:root{color-scheme:dark;--bg:#141114;--panel:#211c20;--text:#f3ebdf;--muted:#b7a9ad;--red:#f35661;--border:#3c3037;--paper:#fbf6eb;--ink:#3d343b;--line:#bd243c;--dot:#655960}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 60% 20%,#2b1820 0,transparent 55%),var(--bg);font:15px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text)}button,a,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{border:1px solid var(--border);border-radius:8px;background:#2a2228;color:var(--text);padding:10px 14px;cursor:pointer;min-height:44px;transition:background .15s,border-color .15s}button:hover{background:#3c2b33;border-color:#91606b}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #ffad69;outline-offset:3px}a{color:inherit;text-decoration:none}a:hover{color:var(--red)}[hidden]{display:none!important}.mast{max-width:1440px;margin:auto;padding:22px 4%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);gap:16px}.brand{font-size:20px;font-weight:850;letter-spacing:1px;line-height:1.1}.brand em{color:var(--red)}.brand small{display:block;font-size:9px;font-weight:500;letter-spacing:4px;margin-top:6px}.mast nav{display:flex;gap:8px;align-items:center}.mast nav button{background:none;border-color:transparent;font-size:13px}.return{font-size:13px;margin-left:12px;padding:10px;border-left:1px solid var(--border)}.return span{color:var(--red)}main{max-width:1240px;margin:auto;padding:30px 34px}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.eyebrow{font-size:10px;letter-spacing:2.3px;font-weight:750;color:var(--red);margin:0 0 8px}h1{font-family:Georgia,serif;font-size:66px;line-height:1.08;font-weight:500;margin:0 0 8px;letter-spacing:-2px}h1 span{color:var(--red)}.tagline{color:var(--muted);margin:0}.intro-detail{display:flex;gap:16px;align-items:center;color:var(--muted);font-family:Georgia,serif;font-size:18px}.loop-icon{font-size:65px;color:var(--red)}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.board-card{background:var(--paper);border-radius:14px;overflow:hidden;color:var(--ink);box-shadow:0 20px 70px #0005}.board-header{display:flex;justify-content:space-between;gap:8px;align-items:center;padding:18px 22px;border-bottom:1px solid #ded4cb;font-size:12px}.board-header>div{display:flex;gap:12px;align-items:center}.pill{font-size:9px;font-weight:800;letter-spacing:1.2px;padding:4px 9px;border-radius:4px;background:#e8ded4;color:#6d4f50}.board-header button{min-height:36px;padding:4px 10px;background:#efe7dd;border-color:transparent;color:var(--ink);font-variant-numeric:tabular-nums}.tool-strip{display:flex;justify-content:center;gap:4px;padding:10px 8px 0}.tool-strip button{background:transparent;color:#79646c;border-color:transparent;font-size:12px;padding:8px 12px;min-height:42px}.tool-strip button[aria-pressed=true]{color:#9d1830;background:#ecd5d3;border-color:#dbb4b6}.tool-strip b{font-size:17px;vertical-align:middle}.board-viewport{position:relative;overflow:auto;max-height:74vh;padding:16px 8px;overscroll-behavior:contain;min-height:260px;scrollbar-width:thin;scrollbar-color:#c4b4b4 var(--paper);text-align:center}#board{display:block;margin:auto;max-width:none;touch-action:none;user-select:none;-webkit-user-select:none;overflow:visible}#board.pan{touch-action:auto;cursor:grab}.guide{stroke:#ddd3c9;stroke-width:1.4;stroke-dasharray:2 6}.edge-hit{stroke:none;pointer-events:all;fill:transparent;cursor:crosshair}.edge-hit:focus{outline:none;fill:#eab77766}.edge-hit:hover{fill:#e8c6bc66}.segment{stroke:var(--line);stroke-width:6;stroke-linecap:round;pointer-events:none}.cross{stroke:#85777b;stroke-width:2.4;stroke-linecap:round;pointer-events:none}.dot{fill:var(--dot);pointer-events:none}.clue{fill:var(--ink);font:500 27px system-ui,sans-serif;text-anchor:middle;dominant-baseline:central;pointer-events:none}.clue.satisfied{fill:#8c958b}.clue.bad{fill:#b10b24;font-weight:850}.clue-ring{fill:#ffe0d6;stroke:#b10b24;stroke-width:2}.hint-edge{stroke:#edae38;stroke-width:16;opacity:.42;pointer-events:none}.hint-cell{fill:#f8dda4;stroke:#bc7b00;stroke-width:2}.bad-dot{fill:#b10b24}.board-footer{display:flex;align-items:center;justify-content:space-between;padding:10px 18px;border-top:1px solid #ded4cb;color:#806e75;font-size:11px;gap:8px}.board-footer div{display:flex;gap:4px;flex-shrink:0}.board-footer button{color:var(--ink);background:transparent;border-color:#dacec3;min-height:36px;padding:4px 10px}.sidebar{display:grid;gap:14px}.panel{border:1px solid var(--border);border-radius:12px;background:linear-gradient(140deg,#2a2027,#211c20);padding:20px}.panel h2{font-family:Georgia,serif;font-size:24px;line-height:1.2;margin:0 0 12px;font-weight:400}.panel p{font-size:13px;color:var(--muted);margin:0 0 16px}.mini-example{display:flex;gap:14px;align-items:center;font-size:10px;color:var(--muted);margin-bottom:22px}.ex-number{display:grid;place-items:center;color:var(--text);font-size:23px;width:45px;height:45px;border:3px solid var(--red);border-right:3px dotted #59464d;border-radius:2px}.progress-label{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;gap:4px}.progress-track{height:3px;background:#4c3841;margin-top:10px;overflow:hidden;border-radius:3px}.progress-track span{display:block;height:100%;background:var(--red);transition:width .25s}.actions{display:grid;gap:10px}.undo-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.primary{background:#c33248;border-color:#d74759;color:#fff;font-weight:650}.primary:hover{background:#d33c51}.message{font-size:12px;line-height:1.65;color:#d4bdc5;border-top:1px solid var(--border);padding-top:14px;margin-top:4px}.message.error{color:#ffad9a}.secondary{display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:12px}.secondary button{font-size:11px;padding:8px;background:none;border-color:transparent}.secondary #randomBtn{grid-column:1/-1;text-align:left}.save-note{font-size:10px;color:var(--muted);margin:0 6px}.bottom{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#a08a93;margin-top:32px;padding-top:20px;border-top:1px solid var(--border)}.bottom em{color:var(--red)}.bottom button{background:none;border:0;min-height:32px;font-size:11px}dialog{background:#211c20;color:var(--text);border:1px solid #63434e;border-radius:16px;padding:24px;width:min(840px,94vw);max-height:88vh;box-shadow:0 20px 100px #0008}dialog::backdrop{background:#100c10ce;backdrop-filter:blur(5px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.dialog-head h2{font:400 30px Georgia,serif;margin:0}.dialog-head button{font-size:26px;padding:0 10px;border:0;background:none}.filters{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0}.filters label{display:grid;gap:6px;font-size:12px;color:var(--muted)}select,input[type=text]{padding:10px;border-radius:6px;border:1px solid #65444f;background:#30242c;color:var(--text);max-width:100%}.puzzle-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}.puzzle-tile{text-align:left;padding:14px;position:relative}.puzzle-tile strong{display:block;font-size:16px}.puzzle-tile span{display:block;font-size:11px;color:var(--muted);margin-top:4px}.puzzle-tile .done{color:#b7dbad}.puzzle-tile .started{color:#f0bd83}.settings-list{display:grid;gap:18px}.settings-list label{display:flex;gap:14px;align-items:center;padding-bottom:12px;border-bottom:1px solid var(--border)}input[type=checkbox]{width:22px;height:22px;accent-color:var(--red);flex-shrink:0}.settings-list small{display:block;color:var(--muted);font-size:12px}.settings-list select{margin-left:auto}.dialog-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}.help-text{font-size:14px;line-height:1.8;color:#d5c6cc}.help-text h3{color:var(--text);margin-top:26px}.help-text kbd{border:1px solid #6a505a;padding:2px 6px;border-radius:4px;background:#362a32;font-size:12px}.rule-examples{display:flex;gap:20px;flex-wrap:wrap}.rule-examples figure{margin:10px 0;text-align:center;font-size:12px}.rule-examples svg{width:120px;height:120px;display:block;background:var(--paper);border-radius:8px;margin-bottom:10px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat{padding:18px;background:#30242b;border-radius:8px}.stat strong{display:block;font-size:26px;color:var(--red)}.stat span{font-size:12px;color:var(--muted)}table{border-collapse:collapse;width:100%;font-size:13px;margin:20px 0}td,th{text-align:left;border-bottom:1px solid var(--border);padding:10px 5px}.tutorial-board{max-width:310px;margin:20px auto;background:var(--paper);border-radius:10px;overflow:hidden}.tutorial-board svg{width:100%;display:block;touch-action:manipulation}.tutorial-desc{font-size:16px;line-height:1.7}.tutorial-step{color:var(--red);font-size:11px;letter-spacing:1px}.success-mark{font-size:56px;color:var(--red);text-align:center}.success-title{text-align:center;font:32px Georgia,serif}.success-note{text-align:center;color:var(--muted)}#pausedOverlay{position:absolute;inset:0;background:var(--paper);display:grid;place-content:center;gap:16px;font:28px Georgia,serif;z-index:4}#pausedOverlay p{margin:0}#pausedOverlay button{font:15px system-ui}.sr-only{position:absolute;clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}.large-text{font-size:18px}.large-text .message,.large-text .panel p{font-size:15px}.high-contrast{--muted:#e2d4da;--text:#fff;--border:#91717e;--ink:#151015;--line:#9e0029;--dot:#110a11}.high-contrast .guide{stroke:#a39894}.high-contrast .clue.satisfied{fill:#436341}.won #board{animation:celebrate .8s ease-out}@keyframes celebrate{50%{filter:drop-shadow(0 0 8px #f5576177)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.reduce-motion *{animation:none!important;transition:none!important}
@media(max-width:900px){main{padding:24px}.game-layout{grid-template-columns:minmax(0,1fr) 250px;gap:14px}.panel{padding:16px}.intro-detail{font-size:15px}h1{font-size:56px}.mast{padding:14px 24px}.mast nav{gap:0}.mast nav button{font-size:12px;padding:8px}.return{margin-left:4px;padding:8px}.brand{font-size:17px}}
@media(max-width:700px){.mast{padding:12px 14px;align-items:start}.brand{font-size:15px;margin-top:7px;flex-shrink:0}.brand small{font-size:7px;letter-spacing:2px}.mast nav{justify-content:flex-end;flex-wrap:wrap;max-width:235px;gap:0}.mast nav button{font-size:11px;padding:5px 7px;min-height:34px}.return{font-size:11px;display:block;min-height:32px;border-left:0}.desktop{display:none}.intro{margin-bottom:16px}.intro-detail{display:none}main{padding:18px 12px}.eyebrow{font-size:8px;letter-spacing:2px}h1{font-size:44px}.tagline{font-size:12px}.game-layout{display:flex;flex-direction:column;gap:12px}.board-card{width:100%;border-radius:10px}.board-header{padding:10px 12px;font-size:11px}.board-header>div{gap:8px}.tool-strip{padding-top:5px;gap:2px}.tool-strip button{font-size:11px;flex:1;max-width:90px;padding:5px 3px;min-height:42px}.board-viewport{padding:10px 4px;max-height:64vh;min-height:230px}.board-footer{padding:6px 10px;font-size:10px}.board-footer button{min-height:36px}.sidebar{width:100%;grid-template-columns:1fr;gap:8px}.objective{display:none}.actions{padding:10px;grid-template-columns:1fr 1fr;gap:8px}.undo-row{grid-column:1/-1;grid-template-columns:1fr 1fr}.actions #hintBtn{grid-column:1}.actions #checkBtn{grid-column:2}.message,.actions #applyHint,.actions #revealHint{grid-column:1/-1}.message{margin-top:0;padding-top:8px;font-size:12px}.secondary{grid-template-columns:repeat(2,1fr);padding:6px}.secondary #randomBtn{grid-column:auto;text-align:center}.secondary button{font-size:10px}.save-note{font-size:9px}.bottom{margin-top:20px;gap:10px;font-size:9px}.bottom>span:nth-child(2){display:none}.stats-grid{grid-template-columns:1fr 1fr}.stat{padding:12px}dialog{padding:18px}.dialog-head h2{font-size:26px}.puzzle-list{grid-template-columns:repeat(2,minmax(0,1fr))}.settings-list label{font-size:13px;gap:10px}}