/* Scoped game styles: the surrounding page owns its card, dialog, and branding. */
.sudoku-game{max-width:510px;margin-inline:auto;color:var(--ink,#272923)}
.sudoku-rules{font-size:13px;line-height:1.7;margin:8px 0 16px;color:var(--muted,#696b60)}
.sudoku-rules strong{color:var(--ink,#272923)}
.sudoku-summary{display:flex;justify-content:space-between;gap:12px;font-size:11px;line-height:1.5;margin:0 0 11px}
.sudoku-board{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));width:100%;max-width:450px;margin-inline:auto;border:2px solid var(--ink,#272923);border-radius:6px;overflow:hidden;background:var(--ink,#272923)}
.sudoku-board.sudoku-size-4{grid-template-columns:repeat(4,minmax(0,1fr));max-width:320px}
.sudoku-game .sudoku-cell{position:relative;display:grid;place-items:center;min-width:0;min-height:0;aspect-ratio:1;padding:0;border:0;border-right:1px solid #c8cbbd;border-bottom:1px solid #c8cbbd;border-radius:0;background:var(--paper,#fffdf8);color:#2a506e;font-size:clamp(18px,5vw,28px);line-height:1;font-weight:500;touch-action:manipulation}
.sudoku-game .sudoku-size-4 .sudoku-cell{font-size:30px}
.sudoku-game .sudoku-box-bottom{border-bottom:2px solid var(--ink,#272923)}
.sudoku-game .sudoku-box-right{border-right:2px solid var(--ink,#272923)}
.sudoku-game .sudoku-given{font-weight:800;background:#edeee3;color:var(--ink,#272923);cursor:pointer}
.sudoku-game .sudoku-same-number{background:#eef2e0}
.sudoku-game .sudoku-selected{background:var(--lime,#d7ed8a);box-shadow:inset 0 0 0 2px #557237;z-index:1}
.sudoku-game .sudoku-invalid{color:#8c3025;background:#f8e0d6;text-decoration:underline;text-decoration-style:wavy;text-decoration-thickness:1px;text-underline-offset:4px}
.sudoku-game .sudoku-invalid.sudoku-selected{background:#f5d4c7}
.sudoku-game .sudoku-cell:focus-visible{outline:3px solid #315f9f;outline-offset:-4px;z-index:2}
.sudoku-notes{position:absolute;inset:3px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(3,minmax(0,1fr));font-size:clamp(8px,2.1vw,11px);font-weight:500;color:#4b5966}
.sudoku-notes>span{display:grid;place-items:center;line-height:1}
.sudoku-size-4 .sudoku-notes{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));font-size:14px;inset:8px}
.sudoku-selection{font-size:11px;line-height:1.5;margin:12px 0;text-align:center;min-height:17px}
.sudoku-number-pad{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;margin:12px 0}
.sudoku-number-pad button{flex:0 0 44px;min-width:44px;min-height:44px;border:1px solid #9aa987;border-radius:7px;background:#eef2e0;color:var(--ink,#272923);font-size:21px;font-weight:700}
.sudoku-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:16px}
.sudoku-actions button,.sudoku-reset button{min-height:44px;padding:9px 13px;border:1px solid #b6bca9;border-radius:7px;background:var(--paper,#fffdf8);font-size:11px;font-weight:600;line-height:1.4}
.sudoku-game button:hover:not(:disabled){filter:brightness(.96)}
.sudoku-game button:disabled{opacity:.45;cursor:default}
.sudoku-actions button[aria-pressed="true"]{background:var(--lime,#d7ed8a);border-color:#557237}
.sudoku-reset{margin:14px 0;padding:14px;border:1px solid #b5ad96;border-radius:8px;background:#f5edda}
.sudoku-reset[hidden]{display:none}
.sudoku-reset p{font-size:12px;line-height:1.6;margin:0 0 10px}
.sudoku-reset button{margin:0 8px 0 0}
.sudoku-status{font-size:12px;line-height:1.65;min-height:40px;text-align:center;margin:17px 0 12px;color:#465b34}
.sudoku-finish{width:100%;min-height:46px;justify-content:center}
.sudoku-help,.sudoku-collection{font-size:10px;line-height:1.7;color:var(--muted,#696b60);text-align:center;margin:15px 0 0}
.sudoku-collection{margin-top:8px;font-size:9px}
@media(max-width:400px){.sudoku-rules{font-size:12px}.sudoku-number-pad{gap:6px}.sudoku-actions{gap:6px}.sudoku-actions button{padding-inline:10px}.sudoku-notes{inset:2px}.sudoku-summary{font-size:10px}.sudoku-selection{font-size:10px}}
@media(forced-colors:active){.sudoku-game .sudoku-selected{outline:3px solid Highlight;outline-offset:-4px}.sudoku-game .sudoku-invalid{outline:1px dashed Mark;outline-offset:-2px}.sudoku-game .sudoku-given{font-weight:900}.sudoku-game button:disabled{opacity:1}}