.nav-section{display:flex;align-items:stretch;position:relative}.nav-section>.nav-group{position:static}.nav-section>.nav-tab{padding-right:4px}.nav-section>.nav-group>summary{padding-left:5px;padding-right:8px}.nav-section.section-active>.nav-tab{color:var(--ice)}.nav-section .nav-dropdown .nav-tab{font-size:.9rem}.hub-heading{max-width:760px;margin-bottom:1.8rem}.hub-heading h1{font-size:clamp(2rem,5vw,3.6rem);margin:.4rem 0 .8rem;letter-spacing:-.035em}.hub-heading>p:last-child{font-size:1.06rem;color:var(--muted);line-height:1.65}.hub-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.hub-card{display:flex;flex-direction:column;text-align:left;min-width:0;padding:clamp(1rem,2.8vw,1.7rem);border:1px solid var(--line);border-radius:var(--radius);color:var(--text);background:var(--surface);transition:border-color .16s,background .16s}.hub-card:hover,.hub-card:focus-visible{border-color:var(--ice);background:var(--surface-2)}.hub-card:focus-visible{outline:2px solid var(--ice);outline-offset:4px}.hub-card-top{display:flex;align-items:center;gap:.7rem;width:100%;font-size:.875rem;color:var(--muted)}.hub-number{color:var(--ice);font-variant-numeric:tabular-nums;font-weight:700}.hub-arrow{margin-left:auto;color:var(--ice);font-size:1.4rem}.hub-card>strong{font-size:clamp(1.2rem,2.5vw,1.55rem);margin:.85rem 0 .6rem}.hub-description{font-size:1rem;line-height:1.6;color:var(--muted);flex:1}.hub-open{font-size:.875rem;color:var(--ice);margin-top:1.25rem;font-weight:650}.hub-note{margin-top:1.4rem;max-width:800px;line-height:1.6;color:var(--muted)}.hub-back{display:block;margin:0 0 1rem;font-size:.875rem}@media(max-width:640px){.hub-grid{grid-template-columns:1fr}.hub-heading{margin-bottom:1.2rem}.primary-nav>.nav-section>.nav-tab{padding-left:8px;padding-right:2px}.nav-section>.nav-group>summary{padding:0 5px}.nav-section .nav-dropdown{left:0;right:0}}@media(prefers-reduced-motion:reduce){.hub-card{transition:none}}

@media(max-width:1040px){.primary-nav{position:relative}.nav-section{position:static}.primary-nav .nav-section .nav-dropdown{left:0;right:0;top:100%;width:auto;margin-top:4px;max-height:70vh;overflow-y:auto}}