body {
  background-color: #4287f5;
}

.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.banner {
  border-radius: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: #fff;
  min-width: 100%;
  min-height: 300px;
  padding: 40px
}

.banner div {
  margin-top: 40px;
}

footer {
  position: absolute;
  bottom: 10px;
}

@media screen and (width < 500px){
  .banner {
    padding: 20px;
  }
}