/* =============================================================================
   Header - fixed top with pixel border
   ============================================================================= */

.docs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(10, 10, 12, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: var(--pixel-border) solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 100;
}

.docs-header::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--primary-dim),
        transparent
    );
}

.docs-header .logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
    text-decoration: none;
    margin-right: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: -0.02em;
}

.docs-header .logo:hover {
    color: var(--primary);
}

.docs-header .logo:hover .logo-icon {
    box-shadow: 0 0 12px var(--primary-glow);
}

.docs-header .logo-icon {
    width: 26px;
    height: 26px;
    background: linear-gradient(135deg, var(--primary) 0%, #cc3333 100%);
    border: var(--pixel-border) solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    color: white;
    transition: box-shadow 0.2s ease;
    image-rendering: pixelated;
}

.docs-header nav {
    display: flex;
    gap: 0.25rem;
}

.docs-header nav a {
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    padding: 0.5rem 0.875rem;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    position: relative;
}

.docs-header nav a:hover {
    color: var(--text);
    background: var(--bg-subtle);
    border-color: var(--border);
}

.docs-header nav a.active {
    color: var(--primary);
    background: var(--primary-dim);
    border-color: var(--primary);
}

.docs-header nav a.active::before {
    content: ">";
    margin-right: 0.35rem;
    opacity: 0.7;
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.github-link {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
}

.github-link:hover {
    color: var(--text);
    background: var(--bg-subtle);
    border-color: var(--border);
}

.github-link svg {
    width: 18px;
    height: 18px;
}

/* =============================================================================
   Layout container
   ============================================================================= */

.docs-container {
    display: flex;
    padding-top: var(--header-h);
    min-height: 100vh;
}

/* =============================================================================
   Sidebar - fixed with terminal style
   ============================================================================= */

.docs-sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    width: var(--sidebar-w);
    height: calc(100vh - var(--header-h));
    background: var(--bg-elevated);
    border-right: var(--pixel-border) solid var(--border);
    padding: 1.5rem 0.75rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) transparent;
}

.docs-sidebar::-webkit-scrollbar {
    width: 6px;
}

.docs-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.docs-sidebar::-webkit-scrollbar-thumb {
    background: var(--border-light);
}

.sidebar-section {
    margin-bottom: 1.75rem;
}

.sidebar-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.6rem;
    letter-spacing: 0.1em;
    padding-left: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-title::before {
    content: "//";
    opacity: 0.5;
}

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

.sidebar-links li {
    margin-bottom: 1px;
}

.sidebar-links a {
    font-family: var(--font-mono);
    display: block;
    padding: 0.45rem 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.1s ease;
    border-left: 2px solid transparent;
    position: relative;
}

.sidebar-links a:hover {
    background: var(--bg-hover);
    color: var(--text);
    border-left-color: var(--border-light);
}

.sidebar-links a.active {
    background: var(--primary-dim);
    color: var(--primary);
    border-left-color: var(--primary);
}

.sidebar-links a.active::before {
    content: "→";
    position: absolute;
    right: 0.75rem;
    opacity: 0.5;
}

/* =============================================================================
   TOC Sidebar - fixed right
   ============================================================================= */

.docs-toc {
    position: fixed;
    top: var(--header-h);
    right: 0;
    width: var(--toc-w);
    height: calc(100vh - var(--header-h));
    padding: 1.5rem 1rem 6rem 1rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) transparent;
    background: linear-gradient(to left, rgba(10, 10, 12, 0.5), transparent);
}

.docs-toc::-webkit-scrollbar {
    width: 6px;
}

.docs-toc::-webkit-scrollbar-track {
    background: transparent;
}

.docs-toc::-webkit-scrollbar-thumb {
    background: var(--border-light);
}

.toc-title {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.toc-title::before {
    content: "#";
    color: var(--primary);
    opacity: 0.6;
}

.docs-toc > ul,
.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-left: 1px solid var(--border);
}

.docs-toc ul ul {
    list-style: none;
    padding: 0;
    margin: 0;
    border-left: none;
}

.docs-toc li,
.toc-list li {
    margin-bottom: 0;
}

.docs-toc a,
.toc-list a {
    font-family: var(--font-mono);
    display: block;
    padding: 0.3rem 0.75rem;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.7rem;
    line-height: 1.4;
    transition: all 0.1s ease;
    border-left: 1px solid transparent;
    margin-left: -1px;
}

.docs-toc a:hover,
.toc-list a:hover {
    color: var(--text-muted);
    border-left-color: var(--border-light);
}

.docs-toc a.active,
.toc-list a.active {
    color: var(--text);
    border-left-color: var(--primary);
    background: linear-gradient(to right, var(--primary-dim), transparent);
}

/* Nested TOC levels - indentation */
.docs-toc ul ul a {
    padding-left: 1.25rem;
    font-size: 0.65rem;
}

.docs-toc ul ul ul a {
    padding-left: 1.75rem;
    font-size: 0.65rem;
}

.toc-list .toc-h3 {
    padding-left: 1.25rem;
    font-size: 0.65rem;
}

.toc-list .toc-h4 {
    padding-left: 1.75rem;
    font-size: 0.65rem;
}

/* =============================================================================
   Main content area
   ============================================================================= */

.docs-main {
    flex: 1;
    margin-left: var(--sidebar-w);
    margin-right: var(--toc-w);
    padding: 2.5rem 3.5rem;
    max-width: calc(100% - var(--sidebar-w) - var(--toc-w));
    min-width: 0;
}

.docs-main > *:not(.docs-footer) {
    max-width: 800px;
}

/* When TOC is hidden, expand main content */
.docs-main.no-toc {
    margin-right: 0;
    max-width: calc(100% - var(--sidebar-w));
}