.btn-custom {
  color: #fff;
  border: none;
  border-radius: 10px;
  box-shadow: 3px 3px 6px #b3b3b3;
  padding: 0.5rem 1.25rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.btn-custom:hover {
  box-shadow: 4px 4px 8px #a3a3a3;
  color: #fff;
}
.btn-custom:active {
  background-color: #0b5566;
  box-shadow: 1px 1px 3px #333;
}
.btn-custom-primary{
  background-color: #12829B;
}
.btn-custom-primary:hover{
  background-color: #0e697e;
}
.btn-custom-primary:active{
  background-color: #0b5566;
}
.btn-custom-secondary{
  background-color: #649b12;
}
.btn-custom-secondary:hover{
  background-color: #578710;
}
.btn-custom-secondary:active{
  background-color: #578710;
}
.btn-outline-custom-secondary {
  background-color: #8f8f8f;
  border-color: #e3e3e3;
}
.btn-outline-custom-secondary:hover {
  background-color: #757575;
}
.btn-outline-custom-secondary:active{
  background-color: #757575;
}

/* ── Menú 3 niveles ─────────────────────────────────── */
.dropdown-submenu {
  position: relative;
}
.dropdown-submenu > .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -1px;
  display: none;
}
.dropdown-submenu:hover > .dropdown-menu {
  display: block;
}
/* Flecha indicadora del submenú */
.dropdown-submenu > a.dropdown-toggle::after {
  border-top: 0.3em solid transparent;
  border-bottom: 0.3em solid transparent;
  border-left: 0.3em solid;
  border-right: 0;
  vertical-align: middle;
  margin-left: auto;
  float: right;
  margin-top: 0.5em;
}