body {
  text-align: center;
  background-color: #011F3F;
}

#level-title {
  font-family: 'Press Start 2P', cursive;
  font-size: 3rem;
  margin:  5%;
  color: #FEF2BF;
}
#footer {
  position: fixed;
  bottom: 10px;
  right: 10px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  font-family: 'Press Start 2P', cursive;
  z-index: 999;
}

.container {
  display: block;
  width: 50%;
  margin: auto;

}

.btn {
  margin: 25px;
  display: inline-block;
  height: 200px;
  width: 200px;
  border: 10px solid black;
  border-radius: 20%;
}
.btnStart {
  margin: 10px;
  display: flex;
  position: fixed;
  top: 0;
  right: 0;
  height: 100px;
  width: 100px;
  border: 5px solid #388E3C;
  border-radius: 20%;
  background-color: #4CAF50;
  cursor: pointer;
}

#startButton {
  justify-content: center;
  align-items: center;
  color: rgb(207, 207, 207);
  font-size: 50px;
}
.btnStart:hover{
  background-color: #388E3C;
  border-color: #4CAF50;
}

.game-over {
  background-color: red;
  opacity: 0.8;
}

.red {
  background-color: red;
}

.green {
  background-color: green;
}

.blue {
  background-color: blue;
}

.yellow {
  background-color: yellow;
}

.pressed {
  box-shadow: 0 0 20px white;
  background-color: grey;
}

.pressedStart {
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.5);
  background-color: #388E3C;
}

@keyframes gradientAnimation {
  0% { background: linear-gradient(45deg, #ffefba, #ffffff); }
  50% { background: linear-gradient(45deg, #ffffff, #ffefba); }
  100% { background: linear-gradient(45deg, #ffefba, #ffffff); }
}

.gradient-bg { 
  /* was an idea to add it when reaching lvl 5 */
  animation: gradientAnimation 3s ease-in-out infinite;
}