How to Remove the border from Wordpress Twenty Sixteen Theme

today i removed the border in my other (wp) blog that uses the Wordpress Twenty Sixteen theme, using the following css code:

.site {
    margin: 0 auto !important;
}

body:not(.custom-background-image):before,
body:not(.custom-background-image):after {
    height: 0px !important;
}

Code and HowToS

i decided to start posting to this blog some HowToS and sample codes.

i want to use it as notebook for things i'd like to remember in case i need them in the future.

so you can expect to find useful stuff in the posts that follow...