/* A visible route back, with a named destination and a stable place on every page. */
.page-return{position:sticky;top:0;z-index:9;display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--bg);padding:8px 0;margin:-8px 0 25px;border-bottom:1px solid var(--line)}
.page-return a{display:inline-flex;gap:9px;align-items:center;min-height:44px;max-width:100%;padding:8px 10px 8px 0;font-size:13px;line-height:1.45;color:var(--fg);border-radius:5px}
.page-return a:hover span{text-decoration:underline;text-underline-offset:4px}
.page-return a svg{width:15px;height:15px;transform:rotate(180deg)}
.page-location{font-size:11px;line-height:1.5;color:var(--muted);text-align:right;max-width:42%}
.page-return~.reader-heading{margin-top:0}.page-return~.reader-heading h1{margin-top:0}
.reader :is(h2,h3,section)[id]{scroll-margin-top:90px}
.contents a{min-height:40px}
.presence-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;list-style:none;padding:0;margin:35px 0 22px}
.presence-flow li{padding-top:17px;border-top:1px solid var(--line)}
.presence-flow li>span{font-size:10px;color:var(--muted)}
.presence-flow h3{font-size:16px;font-weight:550;line-height:1.4;margin:13px 0 9px;letter-spacing:-.2px}
.presence-flow p{font-size:13px;line-height:1.65}
.platform-explanation>.quiet-button{margin-top:20px}
.platform-more{margin-top:30px;border-block:1px solid var(--line)}
.platform-more summary{min-height:52px;display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;font-size:13px;list-style:none;padding:12px 0}
.platform-more summary::-webkit-details-marker{display:none}
.platform-more summary::after{content:'+';font-size:20px;color:var(--muted)}
.platform-more[open] summary::after{content:'−'}
.platform-more>p{font-size:14px;line-height:1.75;padding:4px 0 14px;max-width:640px}
.platform-more .text-links{display:flex;flex-wrap:wrap;gap:16px 24px;margin:6px 0 24px;font-size:13px}
.platform-more .text-links a{display:inline-flex;align-items:center;gap:8px;min-height:40px}
.platform-more svg{width:15px;height:15px}
@media(max-width:640px){.page-return{margin-top:-7px;margin-bottom:23px;gap:8px;padding-block:4px}.page-return a{font-size:12px;min-height:44px}.page-location{display:none}.presence-flow{grid-template-columns:1fr;gap:0;margin-top:28px}.presence-flow li{display:grid;grid-template-columns:27px 1fr;gap:0 12px;padding:19px 0}.presence-flow li>span{grid-column:1;grid-row:1/3;padding-top:3px}.presence-flow h3{grid-column:2;margin:0 0 7px}.presence-flow p{grid-column:2;font-size:13px}.platform-more summary{font-size:12px}.platform-more>p{font-size:13px}.platform-explanation>.quiet-button{font-size:12px}.discover-intro h1{font-size:40px}.reader :is(h2,h3,section)[id]{scroll-margin-top:82px}}
@media(max-width:360px){.discover-intro h1{font-size:36px}}

.reader .reader-facts{display:flex;flex-wrap:wrap;gap:10px 20px;margin:24px 0;color:var(--muted);font-size:12px;line-height:1.5}.reader-facts>span{display:inline-flex;align-items:center;gap:7px}.reader-facts>span::before{content:'';width:3px;height:3px;border-radius:50%;background:currentColor;flex-shrink:0}