:root {
    --bg: #ffffff;
    --fg: #1a1a2e;
    --sidebar-bg: #f5f5f7;
    --sidebar-width: 260px;
    --code-bg: #f0f0f3;
    --code-border: #dcdce0;
    --link: #2563eb;
    --link-hover: #1d4ed8;
    --heading: #111827;
    --border: #e5e7eb;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

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

body {
    font-family: var(--font-body);
    color: var(--fg);
    background: var(--bg);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* Sidebar navigation */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    overflow-y: auto;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    padding: 1.5rem 1rem;
    z-index: 100;
}

.sidebar h2 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    margin-bottom: 0.75rem;
}

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

.sidebar li {
    margin-bottom: 0.25rem;
}

.sidebar a {
    display: block;
    padding: 0.25rem 0.5rem;
    color: var(--fg);
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.85rem;
}

.sidebar a:hover {
    background: var(--border);
    color: var(--link);
}

/* Main content area */
.content {
    margin-left: var(--sidebar-width);
    max-width: 52rem;
    padding: 2rem 3rem;
    flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--heading);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
}

h1 { font-size: 1.8rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }

p {
    margin-bottom: 1em;
}

a {
    color: var(--link);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* Code */
code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 3px;
    padding: 0.15em 0.35em;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin-bottom: 1em;
}

pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.85rem;
}

/* Lists */
ul, ol {
    margin-bottom: 1em;
    padding-left: 1.5em;
}

li {
    margin-bottom: 0.25em;
}

/* Bold / italic */
strong { font-weight: 600; }
em { font-style: italic; }

/* Tables */
table {
    border-collapse: collapse;
    margin-bottom: 1em;
    width: 100%;
}

th, td {
    border: 1px solid var(--border);
    padding: 0.5em 0.75em;
    text-align: left;
}

th {
    background: var(--sidebar-bg);
    font-weight: 600;
}

/* Version badge */
.version {
    display: inline-block;
    font-size: 0.8rem;
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 4px;
    padding: 0.1em 0.5em;
    margin-left: 0.5em;
    vertical-align: middle;
}

/* Mobile: collapse sidebar */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .content {
        margin-left: 0;
        padding: 1.5rem 1rem;
    }
    body {
        flex-direction: column;
    }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1a1a2e;
        --fg: #e0e0e0;
        --sidebar-bg: #16213e;
        --code-bg: #0d1117;
        --code-border: #2a2a4a;
        --link: #64b5f6;
        --link-hover: #90caf9;
        --heading: #f0f0f0;
        --border: #2a2a4a;
    }

    .sidebar h2 {
        color: #a0a0b0;
    }
}