:root {
    --bg-color: #ffffff;
    --text-color: #2c3e50;
    --primary-color: #1a365d;
    --secondary-color: #2b6cb0;
    --accent-color: #3182ce;
    --code-bg: #f7fafc;
    --code-border: #e2e8f0;
    --code-text: #2d3748;
    --toc-bg: #f8fafc;
    --nav-width: 280px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    display: flex;
}

/* Fixed Left Navigation Bar Layout */
.sidebar-nav {
    margin-top: 60px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--nav-width);
    background-color: var(--toc-bg);
    border-right: 1px solid var(--code-border);
    overflow-y: auto;
    padding: 20px 10px;
    box-sizing: border-box;
}

.sidebar-nav h3 {
    font-size: 16px;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0 15px;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--code-border);
    padding-bottom: 8px;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.sidebar-nav a {
    display: block;
    padding: 6px 15px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}

.sidebar-nav a:hover {
    background-color: var(--code-border);
    color: var(--secondary-color);
    text-decoration: none;
}

.sidebar-nav .nav-sub-1 a { padding-left: 30px; font-size: 13.5px; }
.sidebar-nav .nav-sub-2 a { padding-left: 45px; font-size: 13px; opacity: 0.85; }

/* Main Content Panel Layout */
.main-container {
    margin-top: 150px;
    margin-left: var(--nav-width);
    flex-grow: 1;
    max-width: 1800px;
    padding: 40px 50px;
    box-sizing: border-box;
}

h1 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-color);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 30px;
    border-bottom: 4px solid var(--primary-color);
    padding-bottom: 15px;
    margin-top: 0;
}

h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 50px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--code-border);
    padding-bottom: 5px;
    scroll-margin-top: 20px;
}

h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-top: 30px;
    margin-bottom: 15px;
    scroll-margin-top: 20px;
}

h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-color);
    margin-top: 20px;
    margin-bottom: 10px;
}

p {
    margin: 0 0 15px 0;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

ul, ol {
    margin: 0 0 20px 0;
    padding-left: 25px;
}

li {
    margin-bottom: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 15px;
}

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

th {
    background-color: #edf2f7;
    color: var(--primary-color);
    font-weight: 700;
}

tr:nth-child(even) {
    background-color: #f7fafc;
}


p code {
    background-color: #edf2f7;
    padding: 2px 6px;
    border-radius: 4px;
    color: #db2777;
}


}

.comment {
    color: #718096;
    font-style: italic;
}

.placeholder-section {
    background-color: #fffaf0;
    border: 1px dashed #dd6b20;
    border-radius: 6px;
    padding: 15px;
    margin-top: 15px;
    color: #dd6b20;
    font-style: italic;
}

@media (max-width: 768px) {
    body { display: block; }
    .sidebar-nav { position: relative; width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--code-border); }
    .main-container { margin-left: 0; padding: 20px; }
}

        /* ── New Dark Code Container Styles ── */
        .code-container {
            position: relative;
            margin: 16px 0;
            background-color: #131314;
            border-radius: 16px;
            padding: 16px 20px 20px 20px;
            box-sizing: border-box;
        }

        .code-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 10px;
            color: #e3e3e3;
            font-size: 12px;
            font-weight: 600;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            letter-spacing: 0.5px;
            border-bottom: 1px solid #2a2a2c;
            margin-bottom: 10px;
        }

        .header-controls {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .control-btn {
            background: transparent;
            border: none;
            color: #9aa0a6;
            cursor: pointer;
            padding: 5px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s, background-color 0.2s;
        }

        .control-btn:hover {
            color: #ffffff;
            background-color: #202124;
        }

        .code-scroll-wrapper {
            overflow-x: auto;
            overflow-y: auto;
        }

        .code-scroll-wrapper::-webkit-scrollbar { width: 6px; height: 6px; }
        .code-scroll-wrapper::-webkit-scrollbar-track { background: #131314; }
        .code-scroll-wrapper::-webkit-scrollbar-thumb { background: #3c4043; border-radius: 10px; }
        .code-scroll-wrapper::-webkit-scrollbar-thumb:hover { background: #4f5357; }

        .code-scroll-wrapper pre {
            margin: 0;
            white-space: pre;
        }

        .code-scroll-wrapper code {
            color: #e3e3e3;
            font-size: 13px;
            line-height: 1.65;
            font-family: 'Fira Code', Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
        }

        .code-scroll-wrapper .comment {
            color: #9aa0a6;
            font-style: italic;
        }

 .nav-logo {
      font-family: 'Fraunces', serif;
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: -0.01em;
    }

    .nav-logo span { color: var(--cobalt); }

    .nav-links {
      margin-left: auto;
      display: flex;
      gap: 2px;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.72rem;
      font-weight: 500;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.55);
      text-decoration: none;
      padding: 6px 12px;
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
    }

    .nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); }
    .nav-links a.active { color: #fff; }

 #topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 60px;
    background: #0d1b2a;
    display: flex;
    align-items: center;
    padding: 0 24px;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0,0,0,0.3);
    gap: 16px;
  }

#topbar h6 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.02em;
</style>

<header id="topbar">

  
	
  <h6>IT Fundamentals Handbook</h6 >
	
    <div class="nav-links">
      <li><a href="index">Home</a></li>
      <li><a href="Resume">Résumé</a></li>
      <li><a href="cover">Cover Letter</a></li>
      <li><a href="Projects">IT Notes</a></li>
      <li><a href="Coding">Projects</a></li>
      <li><a href="contact">Contact</a></li>
    </div>