header nav a[aria-current="page"]:after,header nav a[data-active-section="true"]:after,header nav .nav-group.is-expanded .nav-parent>a:after{transform:scaleX(1)}
.nav-group{position:relative}.nav-parent{display:flex;align-items:center;gap:5px}.nav-expand{display:grid;place-items:center;width:22px;height:28px;padding:0;border:0;background:transparent;color:inherit;cursor:pointer}.nav-expand svg{transition:transform .2s}.is-expanded>.nav-parent .nav-expand svg{transform:rotate(180deg)}
header nav .nav-submenu{position:absolute;top:100%;left:-18px;min-width:180px;padding:22px 18px 18px;display:flex;flex-direction:column;gap:22px;background:#e6f8f2;color:#092b4c;border-radius:0 0 12px 12px;box-shadow:0 15px 20px #092b4c12;animation:submenu-in .18s ease-out}
header nav .nav-submenu[hidden]{display:none}.impact-header nav .nav-submenu{background:#123953;color:#23e0b5}header nav .nav-submenu a{width:fit-content;line-height:1.4}.nav-expand:focus-visible{outline:2px solid currentColor;outline-offset:2px}
@keyframes submenu-in{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1000px){.nav-parent{justify-content:space-between}.nav-expand{width:36px;height:32px}header nav .nav-submenu{position:static;box-shadow:none;padding:15px 18px;margin-top:10px;border-left:1px solid currentColor;border-radius:0;background:transparent;color:inherit}}
@media(prefers-reduced-motion:reduce){header nav .nav-submenu{animation:none}.nav-expand svg{transition:none}}
.unified-header nav a[aria-current="page"]:after,.unified-header nav a[data-active-section="true"]:after,.unified-header nav .nav-group.is-expanded .nav-parent>a:after{transform:scaleX(1)}
/* Dropdowns use the same surface and ink as the page header. */
header{--menu-surface:#fff;--menu-text:#092b4c}.opening>header{--menu-surface:#23e0b5;--menu-text:#092b4c}.impact-header{--menu-surface:#092b4c;--menu-text:#23e0b5}
header nav .nav-submenu,.impact-header nav .nav-submenu{background:var(--menu-surface);color:var(--menu-text);border:1px solid color-mix(in srgb,var(--menu-text) 15%,transparent);box-shadow:0 14px 25px #092b4c12}
header nav .nav-submenu a:not([aria-current="page"]):after{transform:scaleX(0)!important}header nav .nav-submenu a{ text-decoration:none!important;transition:opacity .2s}header nav .nav-submenu a:hover{opacity:.65}header nav .nav-submenu a[aria-current="page"]:after{transform:scaleX(1)}
@media(max-width:1000px){.unified-header nav,.impact-header nav{background:var(--menu-surface);color:var(--menu-text)}header nav .nav-submenu{box-shadow:none;border:0;border-left:1px solid color-mix(in srgb,var(--menu-text) 25%,transparent)}}

/* Keep dropdown surfaces opaque and above header dividers. */
header .nav-group{z-index:10}header nav .nav-submenu{z-index:20;opacity:1;animation:none;isolation:isolate;background:var(--menu-surface,#fff)!important;backdrop-filter:none}