/* Минималистичный дизайн - чистый и простой */

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

:root {
    --bg-light: #fafafa;
    --bg-white: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --accent: #2563eb;
    --sidebar-bg: #ffffff;
    --hover-bg: #f5f5f5;
    --sidebar-width: 240px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 15px;
}

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

/* Навигация - чистый белый сайдбар */
.navbar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

.navbar::-webkit-scrollbar {
    width: 8px;
}

.navbar::-webkit-scrollbar-track {
    background: transparent;
}

.navbar::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

.navbar::-webkit-scrollbar-thumb:hover {
    background: #999;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1.25rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.nav-brand:hover {
    background-color: var(--hover-bg);
}

.nav-brand i {
    color: var(--accent);
    font-size: 1.75rem;
    flex-shrink: 0;
    line-height: 1;
}

.nav-brand-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1.2;
    gap: 0.1rem;
}

.brand-line-1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.brand-line-2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.nav-menu {
    list-style: none;
    padding: 0.5rem 0;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
}

.nav-menu li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.15s ease;
}

.nav-menu li a:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
    border-left-color: var(--accent);
}

/* Выпадающее меню */
.nav-dropdown {
    position: relative;
}

.nav-dropdown > a {
    justify-content: space-between;
}

.dropdown-icon {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.nav-dropdown.open .dropdown-icon {
    transform: rotate(180deg);
}

.nav-submenu {
    list-style: none;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--bg-light);
    will-change: max-height;
}

.nav-dropdown.open .nav-submenu {
    max-height: 1000px;
}

.nav-submenu li a {
    padding-left: 2.5rem;
    font-size: 0.9rem;
    border-left: 3px solid transparent;
}

.nav-submenu li a:hover {
    background: var(--hover-bg);
    border-left-color: var(--accent);
}

.nav-user {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-white);
    flex-shrink: 0;
    margin-top: auto;
}

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

.nav-user a {
    color: var(--text-secondary);
    text-decoration: none;
}

.nav-user a:hover {
    color: var(--accent);
}

/* Контент */
.content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    background: var(--bg-light);
}

/* Карточки - плоский дизайн без теней */
.stat-card, .card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background: var(--bg-light);
    color: var(--accent);
}

.stat-icon.revenue { color: #10b981; }
.stat-icon.profit { color: #3b82f6; }
.stat-icon.expenses { color: #f59e0b; }
.stat-icon.inventory { color: #8b5cf6; }

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

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

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

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

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
}

table thead {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

table tbody tr:last-child td {
    border-bottom: none;
}

/* Формы - чистый дизайн */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    font-size: 0.9375rem;
    transition: border-color 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Кнопки - плоские без градиентов */
.btn {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-primary);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
}

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

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

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Уведомления - минималистичные */
.alerts {
    margin-bottom: 1.5rem;
}

.alert {
    padding: 0.875rem 1rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid;
    background: var(--bg-white);
    color: var(--text-primary);
}

.alert-success {
    border-left-color: #10b981;
    background: #f0fdf4;
}

.alert-error {
    border-left-color: #ef4444;
    background: #fef2f2;
}

.alert-info {
    border-left-color: var(--accent);
    background: #eff6ff;
}

/* Аутентификация - чистый белый экран */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
}

.auth-card {
    background: var(--bg-white);
    padding: 3rem;
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 420px;
}

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

.auth-header i {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 3rem;
}

.auth-header h1 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
    font-weight: 600;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.auth-footer {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent);
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Dashboard */
.dashboard h1 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.dashboard-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.section {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
}

.section h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Модальные окна - минималистичные */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    padding: 2rem;
    border: 1px solid var(--border-color);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

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

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

/* Адаптивность */
@media (max-width: 768px) {
    .navbar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
}