:root {
    --btn: #0d47a1;
    --btn-hover: #0b3a84;
    --link: #0d47a1;
    --hero: linear-gradient(135deg, #0b3e8e 0%, #426fb6 100%);
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --btn: #0d47a1;
        --btn-hover: #0a3981;
        --link: #6086c1;
        --hero: linear-gradient(135deg, #062048 0%, #0a3981 100%);
    }
}
:root[data-theme="dark"] {
        --btn: #0d47a1;
        --btn-hover: #0a3981;
        --link: #6086c1;
        --hero: linear-gradient(135deg, #062048 0%, #0a3981 100%);
}