html {
  height: 100%;
  width: 100%;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  margin: 5px 0;
}

form {
  margin-top: 20px;
}

input {
  padding: 5px;
}

label {
  display: inline-block;
  margin-top: 10px;
}

button {
  margin-top: 10px;
  padding: 5px 10px;
}