body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background-color: #f5f5f5;
  color: #222;
  line-height: 1.5;
}

h1 {
  text-align: center;
  margin-top: 1rem;
}

.intro {
  max-width: 700px;
  margin: 0.5rem auto 1.5rem;
  text-align: center;
  padding: 0 1rem;
  color: #444;
}

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 1rem;
  padding: 0 1rem 2rem;
}

.canvas-container {
  flex: 1 1 60%;
  min-width: 300px;
  background: #000;
  border: 2px solid #333;
  position: relative;
}

.side-panel {
  flex: 1 1 30%;
  max-width: 400px;
  background: #fff;
  border: 2px solid #ddd;
  padding: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.questionnaire {
  margin-bottom: 1.5rem;
}

.question {
  margin-bottom: 1rem;
}

.question label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: bold;
}

.question input[type="range"] {
  width: 100%;
}

.question input[type="submit"] {
  margin-top: 0.5rem;
  padding: 0.4rem 0.8rem;
  background-color: #333;
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
}

.question input[type="submit"]:hover {
  background-color: #555;
}

#axisChart {
  max-width: 100%;
}