#center-container,
#flavour-text,
#footer {
  position: fixed;
  text-align: center;
}

#footer *,
a,
a:active,
a:visited {
  display: inline-block;
}

* {
  margin: 0;
  padding: 0;
}

:root {
  font-size: 2vmin;
  color: #eee;
}

@media screen and (max-device-width: 720px) {
  :root {
    font-size: 4vmin;
  }
}

body::before,
body::after,
html::before,
html::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: all 1s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  pointer-events: none;
  box-sizing: border-box;
}

html::before {
  z-index: 10;
  border: 20px solid;
}

html.expand-borders::before {
  border: 30px solid;
}

html::after {
  z-index: 5;
  background: radial-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.8)) center
    no-repeat fixed;
  opacity: 0;
}

html.dim-background::after {
  opacity: 100;
  pointer-events: auto;
  cursor: pointer;
}

body::before {
  z-index: -5;
  /*background: url(assets/bg_stars.jpg) center no-repeat fixed;*/
  background-size: cover;

  -webkit-filter: blur(5px);
  -ms-filter: blur(5px);
  filter: blur(5px);
  transition: filter 1s, -webkit-filter 1s, -ms-filter 1s;
}

body.blur-background::before {
  -webkit-filter: blur(10px);
  -ms-filter: blur(10px);
  filter: blur(10px);
}

body::after {
  z-index: -5;
  background: radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.2)) center
    no-repeat fixed;
  background-size: cover;
  opacity: 0.5;
  -webkit-filter: blur(5px);
  -ms-filter: blur(5px);
  filter: blur(5px);
}

body.blur-background::after {
  opacity: 1;
}

#center-container {
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

#canvas {
  z-index: -10;
  opacity: 20;
}

/* Text */

a,
a:active,
a:visited {
  text-decoration: none;
  color: #eee;
  transition: all 0.5s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
}

a.expand:hover {
  font-size: 1.05em;
}

a.underline {
  text-decoration: underline;
  color: #f44336;
  text-decoration-color: #90342c;
}

a.underline:hover {
  text-decoration-color: #eee;
}

h4 {
  font-size: 1.125em;
  line-height: 1.22em;
  font-weight: 400;
}

p {
  line-height: 2em;
  max-width: 66ch;
  font-family: "Open Sans", sans-serif;
}

em {
  color: #f44336;
  font-style: normal;
}

#main-text {
  font-family: "Amatic SC", cursive;
  font-weight: 700;
  font-size: 4em;
  line-height: 80px;

  transition: all 1s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  opacity: 0;
  -webkit-transform: translateY(30px);
  -ms-transform: translateY(30px);
  transform: translateY(30px);
}

#main-text.shown {
  opacity: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
}

#main-text.shown.shift {
  -webkit-transform: translateY(-40px);
  -ms-transform: translateY(-40px);
  transform: translateY(-40px);
}

/* Footer */

#footer {
  left: 50%;
  width: 100%;
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  transform: translateX(-50%);
  bottom: 30px;
}

#footer a p {
  padding: 10px;
}

.footer-content {
  transition: all 0.75s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  opacity: 0;
  -webkit-transform: translateY(8px);
  -ms-transform: translateY(8px);
  transform: translateY(8px);
}

.footer-content.shown {
  opacity: 100;
  -webkit-transform: translateY(0px);
  -ms-transform: translateY(0px);
  transform: translateY(0px);
}

/* Extras */

.extras {
  z-index: 10;
  position: absolute;
  top: 50%;
  left: 50%;
  max-height: 100%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  overflow: hidden;
  margin-top: 10px;
  text-align: center;
}

.extras.shown {
  pointer-events: auto;
  overflow: visible;
}

.extras-content {
  max-height: 100%;
  max-width: 650px;
  line-height: 1.6;
  transform: translateY(10px);
  opacity: 0;
  margin-bottom: 30px;
  overflow: hidden;
}

.extras-content > p {
  padding-block: 0.5rem;
}

.extras.shown .extras-content {
  transition: all 0.75s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  transform: translateY(0);
  opacity: 100;
  overflow: visible;
}

.extras.hidden .extras-content {
  transition: all 0.75s;
  transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  transform: translateY(-10px);
  opacity: 0;
}