/* Базовые стили */
:root {
    --primary-color: #6c5ce7;
    --primary-gradient: linear-gradient(135deg, #6c5ce7, #a29bfe);
    --secondary-color: #636e72;
    --success-color: #00b894;
    --warning-color: #fdcb6e;
    --danger-color: #e74c3c;
    --info-color: #0984e3;
    --dark-color: #2d3436;
    --light-color: #f8f9fa;
    --border-color: #e9ecef;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --border-radius-large: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* Утилитарные классы */
.d-none {
    display: none !important;
}

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

.center {
    text-align: center;
}

.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Модальные окна */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--border-radius-large) var(--border-radius-large) 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: white;
    opacity: 0.8;
    transition: var(--transition);
}

.close:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Авторизация */
.auth-container {
    padding: 40px;
    text-align: center;
}

.auth-header {
    margin-bottom: 30px;
}

.auth-header i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.auth-header h2 {
    color: var(--dark-color);
    margin: 0;
}

/* Формы */
.form-group {
    margin-bottom: 20px;
    position: relative;
    text-align: left;
}

.form-group.has-icon input {
    padding-left: 50px;
}

.form-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    z-index: 10;
}

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

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    padding: 20px 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    background: var(--light-color);
    border-radius: 0 0 var(--border-radius-large) var(--border-radius-large);
}

/* Кнопки */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    white-space: nowrap;
}

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

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

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

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

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

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

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

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Админ навигация */
.admin-navbar {
    background: white;
    box-shadow: var(--shadow);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-brand i {
    font-size: 28px;
    color: var(--primary-color);
}

.nav-brand h1 {
    font-size: 24px;
    margin: 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 10px;
}

.nav-btn {
    padding: 12px 20px;
    border: none;
    background: transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--secondary-color);
    transition: var(--transition);
    font-weight: 500;
}

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

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

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-user span {
    font-weight: 600;
    color: var(--dark-color);
}

.nav-user button {
    padding: 8px 16px;
    border: none;
    background: var(--danger-color);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.nav-user button:hover {
    background: #c0392b;
    transform: translateY(-1px);
}

/* Секции контента */
.content-section {
    padding: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-header h2 {
    margin: 0;
    color: var(--dark-color);
    font-size: 2rem;
}

/* Статистика */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.stat-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.stat-content h3 {
    font-size: 32px;
    margin: 0 0 5px 0;
    color: var(--dark-color);
}

.stat-content p {
    margin: 0;
    color: var(--secondary-color);
}

/* Таблицы */
.users-table-container,
.projects-table-container,
.overleaf-table-container {
    background: white;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.users-table,
.projects-table,
.overleaf-table {
    width: 100%;
    border-collapse: collapse;
}

.users-table th,
.users-table td,
.projects-table th,
.projects-table td,
.overleaf-table th,
.overleaf-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.users-table th,
.projects-table th,
.overleaf-table th {
    background: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
    position: sticky;
    top: 0;
}

.users-table tr:hover,
.projects-table tr:hover,
.overleaf-table tr:hover {
    background: var(--light-color);
}

.users-table tr:last-child td,
.projects-table tr:last-child td,
.overleaf-table tr:last-child td {
    border-bottom: none;
}

.description-cell {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.loading-cell {
    text-align: center;
    padding: 40px;
}

.empty-cell {
    text-align: center;
    padding: 40px;
}

/* Бейджи */
.role-badge,
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.role-admin {
    background: #e74c3c;
    color: white;
}

.role-manager {
    background: #f39c12;
    color: white;
}

.role-worker {
    background: #3498db;
    color: white;
}

.status-badge.active {
    background: #2ecc71;
    color: white;
}

.status-badge.inactive {
    background: #95a5a6;
    color: white;
}

/* Информация о пользователе */
.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-info i {
    color: var(--info-color);
}

/* Кнопки действий */
.action-buttons {
    display: flex;
    gap: 5px;
    justify-content: center;
}

/* Права доступа */
.permissions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.permission-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.permission-item:hover {
    background: var(--light-color);
}

.permission-item input[type="checkbox"] {
    width: auto;
}

/* Пустые состояния */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--secondary-color);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--border-color);
}

.empty-state h3 {
    margin-bottom: 8px;
    color: var(--dark-color);
}

.empty-state p {
    margin: 0;
}

/* Уведомления */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 2000;
    transform: translateX(100%);
    opacity: 0;
    transition: var(--transition);
    min-width: 300px;
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.success {
    border-left: 4px solid var(--success-color);
}

.notification.success i {
    color: var(--success-color);
}

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

.notification.error i {
    color: var(--danger-color);
}

.notification.warning {
    border-left: 4px solid var(--warning-color);
}

.notification.warning i {
    color: var(--warning-color);
}

.notification.info {
    border-left: 4px solid var(--info-color);
}

.notification.info i {
    color: var(--info-color);
}

/* Лоадер для кнопок */
.loader {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Адаптивность */
@media (max-width: 768px) {
    .admin-navbar {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }
    
    .nav-menu {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-user {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .content-section {
        padding: 15px;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .users-table-container,
    .projects-table-container,
    .overleaf-table-container {
        overflow-x: auto;
    }
    
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .auth-container {
        padding: 20px;
    }
    
    .permissions-grid {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .action-buttons {
        flex-direction: column;
        gap: 3px;
    }
}

@media (max-width: 480px) {
    .content-section {
        padding: 10px;
    }
    
    .modal {
        padding: 10px;
    }
    
    .modal-header {
        padding: 15px 20px;
    }
    
    .form-actions {
        padding: 15px 20px;
    }
    
    .stat-card {
        padding: 20px;
        flex-direction: column;
        text-align: center;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .nav-brand h1 {
        font-size: 20px;
    }
}

/* Прокрутка таблиц */
.users-table-container::-webkit-scrollbar,
.projects-table-container::-webkit-scrollbar,
.overleaf-table-container::-webkit-scrollbar {
    height: 8px;
}

.users-table-container::-webkit-scrollbar-track,
.projects-table-container::-webkit-scrollbar-track,
.overleaf-table-container::-webkit-scrollbar-track {
    background: var(--light-color);
    border-radius: 4px;
}

.users-table-container::-webkit-scrollbar-thumb,
.projects-table-container::-webkit-scrollbar-thumb,
.overleaf-table-container::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

/* Анимации появления */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-card {
    animation: fadeInUp 0.6s ease forwards;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

/* Печать */
@media print {
    .admin-navbar,
    .modal,
    .notification,
    .btn,
    .action-buttons {
        display: none !important;
    }
    
    .content-section {
        padding: 0;
    }
    
    .users-table,
    .projects-table,
    .overleaf-table {
        font-size: 12px;
    }
    
    .users-table th,
    .users-table td,
    .projects-table th,
    .projects-table td,
    .overleaf-table th,
    .overleaf-table td {
        padding: 8px;
        border: 1px solid #000;
    }
}

/* Дополнительные стили для улучшения UX */
.users-table tbody tr,
.projects-table tbody tr,
.overleaf-table tbody tr {
    transition: var(--transition);
}

.modal-content {
    animation: fadeInUp 0.3s ease;
}

.notification {
    animation: slideInRight 0.3s ease;
}

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

/* Hover эффекты для интерактивности */
.users-table tbody tr:hover,
.projects-table tbody tr:hover,
.overleaf-table tbody tr:hover {
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Фокус состояния для доступности */
.btn:focus,
.nav-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Темная тема (опционально) */
@media (prefers-color-scheme: dark) {
    :root {
        --dark-color: #ffffff;
        --light-color: #2d3436;
        --border-color: #636e72;
        --secondary-color: #b2bec3;
    }
    
    body {
        background: linear-gradient(135deg, #2d3436 0%, #636e72 100%);
    }
    
    .modal-content,
    .admin-navbar,
    .stat-card,
    .users-table-container,
    .projects-table-container,
    .overleaf-table-container {
        background: #636e72;
        color: var(--dark-color);
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        background: #2d3436;
        color: var(--dark-color);
        border-color: var(--border-color);
    }
}
/* =================== СТИЛИ ДЛЯ АНАЛИТИКИ ВРЕМЕНИ =================== */

.analytics-filters {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: center;
    flex-wrap: wrap;
    background: var(--light-color);
    padding: 20px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.analytics-filters select {
    min-width: 150px;
}

.analytics-table {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-top: 30px;
}

.analytics-table h3 {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 20px 25px;
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.analytics-table h3::before {
    content: "👥";
    font-size: 20px;
}

.analytics-table .table-container {
    overflow-x: auto;
    max-height: 600px;
}

.analytics-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.analytics-table thead th {
    background: #f8f9fa;
    color: #2d3436;
    font-weight: 600;
    padding: 15px 20px;
    text-align: left;
    border-bottom: 2px solid #dee2e6;
    position: sticky;
    top: 0;
    z-index: 10;
    white-space: nowrap;
}

.analytics-table tbody td {
    padding: 15px 20px;
    border-bottom: 1px solid #f1f3f4;
    vertical-align: middle;
}

.analytics-table tbody tr {
    transition: all 0.2s ease;
}

.analytics-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
}

.analytics-table tbody tr:nth-child(even) {
    background: #fafbfc;
}

.analytics-table tbody tr:nth-child(even):hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.08), rgba(118, 75, 162, 0.08));
}

/* Стили для информации о пользователе */
.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.user-info strong {
    font-size: 15px;
    color: #2d3436;
    font-weight: 600;
}

/* Стили для числовых показателей */
.stat-number {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 15px;
    padding: 6px 12px;
    border-radius: 8px;
    min-width: 60px;
    justify-content: center;
}

.stat-number.tasks {
    background: linear-gradient(135deg, #e84393, #fd79a8);
    background: rgba(232, 67, 147, 0.1);
    color: #e84393;
    border: 1px solid rgba(232, 67, 147, 0.2);
}

.stat-number.hours {
    background: rgba(0, 184, 148, 0.1);
    color: #00b894;
    border: 1px solid rgba(0, 184, 148, 0.2);
}

.stat-number.avg {
    background: rgba(253, 203, 110, 0.1);
    color: #f39c12;
    border: 1px solid rgba(253, 203, 110, 0.2);
}

.stat-number.logs {
    background: rgba(108, 92, 231, 0.1);
    color: #6c5ce7;
    border: 1px solid rgba(108, 92, 231, 0.2);
}

/* Состояния загрузки и пустого состояния */
.loading-cell {
    text-align: center;
    padding: 60px 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f4f6;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.empty-cell {
    text-align: center;
    padding: 40px 20px;
}

.empty-state {
    color: #6c757d;
}

.empty-state i {
    font-size: 48px;
    color: #dee2e6;
    margin-bottom: 15px;
    display: block;
}

.empty-state p {
    margin: 0;
    font-size: 16px;
}

/* Адаптивные стили для аналитики */
@media (max-width: 768px) {
    .analytics-filters {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    
    .analytics-filters select,
    .analytics-filters button {
        width: 100%;
    }
    
    .analytics-table .table-container {
        font-size: 12px;
    }
    
    .analytics-table thead th {
        padding: 12px 10px;
        font-size: 12px;
    }
    
    .analytics-table tbody td {
        padding: 12px 10px;
    }
    
    .user-avatar {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .user-info {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
    
    .stat-number {
        font-size: 13px;
        padding: 4px 8px;
        min-width: 50px;
    }
}

@media (max-width: 480px) {
    .analytics-table h3 {
        padding: 15px;
        font-size: 16px;
    }
    
    .analytics-table thead th {
        padding: 10px 8px;
        font-size: 11px;
    }
    
    .analytics-table tbody td {
        padding: 10px 8px;
    }
    
    .user-avatar {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
    
    .stat-number {
        font-size: 11px;
        padding: 3px 6px;
    }
}

/* Улучшения для общих статистических карточек в аналитике */
#analyticsSection .stats-grid {
    margin-bottom: 30px;
}

#analyticsSection .stat-card {
    transition: all 0.3s ease;
}

#analyticsSection .stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

#analyticsSection .stat-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

/* Стили для улучшенного отображения данных */
.analytics-table tbody tr td:first-child {
    font-weight: 500;
}

.analytics-table tbody tr td:not(:first-child) {
    text-align: center;
}

.analytics-table thead th:first-child {
    text-align: left;
}

.analytics-table thead th:not(:first-child) {
    text-align: center;
}

/* Дополнительные визуальные улучшения */
.analytics-table .table-container::-webkit-scrollbar {
    height: 8px;
}

.analytics-table .table-container::-webkit-scrollbar-track {
    background: #f1f3f4;
    border-radius: 4px;
}

.analytics-table .table-container::-webkit-scrollbar-thumb {
    background: #c1c8cd;
    border-radius: 4px;
}

.analytics-table .table-container::-webkit-scrollbar-thumb:hover {
    background: #a8b2b9;
}