.plan-trip-wrapper {
  position: relative;
  display: inline-block;
}

.plan-trip-btn {
  display: inline-block;
  padding: 12px 20px;
  background: #0066cc;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 600;
}

.plan-trip-btn:hover {
  background: #004d99;
}

/* dropdown */
.plan-trip-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  width: 250px;
  padding: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  border-radius: 5px;
  z-index: 9999;
}

/* show on hover */
.plan-trip-wrapper:hover .plan-trip-dropdown {
  display: block;
}