.game-sudoku{max-width:460px;margin:0 auto;text-align:center;font-family:-apple-system,"Segoe UI",Roboto,"Microsoft JhengHei",sans-serif;}
.title-sudoku{font-size:1.5rem;margin:0 0 12px;}
.bar-sudoku{display:flex;gap:14px;align-items:center;justify-content:center;margin-bottom:12px;flex-wrap:wrap;}
.bar-sudoku select{padding:6px 8px;border:1px solid #d0d0d0;border-radius:6px;}
.bar-sudoku #new-sudoku{padding:8px 18px;border:none;border-radius:8px;background:#2563eb;color:#fff;cursor:pointer;}
.grid-wrap-sudoku{display:flex;justify-content:center;}
.grid-sudoku{display:grid;grid-template-columns:repeat(9,1fr);width:100%;max-width:414px;aspect-ratio:1/1;border:3px solid #1e293b;background:#1e293b;gap:1px;}
.cell-sudoku{background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.25rem;cursor:pointer;user-select:none;}
.cell-sudoku.fixed{background:#eef2f7;font-weight:700;color:#111;}
.cell-sudoku.sel{background:#bfdbfe;}
.cell-sudoku.same{background:#dbeafe;}
.cell-sudoku.err{color:#dc2626;}
.cell-sudoku.br{border-right:2px solid #1e293b;}
.cell-sudoku.bb{border-bottom:2px solid #1e293b;}
.pad-num-sudoku{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;max-width:414px;margin:14px auto 0;}
.pad-num-sudoku button{padding:12px 0;font-size:1.1rem;border:1px solid #cbd5e1;background:#f8fafc;border-radius:8px;cursor:pointer;}
.pad-num-sudoku button:active{background:#e2e8f0;}
.btn-row-sudoku{display:flex;gap:8px;justify-content:center;margin-top:14px;flex-wrap:wrap;}
.btn-row-sudoku button{padding:9px 18px;border:none;border-radius:8px;background:#2563eb;color:#fff;cursor:pointer;}
.btn-row-sudoku button.secondary-sudoku{background:#eef0f3;color:#333;}
.msg-sudoku{min-height:24px;margin-top:10px;font-size:.95rem;color:#444;}
.msg-sudoku.ok{color:#16a34a;}.msg-sudoku.bad{color:#dc2626;}