);
}
.blog-prose blockquote p { margin: 0; font-size: .98rem; }
.blog-prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }

.blog-prose code {
  font-family: var(--ff-mono); font-size: .9em;
  background: #f5efe2; color: var(--accent-ink);
  padding: 2px 7px; border-radius: 5px;
}
.blog-prose pre {
  margin: 1.5em 0; padding: 18px 22px;
  background: #1a1a1a; color: #f5f5f5;
  border-radius: var(--radius-sm); overflow-x: auto;
  font-size: .88rem; line-height: 1.7;
}
.blog-prose pre code { background: transparent; color: inherit; padding: 0; }

.blog-prose img { max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: 1.4em 0; }
.blog-prose table {
  width: 100%; border-collapse: collapse; margin: 1.6em 0;
  font-size: .95rem;
}
.blog-prose th, .blog-prose td {
  padding: 10px 14px; border: 1px solid var(--line);
  text-align: left;
}
.blog-prose th { background: var(--bg-soft); font-weight: 700; color: var(--ink); }

/* ── 記事末尾CTA ── */
.blog-cta {
  margin-top: 64px; padding: 32px clamp(24px, 3vw, 40px);
  background: var(--ink); color: #fff;
  border-radius: var(--radius);
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.blog-cta::before {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(234, 88, 12, .35), transparent 65%);
}
.blog-cta-text { flex: 1; min-width: 240px; position: relative; }
.blog-cta-text .section-label { color: rgba(234, 88, 12, .9); margin-bottom: 10px; }
.blog-cta-text h2 { font-size: 1.35rem; font-weight: 800; margin: 0 0 8px; color: #fff; letter-spacing: -.01em; }
.blog-cta-text p { color: rgba(255, 255, 255, .75); font-size: .95rem; line-height: 1.75; margin: 0; }
.blog-cta .btn { position: relative; }

/* ── 関連記事 ── */
.blog-related {
  padding: clamp(48px, 6vw, 80px) 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}
.blog-related-title {
  font-size: 1.3rem; font-weight: 800;
  color: var(--ink); margin: 0 0 28px; letter-spacing: -.01em;
}

/* ── ナビ：ブログ active 状態 ── */
.nav-menu a.is-active {
  color: var(--accent);
  position: relative;
}

@media (max-width: 720px) {
  .blog-cta { padding: 24px; }
  .blog-cta .btn { width: 100%; justify-content: center; }
}

/* ============================================================
   MAGAZINE — 一覧UI（検索 / カテゴリ / 月別アーカイブ）
   ============================================================ */
.mag-hero { padding: clamp(52px, 7vw, 84px) 0 clamp(30px, 4vw, 44px); background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.mag-kicker {
  font-family: var(--ff-mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .28em; color: var(--faint); text-transform: uppercase; margin-bottom: 14px;
}
.mag-title {
  font-size: clamp(1.6rem, 3.4vw, 2.5rem); font-weight: 800; line-height: 1.45;
  letter-spacing: -.015em; color: var(--ink); margin: 0 0 14px;
}
.mag-title em {
  font-family: var(--ff-serif); font-style: italic; font-weight: 400;
  color: var(--accent); font-size: 1.1em;
}
.mag-lead { font-size: .95rem; line-height: 1.95; color: var(--muted); margin: 0; max-width: 640px; }

.mag-body { padding: clamp(36px, 5vw, 60px) 0 clamp(70px, 9vw, 110px); }
.mag-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: clamp(30px, 4vw, 56px); align-items: start; }

/* 絞り込み状態 */
.mag-status {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  padding-bottom: 16px; margin-bottom: 6px; border-bottom: 1px solid var(--line);
}
.mag-status-label { font-family: var(--ff-mono); font-size: .78rem; color: var(--muted); letter-spacing: .04em; }
.mag-status-clear { font-size: .78rem; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* 記事リスト（横並びカード） */
.mag-list { list-style: none; margin: 0; padding: 0; }
.mag-item { border-bottom: 1px solid var(--line); }
.mag-item-link {
  display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 22px;
  padding: 22px 0; align-items: start; transition: opacity .2s var(--ease);
}
.mag-item-link:hover { opacity: .68; }

/* カバー：og_image が無いときは slug 由来の色で記事ごとに変える */
.mag-thumb {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  border: 1px solid var(--line); background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
}
.mag-thumb img { width: 100%; height: 100%; object-fit: cover; }
.mag-thumb:not(:has(img)) {
  background:
    linear-gradient(135deg,
      hsl(calc(var(--seed, 20) * 1deg) 62% 94%) 0%,
      hsl(calc(var(--seed, 20) * 1deg + 26) 58% 88%) 100%);
}
.mag-thumb-mark {
  font-family: var(--ff-serif); font-size: 2.7rem; line-height: 1;
  color: hsl(calc(var(--seed, 20) * 1deg) 55% 32%); opacity: .9;
}
.mag-thumb-cat {
  position: absolute; left: 10px; bottom: 8px;
  font-family: var(--ff-mono); font-size: .58rem; letter-spacing: .14em;
  color: hsl(calc(var(--seed, 20) * 1deg) 45% 34%); opacity: .8;
  text-transform: uppercase;
}

.mag-item-meta {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-family: var(--ff-mono); font-size: .68rem; color: var(--faint); margin-bottom: 9px;
}
.mag-item-cat { color: var(--accent); font-weight: 600; letter-spacing: .06em; }
.mag-item-read::before { content: "·"; margin-right: 12px; opacity: .6; }
.mag-item-title {
  font-size: 1.06rem; font-weight: 700; line-height: 1.6; color: var(--ink); margin: 0 0 8px;
}
.mag-item-excerpt { font-size: .87rem; line-height: 1.85; color: var(--muted); margin: 0; }

/* ページャ */
.mag-pager { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 40px; }
.mag-pager-btn {
  font-size: .82rem; font-weight: 600; padding: 11px 20px;
  border: 1px solid var(--line-strong); color: var(--ink); transition: background .2s, color .2s;
}
.mag-pager-btn:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.mag-pager-info { font-family: var(--ff-mono); font-size: .76rem; color: var(--muted); }

/* 空状態 */
.mag-empty { padding: 56px 0; text-align: center; }
.mag-empty-title { font-size: 1.02rem; font-weight: 700; color: var(--ink); margin: 0 0 8px; }
.mag-empty-sub { font-size: .88rem; color: var(--muted); margin: 0 0 22px; }

/* ── サイドバー ── */
.mag-side { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 30px; }
.mag-side-h {
  display: block; font-family: var(--ff-mono); font-size: .66rem; font-weight: 600;
  letter-spacing: .2em; color: var(--faint); text-transform: uppercase; margin-bottom: 12px;
}
.mag-search-row { display: flex; border: 1px solid var(--line-strong); background: #fff; }
.mag-search-row input {
  flex: 1; min-width: 0; border: none; background: transparent;
  padding: 11px 13px; font-size: .85rem; font-family: inherit; color: var(--ink);
}
.mag-search-row input:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.mag-search-row button {
  border: none; background: var(--ink); color: #fff; padding: 0 15px; cursor: pointer;
  display: flex; align-items: center;
}
.mag-search-row button svg { width: 15px; height: 15px; }
.mag-search-row button:hover { background: var(--accent); }

.mag-side-list { list-style: none; margin: 0; padding: 0; }
.mag-side-list li { border-top: 1px solid var(--line); }
.mag-side-list li:last-child { border-bottom: 1px solid var(--line); }
.mag-side-list a {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 2px; font-size: .84rem; color: var(--text); transition: color .2s;
}
.mag-side-list a:hover { color: var(--accent); }
.mag-side-list a.is-current { color: var(--accent); font-weight: 700; }
.mag-archive-n { font-family: var(--ff-mono); font-size: .68rem; color: var(--faint); }

.mag-side-cta { border: 1px solid var(--ink); padding: 20px; background: var(--ink); color: #fff; }
.mag-side-cta-h { font-size: .95rem; font-weight: 700; margin-bottom: 8px; }
.mag-side-cta p { font-size: .8rem; line-height: 1.8; color: rgba(255,255,255,.72); margin: 0 0 16px; }
.mag-side-cta .btn { width: 100%; background: #fff; color: var(--ink); padding: 12px 18px; font-size: .82rem; }
.mag-side-cta .btn:hover { background: var(--accent); color: #fff; opacity: 1; }

@media (max-width: 900px) {
  .mag-layout { grid-template-columns: 1fr; }
  .mag-side { position: static; order: -1; }
}
@media (max-width: 560px) {
  .mag-item-link { grid-template-columns: 110px minmax(0, 1fr); gap: 14px; }
  .mag-thumb-mark { font-size: 1.7rem; }
  .mag-thumb-cat { display: none; }
}