/* Header/Navigation Styles */

.header {
  background-color: var(--white);
  padding: 15px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid #e8e9eb;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 auto;
  padding: 0 55px;
}

.left-container {
  display: flex;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  max-height: 112px;
}

.logo:hover {
  opacity: 0.7;
}

.nav-menu {
  display: flex;
  flex-flow: row wrap;
  row-gap: 10px;
  justify-content: center;
  list-style: none;
  gap: 10px;
  align-items: center;
  margin: 0 150px 0 60px;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--green-text);
  font-weight: 400;
  transition: color 0.3s;
  display: block;
  padding: 3px 10px;
  white-space: nowrap;
  text-decoration: none;
  background-color: transparent;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--green-text);
  opacity: 0.7;
}

.dropdown-arrow {
  width: 8px;
  height: 8px;
  fill: var(--green-text);
}

.dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--white);
  border: 1px solid #e8e9eb;
  list-style: none;
  padding: 15px 0;
  min-width: 220px;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  z-index: 1000;
}

.nav-menu.active .dropdown-menu {
  border: none;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu li {
  padding: 0;
}

.dropdown-menu a {
  display: block;
  padding: 8px 20px;
  color: var(--green-text);
  transition: background-color 0.3s, color 0.3s;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  background-color: transparent;
}

.dropdown-menu a:hover {
  background-color: var(--light-gray);
  color: var(--green-text);
}

.dropdown-header {
  font-weight: 700;
  color: var(--green-text);
  list-style: none;
}

/* Multi-column dropdowns */
.dropdown-columns {
  display: flex;
  min-width: 600px;
  padding: 20px;
  gap: 30px;
}

.dropdown-column {
  min-width: 180px;
}

.dropdown-column li {
  list-style: none;
}

.dropdown-column .dropdown-header {
  margin-bottom: 5px;
  border-bottom: 1px solid var(--border-gray);
}

.dropdown-column a {
  padding: 6px 0;
}

.dropdown-column .dropdown-header a {
  padding: 0;
  margin-bottom: 5px;
}

/* Absolute positioning (Customers) */
.nav-menu li.nav-item:nth-child(3) > .dropdown-menu {
  position: absolute;
  left: -229px;
}

/* Single wide column dropdown (Research) */
.dropdown-single-column {
  min-width: 500px;
}

/* Absolute positioning (Research) */
.nav-menu li.nav-item:nth-child(4) > .dropdown-menu {
  position: absolute;
  left: -350px;
}

.dropdown-single-column .dropdown-header {
  font-weight: 700;
  color: var(--green-text);
  margin-top: 10px;
  border-top: 1px solid var(--border-gray);
}

.dropdown-single-column .dropdown-header:first-child {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

/* News dropdown headers styling */
.dropdown-menu .dropdown-header:not(:first-child) {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border-gray);
}

/* Absolute positioning (News) */
.nav-menu li.nav-item:nth-child(5) > .dropdown-menu {
  position: absolute;
  left: -460px;
}

/* Disable all dropdown absolute positioning on mobile */
.nav-menu.active > li.nav-item > .dropdown-menu {
  position: static;
}

.dropdown-menu .dropdown-header:first-child {
  padding-top: 0;
}

.nav-icons {
  display: flex;
  gap: 12px;
  font-size: 14px;
  padding-left: 6px;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--green-text);
}

.mobile-menu-toggle .close {
  display: none;
}

.mobile-menu-toggle.active .hamburger {
  display: none;
}

.mobile-menu-toggle.active .close {
  display: inline;
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--white);
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    align-items: flex-start;
  }

  .nav-menu.active {
    display: flex;
    margin: 0;
  }

  .nav-menu.active .dropdown-single-column li a {
    text-wrap: wrap;
  }

  li.nav-item:nth-child(5) > ul:nth-child(2) > li a {
    text-wrap: wrap;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .mobile-menu-toggle:hover {
    opacity: 0.7;
  }

  .hamburger {
    width: 20px;
    fill: var(--green-text);
  }

  .close {
    width: 20px;
    fill: var(--green-text);
  }

  .nav-item {
    width: 100%;
  }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    padding-left: 20px;
    margin-top: 5px;
    opacity: 1;
    visibility: visible;
  }

  .dropdown .dropdown-menu {
    display: none;
  }

  .dropdown.active .dropdown-menu {
    display: block;
  }

  .dropdown-columns {
    flex-direction: column;
    min-width: auto;
    padding: 10px 0;
    gap: 15px;
  }

  .dropdown-column {
    min-width: auto;
  }

  .dropdown-column .dropdown-header {
    padding-left: 20px;
  }

  .dropdown-column a {
    padding: 6px 20px;
  }

  .dropdown-single-column {
    min-width: auto;
    max-width: none;
  }
}