hugo-simpleIntro/layouts/_default/single.html

{{ define "main" }}

    <div>

        <div id="mainBG" style="background-image: url('{{ if $.Site.Params.mainbg }}{{ $.Site.Params.mainbg }}{{ else }}https://picsum.photos/1920/1080{{ end }}');">

            {{ partial "utilities/wave"}}

            <div class="centerAll space-y-4">
                <div class="title font-bold text-center">
                    {{if  $.Title }}<h1>{{ .Title }}</h1>{{else}}Missing Title{{end}}
                </div>
                <div class="text-4xl italic text-center">
                    {{if  $.Params.Author }} by {{ .Params.Author }}{{end}}
                </div>
            </div>
        </div>


        <main class="container mx-auto mt-8 px-4 xl:px-0 justify-around space-y-2.5 whitespace-normal text-justify">
            {{ .Content }}
        </main>

    </div>
{{ end }}