.section-header{position:sticky;top:0;z-index:100;background:var(--ground,var(--color-bone,#FFFFFF));border-bottom:1px solid var(--rule,#DDE3EB)}
.section-header-inner{max-width:1040px;margin:auto;padding:14px 24px;display:grid;grid-template-columns:auto 1fr auto;gap:30px;align-items:center}
.section-brand{display:inline-flex;align-items:center;gap:10px;color:var(--text,#172B46);text-decoration:none;white-space:nowrap;font-family:var(--sans,ui-sans-serif,system-ui,Arial,sans-serif);font-size:22px;font-weight:750;letter-spacing:-.8px;min-height:44px}
.section-brand .brand-mark{width:32px;height:32px;flex:none}.section-brand .brand-lab{font-weight:400}
.section-book{grid-column:3;grid-row:1;display:inline-flex;justify-content:center;align-items:center;gap:12px;min-height:44px;padding:10px 18px;background:var(--accent,#2348cb);color:var(--accent-ink,#FFFFFF)!important;text-decoration:none;font:600 14px var(--sans,ui-sans-serif,system-ui,Arial,sans-serif);border-radius:3px;white-space:nowrap}
.section-navigation{grid-column:2;grid-row:1;display:flex;justify-content:center;gap:6px;min-width:0}
.section-navigation a{display:inline-flex;align-items:center;min-height:44px;font:600 15px var(--sans,ui-sans-serif,system-ui,Arial,sans-serif);letter-spacing:-.005em;white-space:nowrap;text-decoration:none;color:var(--text,#172B46);padding:0 12px;border-radius:4px;position:relative}
.section-navigation a::after{content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;background:var(--accent,#2348cb);transform:scaleX(0);transform-origin:center;transition:transform .18s ease}
.section-navigation a:hover{color:var(--accent,#2348cb)}
.section-navigation a[aria-current=location]{color:var(--accent,#2348cb)}
.section-navigation a:hover::after,.section-navigation a[aria-current=location]::after{transform:scaleX(1)}
.section-header a:focus-visible{outline:3px solid var(--accent,#2348cb);outline-offset:2px}
@media(max-width:860px){
  .section-header-inner{grid-template-columns:1fr auto;gap:4px 16px;padding:10px 0 0;position:relative}
  .section-brand{padding-left:20px}.section-book{grid-column:2;margin-right:20px;padding:10px 16px;font-size:14px}
  .section-navigation{grid-column:1/-1;grid-row:2;justify-content:flex-start;gap:4px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;overscroll-behavior-x:contain;scroll-snap-type:x proximity;scroll-padding-inline:20px;padding:2px 20px 0;-webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 44px),transparent);mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 44px),transparent)}
  .section-navigation::-webkit-scrollbar{display:none}
  .section-navigation a{font-size:16px;flex:none;min-height:48px;padding:0 12px;scroll-snap-align:start;border-radius:0}
  .section-navigation a::after{bottom:0;left:12px;right:12px}
  .section-brand{font-size:20px}
}
@media(max-width:380px){.section-brand{font-size:18px;padding-left:16px}.section-book{margin-right:16px;padding-inline:12px}.section-navigation{padding-inline:16px;scroll-padding-inline:16px}.section-navigation a{font-size:15px;padding:0 10px}}
@media(prefers-reduced-motion:reduce){.section-navigation a::after{transition:none}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
:target{scroll-margin-top:140px}