.sudoku{background:var(--bg-app);width:100%;height:100%;min-height:0;color:var(--text-primary);font-family:var(--font-body);-webkit-user-select:none;user-select:none;--sd-color-1:#0072b2;--sd-color-2:#e69f00;--sd-color-3:#009e73;--sd-color-4:#d55e00;--sd-color-5:#56b4e9;--sd-color-6:#cc79a7;--sd-color-7:#f0e442;--sd-color-8:#5a5a5a;--sd-color-9:#7b3294;--sd-ink-1:#fafafa;--sd-ink-2:#111;--sd-ink-3:#111;--sd-ink-4:#111;--sd-ink-5:#111;--sd-ink-6:#111;--sd-ink-7:#111;--sd-ink-8:#fafafa;--sd-ink-9:#fafafa;flex-direction:column;justify-content:flex-start;align-items:center;padding:16px 12px 24px;display:flex;overflow-y:auto}[data-theme=dark] .sudoku{--sd-color-1:#0876b4;--sd-color-3:#0da37a;--sd-color-4:#d7660d;--sd-color-8:#a8a8a8;--sd-color-9:#86429d;--sd-ink-8:#111}.sd-visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.sd-updating{font-family:var(--font-mono);color:var(--text-muted);padding:4px 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var(--border);cursor:pointer;min-height:44px;font-family:var(--font-body);text-align:left;box-shadow:var(--card-shadow);border-radius:8px;flex-direction:column;align-items:flex-start;gap:3px;padding:14px;transition:border-color .15s,transform .1s;display:flex}.sd-difficulty-btn:hover{border-color:var(--accent)}.sd-difficulty-btn:active{transform:scale(.98)}.sd-difficulty-btn__name{color:var(--text-primary);font-size:15px;font-weight:700}.sd-difficulty-btn--easy .sd-difficulty-btn__name{color:var(--color-success)}.sd-difficulty-btn--medium .sd-difficulty-btn__name{color:var(--accent)}.sd-difficulty-btn--hard .sd-difficulty-btn__name{color:var(--color-warning)}.sd-difficulty-btn--expert .sd-difficulty-btn__name{color:var(--color-error)}.sd-difficulty-btn__desc{color:var(--text-muted);font-size:11.5px;line-height:1.35}.sd-install-btn{border:1px dashed var(--border);color:var(--text-secondary);font-family:var(--font-mono);letter-spacing:.06em;cursor:pointer;background:0 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var(--border);color:var(--text-secondary);font-family:var(--font-mono);letter-spacing:.06em;cursor:pointer;background:0 0;border-radius:6px;min-height:44px;margin-top:10px;padding:9px 16px;font-size:11px;transition:color .15s,border-color .15s}.sd-records-link:hover{color:var(--accent);border-color:var(--accent)}.sd-play{flex-direction:column;align-items:center;gap:12px;width:100%;max-width:480px;display:flex}.sd-topbar{flex-wrap:wrap;align-items:center;gap:8px;width:100%;display:flex}.sd-topbar-btn{border:1px solid var(--border);color:var(--text-secondary);font-family:var(--font-body);cursor:pointer;background:0 0;border-radius:6px;min-height:34px;padding:6px 10px;font-size:12px;transition:color .15s,border-color .15s}.sd-topbar-btn:hover{color:var(--text-primary);border-color:var(--text-muted)}.sd-badge{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;background:color-mix(in srgb, var(--accent) 12%, 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