.knowledge-hub{background:var(--surface-base)}.knowledge-hub__hero{background:linear-gradient(125deg,var(--surface-base),var(--surface-secondary));border-bottom:1px solid var(--accent-gold);overflow:hidden;padding:clamp(6rem,11vw,10rem) 0;position:relative}.knowledge-hub__hero:before{border:1px solid var(--accent-gold);content:"";height:clamp(15rem,27vw,27rem);position:absolute;right:clamp(-10rem,-4vw,-3rem);top:clamp(3rem,7vw,7rem);transform:rotate(45deg);width:clamp(15rem,27vw,27rem)}.knowledge-hub__hero .shell{position:relative}.knowledge-hub__hero h1{color:var(--color-primary);max-width:14ch}.knowledge-hub__hero .lead{color:var(--color-primary);max-width:43rem}.knowledge-hub__intro{max-width:47rem}.knowledge-hub__grid{display:grid;gap:1.25rem;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:3.5rem}.knowledge-card{background:var(--surface-base);border:1px solid var(--surface-secondary);display:flex;flex-direction:column;min-height:21rem;padding:clamp(2rem,4vw,3.25rem);position:relative}.knowledge-card:before{background:var(--accent-gold);content:"";height:2px;left:2rem;position:absolute;top:0;width:3.5rem}.knowledge-card__number{color:var(--color-primary);font:600 1.05rem var(--serif);letter-spacing:.08em;margin:0 0 2.75rem}.knowledge-card h2{font-size:clamp(1.9rem,3vw,2.7rem);margin-bottom:1rem;max-width:14ch}.knowledge-card p{color:var(--color-primary);font-size:.93rem;line-height:1.75;max-width:34rem}.knowledge-card .button{align-self:flex-start;margin-top:auto}.knowledge-card--controlled{background:var(--surface-secondary);border-color:var(--accent-gold)}.knowledge-hub__note{color:var(--color-primary);font-size:.78rem;margin:1.4rem 0 0}.knowledge-modal[hidden]{display:none}.knowledge-modal{align-items:center;background:rgba(17,18,17,.56);display:flex;inset:0;justify-content:center;padding:1.5rem;position:fixed;z-index:100}.knowledge-modal__dialog{background:var(--surface-base);border-top:3px solid var(--accent-gold);box-shadow:0 24px 70px rgba(17,18,17,.24);max-width:38rem;padding:clamp(2rem,5vw,4rem);position:relative;width:100%}.knowledge-modal__close{background:transparent;border:0;color:var(--color-primary);font-size:1.75rem;line-height:1;padding:.35rem;position:absolute;right:1.25rem;top:1.1rem}.knowledge-modal h2{font-size:clamp(2.2rem,4vw,3.2rem);max-width:12ch}.knowledge-modal p{color:var(--color-primary);max-width:32rem}.knowledge-modal__actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}.knowledge-modal__actions .button--secondary{background:transparent;color:var(--color-primary)}.knowledge-modal__actions .button--secondary:hover{background:var(--surface-secondary)}@media(max-width:620px){.knowledge-hub__grid{grid-template-columns:1fr}.knowledge-card{min-height:17rem}.knowledge-modal__actions{align-items:stretch;flex-direction:column}.knowledge-modal__actions .button{width:100%}}