/* Shared acquisition CTA only: original MARK, navigation and page content retained. */
.site-header .mobile-menu:not([open]) nav{display:none}
.site-header .header-book{background:#f97849;color:#20251c;border:1px solid #20251c;box-shadow:3px 3px 0 #20251c;min-height:52px;gap:22px;white-space:nowrap}
.site-header .header-book:hover{background:#f58a62;box-shadow:1px 1px 0 #20251c;transform:translate(2px,2px)}
@media(max-width:799px){.site-header{gap:10px}.site-header .header-book{display:inline-flex;margin-left:auto;font-size:10px;min-height:44px;padding:8px;gap:8px}.site-header .mobile-menu{margin-left:0}.site-header .mobile-menu summary{gap:0}.site-header .mobile-menu summary>span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.site-header .brand{font-size:12px;letter-spacing:2px;gap:7px}}
@media(prefers-reduced-motion:reduce){.site-header .header-book:hover{transform:none}}