#z-row, #scale-z-row { display: none; }
body.mode3d #z-row, body.mode3d #scale-z-row { display: block; }
body.mode3d #hint3d { display: flex; }
#hint3d { display: none; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 4px; border: 1px solid var(--border); background: var(--surface); font-size: 14px; font-family: 'JetBrains Mono', monospace; color: var(--ink3); margin-top: 6px; }
.lc-step {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 5px;
  margin-bottom: 5px;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--ink2);
  transition: all 0.2s;
}
.lc-step-icon { font-size: 14px; line-height: 1; margin-top: 1px; }
.lc-anim-btn {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.lc-anim-btn button {
  flex: 1;
  padding: 6px 10px;
  font-size: 13px;
  border-radius: 5px;
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--ink2);
  cursor: pointer;
  transition: all 0.15s;
  font-family: 'DM Sans', sans-serif;
}
.lc-anim-btn button:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.lc-anim-btn button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}