.site-header{position:sticky;top:0;z-index:50;background:var(--paper,#f5f3ee);color:var(--ink,#171714);transition:transform .28s ease,box-shadow .28s ease;will-change:transform}.site-header.is-scroll-hidden{transform:translateY(-102%)}
.platform-nav{height:78px;display:flex;align-items:center;justify-content:space-between;width:min(92vw,1440px);margin:auto;border-bottom:1px solid rgba(23,23,20,.18);gap:1.4rem}.site-brand img{display:block;width:145px;height:auto}.platform-links{display:flex;align-items:center;gap:clamp(1rem,2.3vw,2.2rem)}
.platform-links a,.header-action{color:inherit;text-decoration:none;font:500 .75rem/1.2 Inter,Arial,sans-serif;letter-spacing:.12em;text-transform:uppercase;white-space:nowrap}.platform-links a:hover,.platform-links a:focus-visible,.header-socials a:hover,.header-socials a:focus-visible,.header-action:hover,.header-action:focus-visible{color:var(--accent,#775c3e)}.platform-links a[aria-current="page"]{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:7px}
.header-socials,.mobile-socials{display:flex;align-items:center;gap:.8rem}.header-socials{margin-left:auto}.header-socials a,.mobile-socials a{display:grid;place-items:center;color:inherit}.header-socials svg,.mobile-socials svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.header-socials .fill,.mobile-socials .fill{fill:currentColor;stroke:none}.header-action{border-left:1px solid rgba(23,23,20,.18);padding-left:1.4rem}.menu-toggle,.mobile-navigation{display:none}.vh-visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header a:focus-visible,.site-header button:focus-visible{outline:2px solid currentColor;outline-offset:5px}
@media(max-width:980px){.platform-links{gap:1rem}.header-socials{display:none}}
@media(max-width:760px){.platform-nav{height:64px}.site-brand img{width:120px}.platform-links,.header-action{display:none}.menu-toggle{display:flex;margin-left:auto;width:42px;height:42px;border:0;background:transparent;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:inherit}.menu-toggle span:not(.vh-visually-hidden){width:22px;height:1px;background:currentColor}.mobile-navigation{padding:1.5rem 4vw 2rem;border-bottom:1px solid rgba(23,23,20,.18)}.mobile-navigation[hidden]{display:none}.mobile-navigation:not([hidden]){display:block}.mobile-navigation nav{display:flex;flex-direction:column}.mobile-navigation nav a{padding:.85rem 0;color:inherit;text-decoration:none;font:400 1.35rem Playfair Display,Georgia,serif;border-bottom:1px solid rgba(23,23,20,.12)}.mobile-socials{padding-top:1.5rem;gap:1.25rem}.mobile-socials svg{width:19px;height:19px}}

/* Public content contract: shared accessibility and rhythm tokens. */
:root{--vh-space-xs:.5rem;--vh-space-sm:1rem;--vh-space-md:clamp(1.5rem,3vw,2.5rem);--vh-space-lg:clamp(2.5rem,5vw,5rem);--vh-space-section:clamp(4rem,8vw,7.5rem);--vh-page-top:clamp(3rem,6vw,6rem);--vh-content-wide:min(84rem,92vw);--vh-ink:#171714;--vh-paper:#f5f3ee;--vh-accent:#775c3e}
.vh-skip{position:fixed;top:.75rem;left:.75rem;z-index:1000;transform:translateY(calc(-100% - 2rem));padding:.8rem 1rem;background:var(--vh-ink);color:#fff!important;border:1px solid #fff;text-decoration:none!important;font:600 .75rem/1 Inter,Arial,sans-serif;letter-spacing:.08em;text-transform:uppercase;box-shadow:0 4px 18px rgba(0,0,0,.18);transition:transform .16s ease}
.vh-skip:focus,.vh-skip:focus-visible{transform:translateY(0);outline:2px solid var(--vh-accent);outline-offset:3px}
@media(prefers-reduced-motion:reduce){.vh-skip,.site-header{transition:none}}

/* The canonical header participates in document flow; legacy fixed-nav offsets must not stack. */
@media(max-width:767px){.site-header + .page-wrapper,.site-header ~ .page-wrapper{padding-top:0!important}}

/* Mobile navigation is an overlay, not an in-flow panel hidden by legacy menu rules. */
@media(max-width:760px){
.site-header{position:relative;z-index:100}.menu-toggle{width:44px;height:44px;cursor:pointer}.mobile-navigation{position:absolute;top:100%;left:0;right:0;z-index:101;box-sizing:border-box;max-height:calc(100dvh - 64px);overflow-y:auto;overscroll-behavior:contain;background:var(--paper,#f5f3ee);box-shadow:0 18px 30px rgba(23,23,20,.12)}.mobile-navigation[hidden]{display:none!important}.mobile-navigation:not([hidden]){display:block!important}.mobile-menu-open{overflow:hidden}.menu-toggle span:not(.vh-visually-hidden){transition:transform .2s,opacity .2s}.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}}
.site-header{position:sticky;top:0}