.sudoku-game button:focus-visible,.sudoku-game summary:focus-visible{outline:3px solid #15803d;outline-offset:2px;z-index:1}.sudoku-game .game-control{min-height:44px;border:1px solid #cbd5e1;border-radius:8px;padding:8px 12px;color:#334155;background:#fff;font-size:.875rem;font-weight:650}.sudoku-game .game-control:hover:not(:disabled){background:#f0fdf4}.sudoku-game .game-control[aria-pressed=true]{background:#dcfce7;border-color:#15803d;color:#166534}.sudoku-game button:disabled{opacity:.5;cursor:default}.game-board{border:2px solid #0f172a;background:#0f172a;width:100%;aspect-ratio:1;scroll-margin-top:90px}.game-row{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));height:calc(100% / 9)}.game-cell{min-width:0;padding:0;border-right:1px solid #cbd5e1;border-bottom:1px solid #cbd5e1;background:#fff;color:#166534;font-size:clamp(1rem,4.8vw,1.65rem);line-height:1;font-weight:500;display:flex;align-items:center;justify-content:center}.game-row:nth-child(3n):not(:last-child) .game-cell{border-bottom:2px solid #0f172a}.game-cell:nth-child(3n):not(:last-child){border-right:2px solid #0f172a}.game-cell:last-child{border-right:0}.game-row:last-child .game-cell{border-bottom:0}.game-cell[data-given=true]{color:#0f172a;font-weight:750}.game-cell[data-related=true]{background:#f0fdf4}.game-cell[data-selected=true]{background:#bbf7d0;box-shadow:inset 0 0 0 2px #15803d}.game-cell[data-error=true]{color:#991b1b;background:#fee2e2;text-decoration:underline;text-underline-offset:3px}.game-notes{width:95%;height:95%;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(3,minmax(0,1fr));color:#475569;font-size:clamp(.55rem,1.9vw,.8rem);font-weight:500;line-height:1}.game-notes span{display:flex;align-items:center;justify-content:center}.game-digit{min-height:44px;padding:0;border-radius:6px;border:1px solid #bbf7d0;background:#f0fdf4;color:#166534;font-size:1.15rem;font-weight:700}.game-paused{display:flex;min-height:300px;aspect-ratio:1;align-items:center;justify-content:center;flex-direction:column;gap:1rem;background:#f8fafc;color:#475569}.game-complete-backdrop{position:fixed;inset:0;display:grid;place-items:center;padding:1rem;background:rgb(15 23 42/.45);z-index:60}.game-complete-dialog{background:white;padding:1.5rem;border-radius:20px;max-width:28rem;max-height:90dvh;overflow-y:auto}