:root {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --primary: #1e3a8a;
  --primary-hover: #172554;
  --primary-light: #eff6ff;
  --danger: #b91c1c;
  --danger-hover: #991b1b;
  --danger-light: #fef2f2;
  --success: #15803d;
  --success-light: #f0fdf4;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", "Meiryo", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 15px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand .brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

.brand-icon {
  color: var(--primary);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
  text-decoration: none;
}

.admin-entry-link {
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
}

.logout-link {
  color: var(--danger);
}
.logout-link:hover {
  background-color: var(--danger-light);
  color: var(--danger-hover);
}

.site-main {
  flex: 1;
}

.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 1.75rem 1.5rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.cache-badge {
  font-size: 0.75rem;
  color: var(--success);
  background-color: var(--success-light);
  border: 1px solid #bbf7d0;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-weight: 500;
}

.portal-hero {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 3.5rem 1.5rem;
}

.portal-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.hero-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero-description {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.portal-content {
  padding: 3rem 1.5rem;
}

.documents-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.doc-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.doc-card:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
}

.doc-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.doc-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.doc-dates {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.doc-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.doc-card-title a {
  color: var(--text-main);
  text-decoration: none;
}
.doc-card-title a:hover {
  color: var(--primary);
}

.doc-card-desc {
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.doc-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.doc-slug-path {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text-subtle);
}

.btn-read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
}
.btn-read-more:hover {
  text-decoration: underline;
}

.page-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.breadcrumbs {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-separator {
  color: var(--text-subtle);
}

.breadcrumb-current {
  color: var(--text-main);
  font-weight: 500;
}

.page-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  margin-bottom: 2.5rem;
}

.page-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.status-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  background-color: var(--success-light);
  border: 1px solid #bbf7d0;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
}

.date-group {
  display: flex;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.date-group strong {
  color: var(--text-main);
  font-weight: 600;
}

.page-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.page-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.page-actions {
  display: flex;
  gap: 0.75rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  padding: 0.4rem 0.75rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
}

.action-btn:hover {
  background-color: var(--bg-subtle);
  border-color: #cbd5e1;
}

.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3.5rem;
  align-items: start;
}

.page-sidebar {
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
}

.toc-wrapper {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.toc-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.toc-item.level-3 {
  padding-left: 0.85rem;
}

.toc-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  display: block;
  line-height: 1.4;
  padding: 0.2rem 0;
  transition: color 0.15s ease;
}

.toc-link:hover, .toc-link.active {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.page-article-content {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem 3rem;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.markdown-body {
  font-size: 15px;
  line-height: 1.85;
  color: #334155;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--text-main);
  font-weight: 700;
  scroll-margin-top: 5rem;
}

.markdown-body h1 {
  font-size: 1.75rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.markdown-body h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-color);
}

.markdown-body h3 {
  font-size: 1.1rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

.markdown-body p {
  margin-bottom: 1.25rem;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.markdown-body li {
  margin-bottom: 0.4rem;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  text-align: left;
}

.markdown-body th {
  background-color: var(--bg-subtle);
  font-weight: 600;
  color: var(--text-main);
}

.markdown-body blockquote {
  border-left: 4px solid var(--border-focus);
  padding: 0.6rem 1rem;
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.page-bottom-nav {
  margin-top: 2.5rem;
}

.btn-back-to-index {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}
.btn-back-to-index:hover {
  color: var(--primary);
}

.admin-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.admin-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.admin-subtitle {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-top: 0.2rem;
}

.back-link {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.back-link:hover {
  color: var(--primary);
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.admin-table-card {
  overflow: hidden;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.admin-table th {
  background-color: var(--bg-subtle);
  padding: 0.85rem 1.25rem;
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-color);
}

.admin-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
  vertical-align: middle;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background-color: #fafbfc;
}

.page-list-title {
  color: var(--text-main);
  font-size: 0.95rem;
}

.page-list-desc {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.2rem;
}

.slug-code {
  font-family: var(--font-mono);
  background-color: var(--bg-subtle);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  color: #0369a1;
}

.date-cell {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.badge-published {
  color: var(--success);
  background-color: var(--success-light);
  border: 1px solid #bbf7d0;
}

.badge-draft {
  color: #b45309;
  background-color: #fef3c7;
  border: 1px solid #fde68a;
}

.action-buttons {
  display: inline-flex;
  gap: 0.4rem;
}

.inline-form {
  display: inline;
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  line-height: 1.2;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--bg-subtle);
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-secondary:hover {
  background-color: #e2e8f0;
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-muted);
}
.btn-outline:hover {
  background-color: var(--bg-subtle);
  color: var(--text-main);
}

.btn-danger {
  background-color: #fff;
  border-color: #fca5a5;
  color: var(--danger);
}
.btn-danger:hover {
  background-color: var(--danger-light);
  border-color: var(--danger);
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.alert {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.alert-error {
  background-color: var(--danger-light);
  color: var(--danger);
  border: 1px solid #fecaca;
}

.alert-success {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.editor-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.75rem;
  align-items: start;
}

.form-card {
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.required {
  color: var(--danger);
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: inherit;
  font-size: 0.925rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-main);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-control-lg {
  font-size: 1.15rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-col {
  flex: 1;
}

.form-col-sm {
  width: 120px;
}

.form-hint {
  font-size: 0.775rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  display: block;
}

.input-prefix-group {
  display: flex;
  align-items: center;
}

.input-prefix {
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.input-prefix-group .form-control {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.editor-toolbar {
  display: flex;
  gap: 0.35rem;
}

.tool-btn {
  padding: 0.3rem 0.6rem;
  font-size: 0.775rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
}

.tool-btn:hover {
  background-color: #e2e8f0;
  color: var(--text-main);
}

.active-tab-btn {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.active-tab-btn:hover {
  background-color: var(--primary-hover);
  color: #fff;
}

.code-editor {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  resize: vertical;
}

.pane-preview {
  min-height: 480px;
  max-height: 700px;
  overflow-y: auto;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
}

.preview-placeholder {
  color: var(--text-subtle);
  text-align: center;
  padding: 3rem 0;
}

.publish-card {
  padding: 1.5rem;
  position: sticky;
  top: 5rem;
}

.sidebar-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.radio-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin-bottom: 1rem;
  cursor: pointer;
  font-size: 0.875rem;
}

.radio-label input[type="radio"] {
  margin-top: 0.25rem;
}

.publish-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
}

.auth-container {
  min-height: calc(100vh - 160px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.35rem;
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
}

.empty-cell {
  padding: 3rem 1rem !important;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .page-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .page-sidebar {
    position: static;
    max-height: none;
  }
  .editor-layout {
    grid-template-columns: 1fr;
  }
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-article-content {
    padding: 1.5rem;
  }
  .form-row {
    flex-direction: column;
    gap: 0;
  }
  .form-col-sm {
    width: 100%;
  }
  .header-container {
    flex-direction: column;
    gap: 0.75rem;
  }
  .hero-title {
    font-size: 1.6rem;
  }
  .page-title {
    font-size: 1.75rem;
  }
}