body {
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f0f0;
}
.container {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px gray;
}