:root {
    --primary: #4a6cf7;
    --primary-dark: #3a56d4;
    --primary-light: #eef1ff;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    --dark: #1f2937;
    --gray: #6b7280;
    --gray-light: #9ca3af;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: #f8fafc;
    color: var(--dark);
    min-height: 100vh;
    overflow-x: hidden;
}

.dashboard-wrapper {
    display: flex;
    min-height: 100vh;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-text h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin: 0;
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--gray);
    margin: 0;
}

.menu-toggle {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
    margin: 0 auto;
}

.sidebar {
    width: 280px;
    background: var(--white);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    z-index: 900;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
}

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

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-logo-text h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin: 0;
}

.sidebar-logo-text p {
    font-size: 0.8rem;
    color: var(--gray);
    margin: 0;
}

.close-menu {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.close-menu:hover {
    background: var(--border-light);
}

.user-profile-mini {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar-mini {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 1.1rem;
}

.user-info-mini {
    flex: 1;
}

.user-name-mini {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.user-email-mini {
    font-size: 0.85rem;
    color: var(--gray);
}

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

.nav-list {
    list-style: none;
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.5rem;
    color: var(--gray);
    text-decoration: none;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--border-light);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-link span {
    font-size: 0.95rem;
    font-weight: 500;
}

.logout-item {
    margin-top: auto;
    border-top: 1px solid var(--border);
    padding-top: 0.5rem;
}

.logout-item .nav-link {
    color: var(--danger);
}

.logout-item .nav-link:hover {
    background: #fee;
    color: var(--danger);
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 0;
    min-height: 100vh;
    background: #f8fafc;
    transition: var(--transition);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

.loading-overlay p {
    color: var(--gray);
    font-size: 0.95rem;
}

.dashboard-section {
    display: none;
    padding: 2rem;
    animation: fadeIn 0.3s ease;
}

.dashboard-section.active {
    display: block;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.section-header h1 {
    font-size: 1.75rem;
    color: var(--dark);
    font-weight: 700;
}

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

.btn-notification {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-notification:hover {
    background: var(--border-light);
    color: var(--dark);
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: var(--white);
    font-size: 0.7rem;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.btn-refresh {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--gray);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-refresh:hover {
    background: var(--border-light);
    color: var(--dark);
}

.btn-refresh i {
    transition: transform 0.3s ease;
}

.btn-refresh:hover i {
    transform: rotate(180deg);
}

.btn-primary {
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-outline {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--border-light);
    color: var(--dark);
    border-color: var(--gray-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

.card-header h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.quick-action-btn {
    padding: 1.5rem 1rem;
    background: var(--border-light);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray);
}

.quick-action-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}

.quick-action-btn i {
    font-size: 1.5rem;
}

.quick-action-btn span {
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    background: var(--border-light);
    transition: var(--transition);
}

.activity-item:hover {
    background: var(--border);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.activity-time {
    font-size: 0.85rem;
    color: var(--gray);
}

.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.lesson-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: slideUp 0.5s ease;
}

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

.lesson-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.lesson-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #e0e7ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 3rem;
    position: relative;
}

.lesson-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lesson-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--secondary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.lesson-content {
    padding: 1.5rem;
}

.lesson-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.lesson-description {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 1rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.price-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.lesson-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-access {
    flex: 1;
    padding: 0.75rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-access.locked {
    background: var(--gray-light);
    cursor: not-allowed;
}

.btn-access.locked:hover {
    background: var(--gray-light);
}

.loading-shimmer {
    background: linear-gradient(90deg, var(--border) 25%, var(--border-light) 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.enrolled-lessons {
    display: grid;
    gap: 1.5rem;
}

.enrolled-lesson-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.enrolled-lesson-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-lg);
}

.lesson-progress {
    flex: 1;
}

.lesson-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 4px;
    transition: width 0.6s ease;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--gray);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray);
}

.empty-state i {
    font-size: 4rem;
    color: var(--border);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.empty-state p {
    margin-bottom: 1.5rem;
}

.progress-container {
    display: grid;
    gap: 2rem;
}

.progress-overview {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 3rem;
    box-shadow: var(--shadow);
}

.progress-circle {
    position: relative;
}

.progress-percent {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-percent span {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    display: block;
}

.progress-percent small {
    font-size: 0.85rem;
    color: var(--gray);
}

.progress-stats {
    display: flex;
    gap: 2rem;
}

.progress-stat {
    text-align: center;
}

.progress-stat h4 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.progress-stat p {
    font-size: 0.9rem;
    color: var(--gray);
}

.progress-list {
    display: grid;
    gap: 1rem;
}

.certificate-container {
    background: var(--white);
    border-radius: var(--radius);
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.certificate-placeholder {
    max-width: 400px;
    margin: 0 auto;
}

.certificate-progress {
    margin-top: 2rem;
}

.certificate-progress .progress-bar {
    height: 12px;
    margin-bottom: 1rem;
}

.profile-container {
    display: grid;
    gap: 2rem;
}

.profile-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.profile-avatar {
    position: relative;
}

.avatar-placeholder {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 700;
}

.avatar-upload {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.avatar-upload:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.profile-info h2 {
    font-size: 1.75rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.profile-info p {
    color: var(--gray);
    margin-bottom: 0.25rem;
}

.profile-role {
    color: var(--primary) !important;
    font-weight: 600;
}

.profile-details {
    display: grid;
    gap: 1rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--gray);
    font-weight: 500;
}

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

.profile-settings {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.settings-list {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.setting-item:hover {
    border-color: var(--primary);
}

.setting-info h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.setting-info p {
    font-size: 0.85rem;
    color: var(--gray);
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border);
    transition: var(--transition);
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition);
    border-radius: 50%;
}

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

input:checked + .slider:before {
    transform: translateX(30px);
}

.payment-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius);
    max-width: 500px;
    margin: 2rem auto;
    animation: modalSlide 0.3s ease;
}

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

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

.modal-header h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 1.25rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--border-light);
    color: var(--dark);
}

.modal-body {
    padding: 2rem;
}

.payment-info {
    text-align: center;
}

.payment-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1.5rem;
}

.payment-info h4 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.payment-description {
    color: var(--gray);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.payment-amount {
    background: var(--border-light);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.payment-amount span {
    display: block;
    color: var(--gray);
    margin-bottom: 0.5rem;
}

.payment-amount h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin: 0;
}

.payment-note {
    color: var(--gray);
    font-size: 0.9rem;
    font-style: italic;
}

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

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: toastSlide 0.3s ease;
    min-width: 300px;
}

@keyframes toastSlide {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.success {
    border-left: 4px solid var(--secondary);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.info {
    border-left: 4px solid var(--primary);
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.toast.success .toast-icon {
    background: var(--secondary);
    color: white;
}

.toast.error .toast-icon {
    background: var(--danger);
    color: white;
}

.toast.info .toast-icon {
    background: var(--primary);
    color: white;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--gray);
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-nav {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .close-menu {
        display: flex;
    }
    
    .main-content {
        margin-left: 0;
        padding-top: 70px;
    }
    
    .dashboard-section {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .progress-overview {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .progress-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .lessons-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 1rem;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer button {
        width: 100%;
    }
}