/* ============================================================
       CSS VARIABLES & BASE THEME — BRIGHT & VIBRANT
       ============================================================ */
    
    :root {
      /* Bright neon turquoise/teal colors */
      --accent: #00E5FF;
      --accent-light: #E0F7FA;
      --accent-bright: #00D4FF;
      
      --white: #ffffff;
      --cream: #FFFBF5;
      --light-bg: #FFF8F3;
      --bright-teal: #00D9D9;
      --bright-purple: #9D4EDD;
      --bright-orange: #FF9500;
      --bright-green: #00D084;

      /* Semantic colors — bright palette */
      --text-primary: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-muted: #888888;
      --border-color: #B3E5FC;
      --border-strong: #80DEEA;
      --surface-0: #FFFBF5;
      --surface-1: #FFF8F3;
      --surface-2: #ffffff;

      /* Accent colors for content types — vibrant */
      --color-blog: #00E5FF;
      --color-insight: #FF006E;
      --color-research: #00D084;
      --color-video: #FF9500;
      --color-comparison: #00E5FF;

      /* Spacing */
      --sp-xs: 4px;
      --sp-sm: 8px;
      --sp-md: 12px;
      --sp-lg: 16px;
      --sp-xl: 24px;
      --sp-2xl: 32px;

      /* Typography — Serif + Handwritten */
      --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      --font-serif: 'Playfair Display', Georgia, serif;
      --font-handwritten: 'Caveat', cursive;
      --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

      /* Radius */
      --radius: 8px;
    }

    /* Dark mode support — neon turquoise stays vibrant */
    @media (prefers-color-scheme: dark) {
      :root {
        --text-primary: #f5f5f5;
        --text-secondary: #d0d0d0;
        --text-muted: #888888;
        --border-color: #00A9B5;
        --border-strong: #00CED1;
        --surface-0: #0D0D0D;
        --surface-1: #1A1A1A;
        --surface-2: #242424;
      }
    }

    /* Explicit light mode — minimal with neon teal */
    html[data-theme="light"] {
      --text-primary: #1A1A1A;
      --text-secondary: #555555;
      --text-muted: #999999;
      --border-color: #E8E8E8;
      --border-strong: #D0D0D0;
      --surface-0: #FFFFFF;
      --surface-1: #FAFAFA;
      --surface-2: #FFFFFF;
      --accent-light: #F0FEFF;
    }

    html[data-theme="light"] .main-header {
      border-bottom: 1px solid #F0F0F0;
    }

    html[data-theme="light"] header {
      border-bottom: 1px solid #F0F0F0;
    }

    html[data-theme="light"] .divider {
      background: #F0F0F0;
    }

    html[data-theme="light"] .controls {
      border-bottom: 1px solid #F0F0F0;
    }

    html[data-theme="light"] .footer {
      border-top-color: #F0F0F0;
    }

    /* Explicit dark mode */
    html[data-theme="dark"] {
      --text-primary: #f5f5f5;
      --text-secondary: #d0d0d0;
      --text-muted: #888888;
      --border-color: #00A9B5;
      --border-strong: #00CED1;
      --surface-0: #0D0D0D;
      --surface-1: #1A1A1A;
      --surface-2: #242424;
    }

    /* ============================================================
       GLOBAL STYLES
       ============================================================ */

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.6;
      color: var(--text-primary);
      background: var(--surface-0);
    }

    /* ============================================================
       LAYOUT STRUCTURE
       ============================================================ */

    .container,
    .header-container,
    .main-container,
    .footer-content {
      max-width: 900px;
      margin: 0 auto;
      padding: var(--sp-2xl);
    }

    .footer {
      margin-top: var(--sp-2xl);
      border-top: 2px solid var(--border-color);
    }

    header {
      margin-bottom: var(--sp-2xl);
      padding-bottom: var(--sp-2xl);
      border-bottom: 2px solid var(--border-color);
    }

    .main-header {
      border-bottom: none;
      padding-bottom: var(--sp-2xl);
      margin-bottom: var(--sp-2xl);
    }

    .hero-title {
      display: inline-block;
      position: relative;
      margin-bottom: var(--sp-lg);
      overflow: visible;
    }

    .hero-the {
      font-family: var(--font-serif);
      font-size: 64px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -2px;
      line-height: 1;
      display: block;
    }

    .hero-monologues {
      font-family: var(--font-handwritten);
      font-size: 72px;
      font-weight: 600;
      background: linear-gradient(135deg, #00E5FF 0%, #00B4D8 50%, #00D9D9 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      display: block;
      line-height: 1;
      margin-top: -28px;
      margin-left: 0;
      position: relative;
      z-index: 1;
      padding-bottom: 8px;
      padding-right: 0.3em;
    }

    header .subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 700px;
      line-height: 1.7;
    }

    .theme-toggle {
      position: absolute;
      top: 0;
      right: 0;
      background: transparent;
      border: none;
      font-size: 20px;
      cursor: pointer;
      padding: var(--sp-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      transition: all 0.3s ease;
      color: var(--accent);
      width: 48px;
      height: 48px;
      font-weight: 300;
      letter-spacing: 2px;
    }

    .theme-toggle:hover {
      background: var(--accent);
      color: #1A1A1A;
      opacity: 0.85;
    }

    header {
      position: relative;
    }

    /* ============================================================
       TIMELINE LAYOUT
       ============================================================ */

    .content-wrapper {
      display: grid;
      grid-template-columns: 220px 1fr;
      gap: var(--sp-2xl);
    }

    @media (max-width: 1024px) {
      .content-wrapper {
        grid-template-columns: 180px 1fr;
        gap: var(--sp-xl);
      }
    }

    @media (max-width: 768px) {
      .content-wrapper {
        grid-template-columns: 1fr;
      }
    }

    .timeline {
      position: sticky;
      top: var(--sp-2xl);
      height: fit-content;
    }

    .timeline-item {
      display: flex;
      gap: var(--sp-md);
      margin-bottom: var(--sp-2xl);
      align-items: flex-start;
    }

    .timeline-dot {
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--accent);
      margin-top: 2px;
      flex-shrink: 0;
      box-shadow: 0 0 0 4px var(--accent-light);
      border: 2px solid var(--white);
    }

    .timeline-content {
      flex: 1;
    }

    .timeline-date {
      font-family: var(--font-handwritten);
      font-size: 16px;
      color: var(--accent);
      font-weight: 500;
      margin-bottom: var(--sp-xs);
      letter-spacing: 0.3px;
    }

    .timeline-title {
      font-family: var(--font-serif);
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.3;
    }

    .timeline-type {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.4px;
      margin-top: var(--sp-xs);
    }

    /* Timeline line */
    .timeline::before {
      content: '';
      position: absolute;
      left: 7px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-color);
      z-index: -1;
    }

    @media (max-width: 768px) {
      .timeline {
        position: static;
        margin-bottom: var(--sp-2xl);
        padding-bottom: var(--sp-2xl);
        border-bottom: 2px solid var(--border-color);
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: var(--sp-lg);
      }

      .timeline-item {
        margin-bottom: 0;
      }

      .timeline::before {
        display: none;
      }

      .timeline-dot {
        display: none;
      }

      .timeline-date {
        font-size: 14px;
      }

      .timeline-title {
        font-size: 13px;
      }
    }

    /* ============================================================
       FILTER TAGS / CONTROLS
       ============================================================ */

    .controls {
      margin-bottom: var(--sp-2xl);
      display: flex;
      flex-direction: column;
      gap: var(--sp-md);
    }

    /* Icon-only toggle, right-aligned. Click/tap or press Enter/Space
       to expand or collapse the filter buttons below. */
    .controls-header {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      cursor: pointer;
      user-select: none;
    }

    .filter-toggle-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid var(--border-color);
      color: var(--accent);
      transition: all 0.2s ease, transform 0.25s ease;
      flex-shrink: 0;
    }

    .controls-header:hover .filter-toggle-icon {
      background: var(--accent);
      color: var(--white);
      border-color: var(--accent);
    }

    .controls-header[aria-expanded="true"] .filter-toggle-icon {
      transform: rotate(180deg);
    }

    /* Collapsed by default; JS toggles the "open" class on click. */
    .filter-group {
      display: flex;
      gap: var(--sp-sm);
      flex-wrap: wrap;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
      transition: max-height 0.25s ease, opacity 0.2s ease;
    }

    .filter-group.open {
      max-height: 200px;
      opacity: 1;
    }

    .filter-tag {
      padding: 6px 12px;
      background: var(--surface-2);
      border: 1px solid var(--border-color);
      border-radius: 4px;
      font-size: 13px;
      cursor: pointer;
      transition: all 0.2s ease;
      color: var(--text-secondary);
    }

    .filter-tag:hover {
      border-color: var(--border-strong);
      background: var(--surface-1);
    }

    .filter-tag.active {
      background: var(--accent);
      color: var(--white);
      border-color: var(--accent);
    }

    /* ============================================================
       FEED LAYOUT
       ============================================================ */

    .feed {
      display: grid;
      gap: var(--sp-2xl);
    }

    /* ============================================================
       QUOTE CARDS
       ============================================================ */

    .quote-card {
      border-left: 6px solid var(--accent);
      padding: var(--sp-2xl);
      border-radius: 0;
      max-width: 600px;
      text-align: center;
      background: transparent;
      box-shadow: none;
    }

    .quote-card.insight {
      border-left-color: #FF006E;
    }

    .quote-card .quote-text {
      font-family: var(--font-handwritten);
      font-size: 28px;
      font-weight: 500;
      line-height: 1.8;
      margin-bottom: var(--sp-lg);
      color: #FF006E;
      letter-spacing: 0.3px;
    }

    .quote-card .quote-author {
      font-size: 14px;
      color: var(--text-secondary);
      font-weight: 600;
      font-family: var(--font-serif);
    }

    /* ============================================================
       ARTICLE CARDS
       ============================================================ */

    .article-card {
      background: var(--surface-2);
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      transition: all 0.3s ease;
      display: grid;
      grid-template-columns: 1fr;
    }

    .article-card:hover {
      border-color: var(--accent);
      box-shadow: 0 6px 20px rgba(0, 229, 255, 0.2);
      transform: translateY(-2px);
    }

    .article-card a {
      text-decoration: none;
      color: inherit;
    }

    .article-card header {
      padding: var(--sp-lg);
      border-bottom: 1px solid var(--border-color);
      border: none;
    }

    .article-card .badge {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.6px;
      padding: 6px 10px;
      border-radius: 4px;
      margin-bottom: var(--sp-md);
      color: var(--white);
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    }

    .article-card .badge.blog {
      background: var(--color-blog);
      box-shadow: 0 4px 12px rgba(0, 229, 255, 0.4);
    }

    .article-card .badge.insight {
      background: var(--color-insight);
      box-shadow: 0 4px 12px rgba(255, 0, 110, 0.3);
    }

    .article-card .badge.research {
      background: var(--color-research);
      box-shadow: 0 4px 12px rgba(0, 208, 132, 0.3);
    }

    .article-card .badge.video {
      background: var(--color-video);
      box-shadow: 0 4px 12px rgba(255, 149, 0, 0.3);
    }

    .article-card h2 {
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 600;
      margin-bottom: var(--sp-sm);
      line-height: 1.3;
      color: var(--text-primary);
    }

    .article-card .meta {
      font-size: 13px;
      color: var(--text-secondary);
    }

    .article-card .excerpt {
      padding: var(--sp-lg);
      min-height: 80px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .article-card .excerpt p {
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-secondary);
    }

    .article-card footer {
      padding: var(--sp-md) var(--sp-lg);
      border-top: 1px solid var(--border-color);
      display: flex;
      gap: var(--sp-md);
      font-size: 12px;
      color: var(--text-secondary);
      flex-wrap: wrap;
    }

    .article-card footer .tag {
      background: var(--surface-1);
      padding: 2px 6px;
      border-radius: 3px;
      font-size: 11px;
    }

    /* ============================================================
       COMPARISON VIEW
       ============================================================ */

    .comparison {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: var(--sp-lg);
      margin-bottom: var(--sp-2xl);
    }

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

    .comparison-item {
      background: var(--surface-2);
      border: 1px solid var(--border-color);
      border-left: 4px solid var(--border-color);
      padding: var(--sp-lg);
      border-radius: var(--radius);
    }

    .comparison-item.your-take {
      border-left-color: var(--accent);
    }

    .comparison-item.news {
      border-left-color: var(--gray-400);
    }

    .comparison-item.research {
      border-left-color: var(--color-research);
    }

    .comparison-label {
      font-size: 11px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--text-muted);
      margin-bottom: var(--sp-md);
    }

    .comparison-item h3 {
      font-family: var(--font-serif);
      font-size: 19px;
      font-weight: 600;
      margin-bottom: var(--sp-md);
      line-height: 1.3;
      color: var(--text-primary);
    }

    .comparison-item p {
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-secondary);
      margin-bottom: var(--sp-md);
    }

    .comparison-item .source {
      padding-top: var(--sp-md);
      border-top: 1px solid var(--border-color);
      font-size: 12px;
      color: var(--text-muted);
    }

    /* ============================================================
       RESEARCH MATERIAL
       ============================================================ */

    .research-item {
      background: var(--surface-2);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: var(--sp-lg);
    }

    .research-item .badge {
      background: var(--color-research);
    }

    .research-item h3 {
      font-family: var(--font-serif);
      font-size: 19px;
      font-weight: 600;
      margin: var(--sp-md) 0;
      line-height: 1.3;
      color: var(--text-primary);
    }

    .research-item .publication {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: var(--sp-md);
    }

    .research-item .abstract {
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-secondary);
      margin-bottom: var(--sp-md);
    }

    .research-item .tags {
      display: flex;
      gap: var(--sp-sm);
      flex-wrap: wrap;
      margin-bottom: var(--sp-md);
    }

    .research-item .tags span {
      background: var(--surface-1);
      padding: 4px 8px;
      border-radius: 3px;
      font-size: 11px;
      color: var(--text-secondary);
    }

    .research-item .access {
      font-size: 12px;
      color: var(--text-muted);
      padding-top: var(--sp-md);
      border-top: 1px solid var(--border-color);
    }

    /* ============================================================
       VIDEO CONTENT
       ============================================================ */

    .video-item {
      background: var(--surface-2);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: var(--sp-lg);
    }

    .video-item .badge {
      background: var(--color-video);
    }

    .video-item h3 {
      font-family: var(--font-serif);
      font-size: 19px;
      font-weight: 600;
      margin: var(--sp-md) 0;
      line-height: 1.3;
      color: var(--text-primary);
    }

    .video-item .meta {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: var(--sp-md);
    }

    .video-embed {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #000;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      margin-bottom: var(--sp-lg);
      font-size: 48px;
    }

    .video-item p {
      font-size: 14px;
      line-height: 1.6;
      color: var(--text-secondary);
      margin-bottom: var(--sp-md);
    }

    .video-notes {
      background: var(--surface-1);
      border-left: 3px solid var(--accent);
      padding: var(--sp-md);
      border-radius: 0;
      margin-bottom: var(--sp-md);
    }

    .video-notes .notes-label {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: var(--sp-sm);
    }

    .video-notes .notes-text {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      font-style: italic;
    }

    .video-item .source {
      font-size: 12px;
      color: var(--text-muted);
      padding-top: var(--sp-md);
      border-top: 1px solid var(--border-color);
    }

    /* ============================================================
       RESPONSIVE DESIGN
       ============================================================ */

    @media (max-width: 768px) {
      .container,
    .header-container,
    .main-container,
    .footer-content {
        padding: var(--sp-lg);
      }

      .theme-toggle {
        padding: var(--sp-md);
        font-size: 18px;
        width: 44px;
        height: 44px;
      }

      .hero-the {
        font-size: 58px;
      }

      .hero-monologues {
        font-size: 68px;
        margin-left: 0;
          padding-bottom: 8px;
        padding-right: 0.3em;
      }

      .controls {
        gap: var(--sp-md);
      }

      .footer {
        margin-top: 50vh;
      }

      .quote-card {
        padding: var(--sp-lg);
      }

      .quote-card .quote-text {
        font-size: 22px;
      }

    }

    /* Note: .hero-title styles for tablet removed - uses desktop inline-block display */

    @media (max-width: 480px) {
      .container,
    .header-container,
    .main-container,
    .footer-content {
        padding: var(--sp-md);
      }

      .theme-toggle {
        padding: var(--sp-md);
        font-size: 18px;
        width: 44px;
        height: 44px;
      }

      .hero-the {
        font-size: 48px;
      }

      .hero-monologues {
        font-size: 58px;
        margin-top: -18px;
        margin-left: 0;
          padding-bottom: 6px;
        padding-right: 0.3em;
      }

      header .subtitle {
        font-size: 14px;
      }

      .comparison {
        gap: var(--sp-md);
      }
    }

    /* ============================================================
       UTILITY CLASSES
       ============================================================ */

    .divider {
      height: 1px;
      background: var(--border-color);
      margin: var(--sp-2xl) 0;
    }

    .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;
    }

    /* Footer styling with handwritten accents */
    footer {
      font-size: 15px;
    }

    footer p:first-child {
      font-family: var(--font-handwritten);
      font-size: 22px;
      color: var(--accent);
      font-weight: 500;
    }

/* ============================================================
   SINGLE POST (full article page)
   ============================================================ */

.single-post {
  max-width: 700px;
  margin: 0 auto;
}

.single-post .badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 6px 10px;
  border-radius: 4px;
  margin-bottom: var(--sp-md);
  color: var(--white);
}

.single-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: var(--sp-md);
}

.single-meta {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--sp-2xl);
  padding-bottom: var(--sp-lg);
  border-bottom: 1px solid var(--border-color);
}

.single-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.single-content p {
  margin-bottom: var(--sp-lg);
}

.single-content h2,
.single-content h3 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  margin: var(--sp-2xl) 0 var(--sp-md);
}

.single-content a {
  color: var(--accent);
}

.single-content blockquote {
  border-left: 4px solid var(--accent);
  padding-left: var(--sp-lg);
  color: var(--text-secondary);
  font-style: italic;
  margin: var(--sp-lg) 0;
}

.single-content code {
  background: var(--surface-1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 14px;
}

.single-content pre {
  background: var(--surface-1);
  padding: var(--sp-lg);
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: var(--sp-lg);
}

.single-tags {
  display: flex;
  gap: var(--sp-md);
  flex-wrap: wrap;
  margin-top: var(--sp-2xl);
  padding-top: var(--sp-lg);
  border-top: 1px solid var(--border-color);
}

.single-tags .tag {
  background: var(--surface-1);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

.single-back {
  display: inline-block;
  margin-top: var(--sp-2xl);
  color: var(--accent);
  font-size: 14px;
  text-decoration: none;
}

.single-back:hover {
  text-decoration: underline;
}