styles.css

/* core */
body {
  font-family: 'Lato', sans-serif;
  font-size: 16px;
  color: #282c34;
  margin: 0;
}

canvas#webgl { 
  display: none;
  width:100%;
  position: relative;
  z-index: 10;
  margin-bottom: 80px;
}

#home main {
  max-width: 960px;
  margin: auto;
  display: flex;
  flex-direction: column;
}

#manual main {
  display: flex;
  justify-content: center;
  width: 100%;
  height: fit-content;
  min-height: 100%;
}

#manual #sidenav a {
  padding-left: 2px;
  padding-right: 2px;
}

#manual #sidenav a.selected {
  background-color: bisque;
}

article {
  background-color: #ffffff;
  width: 100%;
  max-width: 800px;
  padding: 64px 32px 32px 64px;
  line-height: 1.5em;
}

article img {
  max-width: 100%;
  height: auto;
}

article h1 {
  font-size: 32px;
  margin: 0 0 32px 0;
}

article h2 {
  font-size: 28px;
  margin: 32px 0;
}

article h3 {
  font-size: 24px;
  margin: 32px 0;
}

article h1 a, article h2 a {
  text-decoration: none;
}

footer {
  height: 120px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 80px;
  color: #ffffff;
  background-color: #282c34;
}

footer p {
  margin: 0;
}

footer img {
  width: 24px;
  margin: 0 8px;
}

a {
  color: unset;
}

section {
  margin-top: 48px;
}

@media screen and (min-width: 960px) {

  body {
    font-size: 20px;
  }

  body#manual {
    display: flex;
    flex: 0;
  }

  canvas#webgl {
    display: block;
  }

  #home section {
    margin-top: 100px;
  }

  article {
    box-shadow: 10px 10px 40px 0 rgba(46, 52, 92, 0.25);
    margin: 5% 5%;
    padding: 80px;
  }

  footer {
    margin-top: 100px;
  }
}
/* hero component */

#hero {
  /* width: 45%; */
  /* max-width: 600px; */
  position: relative;
  width: 100%;
  background-color: #ffffff;
  z-index: 20;
}

#hero > .title {
  height: 283px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#hero > .title img {
  max-width: 400px;
}

@media screen and (max-width: 959px) {
  #hero > .title img {
    width: 75%;
  }
}

#hero > .content {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
}

#hero > .content > p {
  width: 70%;
}

#hero > .content > div {
  display: flex;
  justify-content: center;
}

#hero .btn {
  margin: 16px 10px;
  padding: 12px 32px;
}

#version {
  position: absolute;
  top: 485px;
  right: 100px;
  font-size: 14px;
  color: #e61c39;
  width: 180px;
  text-align: center;
  text-transform: none;
}

@media screen and (min-width: 960px) {
  #hero {
    width: 600px;
    height: 566px;
    position: absolute;
    bottom: 0;
    right: 5%;
  }
}

/* navbar component */

#navbar {
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  background-color: #ffffff;
  padding: 12px;
  z-index: 999;
  position: fixed;
  top: -100px;
  left: 0;
  right: 0;
  transition-duration: 500ms;
  align-content: center;
}

#navbar > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
}

#navbar img {
  width: 240px;
  height: 24px;
  margin: 16px 16px;
}

.shownav {
  top: 0 !important;
  transition-duration: 500ms;
}

/* screenshot component */

section.screenshot img {
  max-width: 100%;
}

/* feature component */

section.feature {
  width: 100%;
  height: 540px;
  background-color: #eee;
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
}

section.feature1 {
  background-image: url('img/feature1.png');
}

section.feature2 {
  background-image: url('img/feature2.png');
}

section.feature3 {
  background-image: url('img/feature3.png');
}

section.feature:nth-child(even) {
  justify-content: flex-start;
}

section.feature > div {
  background-color: #ffffff;
  width: 100%;
  padding: 0 32px;
}

@media screen and (min-width: 960px) {
  section.feature > div {
    width: 600px;
    padding: 32px 64px;
  }
}

/* game component */

.hidden {
  display: none;
}

section.games {
  width: 100%;
}

@media screen and (max-width: 959px) {
  section.games {
    display:none;
  }
}

section.games a {
  text-decoration: none;
}

section.games .title {
  font-size: 0.8em;
  font-weight: bold;
  margin-bottom: 4px;
}

section.games .author {
  font-size: 0.6em;
  margin-top: 0;
}

section.games > div {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}

section.games .game > div {
  width: 300px;
  height: 240px;
  background-color: #d8d8d8;
}

section.games .game .cover {
  background-position: center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  cursor: pointer;
}

.game {
  max-width: 300px;
}

/* call-to-action component */

section.cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

section.cta > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 32px;
}

section.cta .download {
  
}

section.cta .manual {

}

section.cta .manual > .content {
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 32px;
}

@media screen and (min-width: 960px) {
  section.cta > div {
    width: 352px;
    padding: 32px 64px;
  }
}

@media screen and (max-width: 959px) {
  .hide-mobile {
    display: none !important;
  }
}

/* Social */

section.social h1 {
  text-align: center;
}

section.social .social-container {
  display: flex;
  justify-content: space-evenly;
}

section.social .flex1 {
  flex: 1;
}

section.social .social-link {
  text-align: center;
}

section.social .flex2 {
  flex: 2;
}

section.social img {
  width: 48px;
}

@media screen and (max-width: 959px) {
  section.social img {
    width: 24px;
  }

  section.social {
    margin-bottom: 32px;
  }
}

/* side nav */

#sidenav {
  flex: 0 0 auto;
  height: 100%;
  width: 100%;
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  background-color: #ffffff;
  overflow-x: hidden;
  transition: 0.5s;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 16px;
  font-weight: bold;
}

#sidenav ol {
  padding-inline-start: 15px;
  margin: 8px 0;
}

#sidenav li {
  list-style-type: none;
  padding: 5px;
}

#sidenav li a {
  text-decoration: none;
}

#sidenav span {
  font-size: 18px;
}

#sidenav .sub-section {
  font-weight: normal;
}

#sidenav-spacer {
  flex: 0 0 auto;
  width: 0;
  transition: 0.5s;
}

#open {
  cursor: pointer;
  position: fixed;
  top: 10;
  left: 10;
}

@media screen and (min-width: 960px) {
  #close {
    opacity: 0;
  }
  .hide-sidebar {
    
  }
}

@media screen and (max-width: 959px) {
  #close {
    cursor: pointer;
    align-self: flex-end; 
    margin: 10px;
  }
  .hide-sidebar {
    width: 0 !important;
  }
}


@media screen and (min-width: 960px) {
  #sidenav {
    width: 320px;
  }

  #sidenav-spacer {
    width: 320px;
  }
}

/* modifiers */

.btn {
  text-transform: uppercase;
  text-decoration: none;
  padding: 8px 24px;
  margin: 0 16px;
  border-radius: 8px;
}

.shadow {
  box-shadow: 10px 10px 40px 0 rgba(46, 52, 92, 0.25);
}

.gradient {
  background-image: linear-gradient(to bottom, #e61c39, #d61d8c);
  color: #ffffff;
}

.icon-bg {
  background-color: #eee;
  background-image: url('img/icons-bg.png');
}

.border {
  border: solid 1px;
}

.sticky {
  padding-top: 60px;
}

.inverted {
  -webkit-filter: invert(100%); /* Safari 6.0 - 9.0 */
  filter: invert(100%);
}

.down-eight {
  position: relative;
  top: 8;
}

code {
  background-color: #eee;
  font-size: 0.8em;
}