:root{--bg:#f4f1ea;--panel:#fff;--ink:#1d2433;--muted:#6b7280;--line:#2b3242;--wall:#1f2430;--white:#fff;--lit:#ffe98a;--bulb:#ffc928;--bulb-stroke:#a87400;--cross:#5b6475;--error:#e5383b;--accent:#2f6fed;--dev-bg:#1d2433;--dev-ink:#c9d3e6;color:var(--ink);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{background:var(--bg);-webkit-tap-highlight-color:transparent;margin:0}button{font:inherit;color:inherit}.app{flex-direction:column;gap:10px;max-width:520px;margin:0 auto;padding:12px 16px 24px;display:flex}.topbar{justify-content:space-between;align-items:center;display:flex}.topbar h1{margin:0;font-size:20px}.devbar{background:var(--dev-bg);color:var(--dev-ink);border-radius:10px;padding:8px 10px;font:12px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace}.devbar-row{width:100%;font:inherit;color:inherit;text-align:left;cursor:pointer;background:0 0;border:none;justify-content:space-between;gap:8px;padding:0;display:flex}.devbar-dim{opacity:.65}.devbar-warn{color:#ffb4b4}.devbar-kv{gap:1ch;display:flex}.devbar-kv>:first-child{opacity:.65;flex:0 0 10ch}.devbar-toggles{gap:14px;margin-top:6px;display:flex}.devbar-toggles label{cursor:pointer;align-items:center;gap:4px;display:flex}.solution-mark{fill:none;stroke:#e0a800;stroke-width:2px;stroke-dasharray:4 3;pointer-events:none}.move-mark{pointer-events:none}.devbar-toggle{opacity:.6}.devbar-more{border-top:1px solid #c9d3e633;margin-top:6px;padding-top:6px}.statusbar{justify-content:space-between;align-items:center;gap:8px;display:flex}.timer{min-width:90px;font:600 22px ui-monospace,SFMono-Regular,Menlo,monospace}.lamp-counter{font:600 20px ui-monospace,SFMono-Regular,Menlo,monospace}.lives{letter-spacing:2px;text-align:right;min-width:90px;font-size:22px}.heart{color:var(--error)}.heart-lost{color:#c9c3b6}.board-wrap{width:100%}.board{touch-action:manipulation;-webkit-user-select:none;user-select:none;border-radius:6px;width:100%;height:auto;display:block}.board-bg{fill:var(--line)}.hint-dim{fill:#0d111a9e;pointer-events:none}:root{--role-subject:#2563eb;--role-places:#0d9488;--role-imagined:#b45309;--role-gone:#dc2626;--role-answer:#16a34a;--role-answer-lamp:#a16207}.hint-subject{fill:#2563eb38;stroke:var(--role-subject);stroke-width:4px}.hint-frames .hint-dim{fill:#0d111ac7}.hint-imagined-lit{fill:#f59e0b38;pointer-events:none}.hint-broken{fill:#dc26262e;stroke:var(--role-gone);stroke-width:4px}.hint-closed{fill:#b453092e;stroke:var(--role-imagined);stroke-width:4px}.hint-places{fill:#0d948824;stroke:var(--role-places);stroke-width:3px;stroke-dasharray:6 4}.hint-imagined .lamp{opacity:.55}.hint-gone line{stroke:var(--role-gone);stroke-width:3px;stroke-linecap:round}.hint-frames .ghost-cross line{stroke:var(--role-answer)}.ref{font-weight:600}.ref-subject{color:var(--role-subject)}.ref-places{color:var(--role-places)}.ref-imagined{color:var(--role-imagined)}.ref-gone{color:var(--role-gone)}.ref-answer{color:var(--role-answer)}.ref-answer-lamp{color:var(--role-answer-lamp)}.hint-more{color:var(--accent);font:inherit;cursor:pointer;background:0 0;border:none;margin-left:6px;padding:0;text-decoration:underline}.hint-ray line{stroke:#ffb703;stroke-width:5px;stroke-linecap:round;opacity:.85}.hint-could{opacity:.9}.hint-could line{stroke:var(--role-places);stroke-width:4px;stroke-linecap:round;stroke-dasharray:2 8}.hint-could path{fill:var(--role-places)}.hint-ray circle{fill:#ffb703}.ghost{pointer-events:none;animation:1.1s ease-in-out infinite pulse}.ghost-cross line{stroke:var(--accent);stroke-width:3.5px;stroke-linecap:round}.ghost-remove{fill:none;stroke:var(--error);stroke-width:3px}@keyframes pulse{0%,to{opacity:1}50%{opacity:.45}}.hint-card{background:var(--panel);border-radius:14px;flex-direction:column;gap:10px;padding:12px 14px;display:flex;box-shadow:0 4px 18px #1418211f}.hint-head{align-items:center;gap:8px;display:flex}.hint-badge{color:var(--ink);background:#eef1f6;border-radius:999px;padding:3px 8px;font:600 12px ui-monospace,SFMono-Regular,Menlo,monospace}.hint-badge.tier-0{background:#eceef2}.hint-badge.tier-1{color:#106a3a;background:#dcf3e5}.hint-badge.tier-2{color:#1d4fbf;background:#dde8fd}.hint-badge.tier-3{color:#6d28c9;background:#ece0fb}.hint-badge.tier-4{color:#b45309;background:#fdebd3}.hint-badge.tier-5{color:#b42318;background:#fde2e1}.hint-new{color:#b45309;font-size:12px;font-weight:600}.hint-count{color:var(--muted);margin-left:auto;font-size:13px}.hint-close{padding:2px 4px;font-size:16px}.hint-text{margin:0;font-size:15px;line-height:1.45}.hint-actions{justify-content:flex-end;gap:8px;display:flex}.hint-actions .btn{min-width:96px}.cell-white{fill:var(--white);transition:fill .12s}.cell-white.lit{fill:var(--lit)}.cell-wall{fill:var(--wall)}.clue{fill:#fff;text-anchor:middle;dominant-baseline:middle;pointer-events:none;font:700 20px -apple-system,BlinkMacSystemFont,sans-serif}.grid line{stroke:var(--line);stroke-width:1.5px}.lamp-glow{fill:#fff3b0}.lamp-bulb{fill:var(--bulb);stroke:var(--bulb-stroke);stroke-width:1.5px}.lamp-base{fill:#59606e}.cross line{stroke:var(--cross);stroke-width:2.5px;stroke-linecap:round}.cross-error line{stroke:var(--error);stroke-width:3.5px}.error-flash{fill:var(--error);pointer-events:none;animation:.6s ease-out forwards flash}@keyframes flash{0%{opacity:.75}to{opacity:0}}.shake-0{animation:.32s ease-in-out shake0}.shake-1{animation:.32s ease-in-out shake1}@keyframes shake0{0%,to{transform:translate(0)}20%,60%{transform:translate(-6px)}40%,80%{transform:translate(6px)}}@keyframes shake1{0%,to{transform:translate(0)}20%,60%{transform:translate(-6px)}40%,80%{transform:translate(6px)}}.controls-hint{text-align:center;color:var(--muted);margin:0;font-size:13px}.actions{gap:8px;display:flex}.actions .btn{white-space:nowrap;flex:1;padding:10px 6px;font-size:14px}.btn{background:var(--panel);cursor:pointer;border:1px solid #d6d0c4;border-radius:10px;padding:10px 12px;font-size:15px}.btn:disabled{opacity:.45;cursor:default}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.wide{width:100%}.icon-btn{cursor:pointer;background:0 0;border:none;padding:6px 8px;font-size:22px}.sheet-backdrop,.dialog-backdrop{z-index:10;background:#14182173;display:flex;position:fixed;inset:0}.sheet-backdrop{justify-content:center;align-items:flex-end}.dialog-backdrop{justify-content:center;align-items:center;padding:16px}.sheet,.dialog{background:var(--panel);flex-direction:column;gap:14px;width:100%;max-width:520px;padding:16px;display:flex}.sheet{border-radius:16px 16px 0 0;max-height:85vh;overflow-y:auto}.dialog{text-align:center;border-radius:16px;max-width:360px}.sheet-head{justify-content:space-between;align-items:center;display:flex}.sheet h2,.dialog h2{margin:0;font-size:18px}.dialog p{color:var(--muted);margin:0}.field{color:var(--muted);flex-direction:column;gap:6px;font-size:14px;display:flex}.field-check{color:var(--muted);cursor:pointer;align-items:center;gap:6px;font-size:14px;display:flex}.segmented{flex-wrap:wrap;gap:4px;display:flex}.segmented button{background:var(--panel);cursor:pointer;border:1px solid #d6d0c4;border-radius:8px;flex:1;min-width:40px;padding:8px 0}.segmented button.on{background:var(--ink);border-color:var(--ink);color:#fff}.seed-row{gap:8px;display:flex}.seed-row input{border:1px solid #d6d0c4;border-radius:8px;flex:1;min-width:0;padding:8px 10px;font-size:16px}input[type=range]{width:100%}.topbar-icons{gap:2px;display:flex}.tutorial{z-index:20;background:var(--bg);flex-direction:column;display:flex;position:fixed;inset:0}.tut-head{justify-content:space-between;align-items:center;width:100%;max-width:520px;margin:0 auto;padding:12px 16px 4px;display:flex}.tut-head h2{margin:0;font-size:20px}.tut-nav{gap:6px;width:100%;max-width:520px;margin:0 auto;padding:6px 16px 10px;display:flex;overflow-x:auto}.tut-nav a{background:var(--panel);color:var(--ink);border:1px solid #d6d0c4;border-radius:999px;flex:none;padding:5px 10px;font:600 13px ui-monospace,SFMono-Regular,Menlo,monospace;text-decoration:none}.tier-chip.tier-0{background:#eceef2}.tier-chip.tier-1{color:#106a3a;background:#dcf3e5}.tier-chip.tier-2{color:#1d4fbf;background:#dde8fd}.tier-chip.tier-3{color:#6d28c9;background:#ece0fb}.tier-chip.tier-4{color:#b45309;background:#fdebd3}.tier-chip.tier-5,.tier-chip.tier-6{color:#b42318;background:#fde2e1}.tut-body{scroll-behavior:smooth;flex:1;width:100%;max-width:520px;margin:0 auto;padding:0 16px 40px;overflow-y:auto}.tut-section{padding-top:8px;scroll-margin-top:8px}.tut-section h3{margin:14px 0 2px;font-size:18px}.tut-summary{color:var(--muted);margin:0 0 8px;font-size:14px}.tut-entry{background:var(--panel);border-radius:14px;margin-bottom:12px;padding:12px 14px}.tut-entry h4{margin:0 0 4px;font-size:16px}.tut-legend{color:var(--muted);margin:10px 0 0;font-size:13px}.tut-tech{color:var(--muted);vertical-align:2px;white-space:nowrap;background:#f6f4ef;border-radius:6px;margin-left:8px;padding:1px 6px;font-size:12px;font-weight:500}.tut-entry p{margin:0;font-size:14px;line-height:1.45}.tut-example{flex-direction:column;align-items:center;gap:8px;margin-top:10px;display:flex}.mini-board{width:100%;height:auto;display:block}.tut-caption{color:var(--ink);background:#f6f4ef;border-radius:10px;align-self:stretch;padding:8px 10px}.tut-gallery{margin-top:10px}.tut-frames{color:var(--muted);align-items:center;gap:10px;font-size:14px;display:flex}.tut-frames .btn{padding:6px 10px;font-size:14px}.loading{min-height:100vh;color:var(--muted);justify-content:center;align-items:center}.gen-overlay{z-index:15;background:#f4f1eabf;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.gen-box{background:var(--panel);border-radius:14px;flex-direction:column;align-items:center;gap:10px;padding:16px 18px;font-size:14px;display:flex;box-shadow:0 6px 24px #14182126}.gen-best{color:var(--muted);font:12px ui-monospace,SFMono-Regular,Menlo,monospace}.spinner{border:3px solid #e3ded3;border-top-color:var(--accent);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.sheet-section{margin:4px 0 -4px;font-size:15px}.advanced summary{cursor:pointer;color:var(--muted);font-size:14px}.advanced[open]{flex-direction:column;gap:10px;display:flex}.adv-note{color:var(--muted);margin:4px 0 0;font-size:12px}.num-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.num-field{color:var(--muted);flex-direction:column;gap:3px;font-size:12px;display:flex}.num-field input{border:1px solid #d6d0c4;border-radius:8px;min-width:0;padding:6px 8px;font-size:16px}.gen-last{color:var(--muted);margin:0;font:12px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace}