:root{color-scheme:dark;--bg:#182e31;--ink:#f1e8d5;--muted:#b8c7be;--gold:#d9bb79;--border:#9e885a}
[hidden]{display:none!important}
/* Visible faces swap at the narrow midpoint; transforms are animated by app.js. */
.card.matched{animation:pair-confirm 200ms ease-out}
.card.is-mismatch{animation:pair-mismatch 180ms ease-out}
.board.is-complete{animation:board-complete 320ms ease-out}
dialog[open] .clear-word{animation:board-complete 320ms ease-out}
@keyframes pair-confirm{0%,100%{transform:scale(1)}45%{transform:scale(1.05);filter:brightness(1.08)}}
@keyframes pair-mismatch{0%,100%{transform:translateX(0)}25%{transform:translateX(-2px)}65%{transform:translateX(2px)}}
@keyframes board-complete{0%,100%{filter:brightness(1)}45%{filter:brightness(1.12)}}
@media(prefers-reduced-motion:reduce){.card.matched,.card.is-mismatch,.board.is-complete,dialog[open] .clear-word{animation:none}}
*{box-sizing:border-box}body{margin:0;min-height:100svh;background:radial-gradient(ellipse at 50% 12%,#304b48,transparent 65%),var(--bg);color:var(--ink);font-family:"Yu Gothic UI","Hiragino Kaku Gothic ProN",sans-serif}button{font:inherit;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:focus-visible{outline:3px solid #f8db92;outline-offset:4px}.game-shell{max-width:460px;margin:auto;padding:28px 22px 16px}header{text-align:center;margin-bottom:22px}h1{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:32px;letter-spacing:.16em;margin:0 0 9px;font-weight:500}header p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}.stats{display:flex;justify-content:space-around;border-top:1px solid #b6a27055;border-bottom:1px solid #b6a27055;padding:12px 0;margin:0 0 20px}.stats div{text-align:center;flex:1}.stats div+div{border-left:1px solid #b6a27033}dt{font-size:11px;color:var(--muted);margin-bottom:5px}dd{font-size:24px;font-variant-numeric:tabular-nums;margin:0}dd span{font-size:12px;color:var(--muted)}.board{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.card{position:relative;aspect-ratio:4/5;padding:0;min-width:0;border:0;border-radius:8px;background:transparent;cursor:pointer}.card-inner{position:absolute;inset:0;transform:scaleX(1)}.card.face-up .card-back{visibility:hidden}.card.face-up .card-front{visibility:visible}.card-face{position:absolute;inset:0;border:1px solid var(--border);border-radius:8px;overflow:hidden;box-shadow:0 3px 8px #071c2255}.card-back{background:#263f42;display:grid;place-items:center}.card-back:before{content:"";position:absolute;inset:6px;border:1px solid #c5aa714d;border-radius:3px}.card-back svg{width:65%;color:#c1a86f}.card-front{visibility:hidden;background:#ede5d4;display:grid;place-items:center}.card-front svg{width:100%;height:100%}.card.matched .card-face{border-color:#ddc88b;box-shadow:0 0 0 1px #ddc88b55}.card:disabled{cursor:default}.card:not(:disabled):hover .card-back{background:#345052}.status{text-align:center;font-size:12px;color:var(--muted);min-height:20px;margin:16px 0 12px}.restart{display:block;width:100%;border:1px solid #bba57277;background:#e4d3ad;color:#253b38;min-height:46px;border-radius:6px;cursor:pointer;font-weight:600;font-size:14px}.restart:hover{background:#f2e0b8}.restart span{float:right;margin-right:14px;font-size:20px;line-height:20px}footer{text-align:center;font-size:11px;color:var(--muted);line-height:1.7;margin-top:18px}footer small{display:block;font-size:10px;opacity:.8;margin-top:10px}dialog{color:var(--ink);background:#203a3b;border:1px solid var(--gold);border-radius:12px;width:min(390px,calc(100% - 32px));max-height:calc(100svh - 32px);padding:24px;box-shadow:0 24px 80px #0007}dialog::backdrop{background:#091e27c9;backdrop-filter:blur(5px)}.clear-content{text-align:center}.clear-word{font-size:14px;letter-spacing:.32em;color:var(--gold);margin:0 0 10px}h2{font-family:"Yu Mincho",serif;font-size:19px;font-weight:500;margin:0 0 12px}#clear-stats{color:var(--muted);font-size:13px}.reward{width:min(200px,65%);margin:20px auto 0;aspect-ratio:1}.reward img{display:block;width:100%;height:100%;object-fit:contain;border-radius:8px}.reward-caption{font-size:12px;color:var(--muted);margin-bottom:20px}.text-button{border:0;background:none;color:var(--muted);padding:12px;font-size:12px;cursor:pointer}@media(max-width:360px){.game-shell{padding:20px 14px 12px}.board{gap:7px}h1{font-size:28px}header{margin-bottom:16px}.stats{margin-bottom:16px}}@media(max-height:700px){.game-shell{padding-top:16px}header{margin-bottom:14px}.stats{margin-bottom:14px;padding:9px 0}.status{margin:10px 0}footer{margin-top:10px}}@media(prefers-reduced-motion:reduce){.card-inner{transition:none}dialog::backdrop{backdrop-filter:none}}