html body {
  min-height: 2400px;
}

header {
  position: sticky;
  top: 0;
  background: #333;
  color: white;
  padding: 15px;
  z-index: 1000;
}

.card-container {
display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  display: flex;
  flex-direction: column;
  background: white;
  overflow: hidden;
  margin: 15px;
  padding: 1vw;
  max-width: 90vw;
}

body {
  background-image: linear-gradient(red, lightblue, purple, blue);
}

.content {
  padding: 0.5em;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.image {
  width: 100%;
  height: auto;
}

.title {
  font-size: 1.5em;
  font-weight: bold;
  font-family: "Roboto Slab", serif;
  color: #000;
}

h1 {
	color: white;
  font-family: "Roboto Slab", serif;
  text-align: center;
}

@media (min-width: 700px) {
  .card {
    max-width: 40vw;
  }
}

@media (min-width: 1100px) {
  .card {
    max-width: 20vw;
  }
}