/* 辞書サイト共通スタイル */

:root {
  --color-text: #222;
  --color-bg: #fff;
  --color-accent: #1a5fb4;
  --color-border: #e0e0e0;
  --max-width: 800px;
  /* 補助テキスト用の色。#777/#999 は白背景でのコントラスト比が
     それぞれ約4.48:1 / 2.85:1 しかなく、WCAG AA(通常文字は4.5:1以上)を
     満たさないため、4.5:1を十分に超える値に変更している。
     --color-muted: #595959 → 約7.0:1 / --color-subtle: #6b6b6b → 約5.3:1 */
  --color-muted: #595959;
  --color-subtle: #6b6b6b;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
}

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

/* CSS-DESIGN-02: モバイルファースト(min-widthを基準に拡張)で統一。
   以下はモバイル(既定)のスタイルとし、デスクトップ向けの上書きは
   本ファイル末尾の @media (min-width: 601px) にまとめる。 */
.site-header {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: 8px;
  flex-direction: column;
  /* 検索バーをスマホ上部に固定表示(改善要望 1・6 対応) */
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
}
.site-title {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--color-text);
}
.header-nav {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--color-subtle);
  order: 2;
  justify-content: center;
}
.header-nav a {
  color: var(--color-subtle);
}
.header-search {
  width: 100%;
  order: 3;
}
.header-search input {
  padding: 10px 12px;
  font-size: 0.95rem;
  min-width: 0;
  border: 1.5px solid var(--color-border);
  border-radius: 6px;
}
.header-search input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.15);
}
.header-search button {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.header-search button:hover {
  background: #14497f;
  border-color: #14497f;
}
.header-search button:active {
  background: #103c69;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-subtle);
  margin-bottom: 16px;
}

.word-header h1 {
  margin-bottom: 4px;
}
.word-header .reading {
  color: var(--color-subtle);
  margin: 0 0 8px;
}
.word-image img {
  max-width: 100%;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #f5f7fa;
  margin-top: 12px;
  border-radius: 4px;
}
.pronunciation audio {
  width: 100%;
  max-width: 360px;
  margin-top: 8px;
}

.detail-cta {
  margin: 32px 0;
  text-align: center;
}
.detail-cta-link {
  display: inline-block;
  padding: 12px 24px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  font-weight: bold;
}
.detail-cta-link:hover {
  background: #eef2fa;
  text-decoration: none;
}

.back-to-simple {
  font-size: 0.9rem;
  margin: 16px 0;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: #eef2fa;
  color: var(--color-accent);
  margin-right: 4px;
}

section {
  margin: 32px 0;
}
section h2 {
  border-left: 4px solid var(--color-accent);
  padding-left: 8px;
}

.word-list,
.categories ul,
.recent ul,
#search-results {
  list-style: none;
  padding: 0;
}
.word-list li,
.recent ul li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.hero {
  text-align: center;
  padding: 40px 0;
}
.hero-lead {
  color: var(--color-subtle);
  margin: 0 auto 20px;
  max-width: 40em;
}
.search-box,
.header-search {
  display: flex;
  gap: 6px;
}
.search-box input,
#search-input {
  flex: 1;
  padding: 16px 18px;
  font-size: 1.1rem;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}
.search-box input:focus,
#search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.15);
}
.search-box button {
  padding: 0 24px;
  font-size: 1.05rem;
  border-radius: 8px;
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.search-box button:hover {
  background: #14497f;
  border-color: #14497f;
}
.search-box button:active {
  background: #103c69;
}

#search-results li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
#search-results .summary {
  color: var(--color-subtle);
  font-size: 0.9rem;
  margin: 4px 0 0;
}
#search-results .result-synonyms {
  color: var(--color-subtle);
  font-size: 0.8rem;
  margin: 2px 0 0;
}
.search-empty-suggestions {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
}
.search-empty-suggestions p {
  margin: 0 0 8px;
  font-size: 0.9rem;
  color: var(--color-subtle);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}
.pagination-info {
  color: var(--color-subtle);
  font-size: 0.9rem;
}

.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--color-subtle);
  font-size: 0.85rem;
}

.footer-nav {
  margin-bottom: 8px;
}
.footer-nav a {
  color: var(--color-muted);
}
.footer-nav-sep {
  margin: 0 8px;
  color: #ccc;
}

.policy-page h2 {
  border-left: 4px solid var(--color-accent);
  padding-left: 8px;
  margin-top: 32px;
}
.policy-page h3 {
  margin-top: 20px;
}
.policy-page hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 32px 0;
}
.policy-page p,
.policy-page .policy-container {
  line-height: 1.9;
}

/* 横スクロール用ユーティリティ(全画面幅で共通。オーバーフローがなければ無害) */
.scroll-x {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.relations,
.related-terms {
  overflow-x: hidden;
}

/* CSS-DESIGN-02: モバイルファースト統一に伴い、デスクトップ向けの上書きは
   ここに集約する(旧: @media (max-width: 600px) によるデスクトップファースト構成)。
   モバイル既定値は .site-header / .header-nav / .header-search / .category-grid の
   各定義を参照。ここでは元の(2026-08-09以前の)デスクトップ表示に戻す値のみを書く。 */
@media (min-width: 601px) {
  .site-header {
    flex-direction: row;
    align-items: center;
    position: static;
    top: auto;
    z-index: auto;
    background: none;
  }
  .header-nav {
    order: 0;
    justify-content: flex-start;
  }
  .header-search {
    width: auto;
    order: 0;
  }

  .category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
  }
  .category-grid li {
    flex: initial;
    width: auto;
  }
}

/* ---- アクセシビリティ ---- */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[role="option"].is-active {
  outline: 3px solid #ff8c00;
  outline-offset: 2px;
}

/* 行間・フォントサイズの統一(改善要望 8) */
p,
li,
.meaning-body {
  font-size: 1rem;
  line-height: 1.9;
}

/* ---- タグ・関連キーワード ---- */

.tag-chip,
.term-chip {
  display: inline-block;
  font-size: 0.8rem;
  padding: 3px 10px;
  margin: 2px 4px 2px 0;
  border-radius: 999px;
  background: #f1f5fb;
  color: var(--color-accent);
  border: 1px solid #dbe6f7;
}
.tag-chip:hover,
.term-chip:hover {
  background: #e3ecf9;
  text-decoration: none;
}

.tag-cloud {
  margin: 12px 0 20px;
}
.tag-list-inline {
  margin: 8px 0 0;
}
.term-chips {
  margin: 0;
}

.badge-category {
  background: #fff4e5;
  color: #b06a00;
}

.quality-score {
  display: inline-block;
  color: #e0a800;
  letter-spacing: 1px;
  font-size: 0.9rem;
  margin-left: 4px;
}

.word-meta {
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.8rem;
  color: var(--color-muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- トップページ: カテゴリカード / ランキング / おすすめ ---- */

/* カテゴリ一覧はモバイル既定で横スクロール化(トップページの情報密度を下げる)。
   デスクトップ向けのグリッド表示は @media (min-width: 601px) を参照 */
.category-grid {
  display: flex;
  grid-template-columns: none;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
}
.category-grid li {
  flex: 0 0 auto;
  width: 160px;
}
.category-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
}
.category-card:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}
.category-card-name {
  font-weight: bold;
}
.category-card .count {
  color: var(--color-muted);
  font-size: 0.85rem;
}
.category-count {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-top: -8px;
}

.ranking-list {
  list-style: none;
  padding: 0;
  counter-reset: none;
}
.ranking-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}
.rank-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.word-card-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}
.word-card {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.recent-by-category-group {
  margin-bottom: 20px;
}
.recent-by-category-group h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}
.recent-by-category-group ul.scroll-x {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  padding: 0 0 8px;
  -webkit-overflow-scrolling: touch;
}
.recent-by-category-group ul.scroll-x li {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  white-space: nowrap;
}

/* ---- 新着語タブ ---- */
.tabs {
  border: none;
  padding: 0;
  margin: 0;
}
.tabs .tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.tab-labels {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 16px;
}
.tab-labels label {
  padding: 8px 18px;
  cursor: pointer;
  color: var(--color-muted);
  border-bottom: 2px solid transparent;
  font-size: 0.95rem;
}
.tab-panel {
  display: none;
}
#tab-by-category:checked ~ .tab-labels label[for="tab-by-category"],
#tab-all:checked ~ .tab-labels label[for="tab-all"] {
  color: var(--color-accent);
  font-weight: bold;
  border-bottom-color: var(--color-accent);
}
#tab-by-category:checked ~ #panel-by-category,
#tab-all:checked ~ #panel-all {
  display: block;
}
.tabs .tab-radio:focus-visible ~ .tab-labels label {
  outline: 2px solid #ff8c00;
  outline-offset: 2px;
}

.word-list-category {
  color: var(--color-subtle);
  font-size: 0.8rem;
  margin-left: 8px;
}

.search-category-filter {
  margin: 16px 0;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}
.search-category-filter legend {
  padding: 0 6px;
  font-size: 0.85rem;
  color: var(--color-subtle);
}
.search-category-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 8px;
}
.filter-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.9rem;
  cursor: pointer;
}
.filter-clear-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.8rem;
  color: var(--color-subtle);
  cursor: pointer;
}
.filter-clear-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---- 検索サジェスト ---- */

.search-input-wrap {
  position: relative;
}
.search-suggestions {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: 20;
  margin: 4px 0 0;
  padding: 4px 0;
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  max-height: 320px;
  overflow-y: auto;
}
.search-suggestions li {
  padding: 8px 12px;
  cursor: pointer;
}
.search-suggestions li:hover,
.search-suggestions li.is-active {
  background: #f1f5fb;
}
.suggest-reading {
  color: var(--color-subtle);
  font-size: 0.85rem;
  margin-left: 6px;
}
.result-category {
  display: inline-block;
  margin-left: 8px;
  font-size: 0.75rem;
  color: var(--color-subtle);
}
mark {
  background: #fff2a8;
  color: inherit;
  padding: 0 1px;
}

.auto-link {
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}

.example-excerpt blockquote {
  margin: 0;
  padding: 12px 16px;
  border-left: 4px solid var(--color-border);
  background: #f8f9fb;
  font-style: normal;
}
.example-excerpt cite {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-style: normal;
}
.example-more {
  margin-top: 8px;
  font-size: 0.9rem;
}

/* ---- 管理者向けレビュー一覧 ---- */
.admin-review-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.admin-review-table th,
.admin-review-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 8px;
  text-align: left;
}

/* ---- 外部関連記事 ---- */
.external-related-articles {
  margin: 28px 0;
  padding: 16px 20px;
  background: #f8fbff;
  border: 1px solid #dbe6f7;
  border-left: 4px solid var(--color-accent);
  border-radius: 8px;
}
.external-related-articles h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--color-accent);
  font-weight: bold;
  border-left: none;
  padding-left: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.external-related-articles h3::before {
  content: "🔗";
  font-size: 1rem;
}
.external-article-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.external-article-item {
  border-bottom: none;
  padding: 0;
}
.external-article-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  background: #fff;
  border: 1px solid #dbe6f7;
  border-radius: 6px;
  color: var(--color-accent);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  gap: 8px;
}
.external-article-link:hover {
  background: #eef4fd;
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(26, 95, 180, 0.08);
  text-decoration: none;
}
.external-article-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.external-article-icon {
  flex-shrink: 0;
  font-size: 0.85rem;
  color: var(--color-subtle);
  opacity: 0.8;
}