body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    margin: 40px;
}

.container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
}

input {
    width: 70%;
    padding: 12px;
    font-size: 16px;
}

button {
    padding: 12px 18px;
    cursor: pointer;
    margin-left: 10px;
}

.result {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
}