body {
  font-family: Arial, sans-serif;
  margin: 20px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
h1 {
  text-align: center;
}
.form-group {
  margin-bottom: 10px;
}
label {
  display: block;
  margin-bottom: 5px;
}
select {
  width: 100%;
  padding: 5px;
}
button {
  padding: 10px 20px;
  font-size: 16px;
}
#results {
  margin-top: 20px;
}
.pet-card {
  border: 1px solid #ccc;
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 5px;
}
@media (max-width: 600px) {
  body {
    margin: 10px;
  }
}