#flashcardContainer,#flashcard {
  max-width: 750px;
  text-align: center;
  margin: auto;
}


.card ,#flashcard{
  perspective: 1000px;
  margin: 20px 0;
  width: 100%;
  height: 200px;
  position: relative;
  cursor: pointer;

}


.front, .back {
    font-size: 18px;

    position: absolute;
    width: 100%;
    height: 100%;
    background: #eceff1;
    color: #263238;
    border: 1px solid #ddd;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    transition: transform 0.6s ease;
    padding: 20px;
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.front{
      border-bottom: 1px solid #b0bec5;
    font-weight: 600;

}
.back {
    font-size: 16px;

    background-color: #cfd8dc ;
    color: #37474f;
    transform: rotateY(180deg);
}

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

.card.flipped .back {
  transform: rotateY(360deg);
}

.controls button {
  margin: 10px;
  padding: 10px 20px;
  border: none;
  background: #0077cc;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

select {
  padding: 8px;
  margin-bottom: 10px;
}