/* Nurikabe (Øer) */
.nurikabe .cell { cursor: pointer; border-color: #c3cad3; font-weight: 700; }
.nurikabe .cell.clue { cursor: default; }
.nurikabe .cell.sea { background: #1f4e79; border-color: #2c6396; }
.nurikabe .cell.dot::after { content: ''; width: 22%; aspect-ratio: 1; border-radius: 50%; background: #5b6672; }
.nurikabe .cell.done { background: #e2f1df; }
.nurikabe .cell.bad { background: #fbdcdc; color: var(--bad); }
.nurikabe .cell.dot.bad::after { background: var(--bad); }
.nurikabe .cell.sea.bad { background: #c0392b; border-color: #a93226; }
.nurikabe:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.nurikabe:focus-visible .cell.cursor { box-shadow: inset 0 0 0 3px var(--accent); }
.nurikabe:focus-visible .cell.sea.cursor { box-shadow: inset 0 0 0 3px #9cc8f2; }