body {
  margin: 0;
  font-family: Arial, sans-serif;
  transition: 0.5s;
}

.container {
  padding: 20px;
}

.card {
  padding: 15px;
  margin: 10px 0;
  border: 2px solid black;
  background: white;
}

button {
  margin-top: 10px;
  padding: 5px 10px;
  cursor: pointer;
}