.flashcard-container{perspective:1200px}.flashcard-inner{transform-style:preserve-3d;transition:transform .5s}.flashcard-inner.flashcard-flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden}.flashcard-back{transform:rotateY(180deg)}@keyframes answer-pulse{0%{box-shadow:0 0 #34d3994d}70%{box-shadow:0 0 0 8px #34d39900}to{box-shadow:0 0 #34d39900}}@keyframes answer-shake{0%,to{transform:translate(0)}20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-3px)}80%{transform:translate(3px)}}@keyframes streak-bounce{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.answer-correct{animation:.6s answer-pulse}.answer-wrong{animation:.4s answer-shake}.streak-active{animation:.3s streak-bounce}