JSFiddle - React, Tailwind, and code Playground

by tripleserpantine

HTML

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<link rel="stylesheet" type="text/css" href="main.css">
</head>
<body>
	<header>
		
	</header>
</body>
</html>

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;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, 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: '';
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
/* -ШРИФТЫ- */
<link href="https://fonts.googleapis.com/css?family=Nunito|Open+Sans+Condensed:300|Roboto+Condensed|Roboto+Slab&display=swap" rel="stylesheet">
header {
  width: 100%;
  height: 10%;
  background-color: black;
  margin-bottom: 10px;
  background-color: black;
  opacity: 0.8;
  position: fixed;
  z-index: 1;
}