body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #111;
  overflow: hidden;
  font-family: sans-serif;
}

spline-viewer {
  width: 100%;
  height: 100vh;
  display: block;
}

/* Botões invisíveis sobre a cena */
.project-button {
  position: absolute;
  padding: 0;
  margin: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

/* Tooltip */
.tooltip {
  position: absolute;
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 14px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  white-space: nowrap;
  z-index: 10;
}