/* ---------- Smooth Scroll ---------- */
html {
  scroll-behavior: smooth;
}

/* ---------- Back to TOC Button ---------- */
#backToTop {
  position: fixed;
  bottom: 20px;        /* distance from bottom */
  right: 20px;         /* distance from right */
  z-index: 999;        /* on top of everything */
  display: inline-block;
  padding: 10px 15px;  /* button size */
  border-radius: 50px; /* rounded pill */
  font-size: 14px;
  text-decoration: none; /* remove underline */
  background-color: #0d6efd; /* Bootstrap primary blue */
  color: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: background-color 0.3s, transform 0.2s;
}

/* Hover effect */
#backToTop:hover {
  background-color: #0056b3; /* darker blue */
  transform: translateY(-2px); /* subtle lift */
}