header>nav{overflow:visible;gap:24px;align-items:center}.learn-menu{position:relative}.learn-menu summary{cursor:pointer;display:flex;align-items:center;gap:7px;list-style:none;font-size:14px;font-weight:600;color:var(--muted);padding:22px 0;border-bottom:2px solid transparent}.learn-menu summary::-webkit-details-marker{display:none}.learn-menu summary::marker{content:''}.learn-menu.section-active summary{color:var(--accent);border-bottom-color:var(--accent)}.learn-menu[open] summary svg{transform:rotate(180deg)}.learn-menu summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px;border-radius:3px}.learn-submenu{position:absolute;top:calc(100% + 8px);left:-24px;width:310px;padding:10px;background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 45px #0002;z-index:20}.learn-submenu a{display:flex;flex-direction:column;gap:5px;border:0!important;padding:15px!important;border-radius:8px;text-decoration:none!important;color:var(--ink)!important;white-space:normal!important}.learn-submenu strong{font-size:15px}.learn-submenu span{font-size:14px;line-height:1.45;color:var(--muted);font-weight:400}.learn-submenu a:hover,.learn-submenu a:focus-visible,.learn-submenu a.active{background:var(--soft);outline-offset:-2px}.learn-submenu a.active strong{color:var(--accent)}
@media(max-width:760px){header>nav{display:flex;width:100%;justify-content:space-between;gap:12px;padding-bottom:0;overflow:visible}.learn-menu summary{padding:14px 0;font-size:13px}header>nav>a{font-size:13px;padding:14px 0}.learn-submenu{left:auto;right:-75px;top:calc(100% + 3px);width:min(310px,calc(100vw - 32px))}.learn-submenu a{padding:13px!important}}
@media(max-width:370px){header>nav{gap:8px}header>nav>a,.learn-menu summary{font-size:12px}}
.learn-menu{margin:0;padding:0;border:0}.learn-menu summary{margin:0;padding:14px 0}

/* A shared navigation rail gives the primary links the same considered surface as Learn. */
header>nav{gap:4px;padding:5px;border:1px solid var(--line);border-radius:18px;background:var(--white);box-shadow:0 4px 18px #00000004;flex-shrink:0}
header>nav>a,header>nav>.learn-menu>summary{display:flex;align-items:center;justify-content:center;min-height:44px;padding:11px 16px;margin:0;border:0;border-radius:12px;font-size:14px;line-height:1.4;font-weight:650;color:var(--muted);transition:box-shadow .18s;white-space:nowrap}
header>nav>a:hover,header>nav>.learn-menu>summary:hover{background:var(--soft);color:var(--ink)}
header>nav>a.active,header>nav>.learn-menu.section-active>summary{background:var(--action);color:var(--on-action);box-shadow:0 2px 6px #0000000c}
header>nav>.learn-menu[open]:not(.section-active)>summary{background:var(--soft);color:var(--accent)}
header>nav>a:focus-visible,header>nav>.learn-menu>summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.learn-submenu{top:calc(100% + 14px);left:0;border-radius:18px;padding:9px}
@media(min-width:761px) and (max-width:1100px){header>nav>a,header>nav>.learn-menu>summary{padding-left:11px;padding-right:11px}}
@media(max-width:760px){header>nav{width:100%;gap:3px;padding:4px;margin:0 0 12px;border-radius:15px;justify-content:stretch}header>nav>a,header>nav>.learn-menu{flex:1;min-width:0}header>nav>a,header>nav>.learn-menu>summary{min-height:44px;padding:10px 5px;font-size:14px;border-radius:10px}.learn-submenu{left:auto;right:-55px;top:calc(100% + 11px)}}
@media(max-width:370px){header>nav>a,header>nav>.learn-menu>summary{font-size:13px;padding-left:3px;padding-right:3px}.learn-submenu{right:-60px}}
@media(max-width:760px){header>nav{display:grid;grid-template-columns:.7fr 1.25fr .85fr 1.25fr}header>nav>a,header>nav>.learn-menu>summary{font-size:13px;white-space:normal;text-align:center;padding:9px 4px}header>nav>.learn-menu>summary{gap:5px}.learn-submenu{right:-58px}}
/* Keep the filled primary selection readable above the global theme link rule. */
[data-theme] header>nav>a.active,
[data-theme] header>nav>.learn-menu.section-active>summary{color:var(--on-action);background:var(--action)}