I think the best solution would be to make your site responsive but as a quick solution you can scale the whole page down using transform: scale(0.7);
with a media query like this:
@media only screen and (max-width: 1024px) {
body {
-webkit-transform: scale(0.7);
-moz-transform: scale(0.7);
-ms-transform: scale(0.7);
-o-transform: scale(0.7);
transform: scale(0.7);
}
}
You might tweak the values to your specific needs.
More on media queries for standard devices.