html,
body {
  padding: 0;
  margin: 0; }

html {
  box-sizing: border-box;
  font-size: 16px;
  line-height: 1; }

body {
  background-color: #202428;
  color: #eee;
  font-family: 'Rubik', Arial, Helvetica, sans-serif;
  font-size: 100%;
  -webkit-text-size-adjust: 100%; }

h1, h2, h3, p {
  margin: 0.5em 0; }

h1 {
  font-size: 2.5rem;
  color: #f1a; }

h2 {
  font-size: 2rem; }

h3 {
  font-size: 1.5rem; }

a img,
:link img,
:visited img {
  border: 0; }

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

#header {
  margin: 0;
  width: 100%;
  background-color: #1c2024;
  border-bottom: 1px solid rgba(223, 239, 255, 0.08); }

#controls {
  max-width: 768px;
  min-width: 320px;
  margin: auto;
  display: grid;
  padding: 2rem 1rem;
  grid-gap: 1rem;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: repeat(3, auto); }

#instructions {
  grid-column: 1 / -1;
  position: relative;
  margin: 0 0 1rem; }

#btn_github {
  position: absolute;
  right: 0;
  top: 0; }

@media screen and (max-width: 540px) {
  #controls {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: repeat(4, auto); }
  #btn_github {
    position: relative;
    display: inline-block;
    margin: 1rem 0; } }

@media screen and (max-width: 360px) {
  #controls {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(7, auto); } }

#animation_container {
  min-width: 320px;
  padding: 2rem 0;
  display: flex;
  justify-content: center;
  align-items: center; }

#animation {
  position: relative;
  display: flex;
  align-items: center; }

#animation canvas {
  width: 100%; }

#codeblock {
  position: relative;
  padding: 0 1rem 1rem;
  max-width: 768px;
  min-width: 320px;
  margin: auto; }

#js_code {
  width: 100%;
  padding: 0.75rem; }

#btn_copy {
  position: absolute;
  right: 0;
  bottom: 0;
  margin: 1.75rem; }