main [data-section-label] {
  scroll-margin-top: 112px;
}

.section-navigation {
  position: fixed;
  right: 20px;
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.section-navigation-panel {
  order: -1;
  padding-bottom: 10px;
}

.section-navigation-panel nav {
  width: 256px;
  max-width: calc(100vw - 40px);
  max-height: calc(100dvh - 180px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 8px;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 36px rgba(15, 23, 42, .16);
  animation: section-reveal .16s ease-out;
}

.section-navigation-panel a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  color: #334155;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.section-navigation-panel a:hover,
.section-navigation-panel a:focus-visible {
  background: #eff6ff;
  color: #2563eb;
}

.section-navigation button {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 13px 18px;
  border: 1px solid #334155;
  border-radius: 999px;
  background: #0f172a;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(15, 23, 42, .2);
}

.section-navigation button:hover { background: #1e293b; }
.section-navigation :focus-visible { outline: 3px solid #2563eb; outline-offset: 3px; }
.section-navigation button svg { transition: transform .16s; }
.section-navigation button[aria-expanded="true"] svg { transform: rotate(180deg); }

@keyframes section-reveal {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .section-navigation-panel nav { animation: none; }
  .section-navigation button svg { transition: none; }
}