/* ===== Scroll tlačítko s kruhovým indikátorem ===== */
#scrollProgressButton {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
  border: none;
  padding: 0;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

#scrollProgressButton svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

#scrollProgressButton svg circle {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
}

#scrollProgressButton .circle-bg {
  stroke: rgba(0, 0, 0, 0.1);
}

#scrollProgressButton .circle-progress {
  stroke: #ff0002;
  transition: stroke-dashoffset 0.3s ease-out;
}

#scrollProgressButton img {
  width: 40%;
  height: 40%;
  object-fit: contain;
  z-index: 1;
  pointer-events: none;
}