body {
  font-family: sans-serif;
  max-width: 700px;
  margin: 0 auto;
  padding: 20px;
}
input, textarea, button {
  display: block;
  margin: 10px 0;
  padding: 8px;
  width: 100%;
}
.card {
  border: 1px solid #ddd;
  padding: 15px;
  margin-bottom: 10px;
}
a {
  text-decoration: none;
  color: blue;
}