@media (prefers-color-scheme: light) {
    :root {
        --background: #FFFFFF;
        --main: #EEEEEE;
        --button: #DDDDDD;
        --button-hover: #D0D0D0;
        --text: #000000;
        --alt-text: #555555;
    }
}
@media (prefers-color-scheme: dark) {
    :root {
        --background: #111111;
        --main: #202020;
        --button: #333333;
        --button-hover: #3A3A3A;
        --text: #FFFFFF;
        --alt-text: #777777;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100dvh;
    padding: 16px;
    -webkit-tap-highlight-color: transparent;
}
main {
    margin-top: auto;
    margin-bottom: auto;
    background-color: var(--main);
    width: 100%;
    padding: 24px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
main a {
    display: block;
    text-align: center;
    padding: 14px;
    background-color: var(--button);
    color: var(--text);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: background-color 0.2s ease;
}
main a:hover {
    background-color: var(--button-hover);
}
footer {
    width: 100%;
    text-align: center;
    padding-top: 20px;
    padding-bottom: 10px;
}
footer a {
    color: var(--alt-text);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 10px;
    display: inline-block;
}
footer a:hover {
    text-decoration: underline;
}
h1 {
    text-align: center;
    margin-bottom: 8px;
}

@media (min-width: 768px) {
    body {
        padding: 40px;
    }
    main {
        max-width: 360px;
        padding: 30px;
    }
    main a {
        padding: 12px;
    }
}