:root{--ink:#181818;--ink-soft:#4a4a4a;--paper:#fbf9f6;--paper-2:#f3efe9;--accent:#2c6184;--accent-strong:#234e6a;--line:#e6e0d8;--maxw:720px;--measure:38rem;--serif:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--paper);color:var(--ink);font-family:var(--sans);margin:0;font-size:18px;line-height:1.65}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}main{min-height:60vh}a{color:var(--accent);text-underline-offset:2px;text-decoration:underline 1px;transition:color .14s,text-decoration-thickness .14s}a:hover{color:var(--accent-strong);text-decoration-thickness:2px}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.site-header{border-bottom:1px solid var(--line);background:var(--paper)}.site-header .wrap{justify-content:space-between;align-items:center;gap:12px;padding-top:8px;padding-bottom:8px;display:flex}.logo{font-family:var(--serif);color:var(--ink);letter-spacing:-.02em;white-space:nowrap;padding:6px 0;font-size:clamp(19px,5vw,24px);font-weight:700;text-decoration:none}.logo span{color:var(--accent)}.site-header nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;display:flex}.site-header nav>a{color:var(--ink-soft);margin-left:2px;padding:12px 9px;font-size:16px;text-decoration:none;transition:color .14s;display:inline-block}.site-header nav>a:hover{color:var(--accent)}@media (width<=420px){.site-header .wrap{flex-wrap:wrap;row-gap:0;padding-bottom:4px}.logo{flex:1 0 100%}.site-header nav{justify-content:flex-start;width:100%;margin-left:-9px}}.lang-switch{color:var(--ink-soft);margin:14px 0 18px;font-size:13px}.lang-switch summary{cursor:pointer;align-items:center;gap:7px;padding:6px 0;list-style:none;display:inline-flex}.lang-switch summary::-webkit-details-marker{display:none}.lang-switch summary:after{content:"▾";font-size:11px}.lang-switch[open] summary:after{content:"▴"}.lang-switch summary:hover{color:var(--accent)}.lang-switch .ls-list{flex-direction:column;gap:5px;margin:8px 0 0;padding:0;list-style:none;display:flex}.lang-switch .ls-row{flex-wrap:wrap;align-items:center;gap:7px;display:flex}.lang-switch a{color:var(--ink-soft);text-decoration:none}.lang-switch a:hover{color:var(--accent)}.lang-switch .ls-on{color:var(--ink);font-weight:700}.lang-switch .ls-sep{color:var(--line)}h1,h2,h3{font-family:var(--serif);letter-spacing:-.015em;text-wrap:balance;line-height:1.18}h1{margin:0 0 .4em;font-size:clamp(2rem,1.55rem + 1.9vw,2.75rem)}h2{margin:1.8em 0 .5em;font-size:clamp(1.4rem,1.2rem + .85vw,1.75rem);line-height:1.24}h3{margin:1.5em 0 .4em;font-size:clamp(1.15rem,1.05rem + .4vw,1.3rem);line-height:1.3}.hero{border-bottom:1px solid var(--line);padding:clamp(48px,4vw + 32px,88px) 0 clamp(30px,2vw + 18px,44px)}.hero .tagline{font-family:var(--serif);letter-spacing:-.02em;text-wrap:balance;margin:0 0 18px;font-size:clamp(2.3rem,1.5rem + 3.2vw,3.25rem);line-height:1.08}.hero p{color:var(--ink-soft);text-wrap:pretty;max-width:34rem;margin:0;font-size:clamp(1.1rem,1rem + .4vw,1.2rem)}.kicker{font-family:var(--sans);letter-spacing:.01em;color:var(--ink-soft);margin:0 0 10px;font-size:.82rem;font-weight:700}.region-list{margin:28px 0 0;padding:0;list-style:none}.region-list li{border-bottom:1px solid var(--line);padding:18px 0}.region-list>li>a{font-family:var(--serif);color:var(--ink);letter-spacing:-.01em;font-size:1.5rem;text-decoration:none}.region-list>li>a:hover{color:var(--accent)}.region-list .langs{color:var(--ink-soft);margin-top:4px;font-size:.95rem}.article-list{margin:28px 0;padding:0;list-style:none}.article-list li{border-bottom:1px solid var(--line);padding:22px 0}.article-list a.title{font-family:var(--serif);color:var(--ink);letter-spacing:-.01em;background-image:linear-gradient(var(--accent), var(--accent));background-position:0 100%;background-repeat:no-repeat;background-size:0% 1.5px;width:fit-content;max-width:100%;margin-bottom:6px;font-size:clamp(1.3rem,1.15rem + .6vw,1.5rem);line-height:1.25;text-decoration:none;transition:background-size .26s cubic-bezier(.2,.7,.2,1),color .15s;display:block}.article-list a.title:hover,.article-list a.title:focus-visible{color:var(--accent);background-size:100% 1.5px}.article-list .meta{color:var(--ink-soft);font-size:.85rem}.article-list p{color:var(--ink-soft);max-width:var(--measure);margin:8px 0 0;font-size:1rem}.cluster{margin:clamp(36px,4vw,52px) 0}.section-title{font-family:var(--serif);letter-spacing:0;color:var(--ink);border-bottom:1px solid var(--line);margin:0;padding-bottom:10px;font-size:1.1rem;font-weight:700}.cluster .article-list{margin-top:0}.breadcrumb{margin:0 0 18px}.breadcrumb ol{font-family:var(--sans);flex-wrap:nowrap;align-items:center;gap:8px;margin:0;padding:0;font-size:.82rem;list-style:none;display:flex}.breadcrumb li{align-items:center;gap:8px;display:flex}.breadcrumb li:first-child{flex:none}.breadcrumb li+li:before{content:"/";color:var(--line);flex:none}.breadcrumb a{color:var(--ink-soft);white-space:nowrap;margin:-10px 0;padding:10px 0;text-decoration:none;transition:color .14s}.breadcrumb a:hover{color:var(--accent);text-underline-offset:2px;text-decoration:underline 1px}.breadcrumb-current{flex:0 auto;min-width:0}.breadcrumb-current span{text-overflow:ellipsis;white-space:nowrap;min-width:0;color:var(--ink-soft);display:block;overflow:hidden}.article{padding:40px 0 24px}.article .meta{color:var(--ink-soft);margin-bottom:28px;font-size:.88rem}.article-body{font-size:1.12rem;line-height:1.7}.article-body p,.article-body ul,.article-body ol{max-width:var(--measure);margin:1.1em 0}.article-body li{margin:.4em 0}.article-body p{text-wrap:pretty}.article-body strong{color:var(--ink)}.article-body blockquote{border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-family:var(--serif);color:var(--ink);max-width:var(--measure);margin:1.8em 0;padding:18px 0;font-size:1.2rem;line-height:1.45}.article-body blockquote p{max-width:none;margin:0}.article-body table{border-collapse:collapse;width:100%;margin:1.5em 0;font-size:.95rem}.article-body th,.article-body td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:10px 12px}.article-body th{background:var(--paper-2);font-family:var(--sans)}.faq{border-top:1px solid var(--line);margin:40px 0;padding:28px 0}.faq h2{margin-top:0}.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq summary{cursor:pointer;padding:2px 0;font-size:1.05rem;font-weight:600;transition:color .14s}.faq summary:hover{color:var(--accent)}.faq details p{color:var(--ink-soft);max-width:var(--measure);margin:10px 0 0}.related{border-top:1px solid var(--line);margin:40px 0;padding:28px 0}.related h2{margin-top:0}.related ul{margin:0;padding:0;list-style:none}.related li{border-bottom:1px solid var(--line);padding:10px 0}.related li:last-child{border-bottom:0}.related a{font-family:var(--serif);color:var(--ink);background-image:linear-gradient(var(--accent), var(--accent));background-position:0 100%;background-repeat:no-repeat;background-size:0% 1.5px;font-size:1.15rem;text-decoration:none;transition:background-size .26s cubic-bezier(.2,.7,.2,1),color .15s}.related a:hover,.related a:focus-visible{color:var(--accent);background-size:100% 1.5px}.site-footer{border-top:1px solid var(--line);background:var(--paper-2);margin-top:64px;padding:32px 0}.site-footer .disclosure{color:var(--ink-soft);margin:0 0 12px;font-size:.92rem}.site-footer .fineprint{color:var(--ink-soft);margin:0;font-size:.8rem}.footer-nav{flex-wrap:wrap;gap:2px 18px;margin:0 0 10px;display:flex}.footer-nav a{color:var(--ink-soft);padding:8px 0;font-size:.85rem;text-decoration:none;transition:color .14s;display:inline-block}.footer-nav a:hover{color:var(--accent)}@media (width<=640px){body{font-size:17px}.hero{padding:40px 0 28px}}.quick-answer{background:var(--paper-2);border:1px solid var(--line);border-radius:6px;margin:0 0 30px;padding:16px 20px}.quick-answer .qa-label{font-family:var(--sans);letter-spacing:.02em;color:var(--accent);margin:0 0 6px;font-size:.78rem;font-weight:700}.quick-answer p:last-child{color:var(--ink);margin:0;font-size:1.06rem;line-height:1.55}.evidence{border:1px solid var(--line);background:var(--paper);border-radius:6px;align-items:center;gap:10px;margin:0 0 22px;padding:7px 14px 7px 11px;display:inline-flex}.evidence-label{font-family:var(--sans);letter-spacing:.01em;color:var(--ink);font-size:.9rem;font-weight:700}.evidence-meter{align-items:flex-end;gap:2.5px;height:15px;display:inline-flex}.evidence-bar{border:1px solid var(--accent);background:var(--accent);border-radius:1px;width:4px}.evidence-bar[data-h="1"]{height:7px}.evidence-bar[data-h="2"]{height:11px}.evidence-bar[data-h="3"]{height:15px}.evidence-bar:not(.is-filled){background:var(--paper);border-color:var(--line)}.evidence--strong-human{background:var(--accent-soft);border-color:var(--accent-soft)}.evidence--strong-human .evidence-label{color:var(--accent-strong)}.evidence--preliminary{border-style:dashed}.evidence--preliminary .evidence-label,.evidence--animal-only .evidence-label{color:var(--ink-soft)}.evidence--animal-only{background:var(--paper-2)}.newsletter{border-top:1px solid var(--line);margin:48px 0 0;padding:32px 0 8px}.newsletter .nl-heading{margin:0 0 6px;font-size:1.35rem}.newsletter .nl-sub{color:var(--ink-soft);margin:0 0 16px;font-size:1rem}.newsletter .nl-form{flex-wrap:wrap;gap:10px;display:flex}.newsletter .nl-input{font-size:1rem;font-family:var(--sans);border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:6px;flex:220px;padding:11px 14px}.newsletter .nl-input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}.newsletter .nl-button{font-size:1rem;font-weight:600;font-family:var(--sans);color:var(--paper);background:var(--accent);cursor:pointer;border:0;border-radius:6px;padding:11px 22px;transition:background-color .14s}.newsletter .nl-button:hover{background:var(--accent-strong)}.newsletter .nl-privacy{color:var(--ink-soft);margin:10px 0 0;font-size:.8rem}.newsletter .nl-privacy a{color:var(--ink-soft)}
