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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f8f9fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 12px;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
}

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

h2 {
  color: #2c3e50;
  margin-bottom: 1rem;
  font-size: 1.8rem;
  border-bottom: 2px solid #3498db;
  padding-bottom: 0.5rem;
}

h3 {
  color: #34495e;
  margin: 1.5rem 0 1rem 0;
  font-size: 1.3rem;
}

.demo-container {
  margin: 2rem 0;
  padding: 1rem;
  border: 2px dashed #ddd;
  border-radius: 8px;
  background: #fafafa;
}

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

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

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

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

code:not([class]) {
  background: #f1f2f6;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.9em;
}

.code-block {
  position: relative;
  margin: 1rem 0;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #3498db;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.copy-btn:hover {
  opacity: 1;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.feature-card {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 6px;
  border-left: 4px solid #3498db;
}

.feature-card h4 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.warning {
  background: #fff3cd;
  border: 1px solid #ffeaa7;
  color: #856404;
  padding: 1rem;
  border-radius: 6px;
  margin: 1rem 0;
}

.info {
  background: #d1ecf1;
  border: 1px solid #bee5eb;
  color: #0c5460;
  padding: 1rem;
  border-radius: 6px;
  margin: 1rem 0;
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  .section {
    padding: 1rem;
  }
}