/* Persian masthead: signature, index, and one interrupted rule. */
.editorial-masthead{position:sticky;inset-block-start:0;z-index:5;grid-template-columns:1fr auto;gap:.65rem 2rem;padding-block:1.4rem .8rem;border:0;background:var(--paper);transition:padding 160ms ease}
.editorial-masthead .home-mark{grid-area:1/1;justify-self:start;font-size:.85rem;font-weight:550;gap:.8rem}
.editorial-masthead .home-mark span{font-size:1.6rem;font-weight:300}
.editorial-masthead .languages{grid-area:1/2;font-family:Vazirmatn,Tahoma,sans-serif;gap:.45rem;align-items:center;font-size:.67rem;letter-spacing:.02em;color:var(--muted)}
.editorial-masthead .languages a{min-inline-size:1.6rem;justify-content:center;font-weight:400}
.editorial-masthead .languages [aria-current]{text-decoration:none;color:var(--ink);font-weight:650}
.editorial-masthead .masthead-paths{grid-area:2/1/3/3;position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;max-inline-size:40rem;inline-size:100%;padding-block:.35rem 1rem;margin-inline-start:0}
.masthead-paths:after{content:"";position:absolute;inset-inline-start:3.2rem;inset-inline-end:-14%;inset-block-end:0;block-size:1px;background:linear-gradient(to left,var(--line) 0 67%,transparent 67% 75%,var(--line) 75%)}
.editorial-masthead .masthead-paths a{position:relative;display:flex;gap:.7rem;min-block-size:44px;font-size:.85rem;font-weight:500;white-space:nowrap;text-decoration:none;padding-inline-start:.9rem}
.masthead-paths .nav-folio{display:flex;gap:.35rem;font-size:.62rem;font-weight:350;color:var(--muted)}
.masthead-threshold{position:absolute;inset-block-start:.8rem;inset-inline-start:calc(var(--masthead-index,0)*25%);inline-size:1px;block-size:1.4rem;background:var(--accent);transition:inset-inline-start 200ms ease;pointer-events:none}
.masthead-paths[data-idle] .masthead-threshold{block-size:.6rem;inset-block-start:1.3rem}
.masthead-paths a[aria-current]{color:var(--ink);font-weight:600}
.editorial-masthead[data-scrolled]{padding-block:.65rem .5rem}
section[id]{scroll-margin-block-start:10rem}.skip:focus{z-index:10}
@media(max-width:600px){.editorial-masthead{gap:.25rem .7rem;padding-block:.7rem .55rem}.editorial-masthead .home-mark{font-size:.77rem;gap:.4rem}.editorial-masthead .languages{gap:.15rem}.editorial-masthead .masthead-paths{margin:0;padding-block:.15rem .75rem}.editorial-masthead .masthead-paths a{gap:.3rem;font-size:.72rem;padding-inline-start:.4rem}.masthead-paths .nav-folio{gap:.15rem;font-size:.52rem}.masthead-paths:after{inset-inline-start:1.3rem;inset-inline-end:0}.masthead-threshold{inset-block-start:.7rem;block-size:1.1rem}.masthead-paths[data-idle] .masthead-threshold{inset-block-start:.95rem}.editorial-masthead[data-scrolled]{padding-block:.45rem}.editorial-masthead .languages a{min-inline-size:1.5rem}section[id]{scroll-margin-block-start:8rem}}
@media(prefers-reduced-motion:reduce){.editorial-masthead,.masthead-threshold{transition:none}}
@media(forced-colors:active){.masthead-threshold{background:Highlight}.masthead-paths:after{background:CanvasText}}