/**
 * 演示页面样式
 * 包含编辑器、差异显示等样式
 * @author daichangya
 */

/* 演示区域 */
.demo-section {
    padding: var(--spacing-lg) 0 var(--spacing-2xl);
    background: var(--color-bg);
    min-height: calc(100vh - 80px); /* 占据视口高度减去导航栏 */
    margin-top: 60px; /* 为固定导航栏留出空间 */
}

.demo-header {
    margin-bottom: var(--spacing-lg);
}

.demo-title-bar {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.demo-main-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.demo-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 0;
}

.demo-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.demo-toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    padding: var(--spacing-md);
    background: var(--color-bg-light);
    border-radius: var(--border-radius-lg);
}

.mode-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mode-selector label {
    font-weight: 500;
    color: var(--color-text);
}

.mode-selector select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.mode-selector select:hover {
    border-color: var(--color-primary);
}

.mode-selector select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 统计信息 */
.diff-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-left: auto;
    align-items: center;
}

.shortcut-hint {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-left: var(--spacing-md);
    font-family: var(--font-mono);
}

.stat-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.stat-added {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.stat-removed {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.stat-unchanged {
    background: rgba(107, 114, 128, 0.1);
    color: var(--color-text-light);
}

/* 演示容器 */
.demo-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.demo-editors {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

/* 编辑器面板 */
.editor-panel {
    display: flex;
    flex-direction: column;
}

.editor-label {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.95rem;
}

.editor-textarea {
    width: 100%;
    min-height: 400px;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    resize: vertical;
    background: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
}

.editor-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.editor-textarea::placeholder {
    color: var(--color-text-light);
    opacity: 0.6;
}

/* 差异结果显示 */
.demo-result {
    display: flex;
    flex-direction: column;
}

.diff-result {
    min-height: 300px;
    max-height: 600px;
    overflow-y: auto;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg-light);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--color-text);
}

/* 差异高亮样式 */
.diff-result .diff-added {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
    text-decoration: none;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 500;
}

.diff-result .diff-removed {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
    text-decoration: line-through;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 500;
}

/* 动画效果 */
.diff-result .diff-added,
.diff-result .diff-removed {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-2px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .demo-editors {
        grid-template-columns: 1fr;
    }
    
    .editor-textarea {
        min-height: 250px;
    }
}

@media (max-width: 768px) {
    .demo-section {
        padding: var(--spacing-lg) 0;
        min-height: auto;
        margin-top: 55px; /* 移动端导航栏可能更小 */
    }
    
    .demo-main-title {
        font-size: 1.75rem;
    }
    
    .demo-subtitle {
        font-size: 0.95rem;
    }
    
    .demo-header h2 {
        font-size: 1.5rem;
    }
    
    .demo-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .shortcut-hint {
        display: none;
    }
    
    .mode-selector {
        width: 100%;
    }
    
    .mode-selector select {
        flex: 1;
        width: 100%;
    }
    
    .diff-stats {
        margin-left: 0;
        justify-content: center;
    }
    
    .editor-textarea {
        min-height: 200px;
        font-size: 0.85rem;
    }
    
    .diff-result {
        font-size: 0.85rem;
        max-height: 400px;
    }
    
    .demo-editors {
        gap: var(--spacing-md);
    }
}

/* 滚动条样式 */
.diff-result::-webkit-scrollbar,
.editor-textarea::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.diff-result::-webkit-scrollbar-track,
.editor-textarea::-webkit-scrollbar-track {
    background: var(--color-bg-light);
    border-radius: 4px;
}

.diff-result::-webkit-scrollbar-thumb,
.editor-textarea::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.diff-result::-webkit-scrollbar-thumb:hover,
.editor-textarea::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}