.note {
    background: #CBF3BB;
    border-left: 4px solid #ffd43b;
    padding: .75rem;
    border-radius: 6px
}

.toc a {
    display: block;
    color: inherit;
    padding: .25rem 0
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: green;
  color: #fff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  
  text-decoration: none;
  font-size: 1.3rem;

  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  opacity: 0;
  pointer-events: none;
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--secondary-color);
  transform: translateY(-5px);
  box-shadow: 0 8px 18px rgba(34, 117, 67, 0.35);
}