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ease;-webkit-transform-style:preserve-3d}.flashcard-face{background:#fff;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;inset:0;justify-content:center;padding:2rem;position:absolute;text-align:center;touch-action:none}.flashcard-face-welsh{background:linear-gradient(180deg,#eef4de,#e3eccb)}.flashcard-face-back{transform:rotateY(180deg)}.fact-card-face{background:linear-gradient(180deg,#2c5439,#1b3a14);color:#fff}.revision-stack-button{align-items:center;background:rgba(44,84,57,.92);border:2px solid hsla(0,0%,100%,.94);border-radius:999px;color:#fff;display:inline-flex;font-size:1rem;font-weight:700;height:2.5rem;justify-content:center;left:1rem;position:absolute;top:1rem;width:2.5rem;z-index:6}.revision-stack-button-active{background:rgba(44,84,57,.98);box-shadow:0 10px 24px rgba(44,84,57,.28)}.revision-stack-tooltip{background:rgba(15,23,42,.86);border-radius:1rem;color:#d1fae5;left:1rem;max-width:14rem;padding:.8rem .95rem;position:absolute;top:4.2rem;z-index:6}.modal-backdrop{align-items:center;background:rgba(15,23,42,.42);display:flex;inset:0;justify-content:center;padding:1.25rem;position:fixed;z-index:40}.modal-backdrop-strong{background:rgba(55,65,81,.78)}.intro-demo-card{align-items:center;background:linear-gradient(180deg,#f8faef,#edf3d8);border:1px solid rgba(118,144,54,.24);border-radius:1.25rem;display:flex;height:7rem;justify-content:center;overflow:hidden}.intro-demo-flip-card,.intro-demo-swing-left,.intro-demo-swing-right{align-items:center;background:#fff;border-radius:1rem;box-shadow:0 18px 35px rgba(20,40,22,.16);color:#0f172a;display:flex;font-size:.95rem;font-weight:700;height:4.25rem;justify-content:center;width:7.5rem}.intro-demo-flip-card{animation:intro-flip 1.8s ease-in-out infinite}.intro-demo-swing-left{animation:intro-swing-left 1.8s ease-in-out infinite}.intro-demo-swing-right{animation:intro-swing-right 1.8s ease-in-out infinite}.celebration-burst{align-items:center;display:flex;justify-content:center;margin-top:.5rem;position:relative}.celebration-burst:before{background:radial-gradient(circle,hsla(53,98%,77%,.95) 0,hsla(53,98%,77%,.1) 45%,transparent 72%),conic-gradient(from 0deg,rgba(35,72,18,.25),rgba(250,204,21,.55),rgba(118,144,54,.28),rgba(35,72,18,.25));border-radius:999px;content:"";height:8.5rem;position:absolute;width:8.5rem;z-index:0}.celebration-icon{align-items:center;animation:celebration-pop .52s ease;border-radius:999px;display:flex;font-size:3rem;height:5.5rem;justify-content:center;position:relative;width:5.5rem;z-index:1}.celebration-icon-dragon{background:rgba(220,252,231,.92)}@keyframes celebration-pop{0%{opacity:0;transform:scale(.4) rotate(-14deg)}70%{opacity:1;transform:scale(1.1) rotate(4deg)}to{opacity:1;transform:scale(1) rotate(0deg)}}@keyframes intro-flip{0%,to{transform:rotateY(0deg)}50%{transform:rotateY(180deg)}}@keyframes intro-swing-left{0%,to{transform:translateX(0) rotate(0deg)}50%{transform:translateX(-1.4rem) rotate(-10deg)}}@keyframes intro-swing-right{0%,to{transform:translateX(0) rotate(0deg)}50%{transform:translateX(1.4rem) rotate(10deg)}}.disabled\:cursor-wait:disabled{cursor:wait}.disabled\:opacity-60:disabled{opacity:.6}