/*
Theme Name: LDO Data Blog
Theme URI: https://example.com/ldo-data-blog
Author: Lean Data Office
Author URI: https://example.com
Description: Minimal dark, classic-style, mobile-first theme for a data blog.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ldo-data-blog
Tags: blog, dark, responsive, two-columns, classic
*/

/* CSS Custom Properties (Light Theme) */
:root {
  --ldo-bg: #f8fafc;
  --ldo-bg-alt: #e5edf9;
  --ldo-surface: #ffffff;
  --ldo-border-subtle: #d4dce8;
  --ldo-text: #111827;
  --ldo-text-muted: #6b7280;
  --ldo-accent: #2563eb;
  --ldo-accent-soft: rgba(37, 99, 235, 0.08);
  --ldo-accent-strong: #1d4ed8;
  --ldo-error: #dc2626;
  --ldo-radius-sm: 0.375rem;
  --ldo-radius-md: 0.75rem;
  --ldo-radius-lg: 1.25rem;
  --ldo-shadow-soft: 0 14px 30px rgba(148, 163, 184, 0.3);
  --ldo-font-base: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  --ldo-font-mono: Menlo, Monaco, Consolas, "Liberation Mono", "Courier New",
    monospace;
  --ldo-line-height: 1.6;
  --ldo-max-width: 960px;
  --ldo-spacing-xs: 0.375rem;
  --ldo-spacing-sm: 0.75rem;
  --ldo-spacing-md: 1.25rem;
  --ldo-spacing-lg: 1.75rem;
  --ldo-spacing-xl: 2.25rem;
  --ldo-touch-target: 44px;
  /*
   * モバイル: オーバーレイのぼかしをヘッダー帯にかけないためのオフセット
   * .ldo-header（safe-area + 上パディング）+ ロゴ行(56px) + 下パディング
   */
  --ldo-overlay-backdrop-top-mobile: calc(
    env(safe-area-inset-top, 0px) + var(--ldo-spacing-md) + 56px +
      var(--ldo-spacing-lg)
  );
}

/* Global Reset (Minimal) */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--ldo-font-base);
  line-height: var(--ldo-line-height);
  background: radial-gradient(circle at top, #e5edff 0, #f8fafc 55%);
  color: var(--ldo-text);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--ldo-accent);
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ldo-accent);
  outline-offset: 3px;
}

button {
  font-family: inherit;
}

/* Layout */
.ldo-site {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.ldo-shell {
  width: 100%;
  max-width: var(--ldo-max-width);
  margin: 0 auto;
  padding: var(--ldo-spacing-lg) var(--ldo-spacing-md) var(--ldo-spacing-xl);
}

@media (min-width: 768px) {
  .ldo-shell {
    padding-top: var(--ldo-spacing-xl);
    padding-bottom: calc(var(--ldo-spacing-xl) * 1.4);
  }
}

/* Header（背景は付けず body のグラデと一体。640px 未満だけオーバーレイ用に z-index を上げる） */
.ldo-header {
  padding-top: var(--ldo-spacing-md);
  padding-bottom: var(--ldo-spacing-lg);
  position: relative;
}

.ldo-header-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: var(--ldo-spacing-sm);
}

.ldo-header-left {
  display: flex;
  flex-direction: column;
  gap: var(--ldo-spacing-xs);
}

.ldo-header-right {
  display: flex;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-xs) var(--ldo-spacing-md);
  width: 100%;
  justify-content: flex-end;
}

/* デスクトップ: トップ・カテゴリ・月別と同じ行の右端にキーワード検索 */
.ldo-header-search-form {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0.15rem;
  min-width: 0;
  max-width: min(100%, 15rem);
  padding: 0.2rem 0.45rem 0.2rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--ldo-border-subtle);
  background: var(--ldo-surface);
  box-shadow: 0 1px 2px rgba(148, 163, 184, 0.15);
}

.ldo-header-search-input {
  flex: 1 1 auto;
  min-width: 5.5rem;
  max-width: 11rem;
  border: none;
  background: transparent;
  font-size: 0.85rem;
  color: var(--ldo-text);
  padding: 0.2rem 0;
}

.ldo-header-search-input::placeholder {
  color: var(--ldo-text-muted);
}

.ldo-header-search-input:focus-visible {
  outline: none;
}

.ldo-header-search-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--ldo-text-muted);
  border-radius: 999px;
}

.ldo-header-search-button:hover {
  color: var(--ldo-accent);
}

.ldo-logo-link {
  display: inline-block;
  line-height: 0;
  /* 本番で親に border-radius が当たって楕円枠になるのを打ち消す */
  border-radius: 0 !important;
  overflow: visible !important;
}

/* 本番の追加CSS・プラグインで img / .custom-logo に楕円・小さいサイズが当たるのを打ち消す */
.ldo-header .ldo-header-logo,
.ldo-logo-link .ldo-header-logo {
  display: block;
  height: 56px !important; /* さらに控えめなサイズ感（約半分） */
  width: auto !important;
  max-width: 100%;
  border-radius: 0 !important;
  object-fit: contain;
}

/* キャッチフレーズ（サイトの説明文）はヘッダーに表示しない（ロゴ周りのずれ防止）。 */
.ldo-tagline {
  display: none !important;
}

/* ハンバーガー: 640px超では非表示 */
.ldo-header-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--ldo-touch-target);
  height: var(--ldo-touch-target);
  min-width: var(--ldo-touch-target);
  flex-shrink: 0;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--ldo-text);
}

/* 3本線: 上(::before)・中(spanのグラデ)・下(::after)、等間隔・同太さ */
.ldo-header-toggle-icon {
  display: block;
  width: 1.25rem;
  height: 0.75rem;
  position: relative;
  background: linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(50% - 1px),
    currentColor calc(50% - 1px),
    currentColor calc(50% + 1px),
    transparent calc(50% + 1px)
  );
  border-radius: 1px;
  transition: background 0.2s ease;
}

.ldo-header-toggle-icon::before,
.ldo-header-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, top 0.2s ease, bottom 0.2s ease;
}

.ldo-header-toggle-icon::before {
  top: 0;
}

.ldo-header-toggle-icon::after {
  bottom: 0;
}

/* ハンバーガー → X 変形（同じ位置で閉じる） */
body.ldo-overlay-open .ldo-header-toggle-icon {
  background: transparent;
}

body.ldo-overlay-open .ldo-header-toggle-icon::before {
  top: 50%;
  margin-top: 0;
  transform: translateY(-50%) rotate(45deg);
}

body.ldo-overlay-open .ldo-header-toggle-icon::after {
  bottom: auto;
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
}

.ldo-nav {
  margin-top: var(--ldo-spacing-md);
}

.ldo-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-sm) var(--ldo-spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}

.ldo-nav-list > li {
  position: relative;
}

.ldo-nav-list a,
.ldo-nav-dropdown-trigger {
  color: var(--ldo-text-muted);
  font-size: 0.9rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}

.ldo-nav-list a:hover,
.ldo-nav-dropdown-trigger:hover {
  color: var(--ldo-accent);
}

/* ドロップダウン */
.ldo-nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.2em;
}

.ldo-nav-dropdown-trigger::after {
  content: "";
  border: 0.35em solid transparent;
  border-top-color: currentColor;
  margin-top: 0.15em;
}

.ldo-nav-has-dropdown.is-open .ldo-nav-dropdown-trigger::after {
  margin-top: -0.2em;
  border-top-color: transparent;
  border-bottom-color: currentColor;
}

.ldo-nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin: 0.25rem 0 0;
  min-width: 10rem;
  max-height: 70vh;
  overflow-y: auto;
  list-style: none;
  padding: var(--ldo-spacing-xs);
  background: var(--ldo-surface);
  border: 1px solid var(--ldo-border-subtle);
  border-radius: var(--ldo-radius-md);
  box-shadow: var(--ldo-shadow-soft);
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.15s, opacity 0.15s;
  z-index: 100;
}

.ldo-nav-has-dropdown:hover .ldo-nav-dropdown,
.ldo-nav-has-dropdown.is-open .ldo-nav-dropdown {
  visibility: visible;
  opacity: 1;
}

.ldo-nav-dropdown li {
  margin: 0;
}

.ldo-nav-dropdown a {
  display: block;
  padding: var(--ldo-spacing-xs) var(--ldo-spacing-sm);
  border-radius: var(--ldo-radius-sm);
  white-space: nowrap;
}

.ldo-nav-dropdown a:hover {
  background: var(--ldo-accent-soft);
}

/* オーバーレイ（メニュー） */
.ldo-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.2s, opacity 0.2s;
}

.ldo-overlay[aria-hidden="false"],
.ldo-overlay.is-open {
  visibility: visible;
  opacity: 1;
}

.ldo-overlay[hidden] {
  display: block !important;
}

.ldo-overlay[hidden]:not(.is-open) {
  visibility: hidden;
  pointer-events: none;
}

.ldo-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(6px);
}

.ldo-overlay-panel {
  position: relative;
  max-width: 28rem;
  margin: 0 auto;
  min-height: 100%;
  padding: var(--ldo-spacing-lg) var(--ldo-spacing-md);
  display: flex;
  flex-direction: column;
  transition: opacity 0.12s ease;
}

/* 閉じる瞬間にパネル内容を即非表示にして、検索欄がヘッダーにかからないようにする */
.ldo-overlay:not(.is-open) .ldo-overlay-panel {
  opacity: 0;
  transition: none;
  pointer-events: none;
}

.ldo-overlay.is-open .ldo-overlay-panel {
  opacity: 1;
}

.ldo-overlay-body {
  flex: 1;
}

.ldo-overlay-search-form {
  display: flex;
  align-items: center;
  gap: var(--ldo-spacing-xs);
  padding: var(--ldo-spacing-xs) var(--ldo-spacing-sm);
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--ldo-border-subtle);
  box-shadow: var(--ldo-shadow-soft);
  margin-bottom: var(--ldo-spacing-lg);
}

.ldo-overlay-search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  padding: 0 var(--ldo-spacing-xs);
}

.ldo-overlay-search-input:focus-visible {
  outline: none;
}

.ldo-overlay-search-button {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1.1rem;
}

.ldo-overlay-section {
  margin-bottom: var(--ldo-spacing-md);
}

.ldo-overlay-section-title {
  margin: 0 0 var(--ldo-spacing-xs);
  font-size: 0.9rem;
  color: var(--ldo-text-muted);
}

.ldo-overlay-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ldo-overlay-list a {
  display: block;
  padding: 0.25rem 0;
  color: var(--ldo-text);
}

.ldo-overlay-top-link {
  margin-top: var(--ldo-spacing-lg);
}

.ldo-overlay-top-link a {
  color: var(--ldo-accent);
}

/* Main Content */
.ldo-main {
  flex: 1;
}

/* Tile grid: モバイルは1列（タイトル切れ防止）、640px〜899pxで2列、900px〜で3列 */
.ldo-article-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ldo-spacing-md);
}

@media (min-width: 640px) {
  .ldo-article-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .ldo-article-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.ldo-article {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: linear-gradient(135deg, #ffffff, #f3f4ff);
  border-radius: var(--ldo-radius-lg);
  border: 1px solid var(--ldo-border-subtle);
  box-shadow: var(--ldo-shadow-soft);
  overflow: hidden;
  transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.ldo-article:hover {
  border-color: var(--ldo-accent-soft);
  background: radial-gradient(circle at top left, #e0ebff 0, #f8fafc 55%);
  box-shadow: 0 20px 48px rgba(148, 163, 184, 0.35);
}

.ldo-article-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  color: inherit;
}

.ldo-article-link:visited {
  color: inherit;
}

/* Thumbnail: 4:3 aspect, slightly portrait tile overall */
.ldo-article-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--ldo-bg-alt);
}

.ldo-article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ldo-article-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ldo-font-mono);
  font-size: 0.75rem;
  color: var(--ldo-text-muted);
  border: 1px dashed var(--ldo-border-subtle);
}

.ldo-article-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--ldo-spacing-sm) var(--ldo-spacing-md) var(--ldo-spacing-md);
}

.ldo-article-date {
  display: block;
  font-size: 0.78rem;
  color: var(--ldo-text-muted);
  margin: 0 0 var(--ldo-spacing-xs);
}

/* タイル幅は固定のまま、長めタイトル（目安40文字前後）が2行で収まりやすいようやや小さめ */
.ldo-article-title {
  margin: 0 0 var(--ldo-spacing-xs);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.32;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ldo-article-categories {
  list-style: none;
  margin: 0;
  padding: 0 var(--ldo-spacing-md) var(--ldo-spacing-xs);
  display: flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-xs);
}

.ldo-article-categories a {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  line-height: 1.4;
  transition: background 0.15s ease, color 0.15s ease;
}

/* 3件目以降（モバイルで非表示にする対象）— PC では通常表示 */
.ldo-article-cat-ellipsis {
  display: none;
  list-style: none;
  flex-shrink: 0;
  align-items: center;
  margin: 0;
  padding: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ldo-text-muted);
}

.ldo-article-cat-ellipsis span {
  padding: 0.18rem 0.25rem;
  line-height: 1.4;
}

/* モバイル: 先頭2件はカテゴリ名を省略せず表示し、3件目以降は「…」でまとめる（PC は全件） */
@media (max-width: 640px) {
  .ldo-article-categories {
    flex-wrap: nowrap;
    overflow: hidden;
    align-items: center;
    min-width: 0;
  }

  /* 表示中のチップは縮めず全文表示（「デ…」のようなチップ内省略はしない） */
  .ldo-article-categories li:not(.ldo-article-cat-more):not(.ldo-article-cat-ellipsis) {
    flex-shrink: 0;
    max-width: none;
  }

  .ldo-article-categories.has-extra-cats .ldo-article-cat-more {
    display: none !important;
  }

  .ldo-article-categories.has-extra-cats .ldo-article-cat-ellipsis {
    display: flex !important;
  }
}

/* パレット: term_id % 8 で自動割り当て（同じカテゴリは常に同じ色） */
.ldo-article-categories a.ldo-cat-palette-0 { background: rgba(191, 219, 254, 0.75); color: #1e40af; }
.ldo-article-categories a.ldo-cat-palette-0:hover { background: rgba(191, 219, 254, 1); }

.ldo-article-categories a.ldo-cat-palette-1 { background: rgba(187, 247, 208, 0.8); color: #166534; }
.ldo-article-categories a.ldo-cat-palette-1:hover { background: rgba(187, 247, 208, 1); }

.ldo-article-categories a.ldo-cat-palette-2 { background: rgba(253, 230, 138, 0.8); color: #854d0e; }
.ldo-article-categories a.ldo-cat-palette-2:hover { background: rgba(253, 230, 138, 1); }

.ldo-article-categories a.ldo-cat-palette-3 { background: rgba(254, 202, 202, 0.75); color: #991b1b; }
.ldo-article-categories a.ldo-cat-palette-3:hover { background: rgba(254, 202, 202, 1); }

.ldo-article-categories a.ldo-cat-palette-4 { background: rgba(233, 213, 255, 0.8); color: #5b21b6; }
.ldo-article-categories a.ldo-cat-palette-4:hover { background: rgba(233, 213, 255, 1); }

.ldo-article-categories a.ldo-cat-palette-5 { background: rgba(254, 215, 170, 0.8); color: #9a3412; }
.ldo-article-categories a.ldo-cat-palette-5:hover { background: rgba(254, 215, 170, 1); }

.ldo-article-categories a.ldo-cat-palette-6 { background: rgba(165, 243, 252, 0.75); color: #0e7490; }
.ldo-article-categories a.ldo-cat-palette-6:hover { background: rgba(165, 243, 252, 1); }

.ldo-article-categories a.ldo-cat-palette-7 { background: rgba(253, 224, 71, 0.6); color: #713f12; }
.ldo-article-categories a.ldo-cat-palette-7:hover { background: rgba(253, 224, 71, 0.9); }

/* 特定カテゴリだけ色を上書きしたい場合: スラッグで指定（例）
.ldo-article-categories a.ldo-cat-data { background: rgba(191, 219, 254, 0.9); color: #1e40af; }
.ldo-article-categories a.ldo-cat-film { background: rgba(233, 213, 255, 0.9); color: #5b21b6; }
*/

.ldo-article-author {
  display: flex;
  align-items: center;
  padding: var(--ldo-spacing-sm) var(--ldo-spacing-md);
  border-top: 1px solid var(--ldo-border-subtle);
  margin-top: auto;
}

.ldo-article-author-link {
  display: inline-flex;
  align-items: center;
  gap: var(--ldo-spacing-xs);
  color: var(--ldo-text-muted);
  font-size: 0.82rem;
}

.ldo-article-author-link:hover {
  color: var(--ldo-accent);
}

.ldo-article-author-link img {
  width: 28px;
  height: 28px;
  border-radius: 999px;
}

.ldo-article-author-name {
  font-weight: 500;
}

/* Pagination */
.ldo-pagination {
  display: flex;
  justify-content: center;
  margin-top: var(--ldo-spacing-lg);
}

.ldo-pagination .nav-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-xs);
}

.ldo-pagination a,
.ldo-pagination span {
  min-width: var(--ldo-touch-target);
  min-height: var(--ldo-touch-target);
  padding: 0 var(--ldo-spacing-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid var(--ldo-border-subtle);
  background: #f9fafb;
}

.ldo-pagination .current {
  background: var(--ldo-accent);
  color: #ffffff;
  border-color: transparent;
}

/* Single Post */
.ldo-single {
  margin-top: var(--ldo-spacing-md);
  padding-bottom: var(--ldo-spacing-md);
  background: radial-gradient(circle at top left, #ffffff 0, #f3f4ff 55%);
  border-radius: calc(var(--ldo-radius-lg) * 1.1);
  border: 1px solid var(--ldo-border-subtle);
  box-shadow: var(--ldo-shadow-soft);
  overflow: hidden;
}

.ldo-single-header {
  padding: var(--ldo-spacing-md) var(--ldo-spacing-md) 0;
}

.ldo-single-thumb {
  border-radius: calc(var(--ldo-radius-lg) * 0.9);
  overflow: hidden;
  margin-bottom: var(--ldo-spacing-md);
}

.ldo-single-thumb img {
  width: 100%;
  height: auto;
  display: block;
}

.ldo-single-heading {
  padding-bottom: var(--ldo-spacing-md);
}

/* 記事ヘッダー: タイトル・日付は左寄せ、シェアのみ中央 → アイキャッチ（著者・カテゴリは本文直上） */
.ldo-single-heading--hero {
  padding-bottom: var(--ldo-spacing-md);
}

.ldo-single-heading--hero .ldo-single-title {
  text-align: start;
  margin: 0 0 var(--ldo-spacing-sm);
}

.ldo-single-heading--hero .ldo-single-meta {
  justify-content: flex-start;
  margin: 0 0 var(--ldo-spacing-sm);
}

/* 本番で flex が上書きされても中央になるよう幅100%＋!important */
.ldo-single-heading--hero .ldo-single-share {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: wrap !important;
  justify-content: center !important;
  align-items: center !important;
  width: 100% !important;
  max-width: 100% !important;
  margin-left: auto !important;
  margin-right: auto !important;
  margin-top: var(--ldo-spacing-sm);
  margin-bottom: var(--ldo-spacing-md);
}

.ldo-single-heading--hero .ldo-single-share-link {
  justify-content: center !important;
}

.ldo-single-title {
  margin: 0 0 var(--ldo-spacing-sm);
  font-size: 1.5rem;
  line-height: 1.25;
}

.ldo-single-byline {
  margin-bottom: var(--ldo-spacing-xs);
  font-size: 0.8rem;
  color: var(--ldo-text-muted);
}

.ldo-single-byline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--ldo-text-muted);
  font-size: inherit;
}

.ldo-single-byline-link:hover {
  color: var(--ldo-accent);
}

.ldo-single-byline-link img {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: block;
}

/* 本文直上: 著者とカテゴリを横並び（狭い幅では折り返し） */
.ldo-single-submeta {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ldo-spacing-xs) var(--ldo-spacing-md);
  margin-bottom: var(--ldo-spacing-md);
}

.ldo-single-submeta .ldo-single-byline {
  display: flex;
  align-items: center;
  margin-bottom: 0;
  flex-shrink: 0;
  line-height: 1;
}

.ldo-single-submeta .ldo-single-byline-link {
  line-height: 1;
}

.ldo-single-submeta .ldo-single-byline-name {
  line-height: 1.25;
}

.ldo-single-submeta .ldo-article-categories {
  padding: 0;
  margin: 0;
  margin-inline-start: 0;
  padding-inline-start: 0;
  list-style: none;
  justify-content: flex-start;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
}

.ldo-single-submeta .ldo-article-categories li {
  display: flex;
  align-items: center;
}

.ldo-single-submeta .ldo-article-categories a {
  display: inline-flex;
  align-items: center;
}

/* X / Facebook シェア */
.ldo-single-share {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  margin: 0 0 var(--ldo-spacing-sm);
  line-height: 0;
}

.ldo-single-share-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ldo-touch-target);
  height: var(--ldo-touch-target);
  margin: 0;
  padding: 0;
  color: var(--ldo-text-muted);
  text-decoration: none;
  border-radius: var(--ldo-radius-md);
}

.ldo-single-share-link:hover {
  color: var(--ldo-accent);
  background: var(--ldo-accent-soft);
}

/*
 * アイコン寸法は px 固定（rem は本番で html の font-size が大きいと膨らむ）。
 * svg に width:100% を当てるプラグイン・テーマCSSへの上書き用に !important。
 */
.ldo-single .ldo-single-share .ldo-single-share-icon {
  width: 22px !important;
  height: 22px !important;
  max-width: 22px !important;
  max-height: 22px !important;
  display: block;
  flex-shrink: 0;
  vertical-align: middle;
}

.ldo-single-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-xs);
  align-items: center;
  font-size: 0.8rem;
  color: var(--ldo-text-muted);
}

.ldo-single-body {
  padding: 0 var(--ldo-spacing-md) var(--ldo-spacing-md);
}

.ldo-single-content {
  font-size: 0.96rem;
  color: var(--ldo-text);
}

.ldo-single-content p {
  margin: 0 0 1.1em;
}

.ldo-single-content h2,
.ldo-single-content h3,
.ldo-single-content h4 {
  margin-top: 1.6em;
  margin-bottom: 0.7em;
}

.ldo-single-content a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.ldo-single-content code {
  font-family: var(--ldo-font-mono);
  font-size: 0.85em;
  background: #f3f4f6;
  border-radius: var(--ldo-radius-sm);
  padding: 0.12em 0.35em;
}

.ldo-single-content pre {
  font-family: var(--ldo-font-mono);
  font-size: 0.85rem;
  background: #f3f4f6;
  border-radius: var(--ldo-radius-md);
  border: 1px solid var(--ldo-border-subtle);
  padding: var(--ldo-spacing-sm) var(--ldo-spacing-md);
  overflow-x: auto;
}

.ldo-single-tags {
  margin-top: var(--ldo-spacing-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-xs);
}

.ldo-single-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  font-size: 0.75rem;
  color: var(--ldo-text-muted);
  background: #f9fafb;
}

.ldo-single-tag:hover {
  border-color: var(--ldo-accent-soft);
  color: var(--ldo-accent);
}

.ldo-related {
  margin-top: var(--ldo-spacing-lg);
  padding: var(--ldo-spacing-md) var(--ldo-spacing-md) var(--ldo-spacing-lg);
  border-top: 1px solid var(--ldo-border-subtle);
}

.ldo-related-heading {
  margin: 0 0 var(--ldo-spacing-sm);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ldo-text-muted);
}

.ldo-related-grid {
  display: flex;
  flex-direction: column;
  gap: var(--ldo-spacing-sm);
}

.ldo-related-card {
  padding: var(--ldo-spacing-sm) var(--ldo-spacing-sm);
  border-radius: var(--ldo-radius-md);
  border: 1px solid var(--ldo-border-subtle);
  background: #f9fafb;
}

.ldo-related-card:hover {
  border-color: var(--ldo-accent-soft);
  background: #eef2ff;
}

.ldo-related-title {
  font-size: 0.9rem;
}

.ldo-related-meta {
  margin-top: 2px;
  font-size: 0.76rem;
  color: var(--ldo-text-muted);
}

.ldo-author {
  margin-top: var(--ldo-spacing-lg);
  padding: var(--ldo-spacing-md);
  border-radius: var(--ldo-radius-lg);
  background: #ffffff;
  border: 1px solid var(--ldo-border-subtle);
  display: flex;
  gap: var(--ldo-spacing-md);
  align-items: flex-start;
}

.ldo-author-avatar img {
  border-radius: 999px;
  box-shadow: 0 10px 25px rgba(148, 163, 184, 0.5);
}

.ldo-author-body {
  flex: 1;
}

.ldo-author-name a {
  font-weight: 600;
  color: var(--ldo-text);
}

.ldo-author-bio {
  margin: var(--ldo-spacing-xs) 0 0;
  font-size: 0.86rem;
  color: var(--ldo-text-muted);
}

.ldo-author-links {
  margin-top: var(--ldo-spacing-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--ldo-spacing-sm);
  align-items: center;
}

.ldo-author-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ldo-touch-target);
  height: var(--ldo-touch-target);
  color: var(--ldo-text-muted);
  border-radius: var(--ldo-radius-md);
}

.ldo-author-link:hover {
  color: var(--ldo-accent);
}

.ldo-author-icon {
  width: 22px;
  height: 22px;
}

@media (min-width: 720px) {
  .ldo-single-title {
    font-size: 1.8rem;
  }
}

/* Footer */
.ldo-footer {
  border-top: 1px solid var(--ldo-border-subtle);
  padding: var(--ldo-spacing-lg) var(--ldo-spacing-md);
  margin-top: auto;
  color: var(--ldo-text-muted);
  font-size: 0.85rem;
}

.ldo-footer-inner {
  max-width: var(--ldo-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--ldo-spacing-sm);
}

.ldo-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ldo-spacing-xs);
}

.ldo-footer-links a {
  color: var(--ldo-text-muted);
}

.ldo-footer-links a:hover {
  color: var(--ldo-accent);
}

.ldo-footer-sep {
  color: var(--ldo-border-subtle);
}

.ldo-footer-copy {
  font-size: 0.8rem;
}

/* Mobile-First Adjustments */
@media (max-width: 599px) {
  .ldo-article {
    padding: var(--ldo-spacing-sm);
  }

  .ldo-article-title {
    font-size: 0.78rem;
  }

  .ldo-nav-list {
    justify-content: flex-start;
  }
}

/* 一定幅以下: トップ・カテゴリ・月別をヘッダー右から隠し、ハンバーガーを表示＋ヘッダー sticky */
@media (max-width: 640px) {
  /* ヘッダーだけ画面端まで白（.ldo-shell の余白で「四角に囲まれた」見え方を防ぐ） */
  .ldo-shell {
    padding-top: 0;
    padding-left: 0;
    padding-right: 0;
  }

  .ldo-main {
    padding-left: var(--ldo-spacing-md);
    padding-right: var(--ldo-spacing-md);
  }

  /* 記事一覧: ヘッダー直下をグリッドの gap と同じにする */
  .ldo-main > .ldo-article-list {
    margin-top: var(--ldo-spacing-md);
  }

  /* スクロール追従（641px 以上では下のメディアで解除） */
  .ldo-header {
    position: sticky;
    top: 0;
    z-index: 1002;
    isolation: isolate;
    padding-top: calc(env(safe-area-inset-top, 0px) + var(--ldo-spacing-md));
    padding-left: var(--ldo-spacing-md);
    padding-right: var(--ldo-spacing-md);
    background: var(--ldo-surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: 0 1px 0 rgba(212, 220, 232, 0.65);
  }

  .ldo-header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .ldo-header-right {
    display: none;
  }

  .ldo-header-toggle {
    display: flex;
  }

  /*
   * バックドロップをヘッダー下端より下だけに限定。
   * ヘッダー背面に blur / 半透明が乗らず、閉じているときと同じ body グラデのまま見える。
   */
  .ldo-overlay-backdrop {
    top: var(--ldo-overlay-backdrop-top-mobile);
    right: 0;
    bottom: 0;
    left: 0;
  }

  /* オーバーレイのパネル内余白を増やして、X のすぐ下に検索ボックスが来るようにする */
  body.ldo-overlay-open #ldo-menu-overlay .ldo-overlay-panel {
    padding-top: calc(var(--ldo-spacing-lg) + 7.5rem);
  }
}

/* 641px 以上: sticky 解除（640px 丁度では max-width ルールと重なるためここで上書き） */
@media (min-width: 641px) {
  .ldo-header {
    position: relative;
    top: auto;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
  }
}

/* 一定幅以上: ロゴとナビを左右に並べる */
@media (min-width: 640px) {
  .ldo-header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--ldo-spacing-lg);
  }

  .ldo-header-left {
    flex-direction: column;
    align-items: flex-start;
  }

  .ldo-header-right {
    width: auto;
    flex-wrap: nowrap;
    align-items: center;
    gap: var(--ldo-spacing-md) var(--ldo-spacing-lg);
  }

  .ldo-nav {
    margin-top: 0;
    flex-shrink: 0;
  }

  .ldo-header-toggle {
    display: none;
  }
}

@media (min-width: 900px) {
  .ldo-article-title {
    font-size: 0.88rem;
  }
}