body {
  font-family: sans-serif;
}

.card {
  width: 400px;
  max-width: 90vw;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
}

label {
  margin-bottom: 8px;
  display: block;
}

input {
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
}

input:focus {
  outline: none;
  border: 1px solid #2563eb;
}

hr {
  border: none;
  height: 1px;
  background-color: #e0e0e0;
  margin: 20px 0;
}

.output-content {
  text-align: center;
  font-size: 2rem;
  font-weight: bold;
  color: #049b81;
}