:root,:root[data-theme=soft]{color-scheme:light;--color-background:#f7f1e8;--color-surface:#fcf8f1;--color-surface-raised:#fffaf3;--color-surface-hover:#efe7dc;--color-surface-active:#e4dacd;--color-text:#292e2b;--color-text-muted:#5a625d;--color-text-subtle:#707870;--color-text-on-accent:#fffdf8;--color-border:#d9d1c5;--color-border-strong:#888f88;--color-divider:#e2dacd;--color-accent:#5f786c;--color-accent-hover:#4e675b;--color-accent-active:#3e554a;--color-accent-subtle:#dce8df;--color-text-on-accent-subtle:#30483d;--color-secondary:#806d82;--color-secondary-hover:#6d5b70;--color-secondary-active:#59485c;--color-secondary-subtle:#eee2ef;--color-text-on-secondary:#fffafd;--color-text-on-secondary-subtle:#514154;--color-focus:#526f62;--color-selection:#dce8df;--color-danger-foreground:#934a47;--color-danger-surface:#f9e3df;--color-danger-border:#b96c65;--color-success-foreground:#477052;--color-success-surface:#deecdf;--color-success-border:#699071;--paper-cold:#fffaf3;--paper-deep:#ede5d9;--ink-soft:#3f4943;--rain-line:#b9beb7;--plum-dust:#806d82;--heading-ink:#36413b;--board-border:#626d66;--board-grid-strong:#747d77;--cell-ink:#56635c;--cell-given:#303a35;--cell-selected:#293831;--note-ink:#6f7d75;--shadow-color:#39473d18;--inset-highlight:#ffffffb8;--backdrop-color:#46504842}:root[data-theme=night]{color-scheme:dark;--color-background:#171b22;--color-surface:#202631;--color-surface-raised:#28303c;--color-surface-hover:#323b48;--color-surface-active:#3d4755;--color-text:#f2ede5;--color-text-muted:#c3bcb3;--color-text-subtle:#aaa49d;--color-text-on-accent:#17201c;--color-border:#414b58;--color-border-strong:#7b8692;--color-divider:#38424e;--color-accent:#acc9ba;--color-accent-hover:#bdd8ca;--color-accent-active:#d0e6db;--color-accent-subtle:#344a42;--color-text-on-accent-subtle:#e2f2e9;--color-secondary:#c6acd0;--color-secondary-hover:#d5bce0;--color-secondary-active:#e2ceea;--color-secondary-subtle:#493b50;--color-text-on-secondary:#211925;--color-text-on-secondary-subtle:#f3e5f7;--color-focus:#b9d7c8;--color-selection:#344a42;--color-danger-foreground:#ffb5ad;--color-danger-surface:#512f32;--color-danger-border:#d47c76;--color-success-foreground:#b7dfbe;--color-success-surface:#294333;--color-success-border:#6eaa79;--paper-cold:#202631;--paper-deep:#14181f;--ink-soft:#e9e2d9;--rain-line:#56616e;--plum-dust:#c6acd0;--heading-ink:#f3ece3;--board-border:#919ba6;--board-grid-strong:#7b8793;--cell-ink:#d5d9dc;--cell-given:#fffaf1;--cell-selected:#f1fff7;--note-ink:#aeb8c0;--shadow-color:#05070a66;--inset-highlight:#ffffff16;--backdrop-color:#080b10a6}:root[data-theme=kawaii]{color-scheme:light;--color-background:#fff3f7;--color-surface:#fff9fc;--color-surface-raised:#fffdfd;--color-surface-hover:#fbe6ef;--color-surface-active:#f4d9e6;--color-text:#3d3441;--color-text-muted:#655767;--color-text-subtle:#7d6c7a;--color-text-on-accent:#fffafd;--color-border:#ead0dd;--color-border-strong:#a77f94;--color-divider:#efd8e3;--color-accent:#a94e78;--color-accent-hover:#913d67;--color-accent-active:#792f55;--color-accent-subtle:#f5d9e7;--color-text-on-accent-subtle:#6f294c;--color-secondary:#4f8071;--color-secondary-hover:#3e6d5f;--color-secondary-active:#31594d;--color-secondary-subtle:#d9eee7;--color-text-on-secondary:#fffefd;--color-text-on-secondary-subtle:#285245;--color-focus:#99446e;--color-selection:#f5d9e7;--color-danger-foreground:#a43f59;--color-danger-surface:#ffe1e7;--color-danger-border:#cb6a7f;--color-success-foreground:#47745d;--color-success-surface:#ddf1e7;--color-success-border:#6c9e85;--paper-cold:#fffafd;--paper-deep:#f8e4ed;--ink-soft:#584658;--rain-line:#d6b9c9;--plum-dust:#a94e78;--heading-ink:#564354;--board-border:#806677;--board-grid-strong:#9d7f91;--cell-ink:#665269;--cell-given:#463647;--cell-selected:#592d47;--note-ink:#806b7d;--shadow-color:#713e5a1c;--inset-highlight:#ffffffc9;--backdrop-color:#76546445}:root{--sudoku-board-border-width:2px;--sudoku-board-radius:7px;--sudoku-board-radius-compact:4px;--sudoku-selection-outline-inset:4px;--sudoku-selection-outline-width:1px;color:var(--color-text);background:var(--paper-deep);font-synthesis:none;text-rendering:optimizelegibility;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe 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svg{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2px;width:100%;height:100%}.kawaii-decor-paw{opacity:.25;width:42px;height:42px;top:15%;right:43%;transform:rotate(-13deg)}.kawaii-decor-candy{opacity:.3;width:36px;height:36px;bottom:10%;right:3%;transform:rotate(11deg)}.kawaii-decor-dino{opacity:.24;width:70px;height:70px;bottom:8%;left:1%}.kawaii-dinosaur path:first-child{fill:var(--color-secondary-subtle)}.difficulty-list{border-top:1px solid var(--color-border-strong);align-self:center}.difficulty-list button{border:0;border-bottom:1px solid var(--color-divider);text-align:left;background:0 0;grid-template-columns:34px 105px minmax(0,1fr);align-items:center;gap:12px;width:100%;min-height:76px;padding:0 4px;transition:padding .18s,background .18s;display:grid}.difficulty-list button:hover{background:color-mix(in oklab, var(--color-surface) 72%, transparent);padding-left:12px;padding-right:12px}.difficulty-list 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button{min-height:28px;color:var(--color-text-on-accent);background:var(--color-accent);border:0;border-radius:4px;padding:0 10px;font-size:9px}:root[data-theme=kawaii] .brand-mark,:root[data-theme=kawaii] .number-pad button,:root[data-theme=kawaii] .hint-card{border-radius:11px}:root[data-theme=kawaii] .tool-row button,:root[data-theme=kawaii] .hint-card>button:not(.close-hint){border-radius:9px}:root[data-theme=kawaii] .sheet-dialog{border-radius:17px}:root[data-theme=kawaii]{--sudoku-board-radius:11px;--sudoku-board-radius-compact:8px}@keyframes drift-spin{to{transform:rotate(360deg)}}@media (width<=760px){.welcome{flex-direction:column;min-height:100dvh;padding:23px 21px 18px;display:flex}.welcome-copy{padding:clamp(54px,10vh,90px) 0 42px}.welcome-copy h1{font-size:clamp(48px,15vw,66px)}.difficulty-list{margin-bottom:35px}.difficulty-list button{grid-template-columns:29px 88px minmax(0,1fr);min-height:65px}.difficulty-list strong{font-size:17px}.welcome 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