/* Custom font declaration */
    @font-face {
      font-family: 'Vayu';
      src: url('../fonts/Vayu-Regular.otf') format('opentype'),
           url('../fonts/Vayu-Regular.ttf') format('truetype');
      font-weight: normal;
      font-style: normal;
    }

    /* --- Color Variables (Dark & Light) --- */
    :root {
      --bg-primary: #1e1e1e;
      --bg-secondary: #2a2a2a;
      --bg-tertiary: #333333;
      --bg-hover: #383838;
      --border-color: #383838;
      --border-hover: #e0e0e0;
      --text-primary: #e0e0e0;
      --text-secondary: #919191;
      --text-tertiary: #b0a999;
      --text-white: #ffffff;
      --text-muted: #777;
      --accent-color: #347a74;
      --shadow-color: rgba(0, 0, 0, 0.5);
      --shadow-light: rgba(224, 224, 224, 0.1);
    }

    [data-theme="light"] {
      --bg-primary: #f8f9fa;
      --bg-secondary: #ffffff;
      --bg-tertiary: #f1f3f4;
      --bg-hover: #e8eaed;
      --border-color: #dadce0;
      --border-hover: #1e1e1e;
      --text-primary: #202124;
      --text-secondary: #3c4043;
      --text-tertiary: #5f6368;
      --text-white: #202124;
      --text-muted: #9aa0a6;
      --accent-color: #00B8A9;
      --shadow-color: rgba(0, 0, 0, 0.1);
      --shadow-light: rgba(0, 0, 0, 0.1);
    }

    /* --- Base Styles --- */
    body {
      font-family: 'Vayu', sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      margin: 0;
      padding: 0;
      line-height: 1.6;
      font-size: 110%;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    /* Icon styling */
    .fa-solid, .fa-brands {
      color: var(--accent-color);
    }

    /* --- Navigation --- */
    nav {
      display: grid;
      grid-template-columns: 0.5fr 2fr 0.5fr;
      gap: 30px;
      padding: 20px;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      background: var(--bg-primary);
      z-index: 100;
      transition: background-color 0.3s ease, border-color 0.3s ease;
    }

    .nav-content {
      grid-column: 2;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }

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

    .logo {
      font-size: 20px;
      font-weight: bold;
      color: var(--text-tertiary);
    }

    .logo a:hover {
      color: var(--accent-color);
    }

    .nav-center {
      display: flex;
      justify-content: center;
      align-items: center;
      flex: 1;
    }

    .nav-menu {
      display: flex;
      gap: 20px;
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .nav-menu-mobile {
      display: none;
    }

    .nav-item:not(:last-child)::after {
      content: "|";
      margin-left: 10px;
      color: var(--text-muted);
    }

    .nav-link {
      text-decoration: none;
      color: var(--text-tertiary);
      font-size: 16px;
      transition: color 0.3s ease;
    }

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

    .nav-link.active {
      color: var(--accent-color);
    }

    .theme-toggle {
      background: none;
      border: 2px solid var(--border-color);
      color: var(--text-primary);
      font-size: 18px;
      cursor: pointer;
      padding: 8px 12px;
      border-radius: 50%;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
    }

    .theme-toggle:hover {
      border-color: var(--accent-color);
      background-color: var(--bg-hover);
      transform: scale(1.1);
    }

    .mobile-theme {
      display: none;
    }

    .desktop-theme {
      display: inline-flex;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-white);
      font-size: 20px;
      cursor: pointer;
      padding: 0;
    }

    /* --- Main Container --- */
    .container {
      display: grid;
      grid-template-columns: 0.5fr 2fr 0.5fr;
      gap: 30px;
      padding: 0 20px;
      margin: 30px 0;
    }

    main {
      grid-column: 2;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    /* --- Breadcrumb --- */
    .breadcrumb {
      font-size: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 5px;
      align-items: center;
      color: var(--text-secondary);
    }

    .breadcrumb a {
      color: var(--text-tertiary);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .breadcrumb a:hover {
      color: var(--accent-color);
    }

    .breadcrumb .separator {
      color: var(--text-muted);
      margin: 0 5px;
    }

    .breadcrumb .current {
      color: var(--accent-color);
    }

    /* --- Blog Post Header --- */
    .blog-post-header {
      padding: 20px;
      transition: all 0.3s ease;
    }

    .blog-title {
      font-size: 31px;
      font-weight: bold;
      color: var(--text-white);
      margin: 0 0 15px 0;
      line-height: 1.3;
    }

    .blog-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .blog-date {
      font-size: 15px;
      color: var(--text-tertiary);
    }

    .blog-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .tag {
      background: var(--bg-tertiary);
      color: var(--text-tertiary);
      padding: 4px 10px;
      font-size: 12px;
      border-radius: 3px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      transition: background-color 0.3s ease;
    }

    /* --- Blog Content --- */
    .blog-content {
      background: var(--bg-primary);
      padding: 40px;
      border: 1px solid var(--border-color);
      border-top: none;
      font-size: 15px;
      line-height: 1.7;
      color: var(--text-primary);
      transition: background-color 0.3s ease;
    }

    .blog-content h1 {
      font-size: 31px;
      color: var(--text-white);
      margin: 30px 0 20px 0;
      line-height: 1.3;
    }

    .blog-content h2 {
      font-size: 26px;
      color: var(--text-white);
      margin: 30px 0 15px 0;
      line-height: 1.3;
    }

    .blog-content h3 {
      font-size: 22px;
      color: var(--text-white);
      margin: 25px 0 15px 0;
      line-height: 1.3;
    }

    .blog-content h4 {
      font-size: 20px;
      color: var(--text-white);
      margin: 20px 0 10px 0;
      line-height: 1.3;
    }

    .blog-content h5,
    .blog-content h6 {
      font-size: 18px;
      color: var(--text-white);
      margin: 15px 0 10px 0;
      line-height: 1.3;
    }

    .blog-content p {
      margin: 10px 0;
      color: var(--text-primary);
    }

    .blog-content strong {
      color: var(--text-white);
    }

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

    .blog-content a {
      color: var(--accent-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .blog-content a:hover {
      color: var(--text-white);
      text-decoration: underline;
    }

    .blog-content code {
      background: var(--bg-secondary);
      color: var(--accent-color);
      padding: 2px 6px;
      border-radius: 3px;
      font-family: 'Courier New', monospace;
      font-size: 15px;
    }

    .blog-content pre {
      background: var(--bg-secondary);
      color: var(--text-primary);
      padding: 20px;
      border-radius: 5px;
      overflow-x: auto;
      margin: 20px 0;
      border-left: 4px solid var(--accent-color);
    }

    .blog-content pre code {
      background: none;
      color: inherit;
      padding: 0;
    }

    .blog-content blockquote {
      border-left: 4px solid var(--accent-color);
      padding-left: 20px;
      margin: 20px 0;
      font-style: italic;
      color: var(--text-tertiary);
    }

    .blog-content ul,
    .blog-content ol {
      padding-left: 25px;
      margin: 15px 0;
    }

    .blog-content li {
      margin: 8px 0;
      color: var(--text-primary);
    }

    .blog-content table {
      width: 100%;
      border-collapse: collapse;
      margin: 20px 0;
    }

    .blog-content th,
    .blog-content td {
      border: 1px solid var(--border-color);
      padding: 12px;
      text-align: left;
    }

    .blog-content th {
      background: var(--bg-primary);
      color: var(--text-white);
      font-weight: bold;
    }

    .blog-content td {
      background: var(--bg-secondary);
    }

    .blog-content img {
      max-width: 100%;
      height: auto;
      margin: 20px 0;
      border-radius: 5px;
    }

    .blog-content hr {
      border: 0;
      height: 1px;
      background: var(--border-color);
      margin: 30px 0;
    }

    /* --- Footer --- */
    footer {
      display: grid;
      grid-template-columns: 0.5fr 2fr 0.5fr;
      gap: 30px;
      padding: 20px;
      border-top: 1px solid var(--border-color);
      margin-top: 50px;
      transition: border-color 0.3s ease;
    }

    .footer-content {
      grid-column: 2;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 14px;
      color: var(--text-tertiary);
    }

    /* --- Media Queries --- */
    @media (max-width: 1200px) {
      nav {
        grid-template-columns: 0.3fr 2.4fr 0.3fr;
      }

      .container {
        grid-template-columns: 0.3fr 2.4fr 0.3fr;
      }

      .footer {
        grid-template-columns: 0.3fr 2.4fr 0.3fr;
      }
    }

    @media (max-width: 900px) {
      nav {
        grid-template-columns: 1fr;
        padding: 15px 20px;
      }

      .desktop-theme {
        display: none;
      }

      .mobile-theme {
        display: inline-flex;
        order: 1;
        margin-right: 8px;
      }

      .nav-content {
        grid-column: 1;
        flex-direction: column;
        position: relative;
        width: 100%;
      }

      .nav-top {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
      }

      .nav-right {
        gap: 15px;
      }

      .nav-center {
        display: none;
      }

      .container {
        display: block;
        padding: 0 20px;
      }

      main {
        grid-column: 1;
      }

      .menu-toggle {
        display: block;
        order: 2;
      }

      .nav-menu-mobile {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 15px;
        background: var(--bg-primary);
        border: 1px solid var(--border-color);
        border-radius: 4px;
        box-shadow: 0 4px 8px var(--shadow-color);
        padding: 0;
        gap: 0;
        position: relative;
        margin-bottom: -30px;
      }

      .nav-menu-mobile.active {
        display: flex;
      }

      .nav-item {
        border-bottom: 1px solid var(--border-color);
      }

      .nav-item:last-child {
        border-bottom: none;
      }

      .nav-item:not(:last-child)::after {
        display: none;
      }

      .nav-link {
        display: block;
        padding: 12px 20px;
        color: var(--text-tertiary);
        background: var(--bg-primary);
        transition: all 0.3s ease;
        border: none;
        width: 100%;
        box-sizing: border-box;
        text-decoration: none;
        font-size: 14px;
      }

      .nav-link:hover {
        background: var(--bg-hover);
        color: var(--accent-color);
      }

      .nav-link.active {
        background: var(--bg-hover);
        color: var(--accent-color);
      }

      .blog-meta {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
      }

      .blog-content {
        padding: 25px;
      }

      .blog-title {
        font-size: 26px;
      }
    }

    @media (max-width: 600px) {
      nav {
        padding: 8px 15px;
        margin-bottom: 5px;
      }

      .container {
        padding: 0 15px;
      }

      .nav-right {
        gap: 8px;
      }

      .theme-toggle {
        width: 28px;
        height: 28px;
        font-size: 12px;
        padding: 3px;
      }

      .logo {
        font-size: 18px;
      }

      .nav-link {
        padding: 10px 15px;
        font-size: 13px;
      }

      .menu-toggle {
        font-size: 14px;
        padding: 4px 6px;
      }

      .blog-content {
        padding: 20px;
        font-size: 14px;
      }

      .blog-title {
        font-size: 24px;
      }

      .blog-content h1 {
        font-size: 24px;
      }

      .blog-content h2 {
        font-size: 22px;
      }

      .blog-content h3 {
        font-size: 20px;
      }

      .blog-content h4 {
        font-size: 18px;
      }

      .blog-content h5,
      .blog-content h6 {
        font-size: 16px;
      }
    }