/* Replaces only site-level navigation; lesson and game controls remain visible. */
.rsn-shared-header header.header-default,.rsn-shared-header header.header-transparent,.rsn-shared-header .rs-preview>.rs-nav{display:none!important}
body:has(#rsn-standalone-marker)>header:not(#rs-site-header){display:none!important}
#rs-site-header{--rsn-bg:#faf7f2;--rsn-ink:#242329;--rsn-accent:#276c77;--rsn-line:#e2ddd5;display:block;position:relative;z-index:50;width:100%;padding:0;margin:0;background:var(--rsn-bg);color:var(--rsn-ink);border:0;border-bottom:1px solid var(--rsn-line);font:500 16px/1.4 Arial,sans-serif;box-sizing:border-box}
#rs-site-header *{box-sizing:border-box}
#rs-site-header .rsn-inner{max-width:1240px;min-height:90px;margin:0 auto;padding:18px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px}
#rs-site-header a{color:var(--rsn-ink);text-decoration:none;margin:0;letter-spacing:normal;white-space:nowrap}
#rs-site-header .rsn-brand{font:700 29px/1.2 Georgia,serif;letter-spacing:-1px;flex-shrink:0}
#rs-site-header .rsn-brand span{display:inline;font:inherit;letter-spacing:inherit;color:var(--rsn-accent);margin:0}
#rs-site-navigation{display:flex;align-items:center;justify-content:flex-end;gap:24px;flex:1}
#rs-site-header .rsn-links,#rs-site-header .rsn-actions{display:flex;align-items:center;gap:22px}
#rs-site-header .rsn-links>a{display:inline-flex;align-items:center;min-height:44px;font:600 14px/1.4 Arial,sans-serif;border-bottom:2px solid transparent;padding:8px 0}
#rs-site-header .rsn-links>a[aria-current]{color:var(--rsn-accent);border-bottom-color:var(--rsn-accent)}
#rs-site-header .rsn-links>a:hover{color:var(--rsn-accent);text-decoration:underline;text-underline-offset:5px}
#rs-site-header .rsn-links>.rsn-learning{background:#efad88;color:#242329;border:2px solid transparent;border-radius:24px;padding:10px 18px}
#rs-site-header .rsn-links>.rsn-learning:hover{background:#f6c4a9;color:#242329}
#rs-site-header .rsn-links>.rsn-learning[aria-current]{border-color:var(--rsn-accent);color:#242329}
#rs-site-header .rsn-actions{gap:14px}
#rs-site-header .rsn-cart{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;gap:6px;font-size:14px}
#rs-site-header .rsn-cart svg{flex-shrink:0}
#rs-site-header .rsn-menu-toggle{display:none;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:9px 13px;border:1px solid var(--rsn-line);border-radius:10px;background:transparent;color:var(--rsn-ink);font:600 14px/1.4 Arial,sans-serif;cursor:pointer}
#rs-site-header :is(a,button):focus-visible{outline:3px solid var(--rsn-accent);outline-offset:4px}
#rs-site-header #rsn-appearance:empty{display:none}
#rs-site-header #rs-theme-toggle{font:500 14px/1.3 Arial,sans-serif;white-space:nowrap}
html[data-rs-theme="dark"] #rs-site-header{--rsn-bg:#17232c;--rsn-ink:#edf3f6;--rsn-accent:#9ddfdf;--rsn-line:#40525f}
@media(max-width:1050px){
 #rs-site-header .rsn-inner{flex-wrap:wrap;gap:14px;padding:16px 24px;min-height:78px}
 #rs-site-header.rsn-ready .rsn-menu-toggle{display:inline-flex}
 #rs-site-navigation{flex-basis:100%;flex-direction:column;align-items:stretch;gap:14px;padding:10px 0 4px}
 #rs-site-header.rsn-ready #rs-site-navigation:not(.rsn-open){display:none}
 #rs-site-header .rsn-links{flex-direction:column;align-items:stretch;gap:4px}
 #rs-site-header .rsn-links>a{padding:11px 14px;border-radius:8px}
 #rs-site-header .rsn-links>a[aria-current]:not(.rsn-learning){background:color-mix(in srgb,var(--rsn-accent) 12%,transparent)}
 #rs-site-header .rsn-links>.rsn-learning{justify-content:center;margin-top:6px;border-radius:24px}
 #rs-site-header .rsn-actions{justify-content:space-between;border-top:1px solid var(--rsn-line);padding-top:12px}
}
@media(max-width:420px){#rs-site-header .rsn-inner{padding:14px 18px}#rs-site-header .rsn-brand{font-size:27px}}
@media print{#rs-site-header{display:none!important}}