@font-face{font-family:"Source Serif 4";src:url(fonts/serif.woff2) format("woff2");font-weight:200 900;font-display:swap}
@font-face{font-family:"Montserrat";src:url(fonts/sans.woff2) format("woff2");font-weight:100 900;font-display:swap}
:root{--ink:#1A2B34;--teal:#00B29A;--teal-deep:#0A6B60;--mist:#EEF4F2;--line:#D5DFDC;--violet:#6A4DE0;--muted:#55666D;--serif:"Source Serif 4",Georgia,serif;--sans:"Montserrat",system-ui,sans-serif}
*{box-sizing:border-box;margin:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--sans);color:var(--ink);background:#fff;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--violet);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px 14px;z-index:9}
.wrap{max-width:1280px;margin:0 auto;padding:0 40px}
.proto{background:var(--violet);color:#fff;font-size:12.5px;font-weight:500;text-align:center;padding:7px 16px}
.nav{display:flex;align-items:center;gap:36px;height:84px}
.nav img{height:26px;display:block}
.nav ul{display:flex;gap:28px;list-style:none;padding:0;font-size:14px;font-weight:600}
.nav ul a[aria-current]{box-shadow:0 2px 0 var(--teal)}
.nav ul a:hover,.nav .acct:hover{color:var(--teal-deep)}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:14px;font-weight:600}
.nav .acct{color:var(--muted)}
.menu{display:none}
.btn{display:inline-block;font:600 15px/1 var(--sans);padding:16px 24px;border-radius:4px;border:1.5px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;transition:background .15s,color .15s}
.btn:hover{background:var(--teal-deep);border-color:var(--teal-deep)}
.btn.small{padding:12px 18px;font-size:14px}
.btn.ghost{background:transparent;color:var(--ink)}.btn.ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn.teal{background:var(--teal);border-color:var(--teal);color:var(--ink)}.btn.teal:hover{background:#fff;border-color:#fff}
.cta{display:flex;gap:12px;flex-wrap:wrap}
h1{font:600 72px/1.02 var(--serif);letter-spacing:-.022em}
.hero{display:grid;grid-template-columns:470px 1fr;gap:64px;align-items:start;padding-top:44px;padding-bottom:40px}
.lead{font:400 21px/1.5 var(--serif);margin:26px 0 32px;max-width:27em;color:#2c3e47}
.chart{position:relative;padding-top:38px;margin:0}
.chart h2,.chart .cap{font:600 14px/1.3 var(--sans);position:absolute;top:0;left:0}
.rows{position:relative}
.row{display:flex;align-items:center;height:46px;border-top:1px solid var(--line)}
.row:last-of-type{border-bottom:1px solid var(--line)}
.row .name{width:164px;flex:none;font-size:14px;font-weight:600}
.row .name a{text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:4px}
.row .track{position:relative;flex:1;height:100%}
.bar{position:absolute;top:11px;bottom:11px;right:0;background:var(--teal);border-radius:2px 0 0 2px;display:flex;align-items:center;transform-origin:right;animation:grow .9s cubic-bezier(.2,.7,.2,1) both}
.bar.ends{border-radius:2px}
@keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@media (prefers-reduced-motion:reduce){.bar{animation:none}}
.bar span{font:700 14px/1 var(--sans);padding-left:9px;color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.feeds{position:absolute;top:-30px;bottom:-2px;right:0;width:calc((100% - 164px) * .0639);background:repeating-linear-gradient(135deg,rgba(106,77,224,.9) 0 2px,rgba(106,77,224,.28) 2px 6px);border-left:2px solid var(--violet);pointer-events:none}
.feeds-label{position:absolute;top:-30px;right:calc((100% - 164px) * .0639 + 10px);font:600 13px/1.25 var(--sans);color:var(--violet);text-align:right;white-space:nowrap}
.axis{margin-left:164px;position:relative;height:26px;font:500 12px/1 var(--sans);color:var(--muted);font-variant-numeric:tabular-nums}
.axis i{position:absolute;top:9px;font-style:normal;transform:translateX(-50%)}
.chart small{display:block;margin-top:8px;font-size:12px;color:var(--muted)}
.proof{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--mist)}
.proof .wrap{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:40px;padding-top:22px;padding-bottom:22px;align-items:center}
.proof p{font:400 17px/1.4 var(--serif)}
.proof b{font:600 26px/1 var(--serif);display:block;margin-bottom:4px}
.proof div{font-size:13px;color:var(--muted);font-weight:500}
section{padding:88px 0}
section.tight{padding:56px 0}
h2.title{font:600 44px/1.1 var(--serif);letter-spacing:-.015em;max-width:16em}
h2.title.s{font-size:34px}
.sub{font:400 19px/1.5 var(--serif);color:#2c3e47;margin-top:14px;max-width:34em}
.roles{display:grid;grid-template-columns:400px 1fr;margin-top:44px;border-top:2px solid var(--ink)}
.roles [role=tablist]{display:flex;flex-direction:column}
.roles button{all:unset;cursor:pointer;font:500 24px/1.2 var(--serif);padding:19px 20px 19px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.roles button:hover{color:var(--ink)}
.roles button:focus-visible{outline:3px solid var(--violet)}
.roles button[aria-selected=true]{color:var(--ink);font-weight:600}
.roles [role=tablist]{position:relative}
.roles .ind{position:absolute;top:0;right:0;width:4px;height:100px;background:var(--teal);transform-origin:0 0;transition:transform .3s cubic-bezier(.2,.7,.2,1);pointer-events:none}
.panel{background:var(--mist);padding:44px 52px;display:grid;grid-template-columns:1fr 250px;gap:48px}
.panel h3{font:600 30px/1.15 var(--serif);margin-bottom:22px;max-width:15em}
ul.ticks{list-style:none;padding:0;display:grid;gap:14px;font-size:16px;margin-bottom:30px}
ul.ticks li{padding-left:22px;position:relative;max-width:36em}
ul.ticks li::before{content:"";position:absolute;left:0;top:.6em;width:10px;height:3px;background:var(--teal)}
.side{border-left:1px solid var(--line);padding-left:28px;font-size:14px}
.side b{display:block;font:600 14px var(--sans);margin-bottom:10px}
.side a{display:block;padding:9px 0;border-bottom:1px solid var(--line);text-decoration:underline;text-decoration-color:var(--teal);text-underline-offset:3px}
.dark{background:var(--ink);color:#fff}
.dark .sub{color:#c5d2d2}
table.ds{width:100%;border-collapse:collapse;margin-top:44px}
.ds th{font:600 13px var(--sans);text-align:left;color:#9fb3b3;padding:0 0 12px;border-bottom:1px solid #3a4c55}
.ds td{padding:22px 24px 22px 0;border-bottom:1px solid #3a4c55;vertical-align:baseline;font-size:15px;color:#d9e3e2}
.ds td.n{font:600 26px/1.1 var(--serif);color:#fff;width:230px}
.ds td.n a:hover{color:var(--teal)}
.ds td.y{font:600 22px/1 var(--serif);color:var(--teal);width:190px;font-variant-numeric:tabular-nums}
.ds td.l{width:140px;text-align:right;padding-right:0}
.ds td.l a,.more{text-decoration:underline;text-underline-offset:3px;font-weight:600;font-size:14px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
blockquote{font:400 30px/1.3 var(--serif);border-left:4px solid var(--teal);padding-left:28px}
blockquote footer{font:500 14px var(--sans);color:var(--muted);margin-top:18px}
.search{margin-top:28px;border:1.5px solid var(--ink);border-radius:4px;display:flex;overflow:hidden}
.search input{flex:1;border:0;padding:16px 18px;font:400 15px var(--sans);color:var(--ink);min-width:0}
.search button{border:0;padding:16px 22px;background:var(--ink);color:#fff;font:600 14px var(--sans);cursor:pointer}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.chips button,.chips a{font:600 13px var(--sans);border:1px solid var(--line);border-radius:4px;padding:8px 12px;background:#fff;color:var(--ink);cursor:pointer}
.chips button[aria-pressed=true]{background:var(--ink);color:#fff;border-color:var(--ink)}
.ins{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:40px;border-top:2px solid var(--ink)}
.ins a{padding:24px 28px 28px 0;border-bottom:1px solid var(--line);display:block}
.ins a+a{padding-left:28px;border-left:1px solid var(--line)}
.ins time{font-size:13px;color:var(--muted);font-weight:500}
.ins h3{font:600 23px/1.25 var(--serif);margin-top:10px}
.ins a:hover h3{text-decoration:underline;text-decoration-color:var(--teal);text-underline-offset:4px}
.close{padding:0}
.close .wrap{display:grid;grid-template-columns:1fr 380px;align-items:center;gap:40px}
.close h2{font:600 48px/1.08 var(--serif);letter-spacing:-.015em;max-width:13em}
.close p{font:400 19px/1.5 var(--serif);color:#c5d2d2;margin:16px 0 30px;max-width:30em}
.close img{width:340px;margin:36px 0 36px auto;display:block;mix-blend-mode:lighten}
footer.site{border-top:1px solid var(--line)}
footer.site .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-top:48px;padding-bottom:28px;font-size:14px}
footer.site b{display:block;margin-bottom:12px;font-size:13px}
footer.site a{display:block;padding:4px 0;color:var(--muted)}footer.site a:hover{color:var(--ink)}
footer.site .legal{grid-column:1/-1;border-top:1px solid var(--line);padding-top:18px;font-size:12.5px;color:var(--muted);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
/* inner pages */
.crumb{font-size:13px;color:var(--muted);padding-top:22px;font-weight:500}
.crumb a{text-decoration:underline;text-underline-offset:3px}
.phead{display:grid;grid-template-columns:1fr 380px;gap:72px;padding-top:28px;padding-bottom:56px;align-items:end}
.phead h1{font-size:60px}
.phead .lead{margin-bottom:28px;max-width:32em}
.facts{border-top:2px solid var(--ink);font-size:14px}
.facts div{display:flex;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px solid var(--line)}
.facts dt{color:var(--muted);font-weight:500}.facts dd{font-weight:600;text-align:right}
.series{columns:2;column-gap:56px;list-style:none;padding:0;margin-top:32px;border-top:2px solid var(--ink)}
.series li{font:500 21px/1.3 var(--serif);padding:16px 0;border-bottom:1px solid var(--line);break-inside:avoid}
.cites{margin-top:28px;border-top:2px solid var(--ink)}
.cite{padding:18px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:70px 1fr auto;gap:20px;align-items:baseline}
.cite .yr{font:600 18px var(--serif);color:var(--teal-deep);font-variant-numeric:tabular-nums}
.cite h3{font:600 19px/1.3 var(--serif)}
.cite p{font-size:14px;color:var(--muted);margin-top:4px}
.cite .tg{font-size:12px;font-weight:600;color:var(--teal-deep)}
.cite a.o{font-size:13px;font-weight:600;text-decoration:underline;text-underline-offset:3px;white-space:nowrap}
.tools{display:grid;grid-template-columns:1fr 170px 190px;gap:12px;margin-top:32px}
.tools .search{margin-top:0}
select,.field input,.field select,.field textarea{font:400 15px var(--sans);color:var(--ink);border:1.5px solid var(--ink);border-radius:4px;padding:14px 14px;background:#fff;width:100%}
.count{font-size:14px;font-weight:600;margin-top:22px}
.count span{font-weight:400;color:var(--muted)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px;margin-top:8px}
.field{display:grid;gap:6px}.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600}
.field .err{font-size:13px;color:#B3261E;font-weight:500;min-height:0}
.field input[aria-invalid=true]{border-color:#B3261E}
.note{font-size:13px;color:var(--muted)}
.sent{background:var(--mist);padding:36px 40px;border-left:4px solid var(--teal)}
.sent h2{font:600 30px/1.2 var(--serif);margin-bottom:10px}
.sent pre{background:var(--ink);color:#d9e3e2;padding:20px 22px;border-radius:4px;font:13px/1.6 ui-monospace,Menlo,monospace;overflow:auto;margin-top:18px}
.aside-q{background:var(--mist);padding:36px 36px}
.aside-q blockquote{font-size:22px;border:0;padding:0}
@media (max-width:1000px){
 .wrap{padding:0 22px}.hero,.roles,.panel,.two,.close .wrap,.phead,.tools{grid-template-columns:1fr;gap:32px}
 .proof .wrap,footer.site .wrap{grid-template-columns:1fr 1fr}
 h1{font-size:46px}.phead h1{font-size:40px}h2.title{font-size:32px}section{padding:56px 0}
 .nav ul,.nav .acct{display:none}.nav.open ul{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#fff;padding:8px 22px 14px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(26,43,52,.08);z-index:5;gap:0}
 .nav.open ul a{display:block;padding:12px 0;font-size:16px}.nav.open .m-only{display:block}.nav.open .m-only:first-of-type{border-top:1px solid var(--line);margin-top:6px}
 .menu{display:block;font:600 14px var(--sans);background:none;border:1.5px solid var(--ink);border-radius:4px;padding:11px 14px}
 .row .name{width:120px;font-size:13px}.feeds{width:calc((100% - 120px) * .0639)}.feeds-label{right:calc((100% - 120px) * .0639 + 8px)}.axis{margin-left:120px}
 .roles button{font-size:20px}.panel{padding:28px 22px}.side{border-left:0;padding-left:0}
 .ds td.y,.ds th:nth-child(2){display:none}.ds td.n{width:auto;font-size:20px}.ds td.l{display:none}
 .ins{grid-template-columns:1fr}.ins a+a{padding-left:0;border-left:0}.series{columns:1}.form{grid-template-columns:1fr}
 .cite{grid-template-columns:54px 1fr}.cite a.o{grid-column:2}.close img{display:none}.close .wrap{padding-top:48px;padding-bottom:48px}
}

/* ---------- header */
.site-head{position:sticky;top:0;z-index:20;background:#fff}
.site-head::after{content:"";position:absolute;left:0;right:0;top:100%;height:10px;background:linear-gradient(rgba(26,43,52,.12),rgba(26,43,52,0));opacity:0;transition:opacity .2s;pointer-events:none}
.site-head.scrolled::after{opacity:1}
.m-only{display:none}
section[id],#datasets,#main{scroll-margin-top:96px}

/* ---------- hero chart: staggered bars, then the 1970 band */
.hero .row:nth-child(2) .bar{animation-delay:.08s}
.hero .row:nth-child(3) .bar{animation-delay:.16s}
.hero .row:nth-child(4) .bar{animation-delay:.24s}
.hero .row:nth-child(5) .bar{animation-delay:.32s}
.hero .row:nth-child(6) .bar{animation-delay:.4s}
.hero .feeds{transform-origin:50% 100%;animation:feeds .6s cubic-bezier(.2,.7,.2,1) 1.25s both}
.hero .feeds-label{animation:rise .45s ease-out 1.6s both}
@keyframes feeds{from{opacity:0;transform:scaleY(.15)}to{opacity:1;transform:none}}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* ---------- proof counters */
.proof b{font-variant-numeric:tabular-nums}

/* ---------- reveal on scroll */
.rv{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.rv.in{opacity:1;transform:none}

/* ---------- role panel */
.panel.swap>*{animation:fade .2s ease-out both}

/* ---------- hover nudges */
.ds td.n a{display:inline-block;transition:transform .15s ease-out}
.ds tr:hover td.n a,.ds td.n a:focus-visible{transform:translateX(4px)}
.cite h3{transition:transform .15s ease-out}
.cite:hover h3{transform:translateX(4px)}

/* ---------- library */
.countbar{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-top:22px}
.countbar .count{margin-top:0}
.clear{font:600 13px var(--sans);color:var(--ink);background:none;border:0;padding:6px 0;cursor:pointer;text-decoration:underline;text-decoration-color:var(--teal);text-underline-offset:3px;animation:fade .2s ease-out}
.clear:hover{color:var(--teal-deep)}
.cites.refresh{animation:fade .18s ease-out}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

/* ---------- demo form */
.sent:not([hidden]){animation:rise .4s ease-out both}
.field input.shake{animation:shake .32s ease-in-out}
@keyframes shake{20%,60%{transform:translateX(-5px)}40%,80%{transform:translateX(5px)}}

/* ---------- 404 */
.nf-in{padding:56px 0 110px;max-width:44em}
.nf-code{font:600 18px var(--sans);color:var(--teal-deep);letter-spacing:.12em;margin-bottom:14px}
.nf h1{font-size:60px}

/* ---------- small screens */
@media (max-width:1000px){.nf h1{font-size:40px}}
@media (max-width:600px){
 .nav{gap:16px;height:72px}.nav .right{gap:10px}.btn.small{padding:11px 12px;font-size:13px}.menu{padding:10px 11px}
 h1,.nf h1{font-size:38px}#main h1[style]{font-size:40px!important}.lead{font-size:19px}
 .proof .wrap{grid-template-columns:1fr;gap:14px}
 .roles button{font-size:18px;padding:15px 16px 15px 0}.panel h3{font-size:24px}
 .tools{gap:10px}
 .close h2{font-size:34px}blockquote{font-size:24px}.series li{font-size:18px}
 .ds td.n{font-size:18px}.sent{padding:26px 22px}
 .chart{padding-top:72px}.row .name{width:104px}.feeds{width:calc((100% - 104px) * .0639)}.feeds-label{right:calc((100% - 104px) * .0639 + 8px)}.axis{margin-left:104px}.bar span{font-size:13px;padding-left:6px}
}

/* ---------- reduced motion: everything off */
@media (prefers-reduced-motion:reduce){
 *,*::before,*::after{animation:none!important;transition:none!important}
 .rv{opacity:1;transform:none}
}