header {
  width: 100%;
  margin: 0;
  padding: 0;
  background-color: #4FC3F7;
  border-bottom: 3px solid #4CAF50;
}

header img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  display: block;
}

header h1 {
  text-align: center;
  margin: 0.5em 0;
  font-size: 2em;
  background-color: #4FC3F7;
  color: #000000;
}