.sub-nav {
  display: flex;
  justify-content: center;
  background: #f8f9fa;
  border-bottom: 2px solid #ddd;
  padding: 10px 0;
  margin-bottom: 20px;
}

.sub-link {
  margin: 0 15px;
  padding: 8px 15px;
  text-decoration: none;
  color: #333;
  font-weight: 500;
  border-radius: 5px;
  transition: 0.3s;
}

.sub-link:hover {
  background: #e6f2ff;
  color: #007bff;
}

.sub-link.active {
  background: #007bff;
  color: #fff;
}

.sub-link.active {
  background: #007bff;
  color: #fff;
  border-radius: 5px;
}
.sub-link.active i {
  color: #fff;
}

.sub-nav {
  display: flex;
  gap: 0.75rem;
  padding: 1rem;
  background: white;
  border-radius: 1rem;
}

.sub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5em 1em 0.5em 1em;
  background: linear-gradient(135deg, #ffffff 0%, #ffffff 100%);
  color: rgb(0, 0, 0);
  text-decoration: none;
  border-radius: 0.75rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  opacity: 0.7;
  border: 1px solid #555;
}

.sub-link:hover {
  opacity: 1;
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(71, 85, 105, 0.3);
}

.sub-link.active {
  opacity: 1;
  background: linear-gradient(135deg, #5383d2 0%, #6d45bf 100%);
  box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}