.flashcard-grid {
  display: grid;
  grid-template-columns: repeat(3, 500px); 
  justify-content: center; 
  grid-auto-rows: 1fr; 
  gap: 60px 60px;          
  padding: 60px 20px; 
  max-width: 1700px;   
  margin: 0 auto;
  overflow-x: hidden; 
}

.flashcard {
  background-color: transparent;
  width: 100%; 
  height: 100%; 
  perspective: 1200px; 
  position: relative;     
  transform: rotate(var(--rot, 0deg));
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1); 
}


.flashcard-grid > :nth-child(6n+4),
.flashcard-grid > :nth-child(6n+5),
.flashcard-grid > :nth-child(6n+6) {
  transform: rotate(var(--rot, 0deg)) translateX(275px); 
}

.flashcard-grid > :nth-child(6n+4):hover,
.flashcard-grid > :nth-child(6n+5):hover,
.flashcard-grid > :nth-child(6n+6):hover {
  transform: rotate(0deg) translate(275px) scale(1.02);
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%; 
  
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
  transform-style: preserve-3d;
  box-shadow: 0 10px 20px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.05); 
  border-radius: 8px; 
}


.flashcard:hover {
  transform: rotate(0deg) translateY(-8px) scale(1.02); 
  z-index: 15; 
}



.flashcard:hover .card-inner {
  transform: rotateY(180deg);
  box-shadow: 0 20px 35px rgba(38, 29, 20, 0.15), 0 10px 15px rgba(38, 29, 20, 0.1);
}

.card-front, .card-back {
  grid-column: 1;
  grid-row: 1;
  
  width: 100%;
  height: 100%; 
  
  backface-visibility: hidden; 
  -webkit-backface-visibility: hidden; 
  border-radius: 8px; 
  box-sizing: border-box;
  background-color: #fdfae6; 
  
  background-image: linear-gradient(#cce6ff 1px, transparent 1px);
  background-size: 100% 24px; 
  background-position-y: 23px; 
  overflow: hidden; 
}

.card-front::before, .card-back::before {
  content: '';
  position: absolute;
  top: 0;
  width: 12px;
  height: 100%; 
  background-image: radial-gradient(circle, #b5b09c 40%, transparent 45%);
  background-size: 100% 24px;
  background-position-y: 12px;
  opacity: 0.3;
}

.card-front {
  padding: 24px 24px 24px 65px; 
  text-align: left;
  background-image: 
    linear-gradient(90deg, transparent 50px, #ff8da1 50px, #ff8da1 52px, transparent 52px),
    linear-gradient(#cce6ff 1px, transparent 1px);
}
.card-front::before {
  left: 12px; 
}

.card-back {
  padding: 24px 65px 24px 24px; 
  text-align: right; 
  transform: rotateY(180deg); 
  background-image: 
    linear-gradient(90deg, transparent calc(100% - 52px), #ff8da1 calc(100% - 52px), #ff8da1 calc(100% - 50px), transparent calc(100% - 50px), transparent),
    linear-gradient(#cce6ff 1px, transparent 1px);
}
.card-back::before {
  right: 12px; 
}

.card-front h3, .card-back h3 {
  margin: 0;
  padding-bottom: 24px;
  height: auto;
  line-height: 24px;
  color: #4a4538;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.card-front p, .card-back p {
  margin: 0;
  color: #2b2922;
  font-size: 16px;
  line-height: 24px; 
}

@media (max-width: 1650px) {
  .flashcard-grid {
    grid-template-columns: repeat(auto-fit, 500px);
  }
  .flashcard-grid > :nth-child(n) {
    transform: rotate(var(--rot, 0deg)) translateX(0);
  }
  .flashcard-grid > :nth-child(n):hover {
    transform: rotate(0deg) translateY(-8px) scale(1.02);
  }
}

@media (max-width: 550px) {
  .flashcard-grid {
    grid-template-columns: 1fr;
  }
  .flashcard {
    width: 90vw;      
    height: auto;
    min-height: 336px;
    transform: rotate(0deg) !important; 
  }
}