:root {      --primary: #1e40af;      --primary-light: #3b82f6;      --text: #1e293b;      --text-muted: #64748b;      --bg: #f1f5f9;      --card: #ffffff;      --border: #e2e8f0;      --radius: 16px;      --shadow: 0 10px 25px rgba(0,0,0,0.08);      --sidebar-w: 280px;    }    /* ... Mevcut CSS kodları ... */    .category-title {      font-size: 2.6rem;      font-weight: 800;      line-height: 1.2;      margin-bottom: 1.2rem;      color: var(--primary);    }    .blog-grid {      display: grid;      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));      gap: 1.5rem;      margin-bottom: 2rem;    }    .blog-card {      background: var(--card);      border-radius: var(--radius);      box-shadow: 0 4px 12px rgba(0,0,0,0.05);      text-decoration: none;      color: var(--text);      overflow: hidden;      transition: transform 0.3s ease;    }    .blog-card:hover {      transform: translateY(-5px);    }    .blog-card img {      width: 100%;      height: 200px;      object-fit: cover;      border-radius: var(--radius) var(--radius) 0 0;    }    .blog-info {      padding: 1.5rem;    }    .blog-info h4 {      font-size: 1.3rem;      font-weight: 600;      margin-bottom: 0.8rem;    }    .blog-info p {      font-size: 1rem;      color: var(--text-muted);      margin-bottom: 1rem;      display: -webkit-box;      -webkit-line-clamp: 3;      -webkit-box-orient: vertical;      overflow: hidden;    }    .blog-meta {      display: flex;      gap: 1rem;      font-size: 0.95rem;      color: var(--text-muted);    }  </style>   <style>    :root {      --primary: #1e40af;      --primary-light: #3b82f6;      --text: #1e293b;      --text-muted: #64748b;      --bg: #f1f5f9;      --card: #ffffff;      --border: #e2e8f0;      --radius: 16px;      --shadow: 0 10px 25px rgba(0,0,0,0.08);      --sidebar-w: 280px;    }    * { margin: 0; padding: 0; box-sizing: border-box; }    body {      font-family: 'Inter', sans-serif;      background: var(--bg);      color: var(--text);      line-height: 1.7;      overflow-x: hidden;      transition: all 0.3s ease;    }    body.reading-mode {      background: #fff;    }    body.reading-mode .header,    body.reading-mode .sidebar,    body.reading-mode #mobile-sidebar,    body.reading-mode #sidebar-overlay,    body.reading-mode .footer {      display: none;    }    body.reading-mode .post-content {      font-size: 1.2rem;      line-height: 2;      max-width: 900px;      margin: 0 auto;      padding: 1.5rem;    }    body.reading-mode .post-title {      font-size: 2.2rem;    }    /* Reading Progress Bar */    .reading-progress {      position: fixed;      top: 0;      left: 0;      width: 0;      height: 4px;      background: var(--primary-light);      z-index: 2000;      transition: width 0.3s ease;    }    /* Header */    .header {      background: var(--card);      padding: 1rem 2.5rem;      display: flex;      justify-content: space-between;      align-items: center;      box-shadow: 0 2px 8px rgba(0,0,0,0.06);      position: sticky;      top: 0;      z-index: 1000;      transition: all 0.3s ease;    }    .logo {      font-size: 1.5rem;      font-weight: 800;      color: var(--primary);      text-decoration: none;      display: flex;      gap: 0.6rem;      align-items: center;    }    .logo img {      height: 40px;      width: auto;    }    nav.desktop-nav ul {      display: flex;      list-style: none;      gap: 2rem;    }    nav.desktop-nav a {      color: var(--text);      text-decoration: none;      font-weight: 600;      font-size: 1.05rem;      display: flex;      align-items: center;      gap: 0.5rem;      transition: color 0.3s ease;    }    nav.desktop-nav a:hover,    nav.desktop-nav a.active {      color: var(--primary-light);    }    .menu-toggle {      display: none;      background: none;      border: none;      font-size: 1.6rem;      cursor: pointer;      color: var(--text);      transition: transform 0.3s ease;    }    .menu-toggle.active {      transform: rotate(90deg);    }    /* Breadcrumb */    .breadcrumb {      padding: 0.8rem 2.5rem;      background: var(--card);      font-size: 0.95rem;      color: var(--text-muted);      border-bottom: 1px solid var(--border);    }    .breadcrumb a {      color: var(--primary);      text-decoration: none;    }    .breadcrumb span:not(a) {      color: var(--text-muted);    }    /* Layout */    .container {      display: flex;      max-width: 1400px;      margin: 2rem auto;      padding: 0 2rem;      gap: 2.5rem;    }    /* Main Content */    main {      flex: 1;      max-width: 820px;    }    .post-card {      background: var(--card);      border-radius: var(--radius);      box-shadow: var(--shadow);      padding: 3rem;    }    .post-title {      font-size: 2.6rem;      font-weight: 800;      line-height: 1.2;      margin-bottom: 1.2rem;      color: var(--primary);    }    .post-meta {      display: flex;      flex-wrap: wrap;      gap: 1.4rem;      margin-bottom: 2.5rem;      color: var(--text-muted);      font-size: 1rem;    }    .featured-image {      width: 100%;      height: auto;      max-height: 500px;      object-fit: cover;      border-radius: var(--radius);      margin: 2.5rem 0;      display: block;    }    .post-content {      font-size: 1.08rem;      color: var(--text);    }    .post-content p {      margin-bottom: 1.6rem;    }    .post-content h2 {      font-size: 1.7rem;      margin: 2.2rem 0 1.2rem;      color: var(--primary);      scroll-margin-top: 80px;    }    .post-content ul {      margin-left: 0;      margin-bottom: 1.6rem;      list-style: none;      padding-left: 1.5rem;    }    .post-content li {      position: relative;      padding-left: 1.8rem;      margin-bottom: 0.8rem;      transition: all 0.3s ease;    }    .post-content li::before {      content: '➔';      position: absolute;      left: 0;      color: var(--primary);      font-size: 1.1rem;      line-height: 1.7;    }    .post-content li:hover {      color: var(--primary-light);      transform: translateX(5px);    }    .reading-mode-button {      background: var(--primary);      color: white;      border: none;      padding: 0.8rem 1.5rem;      border-radius: var(--radius);      cursor: pointer;      font-size: 1rem;      font-weight: 600;      margin-bottom: 1.5rem;      transition: background 0.3s ease;    }    .reading-mode-button:hover {      background: var(--primary-light);    }    /* Table of Contents */    .toc {      background: var(--card);      border-radius: var(--radius);      padding: 1.5rem;      margin-bottom: 2rem;      box-shadow: 0 4px 12px rgba(0,0,0,0.05);      position: sticky;      top: 80px;      z-index: 900;    }    .toc h3 {      font-size: 1.2rem;      color: var(--primary);      margin-bottom: 1rem;      display: flex;      align-items: center;      gap: 0.6rem;    }    .toc ul {      list-style: none;      padding: 0;    }    .toc li {      margin-bottom: 0.8rem;    }    .toc a {      color: var(--text);      text-decoration: none;      font-size: 1rem;      transition: color 0.3s ease;    }    .toc a:hover {      color: var(--primary-light);    }    /* Social Share */    .social-share {      display: flex;      gap: 1rem;      margin-top: 2.5rem;      padding-top: 2rem;      border-top: 1px solid var(--border);      justify-content: flex-start;      flex-wrap: wrap;    }    .social-share a {      display: flex;      align-items: center;      justify-content: center;      width: 44px;      height: 44px;      border-radius: 50%;      background: var(--bg);      color: var(--text);      text-decoration: none;      transition: all 0.25s ease;    }    .social-share a:hover {      transform: translateY(-2px);      box-shadow: 0 4px 8px rgba(0,0,0,0.1);    }    .social-share a.whatsapp {      background: #25D366;      color: white;    }    .social-share a.facebook {      background: #1877F2;      color: white;    }    .social-share a.twitter {      background: #1DA1F2;      color: white;    }    .social-share a.linkedin {      background: #0A66C2;      color: white;    }    /* Related Posts */    .related-posts {      margin-top: 3rem;      padding-top: 2rem;      border-top: 1px solid var(--border);    }    .related-posts h3 {      font-size: 1.4rem;      color: var(--primary);      margin-bottom: 1.5rem;      display: flex;      align-items: center;      gap: 0.6rem;    }    .related-posts-grid {      display: grid;      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));      gap: 1.5rem;    }    .related-post-card {      background: var(--card);      border-radius: var(--radius);      box-shadow: 0 4px 12px rgba(0,0,0,0.05);      text-decoration: none;      color: var(--text);      overflow: hidden;      transition: transform 0.3s ease;    }    .related-post-card:hover {      transform: translateY(-5px);    }    .related-post-card img {      width: 100%;      height: 150px;      object-fit: cover;      border-radius: var(--radius) var(--radius) 0 0;    }    .related-info {      padding: 1rem;    }    .related-info h4 {      font-size: 1.1rem;      font-weight: 600;      margin-bottom: 0.5rem;    }    /* Sidebar */    .sidebar {      width: var(--sidebar-w);      flex-shrink: 0;    }    .card {      background: var(--card);      border-radius: var(--radius);      padding: 1.5rem;      margin-bottom: 1.6rem;      box-shadow: 0 4px 12px rgba(0,0,0,0.05);    }    .card h3 {      font-size: 1.2rem;      margin-bottom: 1.1rem;      color: var(--primary);      display: flex;      align-items: center;      gap: 0.6rem;    }    .card ul {      list-style: none;      padding: 0;    }    .card li {      margin-bottom: 1.1rem;    }    .card a {      display: flex;      gap: 14px;      text-decoration: none;      color: var(--text);    }    .card img {      width: 60px;      height: 60px;      object-fit: cover;      border-radius: 10px;      flex-shrink: 0;    }    .card .info {      flex: 1;    }    .card .info div:first-child {      font-weight: 600;      font-size: 1rem;    }    .card .info small {      color: var(--text-muted);      font-size: 0.9rem;    }    /* Mobile Sidebar */    #sidebar-overlay {      display: none;      position: fixed;      top: 0;      left: 0;      width: 100vw;      height: 100vh;      background: rgba(0,0,0,0.5);      z-index: 999;      transition: opacity 0.3s ease;    }    #mobile-sidebar {      position: fixed;      top: 0;      left: -100%;      width: var(--sidebar-w);      height: 100vh;      background: var(--card);      box-shadow: 2px 0 12px rgba(0,0,0,0.12);      overflow-y: auto;      z-index: 1000;      transition: left 0.3s ease;      padding: 1.8rem;    }    #mobile-sidebar.active {      left: 0;    }    #sidebar-overlay.active {      display: block;      opacity: 1;    }    .close-sidebar {      background: none;      border: none;      font-size: 1.6rem;      color: var(--text);      cursor: pointer;      position: absolute;      top: 1.5rem;      right: 1.5rem;    }    /* Footer */    .footer {      background: var(--primary);      color: white;      padding: 3rem 2rem;      margin-top: 4rem;      display: grid;      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));      gap: 2rem;      text-align: left;    }    .footer h4 {      font-size: 1.2rem;      margin-bottom: 1rem;      font-weight: 600;    }    .footer ul {      list-style: none;    }    .footer ul li {      margin-bottom: 0.8rem;    }    .footer a {      color: rgba(255,255,255,0.9);      text-decoration: none;      transition: color 0.3s ease;    }    .footer a:hover {      color: var(--primary-light);    }    .footer .social-links a {      display: inline-flex;      align-items: center;      justify-content: center;      width: 40px;      height: 40px;      border-radius: 50%;      background: rgba(255,255,255,0.1);      margin-right: 0.5rem;    }    .footer .social-links a:hover {      background: var(--primary-light);    }    .footer .copyright {      text-align: center;      grid-column: 1 / -1;      margin-top: 2rem;      padding-top: 1rem;      border-top: 1px solid rgba(255,255,255,0.2);      font-size: 0.95rem;    }    /* Responsive */    @media (max-width: 1024px) {      .sidebar {        display: none;      }      .menu-toggle {        display: block;      }      .desktop-nav {        display: none;      }      .container {        padding: 0 1.5rem;        margin-top: 1.5rem;      }      .post-card {        padding: 2rem;      }      .post-title {        font-size: 2.1rem;      }      .toc {        position: static;        padding: 1.2rem;      }      .related-posts-grid {        grid-template-columns: 1fr;      }    }    @media (max-width: 768px) {      .post-title {        font-size: 1.9rem;      }      .featured-image {        max-height: 380px;      }      .post-content {        font-size: 1.02rem;      }      .post-content li {        padding-left: 1.5rem;      }      .social-share {        justify-content: center;        flex-wrap: wrap;      }      .footer {        grid-template-columns: 1fr;        text-align: center;      }      .footer .social-links {        justify-content: center;      }      .toc {        font-size: 0.95rem;      }      .toc h3 {        font-size: 1.1rem;      }      .related-post-card img {        height: 120px;      }      .related-info h4 {        font-size: 1rem;      }      .reading-mode-button {        padding: 0.6rem 1.2rem;        font-size: 0.95rem;      }    }    @media (max-width: 480px) {      .post-card {        padding: 1.5rem;      }      .post-title {        font-size: 1.7rem;      }      .post-meta {        gap: 1rem;        font-size: 0.95rem;      }      .header {        padding: 1rem 1.5rem;      }      .toc {        padding: 1rem;      }    }