/* =============================================================================
   Header — matches landing nav style
   ============================================================================= */

.docs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(13, 10, 7, 0.78);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 100;
}

.docs-header .logo {
    text-decoration: none;
    margin-right: 2.5rem;
    display: flex;
    align-items: center;
    border-bottom: none;
}

.docs-header .logo:hover {
    opacity: 0.8;
    border-bottom: none;
}

.docs-header .logo img {
    border-radius: 0;
    border: none;
}

.docs-header nav {
    display: flex;
    gap: 0.125rem;
}

.docs-header nav a {
    font-family: var(--font-sans);
    color: #888;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 400;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    border: none;
    border-bottom: none;
    transition: color 0.2s ease;
}

.docs-header nav a:hover {
    color: #fff;
    border-bottom: none;
}

.docs-header nav a.active {
    color: #fff;
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.header-link {
    font-family: var(--font-sans);
    color: #888;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 400;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    border: none;
    border-bottom: none;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.header-link:hover {
    color: #fff;
    border-bottom: none;
}

.github-link {
    color: #888;
    text-decoration: none;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    border: none;
    border-bottom: none;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
}

.github-link:hover {
    color: #fff;
    border-bottom: none;
}

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

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

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

/* =============================================================================
   Sidebar - fixed left navigation
   ============================================================================= */

.docs-sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    width: var(--sidebar-w);
    height: calc(100vh - var(--header-h));
    background: var(--bg);
    border-right: 1px solid var(--border);
    padding: 1.25rem 0.75rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) transparent;
}

.docs-sidebar::-webkit-scrollbar {
    width: 5px;
}

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

.docs-sidebar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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

.sidebar-section {
    margin-bottom: 1.5rem;
}

.sidebar-title {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
    letter-spacing: 0.08em;
    padding-left: 0.75rem;
}

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

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

.sidebar-links a {
    font-family: var(--font-sans);
    display: block;
    padding: 0.4rem 0.75rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.835rem;
    font-weight: 400;
    transition: all 0.12s ease;
    border-radius: 6px;
    border-left: 2px solid transparent;
    border-bottom: none;
    margin-left: 0;
}

.sidebar-links a:hover {
    background: var(--bg-hover);
    color: var(--text);
    border-bottom: none;
}

.sidebar-links a.active {
    background: var(--primary-dim);
    color: var(--primary);
    font-weight: 500;
    border-bottom: none;
}

/* Nested groups (e.g., Features sub-categories) */
.sidebar-group {
    margin-top: 0.5rem;
}

.sidebar-group-title {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-dim);
    padding: 0.35rem 0.75rem 0.15rem;
    letter-spacing: 0.03em;
}

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

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

.sidebar-sublinks a {
    font-family: var(--font-sans);
    display: block;
    padding: 0.3rem 0.75rem 0.3rem 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 400;
    transition: all 0.12s ease;
    border-radius: 6px;
    border-bottom: none;
}

.sidebar-sublinks a:hover {
    background: var(--bg-hover);
    color: var(--text);
    border-bottom: none;
}

.sidebar-sublinks a.active {
    background: var(--primary-dim);
    color: var(--primary);
    font-weight: 500;
    border-bottom: none;
}

/* =============================================================================
   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 4rem 1rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.docs-toc::-webkit-scrollbar {
    width: 5px;
}

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

.docs-toc::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.toc-title {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    letter-spacing: 0.08em;
}

.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-sans);
    display: block;
    padding: 0.3rem 0.75rem;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.78rem;
    line-height: 1.5;
    transition: all 0.12s ease;
    border-left: 1px solid transparent;
    margin-left: -1px;
    border-bottom: none;
}

.docs-toc a:hover,
.toc-list a:hover {
    color: var(--text-muted);
    border-left-color: var(--border-light);
    border-bottom: none;
}

.docs-toc a.active,
.toc-list a.active {
    color: var(--text);
    border-left-color: var(--primary);
    border-bottom: none;
}

/* Nested TOC levels - indentation */
.docs-toc ul ul a {
    padding-left: 1.25rem;
    font-size: 0.74rem;
}

.docs-toc ul ul ul a {
    padding-left: 1.75rem;
    font-size: 0.74rem;
}

.toc-list .toc-h3 {
    padding-left: 1.25rem;
    font-size: 0.74rem;
}

.toc-list .toc-h4 {
    padding-left: 1.75rem;
    font-size: 0.74rem;
}

/* =============================================================================
   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));
}