/* ==========================================================================
   Layout — Sidebar, topbar, main content area shell.
   ========================================================================== */

/* --------------------------------------------------------------------------
   App shell
   -------------------------------------------------------------------------- */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Sidebar (desktop)
   -------------------------------------------------------------------------- */
.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    overflow-y: auto;
    overflow-x: hidden;
    transition: width var(--transition-slow);
}

/* Collapsed state */
.app-sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

/* Collapsed header: show only the toggle arrow, centred */
.app-sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-4) var(--space-2);
}

.app-sidebar.collapsed .sidebar-logo,
.app-sidebar.collapsed .sidebar-logo-placeholder {
    display: none;
}

/* Ensure toggle arrow stays visible and centred when collapsed */
.app-sidebar.collapsed .sidebar-toggle {
    margin-left: 0;
}

.app-sidebar.collapsed .sidebar-logo-text,
.app-sidebar.collapsed .sidebar-section-label,
.app-sidebar.collapsed .sidebar-item-label,
.app-sidebar.collapsed .sidebar-user-info {
    opacity: 0;
    visibility: hidden;
    width: 0;
    overflow: hidden;
    transition:
        opacity var(--transition-fast),
        visibility var(--transition-fast);
}

.app-sidebar.collapsed .sidebar-item {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

.app-sidebar.collapsed .sidebar-item-icon {
    margin-right: 0;
}

/* --------------------------------------------------------------------------
   Sidebar — icon rail (default collapsed, expand on hover)
   -------------------------------------------------------------------------- */
.app-sidebar.sidebar-rail {
    width: var(--sidebar-collapsed-width);
}

.app-sidebar.sidebar-rail.sidebar-hover-expanded {
    width: var(--sidebar-width);
    z-index: calc(var(--z-fixed) + 20);
    box-shadow: var(--shadow-xl);
}

/* Rail: show logo mark, hide university name until expanded */
.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-header {
    justify-content: center;
    padding: var(--space-3) var(--space-2);
}

.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-logo,
.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-logo-placeholder {
    display: flex;
}

.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-logo-text,
.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-section-label,
.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-item-label,
.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-user-info {
    opacity: 0;
    visibility: hidden;
    width: 0;
    overflow: hidden;
}

.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-item {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

.app-sidebar.sidebar-rail.collapsed:not(.sidebar-hover-expanded) .sidebar-item-icon {
    margin-right: 0;
}

/* Expanded hover state — restore labels */
.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-header {
    justify-content: flex-start;
    padding: var(--space-4);
}

.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-logo-text,
.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-section-label,
.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-item-label,
.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-user-info {
    opacity: 1;
    visibility: visible;
    width: auto;
    transition:
        opacity var(--transition-fast),
        visibility var(--transition-fast);
}

.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-item {
    justify-content: flex-start;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.app-sidebar.sidebar-rail.sidebar-hover-expanded .sidebar-item-icon {
    margin-right: var(--space-3);
}

/* Suppress flyout tooltips while rail is expanded (labels visible) */
.app-sidebar.sidebar-rail.sidebar-hover-expanded [data-tooltip]::after {
    display: none;
}

/* Main layout stays on rail width — expanded sidebar overlays content */
.app-sidebar.sidebar-rail ~ .app-main {
    margin-left: var(--sidebar-collapsed-width);
}

.app-sidebar.sidebar-rail ~ .app-main .app-topbar {
    left: var(--sidebar-collapsed-width);
}

/* Sidebar header */
.sidebar-header {
    display: flex;
    align-items: center;
    padding: var(--space-4) var(--space-4);
    border-bottom: 1px solid var(--sidebar-divider);
    min-height: 64px;
    flex-shrink: 0;
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    object-fit: contain;
    flex-shrink: 0;
    background: var(--color-white);
}

.sidebar-logo-placeholder {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--color-accent);
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.sidebar-logo-text {
    margin-left: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--sidebar-text-active);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition:
        opacity var(--transition-fast),
        margin var(--transition-fast);
}

/* Sidebar nav */
.sidebar-nav {
    flex: 1;
    padding: var(--space-2) 0;
    overflow-y: auto;
}

/* Section labels */
.sidebar-section-label {
    margin: var(--space-3) var(--space-4) var(--space-1);
    padding: 0 var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sidebar-section-label);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-fast);
}

/* Nav items */
.sidebar-item {
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    margin: 1px var(--space-2);
    border-radius: var(--radius-md);
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        padding var(--transition-slow);
    white-space: nowrap;
    position: relative;
    border-left: 3px solid transparent;
}

.sidebar-item:hover {
    background-color: var(--sidebar-item-hover-bg);
    color: var(--sidebar-text-active);
    text-decoration: none;
}

.sidebar-item.active {
    background-color: var(--sidebar-item-active-bg);
    color: var(--sidebar-text-active);
    border-left-color: var(--color-accent);
}

.sidebar-item-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-right: var(--space-3);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: margin var(--transition-slow);
}

.sidebar-item-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.sidebar-item-label {
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity var(--transition-fast);
}

/* Sidebar footer */
.sidebar-footer {
    flex-shrink: 0;
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--sidebar-divider);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sidebar-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xs);
    flex-shrink: 0;
}

.sidebar-user-info {
    overflow: hidden;
    transition: opacity var(--transition-fast);
}

.sidebar-user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--sidebar-text-active);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-role {
    font-size: var(--font-size-xs);
    color: var(--sidebar-text);
}

/* Sidebar collapse toggle */
.sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--sidebar-divider);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--sidebar-text);
    cursor: pointer;
    margin-left: auto;
    flex-shrink: 0;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-slow);
}

.sidebar-toggle:hover {
    background-color: var(--sidebar-item-hover-bg);
    color: var(--sidebar-text-active);
}

.app-sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

.sidebar-toggle svg {
    width: 16px;
    height: 16px;
}

/* Sidebar logout link */
.sidebar-logout {
    display: flex;
    align-items: center;
    padding: var(--space-2) var(--space-2);
    margin-top: var(--space-2);
    color: var(--sidebar-text);
    font-size: var(--font-size-xs);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.sidebar-logout:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--sidebar-text-active);
}

.sidebar-logout svg {
    width: 16px;
    height: 16px;
    margin-right: var(--space-2);
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

/* --------------------------------------------------------------------------
   Sidebar — light variant (for body.sidebar-light)
   -------------------------------------------------------------------------- */
body.sidebar-light .app-sidebar {
    --sidebar-bg: var(--color-white);
    --sidebar-text: var(--color-text-secondary);
    --sidebar-text-active: var(--color-primary);
    --sidebar-item-active-bg: var(--color-primary);
    --sidebar-item-hover-bg: var(--color-gray-100);
    --sidebar-section-label: var(--color-text-muted);
    --sidebar-divider: var(--color-border);
    border-right: 1px solid var(--color-border);
}

body.sidebar-light .app-sidebar .sidebar-item.active {
    --sidebar-text-active: var(--color-white);
    color: var(--color-white);
}

body.sidebar-light .app-sidebar .sidebar-item.active .sidebar-item-icon svg {
    stroke: var(--color-white);
}

/* --------------------------------------------------------------------------
   Sidebar — minimal variant (always icon-only)
   -------------------------------------------------------------------------- */
body.sidebar-minimal .app-sidebar {
    width: var(--sidebar-collapsed-width);
}

body.sidebar-minimal .app-sidebar .sidebar-logo-text,
body.sidebar-minimal .app-sidebar .sidebar-section-label,
body.sidebar-minimal .app-sidebar .sidebar-item-label,
body.sidebar-minimal .app-sidebar .sidebar-user-info {
    opacity: 0;
    visibility: hidden;
    width: 0;
    overflow: hidden;
}

body.sidebar-minimal .app-sidebar .sidebar-item {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

body.sidebar-minimal .app-sidebar .sidebar-item-icon {
    margin-right: 0;
}

body.sidebar-minimal .app-sidebar.sidebar-rail .sidebar-logo,
body.sidebar-minimal .app-sidebar.sidebar-rail .sidebar-logo-placeholder {
    display: flex;
}

body.sidebar-minimal .app-sidebar .sidebar-toggle {
    display: none;
}

/* --------------------------------------------------------------------------
   Sidebar — dark variant (always dark regardless of theme)
   -------------------------------------------------------------------------- */
body.sidebar-dark .app-sidebar {
    --sidebar-bg: #0f172a;
    --sidebar-text: rgba(255, 255, 255, 0.65);
    --sidebar-text-active: #ffffff;
    --sidebar-item-active-bg: rgba(255, 255, 255, 0.15);
    --sidebar-item-hover-bg: rgba(255, 255, 255, 0.08);
    --sidebar-section-label: rgba(255, 255, 255, 0.35);
    --sidebar-divider: rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   Mobile offcanvas overrides
   -------------------------------------------------------------------------- */
@media (max-width: 767.98px) {
    .app-sidebar {
        display: none !important;
    }
}

/* --------------------------------------------------------------------------
   Topbar
   -------------------------------------------------------------------------- */
.app-topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    z-index: var(--z-sticky);
    display: flex;
    align-items: center;
    padding: 0 var(--content-padding-x);
    background-color: var(--topbar-bg);
    border-bottom: 1px solid var(--topbar-border);
    transition: left var(--transition-slow);
}

/* Topbar shifts when sidebar collapses */
.app-sidebar.collapsed ~ .app-main .app-topbar {
    left: var(--sidebar-collapsed-width);
}

/* Topbar left section */
.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 0;
    flex: 0 1 auto;
}

.topbar-hamburger {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color var(--transition-fast);
}

.topbar-hamburger:hover {
    background-color: var(--color-gray-100);
}

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

@media (max-width: 767.98px) {
    .app-topbar {
        left: 0;
    }
    .topbar-hamburger {
        display: flex;
    }
}

.topbar-page-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Topbar right section */
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
    flex-shrink: 0;
}

/* Global search */
.topbar-search {
    position: relative;
    width: 260px;
}

.topbar-search input {
    width: 100%;
    height: 36px;
    padding: 0 var(--space-3) 0 var(--space-8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background-color: var(--color-gray-50);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        width var(--transition-base);
}

.topbar-search input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(31, 56, 100, 0.1);
    background-color: var(--color-surface);
    width: 320px;
}

.topbar-search input::placeholder {
    color: var(--color-text-muted);
}

.topbar-search-icon {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
    pointer-events: none;
}

.topbar-search-shortcut {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    padding: 1px 6px;
    font-size: 10px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    background: var(--color-gray-200);
    border-radius: var(--radius-sm);
    pointer-events: none;
}

/* Search results dropdown */
.search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    max-height: 320px;
    overflow-y: auto;
    display: none;
}

.search-results.show {
    display: block;
}

.search-results-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.search-results-item:hover {
    background-color: var(--color-gray-50);
}

.search-results-item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.search-results-item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.search-results-footer {
    padding: var(--space-2) var(--space-3);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    cursor: pointer;
}

.search-no-results {
    padding: var(--space-4);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Topbar icon buttons
   -------------------------------------------------------------------------- */
.topbar-icon-btn {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.topbar-icon-btn:hover {
    background-color: var(--color-gray-100);
    color: var(--color-text-primary);
}

.topbar-icon-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
}

.topbar-icon-btn .badge-dot {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    border: 2px solid var(--topbar-bg);
}

.topbar-icon-btn .badge-count {
    position: absolute;
    top: -2px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    color: #fff;
    font-size: 10px;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--topbar-bg);
}

/* Dark mode toggle */
.topbar-theme-toggle svg {
    transition: transform var(--transition-base);
}

.topbar-theme-toggle:hover svg {
    transform: rotate(30deg);
}

/* User dropdown */
.topbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.topbar-user:hover {
    background-color: var(--color-gray-100);
}

.topbar-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--color-primary-light);
    color: var(--color-text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xs);
}

.topbar-user-name {
    font-weight: var(--font-weight-medium);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (max-width: 991.98px) {
    .topbar-user-name {
        display: none;
    }
    .topbar-search {
        width: 180px;
    }
}

@media (max-width: 575.98px) {
    .topbar-search {
        display: none;
    }
}

/* User dropdown menu */
.topbar-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: var(--content-padding-x);
    min-width: 200px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    padding: var(--space-1);
    display: none;
}

.topbar-dropdown.show {
    display: block;
}

.topbar-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    text-decoration: none;
}

.topbar-dropdown-item:hover {
    background-color: var(--color-gray-100);
    text-decoration: none;
}

.topbar-dropdown-item.danger {
    color: var(--color-danger);
}

.topbar-dropdown-item.danger:hover {
    background-color: var(--color-danger-light);
}

/* Notification dropdown */
.notification-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    width: 360px;
    max-height: 480px;
    overflow-y: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    display: none;
}

.notification-dropdown.show {
    display: block;
}

.notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
}

.notification-item {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.notification-item:hover {
    background-color: var(--color-gray-50);
}

.notification-item.unread {
    background-color: var(--color-primary-light);
}

.notification-item.unread::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    flex-shrink: 0;
    margin-top: 5px;
}

.notification-empty {
    padding: var(--space-8) var(--space-4);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Main content area
   -------------------------------------------------------------------------- */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-slow);
}

.app-sidebar.collapsed ~ .app-main {
    margin-left: var(--sidebar-collapsed-width);
}

@media (max-width: 767.98px) {
    .app-main {
        margin-left: 0 !important;
    }
}

.main-content {
    flex: 1;
    padding: var(--content-padding-y) var(--content-padding-x);
    margin-top: 20px;
    max-width: var(--content-max-width);
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

/* Page header */
.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

/* Toolbar-only headers (no left title block) pin actions to the right */
.page-header:not(:has(.page-header-left)) {
    justify-content: flex-end;
}

.page-header-left h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-1);
}

.page-header-left p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 0;
}

.page-header-right {
    display: flex;
    align-items: center;
    /*gap: var(--space-2);*/
    flex-wrap: wrap;
}

/* Breadcrumbs */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-4) 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    padding-top: 10px;
    color: var(--color-text-muted);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    margin: 0 var(--space-2);
    color: var(--color-text-muted);
    font-size: 1.1em;
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    color: var(--color-primary);
}

.breadcrumb-item.active {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* Page content card wrapper */
.content-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-4);
}

.content-card-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.content-card-body {
    padding: var(--space-6);
}

.content-card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-gray-50);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* --------------------------------------------------------------------------
   NProgress-style slim page loader bar
   -------------------------------------------------------------------------- */
#page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: var(--z-tooltip);
    background: transparent;
    pointer-events: none;
}

#page-loader .bar {
    height: 100%;
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-accent)
    );
    width: 0;
    transition: width var(--transition-base);
}

#page-loader.loading .bar {
    animation: page-loader-anim 1.5s ease-in-out infinite;
}

@keyframes page-loader-anim {
    0% {
        width: 0;
        margin-left: 0;
    }
    50% {
        width: 60%;
        margin-left: 0;
    }
    100% {
        width: 100%;
        margin-left: 100%;
    }
}

/* --------------------------------------------------------------------------
   Floating action button
   -------------------------------------------------------------------------- */
.fab {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition:
        background-color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
}

.fab:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.fab:active {
    transform: translateY(0) scale(0.97);
}

.fab svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.fab .badge-count {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    color: #fff;
    font-size: 11px;
    font-weight: var(--font-weight-bold);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-surface);
}

/* ==========================================================================
   Electron custom titlebar
   ========================================================================== */
.titlebar {
    height: 36px;
    background: var(--color-primary);
    -webkit-app-region: drag;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: calc(var(--z-fixed) + 1);
    user-select: none;
    -webkit-user-select: none;
}
.titlebar-left {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-inverse);
    font-size: 13px;
    font-weight: var(--font-weight-medium);
}
.titlebar-left img {
    width: 16px;
    height: 16px;
}
.titlebar-controls {
    -webkit-app-region: no-drag;
    display: flex;
    gap: 8px;
}
.titlebar-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    padding: 0;
    transition: filter 150ms ease;
}
.titlebar-btn:hover {
    filter: brightness(0.85);
}
.titlebar-btn--close {
    background: #ff5f57;
}
.titlebar-btn--minimise {
    background: #febc2e;
}
.titlebar-btn--maximise {
    background: #28c840;
}

/* Shift layout below the titlebar */
.titlebar ~ .app-shell .app-topbar {
    top: 36px;
}
.titlebar ~ .app-shell .app-sidebar {
    top: 36px;
    height: calc(100vh - 36px);
}
.titlebar ~ .app-shell .app-main {
    padding-top: 0;
}
.titlebar ~ .app-shell .main-content {
    padding-top: calc(var(--topbar-height) + 36px);
}

/* Dashboard: full-width when sidebar is hidden */
.app-main--full {
    margin-left: 0 !important;
    width: 100% !important;
}

.app-main--full .main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 2.5rem;
}

/* Dashboard topbar: full bleed, content aligned with main column */
.app-main--full .app-topbar {
    left: 0;
    padding-left: max(2.5rem, calc((100% - 1000px) / 2 + 2.5rem));
    padding-right: max(2.5rem, calc((100% - 1000px) / 2 + 2.5rem));
}