body {
  font-family: sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 700px;
  margin: auto;
}

input {
  width: 100%;
  padding: 12px;
  font-size: 1em;
  margin-bottom: 20px;
}

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

li {
  background: #fff;
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}