html { scroll-behavior: smooth; }

.function-nav {
  position: sticky;
  top: 68px;
  z-index: 4;
  max-width: 100%;
  border-bottom: 1px solid rgba(23, 35, 31, .12);
  background: rgba(244, 243, 237, .94);
  box-shadow: 0 8px 24px rgba(23, 35, 31, .07);
  backdrop-filter: blur(12px);
}

.function-nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 8px 24px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.function-nav a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  min-height: 54px;
  padding: 7px 8px;
  border-radius: 6px;
  color: var(--ink);
  text-decoration: none;
  transition: background-color .18s ease, color .18s ease;
}

.function-nav a > span {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--green);
  font-size: 9px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.function-nav a strong {
  min-width: 0;
  font-size: 10px;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.function-nav a:hover {
  background: rgba(22, 92, 71, .08);
}

.function-nav a[aria-current="location"] {
  background: var(--green);
  color: white;
}

.function-nav a[aria-current="location"] > span {
  border-color: var(--lime);
  background: var(--lime);
  color: var(--ink);
}

#capacityAssessment,
#deliveryMigration,
#lifecycleTool,
#networkCalculator,
#aiAdvisor {
  scroll-margin-top: 150px;
}

@media (max-width: 900px) {
  .function-nav-inner {
    display: flex;
    overflow-x: auto;
    gap: 7px;
    padding-block: 7px;
    scroll-snap-type: x proximity;
    scrollbar-color: #9eaaa4 transparent;
    scrollbar-width: thin;
  }

  .function-nav a {
    flex: 0 0 205px;
    min-height: 50px;
    scroll-snap-align: start;
  }

  .function-nav a strong { font-size: 10px; }
}

@media (max-width: 480px) {
  .function-nav-inner { padding-inline: 16px; }
  .function-nav a { flex-basis: 184px; }
  #capacityAssessment,
  #deliveryMigration,
  #lifecycleTool,
  #networkCalculator,
  #aiAdvisor { scroll-margin-top: 144px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  .function-nav { display: none; }
}