:root{color-scheme:dark;--bg:#090e19;--panel:#111a29;--line:#263249;--text:#edf3ff;--muted:#8492ac;--cyan:#69f0df;--purple:#a78bfa;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 48% 20%,#15243a70,transparent 55%),var(--bg);color:var(--text);min-width:280px}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.16;background-image:linear-gradient(#5d7c9e22 1px,transparent 1px),linear-gradient(90deg,#5d7c9e22 1px,transparent 1px);background-size:64px 64px}button,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:9px;background:#172236;color:var(--text);transition:background .15s,transform .1s,border-color .15s;min-height:44px}button:hover:enabled{border-color:#69f0df80;background:#1b3042}button:active:enabled,button.pressed{transform:translateY(2px);background:#29475a}button:disabled{cursor:default;opacity:.4}:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}.app{position:relative;max-width:1120px;margin:auto;padding:30px 40px 18px}.topbar{display:flex;align-items:center;justify-content:space-between;padding-bottom:24px;border-bottom:1px solid #26324980}.brand{display:flex;gap:11px;align-items:center;color:var(--text);text-decoration:none;font-size:18px;font-weight:800;letter-spacing:2px}.brand-icon{display:grid;place-items:center;width:36px;height:36px;border:1px solid #69f0df60;border-radius:9px;color:var(--cyan);font-size:30px;background:#69f0df0c}.brand-light{font-weight:400;color:var(--muted)}.brand small{display:block;font-size:9px;letter-spacing:4px;color:var(--muted);margin-top:4px}.edition{color:var(--muted);font-size:10px;letter-spacing:2px}.edition i,.board-heading i{display:inline-block;width:6px;height:6px;background:var(--cyan);border-radius:50%;margin-right:8px;box-shadow:0 0 10px #69f0df60}.intro{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:34px 0 28px}.eyebrow{font-size:10px;letter-spacing:3px;color:var(--cyan);font-weight:700;margin:0 0 12px}h1{font-size:28px;font-weight:600;letter-spacing:1px;margin:0 0 12px}h1>span{color:var(--cyan)}.subtitle{color:var(--muted);font-size:12px;margin:0;line-height:1.8}.player-tag{display:flex;gap:10px;align-items:center;min-width:0;max-width:220px}.avatar{color:var(--purple);display:grid;place-items:center;background:#a78bfa12;border:1px solid #a78bfa30;border-radius:50%;width:36px;height:36px;flex-shrink:0}.player-tag>div{min-width:0}.player-tag small{display:block;color:var(--muted);font-size:10px;margin-bottom:6px}.player-tag strong{display:block;font-size:13px;overflow-wrap:anywhere}.game-layout{display:grid;grid-template-columns:218px minmax(0,320px) 218px;gap:28px;justify-content:center;align-items:start}.panel{border:1px solid var(--line);border-radius:12px;background:linear-gradient(135deg,#152033dd,#101824dd);padding:20px}.label{font-size:10px;letter-spacing:2px;color:#b4c1d7;margin:0}.label span{float:right;letter-spacing:0;font-size:10px;color:var(--muted)}.score{display:block;color:var(--cyan);font:500 36px/1.3 Consolas,monospace;letter-spacing:2px;margin-top:17px;text-shadow:0 0 24px #69f0df18}.divider{height:1px;background:var(--line);margin:22px 0 18px}.stat-row{display:flex;justify-content:space-between;align-items:center;margin-top:20px}.stat-row>span{font-size:10px;letter-spacing:2px;color:#b4c1d7}.stat-row small{display:block;font-size:10px;letter-spacing:0;margin-top:4px;color:var(--muted)}.stat-row strong{font:24px Consolas,monospace}.record-panel{margin-top:16px}.record-panel strong{display:block;font:25px Consolas,monospace;color:var(--purple);margin:12px 0 6px}.record-panel>small{color:var(--muted);font-size:10px}.flow-note{display:flex;gap:10px;padding:22px 10px;color:#62728d;font-size:12px;line-height:1.9}.flow-note>span{color:var(--cyan);padding-top:12px}.play-column{min-width:0}.board-heading{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);letter-spacing:1px;margin:0 2px 10px}.board-wrap{position:relative;overflow:hidden;border:1px solid #40546c;border-radius:8px;padding:5px;background:#070d17;box-shadow:0 0 0 4px #17233766,0 18px 50px #0005}#board{display:block;width:100%;height:auto;aspect-ratio:1/2}.board-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;background:#070d17df;backdrop-filter:blur(4px);padding:20px;text-align:center}.board-overlay[hidden]{display:none}.overlay-symbol{font-size:40px;color:var(--cyan);width:76px;height:76px;display:grid;place-items:center;border:1px solid #69f0df30;border-radius:22px;background:#69f0df08;margin-bottom:12px}h2{font-size:22px;font-weight:600;margin:16px 0 8px}.board-overlay p{font-size:12px;color:var(--muted);line-height:1.8;margin:0 0 26px;white-space:pre-line}.primary{background:var(--cyan);border-color:var(--cyan);color:#082b2b;font-weight:700;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:25px}.primary:hover:enabled{background:#9bf9ec;border-color:#9bf9ec}.board-caption{display:flex;justify-content:space-between;gap:8px;margin:12px 0 0;font-size:9px;color:#6e819d}.board-caption span:last-child{color:var(--cyan)}.next-panel{text-align:left}#next{display:block;max-width:100%;height:auto;margin:8px auto}.next-foot{text-align:center;font-size:8px;letter-spacing:2px;color:#536582}.actions{display:grid;gap:9px;margin:16px 0}.actions button{display:flex;align-items:center;gap:12px;padding:12px 14px;font-size:12px}.actions button>span{font-size:18px;color:var(--cyan)}.actions kbd{margin-left:auto}kbd{font:10px Consolas,monospace;border:1px solid #354158;background:#0a1220;border-radius:4px;padding:3px 5px;color:#a8b7ce}.keys-panel{padding:18px}.keys-panel>div{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);margin-top:18px}.tip{font-size:10px;color:#6c7e9a;line-height:1.9;border-top:1px solid var(--line);padding-top:15px;margin:20px 0 0}.touch-controls{display:none}footer{display:flex;justify-content:space-between;margin-top:30px;padding-top:18px;border-top:1px solid #26324980;font-size:9px;color:#64748f;letter-spacing:1px}footer b{color:var(--cyan);margin:0 8px}dialog{max-width:min(450px,calc(100% - 32px));width:450px;padding:32px;border:1px solid #364b65;border-radius:18px;background:#111b2b;color:var(--text);box-shadow:0 30px 100px #0009}dialog::backdrop{background:#030712dc;backdrop-filter:blur(8px)}dialog p{font-size:12px;line-height:1.9;color:var(--muted)}.modal-icon{font-size:34px;color:var(--cyan);margin-bottom:20px}dialog .eyebrow{color:var(--cyan);font-size:10px}dialog label{display:block;font-size:12px;margin:22px 0 10px}input[type=text],input:not([type]){width:100%;padding:13px 14px;background:#090f1c;border:1px solid #35455d;border-radius:8px;color:var(--text)}.input-hint{display:block;font-size:10px;color:var(--muted);margin-top:8px}.notice{margin-top:22px;padding:13px;border:1px solid #e4b85e35;background:#e4b85e08;border-radius:8px}.notice strong{display:block;color:#e6c783;font-size:12px;margin-bottom:6px}.notice span{font-size:10px;line-height:1.8;color:#9b9b9f}.checkbox{display:flex;align-items:flex-start;gap:8px;line-height:1.7}.checkbox input{accent-color:var(--cyan);margin-top:3px}.checkbox span{font-size:11px;color:#b5c2d6}dialog .primary{width:100%}.error{color:#ff9cab;min-height:16px;margin:6px 0 12px}.dialog-actions{display:flex;gap:10px;margin-top:24px}.dialog-actions button{flex:1;font-size:12px;padding:12px}.dialog-actions .primary{width:auto;justify-content:center}
@media(min-width:1500px){.app{padding-top:40px}.intro{margin:40px 0}}
@media(max-width:900px){.app{padding:20px 24px}.game-layout{grid-template-columns:170px minmax(0,300px) 170px;gap:18px}.panel{padding:15px}.score{font-size:29px}h1{font-size:24px}.keys-panel{padding:14px}.keys-panel>div{font-size:10px}}
@media(max-width:700px){.app{max-width:520px;padding:18px 16px 16px}.topbar{padding-bottom:16px}.brand{font-size:15px}.edition{font-size:8px}.intro{margin:22px 0;display:block}h1{font-size:23px}.subtitle{font-size:11px}.player-tag{margin-top:16px;max-width:100%;gap:8px}.avatar{width:28px;height:28px}.player-tag>div{display:flex;gap:10px;align-items:center}.player-tag small{margin:0;font-size:9px}.player-tag strong{font-size:12px}.game-layout{grid-template-columns:minmax(0,1fr) 106px;gap:12px}.left-panel{grid-column:1/-1;display:flex;gap:10px}.score-panel{flex:1;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px;min-width:0}.score-panel .label{font-size:8px;letter-spacing:1px}.score-panel .label span,.divider,.stat-row small{display:none}.score{font-size:23px;margin:0;letter-spacing:0}.stat-row{display:block;margin:0;text-align:center}.stat-row>span{display:block;font-size:8px;letter-spacing:1px}.stat-row strong{display:block;font-size:20px;margin-top:4px}.record-panel{margin:0;padding:12px;width:106px;flex-shrink:0}.record-panel .label{font-size:7px;letter-spacing:.7px}.record-panel strong{font-size:18px;margin:5px 0 0}.record-panel>small{font-size:8px}.flow-note,.keys-panel{display:none}.play-column{grid-column:1;grid-row:2}.right-panel{grid-column:2;grid-row:2}.next-panel{padding:12px 8px}.next-panel .label{font-size:8px;letter-spacing:1px}.next-panel .label span{float:none;display:block;margin-top:6px;font-size:9px}.next-foot{font-size:6px;letter-spacing:.5px}.actions button{padding:10px 8px;gap:7px;font-size:10px}.actions kbd{display:none}.actions button>span{font-size:15px}.board-caption{font-size:8px;flex-wrap:wrap}.board-overlay{padding:10px}.board-overlay h2{font-size:18px}.board-overlay p{font-size:10px;margin-bottom:18px}.overlay-symbol{width:52px;height:52px;font-size:28px}.board-overlay .primary{padding:11px;font-size:12px;gap:15px}.touch-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:18px 0 0;touch-action:none;user-select:none}.touch-controls button{font-size:24px;min-height:52px;padding:6px;touch-action:none}.touch-controls small{display:block;font-size:9px;color:#8fa4bf;margin-top:2px}.touch-controls .drop-button{color:var(--cyan);border-color:#69f0df55;background:#69f0df10}footer{font-size:8px;margin-top:20px;letter-spacing:0}dialog{padding:24px}}
@media(pointer:coarse) and (min-width:701px){.touch-controls{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;max-width:600px;margin:22px auto;touch-action:none}.touch-controls button{font-size:22px;touch-action:none}.touch-controls small{font-size:10px;display:block}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media(max-width:700px){.score-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.score-panel .label{display:none}.score-panel .score{grid-column:1/-1}.score-panel .stat-row{display:flex;justify-content:space-between;align-items:center;gap:4px}.score-panel .stat-row>span{font-size:7px}.score-panel .stat-row strong{font-size:18px;margin:0}.record-panel strong{margin-top:15px}}
#sound #sound-label{font-size:12px;color:var(--text)}#sound[aria-pressed=false]{color:var(--muted)}#sound[aria-pressed=false]>span:first-child{color:var(--muted)}@media(max-width:700px){#sound #sound-label{font-size:10px}}
.leaderboard-panel{margin-top:28px}.leaderboard-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.leaderboard-heading h2{font-size:20px;margin:0}.leaderboard-heading .eyebrow{font-size:9px;letter-spacing:2px}.leaderboard-heading button{font-size:11px;padding:8px 12px;flex-shrink:0}.leaderboard-message{font-size:11px;color:var(--muted);line-height:1.8;overflow-wrap:anywhere}.leaderboard-table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:12px}.leaderboard-table th,.leaderboard-table td{text-align:left;padding:12px 8px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.leaderboard-table th{color:var(--muted);font-size:10px;font-weight:400}.leaderboard-table th:first-child{width:17%}.leaderboard-table th:last-child,.leaderboard-table td:last-child{text-align:right;width:30%}.leaderboard-table td:first-child{color:var(--cyan);font-family:Consolas,monospace}.leaderboard-submit{display:flex;align-items:center;gap:16px;margin-top:18px}.leaderboard-submit button{font-size:12px;flex-shrink:0}.leaderboard-submit p{margin:0}@media(max-width:700px){.leaderboard-panel{padding:14px}.leaderboard-heading .eyebrow{font-size:7px;letter-spacing:.5px}.leaderboard-heading h2{font-size:18px}.leaderboard-submit{align-items:stretch;flex-direction:column;gap:10px}.leaderboard-submit button{justify-content:center}.leaderboard-table{font-size:11px}}