/* Document */
body {
  font-family: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  margin: 0;
  padding: 0;
  width: 100vw;
  min-height: 100vh;
  background: #433535;
  font-size: 2vmin;
}
header {
  position: fixed;
  top: 0;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  align-content: center;
  align-items: center;
  width: 100vw;
}
header h1 {
  padding: 0;
  margin: 0.6em 0 0;
  font-size: 2em;
  color: #c0a670;
}
header quote {
  padding: 0;
  margin: 0.8em 0 0;
  font-size: 1.12em;
  color: #c0a670;
}
main {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  align-content: center;
  justify-content: center;
  align-items: center;
}
footer {
  position: fixed;
  bottom: 0;
  width: 100vw;
}
footer p {
  margin: 0 0 1em;
  font-size: 1em;
  color: #c0a670;
  text-align: center;
}
footer a {
  color: #c0a670;
}
/* Demonstration */
.text_to_animate {
  margin: 0;
  padding: 0;
  font-size: 3.5em;
  line-height: 1.5em;
  letter-spacing: 4px;
  text-align: center;
  color: #9fc95f;
  transition: transform 0.8s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}
.text_to_animate span {
  display: inline-block;
  z-index: 100;
  position: relative;
  top: 0;
  opacity: 1;
  letter-spacing: 4px;
  transform: rotateY(0deg);
  transition: top 1s cubic-bezier(0.64, -0.16, 0.15, 1.64), opacity 1s linear, letter-spacing 0.6s linear, transform 1s ease;
}
.text_to_animate span.letters_in_top {
  top: -100vh;
  opacity: 0;
}
.text_to_animate span.rotate_letters {
  transform: rotateY(1080deg);
  transition: transform 2s ease-in-out, letter-spacing 1s linear;
}
.text_to_animate span.space_letters {
  letter-spacing: 12px;
  transition: letter-spacing 1s linear, transform 2s ease-in-out;
}
.text_to_animate span.color_letters {
    color: #bdd656;
    text-shadow: 0 0 30px #cbe852;
}
.callback_anim {
  transform: rotateZ(-10deg) scale(1.2);
  transition: transform 0.8s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}