/* ===================================================
   Knowledge Sources — Styles
   =================================================== */

/* Split Layout */
.knowledge-split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
    min-height: 0;
}

/* Shared Panel Card */
.knowledge-panel-card {
    background: var(--card-bg, var(--surface));
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* Light mode: use a darker border for contrast */
:root .knowledge-panel-card,
[data-theme="light"] .knowledge-panel-card {
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.06);
}

/* Dark mode: light border glow */
[data-theme="dark"] .knowledge-panel-card {
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.06);
}

/* Left Panel — Document Browser */
.knowledge-browser-panel {
    min-width: 0;
}

.knowledge-browser-panel .knowledge-panel-card {
    max-height: calc(100vh - 180px);
    display: flex;
    flex-direction: column;
}

.knowledge-browser-panel .knowledge-list {
    flex: 1;
    overflow-y: auto;
    min-height: 100px;
    padding-right: 0.25rem;
}

.knowledge-browser-panel .knowledge-list::-webkit-scrollbar {
    width: 5px;
}
.knowledge-browser-panel .knowledge-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
.knowledge-browser-panel .knowledge-list::-webkit-scrollbar-track {
    background: transparent;
}

/* Right Panel — Upload */
.knowledge-upload-panel {
    min-width: 0;
    position: sticky;
    top: 1rem;
}

/* Search Bar */
.knowledge-search-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    transition: border-color 0.2s;
}

.knowledge-search-bar:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.knowledge-search-bar svg {
    color: var(--text-secondary);
    flex-shrink: 0;
    opacity: 0.5;
}

.knowledge-search-input {
    flex: 1;
    border: none;
    background: none;
    color: var(--text);
    font-size: 0.85rem;
    font-family: inherit;
    outline: none;
}

.knowledge-search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Upload Card (legacy compat) */
.knowledge-upload-area {
    margin-bottom: 2rem;
}

.knowledge-upload-card {
    background: var(--card-bg, var(--surface));
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.5rem;
}

/* Panel header accent line */
.knowledge-upload-header,
.knowledge-list-header {
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.25rem;
}

.knowledge-upload-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    color: var(--text);
}

.knowledge-upload-header svg {
    color: var(--accent);
    flex-shrink: 0;
}

.knowledge-upload-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

/* Form Fields */
.knowledge-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.knowledge-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.knowledge-field label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.knowledge-field .required {
    color: #ef4444;
}

.knowledge-field .optional {
    font-weight: 400;
    opacity: 0.6;
}

.knowledge-input {
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.knowledge-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Content Tabs */
.knowledge-content-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.knowledge-tab {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

.knowledge-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.knowledge-tab-content {
    display: none;
}

.knowledge-tab-content.active {
    display: block;
}

/* Textarea */
.knowledge-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.88rem;
    font-family: 'JetBrains Mono', monospace;
    line-height: 1.5;
    resize: vertical;
    min-height: 160px;
    transition: border-color 0.2s;
}

.knowledge-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Dropzone */
.knowledge-dropzone {
    border: 2px dashed var(--border);
    border-radius: 10px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.knowledge-dropzone:hover,
.knowledge-dropzone.drag-over {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.04);
}

.knowledge-dropzone svg {
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.knowledge-dropzone p {
    margin: 0.3rem 0;
    font-size: 0.9rem;
}

.knowledge-dropzone-hint {
    font-size: 0.78rem !important;
    opacity: 0.6;
}

.knowledge-file-hidden {
    display: none;
}

/* Multi-file list */
.knowledge-file-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-top: 0.5rem;
    max-height: 220px;
    overflow-y: auto;
}

.knowledge-file-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.7rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
    transition: opacity 0.2s, border-color 0.3s;
}

.knowledge-file-item.uploading {
    opacity: 0.6;
    border-color: var(--accent);
}

.knowledge-file-item.uploaded {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.06);
}

.knowledge-file-item.upload-failed {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.06);
}

.knowledge-file-item.upload-duplicate {
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.06);
}

.knowledge-file-item.upload-duplicate::after {
    content: 'Duplicate';
    font-size: 0.7rem;
    color: #f59e0b;
    margin-left: auto;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    background: rgba(245, 158, 11, 0.12);
    font-weight: 600;
}

.knowledge-file-item-icon {
    flex-shrink: 0;
    font-size: 1rem;
}

.knowledge-file-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
    color: var(--text);
}

.knowledge-file-item-size {
    flex-shrink: 0;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.knowledge-file-item-remove {
    background: none;
    border: none;
    font-size: 1.15rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0 0.2rem;
    line-height: 1;
    flex-shrink: 0;
}

.knowledge-file-item-remove:hover {
    color: #ef4444;
}

/* File Preview (legacy — kept for compat) */
.knowledge-file-preview {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-top: 0.5rem;
}

.knowledge-file-name {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.knowledge-file-size {
    font-size: 0.78rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.knowledge-file-clear {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
}

.knowledge-file-clear:hover {
    color: #ef4444;
}

/* Char Count */
.knowledge-char-count {
    flex-direction: row !important;
    align-items: center;
    gap: 0.5rem !important;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.knowledge-char-limit {
    opacity: 0.6;
}

/* Upload Button */
.knowledge-upload-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    align-self: flex-start;
}

.knowledge-upload-btn:hover:not(:disabled) {
    background: var(--accent-hover, #2563eb);
    transform: translateY(-1px);
}

.knowledge-upload-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.knowledge-upload-btn .spinner-sm {
    width: 14px;
    height: 14px;
}

/* Documents List Section */
.knowledge-list-section {
    margin-top: 1rem;
}

.knowledge-list-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0;
    padding-bottom: 0;
}

.knowledge-list-header svg {
    color: var(--accent);
    flex-shrink: 0;
}

.knowledge-list-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text);
    white-space: nowrap;
}

.knowledge-doc-count {
    font-size: 0.78rem;
    color: var(--text-secondary);
    background: var(--surface);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    border: 1px solid var(--border);
}

.knowledge-refresh-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.35rem 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    transition: all 0.2s;
}

.knowledge-refresh-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Loading / Error */
.knowledge-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.knowledge-error {
    padding: 0.75rem 1rem;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    color: #ef4444;
    font-size: 0.88rem;
    margin-bottom: 1rem;
}

/* Empty State */
.knowledge-empty {
    text-align: center;
    padding: 2.5rem 1.25rem;
    color: var(--text-secondary);
}

.knowledge-empty svg {
    opacity: 0.25;
    margin-bottom: 0.75rem;
}

.knowledge-empty h3 {
    font-size: 0.95rem;
    margin: 0 0 0.35rem;
    color: var(--text);
}

.knowledge-empty p {
    font-size: 0.82rem;
    margin: 0;
    max-width: 280px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Knowledge Document Card */
.knowledge-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.knowledge-doc-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 1.15rem;
    background: var(--card-bg, var(--surface));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    transition: all 0.2s;
}

:root .knowledge-doc-card,
[data-theme="light"] .knowledge-doc-card {
    border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .knowledge-doc-card {
    border-color: rgba(255, 255, 255, 0.08);
}

.knowledge-doc-card:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.knowledge-doc-icon {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: rgba(59, 130, 246, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.knowledge-doc-info {
    flex: 1;
    min-width: 0;
}

.knowledge-doc-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.knowledge-doc-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.knowledge-doc-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.knowledge-doc-tags {
    display: flex;
    gap: 0.35rem;
    margin-top: 0.4rem;
    flex-wrap: wrap;
}

.knowledge-tag {
    font-size: 0.72rem;
    padding: 0.12rem 0.45rem;
    background: rgba(59, 130, 246, 0.08);
    color: var(--accent);
    border-radius: 4px;
    font-weight: 500;
}

/* File Type Badge */
.knowledge-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.1rem 0.45rem;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.1);
    color: #6366f1;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

/* Status Pill */
.knowledge-status {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.1rem 0.5rem;
    border-radius: 10px;
    white-space: nowrap;
}

.knowledge-status.status-ready {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.knowledge-status.status-processing {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    animation: pulse-status 1.5s ease-in-out infinite;
}

.knowledge-status.status-failed {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

@keyframes pulse-status {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.knowledge-doc-actions {
    flex-shrink: 0;
    display: flex;
    gap: 0.35rem;
}

.knowledge-doc-delete {
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.35rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
}

.knowledge-doc-delete:hover {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.06);
}

/* Download button in doc card actions */
.knowledge-doc-download {
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.35rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.knowledge-doc-download:hover {
    color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.06);
}

/* Download link in meta row */
.knowledge-download-link {
    color: #3b82f6;
    text-decoration: none;
    transition: color 0.2s;
}

.knowledge-download-link:hover {
    color: #60a5fa;
    text-decoration: underline;
}

/* RAG indicator in chat header */
.rag-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.72rem;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    font-weight: 500;
    margin-left: 0.5rem;
}

.rag-indicator svg {
    width: 12px;
    height: 12px;
}

/* Responsive */
@media (max-width: 900px) {
    .knowledge-split-layout {
        grid-template-columns: 1fr;
    }

    .knowledge-browser-panel .knowledge-panel-card {
        max-height: 50vh;
    }

    .knowledge-upload-panel {
        position: static;
    }
}

@media (max-width: 640px) {
    .knowledge-upload-card,
    .knowledge-panel-card {
        padding: 1rem;
    }

    .knowledge-doc-card {
        flex-direction: column;
        gap: 0.75rem;
    }

    .knowledge-doc-actions {
        align-self: flex-end;
    }
}