(function () {
  'use strict';

  if (window.__DBC_ABOUT_R11_REFINEMENT__) return;
  window.__DBC_ABOUT_R11_REFINEMENT__ = true;

  const allowedAnchors = new Set([
    'overview',
    'company-profile',
    'scope',
    'business-network',
    'evidence',
    'routes'
  ]);

  function isAboutR11() {
    return document.body?.dataset.v7318AboutLayout === 'scope-footer-r11';
  }

  function currentAnchor() {
    const id = decodeURIComponent(window.location.hash.replace(/^#/, ''));
    return allowedAnchors.has(id) ? document.getElementById(id) : null;
  }

  let settleTimer = 0;

  function alignAnchor(markReady) {
    if (!isAboutR11()) return;
    const shellReady = document.body.dataset.v7301SharedShell === 'active';
    const target = currentAnchor();
    if (!target) {
      if (markReady && shellReady) document.body.dataset.v7318AnchorReady = 'true';
      return;
    }
    window.requestAnimationFrame(function () {
      window.requestAnimationFrame(function () {
        const root = document.documentElement;
        const previousScrollBehavior = root.style.getPropertyValue('scroll-behavior');
        const previousScrollPriority = root.style.getPropertyPriority('scroll-behavior');
        root.style.setProperty('scroll-behavior', 'auto', 'important');
        target.scrollIntoView({ block: 'start', inline: 'nearest', behavior: 'instant' });
        window.requestAnimationFrame(function () {
          const header = document.querySelector('.site-header');
          const headerBox = header?.getBoundingClientRect();
          const headerPosition = header ? getComputedStyle(header).position : 'static';
          const headerIsVisible = Boolean(headerBox
            && ['fixed', 'sticky'].includes(headerPosition)
            && headerBox.top >= -1
            && headerBox.bottom > 0);
          const desiredTop = headerIsVisible ? headerBox.bottom : 0;
          const delta = target.getBoundingClientRect().top - desiredTop;
          if (Math.abs(delta) > 1) window.scrollBy({ top: delta, left: 0, behavior: 'instant' });
          if (previousScrollBehavior) root.style.setProperty('scroll-behavior', previousScrollBehavior, previousScrollPriority);
          else root.style.removeProperty('scroll-behavior');
          if (markReady && shellReady) document.body.dataset.v7318AnchorReady = 'true';
        });
      });
    });
  }

  function refineFooterContactTone() {
    if (!isAboutR11()) return;
    document.querySelectorAll('.formal-site-footer .v7301-footer-identity__copy a').forEach(function (link) {
      link.style.setProperty('color', 'rgba(235, 243, 247, .74)', 'important');
      link.style.setProperty('-webkit-text-fill-color', 'rgba(235, 243, 247, .74)', 'important');
    });
  }

  function settle() {
    refineFooterContactTone();
    alignAnchor(false);
    window.clearTimeout(settleTimer);
    settleTimer = window.setTimeout(function () {
      refineFooterContactTone();
      alignAnchor(true);
    }, 180);
  }

  function init() {
    if (!isAboutR11()) return;
    settle();

    const observer = new MutationObserver(function () {
      if (document.body.dataset.v7301SharedShell !== 'active') return;
      refineFooterContactTone();
      settle();
      observer.disconnect();
    });
    observer.observe(document.body, { attributes: true, attributeFilter: ['data-v7301-shared-shell'] });

    window.addEventListener('load', settle, { once: true });
    window.addEventListener('hashchange', settle);
    document.addEventListener('dbc:languagechange', settle);
  }

  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init, { once: true });
  else init();
})();