:root{--bg:#f7f5f0;--surface:#fff;--ink:#16202c;--muted:#4d5966;--line:#c9c3b6;--accent:#1d3557;--path:#e0a526;--path-ink:#8a5a00;--visited:#fbedc8;--danger:#b3261e;--alert:#c2410c;--on-alert:#fff;--focus:#0b63ce;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino Sans,Hiragino Kaku Gothic ProN,Yu Gothic UI,Apple SD Gothic Neo,Malgun Gothic,Noto Sans CJK JP,Noto Sans CJK KR,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#12171d;--surface:#1b232c;--ink:#eef2f6;--muted:#a9b4c0;--line:#3a4552;--accent:#9cc3f5;--path:#e8b33c;--path-ink:#f3cf7a;--visited:#3b3220;--danger:#ff8a80;--alert:#f08a4b;--on-alert:#12171d;--focus:#8ab8ff;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;margin:0}main{max-width:560px;margin:0 auto;padding:12px 16px 40px}h1,h2{margin:.4em 0;line-height:1.2}button{font:inherit;border:2px solid var(--accent);background:var(--surface);min-height:48px;color:var(--accent);cursor:pointer;touch-action:manipulation;border-radius:12px;padding:10px 18px;font-weight:600}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);color:var(--bg)}button.danger{border-color:var(--danger);color:var(--danger)}button.wide{width:100%;font-size:1.15rem}button.link-button{background:0 0;border:none;min-height:44px;padding:8px 4px;text-decoration:underline}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.notice{border-left:4px solid var(--danger);background:var(--surface);max-width:560px;margin:8px auto;padding:10px 14px}.brand{letter-spacing:.02em;margin-bottom:0;font-size:2.4rem}.tagline{color:var(--muted);margin-top:0}.rule{margin:8px 0;font-size:1.05rem}.rule.big{font-size:1.2rem;font-weight:600}.level-group h2{margin-top:1.4em;font-size:1.1rem}.level-list{gap:8px;margin:0;padding:0;list-style:none;display:grid}.level{text-align:left;border-width:1px;border-color:var(--line);width:100%;color:var(--ink);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"name status""meta status""lock lock";column-gap:8px;display:grid}.level-name{grid-area:name}.level-meta{color:var(--muted);grid-area:meta;font-size:.9rem;font-weight:400}.level-status{grid-area:status;align-self:center;font-size:.9rem}.level.done{border-left:6px solid var(--accent)}.level.started{border-left:6px dashed var(--path)}.game-header{align-items:center;gap:8px;display:flex}.game-title h1{margin:0;font-size:1.3rem}.game-title p{margin:0;font-size:.9rem}.hint{background:var(--surface);border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:8px 12px}.board{background:var(--line);touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;cursor:pointer;border-radius:10px;gap:2px;width:100%;max-width:min(100%,68vh);margin:12px auto 4px;padding:2px;display:grid;position:relative}.cell{background:var(--surface);aspect-ratio:1;border-radius:4px;justify-content:center;align-items:center;display:flex;position:relative}.cell.visited{background:var(--visited)}.cell.blocked{background:repeating-linear-gradient(45deg, var(--line) 0 4px, var(--bg) 4px 10px)}.cell.refused{outline:3px dashed var(--danger);outline-offset:-5px}.refused-mark{color:var(--danger);z-index:3;font-size:.85rem;font-weight:700;position:absolute;top:2px;right:5px}.clue{z-index:2;aspect-ratio:1;background:var(--surface);width:64%;color:var(--ink);border:3px solid var(--ink);font-variant-numeric:tabular-nums;border-radius:50%;justify-content:center;align-items:center;font-size:clamp(1rem,5.2vw,1.6rem);font-weight:800;display:flex;position:relative}.clue.reached{background:var(--ink);color:var(--surface)}.clue.next{box-shadow:0 0 0 3px var(--surface), 0 0 0 6px var(--path-ink)}.trace{pointer-events:none;z-index:1;width:calc(100% - 4px);height:calc(100% - 4px);position:absolute;inset:2px}.trace polyline{fill:none;stroke:var(--path);stroke-width:.3px;stroke-linecap:round;stroke-linejoin:round}.trace .head{fill:var(--path-ink)}.board.won .trace polyline{stroke-dasharray:none;stroke:var(--path-ink)}.status{text-align:center;min-height:1.5em;margin:8px 0 0;font-size:1.05rem}.message{text-align:center;min-height:1.5em;color:var(--danger);margin:4px 0;font-weight:600}.actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px;display:flex}.actions button{flex:140px}.win{text-align:center;background:var(--surface);border:2px solid var(--accent);border-radius:14px;margin-top:8px;padding:12px 16px 16px}.win h2{margin-top:0}.stats{border-collapse:collapse;width:100%;margin:8px 0 16px}.stats th,.stats td{text-align:left;border-bottom:1px solid var(--line);padding:6px 4px;font-weight:400}.stats td{text-align:right;font-variant-numeric:tabular-nums}.per-level{font-size:.85rem}.per-level th{white-space:nowrap;font-weight:600}.per-level td{white-space:nowrap}.table-scroll{overflow-x:auto}.confirm{flex-wrap:wrap;align-items:center;gap:8px;display:flex}@media (width>=900px){main{padding-top:24px}}.home-top{justify-content:space-between;align-items:center;gap:8px;display:flex}.cell.mark-hint{outline:3px dotted var(--focus);outline-offset:-5px}.cell.mark-problem{outline:4px solid var(--alert);outline-offset:-5px}.cell.mark-back{outline:4px double var(--accent);outline-offset:-6px}.cell-badge{z-index:3;border-radius:999px;justify-content:center;align-items:center;min-width:1.15rem;height:1.15rem;padding:0 3px;font-size:.75rem;font-weight:800;line-height:1;display:flex;position:absolute;top:3px;left:3px}.badge-hint{color:var(--focus)}.badge-problem{background:var(--alert);color:var(--on-alert)}.badge-back{background:var(--accent);color:var(--bg)}@media (forced-colors:active){.cell.mark-hint,.cell.mark-problem,.cell.mark-back{outline-color:canvastext}.badge-problem,.badge-back{border:1px solid canvastext}}.trace .ghost{stroke:var(--focus);stroke-width:.1px;stroke-dasharray:.12 .12;stroke-linecap:round}.hint-panel{background:var(--surface);border:2px dotted var(--focus);border-radius:10px;margin:8px 0 0;padding:8px 12px;line-height:1.4}.hint-panel .technique{font-weight:700}.actions .hint-button{flex-basis:100%}.free-play .level-list{grid-template-columns:repeat(auto-fit,minmax(9.5rem,1fr))}.level.locked{color:var(--muted);cursor:not-allowed;opacity:1;border-style:dashed}.level-lock{color:var(--muted);grid-area:lock;margin-top:2px;font-size:.8rem;font-weight:600}.level-name,.level-meta{white-space:nowrap}.unlock-all{margin-top:16px}.unlock-all .confirm span{flex-basis:100%}.unlocked{font-weight:700}.alert-text{color:var(--alert)}button,h1,h2,.status,.message,.hint-panel,.level-name,.level-status,.level-meta,.stats th{overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto}:lang(ja){line-break:strict}:lang(ko){word-break:keep-all;overflow-wrap:anywhere}.icon-button{min-width:44px;min-height:44px;color:var(--muted);background:0 0;border:none;padding:0;font-size:1.5rem;line-height:1}.icon-button:hover{color:var(--accent)}.lang-choice{border:1px solid var(--line);border-radius:12px;margin:12px 0;padding:8px 12px 12px}.lang-choice legend{padding:0 4px;font-weight:700}.lang-option{cursor:pointer;border-radius:8px;align-items:center;gap:12px;min-height:48px;padding:4px 8px;display:flex}.lang-option.selected{background:var(--visited);font-weight:700}.lang-option input{width:22px;height:22px;accent-color:var(--accent);flex-shrink:0}.actions button:not(.hint-button){white-space:nowrap;flex:auto}.daily .level{border-left:6px solid var(--path)}.streak{margin:8px 0 2px;font-weight:700}.timer{font-variant-numeric:tabular-nums;color:var(--muted);white-space:nowrap;align-self:flex-start;margin:0 0 0 auto;font-weight:700}.stars{letter-spacing:.15em;color:var(--path-ink);margin:0;font-size:2rem}.stars .star-empty{color:var(--line)}.challenge-result{font-size:1.1rem;font-weight:700}.message.neutral{color:var(--ink);font-weight:400}.share-fallback{width:100%;font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:8px;font-size:.9rem}.challenge-screen .actions{margin:12px 0}.pref-subtitle{margin:12px 0 0;font-weight:700}:root[data-size=large]{font-size:112%}:root[data-size=xl]{font-size:125%}:root[data-size=large] main,:root[data-size=xl] main{padding-left:8px;padding-right:8px}:root[data-size=large] .board{max-width:min(100%,80vh)}:root[data-size=xl] .board{max-width:min(100%,92vh)}:root[data-size=large] .clue{width:72%}:root[data-size=xl] .clue{border-width:4px;width:80%}:root[data-palette=cb]{--path:#0072b2;--path-ink:#004b75;--visited:#d6e9f5;--alert:#d55e00;--danger:#d55e00;--focus:#cc79a7}@media (prefers-color-scheme:dark){:root[data-palette=cb]{--path:#56b4e9;--path-ink:#a6dcf7;--visited:#1c3446;--alert:#e69f00;--danger:#e69f00;--focus:#f0a6cf;--on-alert:#12171d}}:root[data-contrast=high]{--bg:#fff;--surface:#fff;--ink:#000;--muted:#1a1a1a;--line:#000;--accent:#000;--visited:#fff2b3;--path-ink:#000}:root[data-contrast=high] .board{gap:3px;padding:3px}:root[data-contrast=high] .trace polyline{stroke-width:.36px}:root[data-contrast=high] .clue{border-width:4px}:root[data-contrast=high] .cell.blocked{background:repeating-linear-gradient(45deg,#000 0 3px,#fff 3px 9px)}@media (prefers-color-scheme:dark){:root[data-contrast=high]{--bg:#000;--surface:#000;--ink:#fff;--muted:#e6e6e6;--line:#fff;--accent:#fff;--visited:#3d3200;--path-ink:#fff}:root[data-contrast=high] .cell.blocked{background:repeating-linear-gradient(45deg,#fff 0 3px,#000 3px 9px)}}.win .actions button.primary{white-space:normal;flex-basis:100%}.tier-locked{border:1px dashed var(--line);border-radius:12px;margin-top:1.4em;padding:2px 14px 12px}.tier-locked h2{color:var(--muted);margin-top:.6em}.tier-locked>.level-lock{margin:0 0 4px;font-size:.9rem}.tier-locked .level-list{margin-top:8px}div.level{box-sizing:border-box;border:1px dashed var(--line);background:var(--surface);border-radius:12px;min-height:48px;padding:10px 18px;font-weight:600}.level-list.nested{margin-top:8px}