:root{color-scheme:light;--paper:#eee9df;--ink:#292d27}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,Helvetica,sans-serif;background-image:radial-gradient(ellipse at 76% 42%,#faf7ef 0,transparent 53%)}
main{position:relative;min-height:100svh;overflow:clip}
.screen{position:absolute;inset:0;display:grid;place-items:center;padding:16px 12px}
[hidden]{display:none!important}
button{font:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
button:focus-visible{outline:3px solid #91432f;outline-offset:6px}
button:disabled{cursor:default}
.action{min-height:50px;width:240px;padding:14px 22px;border:1px solid var(--ink);border-radius:2px;background:var(--ink);color:#faf7ee;font-size:14px;letter-spacing:.3px;text-align:center;transition:background .2s}
.action:hover:not(:disabled){background:#46503f}
.shuffle-deck{position:relative;width:clamp(175px,29svh,310px);max-width:49vw;aspect-ratio:11/20;perspective:1400px}
.shuffle-card{position:absolute;inset:0;border-radius:3px;overflow:hidden;background:#fff;box-shadow:0 12px 25px #30302526,0 0 0 1px #c9c1ad;will-change:transform,opacity}
.shuffle-card img,.face img{display:block;width:100%;height:100%;object-fit:contain;user-select:none;-webkit-user-drag:none}
.result-content{display:flex;flex-direction:column;align-items:center;gap:23px;perspective:1600px}
.card{width:min(520px,calc((100svh - 164px) * .55),calc(100vw - 24px));aspect-ratio:11/20;padding:0;border:0;border-radius:3px;background:transparent;perspective:1600px;transform-origin:center}
.card-inner{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.card.flipped .card-inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;display:block;overflow:hidden;background:white;border-radius:3px;backface-visibility:hidden;-webkit-backface-visibility:hidden;box-shadow:0 16px 34px #30302526,0 1px 4px #252b2326}
.back{transform:rotateY(180deg)}
.flip-button{width:300px;max-width:calc(100vw - 32px);font-size:12px;letter-spacing:.15px}
.result-actions{display:flex;flex-direction:column;align-items:center;gap:8px}
.again-button{min-height:44px;padding:10px 24px;background:transparent;border:0;color:var(--ink);font-size:12px;text-decoration:underline;text-underline-offset:4px}
.again-button:hover:not(:disabled){color:#91432f}
.loading{position:absolute;left:calc(50% - 11px);top:calc(50% - 11px);height:22px;width:22px;border:1px solid #292d2726;border-top-color:#74776d;border-radius:50%;animation:turn 1s linear infinite}
.status{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.status.error{clip-path:none;width:calc(100% - 40px);height:auto;top:calc(50% + 42px);left:20px;text-align:center;white-space:normal;font-size:12px;color:#91432f}
@keyframes turn{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}