.sidebar-nav_container__k1jtu{display:none}@media only screen and (min-width:768px){.sidebar-nav_container__k1jtu{display:block;flex-shrink:1;position:-webkit-sticky;position:sticky;color:var(--color_fg_link);margin:2rem 0;padding:0 1rem;top:9rem;border-right:1px solid var(--color_border_bold);font-size:.875rem;max-width:20rem;height:-moz-fit-content;height:fit-content}}.sidebar-nav_title__S3RAR{cursor:pointer}.sidebar-nav_title__active__ecJHB{color:var(--color_fg_selected);text-decoration:underline}.sidebar-nav_list__lY8lB{list-style-type:none;display:flex;flex-direction:column;gap:2rem}.ebook-ad_container__ShWFi{margin-bottom:1.5rem}.ebook-ad_content__PYGYx{display:flex;width:calc(100% - 2rem);max-width:1312px;margin:0 auto;position:relative;max-width:776px;padding:1rem;border-radius:1rem;border:1px solid var(--color_border_default);box-shadow:0 0 0 .5px rgba(0,0,0,.12),0 2px 2px -1px rgba(0,0,0,.04),0 4px 4px -2px rgba(0,0,0,.04),0 6px 6px -3px rgba(0,0,0,.04)}@media only screen and (min-width:768px){.ebook-ad_content__PYGYx{width:calc(100% - 4rem)}}@media only screen and (min-width:1200px){.ebook-ad_content__PYGYx{width:calc(100% - 128px)}}.ebook-ad_copy__82W_M{font-weight:400;line-height:1.25rem;font-size:.875rem;color:var(--color_fg_default)}.ebook-ad_copy__82W_M strong{font-weight:500}.ebook-ad_copy__82W_M a{font-weight:500;text-decoration:underline}