:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    scrollbar-gutter: stable;
    overflow-y: scroll;
}

.stat-container {
    margin: 0 auto;
    padding: 20px 20px 0 20px;
}

.header {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.header h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-button {
    background: var(--secondary-color);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 15px;
    cursor: pointer;
}

.back-button:hover {
    background: #475569;
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

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

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

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

.btn-danger:hover {
    background: #dc2626;
}

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

.btn-success:hover {
    background: #059669;
}

.file-upload, .folder-upload {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 20px;
    background: var(--card-bg);
}

.file-upload:hover, .folder-upload:hover {
    border-color: var(--primary-color);
    background: #f0f7ff;
}

.file-upload input {
    display: none;
}

.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.document-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.document-card.selected {
    border-color: var(--primary-color);
    background: #f0f7ff;
}

.document-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.document-header {
    display: grid;
    grid-template-columns: 1fr 18px;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    min-height: 24px;
}

.document-title {
    font-weight: 600;
    color: var(--primary-color);
    word-break: break-word;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.document-checkbox,
.folder-document-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
    flex-shrink: 0;
    grid-column: 2; /* Всегда во второй колонке */
}

/* Для мобильных устройств */
@media (max-width: 480px) {
    .document-header {
        grid-template-columns: 1fr 20px;
        gap: 10px;
    }

    .document-checkbox,
    .folder-document-checkbox {
        width: 20px;
        height: 20px;
    }
}

.document-meta {
    font-size: 12px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.document-meta div {
    margin-bottom: 4px;
}

.document-actions {
    display: flex;
    gap: 8px;
    margin-top: 15px;
}

.document-action-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: white;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s;
}

.document-action-btn:hover {
    background: var(--bg-color);
}

.document-action-btn.view {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.document-action-btn.delete {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

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

.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--secondary-color);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
}

.stats-bar {
    display: flex;
    width: 100%;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat-item {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    flex: 1;
    min-width: 200px;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--secondary-color);
}

.progress-container {
    margin: 15px 0;
}

.progress-bar {
    height: 20px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 5px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #3b82f6);
    width: 0%;
    transition: width 0.5s ease-in-out;
    border-radius: 10px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--secondary-color);
}

#upload-progress {
    margin: 20px 0;
    padding: 15px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #f8fafc;
}

#current-file {
    margin-top: 10px;
    font-size: 12px;
    color: #64748b;
    font-style: italic;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 20px;
    border-radius: 12px;
    width: 80%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

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

.chunk-list {
    margin-top: 15px;
}

.no-chunks {
    text-align: center;
    padding: 20px;
    color: #666;
    font-style: italic;
}

.chunk-item {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
    background: #f8fafc;
}

.chunk-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-weight: bold;
    color: #2d3748;
}

.chunk-text {
    background: white;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    max-height: 200px;
    overflow-y: auto;
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-word;
}

.btn-info {
    background-color: #17a2b8;
    border-color: #17a2b8;
    color: white;
}

.btn-info:hover {
    background-color: #138496;
    border-color: #117a8b;
}

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

.btn-warning:hover {
    background-color: #e0a800;
    border-color: #d39e00;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.tabs {
    display: flex;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 0 20px 0 20px;
}

.tab-btn {
    flex: 1;
    padding: 15px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    border-bottom: 3px solid transparent;
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-bottom-color: var(--primary-color);
}

.tab-btn:not(.active):hover {
    background: #71ade3;
}

.tab-pane {
    display: none;
    margin: 20px;
}

.tab-pane.active {
    display: block;
}

.folder-management {
    margin-top: 20px;
}

.create-folder {
    margin: 20px 0;
    display: flex;
    gap: 10px;
}

.error-message {
    color: #e53e3e;
    margin-bottom: 15px;
    padding: 8px;
    background-color: #fed7d7;
    border-radius: 4px;
}

.folders-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
    align-items: stretch;
}

.folder-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 200px;
}

.folder-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.folder-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.folder-card:hover::before {
    opacity: 1;
}

.folder-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #f0f7ff, #ffffff);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
}

.folder-card.selected::before {
    opacity: 1;
}

.folder-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-shrink: 0;
}

.folder-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.folder-checkbox:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.folder-checkbox:indeterminate {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.folder-checkbox:indeterminate::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 2px;
    background: white;
    transform: translate(-50%, -50%);
}

.folder-name {
    font-weight: 700;
    color: var(--text-color);
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-grow: 1;
}

.folder-name::before {
    content: '📁';
    font-size: 20px;
}

.folder-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-color);
    border-radius: 12px;
    flex-grow: 1;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--secondary-color);
    line-height: 1.4;
}

.meta-value {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 16px;
    margin-left: auto;
}

.folder-actions {
    display: flex;
    gap: 8px;
    width: 100%;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    flex-shrink: 0;
    justify-content: center;
}

.folder-action-btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

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

.folder-action-btn.primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

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

.folder-action-btn.danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.folder-action-btn.btn-small {
    padding: 8px 12px;
    font-size: 12px;
}

.upload-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.upload-container .file-upload,
.upload-container .folder-upload {
    flex: 1;
    min-width: 300px;
}

.folder-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border: 1px solid #ddd;
    margin-bottom: 10px;
    border-radius: 4px;
}

.years-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.year-card {
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 15px;
    background: white;
    transition: all 0.3s ease;
}

.year-card.selected {
    border-color: #2563eb;
    background: #f0f7ff;
}

.year-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.year-title {
    font-size: 1.2em;
    font-weight: bold;
    color: #1f2937;
}

.year-stats {
    margin-bottom: 10px;
}

.stat {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
}

.stat-label {
    color: #6b7280;
}

.stat-value {
    font-weight: bold;
    color: #1f2937;
}

.years-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.years-stats-bar {
    display: flex;
    width: 100%;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.chat-container .sidebar-section .file-upload {
    width: 100%;
    margin-bottom: 15px;
}

.folder-card.loading {
    opacity: 0.7;
    pointer-events: none;
}

.folder-card.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@media (max-width: 768px) {
    .documents-grid,
    .folders-grid,
    .years-grid {
        grid-template-columns: 1fr;
    }

    .stats-bar,
    .years-stats-bar {
        flex-direction: column;
    }

    .stat-item {
        min-width: auto;
    }

    .upload-container {
        flex-direction: column;
    }

    .upload-container .file-upload,
    .upload-container .folder-upload {
        min-width: auto;
    }

    .folder-card {
        padding: 20px;
        min-height: 180px;
    }

    .folders-grid {
        gap: 16px;
    }

    .folder-meta {
        padding: 12px;
        gap: 10px;
    }

    .folder-actions {
        flex-direction: column;
        gap: 8px;
    }

    .folder-action-btn {
        flex: none;
        width: 100%;
    }

    .folder-name {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .folder-card {
        padding: 16px;
        min-height: 160px;
    }

    .folder-header {
        gap: 12px;
        margin-bottom: 12px;
    }

    .folder-name {
        font-size: 15px;
    }

    .meta-value {
        font-size: 14px;
    }
}

.upload-progress-container {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
}

.upload-progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.upload-progress-header h4 {
    margin: 0;
    color: #2d3748;
}

.upload-progress-text {
    font-weight: bold;
    color: #4a5568;
}

.upload-progress-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 15px;
}

.upload-progress-fill {
    height: 100%;
    background: #4299e1;
    transition: width 0.3s ease;
}

.upload-file-list {
    max-height: 300px;
    overflow-y: auto;
}

.upload-file-item {
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    margin-bottom: 8px;
    background: white;
}

.upload-file-item.processing {
    border-left: 4px solid #4299e1;
}

.upload-file-item.success {
    border-left: 4px solid #38a169;
}

.upload-file-item.error {
    border-left: 4px solid #e53e3e;
}

.upload-file-item.warning {
    border-left: 4px solid #d69e2e;
}

.file-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.file-name {
    font-weight: 500;
    color: #2d3748;
}

.file-status {
    font-size: 0.875rem;
    font-weight: 500;
}

.file-progress-bar {
    width: 100%;
    height: 4px;
    background: #e2e8f0;
    border-radius: 2px;
    overflow: hidden;
}

.file-progress-fill {
    height: 100%;
    background: #4299e1;
    transition: width 0.3s ease, background 0.3s ease;
}

.upload-progress-container {
    max-height: 600px;
    overflow-y: auto;
    overflow-x: hidden;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 15px;
    background: #f8fafc;
    margin-bottom: 20px;
    box-sizing: border-box;
    width: 100%;
}

.upload-file-item {
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 6px;
    background: white;
    border: 1px solid #e2e8f0;
    transition: background-color 0.3s ease;
    box-sizing: border-box;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-file-item.processing {
    border-left: 3px solid #3182ce;
}

.upload-file-item.success {
    border-left: 3px solid #38a169;
    background: #f0fff4;
}

.upload-file-item.error {
    border-left: 3px solid #e53e3e;
    background: #fff5f5;
}

.upload-file-item.warning {
    border-left: 3px solid #d69e2e;
    background: #fffaf0;
}

/* Убираем трансформации и тени, которые вызывают горизонтальную прокрутку */
.upload-file-item.current-processing {
    /* Вместо transform и box-shadow используем только изменение фона */
    background-color: #f0f9ff !important;
}