@charset "UTF-8";

/* ===================================================================
  1. CSS変数定義（Design Tokens）
  あたまの散歩道：温かみのある白 × 墨黒 × 深藍（インクネイビー）
=================================================================== */
.atama-site {
  --bg-base: #fbfbfa;          /* ウォームオフホワイト（紙の温かみ） */
  --bg-card: #ffffff;          /* パネル・カードの純白 */
  
  --text-main: #1c1917;        /* 柔らかさのあるスレート墨黒 */
  --text-sub: #475569;         /* 落ち着いたスレートグレー */
  --text-muted: #64748b;       /* 控えめな薄グレー */
  
  --border-line: #e7e5e4;      /* 1px繊細なヘアライン */
  --border-light: #f5f5f4;     /* 極薄の区切り線 */
  
  --accent-color: #1e3a5f;     /* インクネイビー（万年筆のインク色） */
  --accent-hover: #0f172a;     /* ホバー時の濃紺 */
  --accent-bg: #f1f5f9;        /* タグや引用の淡い背景 */

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", Meiryo, sans-serif;
  --font-mono: "JetBrains Mono", Consolas, Menlo, monospace;

  --container-max: 1120px;
  --radius-sm: 2px;            /* 丸みは極小にし、端正な直角感を保つ */
  --transition-fast: 0.15s ease;
}

/* ===================================================================
  2. リセット & ベース
=================================================================== */
.atama-site *, .atama-site *::before, .atama-site *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.atama-site {
  font-size: 16px;
  scroll-behavior: smooth;
}

.atama-site {
  font-family: var(--font-base);
  color: var(--text-main);
  background-color: var(--bg-base);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

.atama-site a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.atama-site .container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===================================================================
  3. サイトヘッダー
=================================================================== */
.atama-site .site-header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-line);
}

.atama-site .header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.atama-site .site-branding {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.atama-site .site-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.atama-site .site-sub {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-sub);
}

.atama-site .parent-link {
  font-size: 0.75rem;
  color: var(--text-muted);
  border-left: 1px solid var(--border-line);
  padding-left: 12px;
}

.atama-site .parent-link:hover {
  color: var(--accent-color);
}

.atama-site .site-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

.atama-site .site-nav a {
  font-size: 0.875rem;
  color: var(--text-sub);
}

.site-nav a.is-active,
.atama-site .site-nav a:hover {
  color: var(--accent-color);
}

/* ===================================================================
  4. 主題下ステートメント（まとめ文）
=================================================================== */
.atama-site .statement-banner {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  padding: 24px 28px;
  margin-top: 32px;
  margin-bottom: 32px;
}

.atama-site .statement-lead {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.atama-site .statement-sub {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===================================================================
  5. 2カラムレイアウト構造
=================================================================== */
.atama-site .main-wrapper {
  padding-bottom: 80px;
}

.atama-site .layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

/* 記事カード一覧 */
.atama-site .posts-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.atama-site .post-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  gap: 20px;
  transition: border-color var(--transition-fast);
}

.atama-site .post-card:hover {
  border-color: var(--accent-color);
}

.atama-site .post-thumb {
  flex-shrink: 0;
  width: 100px;
  height: 80px;
}

.atama-site .thumb-box {
  width: 100%;
  height: 100%;
  background-color: var(--accent-bg);
  border: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-sub);
}

.atama-site .post-.atama-site {
  flex-grow: 1;
}

.atama-site .post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.atama-site .post-cat {
  background-color: var(--accent-bg);
  color: var(--accent-color);
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 2px;
}

.atama-site .post-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 8px;
}

.atama-site .post-title a:hover {
  color: var(--accent-color);
}

.atama-site .post-excerpt {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 12px;
}

.atama-site .post-tags {
  display: flex;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===================================================================
  6. サイドバー（独立セル構造）
=================================================================== */
.atama-site .sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.atama-site .sidebar-cell {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.atama-site .cell-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.04em;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.atama-site .cell-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.atama-site .cell-list a {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.atama-site .cell-list-date {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.atama-site .cell-list-text {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.atama-site .cell-list a:hover .cell-list-text {
  color: var(--accent-color);
}

/* タグクラウド */
.atama-site .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.atama-site .tag-chip {
  font-size: 0.75rem;
  background-color: var(--bg-base);
  border: 1px solid var(--border-line);
  padding: 4px 8px;
  border-radius: 2px;
  color: var(--text-sub);
}

.atama-site .tag-chip:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* プロフィールセル（最下部） */
.atama-site .profile-cell {
  background-color: var(--bg-card);
}

.atama-site .profile-meta {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.atama-site .profile-text {
  font-size: 0.8rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===================================================================
  7. 記事詳細ページ
=================================================================== */
.atama-site .breadcrumbs-area {
  padding-top: 16px;
  padding-bottom: 16px;
}

.atama-site .breadcrumbs {
  display: flex;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  list-style: none;
}

.atama-site .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
}

.atama-site .entry-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  padding: 40px;
}

.atama-site .entry-title {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.35;
  margin-top: 10px;
  margin-bottom: 24px;
}

.atama-site .entry-toc {
  background-color: var(--bg-base);
  border: 1px solid var(--border-line);
  padding: 20px;
  margin-bottom: 32px;
}

.atama-site .toc-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 10px;
}

.atama-site .entry-toc ol {
  list-style: decimal inside;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.atama-site .entry-toc a {
  font-size: 0.85rem;
  color: var(--text-sub);
}

.atama-site .entry-content {
  font-size: 1rem;
  line-height: 1.9;
  color: #262626;
}

.atama-site .entry-content p {
  margin-bottom: 24px;
}

.atama-site .entry-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 44px 0 18px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-line);
}

.atama-site .custom-quote {
  border-left: 3px solid var(--accent-color);
  background-color: var(--bg-base);
  padding: 16px 20px;
  margin: 28px 0;
  color: var(--text-sub);
}

.atama-site .custom-quote p {
  margin-bottom: 0;
}

.atama-site .entry-footer {
  border-top: 1px solid var(--border-line);
  padding-top: 20px;
  margin-top: 40px;
}

/* ===================================================================
  8. サイトフッター
=================================================================== */
.atama-site .site-footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-line);
  padding: 32px 0;
}

.atama-site .footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.atama-site .footer-links {
  list-style: none;
  display: flex;
  gap: 20px;
}

/* ===================================================================
  9. レスポンシブ（スマホ・タブレット対応）
=================================================================== */
@media (max-width: 860px) {
  .atama-site .layout-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .atama-site .sidebar {
    order: 2;
  }

  .atama-site .post-card {
    flex-direction: column;
    gap: 12px;
  }

  .atama-site .post-thumb {
    width: 100%;
    height: 120px;
  }

  .atama-site .entry-card {
    padding: 24px 20px;
  }

  .atama-site .entry-title {
    font-size: 1.4rem;
  }
}
/* Responsive and WordPress core-block parity. */
.atama-site {margin:0;font-size:16px;--wp--style--block-gap:0;}
.atama-site .header-inner {height:auto;min-height:68px;gap:16px;padding-top:16px;padding-bottom:16px;flex-wrap:wrap;}
.atama-site .site-branding {flex-wrap:wrap;column-gap:16px;row-gap:4px;}
.atama-site .site-title {line-height:1.5;}
.atama-site .site-sub {display:inline-block;}
.atama-site .site-nav ul {flex-wrap:wrap;gap:6px 20px;}
.atama-site .site-nav a {display:block;padding:5px 0;}
.atama-site .parent-link {color:#64748b;}
.atama-site a:focus-visible {outline:2px solid #1e3a5f;outline-offset:4px;}
.atama-site .skip-link {position:absolute;left:16px;top:-100px;z-index:100000;background:white;padding:12px 20px;border:2px solid #1e3a5f;}
.atama-site .skip-link:focus {top:8px;}
.atama-site .screen-reader-text {position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.atama-site .layout-grid > * {min-width:0;}
.atama-site .post-body {min-width:0;}
.atama-site .post-tags {flex-wrap:wrap;}
.atama-site .post-tags a:hover,.atama-site .archive-link a,.atama-site .entry-content a,.atama-site .entry-footer a {text-decoration:underline;text-underline-offset:3px;}
.atama-site .archive-wrapper {padding-top:32px;}
.atama-site .archive-title {font-size:1.4rem;margin:0 0 24px;line-height:1.5;}
.atama-site .archive-link {margin-top:24px;font-size:.875rem;}
.atama-site .breadcrumbs {flex-wrap:wrap;}
.atama-site .footer-inner {gap:16px;flex-wrap:wrap;}
.atama-site .footer-links {gap:8px 20px;flex-wrap:wrap;}
.atama-site .sample-notice {font-size:.85rem;background:var(--accent-bg);padding:12px 16px;}
.atama-site .wp-block-group {box-sizing:border-box;}
.atama-site .wp-block-post-template {list-style:none;padding:0;display:flex;flex-direction:column;gap:20px;}
.atama-site .wp-block-post-featured-image {margin:0;}
.atama-site .post-thumb img {display:block;width:100%;height:100%;object-fit:cover;}
.atama-site .wp-block-post-excerpt__excerpt {margin:0;}
.atama-site .wp-block-post-terms {font-size:.75rem;}
.atama-site .wp-block-post-terms a {display:inline-block;}
.atama-site .wp-block-post-terms__separator {margin:0 4px;}
.atama-site .wp-block-post-date {font-size:.75rem;color:var(--text-muted);}
.atama-site .wp-block-query-pagination {display:flex;gap:20px;margin-top:24px;font-size:.875rem;}
.atama-site .widget {margin:0;padding:0;}
.atama-site .entry-content h2 {scroll-margin-top:24px;}
.atama-site .cell-list p {margin:0;}
.atama-site .cell-list li p + p {margin-top:2px;}
@media(max-width:600px){
 .atama-site .container{padding-left:18px;padding-right:18px;}
 .atama-site .header-inner{align-items:flex-start;gap:12px;}
 .atama-site .site-branding{display:block;}
 .atama-site .parent-link{display:block;border:0;padding:0;margin-top:6px;}
 .atama-site .site-nav{width:100%;}
 .atama-site .site-nav ul{justify-content:space-between;gap:4px 12px;}
 .atama-site .site-nav a{font-size:.8rem;}
 .atama-site .statement-banner{margin-top:24px;margin-bottom:24px;padding:20px;}
 .atama-site .post-card{padding:20px;}
 .atama-site .main-wrapper{padding-bottom:48px;}
 .atama-site .entry-title{line-height:1.5;overflow-wrap:anywhere;}
 .atama-site .entry-toc ol{list-style-position:outside;padding-left:1.3em;}
 .atama-site .footer-inner{align-items:flex-start;}
}
@media(prefers-reduced-motion:reduce){.atama-site *{scroll-behavior:auto;transition:none;}}