:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#f8fafc;--fg:#0f172a;--surface:#fff;--surface-alt:#f1f5f9;--muted:#475569;--muted-soft:#64748b;--faint:#94a3b8;--given:#111827;--entry:#1d4ed8;--conflict-bg:#fee2e2;--conflict:#b91c1c;--selected-bg:#dbeafe;--same-digit-bg:#e8eefb;--line:#cbd5e1;--line-strong:#334155;--ok:#15803d;--solved-bg:#ecfdf5;--accent:#d97706;--accent-soft:#fef3c7;--accent-strong:#92400e;--cage:#d97706;--cage-sum:#b45309;--fog-a:#e2e8f0;--fog-b:#d8dee9;--fog-killer-a:#e8edf4;--fog-killer-b:#dfe6ef;--peek-given-bg:#eef2f7;--backdrop:#0f172a8c}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}:root:not([data-theme=light]){--bg:#0f172a;--fg:#e2e8f0;--surface:#1e293b;--surface-alt:#263449;--muted:#94a3b8;--muted-soft:#94a3b8;--faint:#64748b;--given:#f1f5f9;--entry:#60a5fa;--conflict-bg:#4c1d1d;--conflict:#fca5a5;--selected-bg:#1e3a5f;--same-digit-bg:#1b2740;--line:#475569;--line-strong:#94a3b8;--ok:#4ade80;--solved-bg:#14352a;--accent:#f59e0b;--accent-soft:#422c07;--accent-strong:#fcd34d;--cage:#f59e0b;--cage-sum:#fbbf24;--fog-a:#243044;--fog-b:#2b3950;--fog-killer-a:#26324a;--fog-killer-b:#2d3b55;--peek-given-bg:#23324a;--backdrop:#020617b3}}:root[data-theme=dark]{--bg:#0f172a;--fg:#e2e8f0;--surface:#1e293b;--surface-alt:#263449;--muted:#94a3b8;--muted-soft:#94a3b8;--faint:#64748b;--given:#f1f5f9;--entry:#60a5fa;--conflict-bg:#4c1d1d;--conflict:#fca5a5;--selected-bg:#1e3a5f;--same-digit-bg:#1b2740;--line:#475569;--line-strong:#94a3b8;--ok:#4ade80;--solved-bg:#14352a;--accent:#f59e0b;--accent-soft:#422c07;--accent-strong:#fcd34d;--cage:#f59e0b;--cage-sum:#fbbf24;--fog-a:#243044;--fog-b:#2b3950;--fog-killer-a:#26324a;--fog-killer-b:#2d3b55;--peek-given-bg:#23324a;--backdrop:#020617b3}*{box-sizing:border-box;margin:0}body{background:var(--bg);color:var(--fg);justify-content:center;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;display:flex}.app{flex-direction:column;gap:12px;width:min(560px,96vw);padding:16px;display:flex}header{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px;display:flex}h1{font-size:1.3rem}.subtitle{color:var(--muted-soft);font-size:.8rem}.controls{gap:8px;display:flex}select,button{font:inherit;border:1px solid var(--line);background:var(--surface);color:inherit;cursor:pointer;touch-action:manipulation;border-radius:6px;padding:4px 10px}button:disabled{opacity:.4;cursor:default}button.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-strong);font-weight:600}.settings{flex-wrap:wrap;align-items:center;gap:16px;font-size:.9rem;display:flex}.settings label{color:var(--muted);cursor:pointer;align-items:center;gap:6px;display:flex}.settings{align-items:center;gap:8px;display:flex}.panel[hidden]{display:none}.panel{border:1px solid var(--line);background:var(--surface-alt);border-radius:8px;flex-wrap:wrap;align-items:center;gap:10px;padding:10px 12px;font-size:.85rem;display:flex}button.gear,button.theme{padding:4px 8px;line-height:1.2}button.primary:disabled{opacity:.6}.status{color:var(--muted);flex-wrap:wrap;align-items:center;gap:16px;min-height:1.4em;font-size:.9rem;display:flex}.status .peeks{color:var(--fg);font-weight:600}.status .msg{color:var(--ok);font-weight:600}.board{aspect-ratio:1;border:2px solid var(--line-strong);background:var(--surface);-webkit-user-select:none;user-select:none;grid-template-rows:repeat(9,1fr);grid-template-columns:repeat(9,1fr);width:100%;display:grid}.cell{border-right:1px solid var(--line);border-bottom:1px solid var(--line);cursor:pointer;justify-content:center;align-items:center;display:flex;position:relative}.cell:nth-child(9n){border-right:none}.cell:nth-child(n+73){border-bottom:none}.cell.thick-r{border-right:2px solid var(--line-strong)}.cell.thick-b{border-bottom:2px solid var(--line-strong)}.cell .value{color:var(--entry);font-size:clamp(16px,4.2vmin,30px)}.cell.given .value{color:var(--given);font-weight:600}.cell.selected{background:var(--selected-bg)}.cell.same-digit{background:var(--same-digit-bg)}.board.note-mode .cell.selected{background:var(--accent-soft);outline:2px dashed var(--accent);outline-offset:-2px}.status .notes-on{background:var(--accent-soft);color:var(--accent-strong);border-radius:999px;padding:2px 10px;font-weight:700}.cell.conflict{background:var(--conflict-bg)}.cell.conflict .value{color:var(--conflict)}.board.solved .cell{background:var(--solved-bg)}.cell.covered{background:repeating-linear-gradient(135deg, var(--fog-a) 0 6px, var(--fog-b) 6px 12px);cursor:zoom-in}.cell.peek-given{background:var(--peek-given-bg);cursor:zoom-in}.cell.peek-given .value{color:var(--muted)}.cell.reveal .value,.cell.reveal .notes{animation:.5s ease-in reveal-fade}@keyframes reveal-fade{0%{opacity:0}to{opacity:1}}.status .check-ok{color:var(--ok)}.status .check-bad,.status .gen-error{color:var(--conflict)}.cage-sum{color:var(--cage-sum);pointer-events:none;font-size:clamp(9px,1.6vmin,11px);font-weight:700;position:absolute;top:1px;left:3px}.board.killer .cell:after{content:"";pointer-events:none;--w:2px;--dash:5px;--gap:4px;--sum-gap:0px;--h-dash:repeating-linear-gradient(to right, var(--cage) 0 var(--dash), transparent var(--dash) calc(var(--dash) + var(--gap)));--v-dash:repeating-linear-gradient(to bottom, var(--cage) 0 var(--dash), transparent var(--dash) calc(var(--dash) + var(--gap)));background-image:var(--edge-t,none), var(--edge-b,none), var(--edge-l,none), var(--edge-r,none);background-position:var(--sum-gap) top, left bottom, left var(--sum-gap), right top;background-size:calc(100% - var(--sum-gap)) var(--w), 100% var(--w), var(--w) calc(100% - var(--sum-gap)), var(--w) 100%;background-repeat:no-repeat;position:absolute;inset:3px}.board.killer .cell.cage-t:after{--edge-t:var(--h-dash)}.board.killer .cell.cage-b:after{--edge-b:var(--h-dash)}.board.killer .cell.cage-l:after{--edge-l:var(--v-dash)}.board.killer .cell.cage-r:after{--edge-r:var(--v-dash)}.board.killer .cell.has-sum:after{--sum-gap:15px}.board.killer .cell .value{padding-top:8px}.board.killer .cell.covered{background:repeating-linear-gradient(135deg, var(--fog-killer-a) 0 6px, var(--fog-killer-b) 6px 12px)}.notes{pointer-events:none;grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(3,1fr);display:grid;position:absolute;inset:1px}.notes span{color:var(--muted-soft);justify-content:center;align-items:center;font-size:clamp(9px,1.7vmin,11px);display:flex}.pad{grid-template-columns:repeat(9,1fr);gap:6px;display:grid}.pad .actions{flex-wrap:wrap;grid-column:1/-1;gap:6px;display:flex}.help{color:var(--faint);font-size:.75rem}.stats{color:var(--muted);font-size:.8rem;font-weight:500}.overlay[hidden]{display:none}.overlay{background:var(--backdrop);z-index:10;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.sheet{background:var(--surface);border-radius:10px;width:min(640px,100%);max-height:85vh;padding:20px 24px 24px;font-size:.9rem;line-height:1.5;overflow-y:auto}.sheet-head{background:var(--surface);justify-content:space-between;align-items:center;gap:12px;padding:4px 0 8px;display:flex;position:sticky;top:-20px}.sheet h2{font-size:1.2rem}.sheet h3{color:var(--entry);margin-top:18px;font-size:.95rem}.sheet p{margin-top:6px}.sheet ul{margin:6px 0 0 18px}.sheet li{margin-top:4px}.sheet.dialog{width:min(420px,100%)}.sheet.dialog ul{margin-left:0;list-style:none}.sheet.dialog label{color:var(--muted);margin-top:12px;display:block}.dialog-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;margin-top:18px;display:flex}.share-note{color:var(--muted);word-break:break-all;min-height:1.2em;font-size:.85rem}button.primary{background:var(--entry);border-color:var(--entry);color:#fff;font-weight:600}@media (width<=480px){.app{gap:10px;width:100%;padding:8px}.pad{gap:5px}.pad>button{padding:12px 0;font-size:1.05rem}.actions button{padding:11px 14px}.controls select,.controls button,.settings select,.settings button{padding:9px 10px}.board{touch-action:manipulation}}