body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f9;
  display: flex;
  justify-content: center;
  padding-top: 50px;
}
.container {
  background: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  width: 700px;
}
.list-section {
  margin-top: 20px;
}
.list-section h2 {
  font-size: 16px;
  color: #555;
  border-bottom: 2px solid #eee;
  padding-bottom: 6px;
}
form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
input {
  flex: 1;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
}
button {
  padding: 8px 12px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background-color: #0056b3;
}
ul {
  list-style: none;
  padding: 0;
}
li {
  padding: 10px;
  border-bottom: 1px solid #eee;
}