:root {
    --bg: #fff;
    --fg: #111;
    --muted: #666;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: var(--bg);
    color: var(--fg);
    font-family: Helvetica, Arial, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    text-align: center;
    padding: 2rem;
}

main {
    max-width: 42rem;
}

h1 {
    font-size: clamp(2rem, 8vw, 5rem);
    font-weight: 400;
    line-height: 1.05;
    margin: 0 0 2rem;
}

.answer {
    font-size: clamp(4rem, 22vw, 14rem);
    line-height: 0.9;
    margin: 0;
}

footer {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    font-size: 0.8rem;
    color: var(--muted);
}

@media (orientation: landscape) and (max-height: 500px) {
    body {
        padding: 1rem 2rem 4.5rem;
    }

    h1 {
        font-size: clamp(1.75rem, 6vw, 3rem);
        margin-bottom: 0.75rem;
    }

    .answer {
        font-size: clamp(4rem, 16vw, 8rem);
    }

    footer {
        bottom: 0.75rem;
        font-size: 0.75rem;
    }
}

a {
    color: inherit;
    text-underline-offset: 0.2em;
}