body {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: black;
  background-size: cover;
  font-family: sans-serif;
}

.start-click {
  position: absolute;
  left: 50%;
  top: 5%;
  transform: translate(-50%, -50%);
  color: white;
  cursor: pointer;
}

.wrapper {
  width: 850px;
  display: flex;
  flex-direction: column;
}

video {
  margin: 10%;
}

.fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: rgba(255, 255, 54);
  z-index: -1;
}

.speed {
  height: 50px;
  background: #efefef;
  flex: 1;
  display: none;
  align-items: flex-start;
  margin: 10px;
  border-radius: 50px;
  border: ridge 10px rgba(15, 195, 255);
  box-shadow: inset 0 0 5px 2px black, 0 0 5px 2px black;
  overflow: hidden;
  margin: 10%;
}

.speed-bar {
  background: rgba(255, 255, 54);
  text-shadow: 1px 1px 0 rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  color: white;
  height: 100%;
  width: 0%;
}