.galaxy-board{position:relative;width:min(100%,296px);aspect-ratio:1;margin:auto}#board{display:grid;grid-template-columns:repeat(4,minmax(44px,1fr));grid-template-rows:repeat(4,1fr);gap:0;width:100%;height:100%;border:0;outline:3px solid var(--text);outline-offset:-1.5px}.galaxy-cell{min-width:44px;min-height:44px;padding:0;border:1px solid var(--line);border-radius:0;touch-action:manipulation}.galaxy-cell.selected{box-shadow:none;outline:2px solid #2563eb;outline-offset:-6px}#lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.wall{stroke:var(--text);stroke-width:1.5}.wall.error{stroke:var(--error)}.galaxy-center{fill:var(--text);stroke:var(--surface);stroke-width:.6}.center-number{fill:var(--surface);font-size:3.8px;text-anchor:middle;dominant-baseline:central}.unknown-mark,.open-mark{fill:var(--muted);font-size:4px;text-anchor:middle;dominant-baseline:central}.open-mark{fill:#2563eb}.mark-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:10px auto;max-width:360px}.mark-controls button{min-width:44px;padding:4px;font-size:.9rem}.play-actions{grid-template-columns:repeat(3,1fr)}