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Ss({viewport$:e}){if(!Z("header.autohide"))return $(!1);let t=e.pipe(m(({offset:{y:o}})=>o),Ce(2,1),m(([o,i])=>[oMath.abs(i-o.y)>100),m(([,[o]])=>o),B()),n=dt("search");return Y([e,n]).pipe(m(([{offset:o},i])=>o.y>400&&!i),B(),w(o=>o?r:$(!1)),z(!1))}function bi(e,t){return P(()=>Y([ve(e),Ss(t)])).pipe(m(([{height:r},n])=>({height:r,hidden:n})),B((r,n)=>r.height===n.height&&r.hidden===n.hidden),X(1))}function vi(e,{header$:t,main$:r}){return P(()=>{let n=new S,o=n.pipe(de(1));return n.pipe(J("active"),Ze(t)).subscribe(([{active:i},{hidden:a}])=>{e.classList.toggle("md-header--shadow",i&&!a),e.hidden=a}),r.subscribe(n),t.pipe(ee(o),m(i=>k({ref:e},i)))})}function ws(e,{viewport$:t,header$:r}){return dr(e,{viewport$:t,header$:r}).pipe(m(({offset:{y:n}})=>{let{height:o}=he(e);return{active:n>=o}}),J("active"))}function gi(e,t){return P(()=>{let r=new S;r.subscribe(({active:o})=>{e.classList.toggle("md-header__title--active",o)});let n=pe("article h1");return typeof 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