body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px;
  width: 420px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
}

input {
  padding: 12px;
  width: 240px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  padding: 12px;
  margin-left: 6px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  opacity: 0.8;
}

ul {
  padding: 0;
  margin-top: 20px;
}

li {
  list-style: none;
  background: #f0f0f0;
  margin: 10px 0;
  padding: 12px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

li span {
  flex: 1;
  text-align: left;
}