:root {
      --primary: #0077b6;
      --primary-dark: #005f8e;
      --secondary: #00b4d8;
      --accent: #0096c7;
      --text-dark: #1a1a1a;
      --text-gray: #4a5568;
      --text-light: #718096;
      --bg-white: #ffffff;
      --bg-light: #f8fafc;
      --bg-gray: #f1f5f9;
      --border: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
      --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
      --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
      --shadow-xl: 0 20px 40px rgba(0,0,0,0.12);
      --heading-font: 'Merriweather', serif;
      --body-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--body-font);
      background: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* Header Section */
    .blog-hero {
      background: linear-gradient(135deg, #0077b6 0%, #00b4d8 100%);
      padding: 120px 0 80px;
      position: relative;
      overflow: hidden;
    }

    .blog-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
      opacity: 0.3;
    }

    .hero-container {
      max-width: 900px;
      margin: 0 auto;
      padding: 0 24px;
      position: relative;
      z-index: 1;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 24px;
      font-size: 14px;
      color: rgba(255,255,255,0.9);
    }

    .breadcrumb a {
      color: rgba(255,255,255,0.9);
      text-decoration: none;
      transition: var(--transition);
    }

    .breadcrumb a:hover {
      color: #fff;
    }

    .category-badge {
      display: inline-block;
      background: rgba(255,255,255,0.2);
      backdrop-filter: blur(10px);
      color: #fff;
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 20px;
    }

    .blog-title {
      font-family: var(--heading-font);
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 900;
      color: #fff;
      line-height: 1.2;
      margin-bottom: 20px;
      text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }

    .blog-subtitle {
      font-size: clamp(1.1rem, 2.5vw, 1.3rem);
      color: rgba(255,255,255,0.95);
      line-height: 1.6;
      margin-bottom: 30px;
      font-weight: 400;
    }

    .blog-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      color: rgba(255,255,255,0.9);
      font-size: 14px;
    }

    .meta-item {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .meta-item i {
      opacity: 0.8;
    }

    /* Featured Image */
    .featured-image-wrapper {
      max-width: 1200px;
      margin: -60px auto 0;
      padding: 0 24px;
      position: relative;
      z-index: 2;
    }

    .featured-image {
      width: 100%;
      height: 500px;
      object-fit: cover;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-xl);
      border: 6px solid #fff;
    }

    /* Content Section */
    .content-wrapper {
      max-width: 1200px;
      margin: 60px auto;
      padding: 0 24px;
      display: grid;
      grid-template-columns: 1fr 300px;
      gap: 60px;
      align-items: start;
    }

    .blog-content {
      background: var(--bg-white);
      padding: 48px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .blog-content h2 {
      font-family: var(--heading-font);
      font-size: 1.8rem;
      color: var(--text-dark);
      margin: 40px 0 20px;
      font-weight: 700;
      line-height: 1.3;
    }

    .blog-content h3 {
      font-family: var(--heading-font);
      font-size: 1.4rem;
      color: var(--text-dark);
      margin: 30px 0 16px;
      font-weight: 700;
    }

    .blog-content p {
      margin-bottom: 24px;
      color: var(--text-gray);
      font-size: 1.05rem;
      line-height: 1.8;
    }

    .blog-content ul,
    .blog-content ol {
      margin: 24px 0 24px 32px;
      color: var(--text-gray);
    }

    .blog-content li {
      margin-bottom: 12px;
      line-height: 1.7;
      padding-left: 8px;
    }

    .blog-content ul li {
      list-style: none;
      position: relative;
    }

    .blog-content ul li::before {
      content: '•';
      color: var(--primary);
      font-weight: bold;
      font-size: 1.2em;
      position: absolute;
      left: -20px;
    }

    .blog-content a {
      color: var(--primary);
      text-decoration: none;
      border-bottom: 1px solid var(--secondary);
      transition: var(--transition);
    }

    .blog-content a:hover {
      color: var(--primary-dark);
      border-bottom-color: var(--primary-dark);
    }

    .blog-content blockquote {
      background: linear-gradient(135deg, #e0f2fe 0%, #f0f9ff 100%);
      border-left: 4px solid var(--primary);
      padding: 24px 28px;
      margin: 32px 0;
      border-radius: var(--radius-sm);
      font-style: italic;
      color: var(--text-gray);
      position: relative;
    }

    .blog-content blockquote::before {
      content: '"';
      font-size: 3rem;
      color: var(--secondary);
      opacity: 0.3;
      position: absolute;
      top: 10px;
      left: 12px;
      font-family: Georgia, serif;
    }

    .blog-content img {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      margin: 32px 0;
      box-shadow: var(--shadow-md);
    }

    /* Sidebar */
    .sidebar {
      position: sticky;
      top: 24px;
    }

    .sidebar-card {
      background: var(--bg-white);
      padding: 28px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      margin-bottom: 24px;
    }

    .sidebar-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .sidebar-card h3 i {
      color: var(--primary);
    }

    .author-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .author-avatar {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 24px;
      font-weight: 700;
      flex-shrink: 0;
    }

    .author-details h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 4px;
    }

    .author-details p {
      font-size: 0.85rem;
      color: var(--text-light);
      margin: 0;
    }

    .share-buttons-sidebar {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .share-btn {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition);
      border: 1px solid var(--border);
    }

    .share-btn i {
      font-size: 1.1rem;
    }

    .share-btn.facebook {
      color: #1877f2;
    }

    .share-btn.facebook:hover {
      background: #1877f2;
      color: #fff;
      border-color: #1877f2;
    }

    .share-btn.twitter {
      color: #000;
    }

    .share-btn.twitter:hover {
      background: #000;
      color: #fff;
      border-color: #000;
    }

    .share-btn.linkedin {
      color: #0a66c2;
    }

    .share-btn.linkedin:hover {
      background: #0a66c2;
      color: #fff;
      border-color: #0a66c2;
    }

    .share-btn.copy {
      color: var(--primary);
    }

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

    /* Tags Section */
    .tags-section {
      margin-top: 48px;
      padding-top: 32px;
      border-top: 2px solid var(--border);
    }

    .tags-section h4 {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-light);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }

    .tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--bg-gray);
      color: var(--text-gray);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 500;
      transition: var(--transition);
      text-decoration: none;
    }

    .tag:hover {
      background: var(--primary);
      color: #fff;
      transform: translateY(-2px);
    }

    /* CTA Section */
    .cta-section {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      padding: 48px;
      border-radius: var(--radius-lg);
      text-align: center;
      margin-top: 48px;
    }

    .cta-section h3 {
      font-family: var(--heading-font);
      font-size: 1.8rem;
      margin-bottom: 16px;
    }

    .cta-section p {
      font-size: 1.05rem;
      margin-bottom: 28px;
      opacity: 0.95;
    }

    .cta-btn {
      display: inline-block;
      background: #fff;
      color: var(--primary);
      padding: 14px 32px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }

    .cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    }

    /* Footer */
    footer {
      background: var(--text-dark);
      color: rgba(255,255,255,0.8);
      text-align: center;
      padding: 32px 24px;
      margin-top: 80px;
      font-size: 0.9rem;
    }

    footer a {
      color: var(--secondary);
      text-decoration: none;
      transition: var(--transition);
    }

    footer a:hover {
      color: #fff;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .content-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .sidebar {
        position: static;
      }

      .featured-image {
        height: 400px;
      }

      .blog-content {
        padding: 32px 24px;
      }
    }

    @media (max-width: 768px) {
      .blog-hero {
        padding: 80px 0 60px;
      }

      .featured-image {
        height: 300px;
        margin-top: -40px;
      }

      .blog-title {
        font-size: 1.8rem;
      }

      .blog-subtitle {
        font-size: 1rem;
      }

      .blog-meta {
        gap: 16px;
      }

      .content-wrapper {
        margin: 40px auto;
      }

      .blog-content {
        padding: 24px 20px;
      }

      .blog-content h2 {
        font-size: 1.5rem;
      }

      .cta-section {
        padding: 32px 24px;
      }
    }

    /* Smooth Scroll Progress Bar */
    .progress-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 0%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      z-index: 9999;
      transition: width 0.1s ease;
    }

    /* Loading Animation */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .blog-content > * {
      animation: fadeIn 0.6s ease-out;
    }