.ekg.pulse path{stroke:var(--mint);animation:pulseGlow .6s ease}.ekg.pulse-bad path{stroke:var(--coral);animation:pulseGlow .6s ease}.card{aspect-ratio:1/1;perspective:800px;cursor:pointer}.card-inner{position:relative;width:100%;height:100%;transition:transform .45s cubic-bezier(.2,.9,.3,1.1);transform-style:preserve-3d}.card.flipped .card-inner{transform:rotateY(180deg)}.card.matched .card-inner{transform:rotateY(180deg)}.face{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;border-radius:10px;backface-visibility:hidden}.face-back{background:var(--panel-light);border:1px solid var(--line)}.face-back::after{content:"";width:34%;height:34%;border-radius:50%;border:2px solid var(--line)}.face-front{background:var(--panel);border:1px solid var(--yellow);transform:rotateY(180deg);color:var(--yellow)}.card.matched .face-front{border-color:var(--mint);color:var(--mint);background:#12261f}.card.wrong .card-inner{animation:shake .4s ease}.face-front svg{width:46%;height:46%}.win.show{display:block}.sound-toggle.muted .on-icon{display:none}.sound-toggle.muted .off-icon{display:block}@media (max-width:420px){.face-front svg{width:52%;height:52%}}