body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f5f5f5;
}

.container {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 480px;
}

h1 {
    text-align: center;
    margin-bottom: 1rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

label {
    font-weight: bold;
}

input {
    padding: 0.5rem;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #007bff;
    color: #fff;
    padding: 0.5rem;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

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

.result {
    text-align: center;
    margin-top: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    .container {
        width: 90%;
        padding: 1.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    input {
        font-size: 14px;
    }

    button {
        font-size: 14px;
    }

    .result {
        font-size: 1rem;
    }
}