/* ============================================================================
   OceanAds Blog – Medium-Inspired Editorial Design
   ============================================================================

   A clean, centered reading experience with generous whitespace,
   serif-forward typography, and minimal UI chrome.

   Fonts: Noto Serif TC (headings + body), Inter (UI)
   Colors: Warm off-white light mode, dark navy dark mode
   ============================================================================ */

/* ============================================================================
   CSS Variables & Theme Configuration
   ============================================================================ */

:root {
  /* Light Mode (Default) */
  --bg-primary: #faf9f7;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f5f3f0;
  --text-primary: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-tertiary: #767676;
  --accent-coral: #e07a5f;
  --accent-light: #f4e4de;
  --border-color: #e8e6e3;
  --shadow-light: 0 1px 3px rgba(26, 26, 26, 0.08);
  --shadow-medium: 0 4px 12px rgba(26, 26, 26, 0.12);

  /* Typography */
  --font-serif: 'Noto Serif TC', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
}

/* Dark Mode */
body.dark-mode {
  --bg-primary: #141824;
  --bg-secondary: #1a1f2e;
  --bg-tertiary: #242d3e;
  --text-primary: #d4dce8;
  --text-secondary: #a8b0c4;
  --text-tertiary: #9ba3b8;
  --border-color: #2a3545;
  --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
  --accent-light: rgba(224, 122, 95, 0.1);
}

/* ============================================================================
   Global Styles & Reset
   ============================================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal),
              color var(--transition-normal);
  /* Override old Notion-style body constraints */
  display: block;
  height: auto;
  overflow-x: hidden;
  overflow-y: auto;
}

/* ============================================================================
   Typography – Headings
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 1.875rem);
  font-weight: 700;
  margin-top: var(--spacing-2xl);
}

h3 {
  font-size: clamp(1.25rem, 3.5vw, 1.5rem);
  font-weight: 700;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

h5, h6 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================================
   Typography – Body & Lists
   ============================================================================ */

p {
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
  color: var(--text-primary);
}

a {
  color: var(--accent-coral);
  text-decoration: none;
  transition: color var(--transition-fast),
              opacity var(--transition-fast);
}

a:hover {
  opacity: 0.85;
}

ul, ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-2xl);
}

li {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

ul li::marker {
  color: var(--accent-coral);
}

ol li::marker {
  color: var(--accent-coral);
  font-weight: 600;
}

blockquote {
  margin: var(--spacing-2xl) 0;
  padding-left: var(--spacing-lg);
  border-left: 4px solid var(--accent-coral);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================================================
   Navigation – Medium Top Bar
   ============================================================================ */

.medium-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: color-mix(in srgb, var(--bg-secondary) 85%, transparent);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.medium-nav .nav-inner {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.medium-nav .nav-logo {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.medium-nav .nav-logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 4px;
}

.medium-nav .nav-logo:hover {
  color: var(--accent-coral);
}

.medium-nav .nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.medium-nav .nav-link {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--spacing-sm) 0;
}

.medium-nav .nav-link:hover {
  color: var(--accent-coral);
}

.theme-toggle-btn {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--accent-coral);
  border-color: var(--accent-coral);
}

/* Mobile Hamburger Menu */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-hamburger span::before,
.nav-hamburger span::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  transition: all var(--transition-fast);
}

.nav-hamburger span::before { top: -6px; }
.nav-hamburger span::after { top: 6px; }

.nav-hamburger[aria-expanded="true"] span {
  background-color: transparent;
}

.nav-hamburger[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 600px) {
  .nav-hamburger {
    display: flex;
  }

  .medium-nav .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    gap: 0;
  }

  .medium-nav .nav-links.open {
    display: flex;
  }

  .medium-nav .nav-link {
    padding: var(--spacing-md) 0;
    font-size: 1rem;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .theme-toggle-btn {
    min-height: 44px;
    min-width: 44px;
    margin-top: var(--spacing-sm);
  }
}

/* ============================================================================
   Blog Listing Page – Hero Section
   ============================================================================ */

.blog-hero {
  margin-top: 60px;
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
  text-align: center;
  background-color: var(--bg-primary);
}

.blog-hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.5rem);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.blog-hero .subtitle {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================================================
   Blog Listing Page – Feed
   ============================================================================ */

.blog-feed {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.article-card {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: var(--spacing-xl);
  align-items: flex-start;
  padding: var(--spacing-2xl) 0;
  transition: all var(--transition-normal);
}

.article-card:not(:last-child) {
  border-bottom: 1px solid var(--border-color);
}


.article-card .card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.article-card .card-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.article-card a .card-title:hover {
  color: var(--accent-coral);
}

.article-card .card-excerpt {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card .card-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
}

.article-card .card-author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--bg-tertiary);
}

.article-card .card-author-name {
  color: var(--text-secondary);
  font-weight: 500;
}

.article-card .card-image {
  width: 200px;
  height: 134px;
  object-fit: cover;
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  transition: transform var(--transition-normal);
}

.article-card a:hover .card-image {
  transform: scale(1.02);
}

.category-pill {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.375rem 0.75rem;
  background-color: var(--accent-light);
  color: var(--accent-coral);
  border-radius: 12px;
}

/* Mobile: Stack article cards vertically */
@media (max-width: 768px) {
  .article-card {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .article-card .card-image {
    width: 100%;
    height: auto;
    aspect-ratio: 1.5 / 1;
  }
}

/* ============================================================================
   Article Page – Header
   ============================================================================ */

.medium-article-header {
  max-width: 720px;
  margin: 80px auto 0;
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-2xl);
  text-align: center;
}

.medium-article-header h1 {
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 var(--spacing-xl) 0;
  line-height: 1.3;
  color: var(--text-primary);
}

.medium-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xl);
}

.medium-article-meta .meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.medium-article-meta .meta-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.medium-article-meta .meta-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--bg-tertiary);
}

.medium-article-meta .meta-author-name {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================================================
   Article Page – Body & Content
   ============================================================================ */

.medium-article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg) var(--spacing-3xl);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--text-primary);
}

.medium-article-body p {
  margin-bottom: var(--spacing-xl);
  line-height: 1.9;
}

.medium-article-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 1.875rem);
  font-weight: 700;
  margin: var(--spacing-3xl) 0 var(--spacing-xl);
  color: var(--text-primary);
}

.medium-article-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.5rem);
  font-weight: 700;
  margin: var(--spacing-2xl) 0 var(--spacing-lg);
  color: var(--text-primary);
}

.medium-article-body h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.medium-article-body ul,
.medium-article-body ol {
  margin: var(--spacing-xl) 0;
  padding-left: var(--spacing-2xl);
}

.medium-article-body li {
  margin-bottom: var(--spacing-lg);
  line-height: 1.9;
}

.medium-article-body blockquote {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-lg) 0 var(--spacing-lg) var(--spacing-lg);
  border-left: 4px solid var(--accent-coral);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.9;
}

.medium-article-body img {
  width: 100%;
  height: auto;
  margin: var(--spacing-2xl) 0;
  border-radius: 4px;
  display: block;
}

.medium-article-body img.inset {
  width: auto;
  max-width: 100%;
  margin: var(--spacing-lg) auto;
}

.medium-article-body figure {
  margin: var(--spacing-2xl) 0;
}

.medium-article-body figcaption {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-top: var(--spacing-md);
  text-align: center;
  font-style: italic;
}

.medium-article-body pre {
  background-color: var(--bg-tertiary);
  padding: var(--spacing-lg);
  border-radius: 4px;
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
  line-height: 1.6;
}

.medium-article-body code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.medium-article-body pre code {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.medium-article-body p code {
  background-color: var(--bg-tertiary);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  color: var(--accent-coral);
}

/* ============================================================================
   Content Blocks – CTA, Callout, Highlight
   ============================================================================ */

.call-to-action {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-xl);
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent-coral);
  border-radius: 4px;
}

.call-to-action p {
  margin-bottom: var(--spacing-md);
}

.call-to-action p:last-child {
  margin-bottom: 0;
}

.cta-button {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  background-color: var(--accent-coral);
  color: var(--bg-primary);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  margin-top: var(--spacing-md);
}

.cta-button:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.highlight-box {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  border-left: 4px solid var(--accent-coral);
}

.highlight-box p {
  margin-bottom: var(--spacing-md);
}

.highlight-box p:last-child {
  margin-bottom: 0;
}

.callout-block {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent-coral);
  border-radius: 4px;
}

.callout-block p {
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.callout-block p:last-child {
  margin-bottom: 0;
}

.tag-pill {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.375rem 0.75rem;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 12px;
  margin-right: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.tag-pill.category {
  background-color: var(--accent-light);
  color: var(--accent-coral);
}

/* ============================================================================
   Tables & Comparison
   ============================================================================ */

.medium-article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
}

.medium-article-body table th,
.medium-article-body table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.medium-article-body table th {
  background-color: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
}

.medium-article-body table tr:hover {
  background-color: var(--bg-tertiary);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background-color: var(--bg-tertiary);
  font-weight: 600;
}

.comparison-table tr:hover {
  background-color: var(--bg-tertiary);
}

/* ============================================================================
   Author Bio Section
   ============================================================================ */

.author-bio {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--border-color);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.author-bio-avatar {
  width: 64px;
  height: 64px;
  min-width: 64px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--bg-tertiary);
}

.author-bio-content {
  flex: 1;
}

.author-bio-name {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.author-bio-title {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-md);
}

.author-bio-bio {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================================
   Backward Compatibility – Existing Note Classes
   ============================================================================ */

.note-sidebar {
  display: none;
}

.mobile-overlay {
  display: none;
}

.note-topbar {
  display: none;
}

.note-icon {
  display: none;
}

.note-main {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  flex: none;
  height: auto;
  overflow: visible;
}

.note-content-scroll {
  overflow: visible;
  padding: 0;
  height: auto;
  flex: none;
}

.note-article {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.note-header {
  margin: 80px 0 var(--spacing-2xl) 0;
  text-align: center;
  padding-top: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.note-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 var(--spacing-xl) 0;
  line-height: 1.3;
  color: var(--text-primary);
}

.note-properties {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm) var(--spacing-xl);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 0;
  flex-direction: row;
}

.property-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.property-label {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-tertiary);
}

.property-value {
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.note-body {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--text-primary);
  margin: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.note-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 1.875rem);
  font-weight: 700;
  margin: var(--spacing-3xl) 0 var(--spacing-xl);
}

.note-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.5rem);
  font-weight: 700;
  margin: var(--spacing-2xl) 0 var(--spacing-lg);
}

.note-body p {
  margin-bottom: var(--spacing-xl);
  line-height: 1.9;
}

.note-body ul,
.note-body ol {
  margin: var(--spacing-xl) 0;
  padding-left: var(--spacing-2xl);
}

.note-body li {
  margin-bottom: var(--spacing-lg);
  line-height: 1.9;
}

.note-body blockquote {
  margin: var(--spacing-2xl) 0;
  padding-left: var(--spacing-lg);
  border-left: 4px solid var(--accent-coral);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.9;
}

.note-body img {
  width: 100%;
  height: auto;
  margin: var(--spacing-2xl) 0;
  border-radius: 4px;
  display: block;
}

.note-body pre {
  background-color: var(--bg-tertiary);
  padding: var(--spacing-lg);
  border-radius: 4px;
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
}

.note-body code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.note-body pre code {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.note-body p code {
  background-color: var(--bg-tertiary);
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  color: var(--accent-coral);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
  .medium-nav .nav-inner {
    padding: 0 var(--spacing-md);
  }

  .medium-nav .nav-links {
    gap: var(--spacing-lg);
  }

  .medium-nav .nav-link {
    font-size: 0.85rem;
  }

  .blog-hero {
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
  }

  .blog-hero h1 {
    margin-bottom: var(--spacing-md);
  }

  .blog-feed {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .article-card {
    padding: var(--spacing-xl) 0;
  }

  .medium-article-header {
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
    margin-top: 60px;
  }

  .medium-article-header h1 {
    margin-bottom: var(--spacing-lg);
  }

  .medium-article-body {
    padding: 0 var(--spacing-md) var(--spacing-2xl);
    font-size: 1rem;
  }

  .medium-article-body h2 {
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
  }

  .note-article {
    padding: 0 var(--spacing-md);
  }

  .note-body {
    font-size: 1rem;
  }

  .author-bio {
    flex-direction: column;
    text-align: center;
  }

  .author-bio-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .medium-nav .nav-links {
    gap: var(--spacing-md);
  }

  .medium-nav .nav-link {
    font-size: 0.75rem;
  }

  .medium-article-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .blog-feed {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .article-card {
    padding: var(--spacing-lg) 0;
  }

  .comparison-table,
  .medium-article-body table {
    font-size: 0.875rem;
  }

  .comparison-table th,
  .comparison-table td,
  .medium-article-body table th,
  .medium-article-body table td {
    padding: var(--spacing-sm);
  }
}

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
  .medium-nav {
    display: none;
  }

  .theme-toggle-btn {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  a {
    color: #0066cc;
  }

  .medium-article-body,
  .note-body {
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .medium-article-body img,
  .note-body img {
    max-width: 100%;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }

  p, li {
    orphans: 3;
    widows: 3;
  }
}

/* ============================================================================
   Accessibility
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* System dark preference handled via JS toggle + localStorage for consistency */

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent-coral);
  outline-offset: 2px;
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

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

.text-secondary {
  color: var(--text-secondary);
}

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.pt-0 { padding-top: 0; }
.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

.no-wrap {
  white-space: nowrap;
}

.break-word {
  overflow-wrap: break-word;
  word-break: break-word;
}

/* ============================================================================
   Article Content Utility Classes (extracted from inline styles)
   ============================================================================ */

.icon-inline {
  vertical-align: middle;
  margin-right: 8px;
}

.icon-sm {
  font-size: 16px;
}

.article-img {
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: 8px;
  margin: 20px 0;
}

.table-cell {
  padding: 15px;
  border: 1px solid var(--border-color);
}

.table-cell-sm {
  padding: 12px;
  border: 1px solid var(--border-color);
}

.table-header {
  padding: 15px;
  text-align: left;
  border: 1px solid var(--border-color);
}

.text-accent {
  color: var(--accent-coral);
}

.text-success {
  color: #4CAF50;
}

.text-warning-color {
  color: #ffc107;
  vertical-align: middle;
  margin-right: 8px;
}

.table-footer {
  padding: 12px;
  color: var(--text-tertiary);
  font-size: 0.8rem;
}

.content-box {
  background: var(--bg-tertiary);
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
}

.content-box-bordered {
  background: var(--bg-tertiary);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.warning-box {
  background: #fff3cd;
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
  border-left: 4px solid #ffc107;
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin: 30px 0;
}

.grid-3col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin: 30px 0;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.ml-sm {
  margin-left: 0.5rem;
}

.article-excerpt {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .grid-2col {
    grid-template-columns: 1fr;
  }
  .grid-3col {
    grid-template-columns: 1fr;
  }
}

body.dark-mode .warning-box {
  background: rgba(255, 243, 205, 0.1);
}

body.dark-mode .table-cell,
body.dark-mode .table-cell-sm,
body.dark-mode .table-header {
  border-color: var(--border-color);
}