:root{color-scheme:light;--paper:#f4f5ef;--ink:#183c35;--muted:#51645d;--line:#cfd8ce;--green:#245b49;--lime:#daf89a;--white:#fff;--serif:Georgia,'Times New Roman',serif;--sans:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,a,input{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #876308;outline-offset:5px}.wrap{width:min(1200px,calc(100% - 80px));margin:auto}.skip{position:absolute;left:20px;top:-100px;background:var(--lime);padding:10px;z-index:5}.skip:focus{top:10px}.masthead{border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:98px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;line-height:1.1;font-size:21px;font-weight:700;letter-spacing:-.5px}.brand svg{width:40px;height:44px}.brand small{display:block;font-size:10px;letter-spacing:2.5px;margin-top:7px;text-transform:uppercase;font-weight:400}.nav-links{display:flex;gap:30px;align-items:center;font-size:14px}.nav-links a{text-decoration:none}.nav-links a:hover{text-decoration:underline}.pill{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:30px;padding:7px 13px;font-size:11px;letter-spacing:1px;text-transform:uppercase}.dot{width:7px;height:7px;background:var(--green);border-radius:50%}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;font-weight:700;margin:0 0 24px}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:70px;padding:75px 0 65px;align-items:center}.hero h1{font-family:var(--serif);font-size:clamp(49px,5.2vw,76px);line-height:1.04;font-weight:400;letter-spacing:-3px;margin:0 0 26px}.hero h1 em{font-weight:400;color:var(--green)}.lede{font-size:18px;line-height:1.7;color:var(--muted);max-width:560px}.hero-links{display:flex;gap:25px;align-items:center;margin-top:30px;font-size:14px}.text-link{font-weight:700}.checker{background:white;border:1px solid var(--line);box-shadow:10px 12px 0 #e2e8d9;padding:30px}.checker-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:24px;gap:10px}.checker-top span{font-size:10px;text-transform:uppercase;letter-spacing:1.2px}.checker h2{font-size:27px;line-height:1.2;margin:0 0 10px;font-weight:500;letter-spacing:-.7px}.checker p{color:var(--muted);font-size:14px}.checker label{display:block;font-size:12px;font-weight:700;margin:23px 0 8px}.field-row{display:flex;gap:8px}.field-row input{width:100%;min-width:0;border:1px solid #acbdb0;border-radius:0;padding:12px;font-size:15px;background:#f9faf6;color:var(--ink)}.button{border:1px solid var(--green);background:var(--green);color:white;padding:12px 19px;cursor:pointer;font-weight:700;white-space:nowrap;font-size:14px;text-decoration:none;display:inline-block}.button:hover{background:#163e30}.quiet-button{border:0;background:none;padding:0;text-decoration:underline;color:var(--muted);font-size:12px;cursor:pointer}.examples{display:flex;align-items:center;gap:12px;margin:15px 0;font-size:12px;flex-wrap:wrap}.privacy-note{border-top:1px solid var(--line);padding-top:16px;font-size:12px!important}.check-result{margin-top:22px;background:#edf7dc;padding:20px;border-left:3px solid var(--green)}.check-result h3{font-size:18px;line-height:1.4;margin:0 0 8px}.check-result code{overflow-wrap:anywhere;display:block;font-size:16px}.check-result.unlisted,.check-result.warning,.check-result.invalid{background:#fff3da;border-color:#a87b25}.check-result p{margin:9px 0}.status-strip{display:grid;grid-template-columns:1.2fr 2fr auto;gap:25px;padding:23px 0;border-block:1px solid var(--line);align-items:center;font-size:13px}.status-strip strong{font-size:14px}.status-strip p{margin:0;color:var(--muted)}.section{padding:65px 0}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:35px}.section-heading h2,.statement h2{font-family:var(--serif);font-weight:400;font-size:43px;line-height:1.15;letter-spacing:-1.5px;margin:0}.section-heading p{max-width:390px;font-size:15px;color:var(--muted);margin:0}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.topic{padding:30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-decoration:none;transition:background .15s}.topic:hover{background:#e6eedc}.topic .number{font-family:monospace;font-size:12px;color:var(--muted)}.topic h3{font-size:22px;letter-spacing:-.5px;font-weight:500;line-height:1.3;margin:22px 0 12px}.topic p{font-size:14px;color:var(--muted);margin:0 0 25px}.topic .arrow{display:block;font-size:22px}.statement{display:grid;grid-template-columns:1fr 1fr;gap:70px;border-top:1px solid var(--line);padding-top:50px}.statement p{font-size:16px;color:var(--muted)}.steps{list-style:none;padding:0;margin:0;counter-reset:step}.steps li{padding:18px 0;border-bottom:1px solid var(--line);display:flex;gap:20px;font-size:15px}.steps li:before{counter-increment:step;content:'0' counter(step);color:var(--green);font-family:monospace}.domain-table{width:100%;border-collapse:collapse}.domain-table th{text-align:left;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);padding:16px 10px;border-bottom:1px solid var(--line)}.domain-table td{padding:22px 10px;border-bottom:1px solid var(--line);font-size:14px}.domain-table td:first-child{font-size:21px;font-weight:700}.domain-table .description{max-width:430px;color:var(--muted)}.note{background:#e7eedf;padding:24px;font-size:14px;border-left:3px solid var(--green)}.breadcrumb{font-size:12px;color:var(--muted);padding-top:30px}.article-head{max-width:920px;padding:52px 0 45px}.article-head h1{font-family:var(--serif);font-weight:400;font-size:clamp(42px,4.7vw,65px);line-height:1.08;letter-spacing:-2px;margin:0 0 24px}.article-head .lede{max-width:760px}.article-layout{display:grid;grid-template-columns:250px minmax(0,720px);gap:70px;padding:20px 0 65px;align-items:start}.aside{position:sticky;top:25px;border-top:3px solid var(--green);padding-top:20px;font-size:13px}.aside p{color:var(--muted)}.toc a{display:block;margin:16px 0;color:var(--muted);text-decoration:none;line-height:1.5;font-size:13px}.toc a:hover{text-decoration:underline}.article-body section{margin-bottom:38px;scroll-margin-top:35px}.article-body h2{font-size:29px;line-height:1.25;font-weight:500;letter-spacing:-.7px;margin:0 0 18px}.article-body p{font-size:17px;color:#374f46;margin:0 0 18px}.checklist{padding:25px 30px;background:#e6eedd;margin:30px 0}.checklist h2{font-size:23px}.checklist ul{padding-left:20px;margin:0}.checklist li{padding:7px 0;font-size:15px}details{border-block-start:1px solid var(--line);padding:18px 0}summary{cursor:pointer;font-weight:700;font-size:16px}details p{padding-top:12px}.footer{background:var(--ink);color:#f1f5e9;padding:45px 0 25px}.footer-top{display:flex;justify-content:space-between;gap:45px}.footer .brand{margin-bottom:20px}.footer p{font-size:13px;max-width:420px;color:#bfcec3}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:14px 35px;font-size:13px}.footer a{text-decoration:none}.footer a:hover{text-decoration:underline}.footer-bottom{margin-top:35px;padding-top:20px;border-top:1px solid #4b655c;display:flex;justify-content:space-between;gap:20px;font-size:11px;color:#bfcec3}.checker-page{max-width:750px;margin:0 auto 70px}.source{font-size:14px!important}.related{border-top:1px solid var(--line);padding-top:30px}.related a{display:block;margin:12px 0}.not-found{padding:90px 0;max-width:700px}.not-found h1{font-family:var(--serif);font-size:60px;font-weight:400;line-height:1.1}.badge{font-size:11px;text-transform:uppercase;background:var(--lime);color:var(--ink);padding:6px 10px}
@media(max-width:950px){.wrap{width:calc(100% - 40px)}.nav-links{gap:18px}.nav-links .optional{display:none}.hero{gap:35px;padding:50px 0}.hero h1{font-size:55px}.checker{padding:23px}.article-layout{grid-template-columns:200px minmax(0,1fr);gap:35px}.topic{padding:23px}.status-strip{grid-template-columns:1fr 2fr}.status-strip>a{display:none}}
@media(max-width:680px){body{font-size:16px}.nav{min-height:80px}.brand{font-size:18px}.brand svg{width:32px}.brand small{font-size:8px}.nav-links{gap:15px;font-size:12px}.nav-links .desktop{display:none}.hero{grid-template-columns:1fr;gap:35px;padding:40px 0}.hero h1{font-size:52px;letter-spacing:-2px}.lede{font-size:17px}.hero-links{gap:22px}.checker{box-shadow:5px 6px 0 #e2e8d9}.field-row{flex-direction:column}.field-row .button{width:100%}.status-strip{grid-template-columns:1fr;gap:8px}.section{padding:42px 0}.section-heading{display:block}.section-heading h2,.statement h2{font-size:35px}.section-heading p{margin-top:18px}.topic-grid{grid-template-columns:1fr}.topic h3{margin-top:12px}.topic p{margin-bottom:10px}.statement{grid-template-columns:1fr;gap:25px}.article-head{padding:35px 0 20px}.article-head h1{font-size:43px}.article-layout{grid-template-columns:1fr;gap:25px}.aside{position:static}.toc{display:none}.article-body h2{font-size:25px}.domain-table thead{display:none}.domain-table tr,.domain-table td{display:block}.domain-table tr{border-bottom:1px solid var(--line);padding:12px 0}.domain-table td{border:0;padding:5px 0}.footer-top{display:block}.footer-links{margin-top:25px;gap:16px}.footer-bottom{flex-direction:column}.checklist{padding:22px}.article-head .eyebrow{margin-bottom:18px}}