/* ==========================================================================
   Responsive Layout (Desktop Sidebar / Mobile Floating Navigation)
   ========================================================================== */

.app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
    background-color: var(--bg-main);
}

/* Sidebar Desktop */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    padding: 24px 16px 16px 16px;
    z-index: 100;
    transition: width var(--transition-normal), background-color var(--transition-normal);
    backdrop-filter: blur(16px);
}

/* Sidebar collapse toggle (desktop only) */
.sidebar-toggle-btn {
    display: none;
    position: absolute;
    top: 20px;
    right: -12px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 12px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 101;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.sidebar-toggle-btn:hover {
    background: var(--bg-surface-hover);
    color: var(--primary);
    border-color: var(--primary);
}

@media (min-width: 1024px) {
    .sidebar-toggle-btn {
        display: flex;
    }
}

/* Collapsed sidebar state */
.app-sidebar[data-sidebar-collapsed="true"] {
    width: var(--sidebar-collapsed-width);
    padding: 24px 8px 16px 8px;
    align-items: center;
}

.app-sidebar[data-sidebar-collapsed="true"] .brand-logo {
    padding: 0 0 20px 0;
    justify-content: center;
}

.app-sidebar[data-sidebar-collapsed="true"] .brand-logo span,
.app-sidebar[data-sidebar-collapsed="true"] .nav-item span,
.app-sidebar[data-sidebar-collapsed="true"] .sidebar-footer span,
.app-sidebar[data-sidebar-collapsed="true"] .sidebar-user-card span {
    display: none;
}

.app-sidebar[data-sidebar-collapsed="true"] .nav-item {
    justify-content: center;
    padding: 12px;
}

.app-sidebar[data-sidebar-collapsed="true"] .nav-item:hover {
    transform: scale(1.08);
}

.app-sidebar[data-sidebar-collapsed="true"] ~ .app-main {
    margin-left: var(--sidebar-collapsed-width);
}

.app-sidebar[data-sidebar-collapsed="true"] .sidebar-toggle-btn {
    right: -12px;
}

/* Sidebar hover tooltip on collapsed (desktop only) */
@media (min-width: 1024px) {
    .app-sidebar[data-sidebar-collapsed="true"] .nav-item {
        position: relative;
    }

    .app-sidebar[data-sidebar-collapsed="true"] .nav-item:hover::after {
        content: attr(data-label);
        position: absolute;
        left: calc(100% + 12px);
        top: 50%;
        transform: translateY(-50%);
        background: var(--bg-surface);
        color: var(--text-main);
        font-size: 13px;
        font-weight: 600;
        white-space: nowrap;
        padding: 6px 14px;
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        z-index: 200;
        pointer-events: none;
    }
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 14px 24px 14px;
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
    flex-shrink: 0;
}

.brand-logo i {
    font-size: 30px;
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: heartBeat 2.5s ease-in-out infinite;
    display: inline-block;
}

.brand-logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-right: 4px;
    margin-right: -4px;
    transition: scrollbar-color 0.2s ease;
}

/* Thanh cuộn tinh tế chuẩn app: ẩn mặc định, chỉ hiện thanh trôi siêu mảnh 4px khi rê chuột */
.nav-menu::-webkit-scrollbar {
    width: 4px;
    background: transparent;
}

.nav-menu::-webkit-scrollbar-track {
    background: transparent;
}

.nav-menu::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 999px;
    transition: background 0.2s ease;
}

.nav-menu:hover {
    scrollbar-width: thin;
    scrollbar-color: rgba(140, 150, 170, 0.28) transparent;
}

.nav-menu:hover::-webkit-scrollbar-thumb {
    background: rgba(140, 150, 170, 0.28);
}

.nav-menu:hover::-webkit-scrollbar-thumb:hover {
    background: rgba(140, 150, 170, 0.55);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    position: relative;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-item.active {
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    position: relative;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
    animation: motionFadeIn 0.3s var(--ease-emphasized) both;
}

.nav-item.active i {
    color: var(--primary);
    transform: scale(1.1);
}

.nav-item i {
    font-size: 22px;
    width: 28px;
    text-align: center;
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.nav-item .badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    position: absolute;
    right: 16px;
    box-shadow: 0 0 8px var(--primary);
    animation: pulseGlow 2s infinite;
}

/* Sidebar Footer */
.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
    flex-shrink: 0;
}

.sidebar-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    background: var(--bg-surface-hover);
    margin-top: 8px;
    flex-shrink: 0;
    transition: background var(--transition-fast);
}

.sidebar-user-card:hover {
    background: var(--bg-surface-active);
}

/* Main Content Area */
.app-main {
    flex: 1;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: clip;
    box-sizing: border-box;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 28px 24px 80px 24px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    transition: margin-left var(--transition-normal);
}

.app-workspace-content {
    flex: 1;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: clip;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
}

.feed-container {
    width: 100%;
    max-width: 760px;
    min-width: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Right Panel for Suggestions & Trends */
.app-right-panel {
    width: var(--right-panel-width);
    margin-left: 32px;
    display: none;
    flex-shrink: 0;
    position: sticky;
    top: 88px;
    align-self: flex-start;
    max-height: calc(100vh - 104px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-right: 4px;
    transition: scrollbar-color 0.2s ease;
}

/* Thanh cuộn tinh tế chuẩn app: ẩn mặc định, chỉ hiện thanh trôi siêu mảnh 4px khi rê chuột */
.app-right-panel::-webkit-scrollbar {
    width: 4px;
    background: transparent;
}

.app-right-panel::-webkit-scrollbar-track {
    background: transparent;
}

.app-right-panel::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 999px;
    transition: background 0.2s ease;
}

.app-right-panel:hover {
    scrollbar-width: thin;
    scrollbar-color: rgba(140, 150, 170, 0.28) transparent;
}

.app-right-panel:hover::-webkit-scrollbar-thumb {
    background: rgba(140, 150, 170, 0.28);
}

.app-right-panel:hover::-webkit-scrollbar-thumb:hover {
    background: rgba(140, 150, 170, 0.55);
}

/* Scroll sentinel for top header shadow */
.scroll-sentinel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    pointer-events: none;
}

/* Scroll-aware top header shadow */
.app-top-header.scrolled {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* Mobile search expandable */
.mobile-search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-search-btn:hover {
    color: var(--primary);
    background: var(--bg-surface-hover);
}

.mobile-search-expanded {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 10px 16px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 149;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.mobile-search-expanded.show {
    display: block;
}

.mobile-search-input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-fast);
}

.mobile-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.right-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.right-card:hover {
    box-shadow: var(--shadow-md);
}

.right-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.right-card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
}

.trend-tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: var(--bg-surface-hover);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 600;
    margin: 4px 4px 4px 0;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.trend-tag-chip:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: rgba(255, 45, 85, 0.2);
    transform: translateY(-2px);
}

.trend-tag-chip i {
    color: var(--primary);
}

.trend-tag-count {
    font-size: 11px;
    opacity: 0.7;
}

/* Suggested user rows in right panel */
.suggested-user-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.suggested-user-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    min-width: 0;
}

.suggested-user-info {
    min-width: 0;
    max-width: 130px;
}

.suggested-user-name {
    font-weight: 700;
    font-size: 13.5px;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.suggested-user-username {
    font-size: 11.5px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.suggested-user-follow {
    padding: 4px 12px !important;
    font-size: 12px !important;
    border-radius: var(--radius-full) !important;
    flex-shrink: 0;
}

.suggested-user-empty {
    font-size: 12px;
    color: var(--text-muted);
}

@media (min-width: 1180px) {
    .app-right-panel {
        display: block;
    }
}

/* Mobile Header (Frosted Glass with Safe Area) */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-header-height, 56px);
    padding-top: var(--safe-top, 0px);
    background-color: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding-left: max(var(--safe-left, 0px), 16px);
    padding-right: max(var(--safe-right, 0px), 16px);
    align-items: center;
    justify-content: space-between;
    z-index: 150;
    box-shadow: var(--shadow-xs);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.mobile-header .brand-logo {
    padding: 0;
    font-size: 22px;
}

.mobile-header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.mobile-user-chip-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: transparent;
    border: none;
    padding: 2px;
    cursor: pointer;
    border-radius: 50%;
}

.mobile-user-chip-btn .avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1.5px solid var(--primary);
    object-fit: cover;
}

.mobile-user-chip-btn .online-pulse-dot {
    position: absolute;
    bottom: 1px;
    right: 1px;
    width: 9px;
    height: 9px;
    border: 1.5px solid var(--bg-surface);
}

/* Mobile User Sheet Drawer */
.mobile-sheet-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 990;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.mobile-sheet-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-sheet-content {
    width: 100%;
    max-width: 500px;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    border-radius: 24px 24px 0 0;
    box-shadow: var(--shadow-xl);
    padding: 12px 18px calc(max(var(--safe-bottom, 0px), 16px) + 16px) 18px;
    transform: translateY(100%);
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
    max-height: 85vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.mobile-sheet-backdrop.open .mobile-sheet-content {
    transform: translateY(0);
}

.mobile-sheet-handle-bar {
    display: flex;
    justify-content: center;
    padding: 4px 0 12px 0;
}

.mobile-sheet-handle {
    width: 42px;
    height: 4px;
    background: var(--border-color);
    border-radius: 999px;
}

.mobile-sheet-user-header {
    padding: 6px 0 12px 0;
}

.mobile-sheet-user-card {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    padding: 8px 6px;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mobile-sheet-user-card:active {
    background: var(--bg-surface-hover);
}

.mobile-sheet-user-meta {
    flex: 1;
    min-width: 0;
}

.mobile-sheet-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
}

.mobile-sheet-menu {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.mobile-sheet-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    text-decoration: none;
    transition: background var(--transition-fast);
    cursor: pointer;
}

.mobile-sheet-item:active {
    background: var(--bg-surface-hover);
}

.mobile-sheet-item i {
    font-size: 20px;
    width: 26px;
    text-align: center;
    color: var(--text-muted);
}

.mobile-sheet-footer {
    padding-top: 10px;
}

.mobile-sheet-logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 13px;
    border-radius: var(--radius-full);
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.25);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-sheet-logout-btn:active {
    background: rgba(239, 68, 68, 0.22);
    transform: scale(0.98);
}

/* Mobile Welcome & Loading Splash Screen */
.mobile-welcome-splash {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-main);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 24px;
    transition: opacity 0.35s ease, transform 0.35s ease;
}

@media (max-width: 1023px) {
    .mobile-welcome-splash {
        display: flex;
    }
}

.mobile-welcome-splash.fade-out {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.03);
}

.splash-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 320px;
    animation: splashPopIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.splash-logo-container {
    position: relative;
    width: 84px;
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.splash-pulse-glow {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.35;
    filter: blur(14px);
    animation: splashPulse 2s ease-in-out infinite alternate;
}

.splash-heart-icon {
    font-size: 46px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: heartBeat 2s ease-in-out infinite;
    z-index: 1;
}

.splash-brand-text {
    font-family: var(--font-display);
    font-size: 34px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.splash-tagline {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 6px;
    margin-bottom: 26px;
    font-weight: 500;
}

.splash-progress-track {
    width: 160px;
    height: 4px;
    background: var(--border-color);
    border-radius: 999px;
    overflow: hidden;
    position: relative;
}

.splash-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 45%;
    background: var(--gradient-primary);
    border-radius: 999px;
    animation: splashIndeterminate 1.4s ease-in-out infinite;
}

.splash-loading-label {
    margin-top: 14px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.2px;
}

@keyframes splashPopIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes splashPulse {
    from { transform: scale(0.95); opacity: 0.25; }
    to { transform: scale(1.15); opacity: 0.5; }
}

@keyframes splashIndeterminate {
    0% { left: -45%; width: 45%; }
    50% { left: 30%; width: 60%; }
    100% { left: 100%; width: 45%; }
}

/* Mobile Bottom Navigation (Floating Glass Capsule Dock) */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: calc(max(var(--safe-bottom, 0px), 8px) + 8px);
    left: 14px;
    right: 14px;
    max-width: 440px;
    margin: 0 auto;
    height: 64px;
    background: rgba(18, 18, 24, 0.84);
    backdrop-filter: blur(28px) saturate(210%);
    -webkit-backdrop-filter: blur(28px) saturate(210%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 34px;
    align-items: center;
    justify-content: space-around;
    padding: 0 10px;
    z-index: 200;
    box-shadow: 0 16px 36px -4px rgba(0, 0, 0, 0.48), 0 0 1px 1px rgba(255, 255, 255, 0.08), 0 4px 14px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-normal);
}

[data-theme="light"] .mobile-bottom-nav {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 14px 32px -4px rgba(0, 0, 0, 0.12), 0 0 1px 1px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 21px;
    flex: 1;
    height: 100%;
    position: relative;
    transition: color var(--transition-fast), transform var(--transition-fast);
    padding: 8px 0;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
}

.bottom-nav-item i {
    font-size: 21px;
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.bottom-nav-item.active {
    color: var(--color-primary);
}

.bottom-nav-item.active i {
    transform: scale(1.12);
    color: var(--color-primary);
}

.bottom-nav-dot {
    display: none;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 6px var(--color-primary);
    margin-top: 3px;
    transition: opacity var(--transition-fast);
}

.bottom-nav-item.active .bottom-nav-dot {
    display: block;
}

.bottom-nav-item:active i {
    transform: scale(0.88);
}

.bottom-nav-avatar-wrap {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    padding: 1.5px;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.bottom-nav-item.active .bottom-nav-avatar-wrap {
    border-color: var(--color-primary);
    box-shadow: 0 0 8px rgba(255, 45, 85, 0.35);
}

.bottom-nav-avatar-wrap .avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* Center FAB Container & Button */
.bottom-nav-fab-wrap {
    flex: 0 0 54px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 5;
}

.bottom-nav-fab {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFF !important;
    font-size: 22px;
    box-shadow: 0 8px 24px rgba(255, 45, 85, 0.45), 0 2px 6px rgba(255, 45, 85, 0.3);
    margin-top: -16px;
    border: 3px solid var(--bg-surface, #121216);
    cursor: pointer;
    text-decoration: none;
    position: relative;
    transition: transform var(--transition-spring), box-shadow var(--transition-fast);
    animation: fabFloatPulse 3s ease-in-out infinite;
}

[data-theme="light"] .bottom-nav-fab {
    border-color: #FFFFFF;
}

.bottom-nav-fab i {
    font-size: 22px !important;
    color: #FFF !important;
    font-weight: 700;
}

.fab-glow-ring {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.35;
    filter: blur(6px);
    z-index: -1;
    pointer-events: none;
}

.bottom-nav-fab:hover, .bottom-nav-fab:active {
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 10px 28px rgba(255, 45, 85, 0.65);
}

@keyframes fabFloatPulse {
    0%, 100% {
        box-shadow: 0 8px 24px rgba(255, 45, 85, 0.45), 0 2px 6px rgba(255, 45, 85, 0.3);
    }
    50% {
        box-shadow: 0 10px 30px rgba(255, 45, 85, 0.65), 0 4px 10px rgba(255, 45, 85, 0.45);
    }
}

/* Tablet Responsive (768px - 1023px) */
@media (max-width: 1023px) {
    .app-sidebar {
        width: var(--sidebar-collapsed-width);
        padding: 20px 8px;
        align-items: center;
    }
    .brand-logo span, .nav-item span, .sidebar-footer span, .sidebar-user-card span {
        display: none;
    }
    .brand-logo {
        padding: 0 0 20px 0;
        justify-content: center;
    }
    .nav-item {
        justify-content: center;
        padding: 12px;
    }
    .nav-item:hover {
        transform: scale(1.08);
    }
    .app-main {
        margin-left: var(--sidebar-collapsed-width);
    }
}

/* Mobile Responsive (< 768px) */
@media (max-width: 767px) {
    .app-sidebar {
        display: none !important;
    }
    .app-top-header {
        display: none !important;
    }
    .app-right-panel {
        display: none !important;
    }
    .mobile-header, .mobile-bottom-nav {
        display: flex;
    }
    .app-main {
        margin-left: 0 !important;
        padding-top: calc(var(--mobile-header-height, 56px) + 8px);
        padding-bottom: calc(80px + var(--safe-bottom, 0px) + 16px);
        padding-left: max(var(--safe-left, 0px), 0px);
        padding-right: max(var(--safe-right, 0px), 0px);
        min-height: 100dvh;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    .feed-container {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        padding: 0 10px;
        box-sizing: border-box !important;
        gap: 14px;
    }

    /* Mobile: Full-width content container */
    .app-workspace-content {
        padding: 0;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }

    /* Mobile: Better header */
    .mobile-header {
        height: var(--mobile-header-height, 56px);
        padding-top: var(--safe-top, 0px);
        background-color: var(--bg-glass);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        padding-left: max(var(--safe-left, 0px), 14px);
        padding-right: max(var(--safe-right, 0px), 14px);
        align-items: center;
        justify-content: space-between;
        z-index: 150;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    }

    /* Mobile Floating Dock Navigation */
    .mobile-bottom-nav {
        display: flex !important;
        height: 64px;
    }

    #mobile-bottom-msg-badge {
        position: absolute;
        top: 6px;
        right: 14px;
        font-size: 10px;
        padding: 2px 5px;
        min-width: 16px;
        height: 16px;
        line-height: 12px;
        box-shadow: 0 0 0 2px var(--bg-surface, #121216);
    }
}

/* Ultra Small Mobile Screens (< 420px) */
@media (max-width: 420px) {
    .app-main {
        padding-left: max(var(--safe-left, 0px), 4px);
        padding-right: max(var(--safe-right, 0px), 4px);
    }
}