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.box{background:var(--line);box-shadow:var(--shadow);padding:3px}.cell{border-radius:var(--cell-radius);background:var(--surface);min-width:0;min-height:0;color:var(--ink);font-size:calc(var(--cell) * .56);cursor:pointer;border:0;place-items:center;padding:0;line-height:1;transition:background-color .12s;display:grid;position:relative;overflow:hidden}.cell:focus-visible{outline:3px solid var(--accent);outline-offset:-3px;z-index:1}.cell .digit{font-weight:var(--digit-weight);font-variant-numeric:tabular-nums}.cell.is-given .digit{font-weight:var(--given-weight)}.cell.is-player{color:var(--player)}.cell.is-related{background:var(--related)}.cell.is-same{background:var(--same)}.cell.is-focus{background:var(--mark)}.cell.is-pattern{background:var(--mark);box-shadow:inset 0 0 0 2px var(--pop-3)}.cell.is-target{background:var(--target)}.cell.is-selected{background:var(--sel)}.cell.is-wrong{background:var(--wrong-bg);color:var(--wrong)}.cell.is-clash{color:var(--wrong)}.cell.is-clash 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*{visibility:hidden}.pause-cover{text-align:center;background:color-mix(in srgb, var(--bg) 86%, transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:var(--box-radius);place-content:center;justify-items:center;gap:10px;padding:24px;display:grid;position:absolute;inset:0}.pause-title{font-size:1.8rem;font-weight:700}.pause-note{color:var(--ink-soft);max-width:28ch;margin-bottom:6px}.dock{flex-direction:column;gap:6px;display:flex;position:relative}.message-line{text-align:center;min-height:36px;color:var(--ink-soft);justify-content:center;align-items:center;font-size:.9rem;display:flex}.message-line.is-toast{color:var(--ink);font-weight:600;animation:.2s fade}.dock.has-hint>.message-line,.dock.has-hint>.toolbar{visibility:hidden}.hint-card{z-index:2;border-radius:var(--radius);background:var(--mark);flex-direction:column;justify-content:center;gap:8px;min-height:100%;padding:10px 40px 10px 12px;animation:.18s fade;display:flex;position:absolute;bottom:0;left:0;right:0;box-shadow:0 6px 18px #0000001f}.hint-close{width:36px;height:36px;color:var(--ink);cursor:pointer;background:0 0;border:0;border-radius:50%;place-items:center;display:grid;position:absolute;top:4px;right:4px}.hint-close:hover{background:color-mix(in srgb, var(--ink) 10%, transparent)}.hint-notice{color:var(--ink-soft);font-size:.8rem;font-weight:600}.hint-text{font-size:.95rem;font-weight:500}.hint-actions{flex-wrap:wrap;gap:6px;display:flex}@keyframes fade{0%{opacity:0;transform:translateY(4px)}}.toolbar{grid-template-columns:repeat(5,minmax(0,1fr));gap:2px;display:grid}.tool{border-radius:var(--radius);min-height:56px;color:var(--ink);cursor:pointer;background:0 0;border:0;align-content:start;justify-items:center;gap:2px;padding:6px 0;display:grid}.tool-label{text-align:center;color:var(--ink-soft);font-size:.7rem;font-weight:600;line-height:1.15}.tool:hover:not(:disabled){background:var(--related)}.tool.is-on{background:var(--accent);color:var(--accent-ink)}.tool.is-on .tool-label{color:var(--accent-ink)}.tool:disabled{opacity:.4;cursor:default}.tool[aria-busy=true]{opacity:.7}.numpad{grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;display:grid}.key{border:1.5px solid var(--line);border-radius:var(--radius);background:var(--surface);min-height:54px;color:var(--player);cursor:pointer;align-content:center;justify-items:center;gap:1px;padding:4px 0;transition:transform .1s;display:grid}.key-digit{font-size:1.6rem;font-weight:600;line-height:1}.key-left{color:var(--ink-soft);min-height:1em;font-size:.68rem;font-weight:600}.key-erase{color:var(--ink)}.key.is-clash{border-color:var(--wrong);color:var(--wrong);background:var(--wrong-bg)}.key:active:not(:disabled){transform:scale(.94)}.key:disabled{opacity:.35;cursor:default}.numpad.is-notes .key:not(.key-erase){color:var(--ink-soft);border-style:dashed}[data-style=playful] .key{box-shadow:var(--shadow);border:0}[data-style=playful] .key.is-clash{box-shadow:inset 0 0 0 2px var(--wrong), var(--shadow)}[data-style=playful] .key:active:not(:disabled){box-shadow:none;transform:translateY(3px)}[data-style=playful] .numpad.is-notes .key:not(.key-erase){outline:2px dashed var(--line);outline-offset:-4px}@media (min-width:860px){.toolbar{gap:4px}.tool{padding:10px 0}.key{min-height:64px}.key-digit{font-size:1.8rem}}@media (max-width:380px){.key{min-height:48px}.key-digit{font-size:1.35rem}.tool-label{font-size:.64rem}}.sheet{border-radius:calc(var(--radius) + 4px);background:var(--surface);width:min(420px,100vw - 32px);color:var(--ink);border:0;padding:20px;box-shadow:0 24px 60px #00000040}.sheet[open]{gap:18px;animation:.18s fade;display:grid}.sheet::backdrop{background:#0a0c1473}.sheet-head{justify-content:space-between;align-items:center;margin:-6px -10px -6px 0;display:flex}.sheet h2{font-size:1.3rem;font-weight:700}.choice{border:0;gap:8px;margin:0;padding:0;display:grid}.choice legend{padding:0 0 8px;font-weight:600}.segmented{border-radius:var(--radius);background:var(--related);grid-auto-columns:1fr;grid-auto-flow:column;gap:3px;padding:3px;display:grid}.segmented label{border-radius:calc(var(--radius) - 3px);cursor:pointer;place-items:center;min-height:40px;font-weight:600;display:grid}.segmented label.is-on{background:var(--accent);color:var(--accent-ink)}.segmented label:has(input:focus-visible){outline:3px solid var(--accent)}.segmented input{opacity:0;pointer-events:none;position:absolute}.switch{cursor:pointer;justify-content:space-between;align-items:center;gap:16px;font-weight:600;display:flex}.switch small{color:var(--ink-soft);font-weight:400;display:block}.switch input{appearance:none;background:var(--line);cursor:pointer;border-radius:14px;flex:none;width:48px;height:28px;transition:background-color .15s;position:relative}.switch input:after{content:"";background:#fff;border-radius:50%;width:22px;height:22px;transition:transform .15s;position:absolute;top:3px;left:3px}.switch input:checked{background:var(--accent)}.switch input:checked:after{transform:translate(20px)}.win{text-align:center}.win h2{font-size:2rem}[data-style=playful] .win h2{color:var(--accent)}.win-level{color:var(--ink-soft);margin-top:-12px}.win-stats{border-block:1.5px solid var(--line);grid-template-columns:repeat(3,1fr);margin:0;padding:14px 0;display:grid}.win-stats dt{color:var(--ink-soft);font-size:.85rem}.win-stats dd{font-variant-numeric:tabular-nums;margin:0;font-size:1.5rem;font-weight:700}.sheet-actions{gap:8px;display:grid}.confetti{pointer-events:none;z-index:1000;width:100%;height:100%;position:fixed;inset:0}[data-style][data-mode] .cell.is-clash,.notes .note.is-stale{color:var(--wrong)}.notes .note.is-struck{opacity:.35;text-decoration:line-through;text-decoration-thickness:1.5px}.notes-links{flex-wrap:wrap;justify-content:center;gap:4px 18px;display:flex}.link-btn{min-height:36px;color:var(--accent);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:0 4px;font-size:.9rem;font-weight:600;text-decoration:underline}.check-row{cursor:pointer;align-items:center;gap:10px;min-height:44px;font-size:.92rem;display:flex}.check-row input{width:20px;height:20px;accent-color:var(--accent)}.btn.danger-solid{background:var(--wrong);border-color:var(--wrong);color:#fff}.sheet-actions.row{grid-template-columns:1fr 1fr}.confirm h2{font-size:1.2rem}.confirm-body{color:var(--ink-soft)}.win-note{color:var(--ink-soft);margin-top:-6px;font-weight:600}.head-actions{gap:2px;display:flex}.stats{max-width:640px;padding:max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 40px max(16px, env(safe-area-inset-left));gap:16px;margin:0 auto;display:grid}.stats-head{align-items:center;gap:8px;margin-left:-10px;display:flex}.stats-head h1{letter-spacing:-.02em;font-size:1.8rem;font-weight:800}[data-style=playful] .stats-head h1{letter-spacing:0;color:var(--accent);font-weight:700}.stats-intro{color:var(--ink-soft);max-width:52ch}.stats-done{border-radius:var(--radius);background:var(--related);padding:10px 14px;font-weight:600}.stats-level{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);gap:8px;padding:16px;display:grid}[data-style=playful] .stats-level{box-shadow:var(--shadow);border:0}.stats-level h2{font-size:1.15rem;font-weight:700}.stats-table-wrap{overflow-x:auto}.stats-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%}.stats-table th,.stats-table td{text-align:right;white-space:nowrap;padding:6px 4px}.stats-table thead th{color:var(--ink-soft);border-bottom:1.5px solid var(--line);font-size:.8rem;font-weight:600}.stats-table tbody th{text-align:left;white-space:normal;font-weight:500}.stats-table td{font-weight:700}.stats-extra,.stats-empty,.stats-note{color:var(--ink-soft);font-size:.9rem}.stats-reset{justify-self:start}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.help{z-index:50;background:var(--bg);animation:.18s fade;position:fixed;inset:0;overflow:hidden}.help-inner{height:100%;padding:0 max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));overflow-y:auto}.help-head{z-index:2;max-width:720px;padding:max(12px, env(safe-area-inset-top)) 0 6px;background:var(--bg);align-items:center;gap:4px;margin:0 auto;display:flex;position:sticky;top:0}.help-head h1{flex:1;font-size:1.4rem;font-weight:800}[data-style=playful] .help-head h1{color:var(--accent);font-weight:700}.cards{gap:14px;max-width:720px;margin:8px auto 0;display:grid}.cards-track{scroll-snap-type:x mandatory;scrollbar-width:none;border-radius:var(--radius);grid-auto-columns:100%;grid-auto-flow:column;display:grid;overflow-x:auto}.cards-track::-webkit-scrollbar{display:none}.help-card{scroll-snap-align:start;background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);flex-direction:column;gap:12px;min-width:0;padding:18px;display:flex}[data-style=playful] .help-card{box-shadow:var(--shadow);border:0}.help-card h2{font-size:1.25rem;font-weight:700}.card-art{justify-items:center;display:grid}.card-body p{max-width:60ch}.card-body p+p{margin-top:8px}.card-links,.cards-foot{flex-wrap:wrap;gap:4px 20px;display:flex}.cards-foot{justify-content:center}.cards-nav{justify-content:space-between;align-items:center;gap:12px;display:flex}.dots{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.dots i{background:var(--line);border-radius:50%;width:8px;height:8px}.dots i.on{background:var(--accent)}.card-levels{gap:6px;margin:0;padding:0;font-weight:600;list-style:none;display:grid}.card-levels li{align-items:center;gap:12px;display:flex}.card-bars{align-items:flex-end;gap:2px;height:18px;display:flex}.card-bars i{background:var(--line);border-radius:1px;width:4px}.card-bars i:first-child{height:30%}.card-bars i:nth-child(2){height:47%}.card-bars i:nth-child(3){height:65%}.card-bars i:nth-child(4){height:82%}.card-bars i:nth-child(5){height:100%}.card-bars i.on{background:var(--accent)}.help-video{border-radius:var(--radius);background:var(--related);max-width:100%;display:block}.help-video.is-portrait{aspect-ratio:9/16;height:min(52vh,460px)}.help-video.is-landscape{aspect-ratio:16/9;width:100%}.video-missing{color:var(--ink-soft);font-size:.9rem}.shortcuts{border-collapse:collapse;width:100%}.shortcuts th,.shortcuts td{text-align:left;vertical-align:top;padding:5px 8px 5px 0;font-size:.92rem}.shortcuts th{white-space:nowrap;font-weight:500}kbd{border:1.5px solid var(--line);background:var(--surface);font:inherit;border-bottom-width:3px;border-radius:6px;padding:1px 7px;font-size:.85rem;font-weight:600;display:inline-block}.doc{gap:12px;max-width:720px;margin:8px auto 0;line-height:1.6;display:grid}.doc h2{margin-top:14px;font-size:1.3rem;font-weight:700}.doc h3{font-size:1.08rem;font-weight:700}.doc p,.doc li{max-width:68ch}.doc 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