/* Section Navigation */
.section-nav {
  position: fixed;
  top: 50%; right: 20px;
  transform: translateY(-50%);
  z-index: 999;
  display: none; /* hide at first; show on scroll */
}
.section-nav.show { display: block; }

.section-nav a {
  display: block;
  width: 18px; height: 18px;
  border-radius: 50%;
  background-color: var(--divider);
  transition: all 0.3s ease;
  text-decoration: none;
  position: relative;
}

.section-nav a:hover {
  background-color: hsla(250, 100%, 70%, 0.5);
  transform: scale(1.15);
}
.section-nav a.active {
  background-color: var(--color-primary);
  transform: scale(1.3);
}

.section-nav a::after {
  content: attr(data-title);
  position: absolute;
  padding: 4px 8px;
  top: 50%; right: 30px;
  transform: translateY(-50%);
  background-color: var(--text-primary);
  color: var(--off-black);
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.section-nav a:hover::after {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 768px) {
  .section-nav.show {
    display: none;
  }
}