/* Apple风格设计 - 全局样式 */
:root {
    /* 现代简约色彩系统 */
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #A5B4FC;
    --color-secondary: #8B5CF6;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    
    /* 精致中性色调 */
    --color-label: #111827;
    --color-secondary-label: #6B7280;
    --color-tertiary-label: #9CA3AF;
    --color-quaternary-label: #D1D5DB;
    
    /* 层次背景色 */
    --color-system-background: #FFFFFF;
    --color-secondary-system-background: #F9FAFB;
    --color-tertiary-system-background: #F3F4F6;
    --color-grouped-background: #F9FAFB;
    --color-secondary-grouped-background: #FFFFFF;
    
    /* 精致分隔线和边框 */
    --color-separator: #E5E7EB;
    --color-opaque-separator: #D1D5DB;
    --color-border-light: #F3F4F6;
    
    /* 阴影 */
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 圆角 */
    --radius-small: 6px;
    --radius-medium: 10px;
    --radius-large: 16px;
    --radius-xl: 20px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 14px;
    --spacing-lg: 24px;
    --spacing-xl: 36px;
    --spacing-2xl: 48px;
    --spacing-3xl: 60px;
}



* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    color: var(--color-label);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
    font-weight: 400;
    overflow-x: hidden;
    width: 100%;
    display: flex;
    flex-direction: column;
}

.container {
    width: 90%;
    max-width: 1200px !important;
    margin: var(--spacing-sm) auto;
    padding: var(--spacing-md);
    background: var(--color-system-background);
    border-radius: var(--radius-large);
    flex: 1;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    position: relative;
}

.header-icon {
    margin-bottom: var(--spacing-xs);
    display: inline-block;
}

header h1 {
    color: var(--color-label);
    font-size: 1.9rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.025em;
    line-height: 1.2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.title-main {
    color: var(--color-primary);
}

.title-badge {
    background: var(--color-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.subtitle {
    color: var(--color-secondary-label);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.4;
    max-width: 450px;
    margin: 0 auto var(--spacing-xs);
}

.feature-tags {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: nowrap;
    margin-top: var(--spacing-md);
}

.tag {
    background: var(--color-secondary-system-background);
    color: var(--color-secondary-label);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--color-separator);
    white-space: nowrap;
}

.tag:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-color: var(--color-primary-light);
}

/* 主要内容区域 */
main {
    display: grid;
    gap: var(--spacing-lg);
}

/* 区块标题 */
h2 {
    color: var(--color-label);
    font-size: 1.625rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.015em;
    line-height: 1.3;
}

/* 输入区域 */
.input-section {
    margin-bottom: 0;
}

.input-container {
    margin-bottom: var(--spacing-sm);
}

/* 虚拟编辑器容器样式 */
.virtual-editor-container {
    width: 100%;
    min-height: 80px;
    border: none;
    background: transparent;
    box-sizing: border-box;
}

.virtual-editor-container:focus {
    outline: none;
}

/* 控制区域 */
.control-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
    margin-top: var(--spacing-sm);
}

/* 输出区域 */
.output-section {
    margin-bottom: 0;
}

.stats {
    display: flex;
    justify-content: space-around;
    margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
    padding: var(--spacing-xs);
    background: var(--color-system-background);
    border-radius: var(--radius-medium);
    border: 1px solid var(--color-separator);
}

.stats .stat-item {
    text-align: center;
    padding: 2px;
}

.stats .stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1px;
}

.stats .stat-label {
    font-size: 0.9rem;
    color: var(--color-secondary-label);
    font-weight: 400;
}




@media (max-width: 768px) {
    .stats {
        flex-direction: row;
        gap: var(--spacing-xs);
        flex-wrap: nowrap;
        overflow-x: auto;
    }
    
    .stats .stat-item {
        flex: 1;
        min-width: 0;
        text-align: center;
        padding: 2px;
    }
    
    .stats .stat-label {
        margin-bottom: 0;
        font-size: 0.8rem;
        white-space: nowrap;
    }
    
    .stats .stat-value {
        font-size: 0.9rem;
    }
    
    .control-section {
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .control-section .btn {
        flex: 1;
        min-width: 0;
        font-size: 0.85rem;
        padding: var(--spacing-xs);
    }
}

.output-container {
    margin-bottom: 8px;
}

.output-actions {
    margin-top: 8px;
    text-align: center;
}

#outputText {
    width: 100%;
    min-height: 120px;
    padding: var(--spacing-xs);
    border: 2px solid var(--color-separator);
    border-radius: var(--radius-medium);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.9rem;
    line-height: 1.4;
    background: #f5f5f5;
    color: var(--color-label);
    resize: vertical;
    box-sizing: border-box;
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    -webkit-touch-callout: none !important;
    -khtml-user-select: none !important;
}

#outputText:focus {
    border-color: var(--color-separator) !important;
    outline: none !important;
}

#outputText::selection {
    background: transparent !important;
}

#outputText::-moz-selection {
    background: transparent !important;
}

#outputText::-webkit-scrollbar {
    width: 8px;
}

#outputText::-webkit-scrollbar-track {
    background: #e0e0e0;
    border-radius: 4px;
}

#outputText::-webkit-scrollbar-thumb {
    background: #c0c0c0;
    border-radius: 4px;
}

#outputText::-webkit-scrollbar-thumb:hover {
    background: #a0a0a0;
}



/* 下载区域 */
.download-section {
    margin-top: 0;
}

.download-container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filename-input {
    display: flex;
    align-items: center;
    background: var(--color-system-background);
    border: 2px solid var(--color-separator);
    border-radius: var(--radius-medium);
    flex: 1;
    min-width: 180px;
    min-height: 36px;
    overflow: hidden;
}

.filename-input:focus-within {
    border-color: var(--color-primary);
}

#filename {
    border: none;
    padding: var(--spacing-sm);
    font-size: 0.9rem;
    flex: 1;
    outline: none;
    background: transparent;
    color: var(--color-label);
    min-width: 0;
    height: 100%;
    box-sizing: border-box;
    line-height: normal;
    display: flex;
    align-items: center;
    vertical-align: middle;
}

#filename::placeholder {
    color: var(--color-secondary-label);
}

.file-extension {
    background: var(--color-secondary-system-background);
    padding: var(--spacing-sm);
    color: var(--color-secondary-label);
    border-left: 1px solid var(--color-separator);
    font-size: 0.85rem;
    white-space: nowrap;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    min-height: 100%;
    box-sizing: border-box;
}

/* 简洁按钮样式 */
.btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--radius-medium);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 36px;
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    opacity: 0.8;
}



.btn-primary {
    background: var(--color-primary);
    color: white;
    border: 1px solid var(--color-primary);
}

.btn-secondary {
    background: var(--color-secondary);
    color: white;
    border: 1px solid var(--color-secondary);
}

.btn-success {
    background: var(--color-success);
    color: white;
    border: 1px solid var(--color-success);
}

.btn-success.btn-invalid {
    background: var(--color-danger);
    color: white;
    border: 1px solid var(--color-danger);
    cursor: not-allowed;
    opacity: 0.8;
}

.btn-success.btn-invalid:hover {
    opacity: 0.8;
}

.btn-danger {
    background: var(--color-danger);
    color: white;
    border: 1px solid var(--color-danger);
}


/* 禁用状态 */
.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* 使用浏览器默认滚动条样式 */

/* 动画效果 */




/* 加载状态 */
.processing {
    opacity: 0.6;
    pointer-events: none;
}



.processing .btn-primary {
    background: var(--color-opaque-separator);
    color: var(--color-tertiary-label);
}

.processing .btn-primary::after {
    content: ' 处理中...';
}

/* 响应式设计 */
/* 平板设备适配 */
@media (max-width: 1024px) and (min-width: 769px) {
    .container {
        margin: var(--spacing-md);
        padding: var(--spacing-lg);
        max-width: 1200px;
    }
    
    .download-container {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .filename-input {
        min-width: 200px;
        flex: 1;
    }
}

/* 平板设备适配 */
@media (max-width: 1024px) and (min-width: 769px) {
    .control-section {
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .btn-primary,
    .btn-danger {
        min-width: 140px;
        max-width: 200px;
        white-space: nowrap;
        font-size: 1rem;
    }
}

/* 移动设备适配 */
@media (max-width: 768px) {
    body {
        background: var(--color-system-background);
    }
    
    .container {
        margin: var(--spacing-sm);
        padding: var(--spacing-md);
        border-radius: var(--radius-large);
        box-shadow: none;
        border: none;
        width: calc(100% - 2 * var(--spacing-sm));
        max-width: 1200px;
    }
    
    header {
        padding: var(--spacing-md) 0;
    }
    
    .header-icon {
        margin-bottom: var(--spacing-sm);
    }
    
    header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .title-badge {
        font-size: 0.7rem;
        padding: 3px 10px;
    }
    
    .subtitle {
        font-size: 1rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .feature-tags {
        gap: var(--spacing-xs);
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 3px 8px;
        white-space: nowrap !important;
        flex-shrink: 0;
        min-width: auto;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .stats .stat-item {
        padding: var(--spacing-sm);
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
    }
    
    .stats .stat-value {
        font-size: 1.5rem;
    }
    
    .download-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filename-input {
        min-width: auto;
    }
    
    .output-actions {
        display: flex;
        justify-content: center;
    }
    
    .output-actions .btn {
        width: 100%;
        max-width: none;
        flex: 1;
    }
    
    .control-section {
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-danger,
    .btn-success {
        min-height: 44px;
        padding: var(--spacing-sm) var(--spacing-md);
        min-width: 120px;
        width: auto;
        flex: 1;
        max-width: 180px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 0.95rem;
        gap: 6px;
    }
    
    .btn svg {
        width: 16px;
        height: 16px;
    }

}

@media (max-width: 480px) {
    body {
        background: var(--color-system-background);
    }
    
    .container {
        margin: var(--spacing-xs);
        padding: var(--spacing-sm);
        box-shadow: none;
        border: none;
        width: calc(100% - 2 * var(--spacing-xs));
        max-width: 1200px;
        box-sizing: border-box;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .feature-tags {
        flex-direction: row !important;
        justify-content: center;
        align-items: center;
        flex-wrap: nowrap !important;
        gap: var(--spacing-xs);
    }
    
    .stats {
        padding: var(--spacing-sm);
    }
    
    .stats .stat-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .stat-content {
        text-align: center;
    }
    
    .output-actions {
        display: flex;
        justify-content: center;
    }
    
    .output-actions .btn {
        width: 100%;
        max-width: none;
        flex: 1;
    }
    
    .control-section {
        flex-direction: row !important;
        justify-content: center;
        gap: 8px;
        flex-wrap: nowrap !important;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-danger,
    .btn-success {
        min-height: 44px;
        padding: var(--spacing-sm) var(--spacing-sm);
        min-width: auto;
        width: auto;
        flex: 1;
        max-width: 48%;
        max-width: none;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 0.9rem;
        justify-content: center;
    }
}

/* 超小屏幕设备适配 (iPhone SE等) */
@media (max-width: 375px) {
    body {
        background: var(--color-system-background);
        font-size: 14px;
    }
    
    .container {
        margin: 8px;
        padding: 12px;
        box-shadow: none;
        border: none;
        width: calc(100% - 16px);
        max-width: 1200px;
        box-sizing: border-box;
    }
    
    header {
        padding: 16px 0;
    }
    
    header h1 {
        font-size: 1.5rem;
        margin-bottom: 8px;
    }
    
    header p {
        font-size: 0.85rem;
        margin-bottom: 0;
    }
    
    main {
        gap: 16px;
    }
    
    .output-actions {
        display: flex;
        justify-content: center;
    }
    
    .output-actions .btn {
        width: 100%;
        max-width: none;
        flex: 1;
    }
    
    .control-section {
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        flex-wrap: nowrap;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-danger {
        min-height: 44px;
        padding: 8px 12px;
        font-size: 0.9rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        min-width: auto;
        width: auto;
        flex: 1;
        max-width: 120px;
    }
    
    #inputText {
        min-height: 60px;
        font-size: 16px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 8px;
    }
    
    #outputText {
        min-height: 120px;
        font-size: 16px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 8px;
    }
    
    .filename-input {
        min-height: 44px;
        font-size: 16px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0;
    }
    
    .filename-input #filename {
        font-size: 16px;
        padding: 8px;
        flex: 1;
        min-width: 0;
    }
    
    .filename-input .file-extension {
        font-size: 14px;
        padding: 8px;
        flex-shrink: 0;
        white-space: nowrap;
    }
    
    #inputText {
        min-height: 60px;
    }
    
    #outputText {
        min-height: 100px;
    }
    
    .download-container {
        flex-direction: column;
        gap: 8px;
    }
    
    .filename-input {
        margin-bottom: 8px;
        display: flex !important;
        flex-direction: row !important;
        align-items: stretch !important;
        flex-wrap: nowrap !important;
    }
    
    .stats {
        font-size: 0.8rem;
        padding: 8px;
        margin-top: 12px;
    }
}

/* 页尾样式 */
.footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-separator);
    background: var(--color-secondary-system-background);
    width: 100%;
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-xs);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer .copyright {
    color: var(--color-secondary-label);
    font-size: 0.9rem;
    margin: 0;
}

.footer .links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-link {
    color: #007AFF;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #0056CC;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .footer .links {
        gap: var(--spacing-sm);
    }
    
    .footer-container {
        padding: 0 var(--spacing-sm);
    }
}

/* 虚拟滚动文本编辑器样式 */
.virtual-text-editor {
    width: 100%;
    position: relative;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
}

.vte-viewport {
    position: relative;
    overflow-y: auto;
    overflow-x: hidden;
    border: 2px solid var(--color-separator);
    border-radius: var(--radius-medium);
    background: var(--color-system-background);
    box-shadow: none;
    transition: border-color 0.2s ease;
    height: 80px;
    min-height: 80px;
    outline: none !important;
}

.vte-viewport:focus-within {
    border: 2px solid var(--color-primary) !important;
    box-shadow: none !important;
    outline: none !important;
}

.vte-viewport:focus {
    outline: none !important;
}

.vte-content {
    position: relative;
    width: 100%;
    min-height: 100%;
    /* 确保contenteditable样式正确 */
    padding: 2px 8px;
    border: none;
    outline: none;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    line-height: 24px;
    background: transparent;
    color: var(--color-label, #111827);
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.vte-scrollbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    pointer-events: none;
    background: transparent;
}

/* 移除.vte-line样式，不再使用textarea */

.vte-placeholder {
    color: var(--color-placeholder, #9ca3af);
    opacity: 0.7;
    font-style: italic;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 滚动条样式优化 */
.vte-viewport::-webkit-scrollbar {
    width: 8px;
}

.vte-viewport::-webkit-scrollbar-track {
    background: var(--color-tertiary-system-background);
    border-radius: 4px;
}

.vte-viewport::-webkit-scrollbar-thumb {
    background: var(--color-quaternary-label);
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.vte-viewport::-webkit-scrollbar-thumb:hover {
    background: var(--color-tertiary-label);
}

/* 行号显示（可选功能） */
.vte-line-numbers {
    position: absolute;
    left: 0;
    top: 0;
    width: 50px;
    background: var(--color-secondary-system-background);
    border-right: 1px solid var(--color-separator);
    font-size: 12px;
    color: var(--color-tertiary-label);
    text-align: right;
    padding-right: 8px;
    user-select: none;
    pointer-events: none;
}

.vte-with-line-numbers .vte-line {
    padding-left: 62px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .vte-line {
        font-size: 13px;
        padding: 2px 8px;
    }
    
    .vte-viewport {
        border-radius: var(--radius-small);
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --color-label: #FFFFFF;
        --color-secondary-label: #EBEBF599;
        --color-tertiary-label: #EBEBF54C;
        --color-quaternary-label: #EBEBF52E;
        
        --color-system-background: #000000;
        --color-secondary-system-background: #1C1C1E;
        --color-tertiary-system-background: #2C2C2E;
        --color-grouped-background: #000000;
        --color-secondary-grouped-background: #1C1C1E;
        
        --color-separator: #54545899;
        --color-opaque-separator: #38383A;
    }
    
    .vte-viewport {
        background: #1a1a1a;
        border-color: #333;
    }
    
    .vte-line {
        color: #e5e5e5;
        background: transparent;
    }
    
    .vte-line:focus {
        background: #2a2a2a;
    }
    
    .vte-line:hover:not(:focus) {
        background: rgba(99, 102, 241, 0.15);
    }
    
    .vte-viewport::-webkit-scrollbar-track {
        background: #2a2a2a;
    }
    
    .vte-viewport::-webkit-scrollbar-thumb {
        background: #555;
    }
    
    .vte-viewport::-webkit-scrollbar-thumb:hover {
        background: #777;
    }
}