:root {
  --bg-primary: #0f1015;
  --bg-secondary: #171922;
  --bg-tertiary: #20232f;
  --bg-card: #1a1c26;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-primary: #ffcc00;
  --accent-glow: rgba(255, 204, 0, 0.2);
  --accent-blue: #38bdf8;
  --border-color: #2a2e3d;
  --border-hover: #3f465c;
  --sidebar-width: 290px;
  --font-sans:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --font-display: "Dela Gothic One", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.wiki-theme {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* リンク */
a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: #7dd3fc;
  text-decoration: underline;
}

/* レイアウト */
.wiki-container {
  display: flex;
  min-height: 100vh;
}

/* サイドバー */
.wiki-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--border-color);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  text-decoration: none;
}
.site-logo:hover {
  text-decoration: none;
}

.logo-icon {
  flex-shrink: 0;
  border-radius: 6px;
  box-shadow: 0 0 10px rgba(255, 204, 0, 0.15);
}

.logo-title {
  font-family: var(--font-display);
  font-size: 21px;
  letter-spacing: 0.8px;
  color: #ffffff;
}

.site-desc {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 0 10px 8px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-item {
  display: flex;
  flex-direction: column;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.15s;
}

.nav-link:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  text-decoration: none;
}

.nav-link.active {
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
  font-weight: 700;
}

.nav-indicator {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: transparent;
}
.nav-link.active .nav-indicator {
  background-color: var(--accent-primary);
}

.nav-sublist {
  list-style: none;
  padding-left: 14px;
  margin-top: 2px;
  border-left: 1px solid var(--border-color);
  margin-left: 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-sublink {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 5px;
  color: var(--text-dim);
  font-size: 12.5px;
}
.nav-sublink:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  text-decoration: none;
}
.nav-sublink.active {
  color: var(--accent-primary);
  background-color: rgba(255, 204, 0, 0.08);
  font-weight: 600;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-about {
  font-size: 11.5px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.about-lead {
  color: var(--text-muted);
}

.about-author {
  color: var(--text-muted);
}

.author-link {
  color: var(--accent-primary);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.author-link:hover {
  color: #fde047;
}

.about-disclaimer {
  font-size: 10.5px;
  color: #64748b;
  line-height: 1.5;
}

.scrapbox-source-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--text-dim);
  padding: 6px 10px;
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  transition: all 0.15s ease;
}
.scrapbox-source-link:hover {
  color: var(--text-main);
  background-color: #282c3c;
  text-decoration: none;
}

/* メインエリア */
.wiki-main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
  padding: 40px 32px 80px;
}

.wiki-content-wrapper {
  width: 100%;
  max-width: 1160px;
}

.wiki-layout-columns {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  width: 100%;
}

.wiki-article {
  flex: 1;
  min-width: 0;
  max-width: 840px;
}

/* パンくず */
.wiki-breadcrumb {
  margin-bottom: 20px;
  font-size: 13px;
}
.breadcrumb-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb-separator {
  color: var(--text-dim);
  margin: 0 4px;
}
.breadcrumb-item.current {
  color: var(--text-muted);
}

/* 記事ヘッダー */
.article-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.badge-section {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  background: rgba(255, 204, 0, 0.15);
  color: var(--accent-primary);
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-parent {
  display: inline-block;
  font-size: 11px;
  background: var(--bg-tertiary);
  color: var(--text-dim);
  padding: 2px 8px;
  border-radius: 4px;
}

.article-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 400;
  color: #f8fafc;
  line-height: 1.4;
  letter-spacing: 0.8px;
  margin: 0;
}

.article-edit-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  width: 24px;
  height: 24px;
  margin-left: 8px;
  border-radius: 4px;
  color: var(--text-dim);
  opacity: 0.18;
  background: transparent;
  border: none;
  transition:
    opacity 0.15s ease,
    color 0.15s ease,
    background-color 0.15s ease;
  text-decoration: none;
}

.article-title:hover .article-edit-link {
  opacity: 0.5;
}

.article-edit-link:hover {
  opacity: 1;
  color: var(--accent-primary);
  background-color: rgba(255, 204, 0, 0.08);
}

.article-edit-link:active {
  transform: scale(0.95);
}

/* スクリーンリーダー用不可視テキスト */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 記事本文（Scrapboxツリースタイル） */
.wiki-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 15.5px;
}

.wiki-empty-line {
  height: 12px;
}

.wiki-line {
  display: flex;
  align-items: flex-start;
  position: relative;
  line-height: 1.75;
}

/* インデントレベルに応じたマージンとガイド線 */
.wiki-line.indent-0 {
  padding-left: 0;
  font-weight: 500;
}
.wiki-line.indent-1 {
  padding-left: 20px;
}
.wiki-line.indent-2 {
  padding-left: 40px;
}
.wiki-line.indent-3 {
  padding-left: 60px;
}
.wiki-line.indent-4 {
  padding-left: 80px;
}
.wiki-line.indent-5 {
  padding-left: 100px;
}
.wiki-line.indent-6 {
  padding-left: 120px;
}
.wiki-line.indent-7 {
  padding-left: 140px;
}
.wiki-line.indent-8 {
  padding-left: 160px;
}

.wiki-line .bullet {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-dim);
  margin-top: 10px;
  margin-right: 10px;
  flex-shrink: 0;
}
.wiki-line.indent-1 .bullet {
  background: var(--accent-primary);
}
.wiki-line.indent-2 .bullet {
  background: var(--accent-blue);
}

.wiki-line-content {
  flex: 1;
  word-break: break-word;
}

/* 装飾スタイル */
.wiki-bold {
  font-weight: 700;
  color: #ffffff;
}

.wiki-italic {
  font-style: italic;
}

.wiki-strike {
  text-decoration: line-through;
  color: var(--text-dim);
}

.wiki-underline {
  text-decoration: underline;
  text-decoration-color: var(--accent-primary);
  text-underline-offset: 3px;
}

.wiki-size-2 {
  font-size: 1.15em;
  font-weight: 700;
}
.wiki-size-3 {
  font-size: 1.3em;
  font-weight: 700;
}

.wiki-link {
  color: var(--accent-blue);
  text-decoration: none;
  border-bottom: 1px dotted rgba(56, 189, 248, 0.4);
}
.wiki-link:hover {
  color: #7dd3fc;
  border-bottom-color: #7dd3fc;
}

.wiki-tag {
  display: inline-block;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 12px;
  padding: 1px 7px;
  border-radius: 4px;
  margin-right: 4px;
}

.wiki-image-wrapper {
  display: block;
  margin: 12px 0;
}

.wiki-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.wiki-inline-code {
  background: var(--bg-tertiary);
  color: #f43f5e;
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 4px;
}

.wiki-codeblock {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin: 12px 0;
  overflow: hidden;
}
.wiki-codeblock pre {
  padding: 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: #f1f5f9;
}
.code-filename {
  background: #11131a;
  padding: 6px 12px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-color);
}

/* サブページ一覧（親ページ用リスト） */
.subpage-index {
  margin-top: 12px;
}
.subpage-index-title {
  font-family: var(--font-display);
  font-size: 18px;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.subpage-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.subpage-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.subpage-card:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-primary);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  text-decoration: none;
}
.subpage-card-main {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}
.subpage-card-title {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
}
.subpage-line-count {
  font-size: 11.5px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.subpage-card-arrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-left: 16px;
}
.subpage-card:hover .subpage-card-arrow {
  color: #ffffff;
}

/* ページャー */
.wiki-pager {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.pager-card {
  display: flex;
  flex-direction: column;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.15s ease;
}
.pager-card:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-primary);
  text-decoration: none;
}
.pager-next .pager-card {
  text-align: right;
}

.pager-direction {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 4px;
}
.pager-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

/* エラーボックス */
.wiki-error-box {
  background: #2b1116;
  border: 1px solid #7f1d1d;
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  color: #fca5a5;
}
.btn-retry {
  display: inline-block;
  margin-top: 16px;
  background: #ef4444;
  color: #fff;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 700;
}

/* ページ内見出し（h2, h3）とアンカーリンク */
.inpage-heading {
  position: relative;
  scroll-margin-top: 80px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.inpage-heading.inpage-level-2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  color: #ffffff;
  margin-top: 36px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 204, 0, 0.2);
  letter-spacing: 0.6px;
}
.article-title .wiki-bold,
.article-title strong,
.inpage-heading.inpage-level-2 .wiki-bold,
.inpage-heading.inpage-level-2 strong,
.inpage-heading.inpage-level-2 b {
  font-weight: 400;
}
.inpage-heading.inpage-level-3 {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--accent-primary);
  margin-top: 24px;
  margin-bottom: 8px;
  padding-left: 12px;
  border-left: 3px solid var(--accent-primary);
}
.heading-anchor {
  color: var(--text-dim);
  opacity: 0;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9em;
  transition:
    opacity 0.15s ease,
    color 0.15s ease;
  user-select: none;
}
.inpage-heading:hover .heading-anchor {
  opacity: 1;
}
.heading-anchor:hover {
  color: var(--accent-primary);
}
.heading-text {
  flex: 1;
}

/* PC用右側float（Sticky）目次パネル */
.wiki-toc-aside {
  width: 250px;
  flex-shrink: 0;
  position: sticky;
  top: 32px;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding-left: 8px;
}
.wiki-toc-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 1px solid var(--border-color);
  padding-left: 16px;
}
.wiki-toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wiki-toc-title {
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-dim);
  letter-spacing: 1.2px;
}
.wiki-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wiki-toc-item {
  font-size: 12.5px;
  line-height: 1.4;
}
.wiki-toc-item.level-2 {
  font-weight: 600;
}
.wiki-toc-item.level-3 {
  padding-left: 12px;
  font-size: 12px;
}
.wiki-toc-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
  display: block;
}
.wiki-toc-link:hover {
  color: var(--accent-primary);
  text-decoration: none;
}
.wiki-toc-item.active .wiki-toc-link {
  color: var(--accent-primary);
  font-weight: 700;
}
.wiki-toc-footer {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
}
.back-to-top-link {
  font-size: 11.5px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s ease;
}
.back-to-top-link:hover {
  color: var(--text-main);
}

/* モバイル用インライン目次（アコーディオン） */
.mobile-toc-accordion {
  display: none;
  margin-bottom: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}
.mobile-toc-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.mobile-toc-summary::-webkit-details-marker {
  display: none;
}
.mobile-toc-icon {
  font-size: 16px;
}
.mobile-toc-title {
  flex: 1;
}
.mobile-toc-arrow {
  font-size: 10px;
  color: var(--text-dim);
  transition: transform 0.2s ease;
}
.mobile-toc-accordion[open] .mobile-toc-arrow {
  transform: rotate(180deg);
}
.mobile-toc-nav {
  padding: 8px 16px 16px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-primary);
  max-height: 320px;
  overflow-y: auto;
}
.mobile-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mobile-toc-item {
  font-size: 13.5px;
  line-height: 1.4;
}
.mobile-toc-item.level-3 {
  padding-left: 14px;
  font-size: 12.5px;
}
.mobile-toc-link {
  color: var(--text-muted);
  text-decoration: none;
}
.mobile-toc-link:hover {
  color: var(--accent-primary);
}

/* モバイルヘッダー */
.mobile-header {
  display: none;
}

/* レスポンシブ対応 */
@media (max-width: 860px) {
  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 50;
  }
  .menu-btn {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
  }
  .mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-main);
    font-family: var(--font-display);
    font-size: 18px;
    letter-spacing: 0.8px;
    text-decoration: none;
  }

  .wiki-sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease-in-out;
    top: var(--header-height);
  }
  .wiki-sidebar.open {
    transform: translateX(0);
  }
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 35;
  }
  .sidebar-backdrop.open {
    display: block;
  }

  .wiki-main {
    margin-left: 0;
    padding: 24px 16px 60px;
  }
  .wiki-layout-columns {
    display: block;
  }
  .wiki-toc-aside {
    display: none;
  }
  .mobile-toc-accordion {
    display: block;
  }
  .wiki-pager {
    grid-template-columns: 1fr;
  }
}