.panel {
  border: 1px solid #ccc;
  margin-bottom: 1rem;
  border-radius: 6px;
  overflow: hidden;
}

.panel-header {
  background: #f0f0f0;
  padding: 0.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.panel-header h3 {
  margin: 0;
  font-size: 1rem;
}

.panel-content {
  padding: 1rem;
  transition: all 0.3s ease;
}

.panel-content.collapsed {
  display: none;
}

textarea {
  width: 100%;
  height: 150px;
  font-family: monospace;
}

iframe {
  width: 100%;
  height: 300px;
  border: 1px solid #aaa;
  background: white;
}

button.toggle-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
}