body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
}

.output {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    visibility: hidden;
}
p, h3, h2 {
    margin: 0.5em;
}

input {
    text-align: center;
    margin: 0.5em;
    font-size: 1em;
    padding: 1em;
    border-radius: 7px;

}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #333;
        color: #f0f0f0;
    }
    input {
        background-color: #555;
        color: #f0f0f0;
    }
}