/* CSS RESET */
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,menu,nav,output,ruby,section,summary,time,mark,audio,video{border:0;font-size:100%;font:inherit;vertical-align:baseline;margin:0;padding:0}article,aside,details,figcaption,figure,footer,header,menu,nav,section{display:block}body{line-height:1}ol,ul{list-style:none}blockquote,q{quotes:none}blockquote:before,blockquote:after,q:before,q:after{content:none}table{border-collapse:collapse;border-spacing:0}.paragraph ul {list-style: disc; margin-left: 20px;}

*{-webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;}
body {background:black; min-height: 100vh; background-image: url('../images/background.jpg'); -webkit-background-size: cover!important; -moz-background-size: cover!important; -o-background-size: cover!important; background-size: cover!important; background-repeat: no-repeat; background-position: center; font-size: 14px;}
a { color:inherit; }

.centerImage{position: absolute; max-width: 95%; top: 50%; left: 50%; transform: translate(-50%, -50%);}
.centerImage img{float:left; width: 100%;}


@media screen and (max-width: 1000px) {
    .centerImage{
        width: 90%;
    }
}


h3 {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 20px;
	margin:0;
	padding:10px 5px 10px 5px;
}

<style>
center{max-width: 1600px; margin: auto;}
</style>