#scrollToTopBtn {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
  font-size: 30px;
  width: 58px;
  height: 58px;
  border: none;
  outline: none;
  color: white;
  background-color: #fff;
  border: 2px solid var(--color-primary);
  cursor: pointer;
  padding: 10px;
  border-radius: 50%;
  opacity: 0;
  visibility: hidden;
  transition: all 400ms ease-out;
  text-decoration: none;
  position: relative;
  right: 0;
  bottom: 0;
}
#scrollToTopBtn::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -20px;
  width: 72px;
  height: 22px;
  background-image: url("../img/static/scroll-to-top-btn-shadow.png");
}
#scrollToTopBtn > span {
  font-size: 34px;color: var(--color-light);
}
#scrollToTopBtn.show {
  opacity: 0.7;
  visibility: visible;
  transform: translateY(calc(-68px));
}
#scrollToTopBtn:hover {
  opacity: 1;
}
@media (max-width: 1440px) {
  #scrollToTopBtn {
    width: 48px;
    height: 48px;
    /* right: 18px; */
  }
  #scrollToTopBtn > span {
    font-size: 26px;
  }

  #scrollToTopBtn.show {transform: translateY(calc(-56px));}
}
@media (max-width: 991px) {
  #scrollToTopBtn {
    /* right: 15px; */
    width: 43px;
    height: 43px;
  }
  #scrollToTopBtn.show {transform: translateY(calc(-50px));}
  #scrollToTopBtn::before {
    width: 50px;
  }
  #scrollToTopBtn > span {
    font-size: 26px;
  }
}
@media (max-width: 575px) {
  #scrollToTopBtn {
    width: 43px;
    height: 43px;
  }
  #scrollToTopBtn > span {
    font-size: 20px;
    position: relative;
  }
}