body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: #f0f0f0;
  font-family: "Yusei Magic", sans-serif;
}

/*------------ Logo Styles  -------------*/
.nav-brand {
  position: absolute;
  top: 20px;
  left: 20px;
}
.nav-brand .brand {
  position: absolute;
  top: 25px;
  color: #000;
}


.difficulty-selection {
  margin-bottom: 20px;
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.question {
  display: none;
  margin-bottom: 20px;
  font-size: 24px;
  font-weight: bold;
  text-align: center;
}

#game-container {
  display: none;
  /* display: flex; */
}

.card {
  width: 234px;
  height: 333px;
  background-size: cover;
  margin: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  position: relative;
  transition: transform 2s;
}

.card img {
  width: 100%;
  height: 100%;
  backface-visibility: hidden;  
}

.card.flipped {
  transform: rotateY(180deg);

}
.message {
  margin-top: 20px;
  text-align: center;
  font-size: 18px;
}

.highlight-border {
  border: 4px solid #00ff26;
 
}

.score {
  margin-top: 30px;
  text-align: center;
  font-size: 18px;
}

#start-game {
  background-color: #4caf50;
  color: #ffffff;
  border: none;
  outline: none;
  padding: 10px 20px;
  font-weight: 700;
  font-size: 20px;
  border-radius: 5px;
  cursor: pointer;
}

#difficulty {
  width: 150px;
  font-size: 20px;
  height: 50px;
  outline: none;
  cursor: pointer;
}