#board{display:grid;grid-template-columns:repeat(5,minmax(44px,1fr));grid-template-rows:repeat(5,1fr);gap:0;width:min(100%,296px);aspect-ratio:1}.str8ts-cell{min-width:44px;min-height:44px;padding:0;border:1px solid var(--line);border-radius:0;font-size:1.4rem;touch-action:manipulation;background:var(--surface);color:var(--text)}.str8ts-cell.black{background:#0f172a;color:#fff;border-color:#64748b}.str8ts-cell.given{font-weight:800;text-decoration:underline;text-underline-offset:4px}.str8ts-cell.selected{box-shadow:none;outline:2px solid #2563eb;outline-offset:-5px}.str8ts-cell.error{text-decoration:underline wavy var(--error);text-underline-offset:4px}.str8ts-cell.black.error{text-decoration-color:#fca5a5}.str8ts-cell:disabled{opacity:1}.input-row{gap:4px;width:min(100%,296px);margin-top:10px}#numbers{--count:5;gap:4px}#numbers button,.erase-button{min-width:44px;min-height:44px;padding:0}.play-actions{grid-template-columns:repeat(3,1fr);max-width:296px}