/* Consistent styling for navigation buttons at the top of pages. */
header.site-header .nav a,
header.topbar .calculator-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 0;
  border-radius: 10px;
  background: #f4f8fa;
  color: var(--navy);
  font-size: .875rem;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(11, 60, 93, .18);
  transition: background .2s, box-shadow .2s;
}
header.site-header .nav a:hover,
header.topbar .calculator-nav a:hover {
  background: #eaf3f5;
  box-shadow: 0 3px 8px rgba(11, 60, 93, .22);
}
header.site-header .nav a:focus-visible,
header.topbar .calculator-nav a:focus-visible {
  outline: 3px solid #00a8a8;
  outline-offset: 4px;
}
@media (max-width: 640px) {
  header.site-header .nav a,
  header.topbar .calculator-nav a { padding: 8px 10px; }
}