/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Arial", sans-serif;
  color: #1a1a1a;
  background-color: #f2f4f7;
}

#scrollTopBtn {
  opacity: 0;
  pointer-events: none;
  display: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99;
  border: 2px solid rgba(255, 255, 255, 0.2); /* ✅ Heller Rand */
  outline: none;
  background-color: #333;
  color: white;
  cursor: pointer;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease, border 0.3s ease;
  box-shadow: none; /* ✅ Kein dunkler Schatten */
}

#scrollTopBtn.visible {
  opacity: 1;
  pointer-events: auto;
}

#scrollTopBtn:hover {
  background-color: #555;
  border-color: rgba(255, 255, 255, 0.4);
}