* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "montserrat", sans-serif;
}

html {
  scroll-behavior: smooth;
}

#back-btn {
  position: sticky;
  top: 5%;
  left: 5%;
  z-index: 1000;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  padding: clamp(5px, 1vw, 8px);
  font-size: clamp(0.8rem, 3vw, 0.9rem);
  color: var(--text-color2);
  background-color: var(--secondary-color);
  box-shadow: 0 4px 6px var(--shadow);
  opacity: 0.75;
}
#back-btn:hover {
  background-color: var(--primary-color);
  color: var(--text-color1);
  opacity: 1;
}

#back-to-top {
  position: fixed;
  bottom: 5%;
  right: 5%;
  border: none;
  border-radius: 50%;
  font-size: 3rem;
  cursor: pointer;
}