layout.css

:root {
  --moondust: #999;
  --moon-size: 5em;
  --midnight-blue: #001;
  --starlight: #b0ac9e;
  --starlight-dark: #24241a;
  --sunlight: #bb4;
  --main-padding: 3rem;
  --owl-size: 150px;
}

@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 400;
  font-display: block;
  src: url(https://fonts.gstatic.com/s/oswald/v35/TK3_WkUHHAIjg75cFRf3bXL8LICs1_FvsUZiZQ.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* General stuff */
* {
  box-sizing: border-box;
}

html, body {
  font-family: 'Oswald', sans-serif;
}

body {
  background-color: var(--midnight-blue);
  color: var(--starlight);
  display: flex;
  flex-direction: column;
  font-family: 'Oswald', sans-serif;
  height: 100%;
  line-height: 1.5;
  /* Generally good practice, but specifically to allow hiding owl off screen */
  overflow-x: hidden;
  width: 100%;
}

/* My moon, my stars! */

/* Provide a conveniently hidden container for the stars */
.star-container {
  height: 100%;
  width: 100%;
  position: absolute;
  z-index: -1;
  overflow: hidden;
}

.star {
  color: var(--starlight);
  position: absolute;
  height: .5rem;
  width: .5rem;
  background-image: url("assets/star.svg");
  background-repeat: no-repeat;
  background-size: cover;
}


/* My moon */
.moon-container {
  position: absolute;
  right: var(--main-padding);
  top: var(--main-padding);
}
.moon {
  height: var(--moon-size);
  width: var(--moon-size);
}
.moon-mask {
  background-color: var(--midnight-blue);
  border-radius: 50%;
  height: var(--moon-size);
  opacity: .98;
  position: absolute;
  /* We modify this property via JS, but include a default value as a fallback */
  right: var(--main-padding);
  /* Give the moon a bit of an offset so it's not a perfect crescent */
  bottom: .07em;
  width: var(--moon-size);
}

a {
  color: inherit;
  text-decoration: none;
}
a:hover, a:focus {
  text-decoration: underline;
}

h1 {
  font-size: 2em;
  margin-bottom: .5rem;
}

/* Header */
header {
  align-items: center;
  border-bottom: var(--starlight-dark) solid .1em;
  display: flex;
  justify-content: flex-end;
  padding: 1rem;
}

nav ul {
  display: flex;
}
nav ul li {
  padding-left: 1em;
  padding-right: 1em;
}

/* Main content */
main {
  align-items: center;
  display: flex;
  flex-grow: 1;
  justify-content: center;
  height: 100%;
  padding: var(--main-padding);
  position: relative;
  width: 100%;
}
main a {
  color: var(--sunlight);
  font-style: bold;
}

/* Footer */
footer {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  padding: 1rem;
}

.icon {
  height: 1.5rem;
  width: 1.5rem;
}

.left-footer {
  align-items: center;
  display: flex;
  flex-flow: row wrap;
  justify-content: flex-start;
}
.left-footer > * {
  margin-right: 1em;
}

.credits {
  font-size: smaller;
  color: var(--starlight-dark);
}

.socials a:hover {
  text-decoration: none;
}