:root {
    --text-colour: #000;
    --mid-colour: #ccc;
    --bg-colour: #fff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-colour: #ccc;
        --mid-colour: #555;
        --bg-colour: #333;
    }
}

html, body {
    margin: 0;
    padding: 0;
    background-color: #000;
    color: var(--text-colour);
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.wrapper {
    display: flex;
    flex-direction: row;
    max-width: 1200px;
    width: 100vw;
    height: 100svh;    
    margin:0 auto;
    background-color: var(--bg-colour);
}

@media (max-aspect-ratio: 1) {
    .wrapper {
        flex-direction: column;
    }
}