/* AYH v5.1 brand-kit chrome for every page except the two homes (which load ayh-cro2.css).
   Same header, footer and logo as the cro-v2 homepages (DD mock rules, rescoped). Only header.nav.bk, footer.site.bk and the
   v6 intro player (.intro-video) are styled here; nothing in <main> changes. Tokens are scoped to the chrome (brand kit v1). */
header.nav.bk,footer.site.bk.bk{--bg:#FFFFFF;--ink:#1D1C1A;--ink-2:#6C6A66;--line:#E6E4DF;--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-family:var(--font);letter-spacing:normal;line-height:1.5;-webkit-font-smoothing:antialiased}
@media (prefers-color-scheme:dark){header.nav.bk,footer.site.bk.bk{--bg:#0C0B0A;--ink:#F5F4F1;--ink-2:#A3A09A;--line:#2E2C29}}
header.nav.bk img,header.nav.bk svg,footer.site.bk.bk img{display:block;max-width:100%}
header.nav.bk picture,footer.site.bk.bk picture{display:contents}
header.nav.bk a:focus-visible,header.nav.bk button:focus-visible,footer.site.bk.bk a:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px}
header.nav.bk .wrap,footer.site.bk.bk .wrap{max-width:1200px;margin:0 auto;padding:0 40px}
@media (max-width:833px){header.nav.bk .wrap,footer.site.bk.bk .wrap{padding:0 24px}}
/* header (mock .nav) */
header.nav.bk{position:sticky;top:0;z-index:50;height:52px;background:color-mix(in srgb,var(--bg) 80%,transparent);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid color-mix(in srgb,var(--line) 80%,transparent);color:var(--ink)}
header.nav.bk .wrap{height:100%;display:flex;align-items:center;gap:28px}
header.nav.bk .home{display:flex;align-items:center;min-height:44px;text-decoration:none}
header.nav.bk .logo{height:20px;width:auto}
header.nav.bk .markonly{display:none;height:26px;width:auto}
header.nav.bk .links{display:flex;align-items:center;gap:24px;margin-left:auto;font-size:14px}
header.nav.bk .links a{text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;min-height:44px}
header.nav.bk .links a:hover{text-decoration:underline}
header.nav.bk .lang{color:var(--ink-2)!important}
header.nav.bk .menu{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:none;border:0;color:var(--ink);padding:0;margin:0 -10px 0 0;cursor:pointer}
header.nav.bk .drawer{display:none}
@media (max-width:833px){
 header.nav.bk .wrap{gap:4px}
 header.nav.bk .links{gap:16px;font-size:15px}
 header.nav.bk .links .about,header.nav.bk .links .lang{display:none}
 header.nav.bk .menu{display:inline-flex}
 body.menu-open header.nav.bk .drawer{display:block;position:absolute;left:0;right:0;top:52px;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 24px 16px}
 header.nav.bk .drawer a{display:flex;align-items:center;min-height:48px;font-size:17px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line)}
 header.nav.bk .drawer a:last-child{border-bottom:0}
}
/* footer (mock footer.site); doubled class beats site.css footer.site and template-v3 html:has(main.t2) footer.site */
footer.site.bk.bk{background:var(--bg);border-top:1px solid var(--line);padding:44px 0 40px;font-size:14px;color:var(--ink-2)}
footer.site.bk.bk .row{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
footer.site.bk.bk .logo{height:20px;width:auto}
footer.site.bk.bk p{margin:0}
footer.site.bk.bk .tag{margin-top:12px;color:var(--ink-2)}
footer.site.bk.bk nav{display:flex;flex-wrap:wrap;gap:0 24px}
footer.site.bk.bk nav a{color:var(--ink-2);text-decoration:none;display:inline-flex;align-items:center;min-height:44px}
footer.site.bk.bk nav a:hover{text-decoration:underline}
footer.site.bk.bk .made{margin-top:28px;font-size:13px}
footer.site.bk.bk .made a{color:var(--ink-2);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
@media (max-width:833px){footer.site.bk.bk{padding:48px 0 40px}footer.site.bk.bk .row{flex-direction:column;gap:20px}footer.site.bk.bk nav{gap:0 20px}}
/* v6 intro player on the Beginner path pages (DD VIDEO-PLAYER-SPEC; same rules as the home). The held path layout keeps its
   .v4-vid-wrap column and spacing, so the frame fills that column instead of 960px. */
.intro-video{--line:#E6E4DF;--focus:#C2410C;position:relative;margin:0 auto;max-width:960px;aspect-ratio:16/9;background:#0C0B0A;overflow:hidden;border-radius:18px;box-shadow:0 0 0 1px var(--line),0 2px 6px rgba(0,0,0,.05),0 30px 60px -24px rgba(0,0,0,.28)}
@media (prefers-color-scheme:dark){.intro-video{--line:#2E2C29;--focus:#FF7A33;box-shadow:0 0 0 1px var(--line),0 30px 60px -24px rgba(0,0,0,.6)}}
.intro-video video{display:block;width:100%;height:100%;object-fit:cover;background:#0C0B0A;transition:filter .15s}
.intro-video.is-playing video{object-fit:contain}
.intro-video__play{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:flex-start;padding:24px;margin:0;border:0;border-radius:0;min-height:0;background:transparent;cursor:pointer;-webkit-tap-highlight-color:transparent}
.intro-video__play[hidden]{display:none}
.intro-video__play:focus{outline:none}
.intro-video__pill{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 20px 0 16px;border-radius:999px;background:rgba(255,255,255,.94);color:#1D1C1A;font:600 15px/1 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;letter-spacing:normal;transition:background .15s}
.intro-video__pill svg{display:block;flex:none;width:16px;height:16px}
.intro-video__play:hover .intro-video__pill{background:#fff}
.intro-video:not(.is-playing):hover video{filter:brightness(.92)}
.intro-video__play:focus-visible .intro-video__pill{outline:3px solid var(--focus);outline-offset:3px}
@media (max-width:768px){.intro-video{border-radius:12px}}
@media (max-width:833px){.intro-video__play{padding:16px}.intro-video__pill{height:44px}}
@media (max-width:600px){.intro-video__play{padding:12px}.intro-video__pill{height:40px;font-size:14px}}   /* v5.2.2 (DD via Steve 1:17): phone pill */
@media (prefers-reduced-motion:reduce){.intro-video video,.intro-video__pill{transition:none}}