html,body {
  height: 100%;
  margin: 0;
  padding: 0;
  padding: 1px;
  box-sizing: border-box;
}

body {
  font-family: Arial;
  color: #333333;
}

.demo-notes {
  margin: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid #d5dbe3;
  background: #f7fafc;
  line-height: 1.5;
  color: #1f2933;
  box-sizing: border-box;
}

.demo-notes h1 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.demo-notes p {
  margin: 0.35rem 0 0;
}

.demo-notes--overlay {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 2;
  max-width: 420px;
  background: rgba(247, 250, 252, 0.96);
}

#chart-container {
  position: relative;
  height: 420px;
  border: 1px solid #aaa;
  margin: 0.5rem;
  overflow: auto;
  text-align: center;
}