/* ==========================================================================
   NARRA DOCS MODERN DESIGN SYSTEM & STYLE ARCHITECTURE
   ========================================================================== */

:root {
    /* Fonts Families */
    --ff-font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --ff-font-title: 'Outfit', sans-serif;
    --ff-font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* Transition Dynamics */
    --ff-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --ff-radius: 12px;
    --ff-radius-sm: 8px;

    /* Theme: Dark Mode Color Tokens */
    --ff-bg: #020503;
    --ff-bg-header: rgba(2, 5, 3, 0.85);
    --ff-sidebar: #060e07;
    --ff-card: rgba(8, 16, 10, 0.65);
    --ff-border: rgba(16, 185, 129, 0.15);
    --ff-border-subtle: rgba(255, 255, 255, 0.04);
    --ff-text: #f3f4f6;
    --ff-text-muted: #9ca3af;
    --ff-accent: #10b981;
    --ff-accent-glow: rgba(16, 185, 129, 0.25);
    --ff-code-bg: #030804;
    --ff-danger: #f43f5e;
    --ff-danger-bg: rgba(244, 63, 94, 0.08);
}

/* Light Mode Override Variable Tokens */
body.light-mode {
    --ff-bg: #f8fafc;
    --ff-bg-header: rgba(248, 250, 252, 0.85);
    --ff-sidebar: #f1f5f9;
    --ff-card: #ffffff;
    --ff-border: rgba(16, 185, 129, 0.25);
    --ff-border-subtle: #e2e8f0;
    --ff-text: #1e293b;
    --ff-text-muted: #64748b;
    --ff-accent: #16a34a;
    --ff-accent-glow: rgba(22, 163, 74, 0.12);
    --ff-code-bg: #f8fafc;
    --ff-danger: #dc2626;
    --ff-danger-bg: rgba(220, 38, 38, 0.05);
}

/* Base Body and Layout Clean Ups */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--ff-bg);
    color: var(--ff-text);
    font-family: var(--ff-font-sans);
    font-size: 15px;
    line-height: 1.62;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Modern Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--ff-border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--ff-accent);
}

/* Glassmorphic Header Component */
.docs-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    background-color: var(--ff-bg-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--ff-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 100;
    transition: var(--ff-transition);
}

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

.mobile-sidebar-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--ff-text-muted);
    cursor: pointer;
    padding: 0.25rem;
}

.mobile-sidebar-toggle:hover {
    color: var(--ff-accent);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--ff-font-title);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--ff-text);
}

.brand b {
    color: var(--ff-accent);
    font-weight: 700;
}

.logo-icon {
    color: var(--ff-accent);
    filter: drop-shadow(0 0 4px var(--ff-accent-glow));
}

.header-divider {
    color: var(--ff-border);
    font-weight: 300;
}

.header-version {
    font-family: var(--ff-font-mono);
    font-size: 0.75rem;
    color: var(--ff-text-muted);
    background: var(--ff-card);
    border: 1px solid var(--ff-border-subtle);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Header Search Container */
.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    color: var(--ff-text-muted);
    pointer-events: none;
}

#docs-search {
    width: 220px;
    background-color: var(--ff-card);
    border: 1px solid var(--ff-border);
    border-radius: var(--ff-radius-sm);
    padding: 0.5rem 2.2rem 0.5rem 2.2rem;
    color: var(--ff-text);
    font-size: 0.85rem;
    outline: none;
    transition: var(--ff-transition);
}

#docs-search:focus {
    width: 280px;
    border-color: var(--ff-accent);
    box-shadow: 0 0 10px var(--ff-accent-glow);
}

.search-kbd {
    position: absolute;
    right: 0.75rem;
    font-family: var(--ff-font-mono);
    font-size: 0.7rem;
    background: var(--ff-border-subtle);
    color: var(--ff-text-muted);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    border: 1px solid var(--ff-border);
}

/* Theme Switcher Button */
.theme-toggle {
    background: transparent;
    border: none;
    color: var(--ff-text-muted);
    cursor: pointer;
    padding: 0.4rem;
    border-radius: var(--ff-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--ff-transition);
}

.theme-toggle:hover {
    color: var(--ff-accent);
    background: var(--ff-card);
}

/* Hub Redirect Link Button */
.btn-hub-link {
    background: linear-gradient(135deg, var(--ff-accent-glow), transparent);
    border: 1px solid var(--ff-border);
    color: var(--ff-text);
    padding: 0.45rem 1rem;
    font-size: 0.82rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--ff-radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--ff-transition);
}

.btn-hub-link:hover {
    border-color: var(--ff-accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--ff-accent-glow);
}

/* Layout Infrastructure */
.docs-layout {
    display: flex;
    padding-top: 64px;
    min-height: 100vh;
}

/* Left Navigation Sidebar */
.docs-sidebar {
    width: 280px;
    height: calc(100vh - 64px);
    position: fixed;
    top: 64px;
    left: 0;
    background-color: var(--ff-sidebar);
    border-right: 1px solid var(--ff-border);
    overflow-y: auto;
    z-index: 90;
    transition: var(--ff-transition);
    padding: 1.5rem 1rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.nav-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-group-title {
    font-family: var(--ff-font-title);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--ff-text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 0.5rem;
    padding-left: 0.75rem;
}

.nav-link {
    font-size: 0.85rem;
    color: var(--ff-text-muted);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--ff-radius-sm);
    display: block;
    cursor: pointer;
    transition: var(--ff-transition);
    border-left: 2px solid transparent;
}

.nav-link:hover {
    color: var(--ff-text);
    background-color: var(--ff-card);
    padding-left: 1rem;
}

.nav-link.active {
    color: var(--ff-accent);
    background-color: var(--ff-accent-glow);
    font-weight: 500;
    border-left-color: var(--ff-accent);
    padding-left: 1rem;
}

/* Mobile Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100vw;
    height: calc(100vh - 64px);
    background: rgba(0, 0, 0, 0.5);
    z-index: 85;
}

/* Main Content Column */
.docs-content {
    margin-left: 280px;
    flex: 1;
    min-width: 0;
    padding: 2.5rem 2rem;
    display: flex;
    justify-content: center;
}

.content-wrapper {
    max-width: 820px;
    width: 100%;
}

/* Breadcrumbs navigation */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--ff-text-muted);
    margin-bottom: 1.5rem;
}

.breadcrumb-separator {
    color: var(--ff-border-subtle);
}

.breadcrumbs .active {
    color: var(--ff-accent);
    font-weight: 500;
}

/* Document Viewer & GFM Typography */
.document-viewer {
    background-color: var(--ff-card);
    border: 1px solid var(--ff-border);
    border-radius: var(--ff-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: var(--ff-transition);
}

.document-viewer:hover {
    border-color: rgba(16, 185, 129, 0.2);
}

.document-viewer h1 {
    font-family: var(--ff-font-title);
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--ff-text);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--ff-border);
    padding-bottom: 0.75rem;
    line-height: 1.25;
}

.document-viewer h2 {
    font-family: var(--ff-font-title);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--ff-text);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--ff-border-subtle);
    padding-bottom: 0.4rem;
}

.document-viewer h3 {
    font-family: var(--ff-font-title);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ff-text);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.document-viewer p {
    margin-bottom: 1.25rem;
    color: var(--ff-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Code and terminal output containers */
.document-viewer pre {
    background-color: var(--ff-code-bg);
    border: 1px solid var(--ff-border-subtle);
    border-radius: var(--ff-radius-sm);
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    position: relative;
}

.document-viewer code {
    font-family: var(--ff-font-mono);
    font-size: 0.85rem;
    color: var(--ff-accent);
}

.document-viewer pre code {
    color: var(--ff-text);
}

/* Dynamic Copy Button in pre code block */
.code-copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--ff-border-subtle);
    color: var(--ff-text-muted);
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--ff-transition);
}

.code-copy-btn:hover {
    color: var(--ff-accent);
    background: rgba(16, 185, 129, 0.08);
    border-color: var(--ff-accent);
}

/* Inline single backticks standard highlights */
.document-viewer p code, .document-viewer li code {
    background-color: var(--ff-code-bg);
    border: 1px solid var(--ff-border-subtle);
    border-radius: 4px;
    padding: 0.15rem 0.35rem;
    color: var(--ff-accent);
    font-weight: 500;
}

/* Lists typography */
.document-viewer ul, .document-viewer ol {
    margin-left: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--ff-text-muted);
}

.document-viewer li {
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

/* Modern tables layout */
.document-viewer table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.88rem;
}

.document-viewer th, .document-viewer td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--ff-border-subtle);
    text-align: left;
}

.document-viewer th {
    background-color: var(--ff-card);
    color: var(--ff-text);
    font-weight: 600;
}

.document-viewer td {
    color: var(--ff-text-muted);
}

.document-viewer tr:hover td {
    background-color: rgba(255, 255, 255, 0.005);
}

/* Premium alert templates (GitHub alerts match) */
.alert-box {
    border-left: 4px solid var(--ff-border);
    background-color: var(--ff-card);
    padding: 1rem 1.25rem;
    border-radius: 0 var(--ff-radius-sm) var(--ff-radius-sm) 0;
    margin-bottom: 1.5rem;
}

.alert-box-title {
    font-family: var(--ff-font-title);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.alert-box.important {
    border-left-color: var(--ff-accent);
    background-color: var(--ff-accent-glow);
}
.alert-box.important .alert-box-title {
    color: var(--ff-accent);
}

.alert-box.warning {
    border-left-color: #eab308;
    background-color: rgba(234, 179, 8, 0.05);
}
.alert-box.warning .alert-box-title {
    color: #eab308;
}

.alert-box.caution {
    border-left-color: var(--ff-danger);
    background-color: var(--ff-danger-bg);
}
.alert-box.caution .alert-box-title {
    color: var(--ff-danger);
}

/* Navigation footer selectors */
.content-footer {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    border-top: 1px solid var(--ff-border-subtle);
    padding-top: 2rem;
}

.nav-btn {
    flex: 1;
    background-color: var(--ff-card);
    border: 1px solid var(--ff-border);
    border-radius: var(--ff-radius);
    padding: 1.25rem 1.5rem;
    color: var(--ff-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: var(--ff-transition);
    text-align: left;
    outline: none;
}

.nav-btn.prev {
    justify-content: flex-start;
    text-align: left;
}

.nav-btn.next {
    justify-content: flex-end;
    text-align: right;
}

.nav-btn:hover {
    border-color: var(--ff-accent);
    color: var(--ff-text);
    box-shadow: 0 4px 20px var(--ff-accent-glow);
}

.nav-btn:hover svg {
    color: var(--ff-accent);
}

.nav-btn-meta {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.prev .nav-btn-meta {
    align-items: flex-start;
    text-align: left;
}

.next .nav-btn-meta {
    align-items: flex-end;
    text-align: right;
}

.nav-btn-meta span {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-btn-meta strong {
    font-family: var(--ff-font-title);
    font-size: 1rem;
    font-weight: 500;
    color: var(--ff-text);
}

.nav-btn svg {
    color: var(--ff-text-muted);
    transition: var(--ff-transition);
}

.nav-btn.prev svg {
    margin-right: 1rem;
}

.nav-btn.next svg {
    margin-left: 1rem;
}

/* Search Dynamic Highlights */
.search-highlight {
    background-color: rgba(234, 179, 8, 0.2);
    border-bottom: 2px solid #eab308;
    color: var(--ff-text);
    padding: 0 0.1rem;
    border-radius: 2px;
}

/* Embedded responsive graphics placeholder */
.docs-graphics {
    border: 1px solid var(--ff-border-subtle);
    border-radius: var(--ff-radius-sm);
    padding: 1.5rem;
    background: rgba(0,0,0,0.15);
    margin-bottom: 1.5rem;
    text-align: center;
}

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

    .docs-sidebar.active {
        transform: translateX(0);
    }

    .sidebar-overlay.active {
        display: block;
    }

    .docs-content {
        margin-left: 0;
        padding: 1.5rem 1rem;
    }

    .mobile-sidebar-toggle {
        display: block;
    }
}

@media (max-width: 600px) {
    #docs-search {
        width: 140px;
    }
    #docs-search:focus {
        width: 180px;
    }
    .header-version {
        display: none;
    }
    .header-divider {
        display: none;
    }
    .content-footer {
        flex-direction: column;
    }
    .document-viewer {
        padding: 1.5rem;
    }
}