.section-nav {
  --sn-height: 56px;
  position: sticky;
  top: var(--saas-header-height, 72px);
  z-index: 850;
  background: var(--saas-bg, #FFFFFF);
  border-bottom: 1px solid transparent;
  /* Only `transform` is animated — see the note on the header-follow rule. */
  transition: transform .3s var(--saas-ease, cubic-bezier(.22, .61, .36, 1));
}

.dnd-section:has(.section-nav) {
  position: sticky;
  top: var(--saas-header-height, 72px);
  z-index: 850;
}

body:has(.site-header.is-hidden) .section-nav {
  transform: translate3d(0, calc(-1 * var(--saas-header-height, 72px)), 0);
}

/* -- Bar background -------------------------------------------------------- */

.section-nav.is-bg-alt { background: var(--saas-bg-alt, #F5F3EE); }

.section-nav.is-bg-dark { background: var(--saas-ink, #0E1A24); }

.section-nav.is-bg-translucent {
  background: var(--saas-bg, #FFFFFF);
  background: rgba(var(--saas-bg-rgb, 255, 255, 255), .82);
}
@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .section-nav.is-bg-translucent {
    -webkit-backdrop-filter: saturate(170%) blur(12px);
    backdrop-filter: saturate(170%) blur(12px);
  }
}

/* Dark bar: recolour the rail's own parts. `.on-dark` in main.css handles the
   button and generic text, but the label, hairlines and link states are local. */
.section-nav.is-bg-dark .section-nav__label {
  color: var(--saas-on-dark-faint, rgba(255, 255, 255, .52));
  border-right-color: var(--saas-dark-border, rgba(255, 255, 255, .14));
}
.section-nav.is-bg-dark .section-nav__link { color: var(--saas-on-dark-muted, rgba(255, 255, 255, .72)); }
.section-nav.is-bg-dark .section-nav__link:hover { color: var(--saas-on-dark, #FFFFFF); }
.section-nav.is-bg-dark .section-nav__link.is-active { color: var(--saas-on-dark, #FFFFFF); }
/* The primary green does not carry enough contrast as a 2px marker on the ink
   surface, so the dark bar marks the active link with the accent instead. */
.section-nav.is-bg-dark .section-nav__link::after { background: var(--saas-accent, #FF6B4A); }
.section-nav.is-bg-dark .section-nav__link.is-active {
  background: transparent;
  border-color: var(--saas-dark-border, rgba(255, 255, 255, .14));
}
.section-nav.is-bg-dark.is-hairline,
.section-nav.is-bg-dark.is-shadow { border-bottom-color: var(--saas-dark-border, rgba(255, 255, 255, .14)); }

@media (prefers-reduced-motion: reduce) {
  .section-nav { transition: none; }
}

.section-nav.is-hairline { border-bottom-color: var(--saas-border); }

.section-nav.is-shadow {
  border-bottom-color: var(--saas-border);
  box-shadow: 0 6px 20px rgba(var(--saas-ink-rgb), .06);
}

.section-nav.is-borderless { border-bottom-color: transparent; }

.section-nav__inner {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.6vw, 34px);
  min-height: var(--sn-height);
}

/* -- Page label ------------------------------------------------------------ */

.section-nav__label {
  flex: none;
  display: inline-flex;
  align-items: center;
  height: 20px;
  margin: 0;
  padding-right: clamp(16px, 2.6vw, 34px);
  border-right: 1px solid var(--saas-border);
  font-family: var(--saas-font-eyebrow);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--saas-muted);
  white-space: nowrap;
}

/* -- Links ----------------------------------------------------------------- */

.section-nav__scroll {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -webkit-mask-image: linear-gradient(to right, transparent 0, rgba(var(--saas-ink-rgb), 1) 20px, rgba(var(--saas-ink-rgb), 1) calc(100% - 20px), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, rgba(var(--saas-ink-rgb), 1) 20px, rgba(var(--saas-ink-rgb), 1) calc(100% - 20px), transparent 100%);
}
.section-nav__scroll::-webkit-scrollbar { display: none; }

.section-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, .5vw, 8px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.section-nav__list li { margin: 0; }

.section-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: var(--sn-height);
  padding-inline: clamp(8px, 1vw, 13px);
  color: var(--saas-nav-link);
  font-size: .94rem;
  font-weight: 500;
  letter-spacing: -.005em;
  white-space: nowrap;
  transition: color var(--saas-speed) var(--saas-ease);
}

.section-nav__link:hover { color: var(--saas-nav-link-hover); }

/* The scroll container clips anything bleeding past its box, so the marker
   sits inside the link rather than straddling the bar's bottom border. */
.section-nav__link::after {
  content: "";
  position: absolute;
  left: clamp(8px, 1vw, 13px);
  right: clamp(8px, 1vw, 13px);
  bottom: 0;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--saas-primary);
  opacity: 0;
  transform: scaleX(.35);
  transition:
    opacity var(--saas-speed) var(--saas-ease),
    transform .28s var(--saas-ease);
}

.section-nav__link.is-active {
  color: var(--saas-primary);
}

.section-nav__link.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

/* -- Action ---------------------------------------------------------------- */

.section-nav__actions {
  flex: none;
  display: flex;
  align-items: center;
}

html:has(.section-nav) {
  scroll-padding-top: calc(var(--saas-header-height) + 56px + 20px);
}

/* -- Responsive ------------------------------------------------------------ */

@media (max-width: 991px) {
  .section-nav { --sn-height: 52px; }
  .section-nav__label { font-size: 10px; letter-spacing: .1em; }
}

@media (max-width: 767px) {
  .section-nav.is-hidden-mobile { display: none; }

  .section-nav__inner { min-height: 0; gap: 0; }

  /* No room for furniture — the rail becomes a chip row on its own. */
  .section-nav__label,
  .section-nav__actions { display: none; }

  .section-nav__scroll {
    margin-inline: calc(var(--saas-gutter) * -1);
    padding: 10px var(--saas-gutter);
    -webkit-mask-image: linear-gradient(to right, transparent 0, rgba(var(--saas-ink-rgb), 1) 16px, rgba(var(--saas-ink-rgb), 1) calc(100% - 16px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0, rgba(var(--saas-ink-rgb), 1) 16px, rgba(var(--saas-ink-rgb), 1) calc(100% - 16px), transparent 100%);
  }

  .section-nav__list { gap: 8px; }

  .section-nav__link {
    height: auto;
    padding: 8px 15px;
    border: 1px solid var(--saas-border);
    border-radius: 999px;
    background: var(--saas-bg);
    color: var(--saas-heading);
    font-size: .88rem;
  }

  .section-nav__link::after { display: none; }

  .section-nav__link.is-active {
    background: var(--saas-primary-tint);
    border-color: rgba(var(--saas-primary-rgb), .35);
    color: var(--saas-primary);
  }

  html:has(.section-nav) {
    scroll-padding-top: calc(var(--saas-header-height) + 52px + 16px);
  }

  html:has(.section-nav.is-hidden-mobile) {
    scroll-padding-top: calc(var(--saas-header-height) + 24px);
  }
}