*{
  margin:0;
  padding:0;
  box-sizing: border-box;
  color:#fff;
  font-family: 'Arial', sans-serif;
}

body{
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 100vh;
  background-color: #000;
}

.container{
  display: flex;
  flex-direction: column;
  align-items: center;
}

.color-container{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

p{
  font-size: 2.2rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom:30px;
}

.btn{
  margin:12px;
  border:none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  width:100px;
  height: 100px;;
  padding:20px 20px;
}

#btn1{
  background-color: red;
}

#btn2{
  background-color: blue;
}

#btn3{
  background-color: green;
}

#btn4{
  background-color: yellow;
}

.btn:active{
  transform: scale(0.98);
}

.active{
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.5);
}

.level{
  width:100px;
  background-color: #fff;
  padding:12px 18px;
  color: #000;
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 30px;
  border-radius: 8px;
}

.level>span{
  color: #000;
  margin-left:10px;
}

.text{
  margin-top:30px;  
  font-size: 1.5rem;
  font-weight: 600;
}

.button-container{
  display: flex;
  justify-content: space-between;
  width:500px;
  margin-top:1.5rem;
}

.start{
  background-color: #fff;
  color:#000;
  padding:12px 22px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
}

.continue{
  background-color: #fff;
  color:#000;
  padding:12px 22px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
}

.continue:disabled{
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}