body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
}

.container {
  background: white;
  padding: 20px;
  margin: 50px auto;
  width: 90%;
  max-width: 400px;
  border-radius: 10px;
  box-shadow: 0 0 10px #ccc;
  text-align: center;
}

input {
  display: block;
  width: 90%;
  padding: 10px;
  margin: 10px auto;
  font-size: 16px;
}

button {
  padding: 10px 20px;
  background: #0077cc;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

ul {
  text-align: left;
}