:root{color-scheme:dark;--bg:#15161e;--sidebar:#191a23;--panel:#1e1f2b;--line:#2d2e3d;--text:#eeeef4;--muted:#9293a7;--purple:#bca5ee;--mint:#b7dfca;--gold:#dec18a;--font:"Segoe UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif}
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p{color:#7e8194;font-size:9px;margin-top:3px}.filter-label{display:flex;align-items:center;gap:6px;border:1px solid #30313d;padding:5px 8px;border-radius:6px}.filter-label svg{width:12px;height:12px;color:#868497}.filter-label select{background:#15161e;border:0;color:#a4a1b6;font-size:10px;cursor:pointer;padding:1px 3px;max-width:100px}.level-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.level-card{position:relative;display:flex;flex-direction:column;text-align:left;min-height:177px;padding:18px 19px 15px;border:1px solid #30303e;background:linear-gradient(130deg,#21212d,#1d1e28);border-radius:11px;overflow:hidden;transition:transform .2s,border-color .2s,box-shadow .2s}.level-card:hover{transform:translateY(-3px);border-color:#6b5a83;box-shadow:0 9px 26px 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#a5c8ba24;border-radius:12px;background:#a5c8ba0c;color:var(--mint);font-family:Georgia,serif;font-size:22px}.level-card:nth-child(3n+2) .level-art{color:var(--purple);border-color:#bca5ee28;background:#bca5ee09}.level-card:nth-child(3n+3) .level-art{color:#e0c195;border-color:#e0c19526;background:#e0c19509}.level-card.locked .level-art{opacity:.48}.card-content h4{font-size:13px;font-weight:550;margin:0 0 5px;letter-spacing:.6px}.card-content p{color:#888499;font-size:9px;line-height:1.6}.level-card.locked h4{color:#9997aa}.level-card.locked .card-content p{color:#6d6d80}.card-bottom{margin-top:auto;padding-top:11px;border-top:1px solid #ffffff07;display:flex;align-items:center;justify-content:space-between;width:100%;gap:6px}.level-meta{display:flex;align-items:center;gap:10px;color:#807b90;font-size:9px;white-space:nowrap}.level-meta>span{display:flex;align-items:center;gap:4px}.level-meta svg{width:10px;height:10px}.difficulty{display:flex;gap:2px;align-items:flex-end;height:9px}.difficulty i{width:3px;background:#454252;border-radius:1px}.difficulty i:nth-child(1){height:4px}.difficulty i:nth-child(2){height:6px}.difficulty i:nth-child(3){height:8px}.difficulty i:nth-child(4){height:10px}.difficulty i:nth-child(5){height:12px}.difficulty i.lit{background:#ac9bc6}.card-go{color:#bba3df;font-size:9px;display:flex;gap:5px;align-items:center}.card-go svg{height:13px;width:13px}.level-card.locked .card-go{color:#646479}.stars-small{display:flex;gap:3px;color:var(--gold)}.stars-small svg{height:11px;width:11px;stroke-width:1.2}.stars-small .filled{fill:currentColor}.chapter-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px;color:#7d7b8e;font-size:9px}.chapter-bottom>span{display:flex;align-items:center;gap:7px}.chapter-bottom svg{width:13px;height:13px;color:#a39a80}.chapter-bottom button{font-size:10px;color:#ad9ac6}.chapter-bottom button span{margin-left:10px}.footer{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:8px;color:#5f6174;padding:29px 0 23px;border-top:1px solid #272833;margin-top:34px}.footer-brand{color:#92909f;letter-spacing:1px;font-size:11px}.footer-brand i{font-size:8px;font-style:normal;color:#66667b;margin-left:14px;letter-spacing:.5px}.empty-state{grid-column:1/-1;border:1px dashed #393448;border-radius:10px;padding:40px;text-align:center;color:#9791aa;font-size:12px}.empty-state button{display:block;color:var(--purple);margin:12px auto 0;text-decoration:underline}.toast{position:fixed;bottom:30px;left:calc(50% + 116px);transform:translate(-50%,20px);z-index:100;background:#35303f;color:#eee5fb;border:1px solid #665577;border-radius:9px;padding:12px 22px;font-size:12px;box-shadow:0 8px 40px #0005;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;max-width:90vw;text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}
/* A small, focused place to play. */
dialog{color:var(--text);border:1px solid #464052;background:#1b1c27;border-radius:18px;padding:0;box-shadow:0 35px 120px #0009}dialog::backdrop{background:#0c0c16c9;backdrop-filter:blur(9px)}.game-dialog{width:min(790px,calc(100% - 32px));max-height:calc(100dvh - 40px);overflow:auto}.game-top{display:flex;align-items:center;justify-content:space-between;padding:19px 25px}.text-button{color:#a39ab4;font-size:11px;display:flex;gap:9px;align-items:center}.text-button:hover{color:var(--text)}.game-counter{font-size:9px;letter-spacing:2px;color:#7e788f}.game-progress{display:flex;gap:5px;padding:0 25px}.game-progress span{height:3px;background:#33303e;flex:1;border-radius:3px}.game-progress span.done{background:var(--mint)}.game-progress span.active{background:var(--purple)}.game-body{padding:29px 48px 33px}.game-eyebrow{color:var(--purple);font-size:10px;letter-spacing:2px;text-align:center}.game-body h1{font-size:27px;letter-spacing:2px;text-align:center;margin:9px 0 12px;font-weight:550}.game-brief{color:#b0a9bd;font-size:12px;line-height:1.95;text-align:center;white-space:pre-line;max-width:570px;margin:0 auto}.puzzle-stage{margin:26px 0 23px;background:radial-gradient(ellipse at 50% 0,#2b2739,#20212d 75%);border:1px solid #383244;border-radius:12px;padding:25px 24px;min-height:130px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:18px}.sequence-row{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.sequence-item{width:60px;height:65px;background:#2b293a;border:1px solid #4b415d;border-radius:10px;display:grid;place-items:center;font:25px Georgia,serif;color:#ddd1ef}.sequence-item.unknown{border:1px dashed #b29bdb;color:#c4a8ed;background:#9c7bc818}.puzzle-text{white-space:pre-wrap;text-align:center;font-size:22px;line-height:1.8;letter-spacing:3px;color:#ddd2ee;overflow-wrap:anywhere;max-width:100%}.puzzle-stage[data-kind=logic] .puzzle-text,.puzzle-stage[data-kind=choice] .puzzle-text{font-size:15px;letter-spacing:.7px}.puzzle-lines{width:100%;display:grid;gap:8px}.puzzle-lines p{padding:10px 13px;border-radius:7px;border:1px solid #ffffff09;background:#ffffff03;font-size:12px;color:#bcb3cc;white-space:pre-wrap}.puzzle-legend{white-space:pre-wrap;font-size:10px;line-height:1.9;letter-spacing:.6px;text-align:center;color:#9d94b1;background:#17192266;border:1px solid #373140;border-radius:7px;padding:12px 16px;width:100%;overflow-wrap:anywhere}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.choice-button{display:flex;align-items:center;gap:12px;padding:13px 16px;border:1px solid #494055;background:#272331;border-radius:8px;color:#cec3df;text-align:left;font-size:14px;min-height:51px;transition:background .15s,transform .15s}.choice-button>span{width:22px;height:22px;display:grid;place-items:center;border:1px solid #63546f;border-radius:5px;color:#a08bbd;font-size:10px;flex-shrink:0}.choice-button:hover{background:#3a2e4b;border-color:#a48abf;transform:translateY(-1px)}.choice-button.wrong{border-color:#bd7a88;background:#6d35412d}.answer-form{display:flex;gap:10px;align-items:stretch}.answer-form input{min-width:0;flex:1;border:1px solid #4e425e;background:#24212f;border-radius:8px;color:#ede4fb;font-size:16px;padding:12px 15px;letter-spacing:2px;width:100%}.answer-form input::placeholder{font-size:11px;letter-spacing:.5px;color:#7b718d}.answer-form input:focus{outline:2px solid #bca5ee60;outline-offset:0;border-color:var(--purple)}.answer-form .primary-button{padding:12px 21px}.game-status{color:#a29baf;font-size:11px;min-height:26px;margin:11px 0;text-align:center;white-space:pre-line}.game-status.error{color:#e8a0ab}.game-status.success{color:var(--mint)}.hint-section{border-top:1px solid #34303e;padding-top:16px;margin-top:13px}.hint-actions{display:flex;align-items:center;justify-content:space-between;gap:10px}.hint-button{display:flex;align-items:center;gap:7px;color:#c3b184;font-size:11px;padding:4px 0}.hint-button svg{height:16px;width:16px}.hint-button:disabled{color:#6d6679}.score-note{font-size:9px;color:#827b91}.hint-list{display:grid;gap:8px;padding:0;margin:12px 0 0;list-style:none}.hint-list:empty{margin:0}.hint-list li{background:#c6af7d08;border:1px solid #c6af7d22;border-radius:7px;padding:10px 12px;color:#c5b795;font-size:11px;line-height:1.8}.hint-list b{color:#d2bd8e;margin-right:9px}.cipher-wheel{display:flex;align-items:center;justify-content:center;gap:15px;color:#aea0c4;font-size:10px}.cipher-wheel button{background:#393047;border:1px solid #665079;width:31px;height:31px;border-radius:50%;font-size:17px}.cipher-wheel output{color:#cbb4eb;font-size:19px;min-width:27px;text-align:center}.cipher-preview{font:16px/1.5 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