body {
  font-family:
    system-ui,
    -apple-system,
    sans-serif;
  /* max-width: 1200px; */
  margin: 2rem auto;
  padding: 0 1rem;
  background: #f5f5f5;
}
h1 {
  color: #333;
  margin-bottom: 2rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.panel {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.panel h2 {
  margin-top: 0;
  color: #3498db;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.output {
  background: #f8f9fa;
  padding: 1rem;
  border-radius: 4px;
  border: 1px solid #dee2e6;
  min-height: 100px;
  overflow: hidden;
}
.output img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  background: #3498db;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  margin-top: 0.5rem;
}
button:hover {
  background: #2980b9;
}
.data-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem;
  border-radius: 8px;
  margin: 0.5rem 0;
}
.metric {
  font-size: 2rem;
  font-weight: bold;
  margin: 0.5rem 0;
}
.label {
  opacity: 0.9;
  font-size: 0.9rem;
}
.loading {
  text-align: center;
  color: #666;
}
.spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #3498db;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 1rem auto;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}