:root{color-scheme:dark;--bg:#0c100e;--panel:#141a16;--line:#2b342d;--green:#c5fa73;--muted:#a3afa4;--text:#edf3e9;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:14px}button,input,select{font:inherit}button,select{cursor:pointer}button{transition:background .15s,transform .15s}button:active{transform:translateY(1px)}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,canvas:focus-visible{outline:2px solid var(--green);outline-offset:4px}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.shell{max-width:1180px;margin:auto;padding:0 36px}.topbar{height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:20px}.brand{font-size:25px;font-weight:900;letter-spacing:1.5px;display:flex;align-items:center;gap:10px}.brand-mark{display:grid;place-items:center;width:30px;height:32px;transform:rotate(-8deg);border:2px solid var(--green);color:var(--green);border-radius:7px;font-size:22px}.brand-dot{color:var(--green);margin-left:-10px}.edition{font:10px/1.7 ui-monospace,monospace;letter-spacing:1.5px;color:var(--muted);margin-left:12px}.edition span{color:#737f76}.status-pill{margin-left:auto;padding:7px 11px;border:1px solid #344a2e;border-radius:30px;font-size:11px;color:#c3d7b7;max-width:200px}.status-pill:before{content:'●';font-size:8px;margin-right:7px;color:var(--green)}.intro{display:flex;justify-content:space-between;align-items:center;padding:42px 0 31px}.eyebrow,.section-kicker{font:10px/1.5 ui-monospace,monospace;letter-spacing:1.8px;color:var(--muted)}.eyebrow{color:var(--green);margin:0 0 13px}h1{font-size:clamp(36px,5vw,56px);font-weight:800;letter-spacing:-2px;line-height:1.15;margin:0 0 13px}h1 span{color:var(--green)}.intro-copy{margin:0;color:var(--muted);font-size:13px;letter-spacing:.5px}.intro-note{display:flex;gap:15px;align-items:center;font-size:11px;line-height:1.9;color:var(--muted)}.intro-note strong{font-weight:500;color:var(--text)}.mini-grid{font-size:52px;color:#617a50}.layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:24px;align-items:start}.game-panel{border:1px solid var(--line);border-radius:18px;padding:22px;background:linear-gradient(145deg,#182019,var(--panel));overflow:hidden}.stats{display:flex;gap:46px;align-items:center;padding:0 1px 19px}.stats>div{display:flex;flex-direction:column;gap:6px}.label{font-size:10px;letter-spacing:1px;color:var(--muted)}.stats strong{font:500 34px/1.05 ui-monospace,monospace;letter-spacing:-1px}.stats>div:first-child strong{color:var(--green)}.stats .level-stat{margin-left:auto;align-items:flex-end}.level{font-size:12px;border:1px solid #445539;border-radius:6px;padding:5px 9px;color:var(--green)}.board-frame{position:relative;border:1px solid #36482f;border-radius:10px;overflow:hidden;background:#0a110c;isolation:isolate}.board-frame canvas{width:100%;height:auto;aspect-ratio:1;display:block;touch-action:none}.board-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:rgba(8,15,10,.78);backdrop-filter:blur(2px);padding:16px}.overlay-badge{font:9px ui-monospace,monospace;letter-spacing:2px;color:var(--green);border:1px solid #405332;border-radius:30px;padding:7px 11px}.board-overlay h2{font-size:32px;letter-spacing:-1px;margin:23px 0 0}.board-overlay p{line-height:1.9;color:#b1bfae;margin:14px 0 23px;font-size:12px}.primary{background:var(--green);border:0;border-radius:7px;color:#16200c;padding:14px 26px;min-height:48px;font-weight:700;box-shadow:0 0 35px #c5fa7312}.primary:hover{background:#d6ff9e}.primary span{margin-left:20px}.board-corner{position:absolute;bottom:9px;left:11px;color:#74826d;font:8px ui-monospace,monospace;letter-spacing:1px;pointer-events:none}.game-toolbar{display:flex;gap:10px;justify-content:space-between;align-items:center;margin-top:10px;font-size:10px;color:var(--muted)}.game-toolbar>div{display:flex;gap:4px}.quiet{border:0;color:#c5cfbf;background:transparent;min-height:44px;padding:7px 9px;font-size:11px}.quiet:hover{background:#253221;border-radius:6px}.setup-row{border-top:1px solid var(--line);padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted)}select{background:#111812;color:var(--text);border:1px solid #354231;border-radius:6px;min-height:42px;padding:0 12px;max-width:65%}.sidebar{display:flex;flex-direction:column;gap:18px}.identity-card,.leaderboard-card,.how-card{border:1px solid var(--line);border-radius:14px;padding:22px;background:var(--panel)}.section-kicker{font-size:9px;letter-spacing:1.2px;margin-bottom:12px}.identity-card label{display:block;font-size:17px;font-weight:600;margin-bottom:17px}.input-wrap{display:flex;align-items:center;background:#0e140f;border:1px solid #354032;border-radius:7px;padding:0 13px;gap:10px}.input-wrap span{font-size:24px;color:var(--green)}input{width:100%;min-width:0;background:transparent;border:0;min-height:45px;color:var(--text);font-size:12px}input::placeholder{color:#82917e}.identity-card p,.how-card p{font-size:10px;color:var(--muted);line-height:1.8;margin:10px 0 0}.leaderboard-heading{display:flex;align-items:center;justify-content:space-between}.leaderboard-heading .section-kicker{margin-bottom:8px}.leaderboard-heading h2{margin:0;font-size:19px;font-weight:650}.leaderboard-heading h2 span{font:9px ui-monospace,monospace;color:var(--muted);margin-left:8px}.icon-button{width:44px;height:44px;border-radius:8px;background:transparent;border:1px solid #354132;color:var(--green);font-size:23px}.tabs{display:flex;background:#0d140e;border:1px solid #273423;border-radius:7px;padding:4px;gap:3px;margin:23px 0 19px}.tabs button{flex:1;border:0;background:transparent;border-radius:4px;min-height:44px;color:var(--muted);font-size:11px}.tabs button[aria-pressed=true]{background:#293923;color:var(--green)}.rank-labels{display:flex;justify-content:space-between;font-size:9px;letter-spacing:.6px;color:#90a088;border-bottom:1px solid var(--line);padding:0 1px 10px}.ranking{list-style:none;margin:0;padding:0;max-height:300px;overflow:auto}.ranking li{display:flex;align-items:center;gap:10px;padding:13px 1px;border-bottom:1px solid #253022;font-size:12px}.ranking .place{font:12px ui-monospace,monospace;color:var(--muted);width:22px;flex-shrink:0}.ranking li:nth-child(-n+3) .place{color:var(--green)}.ranking .player{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ranking .points{margin-left:auto;color:var(--green);font:13px ui-monospace,monospace}.ranking .me{color:var(--green);font-size:9px;white-space:nowrap}.rank-empty{text-align:center;padding:23px 9px 18px}.empty-icon{font-size:32px;display:block;color:#779561;margin-bottom:9px}.rank-empty strong{font-size:12px;font-weight:500}.rank-empty p{font-size:11px;line-height:1.8;color:var(--muted);margin:8px 0 0}.sync-message{font-size:10px;line-height:1.8;color:#bac7b1;border-top:1px dashed #35432f;padding-top:12px;margin:6px 0 0;overflow-wrap:anywhere}.rank-footnote{font-size:9px;color:#92a089;line-height:1.8;margin:10px 0 0}.retry{margin-top:10px;border:1px solid #50663d;background:#24311d;color:var(--green);border-radius:5px;min-height:44px;width:100%;font-size:11px}.how-card{background:transparent;border-style:dashed}.key-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:10px 0;font-size:10px;color:var(--muted)}kbd{font:10px ui-monospace,monospace;display:inline-grid;place-items:center;min-width:22px;height:24px;border:1px solid #3b4637;border-bottom-width:3px;border-radius:4px;background:#1a2319;color:#d8e4cc;margin-right:3px}.space-key{padding:0 12px}footer{display:flex;justify-content:space-between;gap:16px;padding:28px 0 32px;font-size:10px;color:#91a087}footer>span:last-child{font:9px ui-monospace,monospace;letter-spacing:1px}footer b{color:var(--green);margin-left:8px;font-size:7px}.mobile-controls{display:none}.storage-note{font-size:11px;color:#f0d197;line-height:1.6}.game-panel:has(canvas:focus-visible){border-color:var(--green)}@media(max-width:760px){.shell{padding:0 18px}.topbar{height:74px}.edition{display:none}.brand{font-size:21px}.intro{padding:30px 0 24px}.intro-note{display:none}.eyebrow{font-size:9px}.layout{grid-template-columns:1fr;gap:20px}.game-panel{padding:15px}.stats{gap:34px}.stats strong{font-size:30px}.sidebar{gap:14px}.mobile-controls{display:grid;grid-template-columns:repeat(3,52px);grid-template-rows:48px 48px auto;gap:7px;justify-content:center;margin-top:18px}.mobile-controls button{border:1px solid #46573b;border-radius:8px;background:#25331f;color:var(--green);font-size:24px;touch-action:manipulation;min-height:48px}.up{grid-column:2}.left{grid-column:1}.down{grid-column:2}.right{grid-column:3}.mobile-controls span{grid-column:1/4;text-align:center;font-size:10px;color:var(--muted);padding-top:4px}.board-overlay h2{font-size:27px}.board-overlay p{margin:10px 0 17px}.how-card{display:none}footer{font-size:9px}.status-pill{font-size:10px}.game-toolbar{font-size:9px}}@media(prefers-reduced-motion:reduce){button{transition:none}}@media(pointer:coarse) and (min-width:761px){.mobile-controls{display:grid;grid-template-columns:repeat(3,52px);gap:8px;justify-content:center;margin-top:16px}.mobile-controls button{min-height:48px;background:#25331f;color:var(--green);border:1px solid #46573b;border-radius:8px;font-size:23px}.mobile-controls span{grid-column:1/4;text-align:center;color:var(--muted);font-size:10px}}

/* Direction positions shared by phone and coarse-pointer tablet layouts. */
.mobile-controls .up{grid-column:2;grid-row:1}.mobile-controls .left{grid-column:1;grid-row:2}.mobile-controls .down{grid-column:2;grid-row:2}.mobile-controls .right{grid-column:3;grid-row:2}.mobile-controls>span{grid-row:3}