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

:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --bg-dark: #1a1a1a;
    --bg-light: #f5f5f5;
    --sidebar-bg: #2c3e50;
    --text-dark: #333;
    --text-light: #fff;
    --border-color: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Навигация админки */
.admin-nav {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #34495e 100%);
    color: var(--text-light);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.admin-nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

/* Контейнер админки */
.admin-container {
    display: flex;
    min-height: calc(100vh - 60px);
}

/* Боковое меню */
.admin-sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--text-light);
    padding: 2rem 0;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    padding: 1rem 2rem;
    color: var(--text-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255,255,255,0.1);
}

.nav-item.active {
    background-color: rgba(255,255,255,0.15);
    border-left-color: var(--primary-color);
}

.nav-item span {
    font-size: 1.2rem;
}

/* Основной контент */
.admin-main {
    flex: 1;
    padding: 2rem;
}

.admin-section {
    display: none;
}

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

.admin-section h2 {
    margin-bottom: 2rem;
    color: var(--secondary-color);
    font-size: 2rem;
}

/* Статистические карточки */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--text-light);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    font-size: 3rem;
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-info p {
    color: #666;
    font-size: 0.9rem;
}

/* Таблицы */
.section-content {
    background: var(--text-light);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.table-container {
    overflow-x: auto;
    margin-top: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th {
    background-color: var(--secondary-color);
    color: var(--text-light);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table tr:hover {
    background-color: var(--bg-light);
}

.data-table .loading {
    text-align: center;
    padding: 2rem;
    color: #999;
}

/* Кнопки */
.btn {
    padding: 0.6rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #357abd;
}

.btn-secondary {
    background-color: #95a5a6;
    color: var(--text-light);
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

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

.btn-danger:hover {
    background-color: #c0392b;
}

/* Панель действий */
.actions-bar {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.filters select {
    padding: 0.6rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}

/* Пагинация */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Модальные окна */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--text-light);
    margin: 10% auto;
    padding: 2rem;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-dark);
}

.close:hover {
    color: var(--accent-color);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.modal-content input,
.modal-content textarea {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.modal-content input:focus,
.modal-content textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.modal-content textarea {
    min-height: 100px;
    resize: vertical;
}

.error-message {
    color: var(--accent-color);
    margin-top: 1rem;
    text-align: center;
}

/* Адаптивность */
@media (max-width: 768px) {
    .admin-container {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
        padding: 1rem 0;
    }

    .sidebar-nav {
        flex-direction: row;
        overflow-x: auto;
    }

    .nav-item {
        padding: 0.5rem 1rem;
        white-space: nowrap;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}