#step-title {
  text-align: center;
}

#step-title h1.title {
  font-size: 70;
}

#step-title p {
  font-size: 25px;
  margin-top: 30px;
  color: rgba(0, 0, 0, 0.8);
}

.step.sim.foundation {
  background-color: white;
  width: 900px;
  height: 100px;
  padding: 50px;
  opacity: 1
}

.step.sim.active {
  color: black;
}

#step-sim-4 canvas {
  border-bottom: solid 20px black;
  opacity: .8;
}

#step-sim-7 {
  width: 800px;
  height: 600px;
  padding: 0
}

#step-good-news-proof-3 div i {
  display: block;
  position: relative
}

#step-good-news-proof-3 .a {
  left: 220px; bottom: 130px;
}

#step-good-news-proof-3 .b {
  left: 460px; bottom: 130px;
}

#step-good-news-proof-3 .c {
  left: 300px; bottom: 500px;
}

#step-good-news-proof-3 .d {
  left: 370px; bottom: 340px;
}

.impress-on-overview {
    color: #fff;
}

body.impress-on-step-simple-triangulation-better,
#step-simple-triangulation:not(.active) {
  transition-delay: 500ms
}

#step-edge-quad {
  height: 750px;
}

.active + #step-edge-reversed {
  opacity: 1
}

.active + #step-edge-reversed p, .active + #step-edge-reversed .arcs {
  opacity: 0;
}

#step-edge-reversed div {
  position: relative;
  height: 500px;
}

#step-edge-reversed canvas {
  position: absolute;
  left: 200px;
}

.step.active .flip {
  display: inline-block;
  transform: rotateX(360deg);
  transition: 1s;
  transition-delay: 1s;
}

#step-flip-algo-proof-1 {
  height: 700px;
}

#step-flip-algo-proof-2 div {
  position: relative;
  height: 500px;
}

#step-flip-algo-proof-2 canvas {
  position: absolute;
  left: 200px;
}

.active + #step-flip-algo-proof-2 {
  opacity: 1
}

.active + #step-flip-algo-proof-2 div :not(.step-1) {
  opacity: 0;
}

.active + #step-flip-algo-proof-2 p {
  opacity: 0;
}

#step-flip-algo-proof-2 div i {
  display: block;
  position: absolute;
}

#step-flip-algo-proof-2 .a {
  left: 260px; top: 110px;
}

#step-flip-algo-proof-2 .b {
  left: 240px; top: 380px;
}

#step-flip-algo-proof-2 .c {
  left: 585px; top: 380px;
}

#step-flip-algo-proof-2 .d {
  left: 360px; top: 0px;
}

#step-flip-algo-proof-2 .p {
  left: 560px; top: 160px;
}

#step-flip-algo-angles-2 div {
  position: relative;
}

#step-flip-algo-angles-2 div span {
  display: block;
  position: absolute;
}

#step-flip-algo-angles-2 div span.alpha {
  left: 154px; top: 120px;
}
#step-flip-algo-angles-2 div span.beta {
  left: 710px; top: 150px;
}
#step-flip-algo-angles-2 div span.alphaltbeta {
  left: 397px; top: 180px;
}

#step-ruppert-intro-1 {
  height: 700px;
}

#step-ruppert-intro-2 div {
  position: relative;
  height: 400px;
}

#step-ruppert-intro-2 div canvas {
  position: absolute;
  left: 250px;
}

.active + #step-ruppert-intro-2 {
  opacity: 1
}

.active + #step-ruppert-intro-2 canvas:not(.base),
.active + #step-ruppert-intro-2 p {
  opacity: 0
}

#step-encroached-edge {
  height: 850px;
}

#step-encroached-edge-sol div {
  position: relative;
  height: 400px;
}

#step-encroached-edge-sol div canvas {
  position: absolute;
  left: 250px;
}

.active + #step-encroached-edge-sol {
  opacity: 1
}

.active + #step-encroached-edge-sol p,
.active + #step-encroached-edge-sol canvas.step-2 {
  opacity: 0
}

#step-encroached-edge-sol.active canvas.step-1 {
  opacity: 0
}

#step-bad-tri-sol-1 {
  height: 700px;
}

#step-bad-tri-sol-2 div {
  position: relative;
  height: 400px;
}

#step-bad-tri-sol-2 div canvas {
  position: absolute;
  left: 250px;
}

.active + #step-bad-tri-sol-2 {
  opacity: 1
}

.active + #step-bad-tri-sol-2 p,
.active + #step-bad-tri-sol-2 canvas.step-2,
#step-bad-tri-sol-2.active canvas.step-1 {
  opacity: 0
}

#step-ruppert-visu p {
  font-size: 25px;
  font-family: 'Courier New', monospace;
}

#step-ruppert-visu select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  padding: 10px;
  background-color: transparent;
  border: solid 2px white;
  color: white;
  font-family: 'Courier New', monospace;
  font-size: 25px;
  display: inline-block;
  border-radius: 5px;
}

#step-ruppert-visu select option {
  background-color: white;
  color: black;
}

#overview { display: none }

/*
    We also make other steps visible and give them a pointer cursor using the
    `impress-on-` class.
*/


.impress-on-step-timeline-second .timeline-slide{
  opacity: 1;
}

.impress-on-overview 
.step {
    opacity: 1;
    cursor: pointer;
    font-size: .8em;
}

.impress-progressbar {
  position: absolute;
  right: 318px;
  bottom: 1px;
  left: 118px;
  border-radius: 7px;
  border: 2px solid rgba(100, 100, 100, 0.2);
}
.impress-progressbar DIV {
  width: 0;
  height: 2px;
  border-radius: 5px;
  background: rgba(75, 75, 75, 0.4);
  transition: width 1s linear;
}
.impress-progress {
  position: absolute;
  left: 59px;
  bottom: 1px;
  text-align: left;
  opacity: 0.6;
}

.substep { opacity: 0; }
        .substep.substep-visible { opacity: 1; transition: opacity 1s; }