/* Дополнительные стили для админ-панели */
.admin-panel {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    min-height: 600px;
    margin-top: 40px;
}

.admin-sidebar {
    background: var(--white);
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    height: fit-content;
    position: sticky;
    top: 20px;
    border: 1px solid var(--gray-100);
}

.admin-profile {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--gray-100);
    margin-bottom: 20px;
}

.admin-profile__avatar {
    font-size: 64px;
    margin-bottom: 10px;
}

.admin-profile h3 {
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.admin-nav__item {
    background: none;
    border: none;
    padding: 15px;
    text-align: left;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s;
    font-size: 15px;
    color: var(--gray-600);
    font-weight: 500;
}

.admin-nav__item:hover {
    background: var(--gray-50);
}

.admin-nav__item.active {
    background: var(--primary-blue);
    color: var(--white);
}

.admin-content {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid var(--gray-100);
}

.admin-section {
    display: none;
}

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

.admin-section h2 {
    color: var(--gray-900);
    margin-bottom: 30px;
    font-size: 32px;
    font-weight: 800;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.dashboard-card {
    background: var(--gray-50);
    padding: 25px;
    border-radius: 16px;
    display: flex;
    gap: 20px;
    align-items: center;
    transition: all 0.3s;
    border: 1px solid var(--gray-100);
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.dashboard-card__icon {
    font-size: 48px;
}

.dashboard-card__value {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.dashboard-card__label {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 5px;
}

.dashboard-card__change {
    font-size: 12px;
}

.dashboard-card__change.positive {
    color: #28a745;
}

.dashboard-charts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.chart-box {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--gray-100);
}

.chart-box h3 {
    margin: 0 0 15px;
    font-size: 18px;
    color: var(--gray-900);
}

.dashboard-activity {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--gray-100);
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.activity-item {
    display: flex;
    gap: 15px;
    padding: 10px;
    background: var(--white);
    border-radius: 8px;
}

.activity-time {
    color: var(--gray-600);
    font-size: 14px;
    min-width: 50px;
}

.admin-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--gray-100);
    border-radius: 12px;
    font-size: 15px;
}

.filter-select {
    padding: 12px 16px;
    border: 2px solid var(--gray-100);
    border-radius: 12px;
    font-size: 15px;
    background: var(--white);
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.data-table th,
.data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

.data-table th {
    background: var(--gray-50);
    color: var(--gray-900);
    font-weight: 600;
}

.data-table tr:hover {
    background: var(--gray-50);
}

.role-badge {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.role-badge.student {
    background: #d1ecf1;
    color: #0c5460;
}

.role-badge.teacher {
    background: #d4edda;
    color: #155724;
}

.role-badge.admin {
    background: #f8d7da;
    color: #721c24;
}

.status-badge {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.active {
    background: #d4edda;
    color: #155724;
}

.status-badge.blocked {
    background: #f8d7da;
    color: #721c24;
}

.btn--warning {
    background: #ffc107;
    color: #212529;
}

.btn--warning:hover {
    background: #e0a800;
}

.btn--small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn--danger {
    background: #dc3545;
    color: var(--white);
}

.btn--danger:hover {
    background: #c82333;
}

.courses-admin-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.course-admin-card {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--gray-100);
}

.course-admin-card h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.course-admin-card__actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.finance-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.finance-card {
    background: var(--gray-50);
    padding: 25px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--gray-100);
}

.finance-card h3 {
    margin: 0 0 15px;
    font-size: 18px;
    color: var(--gray-900);
}

.finance-card__amount {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-mint);
    margin-bottom: 10px;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.analytics-card {
    background: var(--gray-50);
    padding: 25px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--gray-100);
}

.analytics-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-blue);
    margin: 15px 0;
}

.notifications-list,
.mailing-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.notification-card,
.mailing-card {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--gray-100);
}

.notification-status {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.notification-status.sent {
    background: #d4edda;
    color: #155724;
}

.notification-status.scheduled {
    background: #fff3cd;
    color: #856404;
}

.mailing-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 25px 0;
}

.stat-box {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--gray-100);
}

.stat-box__value {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.backup-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.backup-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.backup-item {
    background: var(--gray-50);
    padding: 20px;
    border-radius: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--gray-100);
}

.backup-item__actions {
    display: flex;
    gap: 10px;
}

@media (max-width: 992px) {
    .admin-panel {
        grid-template-columns: 1fr;
    }
    
    .dashboard-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .dashboard-stats,
    .finance-summary,
    .analytics-grid {
        grid-template-columns: 1fr;
    }
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    align-items: center;
    justify-content: center;
}

.modal__content {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal__content--large {
    max-width: 800px;
}

.modal__close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 30px;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--gray-600);
}

.modal__close:hover {
    color: var(--gray-900);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-900);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-100);
    border-radius: 12px;
    font-size: 15px;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.lesson-item {
    background: var(--white);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--gray-100);
    margin-bottom: 10px;
}

.lesson-item h4 {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.lesson-item p {
    margin: 5px 0;
    color: var(--gray-600);
    font-size: 14px;
}