/* ===================================
   知识库页面专用样式
   AI知识库 - 陈恩
   =================================== */

/* 全局变量 */
:root {
    --knowledge-primary: #3b82f6;
    --knowledge-primary-light: rgba(59, 130, 246, 0.1);
    --knowledge-secondary: #8b5cf6;
    --knowledge-success: #10b981;
    --knowledge-danger: #ef4444;
    --knowledge-warning: #f59e0b;
    --knowledge-bg: #f8fafc;
    --knowledge-card-bg: rgba(255, 255, 255, 0.95);
    --knowledge-text: #1e293b;
    --knowledge-text-light: #64748b;
    --knowledge-border: #e2e8f0;
    --knowledge-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --knowledge-sidebar-width: 500px;
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --knowledge-bg: #0f172a;
        --knowledge-card-bg: rgba(30, 41, 59, 0.95);
        --knowledge-text: #f1f5f9;
        --knowledge-text-light: #94a3b8;
        --knowledge-border: #334155;
    }
}

/* 知识库主体样式 */
.knowledge-body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'LXGW WenKai Screen', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--knowledge-text);
    margin: 0;
    padding: 0;
}

/* 顶部导航栏 */
.knowledge-header {
    background: var(--knowledge-card-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--knowledge-border);
    box-shadow: var(--knowledge-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.back-home {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--knowledge-primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.back-home:hover {
    background: var(--knowledge-primary-light);
    transform: translateX(-4px);
}

.knowledge-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--knowledge-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* 登录/登出按钮 */
.login-btn,
.logout-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.login-btn {
    background: linear-gradient(135deg, var(--knowledge-primary), var(--knowledge-secondary));
    color: white;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}

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

.logout-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

/* 主容器 */
.knowledge-container {
    display: flex;
    max-width: 1400px;
    margin: 2rem auto;
    gap: 2rem;
    padding: 0 2rem;
    min-height: calc(100vh - 200px);
}

/* 左侧边栏 */
.knowledge-sidebar {
    width: var(--knowledge-sidebar-width);
    background: var(--knowledge-card-bg);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    box-shadow: var(--knowledge-shadow);
    padding: 1.5rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--knowledge-border);
    gap: 0.5rem;
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--knowledge-text);
    flex: 1;
}

.sidebar-header .add-btn {
    margin-left: 0;
}

.add-btn {
    background: var(--knowledge-primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-btn:hover {
    background: var(--knowledge-secondary);
    transform: scale(1.1);
}

/* 文档树 */
.doc-tree {
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.doc-tree::-webkit-scrollbar {
    width: 6px;
}

.doc-tree::-webkit-scrollbar-track {
    background: transparent;
}

.doc-tree::-webkit-scrollbar-thumb {
    background: var(--knowledge-border);
    border-radius: 3px;
}

.doc-tree::-webkit-scrollbar-thumb:hover {
    background: var(--knowledge-primary);
}

/* 文件夹容器 - 飞书/思源风格 */
.folder-container {
    margin-bottom: 0.375rem;
}

/* 文件夹元素 */
.doc-tree-folder {
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.25rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--knowledge-text);
    font-weight: 600;
    font-size: 1.5rem;
    user-select: none;
    position: relative;
}

.doc-tree-folder:hover {
    background: var(--knowledge-primary-light);
}

.doc-tree-folder.selected {
    background: rgba(59, 130, 246, 0.15);
    color: var(--knowledge-primary);
}

.doc-tree-folder .expand-icon {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
    color: var(--knowledge-text-light);
    width: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-tree-folder .folder-icon {
    color: var(--knowledge-secondary);
    font-size: 1rem;
}

.doc-tree-folder .folder-name {
    flex: 1;
}

.doc-tree-folder .note-count {
    font-size: 0.8125rem;
    color: var(--knowledge-text-light);
    font-weight: 400;
}

/* 文件夹操作按钮 */
.folder-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.doc-tree-folder:hover .folder-actions {
    opacity: 1;
}

.folder-action-btn {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--knowledge-text-light);
    border-radius: 0.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-size: 0.75rem;
}

.folder-action-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    color: var(--knowledge-primary);
}

.folder-action-btn.delete-folder-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--knowledge-danger);
}

/* 文件夹下的笔记容器 */
.folder-notes {
    margin-left: 1.5rem;
    padding-left: 0.75rem;
    border-left: 2px solid var(--knowledge-border);
    margin-top: 0.25rem;
    margin-bottom: 0.5rem;
}

/* 笔记元素 - 飞书/思源风格 */
.doc-tree-note {
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.125rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--knowledge-text);
    font-size: 0.9375rem;
}

.doc-tree-note:hover {
    background: var(--knowledge-primary-light);
}

.doc-tree-note.active {
    background: var(--knowledge-primary);
    color: white;
}

.doc-tree-note .note-icon {
    font-size: 0.875rem;
    color: var(--knowledge-text-light);
}

.doc-tree-note.active .note-icon {
    color: white;
}

.doc-tree-note .note-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 拖拽样式 */
.doc-tree-note.dragging {
    opacity: 0.5;
    cursor: move;
}

.doc-tree-folder.drag-over {
    background: rgba(59, 130, 246, 0.25) !important;
    border: 2px dashed var(--knowledge-primary);
    transform: scale(1.02);
}

/* 右侧主内容区 */
.knowledge-main {
    flex: 1;
    background: var(--knowledge-card-bg);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    box-shadow: var(--knowledge-shadow);
    padding: 2rem;
    min-height: 500px;
}

/* 欢迎屏幕 */
.welcome-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.welcome-content {
    text-align: center;
    color: var(--knowledge-text-light);
}

.welcome-content i {
    font-size: 4rem;
    color: var(--knowledge-primary);
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.welcome-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin: 1rem 0;
    color: var(--knowledge-text);
}

.welcome-content p {
    font-size: 1.125rem;
    color: var(--knowledge-text-light);
}

/* 笔记显示区域 */
.note-view {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.note-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--knowledge-border);
}

.note-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--knowledge-text);
    margin: 0 0 1rem 0;
}

.note-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--knowledge-text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.note-meta span {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.note-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* 操作按钮 */
.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

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

.edit-btn:hover {
    background: var(--knowledge-secondary);
    transform: translateY(-2px);
}

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

.delete-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

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

.save-btn:hover {
    background: #059669;
    transform: translateY(-2px);
}

.cancel-btn {
    background: var(--knowledge-text-light);
    color: white;
}

.cancel-btn:hover {
    background: var(--knowledge-text);
    transform: translateY(-2px);
}

/* 笔记内容 */
.note-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--knowledge-text);
}

.note-content h1,
.note-content h2,
.note-content h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--knowledge-text);
}

.note-content p {
    margin-bottom: 1rem;
}

.note-content code {
    background: var(--knowledge-primary-light);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875em;
}

.note-content pre {
    background: var(--knowledge-primary-light);
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.note-content pre code {
    background: none;
    padding: 0;
}

/* 笔记编辑区域 */
.note-edit {
    animation: fadeIn 0.4s ease;
}

.edit-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.edit-title {
    flex: 1;
    font-size: 1.5rem;
    font-weight: 600;
    padding: 0.75rem 1rem;
    border: 2px solid var(--knowledge-border);
    border-radius: 0.5rem;
    font-family: inherit;
    color: var(--knowledge-text);
    background: transparent;
    transition: all 0.3s ease;
}

.edit-title:focus {
    outline: none;
    border-color: var(--knowledge-primary);
    box-shadow: 0 0 0 3px var(--knowledge-primary-light);
}

.edit-actions {
    display: flex;
    gap: 0.75rem;
}

.edit-meta {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--knowledge-primary-light);
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meta-label {
    font-weight: 600;
    color: var(--knowledge-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
}

.folder-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--knowledge-border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    color: var(--knowledge-text);
    background: var(--knowledge-card-bg);
    cursor: pointer;
    transition: all 0.3s ease;
}

.folder-select:focus {
    outline: none;
    border-color: var(--knowledge-primary);
    box-shadow: 0 0 0 3px var(--knowledge-primary-light);
}

.folder-select:hover {
    border-color: var(--knowledge-primary);
}

.permission-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.permission-toggle input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.permission-toggle small {
    color: var(--knowledge-text-light);
    margin-left: 0.5rem;
}

.edit-content {
    width: 100%;
    min-height: 400px;
    padding: 1rem;
    border: 2px solid var(--knowledge-border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--knowledge-text);
    background: transparent;
    resize: vertical;
    transition: all 0.3s ease;
}

.edit-content:focus {
    outline: none;
    border-color: var(--knowledge-primary);
    box-shadow: 0 0 0 3px var(--knowledge-primary-light);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--knowledge-card-bg);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-modal-content {
    max-width: 400px;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    color: var(--knowledge-text-light);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.close:hover {
    background: var(--knowledge-danger);
    color: white;
    transform: rotate(90deg);
}

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

.modal-header i {
    font-size: 3rem;
    color: var(--knowledge-primary);
    margin-bottom: 1rem;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--knowledge-text);
}

/* 表单 */
.login-form,
.input-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--knowledge-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--knowledge-border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    color: var(--knowledge-text);
    background: transparent;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--knowledge-primary);
    box-shadow: 0 0 0 3px var(--knowledge-primary-light);
}

.submit-btn {
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--knowledge-primary), var(--knowledge-secondary));
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}

/* Toast 提示 - 参考飞书/思源样式 */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--knowledge-success);
    color: white;
    padding: 1rem 1.75rem;
    border-radius: 0.625rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25), 0 4px 12px rgba(0, 0, 0, 0.15);
    display: none;
    align-items: center;
    gap: 0.75rem;
    z-index: 2000;
    min-width: 320px;
    max-width: 560px;
    font-size: 1rem;
    font-weight: 500;
    animation: toastSlideDown 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(8px);
}

@keyframes toastSlideDown {
    from {
        opacity: 0;
        transform: translate(-50%, -30px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.toast.show {
    display: flex;
}

.toast i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.toast.error {
    background: var(--knowledge-danger);
}

.toast.warning {
    background: var(--knowledge-warning);
}

.toast.info {
    background: #3b82f6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .knowledge-container {
        flex-direction: column;
        gap: 1.5rem;
    }

    .knowledge-sidebar {
        width: 100%;
        position: static;
    }

    .sidebar-header h2 {
        font-size: 1.125rem;
    }

    .doc-tree {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
    }

    .knowledge-title {
        font-size: 1.25rem;
    }

    .knowledge-title span {
        display: none;
    }

    .login-btn span,
    .logout-btn span {
        display: none;
    }

    .knowledge-container {
        padding: 0 1rem;
        margin: 1rem auto;
    }

    .knowledge-main {
        padding: 1.5rem;
    }

    .note-title {
        font-size: 1.5rem;
    }

    .note-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .toast {
        top: 70px;
        min-width: 280px;
        max-width: calc(100vw - 2rem);
        font-size: 0.9375rem;
        padding: 0.875rem 1.5rem;
    }

    .toast i {
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        gap: 0.5rem;
    }

    .back-home span {
        display: none;
    }

    .knowledge-main {
        padding: 1rem;
    }

    .note-title {
        font-size: 1.25rem;
    }

    .edit-header {
        flex-direction: column;
    }

    .edit-actions {
        width: 100%;
        justify-content: stretch;
    }

    .action-btn {
        flex: 1;
    }
}

/* 打印样式 */
@media print {
    .knowledge-header,
    .knowledge-sidebar,
    .note-actions,
    .toast {
        display: none;
    }

    .knowledge-container {
        margin: 0;
        padding: 0;
    }

    .knowledge-main {
        box-shadow: none;
        border-radius: 0;
    }
}