/* 
 * Modern Minimalistic CSS
 * Online Video Courses Platform
 */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap');


:root {
    --primary-color: #102F8E;
    --primary-hover: #0D256E;
    --secondary-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --text-primary: #666;
    --text-secondary: #45587b;
    --text-accent: #da4269;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --border-color: #E5E7EB;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --theme-alt-accent: #113274;
    
    /* Blue colors (used in chat.css and other files) */
    --blue-primary: #007bff;
    --blue-primary-hover: #0056b3;
    --blue-light: #e3f2fd;
    
    /* Gradient colors (used in analytics.css) */
    --gradient-purple-start: #667eea;
    --gradient-purple-end: #764ba2;
    --gradient-blue-start: #3b82f6;
    --gradient-blue-end: #2563eb;
    --gradient-violet-start: #8b5cf6;
    --gradient-violet-end: #7c3aed;
    
    /* Success variants */
    --success-dark: #059669;
    --success-light: #d1fae5;
    
    /* Warning variants */
    --warning-dark: #d97706;
    --warning-light: #fef3c7;
    
    /* Danger variants */
    --danger-dark: #dc2626;
    --danger-light: #fee2e2;
    
    /* Info colors */
    --info-color: #2563eb;
    --info-light: #dbeafe;
    
    /* Additional background colors */
    --bg-tertiary: #f8f9fa;
    --bg-hover: #f0f0f0;
    
    /* Modal overlay */
    --overlay-color: rgba(0, 0, 0, 0.5);
    --overlay-color-dark: rgba(0, 0, 0, 0.7);
    
    /* Badge overlay for light backgrounds */
    --badge-overlay-light: rgba(255, 255, 255, 0.2);
    
    /* Text variants */
    --text-muted: #999;
    --text-light: #fff;
    
    /* Gray colors for scrollbar etc. */
    --gray-100: #f1f1f1;
    --gray-400: #888;
    --gray-600: #555;
    
    /* Blue shadow for focus states */
    --shadow-blue-focus: 0 0 0 3px rgba(59, 130, 246, 0.1);
    --shadow-blue-card: 0 5px 15px rgba(59, 130, 246, 0.2);
}

/* Dark mode variables */
[data-theme="dark"] {
    --bg-primary: #18192F;
    --bg-secondary: #232449;
    --text-primary: #e2e5ef;
    --text-secondary: #b6bdd8;
    --theme-alt-accent: #e2e5ef;
    --border-color: #374151;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --warning-color: var(--bg-secondary);
    
    /* Blue colors - adjusted for dark mode */
    --blue-primary: #3b82f6;
    --blue-primary-hover: #2563eb;
    --blue-light: #1e3a5f;
    
    /* Gradient colors remain similar in dark mode */
    --gradient-purple-start: #667eea;
    --gradient-purple-end: #764ba2;
    --gradient-blue-start: #3b82f6;
    --gradient-blue-end: #2563eb;
    --gradient-violet-start: #8b5cf6;
    --gradient-violet-end: #7c3aed;
    
    /* Success variants */
    --success-dark: #10b981;
    --success-light: #064e3b;
    
    /* Warning variants */
    --warning-dark: #f59e0b;
    --warning-light: #78350f;
    
    /* Danger variants */
    --danger-dark: #ef4444;
    --danger-light: #7f1d1d;
    
    /* Info colors */
    --info-color: #3b82f6;
    --info-light: #1e3a8a;
    
    /* Additional background colors */
    --bg-tertiary: #1f2937;
    --bg-hover: #374151;
    
    /* Modal overlay - darker in dark mode */
    --overlay-color: rgba(0, 0, 0, 0.75);
    --overlay-color-dark: rgba(0, 0, 0, 0.85);
    
    /* Badge overlay for light backgrounds */
    --badge-overlay-light: rgba(255, 255, 255, 0.15);
    
    /* Text variants */
    --text-muted: #9ca3af;
    --text-light: #fff;
    
    /* Gray colors for scrollbar etc. */
    --gray-100: #374151;
    --gray-400: #6b7280;
    --gray-600: #9ca3af;
    
    /* Blue shadow for focus states */
    --shadow-blue-focus: 0 0 0 3px rgba(59, 130, 246, 0.2);
    --shadow-blue-card: 0 5px 15px rgba(59, 130, 246, 0.3);
}

/* Smooth transitions for theme switching */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Container Wide - for Analytics/Dashboard */
.container-wide {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* Responsive Typography */
h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h2 {
    font-size: clamp(1.25rem, 3.5vw, 2rem);
}

h3 {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
}

h1, h2, h3 {
    font-family: "Comfortaa";
    font-weight: 400;
    color: var(--theme-alt-accent);
}

/* Header */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    padding: 4px; /* Większe pole do kliknięcia na mobile */
    text-decoration: none;
}

.logo-img {
  display: block;
  height: auto;
  max-height: 40px;
  width: auto;
}

.logo-img-login-page {
  height: auto;
  max-height: 120px;
  width: auto;
  margin-bottom: 1rem;
}

.user-info {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info-link {
    display: inline-block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
    text-decoration: none;
}

.user-name {
    font-weight: 500;
    color: var(--text-primary);
}

.user-role {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    text-transform: capitalize;
}

.user-role.administrator {
    background-color: var(--danger-color);
}

.user-role.teacher {
    background-color: var(--warning-color);
}

.user-role.manager {
    background-color: var(--primary-hover);
}

.user-role.user {
    background-color: var(--primary-color);
}

/* Główne style - Wymuszanie koła */
.nav > a, 
.help-icon-link,
.user-avatar-circle {
    /* Wymuszamy kwadrat 1:1 */
    width: 32px !important;
    height: 32px !important;
    aspect-ratio: 1 / 1 !important;
    
    /* Kształt i obramowanie */
    border-radius: 50% !important;
    border: 2px solid var(--border-color) !important;
    box-sizing: border-box !important;

    /* Centrowanie za pomocą Grid (najbezpieczniejsze dla ikon) */
    display: grid !important;
    place-items: center !important;
    
    /* Reset stylów domyślnych */
    background: transparent;
    padding: 0 !important;
    margin: 0;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    overflow: hidden;
    flex-shrink: 0;
}

/* Specyficzny styl dla awatara (inicjały KS) */
.user-avatar-circle.manager {
    background-color: var(--primary-hover) !important;
    border-color: var(--accent-color) !important;
    color: white !important;
    font-size: 0.875rem !important;
    font-weight: 600;
}

/* Ikony Font Awesome */
.nav a i, 
.help-icon-link i {
    font-size: 1rem !important;
    line-height: 1 !important;
    display: block !important;
    margin: 0 !important;
}

/* Hover - przywrócenie koloru ikony i obramowania */
.nav a:hover, 
.help-icon-link:hover {
    border-color: var(--accent-color) !important;
    color: var(--accent-color) !important;
    background-color: var(--hover-bg);
}

/* Poprawka dla badge (powiadomienie na czacie) */
.nav a {
    position: relative;
    overflow: visible;
}

/* Specyficzny styl dla awatara managera (jeśli ma być wypełniony kolorem) */
.user-avatar-circle.manager {
    background-color: var(--primary-hover);
    border-color: var(--accent-color);
    color: white;
}

.user-avatar-circle.administrator {
    background-color: var(--danger-color);
}

.user-avatar-circle.teacher {
    background-color: var(--warning-color);
}

.user-avatar-circle.manager {
    background-color: var(--primary-hover);
}

.user-avatar-circle.user {
    background-color: var(--primary-color);
    color: var(--text-light);
}

/* .user-avatar-circle:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
} */

/* User Dropdown Menu */
.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    border-radius: 0.5rem;
    min-width: 220px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease-in-out;
    border: 1px solid var(--border-color);
}

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

.user-dropdown-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-size: 0.875rem;
}

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

.user-dropdown-item:last-child {
    border-radius: 0 0 0.5rem 0.5rem;
}

/* Theme Toggle Container */
.theme-toggle-container {
    border-bottom: 1px solid var(--border-color);
}

.theme-toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    cursor: pointer;
}

.theme-toggle-checkbox {
    display: none;
}

.theme-toggle-switch, .switch {
    position: relative;
    width: 40px;
    height: 20px;
    background-color: var(--border-color);
    border-radius: 10px;
    transition: background-color 0.3s;
}

.theme-toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background-color: var(--bg-primary);
    border-radius: 50%;
    transition: transform 0.3s;
}

.theme-toggle-checkbox:checked + .theme-toggle-switch {
    background-color: var(--primary-color);
}

.theme-toggle-checkbox:checked + .theme-toggle-switch::after {
    transform: translateX(20px);
}

/* Logout Button in Dropdown */
.logout-button-dropdown {
    gap: 0.5rem;
}

/* Logout icon reduced by 25% (20px -> 15px) for dropdown */
.logout-icon-small {
    position: relative;
    width: 15px;
    height: 15px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    border-top-color: transparent;
    display: inline-block;
    transition: transform 0.2s ease-in-out, border-color 0.2s;
}

.logout-icon-small::before {
    content: "";
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 7px;
    border-radius: 2px;
    background-color: var(--primary-color);
}

.logout-button-dropdown:hover .logout-icon-small {
    border-color: var(--primary-hover);
}

.logout-button-dropdown:hover .logout-icon-small::before {
    background-color: var(--primary-hover);
}

.user-icon {
    display: inline-block;
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

.logout-icon {
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 6px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  border-top-color: transparent; 
  display: inline-block;
  transition: transform 0.2s ease-in-out, border-color 0.2s;
  cursor: pointer;
}

.logout-icon::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 9px;
  border-radius: 2px;
  background-color: var(--primary-color);
}

.logout-icon:hover {
    transform: scale(1.1);
    border-color: var(--primary-hover);
}

.unread-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 12px;
    height: 12px;
    background-color: var(--danger-color);
    border-radius: 50%;
    border: 1px solid var(--bg-primary);
    text-indent: -9999px;
    overflow: hidden;
    display: block;
}

/* Navigation */
.nav {
    display: flex;
    gap: 1rem;
}

.nav #userDropdown a {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.5rem 0rem;
    border-radius: 0.375rem;
    transition: all 0.2s;
    display: flex;
}

.nav #userDropdown i {
    padding: 0.2rem 0.5rem;
}

.nav a:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}


.main-nav a:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.main-nav {
    display: flex;
    gap: 1rem;
}

.main-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.main-nav a.btn-primary {
    color: var(--text-light);
}

/* Main Content */
.main-content {
    padding: 2rem 0;
}

/* Login Page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.login-card {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-header p,
.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.footer a {
    font-size: 0.875rem;
    text-decoration: none;
    color: var(--primary-color);
}

.footer .company-info p {
    /* margin-top: 0.5rem; */
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Auth Links */
.auth-links {
    margin-top: 1.5rem;
    text-align: center;
}

.auth-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.auth-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.form-help {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: all 0.2s;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input::placeholder {
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.5;
}

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

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

.btn-secondary {
    background-color: var(--text-secondary);
    color: var(--text-light);
}

.btn-secondary:hover {
    background-color: var(--text-primary);
}

.btn-success {
    background-color: var(--secondary-color);
    color: var(--text-light);
}

.btn-success:hover {
    opacity: 0.9;
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--text-light);
}

.btn-danger:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

.alert-success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #6EE7B7;
}

.alert-info {
    background-color: #DBEAFE;
    color: #1E40AF;
    border: 1px solid #93C5FD;
}

/* Cards */
.card {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

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

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Table */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    background-color: var(--bg-secondary);
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    border-bottom: 2px solid var(--border-color);
}

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

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

.table-actions {
    display: flex;
    gap: 0.5rem;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-primary {
    background-color: #DBEAFE;
    color: #1E40AF;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-secondary {
    background-color: #F3F4F6;
    color: #4B5563;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

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

.modal-footer {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

/* Responsive */
/* Desktop - iPad Pro landscape */
@media (min-width: 1024px) and (orientation: landscape) {
    .container-wide {
        max-width: 1600px;
        padding: 0 2.5rem;
    }
}

/* Tablet and below - adjust header spacing */
@media (max-width: 768px) {
    .logo {
        font-size: 1.25rem;
    }
    
    .user-info {
        gap: 0.5rem;
    }
}

@media (max-width: 640px) {
    .logo {
        font-size: 1.1rem;
        display: none;
    }
    
    .user-info {
        gap: 0.4rem;
    }
    
    .user-avatar-circle {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }

    .table-container-card {
        display: none;
    }
}

@media (max-width: 1024px) {
    .header-content {
        flex-direction: row;
    }
    
    .user-name {
        display: none;
    }
    
    .user-dropdown-menu {
        right: 0;
        min-width: 200px;
    }
    
    .user-dropdown-menu.active {
        max-width: calc(100vw - 2rem);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        border-radius: 0.5rem;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Hidden */
.hidden {
    display: none;
}

/* Chat Unread Badge in Navigation */
/* .unread-badge {
    background-color: #e74c3c;
    color: white;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 11px;
    font-weight: bold;
    margin-left: 5px;
    display: inline-block;
    min-width: 18px;
    text-align: center;
    line-height: 1.2;
} */

/* Course-specific Styles */

/* Course Thumbnail */
.course-thumbnail {
    width: 80px;
    height: 45px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.course-thumbnail-placeholder {
    width: 80px;
    height: 45px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.625rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Video Player Container - Responsive 16:9 */
.video-player-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    background-color: #000;
}

.video-player-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Lesson Cards */
.lesson-card {
    transition: transform 0.2s, box-shadow 0.2s;
}

.lesson-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Badge Variants */
.badge-warning {
    background-color: var(--warning-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-block;
}

/* Video Container - Responsive 16:9 aspect ratio */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    background-color: #000;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Account Management Styles */
.account-page {
    max-width: 1000px;
    margin: 0 auto;
}

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

.page-header h1 {
    margin-bottom: 0.5rem;
}

.managing-user-badge {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin-top: 0.5rem;
}

.account-tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-button {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}

.tab-button:hover {
    color: var(--primary-color);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 500;
}

.tab-contents {
    margin-bottom: 2rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.read-only-field {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-administrator {
    background-color: #dc2626;
    color: white;
}

.badge-manager {
    background-color: #7c3aed;
    color: white;
}

.badge-teacher {
    background-color: #2563eb;
    color: white;
}

.badge-user {
    background-color: #6b7280;
    color: white;
}

.badge-success {
    background-color: #10b981;
    color: white;
}

.badge-warning {
    background-color: #f59e0b;
    color: white;
}

.badge-danger {
    background-color: #ef4444;
    color: white;
}

.badge-secondary {
    background-color: #6b7280;
    color: white;
}

.badge-info {
    background-color: #3b82f6;
    color: white;
}

.badge-pending {
    background-color: #f59e0b;
    color: white;
}

.badge-completed {
    background-color: #10b981;
    color: white;
}

.badge-failed {
    background-color: #ef4444;
    color: white;
}

.badge-refunded {
    background-color: #6b7280;
    color: white;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-body {
    padding: 1.5rem;
}

.form-hint {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table thead th {
    background-color: var(--bg-secondary);
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

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

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

.td-group-separator {
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    padding: 0.5rem;
    text-transform: uppercase;
}

/* Account link styling */
.account-link {
    font-weight: 500;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .course-thumbnail {
        width: 60px;
        height: 34px;
    }
    
    .course-thumbnail-placeholder {
        width: 60px;
        height: 34px;
        font-size: 0.5rem;
    }
    
    /* Stack course view grid on mobile */
    div[style*="grid-template-columns: 1fr 380px"] {
        grid-template-columns: 1fr !important;
    }
    
    .account-tabs {
        overflow-x: auto;
    }
    
    .tab-button {
        white-space: nowrap;
        padding: 0.75rem 1rem;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: 0.5rem;
    }
    
    /* Sidebar navigation on mobile */
    .dashboard-sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .dashboard-sidebar.active {
        transform: translateX(0);
    }
    
    .hamburger-menu {
        display: block !important;
    }
    
    .dashboard-layout {
        grid-template-columns: 1fr !important;
    }
    
    .dashboard-main {
        grid-column: 1 / -1;
        width: 100%;
        margin-left: 0 !important;
    }
    
    /* Account page full width on mobile */
    .account-page {
        max-width: 100%;
        padding: 1rem;
    }
}

/* Dashboard Sidebar Navigation */
.dashboard-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 120px);
    gap: 0;
}

/* Full width layout for pages without sidebar */
.dashboard-layout:has(.dashboard-main:only-child) {
    display: flex;
}

.dashboard-sidebar {
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 76px; /* Below header */
    left: 0;
    height: calc(100vh - 76px);
    width: 280px;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 100;
}

.dashboard-main {
    max-width: 1660px;
    width: 100%;
    box-sizing: border-box;
    padding: 2rem;
    margin: 0 auto;
}

/* When sidebar exists, dashboard-main should start after it */
/* .dashboard-sidebar + .dashboard-main {
    margin-left: 280px;
} */

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

.sidebar-nav-item {
    display: block;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 14px;
}

.sidebar-nav-item:hover {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
}

.sidebar-nav-item.active {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.sidebar-nav-icon {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
}

.sidebar-nav-text {
    flex: 1;
}

.sidebar-nav-lesson-meta {
    font-size: 12px;
    color: var(--text-accent);
    display: block;
    font-weight: 400;
    margin-top: 4px;
}

/* Hamburger Menu for Mobile */
.hamburger-menu {
    display: none;
    position: static;
    top: 1rem;
    left: 1rem;
    margin-right: 1rem;
    z-index: 200;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.hamburger-menu:hover {
    background-color: var(--primary-hover);
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.hamburger-icon span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: white;
    transition: all 0.3s;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

/* Account Page - Max width and centered */
.account-page {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

/* Hide hamburger menu on pages without sidebar */
body:has(.dashboard-layout .dashboard-main:only-child) .hamburger-menu {
    display: none !important;
}

/* Form Styling Improvements */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.read-only-field {
    padding: 0.75rem 0;
    color: var(--text-primary);
}

.alert-warning {
    background-color: #FEF3C7;
    color: #92400E;
    border: 1px solid #FCD34D;
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

/* Autoplay Countdown Overlay */
.autoplay-countdown {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    z-index: 20;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.countdown-content {
    text-align: center;
    padding: 2rem;
}

.countdown-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.countdown-timer {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.countdown-next-lesson {
    font-size: 1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.countdown-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.countdown-cancel-btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 0.375rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.countdown-cancel-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.countdown-next-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.375rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.countdown-next-btn:hover {
    background-color: var(--primary-hover);
}

/* Autoplay Toggle */
.autoplay-toggle-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.autoplay-toggle-container label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-primary);
    user-select: none;
}

.autoplay-toggle-container input[type="checkbox"] {
    width: 40px;
    height: 20px;
    cursor: pointer;
}

.autoplay-toggle-label {
    min-width: 30px;
}

/* Improved Duration Display */
div .lesson-duration {
    color: var(--text-accent);
    font-weight: 500;
}

/* About This Lesson Section */
.lesson-description-text {
    max-width: 800px;
    margin-left: 0;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* Mobile responsiveness for autoplay countdown */
@media (max-width: 768px) {
    .countdown-timer {
        font-size: 3rem;
    }
    
    .countdown-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .countdown-cancel-btn,
    .countdown-next-btn {
        width: 100%;
    }
}

/* ========================================
   Course View UX Improvements
   ======================================== */

/* Main wrapper - centered content on large screens */
.main-wrapper {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0;
}

/* Video Navigation Overlay */
.video-nav-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    pointer-events: none;
    padding: 0 1rem;
    z-index: 10;
}

.video-nav-btn {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.4;
    text-decoration: none;
}

.video-nav-btn:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.video-player-container:hover .video-nav-btn {
    opacity: 0.7;
}

.video-nav-btn svg {
    width: 24px;
    height: 24px;
}

/* Navigation Buttons */
.lesson-navigation-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.lesson-navigation-buttons .btn {
    padding: 0.6rem 1.2rem;
}

/* .switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
} */

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--bg-primary);
  transition: .3s;
  border-radius: 34px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
}

.slider::before {
  position: absolute;
  content: "";
  height: 17px;
  width: 17px;
  left: 1px;
  bottom: 1px;
  background-color: var(--primary-color);
  transition: .3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:checked + .slider::before {
  transform: translateX(20px);
  background-color: var(--bg-primary);
}

/* Sticky Sidebar */
.course-sidebar {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}

/* Tablet - Remove excessive margins */
@media (max-width: 1024px) {
    .main-wrapper {
        max-width: 100%;
        padding: 0 1rem;
    }
    
    .dashboard-main {
        padding: 1.5rem 1rem;
    }

    .dashboard-layout {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 1024px) {
    .dashboard-main {
        grid-column: 2 / 3;
    }
}

/* Mobile Optimizations */
@media (max-width: 1024px) {
    /* Floating Navigation */
    .lesson-navigation-buttons {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        backdrop-filter: blur(10px);
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
        padding: 1rem;
        margin: 0;
        border-top: 1px solid var(--border-color);
        z-index: 100;
        flex-direction: row;
        gap: 0.75rem;
    }
    
    .lesson-navigation-buttons .btn {
        flex: 1;
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    /* Add padding to content to prevent overlap with floating navigation */
    .lesson-content-wrapper {
        padding-bottom: 80px;
    }
    
    /* Hide video overlay buttons on very small screens */
    .video-nav-btn {
        width: 40px;
        height: 40px;
    }
    
    .video-nav-overlay {
        padding: 0 0.5rem;
    }

    .stats-icon-link {
        display: none;
    }
}

/* Help/Support Icon */
.help-icon-link {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.help-icon-link:hover {
    color: var(--primary-color);
}

.help-icon-link svg {
    width: 24px;
    height: 24px;
}

/* Issue Report Modal Specific Styles */
.modal-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

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

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

.required {
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-control[type="file"] {
    padding: 0.5rem;
}

.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

.alert-success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #6EE7B7;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

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

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

.btn-spinner {
    display: inline-block;
}

/* Dashboard Quick Actions */
.dashboard-quick-actions {
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Dashboard Welcome Section */
.dashboard-welcome-section {
    padding: 1rem 0;
}

.dashboard-welcome-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Dashboard Empty State */
.dashboard-empty-state {
    text-align: center;
    padding: 3rem 0;
    color: var(--text-secondary);
}

.dashboard-empty-state svg {
    margin: 0 auto 1rem;
}

.dashboard-empty-state h3 {
    margin-bottom: 0.5rem;
}

.dashboard-empty-state .btn {
    margin-top: 1rem;
}

/* Dashboard Loading State */
.dashboard-loading-state {
    text-align: center;
    padding: 1rem;
}

/* Dashboard Table Labels */
.dashboard-table-label {
    font-weight: 600;
    width: 200px;
}

/* Stat Card Descriptions */
.stat-card-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Manager Invitation Link Section */
.manager-invitation-container {
    background-color: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.manager-invitation-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.manager-invitation-input-wrapper {
    flex: 1;
    overflow: hidden;
}

.manager-invitation-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.manager-invitation-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.manager-invitation-message {
    margin-top: 1rem;
}

.manager-invitation-warning {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--warning-color);
    border: 1px solid var(--danger-color);
    border-radius: 4px;
}

.manager-invitation-warning p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.register-invite-container {
    max-width: 500px !important;
}

.table a.lesson-name {
    text-decoration: none;
    transition: background-color 0.2s;
    color: var(--text-primary);
}

p.plan-description-header {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

p.plan-description-key-benefit {
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: 600;
}