/**
 * Append History Panel Styles
 * 
 * 第二阶段T2.5任务：追加历史记录面板样式
 * 提供历史记录查看、搜索、恢复和管理的完整UI样式
 * 
 * @version 2.0.0
 * @author Phase Two Implementation - T2.5
 */

/* ==========================================================================
   历史面板容器
   ========================================================================== */

.append-history-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    height: 100vh;
    background: var(--bg-color, #ffffff);
    border-left: 1px solid var(--border-color, #e2e8f0);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    font-family: var(--font-family, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
}

.append-history-panel.show {
    transform: translateX(0);
}

/* ==========================================================================
   面板头部
   ========================================================================== */

.history-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-secondary, #f8fafc);
    border-bottom: 1px solid var(--border-color, #e2e8f0);
    min-height: 60px;
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-icon {
    font-size: 20px;
}

.title-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary, #1e293b);
}

.panel-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.panel-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary, #64748b);
    cursor: pointer;
    transition: all 0.2s ease;
}

.panel-action-btn:hover {
    background: var(--bg-hover, #f1f5f9);
    color: var(--text-primary, #334155);
}

.panel-action-btn:active {
    transform: scale(0.95);
}

.panel-action-btn .material-icons {
    font-size: 18px;
}

/* ==========================================================================
   工具栏
   ========================================================================== */

.history-panel-toolbar {
    padding: 12px 20px;
    background: var(--bg-color, #ffffff);
    border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.search-container {
    position: relative;
    margin-bottom: 12px;
}

.history-search-input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 6px;
    background: var(--bg-color, #ffffff);
    color: var(--text-primary, #1e293b);
    font-size: 14px;
    transition: all 0.2s ease;
}

.history-search-input:focus {
    outline: none;
    border-color: var(--primary-color, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.history-search-input::placeholder {
    color: var(--text-secondary, #94a3b8);
}

.search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary, #94a3b8);
    font-size: 18px;
    pointer-events: none;
}

.history-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary, #64748b);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ==========================================================================
   面板内容
   ========================================================================== */

.history-panel-content {
    flex: 1;
    overflow-y: auto;
    background: var(--bg-color, #ffffff);
}

.history-list {
    padding: 0;
}

.history-items {
    padding: 8px 0;
}

/* ==========================================================================
   历史项目
   ========================================================================== */

.history-item {
    margin: 0 12px 8px;
    padding: 12px;
    background: var(--bg-color, #ffffff);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.history-item:hover {
    border-color: var(--border-hover, #cbd5e1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.history-item:last-child {
    margin-bottom: 0;
}

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

.item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.item-id {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #1e293b);
}

.item-time {
    font-size: 11px;
    color: var(--text-secondary, #64748b);
    font-family: var(--font-mono, 'SF Mono', Monaco, monospace);
}

.item-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.history-item:hover .item-actions {
    opacity: 1;
}

.item-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 12px;
}

.item-action-btn:hover {
    background: var(--bg-hover, #f1f5f9);
    transform: scale(1.1);
}

.item-action-btn:active {
    transform: scale(0.95);
}

.item-content {
    margin-bottom: 8px;
}

.content-preview {
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-secondary, #64748b);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.item-stats {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    color: var(--text-tertiary, #94a3b8);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 2px;
}

/* ==========================================================================
   空状态
   ========================================================================== */

.history-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary, #64748b);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.empty-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary, #1e293b);
}

.empty-hint {
    font-size: 14px;
    color: var(--text-secondary, #64748b);
    margin: 0;
}

/* ==========================================================================
   面板底部
   ========================================================================== */

.history-panel-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg-secondary, #f8fafc);
    border-top: 1px solid var(--border-color, #e2e8f0);
    min-height: 48px;
}

.footer-info {
    font-size: 11px;
    color: var(--text-tertiary, #94a3b8);
}

.footer-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 4px;
    background: var(--bg-color, #ffffff);
    color: var(--text-secondary, #64748b);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.footer-btn:hover {
    background: var(--bg-hover, #f1f5f9);
    color: var(--text-primary, #334155);
}

.footer-btn .material-icons {
    font-size: 14px;
}

/* ==========================================================================
   预览模态框
   ========================================================================== */

.history-preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.history-preview-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background: var(--bg-color, #ffffff);
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.history-preview-modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: var(--bg-secondary, #f8fafc);
    border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary, #1e293b);
}

.modal-close-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary, #64748b);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    background: var(--bg-hover, #f1f5f9);
    color: var(--text-primary, #334155);
}

.modal-body {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.preview-info {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-secondary, #f8fafc);
    border-radius: 8px;
    font-size: 14px;
}

.preview-info p {
    margin: 0 0 8px 0;
    color: var(--text-secondary, #64748b);
}

.preview-info p:last-child {
    margin-bottom: 0;
}

.preview-info strong {
    color: var(--text-primary, #1e293b);
}

.preview-content {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary, #1e293b);
}

.preview-content.markdown-body {
    /* 继承markdown样式 */
    font-size: inherit;
    line-height: inherit;
}

.empty-content {
    color: var(--text-secondary, #64748b);
    font-style: italic;
    text-align: center;
    padding: 20px;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
    padding: 20px 24px;
    background: var(--bg-secondary, #f8fafc);
    border-top: 1px solid var(--border-color, #e2e8f0);
}

.modal-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-btn.secondary {
    background: var(--bg-color, #ffffff);
    color: var(--text-secondary, #64748b);
}

.modal-btn.secondary:hover {
    background: var(--bg-hover, #f1f5f9);
    color: var(--text-primary, #334155);
}

.modal-btn.primary {
    background: var(--primary-color, #3b82f6);
    color: white;
    border-color: var(--primary-color, #3b82f6);
}

.modal-btn.primary:hover {
    background: var(--primary-hover, #2563eb);
    border-color: var(--primary-hover, #2563eb);
}

/* ==========================================================================
   响应式设计
   ========================================================================== */

@media (max-width: 768px) {
    .append-history-panel {
        width: 100%;
        right: 0;
    }
    
    .history-panel-header {
        padding: 12px 16px;
    }
    
    .history-panel-toolbar {
        padding: 8px 16px;
    }
    
    .history-item {
        margin: 0 8px 6px;
        padding: 10px;
    }
    
    .item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    
    .item-actions {
        opacity: 1;
        align-self: flex-end;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .history-panel-header {
        padding: 8px 12px;
    }
    
    .title-text {
        font-size: 14px;
    }
    
    .history-panel-toolbar {
        padding: 6px 12px;
    }
    
    .history-item {
        margin: 0 6px 4px;
        padding: 8px;
    }
    
    .item-id {
        font-size: 12px;
    }
    
    .item-time {
        font-size: 10px;
    }
    
    .content-preview {
        font-size: 12px;
    }
}

/* ==========================================================================
   深色模式支持
   ========================================================================== */

@media (prefers-color-scheme: dark) {
    .append-history-panel {
        --bg-color: #0f172a;
        --bg-secondary: #1e293b;
        --bg-hover: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --text-tertiary: #64748b;
        --border-color: #334155;
        --border-hover: #475569;
        --primary-color: #3b82f6;
        --primary-hover: #2563eb;
    }
    
    .modal-backdrop {
        background: rgba(0, 0, 0, 0.7);
    }
}

/* ==========================================================================
   高对比度模式支持
   ========================================================================== */

@media (prefers-contrast: high) {
    .append-history-panel {
        border-left-width: 2px;
    }
    
    .history-item {
        border-width: 2px;
    }
    
    .history-search-input {
        border-width: 2px;
    }
    
    .modal-btn {
        border-width: 2px;
    }
}

/* ==========================================================================
   减少动画模式支持
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .append-history-panel,
    .history-preview-modal,
    .modal-content,
    .history-item,
    .item-action-btn,
    .panel-action-btn,
    .footer-btn,
    .modal-btn {
        transition: none;
    }
    
    .item-actions {
        opacity: 1;
    }
}

/* ==========================================================================
   打印样式
   ========================================================================== */

@media print {
    .append-history-panel {
        display: none;
    }
}