body {
  font-family: Arial, sans-serif;
  background-color: #fdfdfd;
  margin: 0;
  padding: 0;
  color: #333;
}
header, footer {
  background-color: #f0f0f0;
  padding: 1rem;
  text-align: center;
}
main {
  padding: 1rem;
}
section {
  margin-bottom: 2rem;
}
form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}
input[type="text"] {
  flex: 1;
  padding: 0.5rem;
}
button {
  padding: 0.5rem 1rem;
  cursor: pointer;
}
ul {
  list-style: none;
  padding-left: 0;
}
li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #ddd;
}