html {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: black;
}

body {
  position: relative;
  width: 450px;
  height: 600px;
}

.game {
  position: absolute;
  background-color: black;
  z-index: -1;
  outline: 1px solid darkred;
  outline-offset: -1px;
}

.platform {
  position: absolute;
  background-color: white;
}

.divisor {
  position: absolute;
}

.frame {
  position: absolute;
  outline: 2px solid red;
  outline-offset: -2px;
  z-index: 1;
}

.frame::before {
  position: absolute;
  margin-top: -100px;
  width: inherit;
  height: 100px;
  background: black;
  content: "";
}

.ball {
  position: absolute;
  background-color: white;
}

.info-panel {
  position: absolute;
  background-color: black;
  z-index: 1;
}

.interface-button {
  z-index: 2;
  position: absolute;
  border: 2px solid red;
  font-size: xx-large;
  cursor: pointer;
  color: red;
}

.interface-button:focus {
  background-color: red;
}

.interface-button:hover {
  font-weight: bold;
}

.score {
  position: absolute;
  font-size: xx-large;
  color: white;
  z-index: 2;
}

.title {
  position: absolute;
  color: white;
  font-size: xx-large;
  text-align: center;
}

.player-pointer {
  position: absolute;
  color: white;
  font-size: large;
  z-index: 16;
}

#background {
  position: absolute;
  left: 0;
  right: 0;
  animation-name: moving-bg;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

@keyframes moving-bg {
  from {
    margin-top: 0px;
  }

  to {
    margin-top: 60px;
  }
}