/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 基础样式 */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部样式 */
.header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo {
  width: 32px;
  height: 32px;
}

.nav-brand h1 {
  font-size: 1.5rem;
  color: #2c3e50;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: #666;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #3498db;
}

.nav-lang {
  display: flex;
  gap: 1rem;
}

.nav-lang a {
  text-decoration: none;
  color: #666;
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: all 0.3s;
}

.nav-lang a:hover,
.nav-lang a.active {
  background: #3498db;
  color: white;
}

/* 主要内容区域 */
.main {
  min-height: calc(100vh - 120px);
}

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
  padding: 4rem 2rem;
}

.hero h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 1rem;
}

.btn-primary {
  background: #3498db;
  color: white;
}

.btn-primary:hover {
  background: #2980b9;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: #3498db;
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: white;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

/* 功能卡片 */
.features {
  padding: 4rem 2rem;
  background: white;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.feature-card p {
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* 学习区域样式 */
.learning-section {
  padding: 4rem 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.learning-section h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: white;
}

.learning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.learning-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  transition: all 0.3s ease;
}

.learning-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
}

.learning-card h4 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: white;
}

.learning-card p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* 页面头部 */
.page-header {
  background: white;
  padding: 3rem 2rem;
  text-align: center;
  border-bottom: 1px solid #eee;
}

.page-header h2 {
  font-size: 2.5rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.page-header p {
  font-size: 1.1rem;
  color: #666;
}

/* 生成器样式 */
.creator-section {
  padding: 2rem;
  background: white;
}

.creator-container {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.creator-sidebar {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 12px;
  height: fit-content;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #e1e8ed;
}

.creator-sidebar h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.3rem;
  font-weight: 600;
}

.type-selector {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.type-btn {
  padding: 1rem;
  border: 2px solid #e1e8ed;
  background: white;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
  font-weight: 500;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.type-btn:hover {
  background: #f8f9fa;
  border-color: #3498db;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.15);
}

.type-btn.active {
  background: #3498db;
  color: white;
  border-color: #3498db;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.config-panel h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.2rem;
  font-weight: 600;
}

/* 配置选项样式 */
.config-option {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: white;
  border-radius: 8px;
  border: 1px solid #e1e8ed;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.config-option label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: #2c3e50;
  font-size: 0.95rem;
}

.config-option input[type="checkbox"] {
  margin-right: 0.5rem;
  transform: scale(1.2);
}

.config-option select {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e1e8ed;
  border-radius: 6px;
  background: white;
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.config-option select:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.config-option input[type="number"] {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e1e8ed;
  border-radius: 6px;
  background: white;
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.config-option input[type="number"]:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Custom Pattern 专用样式 */
.config-option textarea {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  background: white;
  font-family: "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.3s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.config-option textarea:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* 自定义模式验证状态 */
.config-option textarea.pattern-valid {
  border-color: #27ae60;
  background: #f8fff8;
}

.config-option textarea.pattern-valid:focus {
  border-color: #27ae60;
  box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.1);
}

.config-option textarea.pattern-invalid {
  border-color: #e74c3c;
  background: #fff8f8;
}

.config-option textarea.pattern-invalid:focus {
  border-color: #e74c3c;
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.option-description {
  display: block;
  margin-top: 0.5rem;
  color: #666;
  font-size: 0.85rem;
  font-style: italic;
}

.creator-main {
  background: white;
  border: 1px solid #e1e8ed;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.result-panel h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.3rem;
  font-weight: 600;
}

.regex-output {
  margin-bottom: 2.5rem;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid #e1e8ed;
}

.regex-output textarea {
  width: 100%;
  min-height: 120px;
  padding: 1.25rem;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
  background: white;
  transition: border-color 0.3s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.regex-output textarea:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.regex-output .btn {
  margin-top: 1rem;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s;
}

.test-section {
  border-top: 2px solid #e1e8ed;
  padding-top: 2rem;
  background: #f8f9fa;
  margin: 0 -2rem -2rem -2rem;
  padding: 2rem;
  border-radius: 0 0 12px 12px;
}

.test-section h4 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.2rem;
  font-weight: 600;
}

.test-section textarea {
  width: 100%;
  min-height: 150px;
  padding: 1.25rem;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  margin-bottom: 1.5rem;
  background: white;
  transition: border-color 0.3s, box-shadow 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.test-section textarea:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* 测试结果显示区域 */
#match-results {
  background: white;
  border: 1px solid #e1e8ed;
  border-radius: 8px;
  padding: 1.5rem;
  min-height: 100px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.match-results h4 {
  color: #2c3e50;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.match-item {
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: #e8f4fd;
  border-radius: 6px;
  border-left: 4px solid #3498db;
  transition: all 0.3s;
}

.match-item:hover {
  background: #d1ecf1;
  transform: translateX(2px);
}

.match-index {
  font-weight: 600;
  color: #2c3e50;
  margin-right: 0.5rem;
}

.match-text {
  font-family: "Courier New", monospace;
  color: #e74c3c;
  background: #f8f9fa;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin: 0 0.5rem;
}

.match-position {
  color: #666;
  font-size: 0.9rem;
  margin-left: 0.5rem;
}

.no-matches {
  text-align: center;
  color: #666;
  font-style: italic;
  padding: 2rem;
  background: #f8f9fa;
  border-radius: 6px;
  border: 1px dashed #ddd;
}

/* 测试器样式 */
.tester-section {
  padding: 2rem;
  background: white;
}

.tester-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tester-panel {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 8px;
}

.input-group {
  margin-bottom: 1.5rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #2c3e50;
}

.input-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-family: "Courier New", monospace;
  resize: vertical;
}

.options-group {
  margin-bottom: 1.5rem;
}

.options-group h4 {
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.option-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

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

.result-panel {
  background: white;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 1.5rem;
}

.result-panel h3 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

.match-info {
  display: flex;
  gap: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #eee;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.info-item .label {
  font-size: 0.9rem;
  color: #666;
}

.info-item span:last-child {
  font-weight: 600;
  color: #2c3e50;
}

/* 示例样式 */
.examples-section {
  padding: 2rem;
  background: white;
}

.search-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  max-width: 600px;
}

.search-bar input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
}

.category-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.5rem 1rem;
  border: 1px solid #ddd;
  background: white;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s;
}

.tab-btn:hover,
.tab-btn.active {
  background: #3498db;
  color: white;
  border-color: #3498db;
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.5rem;
}

.example-card {
  background: white;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 1.5rem;
  transition: all 0.3s;
}

.example-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

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

.card-header h3 {
  color: #2c3e50;
  font-size: 1.2rem;
}

.category-tag {
  background: #3498db;
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

.regex-pattern {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 6px;
}

.regex-pattern code {
  flex: 1;
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
  color: #e74c3c;
  word-break: break-all;
}

.copy-btn {
  padding: 0.5rem 1rem;
  background: #27ae60;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.3s;
}

.copy-btn:hover {
  background: #229954;
}

.description {
  margin-bottom: 1rem;
  color: #666;
}

.test-examples {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.test-examples strong {
  color: #2c3e50;
}

.valid {
  color: #27ae60;
}

.invalid {
  color: #e74c3c;
}

/* 教程样式 */
.tutorial-section {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2rem;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tutorial-sidebar {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 8px;
  height: fit-content;
  position: sticky;
  top: 100px;
}

.tutorial-sidebar h3 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

.tutorial-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.75rem;
  text-decoration: none;
  color: #666;
  border-radius: 6px;
  transition: all 0.3s;
}

.nav-link:hover,
.nav-link.active {
  background: #3498db;
  color: white;
}

.tutorial-content {
  background: white;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tutorial-chapter {
  display: none;
}

.tutorial-chapter.active {
  display: block;
}

.tutorial-chapter h3 {
  color: #2c3e50;
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

.tutorial-chapter h4 {
  color: #2c3e50;
  margin: 1.5rem 0 0.5rem 0;
  font-size: 1.3rem;
}

.tutorial-chapter h5 {
  color: #2c3e50;
  margin: 1rem 0 0.5rem 0;
  font-size: 1.1rem;
}

.tutorial-chapter p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.tutorial-chapter ul {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.tutorial-chapter li {
  margin-bottom: 0.5rem;
}

.example-box {
  background: #f8f9fa;
  border: 1px solid #eee;
  border-radius: 6px;
  padding: 1rem;
  margin: 1rem 0;
}

.code-block {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 0.75rem;
  border-radius: 4px;
  margin: 0.5rem 0;
  font-family: "Courier New", monospace;
  overflow-x: auto;
}

.code-block code {
  color: #ecf0f1;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

table th,
table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}

table th {
  background: #f8f9fa;
  font-weight: 600;
  color: #2c3e50;
}

.practice-exercises {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.exercise {
  background: #f8f9fa;
  border: 1px solid #eee;
  border-radius: 6px;
  padding: 1.5rem;
}

.exercise h5 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.solution {
  margin-top: 1rem;
  padding: 1rem;
  background: #e8f5e8;
  border-radius: 4px;
  border-left: 4px solid #27ae60;
}

.solution strong {
  color: #27ae60;
}

.solution code {
  color: #e74c3c;
  font-family: "Courier New", monospace;
}

/* 广告位和联盟推广区 */
.ad-slot,
.affiliate-section {
  background: #f8f9fa;
  border: 2px dashed #ddd;
  border-radius: 8px;
  padding: 2rem;
  margin: 2rem 0;
  text-align: center;
  color: #666;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-slot::before {
  content: "广告位";
}

.affiliate-section::before {
  content: "联盟推广区";
}

/* 页脚样式 */
.footer {
  background: #2c3e50;
  color: white;
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-lang {
    justify-content: center;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .creator-container,
  .tester-container,
  .checker-container,
  .test-container,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .creator-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .creator-sidebar {
    order: 2;
  }

  .creator-main {
    order: 1;
  }

  .config-option textarea {
    min-height: 150px;
  }

  .checker-input textarea {
    min-height: 150px;
  }

  .input-controls {
    flex-direction: column;
  }

  .tutorial-section {
    grid-template-columns: 1fr;
  }

  .tutorial-sidebar {
    position: static;
  }

  .examples-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem;
  }

  .hero h2 {
    font-size: 1.5rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .learning-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .learning-section {
    padding: 3rem 1rem;
  }

  .learning-section h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .search-bar {
    flex-direction: column;
  }

  .category-tabs {
    justify-content: center;
  }

  .regex-pattern {
    flex-direction: column;
    align-items: stretch;
  }

  .copy-btn {
    margin-top: 0.5rem;
  }
}

/* 工具类 */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mb-1 {
  margin-bottom: 0.5rem;
}
.mb-2 {
  margin-bottom: 1rem;
}
.mb-3 {
  margin-bottom: 1.5rem;
}
.mb-4 {
  margin-bottom: 2rem;
}

.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mt-3 {
  margin-top: 1.5rem;
}
.mt-4 {
  margin-top: 2rem;
}

.p-1 {
  padding: 0.5rem;
}
.p-2 {
  padding: 1rem;
}
.p-3 {
  padding: 1.5rem;
}
.p-4 {
  padding: 2rem;
}

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* 加载状态 */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* =========================== */
/* Online 工具总览页面样式    */
/* =========================== */
.tools-grid {
  padding: 2rem;
  background: white;
}

.tools-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: #ffffff;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.tool-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.tool-card h3 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.tool-card p {
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* =========================== */
/* Builder 可视化构建器样式   */
/* =========================== */
.builder-section {
  padding: 2rem;
  background: white;
}

.builder-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 2rem;
}

.builder-sidebar {
  background: #f8f9fa;
  border: 1px solid #e1e8ed;
  border-radius: 12px;
  padding: 1.5rem;
  height: fit-content;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.builder-sidebar h3 {
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.component-palette {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.component-group h4 {
  color: #2c3e50;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.component-btn,
.preset-btn {
  display: inline-block;
  margin: 0.25rem 0.5rem 0.25rem 0;
  padding: 0.75rem 1rem;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  background: #ffffff;
  color: #2c3e50;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.component-btn:hover,
.preset-btn:hover {
  background: #3498db;
  color: #fff;
  border-color: #3498db;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.component-btn.dragging {
  opacity: 0.5;
  transform: rotate(5deg);
}

.preset-patterns {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e1e8ed;
}

.builder-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.builder-canvas {
  background: #ffffff;
  border: 1px solid #e1e8ed;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.builder-canvas h3 {
  color: #2c3e50;
  margin-bottom: 1rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.canvas-area {
  min-height: 200px;
  padding: 1.5rem;
  border: 2px dashed #e1e8ed;
  border-radius: 10px;
  background: #f9fbfd;
  transition: all 0.3s;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: flex-start;
  align-content: flex-start;
}

.canvas-area.drag-over {
  border-color: #3498db;
  background: #e8f4fd;
  border-style: solid;
}

.canvas-placeholder {
  color: #8a99a6;
  text-align: center;
  font-size: 1rem;
  font-style: italic;
  width: 100%;
  padding: 2rem;
}

/* 正则表达式组件样式 */
.regex-component {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #3498db;
  color: white;
  border-radius: 8px;
  cursor: move;
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
  font-size: 0.9rem;
  font-weight: 500;
  user-select: none;
}

.regex-component:hover {
  background: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.regex-component.dragging {
  opacity: 0.5;
  transform: rotate(5deg);
}

.regex-component.drag-over {
  background: #e74c3c;
  transform: scale(1.05);
}

.component-pattern {
  font-family: "Courier New", monospace;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.component-description {
  font-size: 0.8rem;
  opacity: 0.9;
}

.remove-component {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: bold;
  transition: all 0.3s;
}

.remove-component:hover {
  background: #e74c3c;
  transform: scale(1.1);
}

.builder-controls {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.builder-controls .btn {
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s;
}

.builder-controls .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  background: #bdc3c7;
}

.builder-controls .btn:disabled:hover {
  background: #bdc3c7;
  transform: none;
}

/* 生成结果与测试 */
.regex-output textarea {
  width: 100%;
  min-height: 90px;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 0.95rem;
  resize: vertical;
}

.regex-output .btn {
  margin-top: 0.75rem;
}

#match-results {
  margin-top: 1rem;
  background: #f8f9fa;
  border: 1px solid #eee;
  border-radius: 8px;
  min-height: 80px;
  padding: 0.75rem;
}

/* =========================== */
/* 响应式 - Builder/Online    */
/* =========================== */
@media (max-width: 1024px) {
  .builder-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .builder-sidebar {
    order: 2;
  }

  .builder-main {
    order: 1;
  }

  .canvas-area {
    min-height: 150px;
  }

  .regex-component {
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
  }
}

@media (max-width: 768px) {
  .builder-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .builder-sidebar {
    padding: 1rem;
  }

  .builder-canvas {
    padding: 1rem;
  }

  .canvas-area {
    min-height: 120px;
    padding: 1rem;
  }

  .component-btn,
  .preset-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
  }

  .regex-component {
    font-size: 0.8rem;
    padding: 0.4rem 0.6rem;
  }

  .builder-controls {
    flex-direction: column;
  }

  .builder-controls .btn {
    width: 100%;
  }
}

/* Checker专用样式 */
.checker-section {
  padding: 2rem;
  background: white;
}

.checker-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.checker-input {
  background: #f8f9fa;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.checker-input h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.3rem;
}

.checker-input textarea {
  width: 100%;
  min-height: 200px;
  padding: 1.5rem;
  border: 2px solid #e1e8ed;
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.3s, box-shadow 0.3s;
  background: white;
}

.checker-input textarea:focus {
  outline: none;
  border-color: #3498db;
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.input-controls {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.input-controls .btn {
  flex: 1;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s;
}

.checker-results {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.checker-results h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.3rem;
}

.status-panel {
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  border: 2px solid #e1e8ed;
  background: #f8f9fa;
  transition: all 0.3s;
}

.status-panel.success {
  background: #d5f4e6;
  border-color: #27ae60;
}

.status-panel.error {
  background: #fadbd8;
  border-color: #e74c3c;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-icon {
  font-size: 1.5rem;
  font-weight: bold;
}

.status-text {
  font-size: 1.1rem;
  font-weight: 500;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.result-card {
  background: #f8f9fa;
  border: 1px solid #e1e8ed;
  border-radius: 8px;
  padding: 1.5rem;
  transition: all 0.3s;
}

.result-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.result-card h4 {
  margin-bottom: 1rem;
  color: #2c3e50;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-content {
  min-height: 60px;
}

.result-text {
  font-size: 0.95rem;
  line-height: 1.5;
}

.result-text.success {
  color: #27ae60;
  font-weight: 600;
}

.result-text.error {
  color: #e74c3c;
  font-weight: 600;
}

.result-text.warning {
  color: #f39c12;
  font-weight: 600;
}

.test-section {
  margin-top: 3rem;
  padding: 2rem;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.test-section h3 {
  margin-bottom: 2rem;
  color: #2c3e50;
  font-size: 1.5rem;
  text-align: center;
}

.test-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.test-input,
.test-results {
  background: #f8f9fa;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #e1e8ed;
}

.test-input h4,
.test-results h4 {
  margin-bottom: 1rem;
  color: #2c3e50;
  font-size: 1.1rem;
}

.test-input textarea {
  width: 100%;
  min-height: 150px;
  padding: 1rem;
  border: 2px solid #e1e8ed;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  resize: vertical;
  transition: border-color 0.3s;
}

.test-input textarea:focus {
  outline: none;
  border-color: #3498db;
}

.match-output {
  min-height: 150px;
  max-height: 300px;
  overflow-y: auto;
  padding: 1rem;
  background: white;
  border-radius: 6px;
  border: 1px solid #e1e8ed;
}

.match-item {
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: #e8f4fd;
  border-radius: 4px;
  border-left: 4px solid #3498db;
}

.match-index {
  font-weight: 600;
  color: #2c3e50;
}

.match-text {
  font-family: "Courier New", monospace;
  color: #e74c3c;
  margin: 0 0.5rem;
}

.match-position {
  color: #666;
  font-size: 0.9rem;
}

.no-results {
  text-align: center;
  color: #666;
  font-style: italic;
  padding: 2rem;
}

/* 成功/错误状态 */
.success {
  color: #27ae60;
  background: #d5f4e6;
  border: 1px solid #27ae60;
  padding: 0.5rem;
  border-radius: 4px;
}

.error {
  color: #e74c3c;
  background: #fadbd8;
  border: 1px solid #e74c3c;
  padding: 0.5rem;
  border-radius: 4px;
}

.warning {
  color: #f39c12;
  background: #fef9e7;
  border: 1px solid #f39c12;
  padding: 0.5rem;
  border-radius: 4px;
}