:root{color:#20201e;font-synthesis:none;text-rendering:optimizelegibility;--ink:#20201e;--muted:#6d6a63;--paper:#fffdf8;--line:#d9d2c6;--accent:#da5b3b;--accent-dark:#a83824;--teal:#1d7770;--yellow:#edb94e;background:#f4f0e8;font-family:Inter,Segoe UI,Tahoma,Arial,system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;min-width:320px}body{background:radial-gradient(circle at 15% 10%,#edb94e2b,#0000 25rem),radial-gradient(circle at 90% 85%,#1d77701c,#0000 28rem),#f4f0e8;min-width:320px;min-height:100vh;margin:0}button,a{font:inherit}button{color:inherit}button:focus-visible,a:focus-visible{outline-offset:3px;outline:3px solid #1686d9}.app-shell{width:min(1160px,100% - 40px);margin:0 auto;padding-bottom:48px}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;min-height:78px;display:flex}.brand{color:var(--ink);letter-spacing:-.03em;align-items:center;gap:10px;font-weight:800;text-decoration:none;display:inline-flex}.brand-mark{color:#fff;background:var(--ink);border-radius:8px;place-items:center;width:38px;height:38px;display:grid;transform:rotate(-3deg)}.language-button,.restart-button,.play-again{cursor:pointer;border-radius:6px;justify-content:center;align-items:center;gap:8px;font-weight:700;display:inline-flex}.language-button{border:1px solid var(--line);background:#fffdf8b3;padding:9px 13px}.language-button:hover{border-color:var(--ink);background:var(--paper)}.hero{justify-content:space-between;align-items:end;gap:40px;padding:48px 0 34px;display:flex}.eyebrow{color:var(--accent-dark);text-transform:uppercase;letter-spacing:.09em;align-items:center;gap:7px;margin:0 0 10px;font-size:.78rem;font-weight:800;display:flex}h1{letter-spacing:-.055em;max-width:680px;margin:0;font-size:clamp(2.05rem,5vw,4.15rem);line-height:1.06}.intro{max-width:600px;color:var(--muted);margin:15px 0 0;font-size:1.03rem;line-height:1.7}.difficulty-control{min-width:305px}.control-label{color:var(--muted);margin-bottom:9px;font-size:.78rem;font-weight:700;display:block}.segmented{border:1px solid var(--line);background:#ffffff85;border-radius:8px;padding:4px;display:flex}.segmented button{cursor:pointer;color:var(--muted);background:0 0;border:0;border-radius:5px;flex:1;padding:9px 13px;font-weight:700}.segmented button:hover{color:var(--ink)}.segmented button.active{color:#fff;background:var(--ink);box-shadow:0 2px 5px #20201e2e}.game-layout{grid-template-columns:220px minmax(0,1fr);align-items:start;gap:42px;display:grid}.stats-panel{border:1px solid var(--line);background:#fffdf8b8;border-radius:8px;padding:20px;position:sticky;top:20px;box-shadow:0 12px 30px #3d33260d}.progress-heading{color:var(--muted);justify-content:space-between;gap:8px;margin-bottom:10px;font-size:.78rem;display:flex}.progress-heading strong{color:var(--teal)}.progress-track{background:#ded8cd;border-radius:4px;height:6px;overflow:hidden}.progress-track span{background:var(--teal);height:100%;transition:width .3s;display:block}.stats{border-block:1px solid var(--line);margin:22px 0;display:grid}.stat{border-bottom:1px solid var(--line);grid-template-columns:24px 1fr auto;align-items:center;gap:7px;min-height:56px;display:grid}.stat:last-child{border-bottom:0}.stat svg{color:var(--accent)}.stat span{color:var(--muted);font-size:.82rem}.stat strong{font-size:.95rem}.restart-button{border:1px solid var(--ink);background:0 0;width:100%;padding:10px}.restart-button:hover{color:#fff;background:var(--ink)}.board-wrap{min-width:0}.start-button{border:1px solid var(--ink);color:#fff;background:var(--ink);cursor:pointer;border-radius:6px;justify-content:center;align-items:center;gap:8px;width:min(100%,260px);margin:0 auto 18px;padding:11px 18px;font-weight:800;display:flex}.start-button:hover{border-color:var(--accent-dark);background:var(--accent-dark)}.preview-countdown{border:1px solid var(--line);width:fit-content;min-height:42px;color:var(--muted);background:#fffdf8e6;border-radius:999px;justify-content:center;align-items:center;gap:9px;margin:0 auto 18px;padding:7px 14px;font-size:.82rem;font-weight:700;display:flex;box-shadow:0 5px 14px #3d332614}.preview-countdown strong{min-width:1.5ch;color:var(--accent-dark);text-align:center;font-size:1.25rem;line-height:1}.game-grid{gap:12px;width:min(100%,760px);margin-inline:auto;display:grid}.grid-easy{grid-template-columns:repeat(4,1fr);max-width:630px}.grid-medium,.grid-hard{grid-template-columns:repeat(4,1fr)}.memory-card{aspect-ratio:4/3;perspective:800px;cursor:pointer;background:0 0;border:0;border-radius:8px;min-width:0;padding:0}.memory-card:disabled{cursor:default;opacity:1}.card-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .46s cubic-bezier(.2,.7,.2,1);display:block;position:relative}.memory-card.is-visible .card-inner{transform:rotateY(180deg)}[dir=rtl] .memory-card.is-visible .card-inner{transform:rotateY(-180deg)}.card-front,.card-back{backface-visibility:hidden;border-radius:8px;place-items:center;display:grid;position:absolute;inset:0}.card-front{color:#ffffff9e;background-color:#252523;background-image:linear-gradient(135deg,#ffffff0b 25%,#0000 25%),linear-gradient(315deg,#ffffff0b 25%,#0000 25%);background-size:18px 18px;border:1px solid #2a2926;overflow:hidden;box-shadow:0 5px #11110f,0 10px 18px #20201e24}.memory-card:hover .card-front{transform:translateY(-2px);box-shadow:0 7px #11110f,0 13px 22px #20201e2e}.mini-star{border:1px solid #ffffff40;border-radius:50%;place-items:center;width:38px;height:38px;font-size:1.25rem;display:grid}.card-back{border:2px solid var(--ink);background:var(--paper);transform:rotateY(180deg);box-shadow:0 5px #c8bda9,0 10px 18px #20201e1f}.card-back>span{color:var(--accent);font-size:clamp(1.8rem,5vw,3.15rem);line-height:1}.memory-card:nth-child(3n+2) .card-back>span{color:var(--teal)}.memory-card:nth-child(3n) .card-back>span{color:#bd7c0d}.memory-card.is-matched .card-back{border-color:var(--teal);background:#edf8f2;animation:.35s matched-pop}.match-check{color:#fff;background:var(--teal);border-radius:50%;padding:3px;position:absolute;inset-block-start:8px;inset-inline-end:8px}.keyboard-hint{color:var(--muted);justify-content:center;align-items:center;gap:8px;margin:24px 0 0;font-size:.78rem;display:flex}.keyboard-hint span{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-bottom-width:2px;border-radius:4px;padding:2px 7px}.game-footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:16px;margin-top:46px;padding-top:18px;font-size:.78rem;display:flex}.game-footer nav{flex-wrap:wrap;gap:16px;display:flex}.game-footer a{color:var(--ink);text-underline-offset:3px;font-weight:700}.game-footer a:hover{color:var(--accent-dark)}.dialog-backdrop{z-index:10;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#181714a8;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.success-dialog{text-align:center;background:var(--paper);border:1px solid #d8cdbd;border-radius:8px;width:min(440px,100%);padding:34px;animation:.28s dialog-in;box-shadow:0 24px 70px #0000004d}.success-dialog .eyebrow{justify-content:center;margin-top:18px}.trophy-mark{color:#553b04;background:#f2c867;border-radius:50%;place-items:center;width:64px;height:64px;margin:auto;display:grid}.success-dialog h2{margin:4px 0 8px;font-size:1.65rem}.success-dialog>p:not(.eyebrow){color:var(--muted);margin:0 auto;line-height:1.6}.final-score{color:var(--teal);margin:16px 0 10px;font-size:2.8rem;line-height:1;display:block}.result-meta{color:var(--muted);justify-content:center;gap:24px;margin-bottom:22px;font-size:.85rem;display:flex}.result-meta b{color:var(--ink)}.play-again{border:1px solid var(--ink);color:#fff;background:var(--ink);width:100%;padding:12px 18px}.play-again:hover{background:var(--accent-dark);border-color:var(--accent-dark)}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes matched-pop{50%{transform:rotateY(180deg)scale(1.04)}}@keyframes dialog-in{0%{opacity:0;transform:translateY(12px)scale(.97)}}@media (width<=800px){.app-shell{width:min(100% - 28px,680px)}.hero{flex-direction:column;align-items:stretch;gap:24px;padding:34px 0 26px}.difficulty-control{min-width:0}.game-layout{grid-template-columns:1fr;gap:22px}.stats-panel{grid-template-columns:1fr auto;align-items:center;gap:16px 22px;padding:15px;display:grid;position:static}.progress-block{grid-column:1/-1}.stats{border:0;grid-template-columns:repeat(3,1fr);margin:0}.stat{border-bottom:0;border-inline-end:1px solid var(--line);grid-template-rows:auto auto;grid-template-columns:20px 1fr;min-width:90px;min-height:48px;padding-inline:10px}.stat:last-child{border-inline-end:0}.stat svg{grid-row:1/3}.stat strong{font-size:.88rem}.restart-button{white-space:nowrap;width:auto}}@media (width<=520px){.app-shell{width:min(100% - 20px,480px);padding-bottom:25px}.topbar{min-height:66px}.brand-mark{width:34px;height:34px}.language-button{padding:8px 10px}h1{font-size:2.35rem}.hero{padding-top:28px}.stats-panel{display:block}.stats{margin:14px 0}.stat{text-align:center;flex-direction:column;justify-content:center;gap:3px;padding:7px 4px;display:flex}.stat svg{width:17px;height:17px}.stat span{font-size:.7rem}.game-grid{gap:8px}.memory-card{aspect-ratio:3/4}.card-front{box-shadow:0 3px #11110f,0 7px 12px #20201e1f}.mini-star{width:30px;height:30px;font-size:.95rem}.keyboard-hint{text-align:center;line-height:1.5}.game-footer{flex-direction:column;align-items:flex-start;margin-top:32px}.preview-countdown{margin-bottom:14px}.success-dialog{padding:28px 22px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}