/* ==========================================================================
   Blog — Notion Design System
   バイオロジカル・エイジ・テスティング ブログ
   ========================================================================== */

/* ==========================================================================
   Notion Design System Variables
   ========================================================================== */
:root {
  /* Typography */
  --notion-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;

  /* Colors - Notion Palette */
  --notion-bg: #f6f5f4;           /* Warm White */
  --notion-surface: #ffffff;       /* Pure White */
  --notion-text-primary: rgba(0, 0, 0, 0.95);   /* Near-Black */
  --notion-text-secondary: rgba(0, 0, 0, 0.65); /* Secondary Text */
  --notion-text-tertiary: rgba(0, 0, 0, 0.45);  /* Tertiary Text */
  --notion-text: rgba(0, 0, 0, 0.95);
  --notion-accent: #0075de;        /* Notion Blue */
  --notion-accent-hover: #005fb8;  /* Notion Blue Hover */
  --notion-blue: #0075de;
  --notion-blue-hover: #005fb8;
  --notion-border: rgba(0, 0, 0, 0.1);   /* Whisper Border */
  --notion-border-hover: rgba(0, 0, 0, 0.2); /* Border Hover */

  /* Shadows - 4-5 layer low opacity stack */
  --notion-shadow-sm:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 2px 4px rgba(0, 0, 0, 0.04);
  --notion-shadow-md:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 2px 4px rgba(0, 0, 0, 0.04),
    0 4px 8px rgba(0, 0, 0, 0.04);
  --notion-shadow-lg:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 2px 4px rgba(0, 0, 0, 0.04),
    0 4px 8px rgba(0, 0, 0, 0.04),
    0 8px 16px rgba(0, 0, 0, 0.04);
  --notion-shadow-xl:
    0 1px 2px rgba(0, 0, 0, 0.04),
    0 2px 4px rgba(0, 0, 0, 0.04),
    0 4px 8px rgba(0, 0, 0, 0.04),
    0 8px 16px rgba(0, 0, 0, 0.04),
    0 16px 32px rgba(0, 0, 0, 0.04);

  /* Spacing - 8px base unit */
  --notion-spacing-xs: 8px;
  --notion-spacing-sm: 16px;
  --notion-spacing-md: 24px;
  --notion-spacing-lg: 32px;
  --notion-spacing-xl: 48px;
  --notion-spacing-2xl: 64px;
  --notion-spacing-3xl: 96px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;

  /* Layout */
  --notion-max-width: 1200px;
  --notion-content-width: 720px;
  --notion-content-with-sidebar: 960px;
  --notion-sidebar-width: 320px;
  --sidebar-width: 320px;
  --max-width: 1200px;
  --content-width: 720px;
  --header-height: 70px;

  /* Borders */
  --notion-radius: 4px;  /* Subtle rounding */
  --notion-radius-sm: 4px;
  --notion-radius-md: 8px;
  --notion-radius-lg: 12px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --notion-transition: all 0.2s ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--notion-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--notion-text-primary);
  background-color: var(--notion-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--notion-accent-hover);
  text-decoration: underline;
}

/* ==========================================================================
   Skip Link
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--notion-accent);
  color: #ffffff;
  padding: var(--notion-spacing-xs) var(--notion-spacing-sm);
  z-index: 10000;
  font-weight: 500;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* ==========================================================================
   Reading Progress
   ========================================================================== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--notion-accent);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ==========================================================================
   Header - Notion Style (Consistent with main site)
   ========================================================================== */
.site-header {
  background: var(--notion-surface);
  border-bottom: 1px solid var(--notion-border);
  position: sticky;
  top: 0;
  z-index: 999;
  padding: var(--notion-spacing-sm) 0;
}

.header-container {
  max-width: var(--notion-max-width);
  margin: 0 auto;
  padding: 0 var(--notion-spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo-main {
  font-family: var(--notion-font);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--notion-accent);
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--notion-text-secondary);
  letter-spacing: 0.5px;
  margin-top: -2px;
}

.nav-menu {
  display: flex;
  gap: var(--notion-spacing-xs);
  list-style: none;
  align-items: center;
  flex-wrap: wrap;
}

.nav-item a {
  color: var(--notion-text-secondary);
  font-size: 0.9rem;
  padding: var(--notion-spacing-xs) var(--notion-spacing-sm);
  border-radius: var(--notion-radius);
  font-weight: 500;
}

.nav-item a:hover {
  background: var(--notion-bg);
  color: var(--notion-text-primary);
  text-decoration: none;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--notion-spacing-sm);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--notion-text-primary);
  margin: 5px 0;
  border-radius: 2px;
}

/* ==========================================================================
   Main Blog Layout - 2 Column (Notion Style)
   ========================================================================== */
.blog-layout,
.blog-container {
  display: grid;
  grid-template-columns: 1fr var(--notion-sidebar-width);
  gap: var(--notion-spacing-2xl);
  max-width: var(--notion-max-width);
  margin: 0 auto;
  padding: var(--notion-spacing-2xl) var(--notion-spacing-md);
  min-height: calc(100vh - var(--header-height) - 200px);
}

.blog-main {
  min-width: 0;
}

.blog-sidebar {
  min-width: 0;
}

.blog-main {
  min-width: 0;
}

/* ============================================
   Blog Index Page
   ============================================ */
.blog-index-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--notion-border);
}

.blog-index-header h1 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--notion-text);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.blog-index-header p {
  font-size: 1.1rem;
  color: var(--notion-text-secondary);
  line-height: 1.6;
}

/* Blog Grid for Article Cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

/* Blog Card - Notion Style */
.blog-card {
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.2s ease;
  box-shadow: var(--notion-shadow-sm);
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--notion-shadow-lg);
  border-color: var(--notion-border-hover);
  text-decoration: none;
}

.card-thumb {
  position: relative;
  padding-top: 56.25%; /* 16:9 aspect ratio */
  overflow: hidden;
  background: linear-gradient(135deg, #e8e8e8 0%, #f0f0f0 100%);
}

.card-thumb img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.blog-card:hover .card-thumb img {
  transform: scale(1.03);
}

.card-body {
  padding: var(--spacing-md);
}

.card-body time {
  display: block;
  font-size: 0.8rem;
  color: var(--notion-text-tertiary);
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.card-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--notion-text);
  margin: 0 0 var(--spacing-xs);
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-body p {
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Empty State */
.blog-empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md);
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-lg);
}

.blog-empty-state h2 {
  font-size: 1.5rem;
  color: var(--notion-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.blog-empty-state p {
  color: var(--notion-text-tertiary);
}

/* ============================================
   Article Template Page
   ============================================ */
.blog-article-header {
  margin-bottom: var(--spacing-2xl);
}

.blog-article-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--notion-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9rem;
  color: var(--notion-text-tertiary);
}

.blog-meta time {
  font-weight: 500;
}

.blog-read-time {
  padding: 2px 8px;
  background: rgba(0, 117, 222, 0.08);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Article Hero Image */
.blog-hero-image {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--notion-border);
}

/* Article Body Content */
.blog-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--notion-text);
}

.blog-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--notion-text);
  margin: var(--spacing-2xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--notion-border);
  letter-spacing: -0.015em;
}

.blog-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--notion-text);
  margin: var(--spacing-xl) 0 var(--spacing-sm);
  letter-spacing: -0.01em;
}

.blog-body h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--notion-text);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.blog-body p {
  margin-bottom: var(--spacing-md);
  color: var(--notion-text);
}

.blog-body a {
  color: var(--notion-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.blog-body a:hover {
  color: var(--notion-blue-hover);
}

.blog-body ul,
.blog-body ol {
  margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-lg);
  padding: 0;
}

.blog-body li {
  color: var(--notion-text);
  margin-bottom: var(--spacing-xs);
  line-height: 1.7;
}

.blog-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  border: 1px solid var(--notion-border);
}

.blog-body blockquote {
  border-left: 3px solid var(--notion-blue);
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-md);
  color: var(--notion-text-secondary);
  font-style: italic;
  background: rgba(0, 117, 222, 0.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.blog-body strong {
  color: var(--notion-text);
  font-weight: 600;
}

.blog-body code {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.blog-body pre {
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.blog-body pre code {
  background: none;
  padding: 0;
}

/* Highlight/Data Boxes */
.highlight-box,
.data-reference {
  background: rgba(0, 117, 222, 0.04);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.highlight-box h3,
.data-reference h3 {
  margin-top: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--notion-text);
}

/* Table of Contents (In-content) */
.toc-container {
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  font-size: 0.95rem;
}

.toc-container summary {
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--notion-text);
  list-style: none;
}

.toc-container summary::-webkit-details-marker {
  display: none;
}

.toc-list {
  margin: 0;
  padding-left: var(--spacing-md);
}

.toc-list li {
  margin: var(--spacing-xs) 0;
  line-height: 1.5;
}

.toc-list .toc-sub {
  margin-left: var(--spacing-md);
  font-size: 0.875rem;
  list-style-type: disc;
}

.toc-list a {
  color: var(--notion-blue);
  text-decoration: none;
}

.toc-list a:hover {
  text-decoration: underline;
}

/* Share Links */
.share-links {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--notion-border);
}

.share-links-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--notion-text);
  margin-bottom: var(--spacing-sm);
}

.share-buttons {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.share-buttons a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-sm);
  color: var(--notion-text);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.15s ease;
  background: var(--notion-surface);
  text-decoration: none;
}

.share-buttons a:hover {
  border-color: var(--notion-blue);
  color: var(--notion-blue);
  background: rgba(0, 117, 222, 0.04);
  text-decoration: none;
}

/* ============================================
   Sidebar
   ============================================ */
.blog-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-lg));
  align-self: start;
}

.blog-toc,
.blog-banners {
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--notion-shadow-sm);
}

.blog-toc p,
.blog-banners p {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--notion-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--notion-border);
}

/* Sidebar Widget Styles */
.sidebar-widget,
.sidebar-section {
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--notion-shadow-sm);
}

.sidebar-widget .widget-title,
.sidebar-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 var(--spacing-sm);
  color: var(--notion-text);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--notion-border);
  letter-spacing: -0.01em;
}

.widget-list,
.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.widget-list li,
.sidebar-nav li {
  margin-bottom: var(--spacing-xs);
}

.widget-list a,
.sidebar-nav a {
  color: var(--notion-text-secondary);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.15s ease;
  display: block;
  padding: 4px 0;
}

.widget-list a:hover,
.sidebar-nav a:hover {
  color: var(--notion-blue);
  text-decoration: none;
}

.widget-content {
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  line-height: 1.6;
}

.widget-content p {
  margin: 0;
}

/* Sidebar Ad/Banner */
.ad-widget,
.sidebar-ad {
  padding: var(--spacing-sm);
  text-align: center;
}

.ad-widget .amazon-banner,
.ad-widget img,
.sidebar-ad img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  transition: opacity 0.15s ease;
}

.ad-widget img:hover,
.sidebar-ad img:hover {
  opacity: 0.9;
}

.ad-widget a,
.sidebar-ad a {
  display: inline-block;
}

/* Pill Badge */
.pill-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 117, 222, 0.08);
  color: var(--notion-blue);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.025em;
}

/* ============================================
   Footer (same structure as main site)
   ============================================ */
.footer {
  background: var(--notion-surface);
  border-top: 1px solid var(--notion-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--notion-text);
  margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--notion-text);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-section p {
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  text-decoration: none;
}

.footer-section a:hover {
  color: var(--notion-blue);
  text-decoration: underline;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--spacing-2xl) auto 0;
  padding: var(--spacing-lg) var(--spacing-md) 0;
  border-top: 1px solid var(--notion-border);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--notion-text-tertiary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 992px) {
  .blog-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .blog-sidebar {
    position: static;
  }
  
  .nav-menu {
    display: none;
  }
  
  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--notion-surface);
    border-bottom: 1px solid var(--notion-border);
    padding: var(--spacing-md);
    box-shadow: var(--notion-shadow-md);
  }
  
  .hamburger {
    display: flex;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .blog-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .logo-main {
    font-size: 1.2rem;
  }
  
  .blog-container {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .card-body {
    padding: var(--spacing-sm);
  }
}

/* ==========================================================================
   Blog Index Layout — 一覧ページ専用 (scoped under .blog-index-layout)
   記事ページ(20YYMMDD-NN.html)のセレクタには影響しないようスコープ化
   ========================================================================== */
.blog-index-hero {
  max-width: var(--notion-max-width);
  margin: 0 auto;
  padding: var(--notion-spacing-2xl) var(--notion-spacing-md) 0;
}

.blog-index-hero .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--notion-accent);
  margin-bottom: var(--notion-spacing-xs);
}

.blog-index-hero h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--notion-text-primary);
  margin-bottom: var(--notion-spacing-sm);
}

.blog-index-hero .blog-index-intro {
  font-size: 1.05rem;
  color: var(--notion-text-secondary);
  line-height: 1.7;
  max-width: 760px;
}

.blog-index-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--notion-spacing-2xl);
  max-width: var(--notion-max-width);
  margin: 0 auto;
  padding: var(--notion-spacing-xl) var(--notion-spacing-md) var(--notion-spacing-3xl);
}

.blog-index-layout .blog-index-main {
  min-width: 0;
}

.blog-index-layout .blog-index-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--notion-spacing-md);
}

/* 一覧カードの見出しを h2 に統一しても h3 と同じ体裁になるよう補完 */
.blog-index-layout .card-body h2 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--notion-text);
  margin: 0 0 var(--spacing-xs);
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 右サイドバー */
.blog-index-sidebar {
  min-width: 0;
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-lg));
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: var(--notion-spacing-lg);
}

.blog-index-sidebar .sidebar-block {
  background: var(--notion-surface);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-md);
  padding: var(--notion-spacing-md);
  box-shadow: var(--notion-shadow-sm);
}

.blog-index-sidebar .sidebar-block > h2 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--notion-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--notion-spacing-sm);
  padding-bottom: var(--notion-spacing-xs);
  border-bottom: 1px solid var(--notion-border);
}

.blog-index-sidebar .sidebar-ad {
  text-align: center;
  padding: var(--notion-spacing-sm);
}

.blog-index-sidebar .sidebar-ad img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.blog-index-sidebar .sidebar-ad .amazon-banner a {
  display: block;
  padding: var(--notion-spacing-sm);
  border: 1px dashed var(--notion-border-hover);
  border-radius: var(--radius-sm);
  color: var(--notion-accent);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--notion-transition);
}

.blog-index-sidebar .sidebar-ad .amazon-banner a:hover {
  background: rgba(0, 117, 222, 0.06);
  text-decoration: none;
}

.blog-index-sidebar .sidebar-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.blog-index-sidebar .sidebar-links li {
  margin-bottom: var(--notion-spacing-xs);
}

.blog-index-sidebar .sidebar-links a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  text-decoration: none;
}

.blog-index-sidebar .sidebar-links a:hover {
  color: var(--notion-blue);
  text-decoration: none;
}

.blog-index-sidebar .sidebar-about {
  font-size: 0.9rem;
  color: var(--notion-text-secondary);
  line-height: 1.65;
  margin: 0;
}

@media (max-width: 1200px) {
  .blog-index-layout .blog-index-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991px) {
  .blog-index-layout {
    grid-template-columns: 1fr;
    gap: var(--notion-spacing-xl);
  }
  .blog-index-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .blog-index-layout .blog-index-cards {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .header,
  .footer,
  .blog-sidebar,
  .reading-progress,
  .share-links {
    display: none;
  }
  
  .blog-container {
    display: block;
    padding: 0;
  }
  
  .blog-main {
    max-width: 100%;
  }
  
  body {
    background: #ffffff;
    color: #000000;
  }
}

/* Mobile news-commentary readability baseline (shared site-local rule). */
@media (max-width: 768px) {
  .blog-main, .blog-container, .two-col-layout { min-width: 0; }
  .article-detail, .blog-article, .article-body { min-width: 0; }
  .article-detail .article-body, .blog-article { padding-inline: 16px; }
  .article-content {
    font-size: 1rem;
    line-height: 1.85;
    overflow-wrap: anywhere;
  }
  .article-content h2 { font-size: clamp(1.25rem, 6vw, 1.45rem); line-height: 1.4; }
  .article-content h3 { font-size: clamp(1.12rem, 5vw, 1.25rem); line-height: 1.45; }
  .article-content :is(img, iframe, video) { max-width: 100%; height: auto; }
  .article-content table { display: block; max-width: 100%; overflow-x: auto; }
  .sidebar, .blog-sidebar { position: static; order: 2; }
}

/* Blog index card grid fallback: scoped to index-only markup. */
.blog-index-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
}

.blog-index-main { min-width: 0; }

.blog-index-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.blog-index-grid .blog-card { display: flex; flex-direction: column; }

.blog-index-grid .blog-card > a {
  color: inherit;
  text-decoration: none;
}

.blog-index-grid .card-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-index-grid .card-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-index-grid .card-body { padding: 24px; }

@media (max-width: 1200px) {
  .blog-index-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  .blog-index-layout { grid-template-columns: 1fr; }
  .blog-index-grid { grid-template-columns: 1fr; }
}
/* Mobile article reading width: keep outer page gutters, remove duplicated inner gutters. */
@media (max-width: 768px) {
  .article-content,
  .article-detail .article-body,
  .blog-article,
  .main-content > article.main-content {
    padding-left: 0;
    padding-right: 0;
  }
  /* Cap article-panel padding without removing deliberate card framing. */
  .article-panel,
  .article-main,
  .post-content,
  .article-detail {
    padding-left: min(16px, 4vw);
    padding-right: min(16px, 4vw);
  }
  .article-body { padding-left: 0; padding-right: 0; }
}