@import url('https://fonts.googleapis.com/css?family=Roboto:400,500,700&display=swap');

*, *::before, *::after { box-sizing: border-box; }

:root {
  --font-size: 16px;
  --line-height: 1.5em;
  --font-stack: "Roboto", "Helvetica", Arial, sans-serif;
  --text-color: #151515;
  --text-color-inverted: #fff;
  --background-color: #fff;
  --border-color: var(--text-color); /*#ccc;*/
  --link-color: #06c;
  --focus-color: #394d72;
  --hover-color: #f1483a;
  --ui-border-radius: 3px;
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0,0,0,0);
	border: 0;
}

body {
	margin: 0;
  font: var(--font-size)/var(--line-height) var(--font-stack);
  color: var(--text-color);
  background: var(--background-color);
}

a,
a:visited {
  --link-local-color: var(--link-color);
  color: var(--link-local-color);
}

a:hover {
  --link-local-color: var(--hover-color);
}

a:focus {
  --link-local-color: var(--focus-color);
}

.cta::after {
  display: inline-block;
  content: "";
  margin-left: .25rem;
  width: .5rem;
  height: .5rem;
  border-top: 2px solid var(--link-local-color);
  border-right: 2px solid var(--link-local-color);
  transform: rotateZ(45deg);
}

/* Typography */

h1 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.2em;
  font-weight: 500;
}

h2 {
  margin: 0;
  font-size: 0.875rem;
  line-height: var(--line-height);
  text-transform: uppercase;
}

h3 {
	margin: 0;
  font-size: 0.875rem;
  line-height: var(--line-height);
}

header p {
  margin: 0;
}

abbr {
	text-decoration: none;
	border-bottom: 1px dotted var(--text-color);
}

/* Layout */

.page {
  margin: 0 auto;
  max-width: 48rem;
  padding: 1rem;

	/* better sticky footer! */
	min-height: 100vh;
	display: grid;
	grid-template-columns: 1fr;
	grid-template-rows: auto 1fr auto;
	grid-gap: 1rem;
}

header,
.about {
  margin-bottom: 2rem;
}

.social {
  margin: 4rem 0;
  padding-top: 1.25rem;
  border-top: 0.125rem solid var(--border-color);
}

.social ul {
  position: relative;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 1rem;
}

.social li {
  display: flex;
}

.social a {
  --social-color: var(--text-color);
  --social-bg-color: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: baseline;
  flex: 1 1 auto;
  padding: 1rem;
  text-decoration: none;
  text-align: center;
  color: var(--social-color);
  background: var(--social-bg-color);
  border-radius: var(--ui-border-radius);
}

.social svg {
  width: 3rem;
	height: 3rem;
  fill: var(--social-color);
}

.github svg {
  width: 2.5rem;
  height: auto;
}

.social a:hover {
  --social-color: var(--text-color-inverted);
  --social-bg-color: var(--hover-color);
}

.social a:focus {
  --social-color: var(--text-color-inverted);
  --social-bg-color: var(--focus-color);
}

.social span {
  display: block;
  margin-top: auto;
  font-size: .875rem;
  line-height: 1.3em;
}

@media screen and (min-width: 48rem) {
  .page {
    padding: 2rem 1rem;
  }

  .social ul {
    grid-template-columns: repeat(6, 1fr);
  }
}