Hugo-theme-stack/layouts/404.html

{{ define "body_class" }}2-column{{ end }}
{{ define "main" }}
<div class="container extended flex on-phone--column align-items--flex-start">
    {{ partial "sidebar/left.html" . }}

    <main class="main full-width">
        <div class="not-found-card">
            <h1 class="article-title">{{ T "notFoundTitle" }}</h1>
            <h2 class="article-subtitle">{{ T "notFoundSubtitle" }}</h2>
        </div>
    </main>
</div>
{{ end }}