button {
  width: 150px;
  height: 40px;
  background-color: #666;
  color: #fff;
  border: none;
  /* border-radius: 20px; Half of the height for rounded corners */
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease-in-out;
}

button:hover {
  background-color: #333;
}

#toTopBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 24px;
  color: var(--tertiary-color); /* font color */
  background-color: var(--secondary-color); /* bg color */
  width: 40px;
  height: 40px;
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: opacity 0.3s ease-in-out;
  z-index: 9999;
  -webkit-appearance: none; /* Add this line */
  -webkit-border-radius: 50%;
}

#toTopBtn span {
  font-size: 24px; /* Adjust the font size as needed */
  line-height: 1;
}

#toTopBtn:hover {
  opacity: 0.7;
}