/**
 * @component jOpenSim Social Layout
 * @copyright Copyright (C) 2024-2026 Druskus ZoneNations https://www.jopensim.com/
 * @license GNU/GPL v2 http://www.gnu.org/licenses/gpl-2.0.html
 * @description Facebook-style layout with fixed sidebars, topbar and scrollable content
 */

/* ==========================================
   CSS VARIABLES - LIQUID GLASS THEME SYSTEM
   ========================================== */

:root {
    /* ── Dark Theme (Default) ── Unified midnight navy chrome ── */
    --zn-chrome-bg: #181926;
    --zn-bg-primary: #181926;
    --zn-bg-secondary: #1e2030;
    --zn-bg-tertiary: #252838;
    --zn-bg-hover: rgba(255, 255, 255, 0.08);
    --zn-bg-active: rgba(255, 255, 255, 0.12);
    --zn-bg-card: #1e2030;
    --zn-bg-input: #252838;

    --zn-text-primary: rgba(255, 255, 255, 0.92);
    --zn-text-secondary: rgba(255, 255, 255, 0.60);
    --zn-text-tertiary: rgba(255, 255, 255, 0.35);
    --zn-text-link: #7aafff;
    --zn-text-link-hover: #a8ccff;

    --zn-border-color: rgba(255, 255, 255, 0.10);
    --zn-border-light: rgba(255, 255, 255, 0.06);

    /* Accent colors */
    --zn-accent-primary: #ff7043;
    --zn-accent-secondary: #ffab91;
    --zn-accent-gradient: linear-gradient(135deg, #ff7043 0%, #ffab91 100%);

    /* Semantic colors */
    --zn-success: #6ee7b7;
    --zn-warning: #fcd34d;
    --zn-error: #fb7185;
    --zn-info: #7dd3fc;
    --zn-online: #6ee7b7;

    /* Purple for Fediverse */
    --zn-fediverse: #c4b5fd;

    /* Orange for ZoneVerse */
    --zn-zoneverse: #fdba74;

    /* ── Liquid Glass tokens ── */
    --zn-glass-blur: 24px;
    --zn-glass-saturation: 180%;
    --zn-glass-bg: rgba(255, 255, 255, 0.04);
    --zn-glass-bg-heavy: rgba(255, 255, 255, 0.07);
    --zn-glass-border: rgba(255, 255, 255, 0.12);
    --zn-glass-border-bright: rgba(255, 255, 255, 0.20);
    --zn-glass-highlight: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.02) 50%, transparent 100%);
    --zn-glass-inner-shadow: inset 0 1px 0 rgba(255,255,255,0.10), inset 0 -1px 0 rgba(0,0,0,0.15);
    --zn-glass-specular: radial-gradient(ellipse at 30% 0%, rgba(255,255,255,0.15) 0%, transparent 60%);
    --zn-ambient-gradient: radial-gradient(ellipse at 20% 50%, rgba(72, 82, 140, 0.10) 0%, transparent 50%),
                           radial-gradient(ellipse at 80% 80%, rgba(72, 82, 140, 0.06) 0%, transparent 50%);

    /* Shadows - depth layers */
    --zn-shadow-sm: 0 2px 8px rgba(0,0,0,0.25), 0 0 1px rgba(255,255,255,0.10);
    --zn-shadow-md: 0 4px 16px rgba(0,0,0,0.35), 0 0 1px rgba(255,255,255,0.10);
    --zn-shadow-lg: 0 12px 40px rgba(0,0,0,0.45), 0 0 1px rgba(255,255,255,0.10);

    /* Layout */
    --zn-topbar-height: 56px;
    --zn-sidebar-width: 280px;
    --zn-sidebar-width-collapsed: 72px;
    --zn-content-max-width: 680px;
    --zn-border-radius: 14px;
    --zn-border-radius-lg: 20px;
    --zn-transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);

    /* Z-index layers */
    --zn-z-sidebar: 100;
    --zn-z-topbar: 200;
    --zn-z-dropdown: 300;
    --zn-z-modal: 400;
    --zn-z-tooltip: 500;
}

/* ── Light Theme ── Liquid Glass on bright canvas ── */
[data-theme="light"] {
    --zn-chrome-bg: #f3f4f8;
    --zn-bg-primary: #f3f4f8;
    --zn-bg-secondary: #ffffff;
    --zn-bg-tertiary: #e8ebf2;
    --zn-bg-hover: rgba(15, 23, 42, 0.05);
    --zn-bg-active: rgba(15, 23, 42, 0.08);
    --zn-bg-card: #ffffff;
    --zn-bg-input: #ffffff;

    --zn-text-primary: #0f172a;
    --zn-text-secondary: #475569;
    --zn-text-tertiary: #64748b;
    --zn-text-link: #2563eb;
    --zn-text-link-hover: #1d4ed8;

    --zn-border-color: rgba(15, 23, 42, 0.10);
    --zn-border-light: rgba(15, 23, 42, 0.06);

    /* Readable light glass (avoid washed-out translucent panels) */
    --zn-glass-blur: 18px;
    --zn-glass-saturation: 140%;
    --zn-glass-bg: rgba(255, 255, 255, 0.88);
    --zn-glass-bg-heavy: #ffffff;
    --zn-glass-border: rgba(15, 23, 42, 0.10);
    --zn-glass-border-bright: rgba(15, 23, 42, 0.16);
    --zn-glass-highlight: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.4) 55%, transparent 100%);
    --zn-glass-inner-shadow: inset 0 1px 0 rgba(255,255,255,0.95), inset 0 -1px 0 rgba(15,23,42,0.04);
    --zn-glass-specular: radial-gradient(ellipse at 30% 0%, rgba(255,255,255,0.8) 0%, transparent 60%);
    --zn-ambient-gradient: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.05) 0%, transparent 50%),
                           radial-gradient(ellipse at 80% 80%, rgba(244,114,182,0.04) 0%, transparent 50%);

    --zn-shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
    --zn-shadow-md: 0 4px 14px rgba(15,23,42,0.08), 0 1px 3px rgba(15,23,42,0.05);
    --zn-shadow-lg: 0 12px 32px rgba(15,23,42,0.10), 0 2px 6px rgba(15,23,42,0.05);
}

/* ==========================================
   RESET & BASE
   ========================================== */

.zn-social-layout,
.zn-social-layout * {
    box-sizing: border-box;
}

.zn-social-layout {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 15px;
    line-height: 1.34;
    color: var(--zn-text-primary);
    background: var(--zn-chrome-bg);
    min-height: 100vh;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Hide Joomla default elements */
body.zn-social-active {
    overflow: hidden;
    margin: 0;
    padding: 0;
}

body.zn-social-active #header,
body.zn-social-active .navbar,
body.zn-social-active #footer,
body.zn-social-active footer,
body.zn-social-active .container-component > .container {
    display: none !important;
}

/* ==========================================
   MAIN LAYOUT STRUCTURE
   ========================================== */

.zn-social-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.zn-layout-wrapper {
    display: flex;
    flex: 1;
    overflow: hidden;
    padding-top: var(--zn-topbar-height);
}

/* ==========================================
   TOPBAR
   ========================================== */

.zn-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--zn-topbar-height);
    background: var(--zn-chrome-bg);
    border-bottom: none;
    box-shadow: none;
    display: flex;
    align-items: center;
    padding: 0 16px;
    z-index: var(--zn-z-topbar);
}

.zn-topbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 200px;
}

.zn-topbar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--zn-accent-primary);
    font-size: 24px;
    font-weight: 700;
}

.zn-topbar-logo img {
    width: auto;
    height: 36px;
    border-radius: 4px;
}

.zn-topbar-logo-text {
    font-size: 20px;
    background: var(--zn-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.zn-topbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 680px;
    margin: 0 auto;
}

.zn-search-box {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.zn-search-input {
    width: 100%;
    height: 40px;
    padding: 0 16px 0 44px;
    background: var(--zn-glass-bg);
    border: 1px solid var(--zn-glass-border);
    border-radius: 20px;
    color: var(--zn-text-primary);
    font-size: 15px;
    transition: var(--zn-transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.zn-search-input::placeholder {
    color: var(--zn-text-tertiary);
}

.zn-search-input:focus {
    outline: none;
    background: var(--zn-glass-bg-heavy);
    border-color: var(--zn-accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 112, 67, 0.15), var(--zn-glass-inner-shadow);
}

.zn-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--zn-text-tertiary);
    pointer-events: none;
    font-size: 16px;
}

.zn-topbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 200px;
    justify-content: flex-end;
}

.zn-topbar-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--zn-glass-bg);
    border: 1px solid var(--zn-glass-border);
    color: var(--zn-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--zn-transition);
    box-shadow: var(--zn-glass-inner-shadow);
    text-decoration: none;
}

.zn-topbar-btn:hover {
    background: var(--zn-glass-bg-heavy);
    border-color: var(--zn-glass-border-bright);
    transform: translateY(-1px);
    box-shadow: var(--zn-glass-inner-shadow), var(--zn-shadow-sm);
}

.zn-topbar-btn svg {
    width: 20px;
    height: 20px;
}

.zn-topbar-btn i {
    font-size: 18px;
    line-height: 1;
}

/* Profile avatar in topbar — never show broken alt text */
.zn-topbar-avatar {
    padding: 0 !important;
    overflow: hidden;
    flex-shrink: 0;
}
.zn-topbar-avatar img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    background: var(--zn-bg-tertiary);
}

/* Language switcher (custom menu — night/day safe) */
.zn-lang-switch {
    position: relative;
}
.zn-lang-btn {
    height: 40px;
    min-width: 88px;
    max-width: 180px;
    padding: 0 12px;
    border-radius: 20px;
    background: var(--zn-glass-bg, rgba(255,255,255,0.08));
    border: 1px solid var(--zn-glass-border, rgba(255,255,255,0.14));
    color: var(--zn-text-primary, #e6edf3);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}
.zn-lang-btn:hover {
    background: var(--zn-glass-bg-heavy, rgba(255,255,255,0.12));
    border-color: var(--zn-glass-border-bright, rgba(255,255,255,0.28));
}
.zn-lang-btn:focus {
    outline: 2px solid var(--zn-accent-primary, #f7931a);
    outline-offset: 1px;
}
.zn-lang-btn i {
    font-size: 10px;
    opacity: 0.75;
}
.zn-lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    max-width: min(320px, 90vw);
    max-height: 70vh;
    overflow: auto;
    padding: 6px;
    border-radius: 12px;
    z-index: 100060;
    background: #1a1f27;
    border: 1px solid rgba(255,255,255,0.14);
    box-shadow: 0 16px 40px rgba(0,0,0,0.55);
}
.zn-lang-menu[hidden] {
    display: none !important;
}
.zn-lang-option {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: #e6edf3 !important;
    text-decoration: none !important;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
}
.zn-lang-option:hover,
.zn-lang-option.is-active {
    background: rgba(247,147,26,0.18);
    color: #fff !important;
}
[data-theme="day"] .zn-lang-btn,
[data-theme="light"] .zn-lang-btn {
    color: var(--zn-text-primary, #1c2128);
    background: var(--zn-glass-bg, #fff);
}
[data-theme="day"] .zn-lang-menu,
[data-theme="light"] .zn-lang-menu {
    background: #ffffff;
    border-color: rgba(0,0,0,0.12);
    box-shadow: 0 12px 28px rgba(0,0,0,0.18);
}
[data-theme="day"] .zn-lang-option,
[data-theme="light"] .zn-lang-option {
    color: #1c2128 !important;
}
[data-theme="day"] .zn-lang-option:hover,
[data-theme="day"] .zn-lang-option.is-active,
[data-theme="light"] .zn-lang-option:hover,
[data-theme="light"] .zn-lang-option.is-active {
    background: rgba(247,147,26,0.14);
    color: #1c2128 !important;
}

.zn-topbar-badge {
    position: absolute;
    top: -3px;
    right: -3px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: linear-gradient(135deg, #ff4757 0%, #e41e3f 100%);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(228, 30, 63, 0.5), inset 0 1px 0 rgba(255,255,255,0.25);
    animation: badge-pulse 2s ease-in-out infinite;
    border: 1.5px solid var(--zn-bg-primary);
}

.zn-topbar-badge.no-animation {
    animation: none;
}

@keyframes badge-pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(228, 30, 63, 0.4);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 4px 16px rgba(228, 30, 63, 0.6);
    }
}

@keyframes badge-bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-6px);
    }
    60% {
        transform: translateY(-3px);
    }
}

.zn-topbar-badge.new-notification {
    animation: badge-bounce 0.6s ease-out, badge-pulse 2s ease-in-out infinite 0.6s;
}

/* Topbar Dropdown Styles */
.zn-topbar-dropdown {
    position: relative;
}

.zn-dropdown-content {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 360px;
    max-height: 480px;
    background: var(--zn-glass-bg-heavy);
    backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    border-radius: var(--zn-border-radius-lg);
    box-shadow: var(--zn-shadow-lg), var(--zn-glass-inner-shadow);
    border: 1px solid var(--zn-glass-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.97);
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.zn-dropdown-content::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--zn-glass-specular);
    pointer-events: none;
    z-index: 0;
}

.zn-dropdown-content.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.zn-dropdown-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--zn-glass-border);
    font-weight: 600;
    font-size: 16px;
    color: var(--zn-text-primary);
    position: relative;
    z-index: 1;
}

.zn-dropdown-settings {
    background: transparent;
    border: none;
    color: var(--zn-text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.zn-dropdown-settings:hover {
    background: var(--zn-bg-tertiary);
    color: var(--zn-accent-primary);
}

.zn-dropdown-list {
    flex: 1;
    overflow-y: auto;
    max-height: 360px;
    position: relative;
    z-index: 1;
}

.zn-dropdown-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.zn-spinner-small {
    width: 24px;
    height: 24px;
    border: 2px solid var(--zn-border-color);
    border-top-color: var(--zn-accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.zn-dropdown-item {
    display: flex;
    align-items: flex-start;
    padding: 12px 16px;
    gap: 12px;
    cursor: pointer;
    transition: background 0.2s ease;
    border-bottom: 1px solid var(--zn-glass-border);
    position: relative;
    z-index: 1;
}

.zn-dropdown-item:last-child {
    border-bottom: none;
}

.zn-dropdown-item:hover {
    background: var(--zn-glass-bg-heavy);
}

.zn-dropdown-item.unread {
    background: rgba(var(--zn-accent-primary-rgb, 59, 130, 246), 0.1);
}

.zn-dropdown-item.unread:hover {
    background: rgba(var(--zn-accent-primary-rgb, 59, 130, 246), 0.15);
}

.zn-dropdown-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.zn-dropdown-avatar-placeholder {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--zn-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.zn-dropdown-avatar-placeholder svg {
    width: 24px;
    height: 24px;
    fill: var(--zn-text-tertiary);
}

.zn-dropdown-item-content {
    flex: 1;
    min-width: 0;
}

.zn-dropdown-item-title {
    font-weight: 500;
    color: var(--zn-text-primary);
    font-size: 14px;
    margin-bottom: 2px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.zn-dropdown-item-preview {
    font-size: 13px;
    color: var(--zn-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.zn-dropdown-item-time {
    font-size: 11px;
    color: var(--zn-text-tertiary);
    margin-top: 4px;
}

.zn-dropdown-item-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.zn-dropdown-item-icon.notification-like {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.zn-dropdown-item-icon.notification-comment {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.zn-dropdown-item-icon.notification-friend {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.zn-dropdown-item-icon.notification-system {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

.zn-dropdown-item-icon.notification-default {
    background: var(--zn-bg-tertiary);
    color: var(--zn-text-secondary);
}

.zn-dropdown-empty {
    padding: 40px 20px;
    text-align: center;
    color: var(--zn-text-tertiary);
}

.zn-dropdown-empty svg {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

.zn-dropdown-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 12px 16px;
    border-top: 1px solid var(--zn-glass-border);
    background: var(--zn-glass-bg);
    position: relative;
    z-index: 1;
}

.zn-dropdown-footer a {
    color: var(--zn-accent-primary);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.zn-dropdown-footer a:hover {
    opacity: 0.8;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .zn-dropdown-content {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 70vh;
        border-radius: var(--zn-border-radius-lg) var(--zn-border-radius-lg) 0 0;
        transform: translateY(100%) scale(1);
        background: var(--zn-glass-bg-heavy);
        backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
        -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    }
    
    .zn-dropdown-content.active {
        transform: translateY(0) scale(1);
    }
}

.zn-theme-toggle {
    background: transparent;
    border-color: transparent;
}

.zn-theme-toggle i {
    transition: transform 0.3s ease;
}

.zn-theme-toggle:hover i {
    transform: rotate(30deg);
}

.zn-theme-toggle:hover {
    background: var(--zn-glass-bg);
    border-color: var(--zn-glass-border);
}

/* ==========================================
   SIDEBAR LEFT
   ========================================== */

.zn-sidebar-left {
    position: fixed;
    top: var(--zn-topbar-height);
    left: 0;
    width: var(--zn-sidebar-width);
    height: calc(100vh - var(--zn-topbar-height));
    background: var(--zn-chrome-bg);
    border-right: none;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: var(--zn-z-sidebar);
    padding: 12px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.zn-sidebar-left::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

/* User Profile Card in Sidebar - Enhanced with Cover */
.zn-sidebar-profile {
    background: var(--zn-glass-bg);
    border-radius: var(--zn-border-radius-lg);
    margin-bottom: 12px;
    text-align: center;
    border: 1px solid var(--zn-glass-border);
    overflow: hidden;
    position: relative;
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-sidebar-profile::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--zn-glass-specular);
    pointer-events: none;
    z-index: 0;
}

/* Cover Image Background */
.zn-sidebar-cover {
    width: 100%;
    height: 120px;
    background: linear-gradient(135deg, var(--zn-accent-primary) 0%, var(--zn-accent-secondary) 100%);
    background-size: cover;
    background-position: center;
    position: relative;
}

.zn-sidebar-cover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, var(--zn-bg-card) 0%, transparent 100%);
}

.zn-sidebar-profile-content {
    padding: 0 16px 16px;
    margin-top: -65px;
    position: relative;
    z-index: 1;
}

.zn-sidebar-avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    margin: 0 auto 12px;
    border: 4px solid var(--zn-glass-border-bright);
    box-shadow: var(--zn-shadow-md), 0 0 24px rgba(255,112,67,0.2);
    object-fit: cover;
    background: var(--zn-bg-tertiary);
    position: relative;
    z-index: 1;
    display: block;
}

.zn-sidebar-avatar-wrap,
.zn-sidebar-cover-wrap {
    position: relative;
}
.zn-sidebar-avatar-wrap {
    display: inline-block;
    margin: 0 auto 12px;
}
.zn-sidebar-avatar-wrap .zn-sidebar-avatar {
    margin: 0;
}
.zn-sidebar-media-edit {
    position: absolute;
    z-index: 3;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid var(--zn-bg-card);
    background: var(--zn-accent-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--zn-shadow-sm);
    transition: transform 0.15s ease, filter 0.15s ease;
}
.zn-sidebar-media-edit:hover {
    transform: scale(1.06);
    filter: brightness(1.08);
}
.zn-sidebar-media-edit i {
    font-size: 14px;
    line-height: 1;
}
.zn-sidebar-cover-wrap .zn-sidebar-media-edit {
    top: 10px;
    right: 10px;
}
.zn-sidebar-avatar-wrap .zn-sidebar-media-edit {
    bottom: 6px;
    right: 6px;
}
[data-theme="light"] .zn-sidebar-cover::after {
    background: linear-gradient(to top, var(--zn-bg-card) 0%, transparent 100%);
}
[data-theme="light"] .zn-sidebar-avatar {
    border-color: #fff;
    box-shadow: var(--zn-shadow-md);
}
[data-theme="light"] .zn-sidebar-profile,
[data-theme="light"] .zn-widget,
[data-theme="light"] .zn-nav-section {
    background: #ffffff;
    border-color: rgba(15, 23, 42, 0.10);
    box-shadow: var(--zn-shadow-sm);
}
[data-theme="light"] .zn-sidebar-left,
[data-theme="light"] .zn-sidebar-right,
[data-theme="light"] .zn-topbar,
[data-theme="light"] .zn-main-content,
[data-theme="light"] .zn-social-layout,
[data-theme="light"] body {
    background: var(--zn-chrome-bg) !important;
    color: var(--zn-text-primary);
}
[data-theme="light"] .zn-topbar-btn {
    color: var(--zn-text-primary);
    background: rgba(15, 23, 42, 0.04);
    border-color: rgba(15, 23, 42, 0.10);
}
[data-theme="light"] .zn-topbar-btn:hover {
    background: rgba(15, 23, 42, 0.08);
}
[data-theme="light"] .zn-search-input {
    background: #ffffff;
    color: var(--zn-text-primary);
    border-color: rgba(15, 23, 42, 0.10);
}
[data-theme="light"] .zn-nav-item {
    color: var(--zn-text-primary);
}
[data-theme="light"] .zn-nav-section-title,
[data-theme="light"] .zn-widget-title,
[data-theme="light"] .zn-sidebar-username {
    color: var(--zn-text-primary);
}
[data-theme="light"] .zn-sidebar-handle,
[data-theme="light"] .zn-sidebar-stat-label,
[data-theme="light"] .zn-nav-item-text {
    color: var(--zn-text-secondary);
}

/* Keep cover camera on the cover strip, not over the avatar */
.zn-sidebar-cover-wrap {
    position: relative;
    z-index: 0;
}
.zn-sidebar-cover-wrap .zn-sidebar-media-edit {
    top: 8px;
    right: 8px;
    bottom: auto;
}
.zn-sidebar-avatar-wrap {
    position: relative;
    z-index: 2;
}
.zn-sidebar-avatar-wrap .zn-sidebar-media-edit {
    bottom: 8px;
    right: 8px;
    top: auto;
}

.zn-sidebar-username {
    font-size: 16px;
    font-weight: 600;
    color: var(--zn-text-primary);
    margin-bottom: 4px;
}

.zn-sidebar-handle {
    font-size: 13px;
    color: var(--zn-text-secondary);
    margin-bottom: 12px;
}

.zn-sidebar-stats {
    display: flex;
    justify-content: space-around;
    padding-top: 12px;
    border-top: 1px solid var(--zn-border-color);
}

.zn-sidebar-stat {
    text-align: center;
}

.zn-sidebar-stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--zn-text-primary);
}

.zn-sidebar-stat-label {
    font-size: 11px;
    color: var(--zn-text-tertiary);
    text-transform: uppercase;
}

/* Navigation Menu */
.zn-nav-section {
    margin-bottom: 8px;
}

.zn-nav-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--zn-text-tertiary);
    text-transform: uppercase;
    padding: 12px 12px 8px;
    letter-spacing: 0.5px;
}

.zn-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--zn-border-radius);
    color: var(--zn-text-primary);
    text-decoration: none;
    transition: var(--zn-transition);
    cursor: pointer;
    position: relative;
}

.zn-nav-item:hover {
    background: var(--zn-glass-bg-heavy);
    border-color: transparent;
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-nav-item.active {
    background: var(--zn-accent-gradient);
    color: white;
    box-shadow: 0 4px 16px rgba(255,112,67,0.3), var(--zn-glass-inner-shadow);
}

.zn-nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.zn-nav-item-text {
    flex: 1;
    font-size: 15px;
    font-weight: 500;
}

.zn-nav-badge {
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--zn-error);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================
   SIDEBAR RIGHT
   ========================================== */

.zn-sidebar-right {
    position: fixed;
    top: var(--zn-topbar-height);
    right: 0;
    width: var(--zn-sidebar-width);
    height: calc(100vh - var(--zn-topbar-height));
    background: var(--zn-chrome-bg);
    border-left: none;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: var(--zn-z-sidebar);
    padding: 16px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.zn-sidebar-right::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

/* ==========================================
   GUEST MODE — No sidebars, full-width content
   ========================================== */
.zn-guest-mode .zn-sidebar-left,
.zn-guest-mode .zn-sidebar-right {
    display: none !important;
    visibility: hidden !important;
    width: 0 !important;
    overflow: hidden !important;
}
.zn-guest-mode .zn-main-content {
    margin-left: 0 !important;
    margin-right: 0 !important;
    max-width: 100% !important;
}
.zn-guest-mode .zn-content-inner {
    max-width: 900px;
    margin: 0 auto;
}
.zn-guest-mode .zn-sidebar-right .zn-widget[class*="search"],
.zn-guest-mode .zn-sidebar-right .zn-widget:has(.zn-search-box),
.zn-guest-mode .zn-sidebar-right .zn-widget:has([href*="inworldsearch"]),
.zn-guest-mode .zn-sidebar-right .zn-widget:has([href*="view=search"]) {
    display: none !important;
}

/* Widgets */
.zn-widget {
    background: var(--zn-glass-bg);
    border-radius: var(--zn-border-radius-lg);
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--zn-glass-border);
    box-shadow: var(--zn-glass-inner-shadow);
    position: relative;
    overflow: hidden;
}

.zn-widget::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--zn-glass-specular);
    pointer-events: none;
    z-index: 0;
}

.zn-widget-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--zn-text-primary);
    margin-bottom: 16px;
}

.zn-widget-title svg {
    width: 18px;
    height: 18px;
    color: var(--zn-accent-primary);
}

/* Stats Widget */
.zn-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.zn-stat-item {
    text-align: center;
    padding: 12px 8px;
    background: var(--zn-glass-bg);
    border-radius: var(--zn-border-radius);
    border: 1px solid var(--zn-glass-border);
    box-shadow: var(--zn-glass-inner-shadow);
    position: relative;
    z-index: 1;
}

.zn-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--zn-text-primary);
}

.zn-stat-label {
    font-size: 11px;
    color: var(--zn-text-tertiary);
    margin-top: 4px;
}

/* Friend Requests Widget */
.zn-friend-request {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--zn-border-color);
}

.zn-friend-request:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.zn-friend-request-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.zn-friend-request-info {
    flex: 1;
}

.zn-friend-request-name {
    font-weight: 600;
    color: var(--zn-text-primary);
    font-size: 14px;
}

.zn-friend-request-mutual {
    font-size: 12px;
    color: var(--zn-text-secondary);
}

.zn-friend-request-actions {
    display: flex;
    gap: 8px;
}

.zn-btn-accept {
    padding: 6px 14px;
    background: var(--zn-accent-gradient);
    color: white;
    border: none;
    border-radius: var(--zn-border-radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--zn-transition);
    box-shadow: 0 2px 8px rgba(255,112,67,0.25), inset 0 1px 0 rgba(255,255,255,0.20);
}

.zn-btn-accept:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255,112,67,0.35), inset 0 1px 0 rgba(255,255,255,0.25);
}

.zn-btn-decline {
    padding: 6px 14px;
    background: var(--zn-glass-bg-heavy);
    color: var(--zn-text-primary);
    border: 1px solid var(--zn-glass-border);
    border-radius: var(--zn-border-radius);
    font-size: 13px;
    cursor: pointer;
    transition: var(--zn-transition);
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-btn-decline:hover {
    background: var(--zn-bg-hover);
    border-color: var(--zn-glass-border-bright);
    transform: translateY(-1px);
}

/* Online Friends Widget */
.zn-online-friend {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    cursor: pointer;
    transition: var(--zn-transition);
}

.zn-online-friend:hover {
    background: var(--zn-bg-hover);
    margin: 0 -12px;
    padding: 8px 12px;
    border-radius: var(--zn-border-radius);
}

.zn-online-avatar-wrapper {
    position: relative;
}

.zn-online-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.zn-online-indicator {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 12px;
    height: 12px;
    background: var(--zn-online);
    border: 2px solid var(--zn-bg-card);
    border-radius: 50%;
}

.zn-online-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--zn-text-primary);
}

.zn-empty-state {
    text-align: center;
    padding: 20px;
    color: var(--zn-text-secondary);
}

.zn-empty-state svg {
    width: 48px;
    height: 48px;
    color: var(--zn-text-tertiary);
    margin-bottom: 12px;
}

.zn-empty-state-text {
    font-size: 14px;
}

/* ==========================================
   MAIN CONTENT
   ========================================== */

.zn-main-content {
    position: fixed;
    top: var(--zn-topbar-height);
    left: var(--zn-sidebar-width);
    right: var(--zn-sidebar-width);
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
    background: transparent;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.zn-main-content::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

.zn-content-inner {
    width: 100%;
    max-width: 100%;
    padding: 10px;
    min-height: 100%;
    box-sizing: border-box;
}

/* ==========================================
   MOBILE RESPONSIVE
   ========================================== */

/* Mobile Menu Button */
.zn-mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--zn-glass-bg);
    border: 1px solid var(--zn-glass-border);
    color: var(--zn-text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-mobile-overlay {
    display: none;
    position: fixed;
    top: var(--zn-topbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--zn-z-sidebar) - 1);
}

/* Tablet */
@media (max-width: 1200px) {
    :root {
        --zn-sidebar-width: 260px;
    }
    
    .zn-sidebar-right {
        width: 260px;
    }
    
    .zn-sidebar-left {
        width: 260px;
    }
    
    .zn-main-content {
        left: 260px;
        right: 260px;
    }
}

/* Mobile */
@media (max-width: 900px) {
    .zn-mobile-menu-btn {
        display: flex;
    }
    
    .zn-topbar-logo-text {
        display: none;
    }
    
    .zn-sidebar-left {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .zn-sidebar-left.open {
        transform: translateX(0);
    }
    
    .zn-sidebar-right {
        display: none;
    }
    
    .zn-main-content {
        left: 0;
        right: 0;
    }
    
    .zn-mobile-overlay.show {
        display: block;
    }
}

/* Small Mobile */
@media (max-width: 600px) {
    .zn-topbar {
        padding: 0 8px;
    }
    
    .zn-topbar-left {
        min-width: auto;
    }
    
    .zn-topbar-right {
        min-width: auto;
        gap: 4px;
    }
    
    .zn-topbar-btn {
        width: 36px;
        height: 36px;
    }
    
    .zn-search-box {
        max-width: 100%;
    }
    
    .zn-sidebar-left {
        width: 100%;
    }
}

/* ==========================================
   MOBILE BOTTOM NAVIGATION
   ========================================== */

.zn-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--zn-glass-bg-heavy);
    backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    border-top: 1px solid var(--zn-glass-border);
    z-index: var(--zn-z-topbar);
    box-shadow: 0 -2px 16px rgba(0,0,0,0.15), var(--zn-glass-inner-shadow);
}

@media (max-width: 900px) {
    .zn-bottom-nav {
        display: flex;
        align-items: center;
        justify-content: space-around;
    }
    
    .zn-main-content {
        bottom: 56px;
    }
}

.zn-bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--zn-text-secondary);
    text-decoration: none;
    transition: var(--zn-transition);
    position: relative;
    background: transparent;
    border: 0;
    cursor: pointer;
    font: inherit;
    -webkit-tap-highlight-color: transparent;
}

.zn-bottom-nav-item:hover,
.zn-bottom-nav-item.active {
    color: var(--zn-accent-primary);
}

.zn-bottom-nav-item.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: var(--zn-accent-primary);
    border-radius: 0 0 3px 3px;
}

.zn-bottom-nav-item svg {
    width: 24px;
    height: 24px;
}

.zn-bottom-nav-badge {
    position: absolute;
    top: 4px;
    right: calc(50% - 18px);
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    background: var(--zn-error);
    color: white;
    font-size: 10px;
    font-weight: 600;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.zn-animate-fade {
    animation: fadeIn 0.3s ease;
}

.zn-animate-slide-left {
    animation: slideInLeft 0.3s ease;
}

.zn-animate-slide-right {
    animation: slideInRight 0.3s ease;
}

/* ==========================================
   UTILITIES
   ========================================== */

.zn-text-center { text-align: center; }
.zn-text-left { text-align: left; }
.zn-text-right { text-align: right; }

.zn-hidden { display: none !important; }
.zn-visible { display: block !important; }

.zn-flex { display: flex; }
.zn-flex-center { display: flex; align-items: center; justify-content: center; }
.zn-flex-between { display: flex; align-items: center; justify-content: space-between; }

.zn-mt-1 { margin-top: 8px; }
.zn-mt-2 { margin-top: 16px; }
.zn-mb-1 { margin-bottom: 8px; }
.zn-mb-2 { margin-bottom: 16px; }

.zn-p-1 { padding: 8px; }
.zn-p-2 { padding: 16px; }

/* Facebook-style unified chrome: same canvas, invisible scrollbars, no column dividers */
/* ==========================================
   LIQUID GLASS - FALLBACK & ENHANCEMENTS
   ========================================== */

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(1px)) {
    :root {
        --zn-bg-secondary: #1e2030;
        --zn-bg-tertiary: #252838;
        --zn-bg-card: #1e2030;
        --zn-glass-bg: #1e2030;
        --zn-glass-bg-heavy: #252838;
    }
    [data-theme="light"] {
        --zn-bg-secondary: #f5f5fa;
        --zn-bg-tertiary: #ebebf0;
        --zn-bg-card: #f0f0f5;
        --zn-glass-bg: #f5f5fa;
        --zn-glass-bg-heavy: #ebebf0;
    }
}

/* Liquid Glass utility classes */
.zn-glass {
    background: var(--zn-glass-bg);
    backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    border: 1px solid var(--zn-glass-border);
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-glass-heavy {
    background: var(--zn-glass-bg-heavy);
    backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    border: 1px solid var(--zn-glass-border);
    box-shadow: var(--zn-glass-inner-shadow), var(--zn-shadow-sm);
}

/* Glass card — reusable for any content block in templates */
.zn-glass-card {
    background: var(--zn-glass-bg);
    backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    -webkit-backdrop-filter: blur(var(--zn-glass-blur)) saturate(var(--zn-glass-saturation));
    border: 1px solid var(--zn-glass-border);
    border-radius: var(--zn-border-radius-lg);
    box-shadow: var(--zn-glass-inner-shadow);
    position: relative;
    overflow: hidden;
}

.zn-glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--zn-glass-specular);
    pointer-events: none;
    z-index: 0;
}

/* Glass input fields */
.zn-glass-input {
    background: var(--zn-glass-bg);
    border: 1px solid var(--zn-glass-border);
    color: var(--zn-text-primary);
    transition: var(--zn-transition);
}

.zn-glass-input:focus {
    outline: none;
    border-color: var(--zn-accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 112, 67, 0.15), var(--zn-glass-inner-shadow);
    background: var(--zn-glass-bg-heavy);
}

/* Glass accent button */
.zn-glass-btn-accent {
    background: var(--zn-accent-gradient);
    color: white;
    border: none;
    border-radius: var(--zn-border-radius);
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--zn-transition);
    box-shadow: 0 4px 16px rgba(255,112,67,0.3), inset 0 1px 0 rgba(255,255,255,0.20);
}

.zn-glass-btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(255,112,67,0.4), inset 0 1px 0 rgba(255,255,255,0.25);
}

/* Glass subtle button */
.zn-glass-btn {
    background: var(--zn-glass-bg);
    color: var(--zn-text-primary);
    border: 1px solid var(--zn-glass-border);
    border-radius: var(--zn-border-radius);
    padding: 10px 20px;
    cursor: pointer;
    transition: var(--zn-transition);
    box-shadow: var(--zn-glass-inner-shadow);
}

.zn-glass-btn:hover {
    background: var(--zn-glass-bg-heavy);
    border-color: var(--zn-glass-border-bright);
    transform: translateY(-1px);
}

/* Smooth light refraction on scrollable areas — disabled */
.zn-sidebar-left::after,
.zn-sidebar-right::after {
    display: none;
}