/* 课程配置工具样式 - Course Configuration Tool Styles */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
  line-height: 1.6;
}

/* 导航栏 / Navigation */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #667eea;
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  background: #667eea;
  color: white;
}

/* 主容器 / Main Container */
.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
}

.content-card {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

/* 页面标题 / Page Title */
.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 2rem;
}

/* 表单样式 / Form Styles */
.form-section {
  margin-bottom: 2rem;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #333;
  border-bottom: 2px solid #f0f0f0;
  padding-bottom: 0.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
}

.form-input,
.form-select,
.form-textarea {
  padding: 0.75rem;
  border: 2px solid #e1e5e9;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

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

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: #667eea;
}

/* 按钮样式 / Button Styles */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #f8f9fa;
  color: #333;
  border: 2px solid #e1e5e9;
}

.btn-secondary:hover {
  background: #e9ecef;
  border-color: #adb5bd;
}

.btn-success {
  background: linear-gradient(135deg, #28a745, #20c997);
  color: white;
  box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.btn-danger {
  background: linear-gradient(135deg, #dc3545, #e83e8c);
  color: white;
  box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 53, 69, 0.4);
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* 表格样式 / Table Styles */
.table-container {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  margin: 2rem 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #e1e5e9;
}

.data-table th {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  font-weight: 600;
  position: sticky;
  top: 0;
}

.data-table tbody tr:hover {
  background: #f8f9fa;
}

.data-table .actions {
  display: flex;
  gap: 0.5rem;
}

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

/* 卡片样式 / Card Styles */
.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
  border-left: 4px solid #667eea;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
}

.card-content {
  color: #666;
  line-height: 1.6;
}

/* 预览样式 / Preview Styles */
.preview-container {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
}

.preview-section {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid #e1e5e9;
}

.preview-section:last-child {
  border-bottom: none;
}

.preview-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #667eea;
}

.preview-item {
  margin-bottom: 1rem;
  padding: 1rem;
  background: white;
  border-radius: 8px;
  border-left: 3px solid #28a745;
}

.preview-item h4 {
  color: #333;
  margin-bottom: 0.5rem;
}

.preview-item p {
  color: #666;
  margin-bottom: 0.5rem;
}

.preview-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.tag {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* 代码块样式 / Code Block Styles */
.code-block {
  background: #2d3748;
  color: #e2e8f0;
  padding: 1.5rem;
  border-radius: 8px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid #4a5568;
}

.code-block pre {
  margin: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* 响应式设计 / Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    gap: 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  .content-card {
    padding: 1.5rem;
  }

  .page-title {
    font-size: 2rem;
  }

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

  .btn-group {
    flex-direction: column;
  }

  .data-table {
    font-size: 0.9rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem 0.5rem;
  }
}

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

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

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

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

.mb-2 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 2rem;
}

.hidden {
  display: none;
}

.flex {
  display: flex;
}

.justify-between {
  justify-content: space-between;
}

.align-center {
  align-items: center;
}

.gap-2 {
  gap: 1rem;
}

/* 状态提示 / Status Indicators */
.alert {
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-info {
  background: #cce7ff;
  color: #004085;
  border: 1px solid #b3d7ff;
}

/* Markdown 预览代码块样式 / Markdown Preview Code Block Styles */
.markdown-preview pre {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  overflow-x: auto;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9rem;
  line-height: 1.4;
}

.markdown-preview code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9rem;
}

.markdown-preview pre code {
  background: none;
  border: none;
  padding: 0;
  color: #333;
  display: block;
  white-space: pre;
}

.markdown-preview code:not(pre code) {
  background: #f1f3f4;
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: #d73a49;
  font-weight: 500;
}

/* 语法高亮样式 / Syntax Highlighting Styles */
.markdown-preview pre code.language-javascript,
.markdown-preview pre code.language-js {
  color: #333;
}

.markdown-preview pre code.language-html {
  color: #333;
}

.markdown-preview pre code.language-css {
  color: #333;
}

.markdown-preview pre code.language-json {
  color: #333;
}

/* 代码块滚动条样式 / Code Block Scrollbar Styles */
.markdown-preview pre::-webkit-scrollbar {
  height: 8px;
}

.markdown-preview pre::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

.markdown-preview pre::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 4px;
}

.markdown-preview pre::-webkit-scrollbar-thumb:hover {
  background: #a8a8a8;
}