html, body {
  background: url("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQZb7ofUBgLNbPLFgqR-f0IPgI8tc5mCK3mCTceGTi1ghRnUY66qA");
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 1000px;
  color: rgb(11, 11, 30);
}

.row {
  padding: 20px;
}

.simon {
  margin: 10px auto;
  width: 450px;
  height: 450px;
  cursor: pointer;
  display: block;
}

.tile {
  border: 10px solid black;
  height: 170px;
  width: 170px;
  display: inline-block;
}

.activeTile {
  opacity: 0.6;
}

.red {
  background-color: rgb(255, 0, 0);
  border-radius: 0 170px 0 0;
}

.yellow {
  background-color: rgb(255, 255, 0);
  border-radius: 0 0 0 170px;
}

.blue {
  background-color: rgb(0, 0, 255);
  border-radius: 0 0 170px 0;
}

.green {
  background-color: rgb(0, 128, 0);
  border-radius: 170px 0 0 0;
}

.winnerAlert {
  color: black;
  font-weight: 600; 
  text-align: center;
  font-size: 32px;
  padding: 5px;
  display: none;
  background-color: #DEC08D;
  padding: 5px;
  border: 3px solid #7E5923;
}

.error {
  color: red;
  font-weight: 600;
  text-align: center;
  font-size: 16px;
  padding: 5px;
  border: 3px solid #7E5923;
  background-color: #DEC08D;
  display: none;
}

.roundsNow {
  color: #7E5923;
  border: 6px solid #7E5923;
  background-color: #DEC08D;
  height: 50px;
  width: 70px;
  margin: 0px auto;
  display: block;
  text-align: center;
  font-size: 30px;
}

.start {
  width: 100px;
  font-size: 18px; 
}

.col-md-6 .btn { 
  width: 130px;
  font-size: 16px;  
}

.btn {
  text-align: center;
  border: 3px solid #7E5923;
  background-color: #DEC08D;
  color: #7E5923;
  margin: 5px auto;
  display: block;
}

.btn:hover {
  background-color: #7E5923;
  color: white;
  font-weight: 600;
  cursor: pointer;
}

.btn:focus {
  outline: none;
  font-weight: 400;
  color: #7E5923;
}

@media screen and (max-width: 600px) {
  .simon {
    margin: auto;
    width: 300px;
    height: 300px;
  }

  .tile {
    height: 100px;
    width: 100px;
  }
}
@media screen and (max-width: 300px) {
  .simon {
    width: 250px;
    height: 250px;
    margin: 0px;
    padding: 0px;
  }

  .tile {
    height: 95px;
    width: 95px;
  }
}