/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #1e293b;
    background-color: #f8fafc;
}

/* 玻璃态导航栏 */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.dark .glass {
    background: rgba(15, 23, 42, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* 输入字段样式 */
.input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

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

.dark .input-field {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.dark .input-field:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* 表单输入样式（form-input 与 input-field 统一） */
.form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

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

.dark .form-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.dark .form-input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* textarea 使用 form-input 类时的兜底样式（确保等宽字体和可调整尺寸） */
textarea.form-input {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    line-height: 1.6;
    resize: vertical;
    min-height: 6rem;
    tab-size: 4;
}

/* 屏幕阅读器专用（视觉隐藏但可被辅助设备读取） */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 文本区域样式 */
.textarea-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    line-height: 1.6;
    resize: vertical;
    min-height: 10rem;
    transition: all 0.2s ease;
    tab-size: 4;
}

.textarea-field:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.dark .textarea-field {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.dark .textarea-field:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

@media (min-width: 1024px) {
    .textarea-field {
        /* 大屏上适当增加文本框高度，充分利用空间 */
        min-height: 18rem;
    }
}

/* 按钮样式 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    background-color: #3b82f6;
    color: #ffffff;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-primary:active {
    transform: translateY(0);
}

.dark .btn-primary:hover {
    background-color: #2563eb;
}

/* 按钮禁用状态 */
.btn-primary:disabled,
.btn-outline:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary:disabled:hover {
    background-color: #3b82f6;
    transform: none;
    box-shadow: none;
}

/* 键盘焦点样式（无障碍） */
*:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

button:focus:not(:focus-visible) {
    outline: none;
}

/* 次要按钮样式 */
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    background-color: transparent;
    color: #3b82f6;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid #3b82f6;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-outline:hover {
    background-color: #3b82f6;
    color: #ffffff;
}

.dark .btn-outline {
    color: #3b82f6;
    border-color: #3b82f6;
}

.dark .btn-outline:hover {
    background-color: #3b82f6;
    color: #ffffff;
}

/* 工具卡片样式 */
.tool-card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.25s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    border-color: #3b82f6;
}

.tool-card:active {
    transform: translateY(0);
}

.dark .tool-card {
    background-color: #1e293b;
    border-color: #374151;
}

.dark .tool-card:hover {
    border-color: #3b82f6;
}

/* 分类按钮样式 */
.category-btn {
    padding: 0.5rem 1rem;
    background-color: #f1f5f9;
    color: #64748b;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.category-btn:hover {
    background-color: #e2e8f0;
    color: #334155;
}

.category-btn.active {
    background-color: #3b82f6;
    color: #ffffff;
}

.dark .category-btn {
    background-color: #374151;
    color: #9ca3af;
}

.dark .category-btn:hover {
    background-color: #4b5563;
    color: #d1d5db;
}

.dark .category-btn.active {
    background-color: #3b82f6;
    color: #ffffff;
}

/* 加载动画 */
.loading-spinner {
    width: 2rem;
    height: 2rem;
    border: 2px solid #e2e8f0;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 工具页面通用样式 */
#tool-content {
    max-width: 1600px;
    margin: 0 auto;
}

.tool-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tool-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tool-row {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 768px) {
    .tool-row {
        flex-direction: row;
    }
}

.tool-col {
    flex: 1;
}

/* 输入输出区域样式 */
.input-output-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

@media (min-width: 1024px) {
    .input-output-container {
        flex-direction: row;
        /* 让输入输出区域在大屏上尽量占满可用高度，减少空白 */
        min-height: 55vh;
    }
}

.input-section, .output-section {
    flex: 1 1 0;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* 让 textarea 在其父区域内自动伸展填满 */
.input-section .textarea-field,
.output-section .textarea-field {
    flex: 1 1 auto;
    min-height: 12rem;
}

@media (min-width: 1024px) {
    .input-section .textarea-field,
    .output-section .textarea-field {
        min-height: 18rem;
    }
}

.input-label, .output-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: #374151;
}

.dark .input-label, .dark .output-label {
    color: #d1d5db;
}

/* 按钮组样式 */
.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.button-group .btn-primary,
.button-group .btn-outline {
    padding: 0.5rem 1.25rem;
    font-size: 0.8125rem;
}

/* 表单标签样式 */
.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: #374151;
    margin-bottom: 0.375rem;
}

.dark .form-label {
    color: #d1d5db;
}

/* 表单选择样式 */
.form-select {
    width: 100%;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    color: #1e293b;
    font-size: 0.875rem;
    appearance: none;
    -webkit-appearance: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.dark .form-select {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.dark .form-select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* 工具选项样式 */
.tool-options {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.tool-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.tool-option input[type="radio"],
.tool-option input[type="checkbox"] {
    accent-color: #3b82f6;
}

/* 工具特定样式 */

/* JSON格式化工具 */
.json-editor {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.json-error {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.json-stats {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.5rem;
}

.dark .json-stats {
    color: #9ca3af;
}

/* 时间戳转换工具 */
.timestamp-display {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.dark .timestamp-display {
    background-color: #374151;
}

.timezone-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
}

.dark .timezone-select {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* 加密解密工具 */
.encryption-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.encryption-algorithm {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
}

.dark .encryption-algorithm {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* 图片工具 */
.image-preview {
    max-width: 100%;
    height: auto;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    padding: 0.5rem;
    background-color: #ffffff;
}

.dark .image-preview {
    border-color: #374151;
    background-color: #1e293b;
}

.image-info {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.5rem;
}

.dark .image-info {
    color: #9ca3af;
}

.image-upload-area {
    display: block;
    border: 2px dashed #d1d5db;
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: #fafafa;
}

.image-upload-area:hover {
    border-color: #3b82f6;
    background-color: #eff6ff;
}

.dark .image-upload-area {
    background-color: rgba(30, 41, 59, 0.5);
}

.dark .image-upload-area:hover {
    border-color: #3b82f6;
    background-color: rgba(59, 130, 246, 0.05);
}

.image-upload-text {
    color: #64748b;
}

.dark .image-upload-text {
    color: #9ca3af;
}

.image-upload-icon {
    font-size: 2rem;
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.dark .image-upload-icon {
    color: #6b7280;
}

/* QR码工具 */
.qrcode-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
}

.dark .qrcode-container {
    background-color: #1e293b;
    border-color: #374151;
}

.qrcode-download {
    margin-top: 0.75rem;
}

/* OCR工具 */
.ocr-result {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 10rem;
}

.dark .ocr-result {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* 进制转换工具 */
.base-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.base-label {
    font-weight: 500;
    color: #374151;
}

.dark .base-label {
    color: #d1d5db;
}

.base-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.dark .base-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* UUID生成器 */
.uuid-display {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
}

.dark .uuid-display {
    background-color: #374151;
}

.uuid-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* SHA加密工具 */
.sha-algorithm {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
}

.dark .sha-algorithm {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.sha-result {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.dark .sha-result {
    background-color: #374151;
}

/* Unicode转换工具 */
.unicode-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 8rem;
}

.dark .unicode-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.unicode-output {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.dark .unicode-output {
    background-color: #374151;
}

/* HTML转义工具 */
.html-input, .html-output {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    min-height: 8rem;
}

.dark .html-input, .dark .html-output {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* 文本去重工具 */
.deduplication-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.deduplication-result {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 8rem;
}

.dark .deduplication-result {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.deduplication-stats {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.5rem;
}

.dark .deduplication-stats {
    color: #9ca3af;
}

/* 大小写转换工具 */
.case-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.case-result {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 8rem;
}

.dark .case-result {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

/* 密码生成器 */
.password-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.password-length {
    width: 6rem;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
}

.dark .password-length {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.password-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.password-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.password-checkbox input[type="checkbox"] {
    accent-color: #3b82f6;
}

.password-display {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.dark .password-display {
    background-color: #374151;
}

.password-strength {
    margin-top: 0.5rem;
}

.strength-weak {
    color: #ef4444;
}

.strength-medium {
    color: #f59e0b;
}

.strength-strong {
    color: #10b981;
}

/* 文本计数器工具 */
.counter-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 8rem;
}

.dark .counter-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.counter-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

@media (min-width: 768px) {
    .counter-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.counter-stat-item {
    background-color: #f1f5f9;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
}

.dark .counter-stat-item {
    background-color: #374151;
}

.counter-stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #3b82f6;
}

.counter-stat-label {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.25rem;
}

.dark .counter-stat-label {
    color: #9ca3af;
}

/* 时间计算器工具 */
.time-calculator-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.time-input-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .time-input-group {
        grid-template-columns: repeat(4, 1fr);
    }
}

.time-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
}

.dark .time-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.calculation-result {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

.dark .calculation-result {
    background-color: #374151;
}

/* 时区转换工具 */
.timezone-converter {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.source-time, .target-time {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.dark .source-time, .dark .target-time {
    background-color: #374151;
}

/* 文本比较工具 */
.text-comparison {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 1024px) {
    .text-comparison {
        flex-direction: row;
    }
}

.text-input-left, .text-input-right {
    flex: 1;
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    min-height: 16rem;
}

.dark .text-input-left, .dark .text-input-right {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.diff-result {
    margin-top: 1rem;
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    min-height: 16rem;
}

.dark .diff-result {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.diff-stats {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 0.5rem;
}

.dark .diff-stats {
    color: #9ca3af;
}

/* 正则测试工具 */
.regex-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.dark .regex-input {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.test-string {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    color: #1e293b;
    font-size: 0.875rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    min-height: 8rem;
}

.dark .test-string {
    background-color: #1e293b;
    border-color: #374151;
    color: #f1f5f9;
}

.regex-flags {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.flag-checkbox {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.flag-checkbox input[type="checkbox"] {
    accent-color: #3b82f6;
}

.regex-result {
    margin-top: 1rem;
}

.match-item {
    background-color: #f1f5f9;
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.dark .match-item {
    background-color: #374151;
}

.match-highlight {
    background-color: #fef3c7;
}

.dark .match-highlight {
    background-color: #92400e;
}

/* 颜色选择器工具 */
.color-picker {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.color-preview {
    width: 100%;
    height: 8rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background-color: #ffffff;
    position: relative;
}

.dark .color-preview {
    border-color: #374151;
}

.color-inputs {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .color-inputs {
        grid-template-columns: repeat(2, 1fr);
    }
}

.color-format {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.color-format-label {
    font-size: 0.75rem;
    color: #64748b;
}

.dark .color-format-label {
    color: #9ca3af;
}

.color-format-value {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    background-color: #f1f5f9;
    padding: 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
}

.dark .color-format-value {
    background-color: #374151;
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.palette-color {
    width: 2rem;
    height: 2rem;
    border-radius: 0.25rem;
    cursor: pointer;
    border: 1px solid #e2e8f0;
    transition: transform 0.2s ease;
}

.palette-color:hover {
    transform: scale(1.1);
}

.dark .palette-color {
    border-color: #374151;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    
    .tool-card {
        padding: 1rem;
    }
    
    .input-output-container {
        gap: 1rem;
    }
    
    .button-group {
        justify-content: stretch;
    }
    
    .button-group > button {
        flex: 1;
        min-width: 0;
        font-size: 0.8125rem;
        padding: 0.625rem 0.75rem;
    }
    
    #tool-content {
        padding: 1rem;
    }
    
    .textarea-field {
        min-height: 8rem;
        font-size: 0.8125rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

.animate-fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

.animate-slide-in {
    animation: slideIn 0.3s ease-in-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 0.5rem;
    height: 0.5rem;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.dark ::-webkit-scrollbar-track {
    background: #1e293b;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 0.25rem;
}

.dark ::-webkit-scrollbar-thumb {
    background: #475569;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.dark ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* 文本选中颜色 */
::selection {
    background-color: rgba(59, 130, 246, 0.2);
    color: inherit;
}

/* Markdown 预览区样式 */
.markdown-preview {
    font-size: 0.9375rem;
    line-height: 1.7;
}

.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
    color: #1e293b;
}

.dark .markdown-preview h1,
.dark .markdown-preview h2,
.dark .markdown-preview h3,
.dark .markdown-preview h4,
.dark .markdown-preview h5,
.dark .markdown-preview h6 {
    color: #f1f5f9;
}

.markdown-preview h1 { font-size: 1.75rem; border-bottom: 1px solid #e2e8f0; padding-bottom: 0.5rem; }
.markdown-preview h2 { font-size: 1.5rem; border-bottom: 1px solid #e2e8f0; padding-bottom: 0.4rem; }
.markdown-preview h3 { font-size: 1.25rem; }
.markdown-preview h4 { font-size: 1.125rem; }
.markdown-preview h5 { font-size: 1rem; }
.markdown-preview h6 { font-size: 0.875rem; color: #64748b; }

.dark .markdown-preview h1,
.dark .markdown-preview h2 {
    border-bottom-color: #334155;
}

.dark .markdown-preview h6 {
    color: #94a3b8;
}

.markdown-preview p {
    margin-bottom: 0.75rem;
}

.markdown-preview ul,
.markdown-preview ol {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
}

.markdown-preview li {
    margin-bottom: 0.25rem;
}

.markdown-preview code {
    background-color: #f1f5f9;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 0.875em;
    color: #ef4444;
}

.dark .markdown-preview code {
    background-color: #1e293b;
    color: #f87171;
}

.markdown-preview pre {
    background-color: #1e293b;
    color: #f1f5f9;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 0.75rem;
}

.markdown-preview pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    font-size: 0.875rem;
}

.markdown-preview blockquote {
    border-left: 4px solid #3b82f6;
    padding-left: 1rem;
    margin-bottom: 0.75rem;
    color: #475569;
}

.dark .markdown-preview blockquote {
    color: #94a3b8;
}

.markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0.75rem;
}

.markdown-preview th,
.markdown-preview td {
    border: 1px solid #e2e8f0;
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.dark .markdown-preview th,
.dark .markdown-preview td {
    border-color: #334155;
}

.markdown-preview th {
    background-color: #f8fafc;
    font-weight: 600;
}

.dark .markdown-preview th {
    background-color: #1e293b;
}

.markdown-preview tr:nth-child(even) {
    background-color: #f8fafc;
}

.dark .markdown-preview tr:nth-child(even) {
    background-color: #0f172a;
}

.markdown-preview hr {
    border: none;
    border-top: 1px solid #e2e8f0;
    margin: 1.5rem 0;
}

.dark .markdown-preview hr {
    border-top-color: #334155;
}

.markdown-preview a {
    color: #3b82f6;
    text-decoration: underline;
}

.markdown-preview a:hover {
    color: #2563eb;
}

.markdown-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 0.375rem;
}

/* 打印友好样式 */
@media print {
    header, footer, nav, .button-group, #search-input, #history-btn, #theme-toggle, #support-btn {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .tool-card, #tool-content {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}