/* ============================================================
   ALPHINIX — UI Components
   Spinners, Modals, Toasts, Dark Mode, Skeleton Loading
   ============================================================ */

/* ─── Loading Spinner ─── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--color-border, #E5E7EB);
    border-top-color: var(--color-primary, #0050FF);
    border-radius: 50%;
    animation: spin .6s linear infinite;
}
.spinner-lg {
    width: 2.5rem;
    height: 2.5rem;
    border-width: 3px;
}
.spinner-sm {
    width: .875rem;
    height: .875rem;
    border-width: 1.5px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Button loading state */
.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: .7;
}
.btn-loading::after {
    content: '';
    position: absolute;
    right: .625rem;
    top: 50%;
    transform: translateY(-50%);
    width: .875rem;
    height: .875rem;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
}

/* Full-page loading overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}
.loading-overlay .spinner {
    width: 3rem;
    height: 3rem;
    border-width: 3px;
}

/* ─── Skeleton Loading ─── */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm, 4px);
}
.skeleton-text {
    height: .875rem;
    margin-bottom: .5rem;
    width: 100%;
}
.skeleton-text:last-child {
    width: 60%;
}
.skeleton-title {
    height: 1.25rem;
    width: 40%;
    margin-bottom: .75rem;
}
.skeleton-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
}
.skeleton-card {
    height: 120px;
    border-radius: var(--radius-md, 8px);
}
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ─── Modal / Dialog ─── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(13, 27, 42, .5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease;
    backdrop-filter: blur(3px);
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.modal {
    background: var(--color-bg, #fff);
    border-radius: var(--radius-lg, 12px);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    transform: translateY(20px) scale(.97);
    transition: transform .25s ease;
}
.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border, #E5E7EB);
}
.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-dark, #0D1B2A);
}
.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-muted, #9CA3AF);
    padding: .25rem;
    line-height: 1;
    cursor: pointer;
    transition: color .15s;
}
.modal-close:hover {
    color: var(--color-danger, #EF4444);
}
.modal-body {
    padding: 1.5rem;
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: .75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border, #E5E7EB);
}
.modal-lg {
    max-width: 720px;
}

/* ─── Toast Notifications ─── */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    max-width: 380px;
}
.toast {
    background: var(--color-bg, #fff);
    border-radius: var(--radius-md, 8px);
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
    padding: .875rem 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    animation: toastSlideIn .3s ease;
    border-left: 3px solid var(--color-border, #E5E7EB);
    min-width: 280px;
}
.toast.toast-success { border-left-color: var(--color-success, #10B981); }
.toast.toast-error { border-left-color: var(--color-danger, #EF4444); }
.toast.toast-warning { border-left-color: var(--color-warning, #F59E0B); }
.toast.toast-info { border-left-color: var(--color-info, #3B82F6); }
.toast-icon {
    font-size: 1.125rem;
    flex-shrink: 0;
    margin-top: .1rem;
}
.toast-success .toast-icon { color: var(--color-success); }
.toast-error .toast-icon { color: var(--color-danger); }
.toast-warning .toast-icon { color: var(--color-warning); }
.toast-info .toast-icon { color: var(--color-info); }
.toast-content {
    flex: 1;
}
.toast-title {
    font-weight: 600;
    font-size: .875rem;
    margin-bottom: .125rem;
}
.toast-message {
    font-size: .8125rem;
    color: var(--color-slate, #4B5563);
    line-height: 1.5;
}
.toast-close {
    background: none;
    border: none;
    color: var(--color-muted, #9CA3AF);
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
    line-height: 1;
}
.toast-close:hover { color: var(--color-dark); }
.toast.hiding {
    animation: toastSlideOut .3s ease forwards;
}
@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes toastSlideOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(30px); }
}

/* ─── Tabs Component ─── */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-border, #E5E7EB);
    margin-bottom: 1.5rem;
}
.tab {
    padding: .75rem 1.25rem;
    font-size: .875rem;
    font-weight: 500;
    color: var(--color-muted, #9CA3AF);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all .15s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}
.tab:hover {
    color: var(--color-dark, #0D1B2A);
}
.tab.active {
    color: var(--color-primary, #0050FF);
    border-bottom-color: var(--color-primary, #0050FF);
    font-weight: 600;
}
.tab-panel {
    display: none;
}
.tab-panel.active {
    display: block;
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--color-muted, #9CA3AF);
}
.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: .5;
}
.empty-state-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-slate, #4B5563);
    margin-bottom: .5rem;
}
.empty-state-text {
    font-size: .875rem;
    margin-bottom: 1.5rem;
    max-width: 360px;
    margin-inline: auto;
}

.empty-state-compact {
    padding: 1.25rem;
}

.empty-inline-note {
    font-size: .875rem;
    color: var(--color-muted, #9CA3AF);
    text-align: center;
    padding: 1rem;
    border: 1px dashed var(--color-border, #E5E7EB);
    border-radius: var(--radius-md, 8px);
    background: var(--color-bg-alt, #F9FAFB);
}

/* ─── Filter Bar (Search-first standard) ─── */
.filter-panel {
    margin-bottom: 1rem;
    padding: 1rem;
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    align-items: flex-end;
}

.filter-group {
    margin: 0;
    min-width: 150px;
}

.filter-group.filter-grow {
    flex: 1;
    min-width: 220px;
}

.filter-group.filter-sm {
    min-width: 120px;
}

.filter-summary {
    font-size: .82rem;
    color: var(--color-muted, #9CA3AF);
    margin-top: .75rem;
}

@media (max-width: 768px) {
    .filter-group,
    .filter-group.filter-grow,
    .filter-group.filter-sm {
        width: 100%;
        min-width: 100%;
    }

    .filter-row .btn {
        width: auto;
    }
}

/* ─── Sticky Form Actions ─── */
.sticky-form-actions {
    position: sticky;
    bottom: .5rem;
    z-index: 5;
    display: flex;
    gap: .75rem;
    justify-content: flex-end;
    padding: .75rem;
    margin-top: 1rem;
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: var(--radius-md, 8px);
    background: color-mix(in srgb, var(--color-bg, #fff) 92%, transparent);
    backdrop-filter: blur(2px);
}

@media (max-width: 768px) {
    .sticky-form-actions {
        flex-wrap: wrap;
        justify-content: stretch;
    }

    .sticky-form-actions .btn {
        flex: 1 1 100%;
        justify-content: center;
    }
}

/* ─── Dropdown Menu ─── */
.dropdown {
    position: relative;
    display: inline-block;
}
.dropdown-menu {
    position: absolute;
    top: calc(100% + .25rem);
    right: 0;
    background: var(--color-bg, #fff);
    border: 1px solid var(--color-border, #E5E7EB);
    border-radius: var(--radius-md, 8px);
    box-shadow: var(--shadow-md);
    min-width: 180px;
    z-index: 50;
    display: none;
    padding: .375rem 0;
}
.dropdown.active .dropdown-menu {
    display: block;
}
.dropdown-item {
    display: block;
    padding: .5rem 1rem;
    font-size: .875rem;
    color: var(--color-slate, #4B5563);
    cursor: pointer;
    transition: background .1s;
}
.dropdown-item:hover {
    background: var(--color-bg-alt, #F9FAFB);
    color: var(--color-dark, #0D1B2A);
}
.dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: .375rem 0;
}

/* ─── Tooltips ─── */
[data-tooltip] {
    position: relative;
}
[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + .5rem);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-dark, #0D1B2A);
    color: #fff;
    padding: .375rem .75rem;
    border-radius: var(--radius-sm, 4px);
    font-size: .75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity .15s;
    z-index: 100;
}
[data-tooltip]:hover::after {
    opacity: 1;
}

/* ─── Progress Bar ─── */
.progress {
    height: .5rem;
    background: var(--color-bg-alt, #F0F0F0);
    border-radius: 999px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: var(--color-primary, #0050FF);
    border-radius: 999px;
    transition: width .4s ease;
}
.progress-bar-success { background: var(--color-success, #10B981); }
.progress-bar-warning { background: var(--color-warning, #F59E0B); }
.progress-bar-danger { background: var(--color-danger, #EF4444); }

/* ─── Chip / Tag ─── */
.chip {
    display: inline-flex;
    align-items: center;
    gap: .375rem;
    padding: .25rem .75rem;
    font-size: .75rem;
    font-weight: 500;
    border-radius: 999px;
    background: var(--color-bg-alt, #F3F4F6);
    color: var(--color-slate, #4B5563);
}
.chip-primary { background: var(--color-primary-l); color: var(--color-primary); }
.chip-success { background: #D1FAE5; color: #059669; }
.chip-warning { background: #FEF3C7; color: #D97706; }
.chip-danger { background: #FEE2E2; color: #DC2626; }

/* ─── Avatar ─── */
.avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    object-fit: cover;
    background: var(--color-primary-l, #EBF0FF);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: .875rem;
    color: var(--color-primary, #0050FF);
    flex-shrink: 0;
}
.avatar-sm { width: 2rem; height: 2rem; font-size: .75rem; }
.avatar-lg { width: 3.5rem; height: 3.5rem; font-size: 1.125rem; }
.avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

/* ─── Status Dot ─── */
.status-dot {
    width: .5rem;
    height: .5rem;
    border-radius: 50%;
    display: inline-block;
    margin-right: .375rem;
}
.status-dot-success { background: var(--color-success); }
.status-dot-warning { background: var(--color-warning); }
.status-dot-danger { background: var(--color-danger); }
.status-dot-muted { background: var(--color-muted); }

/* ============================================================
   DARK MODE
   ============================================================ */
[data-theme="dark"] {
    --color-bg:         #0F172A;
    --color-bg-alt:     #1E293B;
    --color-dark:       #F1F5F9;
    --color-dark-2:     #E2E8F0;
    --color-slate:      #CBD5E1;
    --color-muted:      #64748B;
    --color-border:     #334155;
    --color-primary-l:  #1E2A4A;
}

/* Dark mode — sidebar, cards, inputs */
[data-theme="dark"] .sidebar {
    background: #0B1120;
}
[data-theme="dark"] .dash-card,
[data-theme="dark"] .kpi-card {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .table th {
    background: #1E293B;
    color: #CBD5E1;
}
[data-theme="dark"] .table td {
    border-color: #334155;
    color: #E2E8F0;
}
[data-theme="dark"] .table tr:hover td {
    background: rgba(255,255,255,.03);
}
[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
    background: #1E293B;
    border-color: #334155;
    color: #F1F5F9;
}
[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,80,255,.15);
}
[data-theme="dark"] .alert {
    border-color: #334155;
}
[data-theme="dark"] .alert-success { background: #064E3B; color: #A7F3D0; }
[data-theme="dark"] .alert-error { background: #7F1D1D; color: #FECACA; }
[data-theme="dark"] .alert-warning { background: #78350F; color: #FDE68A; }
[data-theme="dark"] .badge {
    border-color: #334155;
}
[data-theme="dark"] .modal {
    background: #1E293B;
    border: 1px solid #334155;
}
[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: #334155;
}
[data-theme="dark"] .toast {
    background: #1E293B;
    box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #1E293B 25%, #334155 50%, #1E293B 75%);
    background-size: 200% 100%;
}
[data-theme="dark"] .page-header {
    border-color: #334155;
}
[data-theme="dark"] .dropdown-menu {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .dropdown-item:hover {
    background: #334155;
}
[data-theme="dark"] .loading-overlay {
    background: rgba(15, 23, 42, .85);
}
[data-theme="dark"] .progress {
    background: #334155;
}
[data-theme="dark"] .chip {
    background: #334155;
    color: #CBD5E1;
}

/* Dark mode — status chips (semantic colors) */
[data-theme="dark"] .chip-active,
[data-theme="dark"] .chip-approved {
    background: #064E3B;
    color: #6EE7B7;
    border-color: #065F46;
}
[data-theme="dark"] .chip-inactive,
[data-theme="dark"] .chip-rejected {
    background: #7F1D1D;
    color: #FCA5A5;
    border-color: #991B1B;
}
[data-theme="dark"] .chip-pending,
[data-theme="dark"] .chip-resubmit {
    background: #78350F;
    color: #FCD34D;
    border-color: #92400E;
}
[data-theme="dark"] .chip-upcoming,
[data-theme="dark"] .chip-online {
    background: #1E2A4A;
    color: #93C5FD;
    border-color: #1E3A5F;
}
[data-theme="dark"] .chip-completed {
    background: #334155;
    color: #CBD5E1;
    border-color: #475569;
}
[data-theme="dark"] .chip-offline {
    background: #422006;
    color: #FDE68A;
    border-color: #713F12;
}
[data-theme="dark"] .chip-submitted {
    background: #0C4A6E;
    color: #7DD3FC;
    border-color: #075985;
}

/* Dark mode — dashboard layout elements */
[data-theme="dark"] .dash-wrap {
    background: #0F172A;
}
[data-theme="dark"] .topbar {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .topbar-notif-dot {
    border-color: #1E293B;
}
[data-theme="dark"] .topbar-icon-btn {
    border-color: #334155;
    color: #CBD5E1;
}
[data-theme="dark"] .topbar-icon-btn:hover {
    background: #334155;
}
[data-theme="dark"] .page-content {
    background: #0F172A;
}
[data-theme="dark"] .btn-action {
    background: #1E293B;
    border-color: #334155;
    color: #CBD5E1;
}
[data-theme="dark"] .btn-action:hover {
    background: #1E2A4A;
    border-color: #0050FF;
    color: #93C5FD;
}
[data-theme="dark"] .btn-action.danger:hover {
    background: #3B1111;
    border-color: #EF4444;
    color: #FCA5A5;
}
[data-theme="dark"] .progress-wrap {
    background: #334155;
}
[data-theme="dark"] .search-input {
    background: #1E293B;
    border-color: #334155;
    color: #F1F5F9;
}
[data-theme="dark"] .search-input:focus {
    border-color: #0050FF;
}
[data-theme="dark"] .empty-state svg {
    color: #475569;
}
[data-theme="dark"] .empty-state h3 {
    color: #F1F5F9;
}
[data-theme="dark"] .empty-state p {
    color: #94A3B8;
}

/* Dark mode — student dashboard */
[data-theme="dark"] .student-focus-section {
    background: linear-gradient(180deg, #1E293B 0%, #0F172A 100%);
    border-color: #334155;
}
[data-theme="dark"] .student-notification-list li.is-unread {
    background: #1E2A4A;
}
[data-theme="dark"] .student-focus-goal input {
    background: #1E293B;
    border-color: #334155;
    color: #F1F5F9;
}
[data-theme="dark"] .student-notification-list li {
    border-color: #334155;
}

/* Dark mode — cards, badges, pagination */
[data-theme="dark"] .card {
    background: #1E293B;
    border-color: #334155;
}
[data-theme="dark"] .card-icon {
    background: #1E2A4A;
}
[data-theme="dark"] .badge-primary {
    background: #1E2A4A;
    color: #93C5FD;
}
[data-theme="dark"] .badge-success {
    background: #064E3B;
    color: #6EE7B7;
}
[data-theme="dark"] .badge-warning {
    background: #78350F;
    color: #FCD34D;
}
[data-theme="dark"] .badge-danger {
    background: #7F1D1D;
    color: #FCA5A5;
}
[data-theme="dark"] .pagination a,
[data-theme="dark"] .pagination span {
    border-color: #334155;
    color: #CBD5E1;
}
[data-theme="dark"] .pagination a:hover {
    border-color: #0050FF;
    color: #93C5FD;
}

/* Dark mode — alerts */
[data-theme="dark"] .alert-info {
    background: #1E2A4A;
    border-color: #3B82F6;
    color: #93C5FD;
}

/* Dark mode — table-wrap */
[data-theme="dark"] .table-wrap {
    border-color: #334155;
}
[data-theme="dark"] .table-wrap.inner-scroll {
    border-color: #334155;
}
[data-theme="dark"] .table-wrap.inner-scroll thead th {
    background: #1E293B;
}

/* Dark mode — navbar (public pages) */
[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, .95);
    border-color: #334155;
}
[data-theme="dark"] .navbar-nav li a:hover,
[data-theme="dark"] .navbar-nav li a.active {
    background: #334155;
}
[data-theme="dark"] .footer {
    background: #020617;
}

/* ============================================================
   DARK MODE — View-level inline style overrides (!important)
   These override hardcoded inline style="" colors in PHP views
   ============================================================ */

/* --- Card headers with inline background:#FAFBFC / #F9FAFB --- */
[data-theme="dark"] .dash-card-header {
    background: #1E293B !important;
    border-color: #334155 !important;
    color: #F1F5F9 !important;
}

/* --- Staff dashboard view --- */
[data-theme="dark"] .staff-action-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .staff-action-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,.3) !important;
}
[data-theme="dark"] .staff-action-label {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .staff-action-desc {
    color: #94A3B8 !important;
}
[data-theme="dark"] .staff-subm-card {
    border-color: #334155 !important;
}
[data-theme="dark"] .staff-subm-card:hover {
    background: rgba(255,255,255,.04) !important;
}
[data-theme="dark"] .staff-task-item {
    border-color: #334155 !important;
}
[data-theme="dark"] .staff-task-item:hover {
    background: rgba(255,255,255,.04) !important;
}
[data-theme="dark"] .staff-hero {
    background: linear-gradient(135deg, #0B1120 0%, #111D35 50%, #0F2440 100%) !important;
}

/* --- Navbar dark mode --- */
[data-theme="dark"] .navbar {
    background: rgba(15,23,42,.95) !important;
    border-bottom-color: rgba(51,65,85,.45) !important;
}
[data-theme="dark"] .navbar-logo-img { filter: brightness(0) invert(1); }
[data-theme="dark"] .navbar-nav > li > a { color: #94A3B8 !important; }
[data-theme="dark"] .navbar-nav > li > a:hover { color: #E2E8F0 !important; background: rgba(255,255,255,.06) !important; }
[data-theme="dark"] .navbar-nav > li > a.active { color: #60A5FA !important; background: transparent !important; }
[data-theme="dark"] .navbar-nav > li > a.active::after { background: #60A5FA !important; }
[data-theme="dark"] .nav-trigger { color: #94A3B8 !important; }
[data-theme="dark"] .nav-trigger:hover { color: #E2E8F0 !important; background: rgba(255,255,255,.06) !important; }
[data-theme="dark"] .nav-trigger.active { color: #60A5FA !important; }
[data-theme="dark"] .nav-trigger.active::after { background: #60A5FA !important; }
[data-theme="dark"] .navbar-toggle { color: #E2E8F0 !important; }
/* Mega menu dark */
[data-theme="dark"] .mega-panel {
    background: #0F172A !important;
    border-top-color: rgba(51,65,85,.45) !important;
    box-shadow: 0 16px 48px rgba(0,0,0,.4), 0 2px 6px rgba(0,0,0,.2) !important;
}
[data-theme="dark"] .mega-col { border-right-color: rgba(51,65,85,.35) !important; }
[data-theme="dark"] .mega-title { color: #60A5FA !important; }
[data-theme="dark"] .mega-desc { color: #94A3B8 !important; }
[data-theme="dark"] .mega-item:hover { background: rgba(255,255,255,.04) !important; }
[data-theme="dark"] .mega-item strong { color: #E2E8F0 !important; }
[data-theme="dark"] .mega-item span { color: #64748B !important; }
[data-theme="dark"] .mega-item-icon { background: rgba(96,165,250,.12) !important; color: #60A5FA !important; }
[data-theme="dark"] .mega-card { background: #1E293B !important; }
[data-theme="dark"] .mega-card strong { color: #E2E8F0 !important; }
[data-theme="dark"] .mega-card .mega-card-label { color: #60A5FA !important; }
@media (max-width: 768px) {
    [data-theme="dark"] .navbar { background: #0F172A !important; backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
    [data-theme="dark"] .navbar-nav.open {
        background: #0F172A !important;
        border-color: #334155 !important;
        box-shadow: 0 12px 32px rgba(0,0,0,.5) !important;
    }
    [data-theme="dark"] .navbar-nav.open > li > a.active,
    [data-theme="dark"] .navbar-nav.open .nav-trigger.active {
        background: rgba(96,165,250,.1) !important;
    }
    [data-theme="dark"] .mega-panel {
        box-shadow: none !important;
        border: none !important;
    }
    [data-theme="dark"] .mega-col:first-child {
        background: rgba(96,165,250,.05) !important;
    }
    [data-theme="dark"] .nav-mobile-extras a { color: #94A3B8 !important; }
    [data-theme="dark"] .nav-mobile-extras a:hover { background: rgba(255,255,255,.04) !important; color: #E2E8F0 !important; }
    [data-theme="dark"] .nav-mobile-auth { border-top-color: #334155 !important; }
}

/* --- Explore overlay dark mode --- */
[data-theme="dark"] .btn-explore { border-color: #334155; color: #CBD5E1; }
[data-theme="dark"] .btn-explore:hover { background: rgba(96,165,250,.15); color: #60A5FA; border-color: #60A5FA; }
[data-theme="dark"] .btn-explore.active { background: #2563EB; color: #fff; border-color: #2563EB; }
[data-theme="dark"] .explore-panel { background: linear-gradient(160deg, #0B1120 0%, #0F172A 40%, #0B1428 100%); }
[data-theme="dark"] .explore-panel::before { background-image: radial-gradient(circle at 1px 1px, rgba(96,165,250,.04) 1px, transparent 0); }
[data-theme="dark"] .explore-panel::after { background: radial-gradient(circle, rgba(59,130,246,.08) 0%, transparent 70%); }
[data-theme="dark"] .explore-header { background: linear-gradient(135deg, rgba(11,17,32,.97), rgba(15,23,42,.97)); border-bottom-color: rgba(59,130,246,.08); }
[data-theme="dark"] .explore-title { color: #F1F5F9; }
[data-theme="dark"] .explore-title::after { background: #3B82F6; }
[data-theme="dark"] .explore-close { background: #1E293B; color: #94A3B8; border-color: #334155; }
[data-theme="dark"] .explore-close:hover { background: rgba(239,68,68,.15); color: #F87171; border-color: rgba(239,68,68,.2); }
[data-theme="dark"] .explore-section-title { color: #60A5FA; border-bottom-color: rgba(59,130,246,.1); }
[data-theme="dark"] .explore-card { border-color: #1E293B; background: rgba(15,23,42,.6); backdrop-filter: blur(4px); }
[data-theme="dark"] .explore-card:hover { border-color: rgba(59,130,246,.3); background: rgba(59,130,246,.08); box-shadow: 0 8px 32px rgba(59,130,246,.12), 0 2px 8px rgba(0,0,0,.2); }
[data-theme="dark"] .explore-card::before { background: #60A5FA; }
[data-theme="dark"] .explore-card-icon { box-shadow: 0 2px 8px rgba(0,0,0,.2); }
[data-theme="dark"] .explore-card strong { color: #F1F5F9; }
[data-theme="dark"] .explore-card span { color: #64748B; }

/* --- KPI section overrides --- */
[data-theme="dark"] .kpi-card .kpi-value {
    color: #F1F5F9;
}
[data-theme="dark"] .kpi-card .kpi-label {
    color: #94A3B8;
}

/* --- Common inline backgrounds used across views --- */
[data-theme="dark"] .dash-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}

/* --- Admin report student view --- */
[data-theme="dark"] .sr-stat {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .sr-stat-val {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .sr-stat-lbl {
    color: #94A3B8 !important;
}
[data-theme="dark"] .sr-section {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .sr-section-head {
    background: #1E293B !important;
    border-color: #334155 !important;
    color: #F1F5F9 !important;
}
[data-theme="dark"] .sr-bar-bg {
    background: #334155 !important;
}

/* --- Student task views --- */
[data-theme="dark"] .tk-stat-icon {
    background: #1E2A4A !important;
}
[data-theme="dark"] .tk-stat-value {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .tk-empty-icon {
    background: #1E2A4A !important;
}

/* --- Student courses view (mc- prefix classes) --- */
[data-theme="dark"] .mc-batch-bar {
    background: #0B1120 !important;
}
[data-theme="dark"] .mc-course-select {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .mc-course-select-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mc-course-select-sub {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mc-course-search {
    color: #F1F5F9 !important;
    background: #0F172A !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .mc-course-search:focus {
    border-color: #3B82F6 !important;
    box-shadow: 0 0 0 3px rgba(59,130,246,.2) !important;
}
[data-theme="dark"] .mc-course-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .mc-course-card:hover {
    border-color: #3B82F6 !important;
    box-shadow: 0 4px 14px rgba(37,99,235,.15) !important;
}
[data-theme="dark"] .mc-course-card.selected {
    border-color: #2563EB !important;
    background: #1E2A4A !important;
}
[data-theme="dark"] .mc-course-icon {
    background: #1E2A4A !important;
}
[data-theme="dark"] .mc-course-card.selected .mc-course-icon {
    background: #1E3A5F !important;
}
[data-theme="dark"] .mc-course-card-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mc-course-card-meta {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mc-viewer {
    background: #1E293B !important;
    box-shadow: 0 2px 12px rgba(0,0,0,.2) !important;
}
[data-theme="dark"] .mc-sidebar {
    background: #162032 !important;
}
[data-theme="dark"] .mc-mod-list::-webkit-scrollbar-thumb {
    background: #475569 !important;
}
[data-theme="dark"] .mc-mod-item {
    color: #CBD5E1 !important;
}
[data-theme="dark"] .mc-mod-item:hover {
    background: #1E2A4A !important;
    color: #93C5FD !important;
}
[data-theme="dark"] .mc-mod-item.active {
    background: #1E2A4A !important;
    border-left-color: #2563EB !important;
}
[data-theme="dark"] .mc-mod-num {
    background: #475569 !important;
    color: #CBD5E1 !important;
}
[data-theme="dark"] .mc-mod-item.active .mc-mod-num {
    background: #2563EB !important;
    color: #fff !important;
}
[data-theme="dark"] .mc-mod-title {
    color: #E2E8F0 !important;
}
[data-theme="dark"] .mc-mod-item.active .mc-mod-title {
    color: #93C5FD !important;
}
[data-theme="dark"] .mc-mod-vc {
    color: #64748B !important;
}
[data-theme="dark"] .mc-crumb {
    color: #94A3B8 !important;
    background: #1E293B !important;
}
[data-theme="dark"] .mc-crumb b {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mc-vid-col::-webkit-scrollbar-thumb {
    background: #475569 !important;
}
[data-theme="dark"] .mc-stage {
    background: #0B1120 !important;
}
[data-theme="dark"] .mc-vid-meta {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mc-vid-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mc-vid-src {
    color: #64748B !important;
}
[data-theme="dark"] .mc-notes-section-head {
    color: #64748B !important;
}
[data-theme="dark"] .mc-notes-toggle {
    background: #1E2A4A !important;
    color: #93C5FD !important;
}
[data-theme="dark"] .mc-notes-toggle span {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mc-note-card {
    background: #162032 !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .mc-note-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mc-note-meta {
    color: #64748B !important;
}
[data-theme="dark"] .mc-note-btn-outline {
    background: #1E293B !important;
    color: #94A3B8 !important;
    border-color: #475569 !important;
}
[data-theme="dark"] .mc-note-btn-outline:hover {
    background: #1E2A4A !important;
}
[data-theme="dark"] .mc-playlist {
    background: #162032 !important;
}
[data-theme="dark"] .mc-pl-head {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mc-pl-scroll::-webkit-scrollbar-thumb {
    background: #475569 !important;
}
[data-theme="dark"] .mc-pl-item:hover {
    background: #1E2A4A !important;
}
[data-theme="dark"] .mc-pl-item.playing {
    background: #1E2A4A !important;
    border-left-color: #2563EB !important;
}
[data-theme="dark"] .mc-pl-n {
    background: #475569 !important;
    color: #CBD5E1 !important;
}
[data-theme="dark"] .mc-pl-item.playing .mc-pl-n {
    background: #2563EB !important;
    color: #fff !important;
}
[data-theme="dark"] .mc-pl-ttl {
    color: #E2E8F0 !important;
}
[data-theme="dark"] .mc-pl-item.playing .mc-pl-ttl {
    color: #93C5FD !important;
}
[data-theme="dark"] .mc-pl-prov {
    color: #64748B !important;
}
[data-theme="dark"] .mc-empty {
    color: #64748B !important;
}
[data-theme="dark"] .mc-empty h3 {
    color: #F1F5F9 !important;
}

/* --- Student courses list view (mcl- prefix) --- */
[data-theme="dark"] .mcl-batch-bar {
    background: #0B1120 !important;
}
[data-theme="dark"] .mcl-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .mcl-card:hover {
    border-color: #3B82F6 !important;
    box-shadow: 0 6px 18px rgba(37,99,235,.15) !important;
}
[data-theme="dark"] .mcl-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .mcl-meta {
    color: #94A3B8 !important;
}
[data-theme="dark"] .mcl-empty {
    background: #1E293B !important;
    border-color: #334155 !important;
    color: #94A3B8 !important;
}

/* --- Student courses show view (mcs- prefix) --- */
[data-theme="dark"] .mcs-back {
    color: #60A5FA !important;
}
[data-theme="dark"] .mcs-batch-bar {
    background: #0B1120 !important;
}
[data-theme="dark"] .mcs-viewer {
    background: #1E293B !important;
    box-shadow: 0 2px 12px rgba(0,0,0,.2) !important;
}
[data-theme="dark"] .mcs-sidebar {
    background: #162032 !important;
}
[data-theme="dark"] .mcs-mod-list::-webkit-scrollbar-thumb {
    background: #475569 !important;
}
[data-theme="dark"] .mcs-mod-item {
    color: #CBD5E1 !important;
}
[data-theme="dark"] .mcs-mod-item:hover {
    background: #1E2A4A !important;
    color: #93C5FD !important;
}
[data-theme="dark"] .mcs-mod-item.active {
    background: #1E2A4A !important;
    border-left-color: #2563EB !important;
}
[data-theme="dark"] .mcs-mod-num {
    background: #475569 !important;
    color: #CBD5E1 !important;
}
[data-theme="dark"] .mcs-mod-item.active .mcs-mod-num {
    background: #2563EB !important;
    color: #fff !important;
}
[data-theme="dark"] .mcs-mod-title {
    color: #E2E8F0 !important;
}
[data-theme="dark"] .mcs-mod-item.active .mcs-mod-title {
    color: #93C5FD !important;
}
[data-theme="dark"] .mcs-mod-vc {
    color: #64748B !important;
}
[data-theme="dark"] .mcs-mod-head {
    color: #94A3B8 !important;
}

/* --- Staff courses view (sc- prefix) --- */
[data-theme="dark"] .sc-item-btn.danger {
    background: #7F1D1D !important;
    color: #FCA5A5 !important;
}
[data-theme="dark"] .sc-item-btn.danger:hover {
    background: #991B1B !important;
}

/* --- Generic view-level overrides with !important --- */
/* Override any element with inline background:#fff / #FAFBFC / #F9FAFB in dark mode */
[data-theme="dark"] .dash-card > div[style*="background:#FAFBFC"],
[data-theme="dark"] .dash-card > div[style*="background: #FAFBFC"],
[data-theme="dark"] .dash-card > div[style*="background:#F9FAFB"],
[data-theme="dark"] .dash-card > div[style*="background: #F9FAFB"] {
    background: #1E293B !important;
}

/* Links with hardcoded blue color  — keep visible in dark mode */
[data-theme="dark"] a[style*="color:#0050FF"] {
    color: #60A5FA !important;
}

/* --- btn-secondary in dark mode --- */
[data-theme="dark"] .btn-secondary {
    background: #334155 !important;
    border-color: #475569 !important;
    color: #E2E8F0 !important;
}
[data-theme="dark"] .btn-secondary:hover {
    background: #475569 !important;
    color: #F1F5F9 !important;
}

/* --- btn-primary in dark mode — keep visible --- */
[data-theme="dark"] .btn-primary {
    color: #fff !important;
}

/* --- Page header overrides --- */
[data-theme="dark"] .page-header-title {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .page-header-sub {
    color: #94A3B8 !important;
}

/* --- Public pages --- */
[data-theme="dark"] .faq-btn {
    color: #F1F5F9 !important;
}
[data-theme="dark"] .faq-answer {
    color: #CBD5E1 !important;
}

/* --- Admin projects view --- */
[data-theme="dark"] .project-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}

/* --- Admin contacts view --- */
[data-theme="dark"] div[style*="background:#f9fafb"],
[data-theme="dark"] div[style*="background: #f9fafb"] {
    background: #1E293B !important;
    color: #CBD5E1 !important;
}
[data-theme="dark"] div[style*="background:#eff6ff"],
[data-theme="dark"] div[style*="background: #eff6ff"] {
    background: #1E2A4A !important;
    color: #93C5FD !important;
    border-color: #1E3A5F !important;
}

/* --- Admin testimonials --- */
[data-theme="dark"] div[style*="background:#e5e7eb"] {
    background: #475569 !important;
    color: #CBD5E1 !important;
}

/* --- Student profile edit --- */
[data-theme="dark"] input[style*="background:#f9fafb"],
[data-theme="dark"] input[style*="background: #f9fafb"] {
    background: #1E293B !important;
    color: #94A3B8 !important;
}

/* --- Student dashboard KPI icons with inline bg --- */
[data-theme="dark"] .kpi-icon[style] {
    opacity: .85;
}

/* --- Donut chart / SVG bg circles --- */
[data-theme="dark"] svg circle[stroke="#F3F4F6"] {
    stroke: #334155;
}
[data-theme="dark"] svg circle[stroke="#F1F5F9"] {
    stroke: #334155;
}

/* --- Task status cards in student tasks --- */
[data-theme="dark"] .tk-card {
    background: #1E293B !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .tk-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,.25) !important;
}
[data-theme="dark"] .tk-meta {
    color: #94A3B8 !important;
}
[data-theme="dark"] .tk-title {
    color: #F1F5F9 !important;
}

/* Dark mode toggle button */
.theme-toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: .5rem;
    cursor: pointer;
    color: var(--color-muted);
    font-size: 1.125rem;
    line-height: 1;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
}
.theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Ensure visibility in dark mode */
[data-theme="dark"] .theme-toggle {
    background: #0f172a;
    border-color: #1f2937;
    color: #e5e7eb;
}
[data-theme="dark"] .theme-toggle:hover {
    border-color: #22c55e;
    color: #22c55e;
}

/* ─── Responsive adjustments for new components ─── */
@media (max-width: 768px) {
    .toast-container {
        top: auto;
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: 100%;
    }
    .modal {
        width: 95%;
        margin: 1rem;
    }
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .tab {
        white-space: nowrap;
        flex-shrink: 0;
    }
}