.content-area {
  width: 98%;
  height: 100%;

  display: flex;
  flex-direction: column;

  /* border: 3px solid blue; */
}

.header {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

h1 {
  font-size: clamp(16px, 2.5vmin, 30px);
  margin-bottom: 0.5rem;
}

h1 a {
  text-decoration: none;
  color: black;
}

h1 a:hover {
  color: cornsilk;
}

h3 {
  margin-top: 0;
}

.graph {
  flex: 1;

  display: flex;
  align-items: center;
  justify-content: center;

  min-height: 0;
  min-width: 0;
}

svg {
  /*
    Dit zegt: 
    Gebruik de beschikbare ruimte.
  */
  width: 90%;
  height: 100%;

  border: 3px solid green;
  background-color: darkseagreen;
}