/* OpenLCB C Library - Documentation Overviews */

:root {
    --primary: #2c3e50;
    --primary-light: #34495e;
    --accent: #3498db;
    --accent-dark: #2980b9;
    --bg: #ffffff;
    --bg-alt: #f8f9fa;
    --bg-code: #f4f4f4;
    --border: #e0e0e0;
    --text: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --sidebar-width: 280px;
    --header-height: 56px;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 16px);
}

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

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 24px;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.site-header h1 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.site-header h1 a {
    color: #fff;
    text-decoration: none;
}

.site-header .header-links {
    margin-left: auto;
    display: flex;
    gap: 16px;
    align-items: center;
}

.site-header .header-links a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.site-header .header-links a:hover {
    color: #fff;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    margin-right: 16px;
    padding: 4px;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px 0;
    z-index: 900;
    transition: transform 0.3s ease;
}

.sidebar-section {
    margin-bottom: 8px;
}

.sidebar-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    padding: 8px 20px 4px;
}

.sidebar a {
    display: block;
    padding: 5px 20px 5px 28px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.4;
    transition: background 0.15s, color 0.15s;
    border-left: 3px solid transparent;
}

.sidebar a:hover {
    background: rgba(0,0,0,0.04);
    color: var(--text);
}

.sidebar a.active {
    background: rgba(52, 152, 219, 0.08);
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 32px 48px 64px;
    max-width: 960px;
}

/* Typography */
.main-content h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
}

.main-content .subtitle {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.main-content h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.main-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-light);
    margin-top: 32px;
    margin-bottom: 12px;
}

.main-content h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-top: 24px;
    margin-bottom: 8px;
}

.main-content p {
    margin-bottom: 16px;
}

.main-content ul, .main-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.main-content li {
    margin-bottom: 6px;
}

.main-content a {
    color: var(--accent);
    text-decoration: none;
}

.main-content a:hover {
    text-decoration: underline;
}

/* Code */
code {
    font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
    font-size: 0.875em;
    background: var(--bg-code);
    padding: 2px 6px;
    border-radius: 3px;
    color: #c7254e;
}

pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px 20px;
    overflow-x: auto;
    margin-bottom: 20px;
    line-height: 1.5;
}

pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    color: var(--text);
    font-size: 13px;
}

/* Syntax highlighting basics */
.kw { color: #8959a8; font-weight: 600; }
.ty { color: #4271ae; }
.fn { color: #4271ae; }
.st { color: #718c00; }
.cm { color: #8e908c; font-style: italic; }
.nu { color: #f5871f; }
.pp { color: #c82829; }

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    font-size: 14px;
}

thead {
    background: var(--primary);
    color: #fff;
}

th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
}

td {
    padding: 9px 14px;
    border-bottom: 1px solid var(--border);
}

tbody tr:hover {
    background: rgba(52, 152, 219, 0.04);
}

td code {
    font-size: 12px;
}

/* Mermaid diagrams */
.mermaid {
    margin: 24px 0;
    text-align: center;
}

.diagram-container {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
}

.diagram-container .caption {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 12px;
    font-style: italic;
}

/* Callout boxes */
.callout {
    border-left: 4px solid;
    padding: 16px 20px;
    margin: 20px 0;
    border-radius: 0 6px 6px 0;
    font-size: 14px;
}

.callout p:last-child {
    margin-bottom: 0;
}

.callout-title {
    font-weight: 700;
    margin-bottom: 6px;
    font-size: 14px;
}

.callout-info {
    border-color: var(--info);
    background: rgba(52, 152, 219, 0.06);
}

.callout-info .callout-title { color: var(--info); }

.callout-warning {
    border-color: var(--warning);
    background: rgba(243, 156, 18, 0.06);
}

.callout-warning .callout-title { color: var(--warning); }

.callout-danger {
    border-color: var(--danger);
    background: rgba(231, 76, 60, 0.06);
}

.callout-danger .callout-title { color: var(--danger); }

.callout-success {
    border-color: var(--success);
    background: rgba(39, 174, 96, 0.06);
}

.callout-success .callout-title { color: var(--success); }

/* Chapter navigation */
.chapter-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.chapter-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    transition: border-color 0.2s, background 0.2s;
}

.chapter-nav a:hover {
    border-color: var(--accent);
    background: rgba(52, 152, 219, 0.04);
    text-decoration: none;
}

.chapter-nav .prev::before { content: "\2190\00a0"; }
.chapter-nav .next::after { content: "\00a0\2192"; }

/* File reference links */
.file-ref {
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    color: var(--accent);
    text-decoration: none;
    background: rgba(52, 152, 219, 0.08);
    padding: 2px 6px;
    border-radius: 3px;
}

/* Cross-reference badges */
.xref {
    display: inline-block;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    color: var(--text-light);
    text-decoration: none;
    white-space: nowrap;
}

.xref:hover {
    background: rgba(52, 152, 219, 0.08);
    border-color: var(--accent);
    text-decoration: none;
}

/* Index page cards */
.part-group {
    margin-bottom: 32px;
}

.part-title {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent);
    margin-bottom: 12px;
}

.chapter-list {
    list-style: none;
    padding: 0;
}

.chapter-list li {
    margin: 0;
}

.chapter-list a {
    display: block;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 6px;
    color: var(--text);
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s, transform 0.15s;
}

.chapter-list a:hover {
    border-color: var(--accent);
    background: rgba(52, 152, 219, 0.04);
    transform: translateX(4px);
    text-decoration: none;
}

.chapter-list .ch-number {
    font-weight: 700;
    color: var(--accent);
    margin-right: 8px;
}

.chapter-list .ch-desc {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
    margin-left: 48px;
}

/* Struct/type definition blocks */
.struct-def {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    margin: 16px 0;
}

.struct-def h4 {
    margin-top: 0;
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 15px;
    color: var(--accent-dark);
}

.field-table {
    width: 100%;
    margin-top: 12px;
}

.field-table th {
    background: transparent;
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    padding: 4px 8px;
}

.field-table td {
    padding: 6px 8px;
    font-size: 13px;
}

/* Responsive */
@media (max-width: 900px) {
    .menu-toggle {
        display: block;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 24px 20px 48px;
    }
}

@media (max-width: 600px) {
    .main-content h1 {
        font-size: 24px;
    }

    .main-content h2 {
        font-size: 20px;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 6px 8px;
    }
}

/* Print */
@media print {
    .site-header, .sidebar, .menu-toggle, .chapter-nav {
        display: none;
    }

    .main-content {
        margin: 0;
        padding: 0;
        max-width: none;
    }
}