/* ==========================================================================
   Mega Menu — Gates Foundation Style
   ========================================================================== */

/* --------------------------------------------------------------------------
   Desktop: Panel & Layout
   -------------------------------------------------------------------------- */

.primary-menu .has-mega-menu {
  position: static;
}

.has-mega-menu > a {
  position: relative;
}

/* Dropdown chevron */
.has-mega-menu > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  vertical-align: middle;
  transition: transform 0.3s ease;
}

.has-mega-menu.mega-open > a::after {
  transform: rotate(180deg);
}

/* Active underline on open */
.has-mega-menu.mega-open > a {
  border-bottom: 2px solid var(--color-black);
  padding-bottom: 2px;
}

/* Gradient background floods the entire header when mega menu is open — desktop only */
@media screen and (min-width: 1025px) {
  .site-header:has(.mega-open) {
    background: var(--gradient-blue-orange);
    transition: background 0.3s ease;
  }
}

/* Full-width panel */
.mega-menu-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--gradient-blue-orange);
  padding: 48px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  z-index: 200;
}

.has-mega-menu.mega-open > .mega-menu-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Inner container — matches site container width */
.mega-menu-inner {
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 60px;
}

/* Columns grid */
.mega-menu-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

/* --------------------------------------------------------------------------
   Description Column (first column)
   -------------------------------------------------------------------------- */

.mega-menu-description {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 280px;
}

.mega-menu-section-title {
  font-family: var(--font-primary);
  font-size: clamp(24px, 1.5625vw, 30px);
  font-weight: var(--font-weight-bold);
  color: var(--color-black);
  margin: 0;
  line-height: var(--line-height-snug);
}

.mega-menu-description p {
  font-family: var(--font-primary);
  font-size: clamp(14px, 0.8333vw, 16px);
  font-weight: var(--font-weight-regular);
  color: var(--color-black);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

.mega-menu-cta {
  font-family: var(--font-primary);
  font-size: clamp(14px, 0.8333vw, 16px);
  font-weight: var(--font-weight-semibold);
  color: var(--color-black);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.3s ease;
}

.primary-menu .mega-menu-cta:hover {
  color: var(--color-red);
}

/* --------------------------------------------------------------------------
   Link Columns
   -------------------------------------------------------------------------- */

.mega-menu-column {
  min-width: 0;
}

.mega-menu-column-title {
  font-family: var(--font-primary);
  font-size: clamp(14px, 0.9375vw, 18px);
  font-weight: var(--font-weight-bold);
  color: var(--color-black);
  margin: 0 0 16px;
  line-height: var(--line-height-snug);
}

/* Reset Underscores dropdown styles (.main-navigation ul ul) that
   push nested <ul> off-screen with position:absolute; left:-999em */
.main-navigation .mega-menu-links {
  display: block;
  position: static;
  left: auto;
  float: none;
  box-shadow: none;
  background: transparent;
  list-style: none;
  margin: 0;
  padding: 0;
  width: auto;
  z-index: auto;
}

.mega-menu-links li {
  margin: 0;
}

.primary-menu .mega-menu-links a {
  display: block;
  font-family: var(--font-primary);
  font-size: clamp(14px, 0.8333vw, 16px);
  font-weight: var(--font-weight-regular);
  color: #000;
  text-decoration: none;
  padding: 6px 0;
  transition: color 0.3s ease;
  line-height: var(--line-height-relaxed);
}

.primary-menu .mega-menu-links a:hover {
  color: var(--color-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Hidden Until Launch
   -------------------------------------------------------------------------- */

.mega-hidden {
  display: none !important;
}

/* Show hidden items with reduced opacity in Customizer preview */
.customize-partial-edit-shortcuts-shown .mega-hidden {
  display: block !important;
  opacity: 0.4;
}

/* --------------------------------------------------------------------------
   Mobile (≤768px): Accordion inside hamburger menu
   -------------------------------------------------------------------------- */

@media screen and (max-width: 1024px) {
  .primary-menu .has-mega-menu {
    position: relative;
  }

  .mega-menu-panel {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .has-mega-menu.mega-open > .mega-menu-panel {
    max-height: 2000px;
    border-top: 1px solid #fff;
    padding-top: 20px;
  }

  .mega-menu-inner {
    padding: 0;
  }

  .mega-menu-columns {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .mega-menu-description h3,
  .mega-menu-description p {
    display: none;
  }

  .mega-menu-cta {
    font-size: 14px;
  }

  .mega-menu-column-title {
    font-size: 16px;
    color: var(--color-white);
    margin-bottom: 8px;
  }

  .primary-menu .mega-menu-links a,
  .primary-menu .mega-menu-links a:visited {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    padding: 4px 0;
  }

  .primary-menu .mega-menu-links a:hover {
    color: var(--color-white);
  }

  /* Chevron color for mobile */
  .has-mega-menu > a::after {
    border-top-color: var(--color-white);
  }

  .has-mega-menu.mega-open > a {
    border-bottom: none;
    padding-bottom: 0;
  }
}