:root {
    --bg-color: #000000;
    --sidebar-bg: #0a0a0a;
    --text-color: #e5e5e5;
    --text-muted: #a3a3a3;
    --primary-color: #8b5cf6; /* Violet */
    --primary-hover: #7c3aed;
    --border-color: #262626;
    --code-bg: #111111;
    --code-text: #e5e5e5;
    --accent-color: #06b6d4; /* Cyan */
    --sidebar-width: 300px; /* Increased width */
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--bg-color);
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--sidebar-bg);
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
}

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 2.5rem;
    display: block;
    text-decoration: none;
    letter-spacing: -0.5px;
}

.brand span {
    color: var(--primary-color);
}

.nav-group {
    margin-bottom: 2rem;
}

.nav-header {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.nav-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    margin-bottom: 2px;
}

.nav-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    background-color: rgba(139, 92, 246, 0.15);
    color: var(--primary-color);
    font-weight: 500;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 4rem 5rem;
    max-width: 1100px;
    width: 100%;
    transition: margin-left 0.3s ease-in-out;
}

/* Toggle Button */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.25rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

/* Overlay */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 900;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay.active {
    display: block;
    opacity: 1;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: #ffffff;
    letter-spacing: -1px;
    line-height: 1.1;
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
    color: #ffffff;
    letter-spacing: -0.5px;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: #ffffff;
}

p {
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

a:hover {
    border-bottom-color: var(--primary-color);
}

/* Code Blocks */
pre {
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0 2rem 0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;
}

p code, li code {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--accent-color);
}

/* Syntax Highlighting Colors */
.kw { color: #c084fc; font-weight: bold; } /* Keyword - Purple */
.str { color: #86efac; } /* String - Green */
.num { color: #fca5a5; } /* Number - Red */
.fn { color: #93c5fd; } /* Function - Blue */
.com { color: #6b7280; font-style: italic; } /* Comment - Gray */
.type { color: #fbbf24; } /* Type - Amber */

.note {
    background-color: rgba(6, 182, 212, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 1.25rem;
    margin-bottom: 2rem;
    border-radius: 0 8px 8px 0;
}

.note strong {
    color: var(--accent-color);
    display: block;
    margin-bottom: 0.5rem;
}

.warning {
    background-color: rgba(239, 68, 68, 0.1);
    border-left: 4px solid #ef4444;
    padding: 1.25rem;
    margin-bottom: 2rem;
    border-radius: 0 8px 8px 0;
}

.warning strong {
    color: #ef4444;
    display: block;
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 3rem 2rem;
    }

    .menu-toggle {
        display: block;
    }

    h1 {
        font-size: 2.5rem;
    }
}