/* Theme Variables & Definitions */
:root[data-theme="dark"] {
    --bg-primary: #07090e;
    --bg-sidebar: #0d1117;
    --bg-navbar: rgba(7, 9, 14, 0.8);
    --border-color: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(255, 255, 255, 0.1);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-cyan: #0ea5e9;
    --accent-purple: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #8b5cf6 100%);
    --accent-glow: rgba(14, 165, 233, 0.1);
    --code-bg: #090d13;
    --code-header-bg: #161b22;
    --code-text: #e6edf3;
    --table-header: #161b22;
    --table-zebra: #0d1117;
    --alert-note-bg: rgba(14, 165, 233, 0.06);
    --alert-note-border: #0ea5e9;
    --alert-warning-bg: rgba(245, 158, 11, 0.06);
    --alert-warning-border: #f59e0b;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

:root[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-sidebar: #ffffff;
    --bg-navbar: rgba(250, 250, 250, 0.8);
    --border-color: rgba(0, 0, 0, 0.04);
    --border-hover: rgba(0, 0, 0, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --accent-cyan: #0284c7;
    --accent-purple: #7c3aed;
    --accent-gradient: linear-gradient(135deg, #0284c7 0%, #7c3aed 100%);
    --accent-glow: rgba(2, 132, 199, 0.05);
    --code-bg: #f8fafc;
    --code-header-bg: #f4f4f5;
    --code-text: #24292f;
    --table-header: #f4f4f5;
    --table-zebra: #ffffff;
    --alert-note-bg: rgba(2, 132, 199, 0.04);
    --alert-note-border: #0284c7;
    --alert-warning-bg: rgba(217, 119, 6, 0.04);
    --alert-warning-border: #d97706;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
}

/* Constants */
:root {
    --sidebar-width: 280px;
    --navbar-height: 65px;
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    letter-spacing: -0.01em;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Top Navbar */
.docs-navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background-color: var(--bg-navbar);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

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

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.brand-logo {
    height: 34px;
    width: 34px;
    border-radius: 8px;
}

.brand-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* Navbar Search */
.nav-search-wrapper {
    position: relative;
    max-width: 420px;
    width: 100%;
    margin: 0 2rem;
}

.search-icon {
    position: absolute;
    left: 0.95rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

#docs-search-input {
    width: 100%;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem 0.5rem 2.2rem;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    font-family: inherit;
}

#docs-search-input:focus {
    outline: none;
    border-color: var(--border-hover);
    background-color: var(--bg-sidebar);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.nav-back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.nav-back-link:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background-color: var(--bg-secondary);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

/* Docs Layout */
.docs-layout {
    display: flex;
    padding-top: var(--navbar-height);
    min-height: 100vh;
}

/* Sidebar Navigation */
.docs-sidebar {
    width: var(--sidebar-width);
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    bottom: 0;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 2rem 1.5rem;
    z-index: 900;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.nav-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.group-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
}

.group-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.45rem 0.75rem;
    border-radius: 6px;
    border-left: 2px solid transparent;
    transition: all 0.15s ease;
}

.sidebar-link i {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: color 0.15s ease;
}

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

.sidebar-link.active {
    color: var(--text-primary);
    background-color: var(--border-color);
    font-weight: 600;
}

.sidebar-link.active i {
    color: var(--text-primary);
}

/* Main Content Area */
.docs-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 3rem 4rem 6rem;
    max-width: 960px;
}

/* Sections visibility toggle in single page mode */
.content-section {
    display: none;
}

.content-section.active-section {
    display: block;
    animation: fadeInContent 0.25s ease-out;
}

@keyframes fadeInContent {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Section Header Typography */
.page-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.lead-text {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.docs-content h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 750;
    margin: 3.5rem 0 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.docs-content h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.75rem 0 0.8rem;
}

.docs-content p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.docs-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.docs-content li {
    margin-bottom: 0.5rem;
}

.docs-content li strong {
    color: var(--text-primary);
}

/* Config option tables */
.options-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0 2rem;
    font-size: 0.9rem;
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
}

.options-table th, .options-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.options-table th {
    background-color: var(--table-header);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--text-primary);
}

.options-table tr {
    background-color: var(--bg-secondary);
    transition: background-color 0.2s ease;
}

.options-table tr:nth-child(even) {
    background-color: var(--table-zebra);
}

.options-table tr:hover {
    background-color: var(--border-color);
}

.options-table code {
    font-family: 'Fira Code', monospace;
    font-size: 0.82rem;
    background-color: var(--bg-tertiary);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    color: var(--accent-cyan);
}

/* Custom Alert Callouts */
.alert {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: 8px;
    margin: 1.5rem 0 2rem;
    border-left: 4px solid transparent;
}

.alert-note {
    background-color: var(--alert-note-bg);
    border-left-color: var(--alert-note-border);
}

.alert-note .alert-icon {
    color: var(--alert-note-border);
}

.alert-warning {
    background-color: var(--alert-warning-bg);
    border-left-color: var(--alert-warning-border);
}

.alert-warning .alert-icon {
    color: var(--alert-warning-border);
}

.alert-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.alert-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.alert-content code {
    background-color: rgba(0, 0, 0, 0.15);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

:root[data-theme="light"] .alert-content code {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Code Syntax Styling */
.code-container {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin: 1.5rem 0 2rem;
    box-shadow: var(--shadow);
}

.code-header {
    background-color: var(--code-header-bg);
    padding: 0.65rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.code-filename {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    color: var(--text-primary);
    background-color: var(--border-color);
}

.code-container pre {
    padding: 1.25rem;
    margin: 0;
    overflow-x: auto;
}

.code-container code {
    font-family: 'Fira Code', 'Courier New', Courier, monospace;
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--code-text);
}

/* YAML syntax highlights simulator */
.language-yaml {
    color: var(--text-secondary);
}

/* Developer Mode Cards Grid */
.modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin: 1.5rem 0 2rem;
}

.mode-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.mode-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.8rem;
}

.mode-card-header i {
    font-size: 1.25rem;
}

.mode-card-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    margin: 0;
}

.host-header i { color: #f59e0b; }
.guest-header i { color: #10b981; }
.public-header i { color: #3b82f6; }

.mode-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Developer Protocol flow diagram visual */
.flow-diagram-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 2rem 0;
    gap: 0.5rem;
}

.diagram-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 450px;
}

.step-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.9rem 1.5rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    width: 100%;
    box-shadow: var(--shadow);
    font-size: 0.9rem;
}

.step-box small {
    display: block;
    margin-top: 0.25rem;
    font-family: 'Fira Code', monospace;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.step-arrow {
    padding: 0.6rem 0;
    font-size: 1.1rem;
    color: var(--accent-cyan);
}

/* Mobile responsive menu */
@media(max-width: 992px) {
    .docs-content {
        padding: 2.5rem 2.5rem 5rem;
    }
}

@media(max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }

    .sidebar-toggle {
        display: block;
    }

    .nav-search-wrapper {
        margin: 0 0.5rem;
    }

    .nav-actions .nav-back-link span {
        display: none; /* Hide label text on mobile back button */
    }
    
    .nav-actions .nav-back-link {
        padding: 0.4rem;
    }

    .docs-sidebar {
        left: -100%;
        width: 100%;
        max-width: 320px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .docs-sidebar.active {
        left: 0;
    }

    .docs-content {
        margin-left: 0;
        padding: 2rem 1.5rem 4rem;
    }

    .page-title {
        font-size: 2.25rem;
    }

    .docs-content h2 {
        font-size: 1.5rem;
    }

    .modes-grid {
        grid-template-columns: 1fr;
    }
}

/* Page Navigation Footer */
.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    gap: 1.5rem;
    flex-wrap: wrap;
}

.page-nav-card {
    flex: 1;
    min-width: 200px;
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.25s ease, box-shadow 0.25s ease;
    cursor: pointer;
}

.page-nav-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow);
}

.page-nav-card.prev-card {
    align-items: flex-start;
}

.page-nav-card.next-card {
    align-items: flex-end;
    text-align: right;
}

.nav-card-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.nav-card-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.page-nav-card:hover .nav-card-title {
    color: var(--accent-cyan);
}