.nm-board {
  width: min(92vw, 340px);
  margin: 12px auto;
  aspect-ratio: 1 / 1;
}
.nm-board svg { width: 100%; height: 100%; display: block; }
.nm-pt { cursor: pointer; }
.nm-pt:hover circle { stroke-width: 3; }
.nm-line { stroke: var(--ink); stroke-width: 2; opacity: 0.45; }
.nm-dot { fill: var(--card); stroke: var(--ink); stroke-width: 2; }
.nm-dot.p1 { fill: #ff6b6b; stroke: #b03a3a; }
.nm-dot.p2 { fill: #4d96ff; stroke: #2c5fb3; }
.nm-dot.sel { stroke: #ffd93d; stroke-width: 4; }
.nm-dot.rm { stroke: #6bcb77; stroke-width: 4; }