.quizlet-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin:20px 0;padding:20px 0}.quizlet-card{perspective:1e3px;cursor:pointer;outline:none;border-radius:8px;transition:box-shadow .3s ease}.quizlet-card:hover{box-shadow:0 8px 16px rgba(0,0,0,.15)}.quizlet-card:focus{box-shadow:0 0 0 3px rgba(52,152,219,.3);outline:2px solid #3498db}.quizlet-card-inner{position:relative;width:100%;height:250px;transition:transform .6s;transform-style:preserve-3d}.quizlet-card.flipped .quizlet-card-inner{transform:rotateY(180deg)}.quizlet-card-front,.quizlet-card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:20px;box-sizing:border-box;border:2px solid #e0e0e0}.quizlet-card-front{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;font-weight:600}.quizlet-card-back{background:linear-gradient(135deg,#f093fb 0%,#f5576c 100%);color:#fff;transform:rotateY(180deg)}.quizlet-card-content{text-align:center;font-size:16px;line-height:1.6;word-wrap:break-word;overflow-wrap:break-word}@media(max-width:768px){.quizlet-container{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:15px;padding:15px 0}.quizlet-card-inner{height:200px}.quizlet-card-content{font-size:14px}}@media(max-width:480px){.quizlet-container{grid-template-columns:1fr}.quizlet-card-inner{height:180px}.quizlet-card-content{font-size:13px;padding:15px}}@media(prefers-color-scheme:dark){.quizlet-card-front{background:linear-gradient(135deg,#1e3c72 0%,#2a5298 100%);border-color:#444}.quizlet-card-back{background:linear-gradient(135deg,#d946a6 0%,#f97316 100%);border-color:#444}}