body {
  font-family: system-ui, sans-serif;
  background-color: #f5f6fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  max-width: 400px;
  width: 100%;
  text-align: center;
}

h1 {
  margin-bottom: 0.5rem;
}

p {
  color: #555;
  font-size: 0.9rem;
}

.form {
  display: flex;
  margin-top: 1rem;
}

input {
  flex: 1;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 8px 0 0 8px;
  font-size: 1rem;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 0.6rem 1rem;
  font-size: 1rem;
  border-radius: 0 8px 8px 0;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #0056b3;
}

.result {
  margin-top: 1.5rem;
  font-weight: bold;
  word-break: break-all;
}