Sticky header layout

import Css
import Html.Styled as Html exposing (Html)
import Html.Styled.Attributes as Html


stickyHeader : Html msg
stickyHeader =
    Html.div
        []
        [ Html.header
            [ Html.css
                [ Css.position Css.sticky
                , Css.top <| Css.int 0
                ]
            ]
            []
        , Html.main_
            []
            []
        ]