The page in portrait looks good, but in landscape, the main element is cut off a bit at the top and only scrolls down.
This is the page in landscape mode.

Below is snippet of the CSS code for the body and main elements.
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
width: 1440px;
max-width: 1440px;
font-family: 'Red Hat Display', sans-serif;
font-size: 100%;
background-color: hsl(225, 100%, 94%);
background-image: url(/images/pattern-background-desktop.svg);
background-size: cover;
background-repeat: no-repeat;
width: 100%;
}
main {
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 500px;
height: 667px;
}