.sidebar {
  width: 140px;
  background: #fff;
  box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 8px;
  flex-shrink: 0;
}

.sidebar a {
  display: flex;
  align-items: center;
  padding: 6px 4px;
  gap: 6px;
  text-decoration: none;
  color: #333;
  font-size: 14px;
}

.sidebar a:hover {
  background: #eef2f7;
}

.sidebar h4 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 600;
  color: #0078D7;
}

.sidebar .grupo {
  border-bottom: 2px groove #444;
  padding-bottom: 5px;
  margin-bottom: 5px;
}

.icon-principal {
  width: 22px;
  height: 22px;
  object-fit: contain;
  opacity: 0.95;
  margin-right: 8px;
}

.icon-secundario {
  width: 18px;
  height: 18px;
  object-fit: contain;
  opacity: 0.95;
  margin-right: 8px;
}

.sidebar {
  width: 140px;
  background: #fff;
  box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;

  position: sticky;
  top: 8px;

  max-height: calc(100vh - 16px); /* altura visible */
  overflow-y: auto;               /* activa scroll vertical */
}