.main-layout{--main-layout-width:90ch;max-inline-size:var(--main-layout-width);margin-inline:auto;padding-inline:1rem}.main-layout__header{margin-block:1.5rem 2.75rem}.main-layout__header h1{font-size:3.5rem}.main-layout__description{color:var(--c-text-muted)}.main-layout>.prose{--content-width:var(--main-layout-width);margin-inline:0}