/* Простой и понятный дизайн */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #5DCEC6;
    --primary-dark: #4BB5AD;
    --text: #2D3748;
    --text-light: #718096;
    --bg: #F7FAFC;
    --white: #FFFFFF;
    --border: #E2E8F0;
    --success: #48BB78;
    --warning: #ED8936;
    --danger: #F56565;
}

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

body {
    font-family: 'Open Sans', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Контейнер */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

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

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Карточки */
.card {
    background: var(--white);
    border-radius: 4px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
}

/* Навигация */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

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

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    color: var(--text-light);
    font-weight: 500;
}

/* Сайдбар */
.sidebar {
    background: var(--white);
    border-right: 1px solid var(--border);
    width: 250px;
    min-height: calc(100vh - 80px);
    padding: 24px 0;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-item {
    margin-bottom: 4px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 0 4px 4px 0;
    margin-right: 16px;
    transition: all 0.2s;
}

.sidebar-link:hover {
    background: rgba(93, 206, 198, 0.1);
    color: var(--primary);
}

.sidebar-link.active {
    background: var(--primary);
    color: white;
}

/* Основной контент */
.main-content {
    flex: 1;
    padding: 24px;
}

.page-header {
    margin-bottom: 32px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--text-light);
}

/* Сетка */
.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Статистика */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--white);
    border-radius: 4px;
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    color: white;
}

.stat-icon.primary {
    background: var(--primary);
}

.stat-icon.success {
    background: var(--success);
}

.stat-icon.warning {
    background: var(--warning);
}

.stat-icon.info {
    background: #4299E1;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.stat-label {
    color: var(--text-light);
    font-weight: 500;
}

/* Таблицы */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.table th,
.table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

.table tr:hover {
    background: rgba(93, 206, 198, 0.05);
}

/* Алерты */
.alert {
    padding: 16px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(72, 187, 120, 0.1);
    border-color: var(--success);
    color: #22543D;
}

.alert-warning {
    background: rgba(237, 137, 54, 0.1);
    border-color: var(--warning);
    color: #C05621;
}

.alert-danger {
    background: rgba(245, 101, 101, 0.1);
    border-color: var(--danger);
    color: #742A2A;
}

.alert-info {
    background: rgba(93, 206, 198, 0.1);
    border-color: var(--primary);
    color: #234E52;
}

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

.text-muted {
    color: var(--text-light);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

/* Адаптивность */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        min-height: auto;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .navbar-content {
        flex-direction: column;
        gap: 16px;
    }
    
    .main-content {
        padding: 16px;
    }
}