body {
  margin: 0;
}

header {
  position: sticky;
  display: flex;
  top: 0;
  height: 5vh;
  padding: 10px;
}

.card > header > h3 {
  color: white;
}

section {
  position: relative;
  height: 100vh;
}

main {
  height: 95vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card > main > div {
  position: relative;
}

.card > main > div > p {
  margin-top: 0;
  text-align: center;
  font-size: 150px;
  font-weight: bold;
  color: black;
}

.card-1 > header {
  background-color: red;
}

.card-2 > header {
  background-color: navy;
}

.card-3 > header {
  background-color: #313131;
}

.card-4 > header {
  background-color: maroon;
}

.card-1 > main {
  background-color: white;
}

.card-2 > main {
  background-color: dodgerblue;
}

.card-3 > main {
  background-color: dimgray;
}

.card-4 > main {
  background-color: orangered;
}