body {
  font-family: Arial, sans-serif;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  background: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
  width: 300px;
  text-align: center;
}
button {
  margin-top: 10px;
  padding: 8px 14px;
  border: none;
  background: red;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background: #0056b3;
}
ul {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}
li {
  background: #eee;
  margin: 5px 0;
  padding: 8px;
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}