body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
}

label {
    display: block;
    margin: 10px 0 5px;
}

input {
    width: calc(100% - 20px);
    padding: 10px;
    margin-bottom: 20px;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

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

#result {
    margin-top: 20px;
    text-align: center;
    font-size: 1.2em;
}