:root{color-scheme:light;--bg: #fff;--soft: #fbf6ee;--fg: #2e2620;--muted: #6b5f55;--line: #efe4d4;--accent: #a65c0b;--accent-dk: #7a4308;--brand: #b5660f;--jade: #1f7a5a;--gold: #d9a441;--mint: #fdf3e4;--peach: #fdf0ea;--sky: #ecf4fb;--butter: #fdf7e3;--flip: .38s}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--fg)}body{font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Noto Sans TC,PingFang TC,sans-serif;-webkit-tap-highlight-color:transparent}a{color:var(--accent)}button{font:inherit;color:inherit}.logo{width:32px;height:32px;flex:none}.btn{display:inline-block;padding:11px 24px;border-radius:14px;border:2px solid var(--accent);background:var(--accent);color:#fff;font-weight:700;font-size:17px;cursor:pointer;box-shadow:0 4px 0 var(--accent-dk);transition:transform .1s,box-shadow .1s}.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--accent-dk)}.btn.ghost{background:#fff;color:var(--accent);box-shadow:0 4px 0 var(--line)}.btn.link{background:none;border-color:transparent;color:var(--muted);box-shadow:none;font-weight:600}.btn:focus-visible,.tile:focus-visible,.l-size:focus-visible,.g-btn:focus-visible{outline:3px solid var(--gold);outline-offset:2px}.lobby{max-width:960px;margin:0 auto;padding:0 16px 40px}.l-head{display:flex;align-items:center;gap:16px;padding:12px 0}.l-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--accent);text-decoration:none;margin-right:auto}.l-links{display:flex;gap:16px}.l-links a{color:var(--fg);text-decoration:none;font-weight:600}.l-main{display:grid;gap:16px}.l-card{position:relative;border-radius:20px;padding:20px;background:var(--mint);overflow:hidden;box-shadow:0 2px 10px #50320a0f}.l-card h1,.l-card h2{margin:0 0 6px;color:var(--accent);font-size:24px;line-height:1.3}.l-card p{margin:0 0 14px;color:var(--muted);max-width:32em}.l-daily{padding-right:150px}.l-daily img{position:absolute;right:8px;bottom:0;width:136px;height:auto;mix-blend-mode:multiply}.l-done{color:var(--fg)!important;font-weight:700}.l-free{background:#fff;border:1px solid var(--line)}.l-sizes{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.l-size{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:14px;text-align:left;border-radius:16px;border:1px solid var(--line);background:var(--soft);cursor:pointer;transition:border-color .15s,transform .15s}.l-size:hover{border-color:var(--accent);transform:translateY(-2px)}.l-size strong{font-size:18px}.l-size em{font-style:normal;color:var(--accent);font-size:14px;margin-left:2px}.l-size span{color:var(--muted);font-size:14px}.l-size .l-best{color:var(--fg);font-size:13px}.mini{display:grid;grid-template-columns:repeat(var(--c),9px);gap:2px;margin-bottom:6px}.mini i{width:9px;height:12px;border-radius:2px;background:var(--jade)}.l-learn{background:var(--sky);padding-right:130px}.l-learn img{position:absolute;right:8px;bottom:0;width:110px;height:auto;mix-blend-mode:multiply}.l-learn p{margin:8px 0 0}.l-played{text-align:center;color:var(--muted);margin:4px 0 0}.switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer}.switch input{position:absolute;opacity:0;width:1px;height:1px}.switch .track{width:46px;height:26px;border-radius:13px;background:#d9cfc2;position:relative;transition:background .2s;flex:none}.switch .thumb{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #00000040;transition:left .2s}.switch input:checked+.track{background:var(--accent)}.switch input:checked+.track .thumb{left:23px}.switch input:focus-visible+.track{outline:3px solid var(--gold);outline-offset:2px}.switch.small{font-size:14px;color:var(--muted)}.game{display:flex;flex-direction:column;align-items:center;min-height:100dvh;padding:8px 12px calc(12px + env(safe-area-inset-bottom))}.g-head{display:flex;align-items:center;gap:8px;width:100%;max-width:760px}.g-mode{flex:1;margin:0;text-align:center;font-weight:700;color:var(--accent);font-size:15px}.g-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;font-size:14px;cursor:pointer;white-space:nowrap}.g-stats{display:flex;gap:8px;margin:8px 0;width:100%;max-width:420px}.g-stats div{flex:1;text-align:center;background:var(--soft);border-radius:12px;padding:4px 6px}.g-stats dt{font-size:12px;color:var(--muted)}.g-stats dd{margin:0;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}.g-board{--gap: clamp(4px, 1.2vw, 10px);display:grid;gap:var(--gap);grid-template-columns:repeat(var(--cols),1fr);width:min(100%,760px,calc((100dvh - 210px) * var(--cols) * .75 / var(--rows)));padding:var(--gap);border-radius:18px;background:#f3e7d3;box-shadow:inset 0 2px 6px #5a3c141f}.tile{aspect-ratio:3 / 4;padding:0;border:0;background:none;cursor:pointer;perspective:600px;touch-action:manipulation}.tile .inner{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;transition:transform var(--flip) cubic-bezier(.3,.7,.3,1)}.tile.up .inner{transform:rotateY(180deg)}.face{position:absolute;inset:0;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:9%;box-shadow:0 2px #3c280a40,0 3px 6px #3c280a26;user-select:none}.face.front{transform:rotateY(180deg)}.tile:not(.up):hover .back{filter:brightness(1.08)}.tile.matched{cursor:default}.tile.matched .front{box-shadow:0 0 0 3px var(--gold),0 3px 6px #3c280a26;animation:pop .35s ease-out var(--flip)}.tile.miss .front{box-shadow:0 0 0 3px #d98a8a,0 3px 6px #3c280a26}@keyframes pop{50%{transform:rotateY(180deg) scale(1.08)}}.g-foot{display:flex;flex-direction:column;align-items:center;gap:4px;margin-top:10px;min-height:84px}.g-status{margin:0;min-height:1.6em;font-weight:700;color:var(--accent)}.g-learn{margin:0;padding:4px 14px;border-radius:999px;background:var(--sky);font-weight:700;font-size:15px}.win{border:0;border-radius:22px;padding:24px 22px 18px;max-width:min(92vw,420px);text-align:center;box-shadow:0 20px 60px #2819054d}.win::backdrop{background:#2e262073}.win img{width:96px;height:auto;mix-blend-mode:multiply}.win h2{margin:4px 0;color:var(--accent);font-size:26px}.w-score{margin:0;font-size:22px;font-weight:800}.w-turns,.w-note{margin:4px 0;color:var(--muted);font-size:14px}.w-best{margin:6px 0;display:inline-block;padding:2px 12px;border-radius:999px;background:var(--butter);color:var(--accent-dk);font-weight:800}.w-share{white-space:pre-wrap;word-break:break-all;font-size:14px;line-height:1.3;margin:10px auto;max-width:15em;font-family:inherit}.w-btns{display:flex;flex-direction:column;gap:10px;margin-top:8px}@media(max-width:720px){.l-sizes{grid-template-columns:repeat(2,1fr)}}@media(max-width:480px){.l-daily{padding-right:20px;padding-bottom:120px}.l-daily img{width:112px}.l-learn{padding-right:20px;padding-bottom:100px}.l-learn img{width:90px}.l-links a:first-child{display:none}.g-stats dd{font-size:19px}}@media(prefers-reduced-motion:reduce){:root{--flip: 0ms}.tile .inner,.btn,.l-size,.switch .track,.switch .thumb{transition:none}.tile.matched .front{animation:none}}