/* === Base typography === */
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:wght@400;600&display=swap');

body {
  font-family: 'Source Sans Pro', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.55;
  color: #0a0a0a;
}

/* === Section wrapper === */
.industry-selector {
  max-width: 940px;
  margin: 3rem auto;
  padding: 0 1rem;
}

.industry-selector h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  font-weight: 600;
}

/* === Dropdown component === */
.dropdown {
  position: relative;
  display: block;
  margin-bottom: 1.2rem;
}

.dropdown-btn {
  width: 100%;
  background-color: #e7e7e7;
  color: #000000;
  border: none;
  border-radius: 4px;
  padding: 0.9rem 1.2rem;
  font-size: 1.05rem;
  text-align: left;
  cursor: pointer;
  transition: background 0.25s ease;
}

.dropdown-btn:hover,
.dropdown-btn[aria-expanded="true"] {
  background-color: #093251;
  color: #ffffff;
}

/* Sub-menu */
.dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: #ffffff;
  border: 1px solid #e2e2e2;
  border-top: none;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 6px 14px rgba(0,0,0,0.08);
}

.dropdown-menu.show {
  max-height: 1550px; /* large enough for any list */
}

.dropdown-menu li {
  border-bottom: 1px solid #f2f2f2;
}

.dropdown-menu li:last-child {
  border-bottom: none;
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: #061E2F;
  font-size: 0.97rem;
  text-decoration: none;
  transition: background 0.18s ease;
}

.dropdown-menu a:hover {
  background: #f4f7fb;
}

/* Responsive */
@media (max-width: 480px) {
  .industry-selector h2 {
    font-size: 1.55rem;
  }
  .dropdown-btn {
    font-size: 1rem;
  }
}