/* CSS Variables for Theme Support */
:root {
    /* Light theme colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-sidebar: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-sidebar: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --nav-hover: #f1f5f9;
    --nav-active: rgba(37, 99, 235, 0.1);
    --nav-text: #64748b;
    --nav-text-hover: #1e293b;
    --nav-text-active: var(--primary-color);

    /* Layout */
    --header-height: 60px;
    --sidebar-width: 260px;
    --sidebar-width-collapsed: 80px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --smooth-hover: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark theme */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #fbbf24;
    --error-color: #f87171;
    --info-color: #60a5fa;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-sidebar: #0a0f1e;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --border-sidebar: #1e293b;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --nav-hover: #1e293b;
    --nav-active: rgba(59, 130, 246, 0.15);
    --nav-text: #94a3b8;
    --nav-text-hover: #f8fafc;
    --nav-text-active: var(--primary-color);
}

/* Dark theme specific enhancements */
[data-theme="dark"] .card {
    background-color: #0f172a;
    border-color: #1e293b;
}

[data-theme="dark"] .card:hover {
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

[data-theme="dark"] .btn-primary {
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
    background-color: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
    background-color: #0f172a;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .table th {
    background-color: #1e293b;
}

[data-theme="dark"] .table tbody tr:hover {
    background-color: #1e293b;
}

[data-theme="dark"] .badge-success {
    background-color: rgba(16, 185, 129, 0.2);
}

[data-theme="dark"] .badge-warning {
    background-color: rgba(251, 191, 36, 0.2);
}

[data-theme="dark"] .badge-error {
    background-color: rgba(248, 113, 113, 0.2);
}

[data-theme="dark"] .badge-info {
    background-color: rgba(96, 165, 250, 0.2);
}

[data-theme="dark"] .progress {
    background-color: #1e293b;
}

[data-theme="dark"] .flash-message {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .user-menu-dropdown,
[data-theme="dark"] .theme-menu-dropdown {
    background-color: #0f172a;
    border-color: #1e293b;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .nav-link.active {
    /* Removed box shadow to match new design */
}

[data-theme="dark"] .btn-secondary {
    background-color: #1e293b;
    border-color: #334155;
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: #334155;
    border-color: #475569;
}

[data-theme="dark"] .spinner {
    border-color: #334155;
    border-top-color: #3b82f6;
}

/* Scrollbar styling for dark theme */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #1e293b;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Selection color for dark theme */
[data-theme="dark"] ::selection {
    background-color: rgba(59, 130, 246, 0.3);
    color: #f8fafc;
}

/* Focus visible for dark theme */
[data-theme="dark"] *:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Smooth theme transitions */
* {
    transition-property: background-color, border-color, color, box-shadow;
    transition-duration: 0.3s;
    transition-timing-function: ease;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh; /* Fallback for older browsers */
    min-height: 100dvh;
}

.main-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Header */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    padding-left: calc(var(--sidebar-width) + 1.5rem);
    box-shadow: 0 1px 3px var(--shadow-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar.collapsed~.main-content .header {
    padding-left: calc(var(--sidebar-width-collapsed) + 1.5rem);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.menu-toggle:hover {
    background-color: var(--bg-tertiary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.user-menu-toggle:hover {
    background-color: var(--bg-tertiary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 40px var(--shadow-color);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
    overflow: hidden;
}

.user-menu.active .user-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-dropdown a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.875rem;
}

.user-menu-dropdown a i {
    width: 18px;
    text-align: center;
    color: var(--text-secondary);
}

.user-menu-dropdown a:hover {
    background-color: var(--bg-tertiary);
}

.user-menu-dropdown a:hover i {
    color: var(--primary-color);
}


/* Theme Menu */
.theme-menu {
    position: relative;
}

.theme-menu-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.125rem;
    cursor: pointer;
    padding: 0.625rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.theme-menu-toggle:hover {
    background-color: var(--bg-tertiary);
}

.theme-menu-toggle:active {
    transform: scale(0.95);
}

.theme-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 40px var(--shadow-color);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
    overflow: hidden;
}

.theme-menu.active .theme-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-menu-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.theme-menu-header i {
    color: var(--primary-color);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    position: relative;
}

.theme-option i:first-child {
    width: 18px;
    text-align: center;
    color: var(--text-secondary);
}

.theme-option span {
    flex: 1;
}

.theme-option .theme-check {
    opacity: 0;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.theme-option.active .theme-check {
    opacity: 1;
}

.theme-option:hover {
    background-color: var(--bg-tertiary);
}

.theme-option:hover i:first-child {
    color: var(--primary-color);
}

/* Profile Manager */
.profile-manager {
    position: relative;
}

.profile-manager-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition);
    padding: 0;
}

.profile-manager-toggle:hover {
    background-color: var(--bg-tertiary);
}

.profile-avatar {
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    border: 2px solid var(--bg-primary);
    transition: var(--transition);
}

.profile-manager-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--shadow-color);
    min-width: 320px;
    max-width: 400px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
    overflow: hidden;
}

.profile-manager.active .profile-manager-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.profile-main-avatar {
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
    flex-shrink: 0;
    border: 3px solid var(--bg-primary);
}

.profile-info {
    flex: 1;
    min-width: 0;
}

.profile-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.profile-email {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.profile-active-account {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 500;
}

.profile-active-account i {
    font-size: 0.75rem;
}

.profile-section {
    border-bottom: 1px solid var(--border-color);
}

.profile-section:last-of-type {
    border-bottom: none;
}

.profile-section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.profile-section-header i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.profile-account-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.5rem;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.profile-account-option:hover {
    background-color: var(--bg-tertiary);
}

.profile-account-avatar {
    width: 36px;
    height: 36px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.profile-account-details {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.profile-account-name {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-account-username {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-action {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.5rem;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    text-decoration: none;
}

.profile-action:hover {
    background-color: var(--bg-tertiary);
}

.profile-action i {
    width: 18px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.profile-action:hover i {
    color: var(--primary-color);
}

.profile-action-danger {
    color: var(--error-color);
}

.profile-action-danger i {
    color: var(--error-color);
}

.profile-action-danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

.profile-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.profile-settings-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.profile-settings-link:hover {
    color: var(--primary-color);
}

.profile-settings-link i {
    font-size: 0.875rem;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--shadow-color);
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.modal-close:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-content .form-group {
    margin-bottom: 1rem;
    padding: 0 1.5rem;
}

.modal-content .form-group:first-of-type {
    margin-top: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    justify-content: flex-end;
}

.modal-actions button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.modal-actions button[type="button"] {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-actions button[type="submit"] {
    background-color: var(--primary-color);
    color: white;
}

.modal-actions button:hover {
    transform: translateY(-1px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sidebar.collapsed .sidebar-bottom {
    padding: 0;
}

.sidebar.collapsed .sidebar-profile {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    padding: 0;
    margin: 0;
    gap: 1rem;
    width: 100%;
}

.sidebar.collapsed .profile-info {
    justify-content: center;
}

.sidebar.collapsed .user-name {
    display: none;
}

.sidebar.collapsed .nav-link span {
    display: none;
}

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

.sidebar.collapsed .nav-link {
    justify-content: center;
}

.sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
}

/* Modern Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    height: 100vh; /* Fallback */
    height: 100dvh;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
    border-right: 1px solid var(--border-sidebar);
    box-shadow: 2px 0 8px var(--shadow-color);
}

.sidebar-header {
    padding: 0.5rem 1rem; /* reduced top and bottom padding to utilize space efficiently */
    border-bottom: none;
}

.sidebar .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: flex-start; /* left-aligned */
    width: 100%;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar .logo-image {
    flex-shrink: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar .logo-expanded {
    width: 65%; /* reduced size */
    max-width: 140px;
    height: auto;
    display: block;
}

.sidebar .logo-collapsed {
    display: none;
}

.sidebar .logo-text {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-nav {
    padding: 1rem 0;
    flex-grow: 1;
    overflow-y: auto;
}

.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.nav-item {
    margin-bottom: 0.25rem;
    padding: 0 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--nav-text);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
}

.nav-link:hover {
    background-color: var(--nav-hover);
    color: var(--nav-text-hover);
}

.nav-link.active {
    background-color: var(--nav-active);
    color: var(--nav-text-active);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    height: 60%;
    width: 4px;
    background-color: var(--primary-color);
    border-radius: 0 4px 4px 0;
}

.nav-icon {
    font-size: 1.125rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

svg.nav-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
    display: inline-block;
    vertical-align: middle;
}

.nav-text {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Submenu Styles */
.nav-item.has-submenu>.nav-link {
    position: relative;
}

.submenu-arrow {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-item.has-submenu.open>.nav-link .submenu-arrow {
    transform: rotate(180deg);
}

.submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding-left: 1rem;
    padding-top: 0.5rem;
}

.nav-item.has-submenu.open .submenu {
    max-height: 500px;
}

.submenu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    color: var(--nav-text);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.8125rem;
    margin-bottom: 0.5rem;
}

.submenu-link:hover {
    background-color: var(--nav-hover);
    color: var(--nav-text-hover);
}

.submenu-link.active {
    background-color: var(--nav-active);
    color: var(--nav-text-active);
}

.submenu-icon {
    font-size: 0.875rem;
    width: 16px;
    text-align: center;
    opacity: 0.8;
}

.sidebar.collapsed .submenu-arrow,
.sidebar.collapsed .submenu {
    display: none;
}

.sidebar-bottom {
    display: flex;
    flex-direction: column;
    padding-bottom: 1rem;
}

.sidebar-profile {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--bg-hover);
    margin: 0.5rem 1rem 0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar-profile:hover {
    background-color: var(--border-sidebar);
}

.profile-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.sidebar .user-avatar {
    width: 32px;
    height: 32px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-sidebar);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.user-name {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle:hover {
    background-color: var(--nav-hover);
    color: var(--text-primary);
}

.sidebar-toggle i {
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Collapsed Sidebar Styles */
.sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
}

.sidebar.collapsed .logo {
    justify-content: center;
}

.sidebar.collapsed .logo-expanded {
    display: none;
}

.sidebar.collapsed .logo-collapsed {
    display: block;
    height: 2.5rem; /* adjusted size */
    width: auto;
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .user-name,
.sidebar.collapsed .user-details {
    display: none;
}

.sidebar.collapsed .nav-item {
    padding: 0;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0;
    width: 48px;
    height: 48px;
    margin: 0 auto;
}

.sidebar.collapsed .user-profile {
    justify-content: center;
}

.sidebar.collapsed .sidebar-toggle {
    margin: 0 auto;
}

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

.sidebar.collapsed .sidebar-footer {
    justify-content: center;
    gap: 0.5rem;
}

/* Smooth transitions for text elements */
.logo-text,
.nav-text,
.user-name {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}


/* Main Content Area */
.content {
    flex: 1;
    padding: 2rem;
    padding-top: calc(var(--header-height) + 2rem);
    overflow-y: auto;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Cards */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 1px 3px var(--shadow-color);
    transition: var(--smooth-hover);
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 4px 16px var(--shadow-color);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

/* Grid System */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--text-muted);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-error {
    background-color: var(--error-color);
    color: white;
}

.btn-info {
    background-color: #0ea5e9;
    color: white;
    border: 1px solid transparent;
}

.btn-info:hover {
    background-color: #0284c7;
    transform: translateY(-1px);
}

[data-theme="dark"] .btn-info {
    background-color: #38bdf8;
    color: #0f172a;
}

[data-theme="dark"] .btn-info:hover {
    background-color: #7dd3fc;
    color: #0f172a;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-checkbox {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.form-checkbox:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* Flash Messages */
.flash-messages {
    position: fixed;
    top: var(--header-height);
    right: 1rem;
    z-index: 1000;
    max-width: 400px;
}

.flash-message {
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 500;
    opacity: 0;
    transform: translateX(100%);
    animation: slideIn 0.3s ease-out forwards;
}

.flash-message.success {
    background-color: var(--success-color);
}

.flash-message.error {
    background-color: var(--error-color);
}

.flash-message.warning {
    background-color: var(--warning-color);
}

.flash-message.info {
    background-color: var(--info-color);
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Progress Bars */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.6s ease;
    border-radius: 4px;
}

.progress-bar.success {
    background-color: var(--success-color);
}

.progress-bar.warning {
    background-color: var(--warning-color);
}

.progress-bar.error {
    background-color: var(--error-color);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.table th,
.table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.table tbody tr:hover {
    background-color: var(--bg-tertiary);
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Show hamburger menu */
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Header: full width, no sidebar offset */
    .header {
        padding: 0 1rem;
        padding-left: 1rem;
    }

    .sidebar.collapsed ~ .main-content .header {
        padding-left: 1rem;
    }

    /* Main content: no sidebar margin */
    .main-content {
        margin-left: 0;
    }

    .sidebar.collapsed ~ .main-content {
        margin-left: 0;
    }

    /* Sidebar: slide-in overlay from left */
    .sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        height: 100vh; /* Fallback */
        height: 100dvh;
        width: 280px;
        z-index: 1001;
        transition: left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: none;
    }

    .sidebar.active {
        left: 0;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.25);
    }

    /* Reset collapsed states on mobile */
    .sidebar.collapsed {
        width: 280px;
        left: -100%;
    }

    .sidebar.collapsed.active {
        left: 0;
    }

    .sidebar.collapsed .logo-text,
    .sidebar.collapsed .nav-text,
    .sidebar.collapsed .user-name {
        display: inline;
    }

    .sidebar.collapsed .nav-link {
        justify-content: flex-start;
        padding: 0.75rem 1rem;
    }

    .sidebar.collapsed .submenu-arrow,
    .sidebar.collapsed .submenu {
        display: block;
    }

    .sidebar.collapsed .sidebar-footer {
        justify-content: space-between;
    }

    .sidebar.collapsed .sidebar-toggle i {
        transform: none;
    }

    /* Content area adjustments */
    .content {
        padding: 1rem;
        padding-bottom: 1rem; top: auto;
    }

    /* Grid layouts: stack on tablets */
    .grid-cols-2,
    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Dropdowns: constrain to viewport */
    .user-menu-dropdown {
        right: -1rem;
        min-width: 180px;
    }

    .profile-manager-dropdown {
        right: -1rem;
        min-width: 280px;
        max-width: calc(100vw - 2rem);
    }

    .notification-dropdown {
        right: -2rem;
        width: calc(100vw - 2rem);
        max-width: 360px;
    }

    .theme-menu-dropdown {
        right: -1rem;
    }

    /* Page header stacking */
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Typography adjustments */
    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    h3 {
        font-size: 1.125rem;
    }

    /* Flash messages: full width */
    .flash-messages {
        right: 0.5rem;
        left: 0.5rem;
        max-width: none;
    }

    /* Loading overlay: responsive padding */
    .loading-card {
        padding: 2rem;
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .content {
        padding: 0.75rem;
        padding-top: calc(var(--header-height) + 0.75rem);
    }

    .card-header,
    .card-body {
        padding: 1rem;
    }

    /* Single column on small phones */
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    /* Full width buttons */
    .btn:not(.btn-sm) {
        width: 100%;
        justify-content: center;
    }

    /* Header simplification */
    .header-right {
        gap: 0.25rem;
    }

    .profile-manager-dropdown {
        right: -0.5rem;
        min-width: 260px;
    }

    .notification-dropdown {
        right: -3rem;
        width: calc(100vw - 1rem);
    }

    /* Modal: full width on small screens */
    .modal-content {
        width: 95%;
        margin: 0.5rem;
    }

    /* Sidebar: narrower on very small screens */
    .sidebar {
        width: 260px;
    }

    .sidebar.collapsed {
        width: 260px;
    }
}

/* Attendance Updates Section Styles */
.attendance-updates-section {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.attendance-updates-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #6366f1);
}

.attendance-updates-section.updates-section-positive::before {
    background: var(--success-color);
}

.attendance-updates-section.updates-section-warning::before {
    background: var(--warning-color);
}

.attendance-updates-section.updates-section-mixed::before {
    background: linear-gradient(90deg, var(--success-color), var(--warning-color), var(--error-color));
}

.attendance-updates-section.no-changes::before {
    background: var(--success-color);
}

.attendance-updates-section:hover {
    box-shadow: 0 4px 16px var(--shadow-color);
    transform: translateY(-1px);
}

.attendance-updates-section.collapsed {
    transform: none;
}

/* Updates Header */
.updates-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
    transition: background-color 0.2s ease;
}

.updates-header:hover {
    background-color: var(--bg-secondary);
}

.updates-header.clickable {
    cursor: pointer;
}

.updates-title-section {
    flex: 1;
}

.updates-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.updates-icon {
    font-size: 1.5rem;
}

.updates-summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.updates-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.summary-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.summary-badge.positive {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.summary-badge.negative {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.no-changes-message {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Updates Actions */
.updates-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border-radius: var(--border-radius);
    transition: var(--smooth-hover);
    cursor: pointer;
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Updates Toggle Button */
.updates-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.updates-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.updates-toggle i {
    font-size: 1rem;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.attendance-updates-section.collapsed .updates-toggle i {
    transform: rotate(180deg);
}

/* Updates Content */
.updates-content {
    padding: 0;
    transition: var(--transition);
    max-height: 1000px;
    overflow: hidden;
}

.updates-content.collapsed {
    max-height: 0;
    padding: 0;
}

/* Updates Groups */
.updates-group {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.updates-group:last-child {
    border-bottom: none;
}

.updates-group-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Simple Update Items */
.update-item-simple {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.update-item-simple:last-child {
    margin-bottom: 0;
}

.update-item-simple:hover {
    background-color: var(--bg-secondary);
    transform: translateX(2px);
}

/* Update Item Types */
.update-item-simple.update-present {
    background-color: rgba(16, 185, 129, 0.05);
    border-left-color: var(--success-color);
}

.update-item-simple.update-present:hover {
    background-color: rgba(16, 185, 129, 0.1);
}

.update-item-simple.update-absent {
    background-color: rgba(239, 68, 68, 0.05);
    border-left-color: var(--error-color);
}

.update-item-simple.update-absent:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

.update-item-simple.update-no-change {
    background-color: rgba(59, 130, 246, 0.05);
    border-left-color: var(--info-color);
}

.update-item-simple.update-no-change:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

.update-item-simple.update-neutral {
    background-color: rgba(100, 116, 139, 0.05);
    border-left-color: var(--secondary-color);
}

.update-item-simple.update-neutral:hover {
    background-color: rgba(100, 116, 139, 0.1);
}

.update-item-simple.update-system {
    background-color: rgba(245, 158, 11, 0.05);
    border-left-color: var(--warning-color);
}

.update-item-simple.update-system:hover {
    background-color: rgba(245, 158, 11, 0.1);
}

/* Change Icons and Messages */
.change-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.change-message {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
}

/* Always visible section */
.attendance-updates-always-visible {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.attendance-updates-always-visible::before {
    display: none;
}

/* Legacy Updates Content (keeping for backward compatibility) */
.updates-content {
    overflow: hidden;
    max-height: 1000px;
    transition: max-height 300ms cubic-bezier(0.32, 0.72, 0, 1), opacity 200ms cubic-bezier(0.23, 1, 0.32, 1);
}

.updates-content.collapsed {
    max-height: 0 !important;
    opacity: 0;
}

/* Update Items */
.update-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

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

.update-item:hover {
    background-color: var(--bg-secondary);
}

.update-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    transition: var(--transition);
}

/* Update Item Color Coding */
.update-item.change-positive::before {
    background-color: var(--success-color);
}

.update-item.change-negative::before {
    background-color: var(--error-color);
}

.update-item.change-neutral::before {
    background-color: var(--info-color);
}

.update-item.change-new-safe::before {
    background-color: var(--success-color);
}

.update-item.change-new-warning::before {
    background-color: var(--warning-color);
}

.update-item.change-new-danger::before {
    background-color: var(--error-color);
}

.update-item.change-removed::before {
    background-color: var(--warning-color);
}

/* Update Item Header */
.update-item-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1rem;
    gap: 1rem;
}

.course-info {
    flex: 1;
    min-width: 0;
}

.course-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.change-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.course-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    word-break: break-word;
}

.schedule-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    font-size: 0.625rem;
    font-weight: 500;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    flex-shrink: 0;
}

.schedule-badge.scheduled {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.schedule-badge.unscheduled {
    background-color: rgba(156, 163, 175, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(156, 163, 175, 0.2);
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.instructor {
    font-style: italic;
}

.change-summary {
    font-weight: 500;
    color: var(--text-primary);
}

/* Change Badges */
.change-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 16px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    flex-shrink: 0;
    border: 1px solid transparent;
}

.change-badge.positive {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.2);
}

.change-badge.negative {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border-color: rgba(239, 68, 68, 0.2);
}

.change-badge.neutral {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
    border-color: rgba(59, 130, 246, 0.2);
}

.change-badge.new-course {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.2);
}

.change-badge.new-course.warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-color: rgba(245, 158, 11, 0.2);
}

.change-badge.new-course.danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border-color: rgba(239, 68, 68, 0.2);
}

.change-badge.removed {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-color: rgba(245, 158, 11, 0.2);
}

/* Update Item Details */
.update-item-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.change-detail {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    flex-wrap: wrap;
}

.detail-label {
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 120px;
    flex-shrink: 0;
}

.detail-value {
    font-weight: 600;
    color: var(--text-primary);
}

.detail-difference {
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

.detail-difference.positive {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.detail-difference.negative {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.detail-difference.neutral {
    background-color: rgba(156, 163, 175, 0.1);
    color: var(--text-secondary);
}

.detail-percentage {
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

.detail-percentage.safe {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.detail-percentage.warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.detail-percentage.danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

/* New Course and Removed Course Details */
.new-course-details,
.removed-course-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Updates Footer */
.updates-footer {
    padding: 1rem 1.5rem;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.schedule-summary {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.schedule-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.schedule-stat i {
    color: var(--primary-color);
}

/* Animations */
@keyframes slideDown {
    from {
        max-height: 0;
        opacity: 0;
    }

    to {
        max-height: 1000px;
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        max-height: 1000px;
        opacity: 1;
    }

    to {
        max-height: 0;
        opacity: 0;
    }
}

.updates-content:not(.collapsed) {
    animation: slideDown 0.3s ease-out;
}

.updates-content.collapsed {
    animation: slideUp 0.3s ease-out;
}

/* Responsive Design for Updates Section */
@media (max-width: 768px) {
    .updates-header {
        padding: 1rem;
    }

    .update-item {
        padding: 1rem;
    }

    .update-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .course-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .course-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .change-detail {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .detail-label {
        min-width: auto;
    }

    .schedule-summary {
        flex-direction: column;
        gap: 0.75rem;
    }

    .updates-summary {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .updates-header {
        padding: 0.75rem;
    }

    .update-item {
        padding: 0.75rem;
    }

    .updates-title {
        font-size: 1.125rem;
    }

    .course-name {
        font-size: 0.875rem;
    }

    .change-badge {
        padding: 0.375rem 0.75rem;
        font-size: 0.625rem;
    }
}

/* Dark theme specific enhancements for updates section */
[data-theme="dark"] .attendance-updates-section {
    background-color: var(--bg-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .attendance-updates-section:hover {
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

[data-theme="dark"] .update-item:hover {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .updates-footer {
    background-color: var(--bg-tertiary);
}

/* Focus states for accessibility */
.updates-toggle:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .attendance-updates-section {
        border-width: 2px;
    }

    .update-item::before {
        width: 6px;
    }

    .change-badge,
    .summary-badge,
    .detail-difference,
    .detail-percentage {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {

    .attendance-updates-section,
    .update-item,
    .updates-toggle,
    .updates-content {
        transition: none;
    }

    .updates-content:not(.collapsed),
    .updates-content.collapsed {
        animation: none;
    }
}

/* Course Selection Bar - Premium Layout */
.course-selection-bar {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 1.5rem 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-color);
    position: relative;
    overflow: hidden;
}

.selection-item {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.375rem;
    flex: 1;
    min-width: 0;
    width: 100%;
}

.selection-label {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94a3b8;
    margin: 0;
    padding-left: 0.25rem;
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.selection-label i {
    font-size: 0.8125rem;
    margin-right: 0.375rem;
    color: var(--primary-color);
    opacity: 0.8;
}

.selection-dropdown {
    flex: 1;
    min-width: 0;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    padding: 0.625rem 2.5rem 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25em;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    outline: none;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.selection-dropdown:hover {
    /* border-color removed */
}

.selection-dropdown:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Empty State Styling - Enterprise Refined */
.empty-state-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    padding: 4rem 2rem;
    width: 100%;
    margin: 2rem auto;
    background: transparent;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    animation: fadeInEmpty 0.4s ease-out forwards;
    opacity: 0;
}

@keyframes fadeInEmpty {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.empty-state-content {
    text-align: center;
    max-width: 480px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.empty-state-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px var(--shadow-color);
}

.empty-state-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.empty-state-title {
    margin: 0 0 0.75rem 0;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.empty-state-message {
    margin: 0;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 400px;
}

/* Responsive design */
@media (max-width: 768px) {
    .course-selection-bar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .selection-item {
        width: 100%;
    }

    .selection-label {
        min-width: 70px;
    }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: var(--header-height);
    left: var(--sidebar-width);
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease-out;
}

/* When sidebar is collapsed */
.sidebar.collapsed ~ .main-content .loading-overlay {
    left: var(--sidebar-width-collapsed);
}

.loading-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    animation: slideUp 0.3s ease-out;
    min-width: 280px;
}

.loading-spinner {
    position: relative;
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

.spinner-ring:nth-child(1) {
    border-top-color: #3b82f6;
    animation-delay: 0s;
}

.spinner-ring:nth-child(2) {
    border-top-color: #8b5cf6;
    animation-delay: -0.5s;
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
}

.spinner-ring:nth-child(3) {
    border-top-color: #ec4899;
    animation-delay: -1s;
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
}

.loading-text {
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    margin: 0;
    letter-spacing: 0.02em;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

/* Responsive loading overlay */
@media (max-width: 768px) {
    .loading-overlay {
        left: 0;
    }
    
    .loading-card {
        padding: 1.5rem 2rem;
        min-width: 240px;
        margin: 0 1rem;
    }
    
    .loading-spinner {
        width: 40px;
        height: 40px;
    }
    
    .loading-text {
        font-size: 0.875rem;
    }
}

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Notification Banner */
.notification-banner {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10001;
    min-width: 320px;
    max-width: 420px;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideInRight 0.3s ease-out;
}

.notification-banner.notification-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.notification-banner.notification-error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification-icon {
    font-size: 1.5rem;
}

.notification-message {
    flex: 1;
    font-size: 0.9375rem;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Error State Styles for LMS */
.error-state-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem 1rem;
    min-height: 400px;
}

.error-state-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    padding: 2.5rem;
    max-width: 500px;
    width: 100%;
    text-align: center;
}

.error-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

.error-state-icon i {
    font-size: 2.5rem;
    color: var(--error-color);
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
}

.error-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.error-state-message {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.error-state-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.error-state-actions .btn {
    min-width: 140px;
}

.error-state-help {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
}

.error-state-help p {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.error-state-help ul {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--text-secondary);
}

.error-state-help li {
    margin-bottom: 0.25rem;
}

.error-state-help a {
    color: var(--primary-color);
    text-decoration: none;
}

.error-state-help a:hover {
    text-decoration: underline;
}

/* Dark theme adjustments for error state */
[data-theme="dark"] .error-state-icon {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(220, 38, 38, 0.2));
}

[data-theme="dark"] .error-state-help {
    background: var(--bg-tertiary);
}

/* ==========================================
   Notification Bell Styles
   ========================================== */
.notification-bell {
    position: relative;
}

.notification-bell-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
}

.notification-bell-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.5);
    animation: badge-pulse 2s infinite;
}

@keyframes badge-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.notification-dropdown {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    width: min(480px, calc(100vw - 1.5rem));
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18), 0 4px 16px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.97);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

/* Header */
.notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.125rem 1.25rem 1rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, #6366f1 100%);
    position: relative;
    overflow: hidden;
}

.notification-header::before {
    content: '';
    position: absolute;
    top: -30px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.07);
    border-radius: 50%;
}

.notification-header-left {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.notification-header-icon {
    width: 32px;
    height: 32px;
    background: rgba(255,255,255,0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: white;
    backdrop-filter: blur(4px);
}

.notification-header-title {
    font-weight: 700;
    color: white;
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
}

.notification-header-sub {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.7);
    margin-top: 1px;
}

.notification-mark-all {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    cursor: pointer;
    padding: 0.375rem 0.75rem;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    backdrop-filter: blur(4px);
    white-space: nowrap;
}

.notification-mark-all:hover {
    background: rgba(255,255,255,0.25);
}

/* List */
.notification-list {
    flex: 1;
    overflow-y: auto;
    max-height: 400px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.notification-list::-webkit-scrollbar {
    width: 4px;
}

.notification-list::-webkit-scrollbar-track {
    background: transparent;
}

.notification-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* Items */
.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.15s ease;
    position: relative;
    /* prevent any child from overflowing the row */
    overflow: hidden;
}

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

.notification-item:hover {
    background-color: var(--bg-secondary);
}

.notification-item.unread {
    background-color: rgba(59, 130, 246, 0.04);
}

.notification-item.unread::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: 0 2px 2px 0;
    background: var(--primary-color);
}

.notification-item.unread.type-overdue::before    { background: #ef4444; }
.notification-item.unread.type-due24h::before     { background: #f97316; }
.notification-item.unread.type-due3d::before      { background: #eab308; }
.notification-item.unread.type-new::before        { background: #10b981; }
.notification-item.unread.type-attendance::before { background: #f59e0b; }

/* Icon — matches dashboard summary-icon style */
.notification-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;   /* never shrink */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.notification-icon.type-overdue    { background-color: rgba(239, 68,  68,  0.12); color: #ef4444; }
.notification-icon.type-due24h     { background-color: rgba(249, 115, 22,  0.12); color: #f97316; }
.notification-icon.type-due3d      { background-color: rgba(234, 179, 8,   0.12); color: #ca8a04; }
.notification-icon.type-new        { background-color: rgba(16,  185, 129, 0.12); color: #10b981; }
.notification-icon.type-attendance { background-color: rgba(245, 158, 11,  0.12); color: #f59e0b; }
.notification-icon.type-system     { background-color: rgba(99,  102, 241, 0.12); color: #6366f1; }

/* Content */
.notification-content {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.notification-item-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.35;
    white-space: normal;
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notification-item-body {
    font-size: 0.775rem;
    color: var(--text-secondary);
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.notification-item-body {
    font-size: 0.775rem;
    color: var(--text-secondary);
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.notification-item-meta {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.2rem;
}

.notification-item-time {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.65;
}

.notification-unread-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
    flex-shrink: 0;
}

/* Empty / Loading */
.notification-loading,
.notification-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.notification-empty-icon {
    width: 52px;
    height: 52px;
    background: var(--bg-secondary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0.6;
}

.notification-loading i {
    font-size: 1.5rem;
    opacity: 0.4;
}

.notification-empty span,
.notification-loading span {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* Footer */
.notification-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    text-align: center;
}

.notification-footer a {
    font-size: 0.8rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    opacity: 0.85;
    transition: opacity 0.15s;
}

.notification-footer a:hover {
    opacity: 1;
    text-decoration: underline;
}

@media (max-width: 540px) {
    .notification-dropdown {
        /* anchor to the right edge of the viewport with a small margin */
        position: fixed;
        top: 60px;
        left: 0.75rem;
        right: 0.75rem;
        width: auto;
        border-radius: 16px;
        max-height: 80vh;
    }

    .notification-list {
        max-height: calc(80vh - 130px); /* header + footer */
    }

    .notification-header {
        padding: 1rem;
    }

    .notification-mark-all span {
        display: none; /* hide label text, keep icon */
    }

    .notification-item {
        padding: 0.75rem 1rem;
    }
}


/* ============================================
   Footer Styles
   ============================================ */

.app-footer {
    padding: 1.5rem 2rem;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 10;
}

.app-footer.unauthenticated {
    text-align: center;
    padding: 2rem;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-text {
    color: var(--text-secondary);
}

.footer-heart {
    color: #e74c3c;
    font-size: 1.2rem;
    display: inline-block;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(1.1);
    }
    20%, 40% {
        transform: scale(1);
    }
}







/* Social Modal Overlay */
.social-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.social-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Social Modal */
.social-modal {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 64px; /* pill shape */
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
    padding: 1rem 1.5rem;
    min-width: auto;
    max-width: 90vw;
    transform: scale(0.95) translateY(20px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-modal-overlay.active .social-modal {
    transform: scale(1) translateY(0);
}

.social-modal::before {
    display: none;
}

.social-card {
    display: none;
}

.social-card-header {
    display: none;
}

.social-card-close {
    display: none !important;
}

.social-links {
    display: flex;
    flex-direction: row;
    gap: 1.25rem;
    padding: 0;
    align-items: center;
    justify-content: center;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-radius: 50%;
    text-decoration: none;
    background: transparent;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: none;
    position: relative;
}

.social-link::before {
    display: none;
}

.social-link:hover {
    transform: translateY(-4px) scale(1.05);
}

.social-link i {
    font-size: 1.75rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    flex-shrink: 0;
}

.social-link span {
    display: none;
}

/* LinkedIn styling */
.social-link.linkedin i {
    background: rgba(0, 119, 181, 0.1);
    color: #0077b5;
}

.social-link.linkedin:hover i {
    background: #0077b5;
    color: white;
    box-shadow: 0 8px 24px rgba(0, 119, 181, 0.35);
}

/* Instagram styling */
.social-link.instagram i {
    background: rgba(228, 64, 95, 0.1);
    color: #E4405F;
}

.social-link.instagram:hover i {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
    box-shadow: 0 8px 24px rgba(228, 64, 95, 0.35);
}

/* Discord styling */
.social-link.discord i {
    background: rgba(88, 101, 242, 0.1);
    color: #5865F2;
}

.social-link.discord:hover i {
    background: #5865F2;
    color: white;
    box-shadow: 0 8px 24px rgba(88, 101, 242, 0.35);
}

/* Dark theme adjustments */
[data-theme="dark"] .social-modal {
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .social-link {
    background: transparent;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-footer {
        padding: 1rem;
    }
    
    .footer-content {
        font-size: 0.875rem;
    }
    
}

/* ============================================
   LMS Signal Strength Widget
   ============================================ */

.lms-signal-widget {
    position: relative;
    display: flex;
    align-items: center;
}

.lms-signal-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lms-signal-toggle:hover {
    background: var(--bg-secondary);
}

.signal-bars {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 20px;
    width: 20px;
}

.signal-bar {
    width: 4px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
    opacity: 0.3;
}

.signal-bar:nth-child(1) {
    height: 6px;
}

.signal-bar:nth-child(2) {
    height: 12px;
}

.signal-bar:nth-child(3) {
    height: 18px;
}

/* Signal strength states */
.signal-bars.signal-excellent .signal-bar {
    background: #10b981;
    opacity: 1;
}

.signal-bars.signal-good .signal-bar:nth-child(1),
.signal-bars.signal-good .signal-bar:nth-child(2) {
    background: #f59e0b;
    opacity: 1;
}

.signal-bars.signal-poor .signal-bar:nth-child(1) {
    background: #ef4444;
    opacity: 1;
}

.signal-bars.signal-offline .signal-bar {
    background: var(--text-muted);
    opacity: 0.3;
}

.signal-bars.signal-unknown .signal-bar {
    background: var(--text-muted);
    opacity: 0.3;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* Tooltip */
.lms-signal-tooltip {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px var(--shadow-color);
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

.lms-signal-widget.active .lms-signal-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.signal-tooltip-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 12px 12px 0 0;
}

.signal-tooltip-header i {
    color: var(--primary-color);
    font-size: 1rem;
}

.signal-tooltip-header span {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.signal-tooltip-content {
    padding: 1rem 1.25rem;
}

.signal-status-text {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.signal-response-time {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.signal-last-check {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Loading screen signal widget */
.lms-loading-signal {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-top: 1.5rem;
}

.lms-loading-signal .signal-bars {
    height: 24px;
    width: 24px;
    gap: 3px;
}

.lms-loading-signal .signal-bar {
    width: 5px;
}

.lms-loading-signal .signal-bar:nth-child(1) {
    height: 8px;
}

.lms-loading-signal .signal-bar:nth-child(2) {
    height: 16px;
}

.lms-loading-signal .signal-bar:nth-child(3) {
    height: 24px;
}

.lms-loading-signal-info {
    flex: 1;
}

.lms-loading-signal-status {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.lms-signal-widget {
    position: relative;
    display: flex;
    align-items: center;
}

.lms-signal-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lms-signal-toggle:hover {
    background: var(--bg-secondary);
}

.signal-bars {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 20px;
    width: 20px;
}

.signal-bar {
    width: 4px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
    opacity: 0.3;
}

.signal-bar:nth-child(1) {
    height: 6px;
}

.signal-bar:nth-child(2) {
    height: 12px;
}

.signal-bar:nth-child(3) {
    height: 18px;
}

/* Signal strength states */
.signal-bars.signal-excellent .signal-bar {
    background: #10b981;
    opacity: 1;
}

.signal-bars.signal-good .signal-bar:nth-child(1),
.signal-bars.signal-good .signal-bar:nth-child(2) {
    background: #f59e0b;
    opacity: 1;
}

.signal-bars.signal-poor .signal-bar:nth-child(1) {
    background: #ef4444;
    opacity: 1;
}

.signal-bars.signal-offline .signal-bar {
    background: var(--text-muted);
    opacity: 0.3;
}

.signal-bars.signal-unknown .signal-bar {
    background: var(--text-muted);
    opacity: 0.3;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* Tooltip */
.lms-signal-tooltip {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px var(--shadow-color);
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
}

.lms-signal-widget.active .lms-signal-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.signal-tooltip-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 12px 12px 0 0;
}

.signal-tooltip-header i {
    color: var(--primary-color);
    font-size: 1rem;
}

.signal-tooltip-header span {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.signal-tooltip-content {
    padding: 1rem 1.25rem;
}

.signal-status-text {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.signal-response-time {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.signal-last-check {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Loading screen signal widget */
.lms-loading-signal {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-top: 1.5rem;
}

.lms-loading-signal .signal-bars {
    height: 24px;
    width: 24px;
    gap: 3px;
}

.lms-loading-signal .signal-bar {
    width: 5px;
}

.lms-loading-signal .signal-bar:nth-child(1) {
    height: 8px;
}

.lms-loading-signal .signal-bar:nth-child(2) {
    height: 16px;
}

.lms-loading-signal .signal-bar:nth-child(3) {
    height: 24px;
}

.lms-loading-signal-info {
    flex: 1;
}

.lms-loading-signal-status {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.lms-loading-signal-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .lms-signal-tooltip {
        right: -0.5rem;
        min-width: 220px;
    }
    
    .lms-loading-signal {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
}

/* Fix mobile diagonal scrolling and lock sticky boundaries */
@media (max-width: 768px) {
    html, body {
        max-width: 100vw;
        position: relative;
    }
    .app-container, .main-content {
        overflow-x: hidden !important;
        max-width: 100vw;
    }
}

/* Sync Banner and Skeleton Loading Styles */
.sync-banner {
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 500;
    font-size: 0.95rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    animation: slideDown 0.4s ease-out forwards;
}


@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.sync-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

.skeleton {
    background: var(--bg-tertiary);
    background: linear-gradient(110deg, var(--bg-tertiary) 8%, var(--bg-secondary) 18%, var(--bg-tertiary) 33%);
    background-size: 200% 100%;
    animation: shimmer 1.5s linear infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    to {
        background-position-x: -200%;
    }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
    width: 100%;
}

.skeleton-text-short {
    width: 60%;
}

.skeleton-title {
    height: 2rem;
    width: 50%;
    margin-bottom: 1rem;
}

.skeleton-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    height: 120px;
    width: 100%;
    border-radius: var(--border-radius-lg);
}

/* Progressive Load Fades */
.fade-up-ready, .card, .settings-card, .activity-card, .stat-card, .account-card, .attendance-card, .event-card, .login-card, .register-card, .summary-card {
    opacity: 1; /* Graceful degradation: fully visible by default */
    transform: translateY(0);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

body.js-enabled .fade-up-ready,
body.js-enabled .card,
body.js-enabled .settings-card,
body.js-enabled .activity-card,
body.js-enabled .stat-card,
body.js-enabled .account-card,
body.js-enabled .attendance-card,
body.js-enabled .event-card,
body.js-enabled .login-card,
body.js-enabled .register-card,
body.js-enabled .summary-card {
    opacity: 0;
    transform: translateY(10px);
}

body.js-enabled .fade-up-ready.fade-up-active,
body.js-enabled .card.fade-up-active,
body.js-enabled .settings-card.fade-up-active,
body.js-enabled .activity-card.fade-up-active,
body.js-enabled .stat-card.fade-up-active,
body.js-enabled .account-card.fade-up-active,
body.js-enabled .attendance-card.fade-up-active,
body.js-enabled .event-card.fade-up-active,
body.js-enabled .login-card.fade-up-active,
body.js-enabled .register-card.fade-up-active,
body.js-enabled .summary-card.fade-up-active {
    opacity: 1;
}

/* ============================================
   LMS Error Banner (Floating Toast)
   ============================================ */

.lms-error-banner {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: auto;
    max-width: 380px;
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 9999;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    animation: slideInToast 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInToast {
    0% { transform: translateY(120%); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@media (max-width: 768px) {
    .lms-error-banner {
        bottom: 16px;
        right: 16px;
        left: 16px;
        max-width: none;
    }
}
    


/* Spin animation for refresh buttons */
.btn.spinning i {
    animation: btn-spin 0.8s linear infinite;
}
@keyframes btn-spin {
    to { transform: rotate(360deg); }
}

/* Typography Utilities */
.text-center { text-align: center !important; }
.text-start { text-align: left !important; }
.text-end { text-align: right !important; }


/* Pro-Max Footer Badge */
.author-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: none;
    transition: var(--smooth-hover);
    box-shadow: 0 2px 10px var(--shadow-color);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.author-badge:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .author-badge:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.author-badge .badge-text {
    color: var(--text-secondary);
}

.author-badge strong,
.author-badge .badge-author {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.03em;
    transition: color 0.3s ease;
}

.author-badge:hover strong,
.author-badge:hover .badge-author {
    color: var(--primary-color);
}

.btn:active {
    transform: scale(0.95);
    transition: transform 100ms cubic-bezier(0.23, 1, 0.32, 1);
}