client/src/App.css

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

body {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
  line-height: 1.6;
}

.App {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Header Styles */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #333;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav a {
  text-decoration: none;
  color: #666;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.nav a:hover,
.nav a.active {
  color: #667eea;
  background: rgba(102, 126, 234, 0.1);
}

/* Card Styles */
.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.example-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.example-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.example-header {
  display: flex;
  justify-content: between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.example-brand {
  font-size: 0.9rem;
  color: #667eea;
  font-weight: 600;
  background: rgba(102, 126, 234, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.example-category {
  font-size: 0.8rem;
  color: #888;
  background: rgba(136, 136, 136, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  margin-left: auto;
}

.language-section {
  margin: 1rem 0;
}

.language-label {
  font-size: 0.9rem;
  color: #666;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.language-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: #333;
  padding: 0.75rem;
  background: rgba(102, 126, 234, 0.05);
  border-radius: 8px;
  border-left: 3px solid #667eea;
}

.chinese-text {
  font-family: 'Noto Sans SC', sans-serif;
}

.example-description {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 0.9rem;
  color: #666;
  line-height: 1.5;
}

/* Button Styles */
.btn {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: #333;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* Search Styles */
.search-container {
  margin-bottom: 2rem;
}

.search-input {
  width: 100%;
  padding: 1rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  color: #333;
  transition: all 0.3s ease;
}

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

.search-input::placeholder {
  color: #999;
}

/* Filter Styles */
.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.filter-select {
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  color: #333;
  font-size: 0.9rem;
  min-width: 150px;
}

.filter-select:focus {
  outline: none;
  border-color: #667eea;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Home Page Styles */
.hero {
  text-align: center;
  padding: 4rem 0;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  color: white;
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.feature-grid {
  margin-top: 4rem;
}

.feature-card {
  text-align: center;
  padding: 2rem;
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: #333;
}

.feature-card p {
  color: #666;
}

/* Loading States */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(102, 126, 234, 0.3);
  border-top: 3px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Error States */
.error {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid rgba(239, 68, 68, 0.2);
  margin: 1rem 0;
}

/* Success States */
.success {
  background: rgba(34, 197, 94, 0.1);
  color: #059669;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid rgba(34, 197, 94, 0.2);
  margin: 1rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
  }
  
  .header {
    padding: 1rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav {
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .filters {
    flex-direction: column;
  }
  
  .filter-select {
    min-width: auto;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .card {
    padding: 1.5rem;
  }
  
  .example-card {
    padding: 1rem;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .nav {
    flex-direction: column;
    gap: 0.5rem;
  }
}