JSFiddle - React, Tailwind, and code Playground

HTML

<div id="page">
        <div id="bar-header">Header</div>
        <div id="content">
            <div class="content-section">
                <h2>Content 1</h2>
                <a name="section-1"></a>
            </div>
            <div class="content-section">
                <h2>Content 2</h2>
                <a name="section-2"></a>
            </div>
            <div class="content-section">
                <h2>Content 2</h2>
                <a name="section-2"></a>
            </div>
            <div class="content-section">
                <h2>Content 4</h2>
                <a name="section-2"></a>
            </div>
        </div>
        <div id="bar-footer">Footer</div>
    </div>

CSS

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, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}

body {
            margin: 0;
            padding: 0;
            background: transparent;
            width: 1280px;
            height: 720px;
        }

        #content {
            position: fixed;
            top: 0px;
            left: 0px;
            width: 1280px;
            height: 720px;
            outline: 1px solid red;
        }

        ul {
            list-style-type: none;
            margin: 0px;
            padding: 0px;
        }

        #bar-header, #bar-footer {
            position: fixed;
            left: 0px;
            width: 1280px;
            height: 30px;
            background-color: darkgray;
        }
        #bar-header {
            top: 0px;
        }

        #bar-footer {
            top: 690px;
        }
        .content-section {
            background-color: lightgray;
            outline: 1px solid black;
            height: 300px;
        }