regexper-static/src/style.css

@import url('//fonts.googleapis.com/css?family=Bangers&text=Regxpr');

:root {
  --color-green: #bada55;
  --color-brown: #6b6659;
  --color-tan: #cbcbba;
  --color-black: #000;
  --color-white: #fff;
  --color-red: #b3151a;

  --header-height: 6rem;
  --content-margin: 2rem;
  --spacing-margin: 1rem;
}

html {
  font-size: 62.5%;
}

body {
  margin: 0 var(--content-margin);
  padding: 0;
  font-family: sans-serif;
  background: var(--color-brown);
  font-size: 1.6rem;
}

#main {
  background: var(--color-green) linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.4) 100%);
  box-shadow: 0 0 1rem var(--color-black);
  padding: 0 var(--content-margin);
  margin: 0 calc(-1 * var(--content-margin)) var(--spacing-margin) calc(-1 * var(--content-margin));
  position: relative;
}

#main:after {
  content: attr(data-banner);
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  line-height: var(--header-height);
  text-transform: uppercase;
  text-align: center;
  font-size: calc(var(--header-height) * 0.7);
  font-weight: bold;
  opacity: 0.2;
}

#main h1 {
  font-family: 'Bangers', 'cursive';
  font-size: 4rem;
  font-weight: normal;
  display: inline-block;
  margin: 0;
  line-height: var(--header-height);
}

#main a {
  text-decoration: none;
  display: inline-block;
}

#main ul {
  line-height: var(--header-height);
  position: absolute;
  top: 0;
  right: var(--content-margin);
}

#main li a:hover,
#main li a:active {
  text-decoration: underline;
}

#main li svg {
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-right: 0.5rem;
  vertical-align: text-top;
}

footer {
  margin: var(--spacing-margin) 0;
}

footer img {
  vertical-align: text-top;
  width: 80px;
  height: 15px;
}

a {
  color: inherit;
}

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

li {
  list-style-type: none;
  display: inline-block;
}

.inline-list li {
  white-space: nowrap;
}

.inline-list li:after {
  content: '//';
  padding: 0 0.5rem;
}

.inline-list li:last-child:after {
  content: '';
}

.message {
  background: var(--color-tan);
  padding: var(--spacing-margin);
  margin: var(--spacing-margin) 0;
}

.message h2 {
  margin: var(--spacing-margin) 0;
}

.message h2 svg {
  margin-right: 0.5rem;
  height: 3rem;
  width: 3rem;
  vertical-align: bottom;
}

.message p {
  margin: var(--spacing-margin) 0;
}