.hub-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    background: var(--bg-base);
    color: var(--text-main);
    overflow: hidden;
}

::deep .hub-sidebar {
    width: 80px;
    height: 100%;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    flex-shrink: 0;
    transition: width 0.2s ease;
}

::deep .sidebar-header {
    padding: 2rem 0;
    display: flex;
    justify-content: center;
}

::deep .logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

::deep .logo-icon {
    color: #10b981;
    filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.3));
}

::deep .logo-text {
    display: none;
}

::deep .sidebar-nav {
    flex: 1;
    padding: 0.5rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

::deep .nav-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 54px;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease;
    position: relative;
}

::deep .nav-item:hover {
    color: #10b981;
    background: rgba(0, 0, 0, 0.04);
}

::deep .nav-item:focus-visible {
    outline: 2px solid #10b981;
    outline-offset: -2px;
}

::deep .nav-item.active {
    color: #10b981;
    background: rgba(16, 185, 129, 0.04);
}

::deep .nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 15%;
    height: 70%;
    width: 3px;
    background: #10b981;
    border-radius: 0 4px 4px 0;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.6);
}

::deep .nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    transition: color 0.2s ease;
}

::deep .nav-text {
    display: none;
}

::deep .sidebar-footer {
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

::deep .user-brief {
    display: flex;
    justify-content: center;
    width: 100%;
}

::deep .user-avatar {
    width: 36px;
    height: 36px;
    background: var(--bg-base);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    flex-shrink: 0;
}

::deep .user-details {
    display: none;
}

::deep .logout-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

::deep .logout-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    color: #ef4444;
}

.hub-main {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    background: var(--bg-base);
}

.hub-content {
    padding: 2.5rem;
    min-height: 100%;
}

::deep .hub-loading {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

::deep .nexus-loader {
    width: 32px;
    height: 32px;
    border: 2px solid rgba(16, 185, 129, 0.1);
    border-top-color: #10b981;
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    filter: drop-shadow(0 0 5px #10b981);
}

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

/* Mobile Styles */
.nexus-mobile-topbar {
    display: none;
}

.reader-mobile-dock {
    display: none;
}

@media (max-width: 767px) {
    .nexus-mobile-topbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: var(--bg-surface);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 0 1.25rem;
        z-index: 150;
    }

    .hamburger-btn {
        background: transparent;
        border: none;
        color: #e0e0e0;
        cursor: pointer;
        padding: 0.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        transition: background-color 0.2s;
        min-height: 48px;
        min-width: 48px;
        touch-action: manipulation;
    }

    .hamburger-btn:hover {
        background: rgba(255, 255, 255, 0.05);
    }

    .mobile-logo {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .pulsing-logo {
        animation: pulse-glow 2s infinite ease-in-out;
    }

    @keyframes pulse-glow {
        0%, 100% {
            filter: drop-shadow(0 0 5px rgba(0, 255, 153, 0.4));
            opacity: 0.8;
        }
        50% {
            filter: drop-shadow(0 0 12px rgba(0, 255, 153, 0.8));
            opacity: 1;
        }
    }

    .mobile-user-pill {
        display: flex;
        align-items: center;
    }

    .user-avatar-mini {
        width: 32px;
        height: 32px;
        background: linear-gradient(135deg, var(--nexus-neon) 0%, #0099ff 100%);
        border: 1px solid var(--border);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.85rem;
        font-weight: 700;
        color: #121212;
        box-shadow: 0 0 10px rgba(0, 255, 153, 0.2);
    }

    .mobile-sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 190;
        animation: fade-in 0.2s ease-out;
    }

    @keyframes fade-in {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    ::deep .hub-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        height: 100%;
        background: var(--bg-surface);
        z-index: 200;
        transform: translateX(-100%);
        will-change: transform;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: none;
    }

    .mobile-menu-open ::deep .hub-sidebar {
        transform: translateX(0);
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .hub-container {
        flex-direction: column;
    }

    .hub-main {
        margin-top: 60px;
        width: 100%;
        height: calc(100vh - 60px);
    }

    .hub-content {
        padding: 1.25rem;
    }

    ::deep .sidebar-header {
        padding: 1.5rem 1.25rem;
        border-bottom: 1px solid var(--border);
    }

    ::deep .sidebar-nav {
        padding: 1rem 0;
    }

    ::deep .nav-item {
        padding: 0.9rem 1.25rem;
        font-size: 0.95rem;
        min-height: 48px; /* Touch target */
    }

    ::deep .sidebar-footer {
        padding: 1rem 1.25rem;
    }
}

/* ============================================================
   LIGHT THEME OVERRIDES — "Warm Paper / Soft Sepia"
   Scoped via .theme-light on an ancestor element.
   ============================================================ */

/* --- Desktop Sidebar: warm paper shadow --- */
.theme-light ::deep .hub-sidebar {
    box-shadow: 4px 0 20px rgba(139, 130, 115, 0.08);
    background: var(--bg-surface) !important;
    border-right: 1px solid var(--border) !important;
}

/* --- Logo icon: remove neon glow --- */
.theme-light ::deep .logo-icon {
    filter: none;
}

/* --- Nav item hover: ensure green text, warm hover bg --- */
.theme-light ::deep .nav-item:hover {
    color: #10b981;
    background: rgba(0, 0, 0, 0.02);
}

/* --- Nav active indicator: reduced glow --- */
.theme-light ::deep .nav-item.active::before {
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

/* --- Nexus loader: remove neon drop-shadow --- */
.theme-light ::deep .nexus-loader {
    filter: none;
}

/* --- Mobile Styles --- */
@media (max-width: 768px) {

    /* Hamburger button: dark text on warm paper */
    .theme-light .hamburger-btn {
        color: #292524;
    }

    .theme-light .hamburger-btn:hover {
        background: rgba(0, 0, 0, 0.04);
    }

    /* User avatar mini: solid accent, white text, no neon glow */
    .theme-light .user-avatar-mini {
        background: #10b981;
        color: #ffffff;
        box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
    }

    /* Pulsing logo: subtle accent pulse, no neon glow */
    .theme-light .pulsing-logo {
        animation: pulse-glow-light 2s infinite ease-in-out;
    }

    @keyframes pulse-glow-light {
        0%, 100% {
            filter: none;
            opacity: 0.85;
        }
        50% {
            filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.2));
            opacity: 1;
        }
    }

    /* Mobile sidebar open state: warm shadow instead of dark */
    .theme-light .mobile-menu-open ::deep .hub-sidebar {
        box-shadow: 10px 0 30px rgba(139, 130, 115, 0.2);
    }


    /* Content padding for bottom navigation dock */
    .hub-content {
        padding: 1.25rem 1.25rem calc(1.25rem + 96px + env(safe-area-inset-bottom, 0px)) !important;
    }

    /* Reader Mobile Dock v3 */
    ::deep .reader-mobile-dock {
        display: flex;
        position: fixed;
        bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        left: 20px;
        right: 20px;
        height: 64px;
        background: rgba(26, 26, 30, 0.75); /* Translucent dark mode */
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border); /* Microscopic perimeter border */
        border-radius: 30px; /* Floating capsule rounded borders */
        z-index: 150;
        padding: 0 16px;
        justify-content: space-around;
        align-items: center;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    }
    
    ::deep .dock-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        flex: 1;
        height: 100%;
        color: var(--text-muted);
        text-decoration: none;
        transition: color 0.2s ease, filter 0.2s ease;
        position: relative;
        gap: 2px;
    }
    
    ::deep .dock-item:hover, ::deep .dock-item.active {
        color: var(--accent) !important;
        filter: drop-shadow(0 0 4px var(--accent-glow)); /* Clean accent glow drop-shadow */
    }

    ::deep .dock-item ::deep svg,
    ::deep .dock-item ::deep .nexus-icon,
    ::deep .dock-item svg,
    ::deep .dock-item .nexus-icon {
        color: inherit !important;
        fill: currentColor !important;
    }
    
    ::deep .dock-text {
        display: block !important;
        font-size: 10px;
        font-weight: 500;
        margin-top: 2px;
        white-space: nowrap;
        color: inherit;
    }

    /* Central action button style */
    ::deep .dock-item.central-action {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        position: relative;
        flex: 1;
        height: 100%;
        gap: 2px;
        margin-top: 0;
        transform: none !important;
        z-index: 160;
    }
    
    ::deep .central-action-inner {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--accent); /* Solid green background */
        color: #ffffff !important; /* White robot icon */
        display: flex;
        align-items: center;
        justify-content: center;
        border: none !important;
        box-shadow: 0 4px 10px rgba(0, 255, 153, 0.3);
        transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease;
    }

    ::deep .central-action-inner ::deep svg,
    ::deep .central-action-inner ::deep .nexus-icon,
    ::deep .central-action-inner svg,
    ::deep .central-action-inner .nexus-icon {
        color: #ffffff !important;
        fill: currentColor !important;
    }
    
    ::deep .dock-item.central-action:hover .central-action-inner,
    ::deep .dock-item.central-action.active .central-action-inner {
        transform: scale(1.05);
        box-shadow: 0 4px 14px rgba(0, 255, 153, 0.5);
    }

    ::deep .central-action-glow {
        display: none; /* Purged background glow */
    }

    /* Light Theme Overrides */
    .theme-light ::deep .reader-mobile-dock {
        background: rgba(244, 241, 234, 0.9); /* Translucent light mode warm paper background */
        box-shadow: 0 8px 30px rgba(139, 130, 115, 0.15);
    }
    
    .theme-light ::deep .dock-item {
        color: var(--text-muted);
    }
    
    .theme-light ::deep .dock-item:hover, .theme-light ::deep .dock-item.active {
        color: var(--accent) !important;
        filter: drop-shadow(0 0 3px var(--accent-glow));
    }
    
    .theme-light ::deep .central-action-inner {
        background: var(--accent) !important;
        color: #ffffff !important;
        border: none !important;
        box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25) !important;
    }
    
    .theme-light ::deep .dock-item.central-action:hover .central-action-inner,
    .theme-light ::deep .dock-item.central-action.active .central-action-inner {
        box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35) !important;
        transform: scale(1.05);
    }
    
    .theme-light ::deep .central-action-glow {
        display: none;
    }
}