/* Bouton + popover */
.lumise-top-nav li[data-tool="eraser"] { position: relative; }
.lumise-top-nav li[data-tool="eraser"] .btn { display:inline-flex; align-items:center; gap:.35rem; }
.lumise-eraser-popover {
  position:absolute; top:100%; left:0; margin-top:.4rem;
  background:#111; color:#fff; padding:.5rem .7rem; border-radius:.5rem;
  font:500 12px/1.2 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  box-shadow:0 10px 30px rgba(0,0,0,.25); display:none; z-index:99999;
}
.lumise-eraser-popover.show { display:block; }
.lumise-eraser-popover input[type=range]{ width:160px; }

/* Curseur DOM rond */
#lum-eraser-cursor {
  position: fixed;
  left: 0; top: 0;
  border: 2px solid #00e7ff;
  border-radius: 50%;
  pointer-events: none;
  z-index: 2147483647;
  transform: translate(-50%,-50%);
  mix-blend-mode: difference;
}