/* ============================================================================
 * AI知识库管理页面样式
 * Phase F · 知音品牌色系 --primary: #F18D24, --secondary: #149EBB
 * ============================================================================ */

/* ==================== 主布局 ==================== */
#kb-container {
    display: flex;
    height: calc(100vh - 60px);
    background: #f5f6f8;
}

/* ==================== 左侧文件列表 ==================== */
.kb-sidebar {
    width: 280px;
    min-width: 280px;
    background: #fff;
    border-right: 1px solid var(--border, #e5e7eb);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.kb-sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border, #e5e7eb);
    background: linear-gradient(135deg, var(--primary, #F18D24), var(--primary-dark, #d97a1f));
    color: #fff;
}

.kb-sidebar-header h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-sidebar-header .kb-file-count {
    font-size: 12px;
    color: rgba(255,255,255,0.75);
    margin-top: 4px;
}

.kb-sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.kb-sidebar-list::-webkit-scrollbar {
    width: 6px;
}

.kb-sidebar-list::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.kb-file-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 16px;
    cursor: pointer;
    transition: background 0.15s;
    border-left: 3px solid transparent;
    position: relative;
}

.kb-file-item:hover {
    background: var(--secondary-light, #e0f7fb);
}

.kb-file-item.active {
    background: var(--secondary-light, #e0f7fb);
    border-left-color: var(--secondary, #149EBB);
}

.kb-file-item .file-icon {
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 1px;
}

.kb-file-item .file-info {
    flex: 1;
    min-width: 0;
}

.kb-file-item .file-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text, #1f2937);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kb-file-item .file-title {
    font-size: 11px;
    color: var(--text-light, #6b7280);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.kb-file-item .file-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--text-light, #9ca3af);
    margin-top: 2px;
}

.kb-file-item .file-version {
    background: var(--primary-light, #fce6c8);
    color: var(--primary-dark, #d97a1f);
    padding: 1px 6px;
    border-radius: 10px;
    font-size: 10px;
    font-weight: 600;
}

.kb-sidebar-actions {
    padding: 10px 16px;
    border-top: 1px solid var(--border, #e5e7eb);
}

.kb-sidebar-actions .btn {
    width: 100%;
    font-size: 12px;
}

/* ==================== 右侧编辑区 ==================== */
.kb-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.kb-editor-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light, #9ca3af);
    font-size: 15px;
}

.kb-editor-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: #fff;
    border-bottom: 1px solid var(--border, #e5e7eb);
    gap: 12px;
}

.kb-editor-toolbar .kb-current-file {
    font-size: 14px;
    font-weight: 600;
    color: var(--text, #1f2937);
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-editor-toolbar .kb-current-file .kb-version-tag {
    font-size: 11px;
    background: var(--primary-light, #fce6c8);
    color: var(--primary-dark, #d97a1f);
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

.kb-editor-toolbar .kb-actions {
    display: flex;
    gap: 8px;
}

.kb-editor-toolbar .btn {
    font-size: 12px;
    padding: 6px 14px;
}

.kb-editor-area {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.kb-editor-textarea {
    flex: 1;
    border: none;
    padding: 20px;
    font-family: 'SF Mono', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
    font-size: 14px;
    line-height: 1.7;
    resize: none;
    outline: none;
    color: var(--text, #1f2937);
    background: #fafbfc;
}

.kb-editor-textarea:focus {
    background: #fff;
}

.kb-editor-preview {
    flex: 1;
    padding: 20px 24px;
    overflow-y: auto;
    border-left: 1px solid var(--border, #e5e7eb);
    background: #fff;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text, #1f2937);
}

.kb-editor-preview h1 { font-size: 22px; margin: 0 0 12px; color: var(--text, #1f2937); }
.kb-editor-preview h2 { font-size: 18px; margin: 20px 0 8px; color: var(--text, #1f2937); border-bottom: 1px solid var(--border, #e5e7eb); padding-bottom: 4px; }
.kb-editor-preview h3 { font-size: 15px; margin: 16px 0 6px; }
.kb-editor-preview p { margin: 6px 0; }
.kb-editor-preview ul, .kb-editor-preview ol { padding-left: 20px; }
.kb-editor-preview li { margin: 2px 0; }
.kb-editor-preview code { background: #f3f4f6; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.kb-editor-preview pre { background: #f3f4f6; padding: 12px 16px; border-radius: 8px; overflow-x: auto; }
.kb-editor-preview blockquote { border-left: 3px solid var(--primary, #F18D24); padding-left: 12px; color: var(--text-light, #6b7280); margin: 8px 0; }
.kb-editor-preview table { border-collapse: collapse; width: 100%; margin: 8px 0; }
.kb-editor-preview th, .kb-editor-preview td { border: 1px solid var(--border, #e5e7eb); padding: 6px 10px; font-size: 13px; }
.kb-editor-preview th { background: #f9fafb; font-weight: 600; }

/* ==================== 版本历史弹窗 ==================== */
.kb-version-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kb-version-dialog {
    background: #fff;
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-xl, 0 20px 60px rgba(0,0,0,0.3));
    width: 520px;
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.kb-version-dialog-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border, #e5e7eb);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kb-version-dialog-header h3 {
    margin: 0;
    font-size: 15px;
    color: var(--text, #1f2937);
}

.kb-version-dialog-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-light, #9ca3af);
    padding: 4px 8px;
    border-radius: 4px;
}

.kb-version-dialog-close:hover {
    background: #f3f4f6;
    color: var(--text, #1f2937);
}

.kb-version-dialog-body {
    flex: 1;
    overflow-y: auto;
    padding: 12px 0;
}

.kb-version-timeline {
    position: relative;
    padding-left: 28px;
}

.kb-version-timeline::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border, #e5e7eb);
}

.kb-version-item {
    position: relative;
    padding: 8px 12px 12px 20px;
}

.kb-version-item::before {
    content: '';
    position: absolute;
    left: -13px;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--secondary, #149EBB);
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--secondary, #149EBB);
}

.kb-version-item:first-child::before {
    background: var(--primary, #F18D24);
    box-shadow: 0 0 0 2px var(--primary, #F18D24);
}

.kb-version-item .version-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.kb-version-item .version-number {
    font-weight: 700;
    color: var(--primary, #F18D24);
}

.kb-version-item .version-date {
    font-size: 11px;
    color: var(--text-light, #9ca3af);
}

.kb-version-item .version-author {
    font-size: 11px;
    color: var(--text-light, #6b7280);
    margin-left: auto;
}

.kb-version-item .version-size {
    font-size: 10px;
    color: var(--text-light, #9ca3af);
    margin-top: 2px;
}

.kb-version-dialog-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border, #e5e7eb);
    text-align: right;
}

/* ==================== Toast 通知 ==================== */
.kb-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    padding: 12px 20px;
    border-radius: var(--radius-md, 10px);
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.08));
    animation: kbToastIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-toast.success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.kb-toast.error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.kb-toast.info {
    background: var(--secondary-light, #e0f7fb);
    color: #0e7490;
    border: 1px solid #a5f3fc;
}

@keyframes kbToastIn {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== 保存状态指示 ==================== */
.kb-saved-indicator {
    font-size: 11px;
    color: var(--text-light, #9ca3af);
    display: flex;
    align-items: center;
    gap: 4px;
}

.kb-saved-indicator.saved {
    color: #059669;
}

.kb-saved-indicator.unsaved {
    color: var(--primary, #F18D24);
}

/* ==================== 新建文档按钮 ==================== */
.kb-new-btn {
    width: 100%;
    padding: 8px 12px;
    border: 1px dashed var(--secondary, #149EBB);
    border-radius: var(--radius-md, 10px);
    background: var(--secondary-light, #e0f7fb);
    color: var(--secondary, #149EBB);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: 8px;
}

.kb-new-btn:hover {
    background: var(--secondary, #149EBB);
    color: #fff;
    border-style: solid;
}

/* ==================== 删除图标 ==================== */
.kb-delete-icon {
    position: absolute;
    top: 8px;
    right: 10px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-size: 12px;
    color: #d1d5db;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s;
}

.kb-file-item:hover .kb-delete-icon {
    opacity: 1;
}

.kb-delete-icon:hover {
    color: #fff;
    background: #ef4444;
}

/* ==================== 新建文档弹窗 ==================== */
.kb-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kb-modal {
    background: #fff;
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-xl, 0 20px 60px rgba(0,0,0,0.3));
    width: 480px;
    max-width: 90vw;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.kb-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border, #e5e7eb);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kb-modal-header h3 {
    margin: 0;
    font-size: 15px;
    color: var(--text, #1f2937);
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-modal-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-light, #9ca3af);
    padding: 4px 8px;
    border-radius: 4px;
}

.kb-modal-close:hover {
    background: #f3f4f6;
    color: var(--text, #1f2937);
}

.kb-modal-body {
    padding: 20px;
}

.kb-form-group {
    margin-bottom: 16px;
}

.kb-form-group:last-child {
    margin-bottom: 0;
}

.kb-form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text, #1f2937);
    margin-bottom: 6px;
}

.kb-filename-input-wrap {
    display: flex;
    align-items: center;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-md, 8px);
    overflow: hidden;
}

.kb-filename-input-wrap input {
    flex: 1;
    border: none;
    padding: 8px 12px;
    font-size: 14px;
    outline: none;
    color: var(--text, #1f2937);
    background: #fafbfc;
}

.kb-filename-input-wrap input:focus {
    background: #fff;
}

.kb-filename-suffix {
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-light, #6b7280);
    background: #f3f4f6;
    font-weight: 500;
    border-left: 1px solid var(--border, #e5e7eb);
}

.kb-form-hint {
    font-size: 11px;
    color: var(--text-light, #9ca3af);
    margin-top: 4px;
}

.kb-form-hint code {
    background: #f3f4f6;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 10px;
}

.kb-form-group textarea {
    width: 100%;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-md, 8px);
    padding: 10px 12px;
    font-family: 'SF Mono', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    color: var(--text, #1f2937);
    background: #fafbfc;
    box-sizing: border-box;
}

.kb-form-group textarea:focus {
    background: #fff;
    border-color: var(--secondary, #149EBB);
}

.kb-modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border, #e5e7eb);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ==================== 删除确认弹窗 ==================== */
.kb-confirm-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kb-confirm-dialog {
    background: #fff;
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-xl, 0 20px 60px rgba(0,0,0,0.3));
    width: 400px;
    max-width: 90vw;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.kb-confirm-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border, #e5e7eb);
}

.kb-confirm-header h3 {
    margin: 0;
    font-size: 15px;
    color: var(--text, #1f2937);
    display: flex;
    align-items: center;
    gap: 8px;
}

.kb-confirm-body {
    padding: 20px;
    text-align: center;
}

.kb-confirm-body p {
    margin: 0 0 4px;
    font-size: 14px;
    color: var(--text, #1f2937);
}

.kb-confirm-body strong {
    color: var(--text, #1f2937);
    word-break: break-all;
}

.kb-confirm-warning {
    font-size: 12px !important;
    color: #ef4444 !important;
    margin-top: 8px !important;
}

.kb-confirm-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border, #e5e7eb);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ==================== 危险按钮 ==================== */
.btn-danger {
    background: #ef4444;
    color: #fff;
    border: 1px solid #ef4444;
    border-radius: var(--radius-md, 8px);
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

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

.btn-danger:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    #kb-container {
        flex-direction: column;
    }

    .kb-sidebar {
        width: 100%;
        min-width: 0;
        max-height: 200px;
    }

    .kb-editor-area {
        flex-direction: column;
    }

    .kb-editor-preview {
        border-left: none;
        border-top: 1px solid var(--border, #e5e7eb);
        max-height: 300px;
    }
}