.nn9-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.nn9-diff-row {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.nn9-diff-btn {
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
}
.nn9-diff-btn[aria-pressed="true"] {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}

.nn9-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1;
  border: 3px solid var(--color-text);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-border);
  gap: 1px;
}

.nn9-cell {
  background: var(--color-surface);
  color: var(--color-text);
  border: none;
  font-size: clamp(0.9rem, 3.4vw, 1.3rem);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  aspect-ratio: 1 / 1;
}
.nn9-cell:disabled { cursor: default; }
.nn9-cell--given { color: var(--color-text); font-weight: 800; background: rgba(126,231,135,0.06); }
.nn9-cell--peer { background: rgba(79,216,224,0.08); }
.nn9-cell--match { color: var(--color-primary); }
.nn9-cell--selected { background: rgba(79,216,224,0.28); }
.nn9-cell--wrong { background: rgba(239,83,80,0.35); color: #ff8a80; }
.nn9-cell--boxleft { box-shadow: inset 2px 0 0 var(--color-text); }
.nn9-cell--boxtop { box-shadow: inset 0 2px 0 var(--color-text); }
.nn9-cell--boxleft.nn9-cell--boxtop { box-shadow: inset 2px 0 0 var(--color-text), inset 0 2px 0 var(--color-text); }

.nn9-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  max-width: 380px;
}
.nn9-num-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.05rem;
  cursor: pointer;
}
.nn9-num-btn:hover { border-color: var(--color-primary); }
.nn9-num-btn--erase { background: rgba(239,83,80,0.15); }