:root {
      --sidebar-width: 280px;
      --accent-color: #02F9F2;
      --text-color: #1f2937;
      --muted-color: #6b7280;
      --bg-color: #f9fafb;
      --code-bg: #1e1e1e;
      --border-color: #e5e7eb;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      color: var(--text-color);
      background-color: var(--bg-color);
      display: flex;
      justify-content: space-between;
    }

    main {
      flex: 1;
      padding: 50px 70px;
      background-color: #fff;
      box-shadow: -2px 0 6px rgba(0, 0, 0, 0.02);
      border-right: 1px solid var(--border-color);
      min-height: 100vh;
      max-width: calc(100% - var(--sidebar-width));
    }

    h1, h2, h3 {
      color: #111827;
      scroll-margin-top: 100px;
    }

    h1 {
      font-size: 30px;
      margin-bottom: 20px;
    }

    h2 {
      font-size: 22px;
      margin-top: 45px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 6px;
    }

    h3 {
      font-size: 18px;
      margin-top: 25px;
    }

    p, ul, ol {
      line-height: 1.75;
      font-size: 16px;
      color: #374151;
    }

    ul, ol {
      margin-left: 20px;
    }

    code {
      background-color: #f3f4f6;
      padding: 3px 6px;
      border-radius: 5px;
      font-family: Consolas, monospace;
      font-size: 14px;
      color: #111;
    }

    pre {
      position: relative;
      background-color: var(--code-bg);
      border-radius: 10px;
      padding: 20px;
      margin-top: 15px;
      margin-bottom: 25px;
      overflow-x: auto;
      box-shadow: 0 3px 6px rgba(0,0,0,0.1);
    }

    pre button.copy-btn {
      position: absolute;
      top: 10px;
      right: 10px;
      background-color: rgba(255,255,255,0.1);
      color: #fff;
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: 5px;
      padding: 3px 8px;
      font-size: 12px;
      cursor: pointer;
      transition: 0.3s;
    }

    pre button.copy-btn:hover {
      background-color: rgba(255,255,255,0.2);
    }

    img {
      width: 100%;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-top: 10px;
      margin-bottom: 25px;
      box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    html {
      scroll-behavior: smooth;
    }

    /* Sidebar */
    aside {
      position: fixed;
      top: 0;
      right: 0;
      width: var(--sidebar-width);
      height: 100vh;
      background-color: #fff;
      border-left: 1px solid var(--border-color);
      padding: 25px 20px;
      overflow-y: auto;
      box-shadow: -2px 0 8px rgba(0, 0, 0, 0.03);
    }

    aside h2 {
      font-size: 15px;
      color: var(--muted-color);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
    }

    aside ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    aside ul li {
      margin: 6px 0;
    }

    aside ul li a {
      color: var(--text-color);
      text-decoration: none;
      font-size: 15px;
      padding: 6px 12px;
      display: block;
      border-radius: 6px;
      transition: 0.2s;
    }

    aside ul li a:hover {
      background-color: #f3f4f6;
    }

    aside ul li a.active {
      background-color: var(--accent-color);
      color: white;
    }

    @media (max-width: 900px) {
      aside {
        display: none;
      }
      main {
        max-width: 100%;
        padding: 30px;
      }
    }