/* Shared navigation: keep utility links identical on every page. */
:root{--nav-text:#4A5060;--nav-hover:#16191F;--nav-focus:#1F4FB4}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){--nav-text:#B4B9C6;--nav-hover:#EEEFEA;--nav-focus:#7FA4F0}}
:root[data-theme="dark"]{--nav-text:#B4B9C6;--nav-hover:#EEEFEA;--nav-focus:#7FA4F0}
.back-home,footer a,.foot a{
  font-family:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  font-size:15px;font-weight:400;line-height:1.55;letter-spacing:normal;
  color:var(--nav-text);text-decoration:underline;text-underline-offset:3px;
}
.back-home:visited,footer a:visited,.foot a:visited{color:var(--nav-text)}
.back-home:hover,footer a:hover,.foot a:hover{color:var(--nav-hover);text-decoration-thickness:2px}
.back-home:focus-visible,footer a:focus-visible,.foot a:focus-visible{outline:2px solid var(--nav-focus);outline-offset:4px;border-radius:2px}
.page-top .mark{display:flex;align-items:baseline;gap:.45em;text-decoration:none;margin-bottom:0}
.page-top .mark b{font-family:"Bricolage Grotesque","Helvetica Neue",Arial,sans-serif;font-size:1.3rem;font-weight:700;letter-spacing:-.02em}
.page-top .mark span{font-family:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;font-size:.85rem;color:var(--nav-text)}