.about-chapter-nav{position:sticky;top:var(--about-header-height,105px);z-index:990;background:#fffefbf7;border-bottom:1px solid #e6dbd0;backdrop-filter:blur(16px)}
.about-chapter-inner{display:flex;align-items:stretch;gap:26px}
.about-chapter-nav a{display:flex;align-items:center;gap:11px;padding:18px 15px;text-decoration:none;color:#795747;font:12px/1.5 'Noto Serif Variable',Georgia,serif;transition:color .2s,background-color .2s;white-space:nowrap}
.about-chapter-nav svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.about-chapter-nav .about-chapter-home{padding-left:0;padding-right:24px;border-right:1px solid #e6dbd0}
.about-chapter-links{display:grid;grid-template-columns:repeat(4,auto);justify-content:space-between;flex:1;gap:8px}
.about-chapter-nav a:hover,.about-chapter-nav a:focus-visible{color:#a94b5b;background:transparent;box-shadow:inset 0 -1px #a94b5b}
.about-chapter-nav a[aria-current=page]{color:#a94b5b;background:transparent;box-shadow:inset 0 -1px #a94b5b;font-weight:600}
.about-chapter-nav a:focus-visible{outline:2px solid #a94b5b;outline-offset:-3px}
html:has(.about-chapter-nav){scroll-padding-top:calc(var(--about-header-height,105px) + 80px)}
#brand-culture #culture-values{scroll-margin-top:12px}
@media(prefers-reduced-motion:reduce){.about-chapter-nav a{transition:none}}

/* Keep existing chapter links accessible without widening narrow pages. */
@media(max-width:999px){.about-chapter-nav .about-chapter-inner{overflow-x:auto;}}