game.css

.choice-container {
  display: flex;
  margin-bottom: 0.5rem;
  width: 100%;
  font-size: 1.8rem;
  border: 0.1rem solid rgb(86, 165, 235, 0.25);
  background-color: white;
}

.choice-container:hover {
  cursor: pointer;
  box-shadow: 0 0.4rem 1.4rem 0 rgba(86, 185, 235, 0.5);
  transform: translateY(-0.1rem);
  transition: transform 150ms;
}

.choice-prefix {
  padding: 1.5rem 2.5rem;
  background-color: #56a5eb;
  color: white;
}

.choice-text {
  padding: 1.5rem;
  width: 100%;
}

.correct {
  background-color: #28a745;
}

.incorrect {
  background-color: #dc3545;
}

/* HUD */

#hud {
  display: flex;
  justify-content: space-between;
}

.hud-prefix {
  text-align: center;
  font-size: 2rem;
}

.hud-main-text {
  text-align: center;
}

#progressBar {
  width: 20rem;
  height: 4rem;
  border: 0.3rem solid white;
  margin-top: 1.5rem;
}

#progressBarFull {
  height: 3.4rem;
  background-color: rgb(25, 108, 141);
  width: 0%;
}

/* LOADER */
#loader {
  border: 1.6rem solid white;
  border-radius: 50%;
  border-top: 1.6rem solid #56a5eb;
  width: 12rem;
  height: 12rem;
  animation: spin 2s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

html {
  height:100%;
}

body {
  margin:0;
}

.bg {
  animation:slide 3s ease-in-out infinite alternate;
  background-image: linear-gradient(-60deg, #6c3 50%, #09f 50%);
  bottom:0;
  left:-50%;
  opacity:.5;
  position:fixed;
  right:-50%;
  top:0;
  z-index:-1;
}

.bg2 {
  animation-direction:alternate-reverse;
  animation-duration:4s;
}

.bg3 {
  animation-duration:5s;
}

h1 {
  font-family:monospace;
}

@keyframes slide {
  0% {
    transform:translateX(-25%);
  }
  100% {
    transform:translateX(25%);
  }
}