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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
  padding: 1rem;
}

.container {
  max-width: 56rem;
  margin: 0 auto;
}

h1 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: #7f8c8d;
  margin-bottom: 2rem;
}

.demo__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 2rem 0;
}

.demo__card {
  background: white;
  border-radius: 0.5rem;
  padding: 0.5rem;
  box-shadow: 0 0.5rem 0.5rem rgba(0, 0, 0, 0.1);
  margin: 0;
}

.demo__card h2 {
  color: #34495e;
  margin-bottom: 0;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: background-color 0.2s;
}

.demo__card h2:hover {
  background-color: #f5f5f5;
}

.demo__card h2::before {
  content: "▶";
  font-size: 0.8rem;
  color: #7f8c8d;
  transition: transform 0.2s;
  margin-right: 0.5rem;
}

.demo__card--expanded h2::before {
  transform: rotate(90deg);
}

.demo__card-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 1rem;
}

.demo__card--expanded .demo__card-content {
  max-height: 10000px;
  transition: max-height 0.5s ease-in;
  padding-top: 1rem;
}

.demo__badge {
  display: inline-block;
  padding: 0.5rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: bold;
  text-transform: uppercase;
}

.demo__badge--skulpt {
  background: #e8f5e9;
  color: #2e7d32;
}

.demo__badge--pyodide {
  background: #e3f2fd;
  color: #1565c0;
}

.demo__trace-section {
  margin-bottom: 1rem;
}

.demo__trace-section h3 {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-bottom: 0.5rem;
}

.demo__trace-raw {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: #d32f2f;
  margin-bottom: 1rem;
}

.demo__code-example {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 0.5rem;
  padding: 1rem;
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.demo__explanation {
  border-top: 2px solid #e9ecef;
  padding: 1rem;
  background: #fafbfc;
  border-radius: 0.5rem;
  margin-top: 1rem;
}

.demo__explanation h3 {
  margin-top: 0;
  margin-bottom: 1rem;
}

.pfem__title {
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.pfem__summary {
  color: #2c3e50;
  margin-bottom: 1rem;
  line-height: 1.6;
  font-size: 1rem;
}

.pfem__why {
  color: #555;
  font-style: italic;
  margin: 1rem 0;
  padding: 1rem 1rem;
  padding-left: 1rem;
  border-left: 0.5rem solid #3498db;
  background: #f0f7ff;
  border-radius: 0.5rem;
  line-height: 1.6;
}

.pfem__steps li {
  margin-left: 1rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
  line-height: 1.6;
  text-align: left;
}

.pfem__patch {
  background: #e8f5e9;
  border: 1px solid #4caf50;
  border-radius: 0.5rem;
  padding: 1rem 1rem;
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
  font-size: 0.9rem;
  color: #1b5e20;
  margin: 1rem 0;
  line-height: 1.5;
}

.pfem__details {
  margin-top: 1rem;
}

.pfem__details summary {
  cursor: pointer;
  color: #7f8c8d;
  -webkit-user-select: none;
  user-select: none;
}

.pfem__details pre {
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 0.5rem;
  padding: 0.5rem;
  margin-top: 0.5rem;
  overflow-x: auto;
}

.demo__error {
  background: #ffebee;
  border: 1px solid #ef5350;
  border-radius: 0.5rem;
  padding: 1rem;
  color: #c62828;
  margin: 0.5rem 0;
}