/* pollution ends. v3: Cleaner Air. Shared chrome, inner pages, library and posts. */
:root{
  --bg:#FFFFFF;--tint:#F2F6F3;--tint2:#E6EEE9;--ink:#17211C;--ink2:#45524B;--ink3:#5E6B64;
  --green:#1E6B44;--green-d:#14502F;--sage:#8FA89A;--sky:#DDEBF2;--haze:#B49A72;--amber:#C98848;
  --line:rgba(23,33,28,.14);--line2:rgba(23,33,28,.28);
  --f-d:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;
  --f-r:"Source Serif 4",Georgia,"Times New Roman",serif;
  --f-m:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --wrap:1240px;--gut:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 18px/1.62 var(--f-r);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,video,svg,canvas{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--f-d);font-weight:700;line-height:1.08;margin:0;letter-spacing:-.01em;text-wrap:balance;color:var(--ink)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--f-m);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;font-weight:500}
.kick{color:var(--green);margin:0 0 .7rem}
.lede{font-size:1.12rem;color:var(--ink2);max-width:40em}
:focus-visible{outline:3px solid var(--green);outline-offset:3px;border-radius:2px}
main:focus{outline:none}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:#fff;padding:10px 14px;font:600 14px var(--f-d);text-decoration:none}
.skip:focus{top:10px}

/* utility bar and the group launcher */
.util{background:var(--tint);border-bottom:1px solid var(--line);font-family:var(--f-d);font-size:14px;position:relative;z-index:30}
.util-in{display:flex;align-items:center;gap:18px;min-height:42px}
.util-series{margin:0;color:var(--ink3);flex:1;text-align:center}
.util-sep{margin:0 .5em;color:var(--sage)}
.util-nav{display:flex;gap:18px}
.util-nav a{text-decoration:none;color:var(--ink2)}
.util-nav a:hover,.util-nav a[aria-current]{color:var(--green);text-decoration:underline;text-underline-offset:4px}
.launch{position:relative}
.launch summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:9px;padding:6px 12px 6px 8px;border:1px solid var(--line2);border-radius:999px;background:#fff;font-weight:600;font-size:13.5px;white-space:nowrap}
.launch summary::-webkit-details-marker{display:none}
.launch summary:hover{border-color:var(--green);color:var(--green)}
.launch-dots{display:grid;grid-template-columns:repeat(2,5px);gap:3px}
.launch-dots i{width:5px;height:5px;border-radius:50%;background:var(--green)}
.launch-dots i:nth-child(2),.launch-dots i:nth-child(3){background:var(--sage)}
.launch[open] summary{background:var(--ink);color:#fff;border-color:var(--ink)}
.launch[open] .launch-dots i{background:#fff}
.launch-panel{position:absolute;left:0;top:calc(100% + 10px);width:min(920px,calc(100vw - 2*var(--gut)));max-height:min(70vh,640px);overflow:auto;background:#fff;border:1px solid var(--line2);box-shadow:0 24px 60px -20px rgba(23,33,28,.35);padding:22px 24px;z-index:40}
.launch-h{font:700 1.2rem var(--f-d);margin:0 0 14px}
.launch-cols{columns:4 180px;column-gap:26px}
.lg{break-inside:avoid;margin:0 0 16px}
.lg h4{font:500 11px/1.3 var(--f-m);letter-spacing:.1em;text-transform:uppercase;color:var(--green);margin:0 0 6px;padding-bottom:5px;border-bottom:1px solid var(--line)}
.lg a{display:block;padding:3px 0;text-decoration:none;color:var(--ink2);font-size:14px}
.lg a:hover{color:var(--green);text-decoration:underline}
.lg a[aria-current]{color:var(--green);font-weight:700}
.lg a[aria-current]::after{content:" (this site)";font-weight:400;color:var(--ink3);font-size:12px}

/* masthead */
.mast{position:sticky;top:0;z-index:25;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.2) blur(8px);-webkit-backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line)}
.mast-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:inline-flex;align-items:center;flex:none;text-decoration:none}
.brand img{height:30px;width:auto}
.mainnav ol{display:flex;gap:4px;align-items:center}
.mainnav a{display:inline-flex;gap:8px;align-items:baseline;padding:9px 12px;text-decoration:none;font:600 15.5px var(--f-d);color:var(--ink);border-radius:2px}
.mainnav a .mono{color:var(--green);font-size:11px}
.mainnav a:hover{background:var(--tint)}
.mainnav .nav-lib a{border:1.5px solid var(--ink);margin-left:8px}
.mainnav .nav-lib a:hover,.mainnav .nav-lib a[aria-current]{background:var(--ink);color:#fff}
.airline{height:3px;background:linear-gradient(90deg,var(--haze),var(--sage));position:relative}
.airline i{position:absolute;inset:0 auto 0 0;width:var(--read,0%);background:var(--green);transition:width .1s linear}

/* buttons and chips */
.btn{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 20px;font:650 15.5px var(--f-d);text-decoration:none;border:1.5px solid var(--ink);cursor:pointer;border-radius:999px;transition:background .2s,color .2s,transform .2s var(--ease)}
.btn-solid{background:var(--green);border-color:var(--green);color:#fff}
.btn-solid:hover{background:var(--green-d);border-color:var(--green-d)}
.btn-line{background:#fff;color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.btn:active{transform:translateY(1px)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{cursor:pointer;border:1px solid var(--line2);background:#fff;padding:8px 14px;border-radius:999px;font:600 14px var(--f-d);color:var(--ink2);transition:background .2s,color .2s,border-color .2s}
.chip span{font:500 11px var(--f-m);color:var(--ink3);margin-left:4px}
.chip:hover{border-color:var(--green);color:var(--green)}
.chip[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:#fff}
.chip[aria-pressed="true"] span{color:#DCEBE2}

/* cards */
.c{display:flex;flex-direction:column;height:100%;text-decoration:none;background:#fff;border:1px solid var(--line);transition:border-color .2s,transform .3s var(--ease),box-shadow .3s}
.c:hover{border-color:var(--green);transform:translateY(-3px);box-shadow:0 18px 30px -24px rgba(23,33,28,.5)}
.c-ph{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--tint2)}
.c-ph img{width:100%;height:100%;object-fit:cover;filter:saturate(.85) contrast(1.02);transition:transform .6s var(--ease),filter .4s}
.c:hover .c-ph img{transform:scale(1.04);filter:none}
.c-b{display:flex;flex-direction:column;gap:6px;padding:14px 16px 18px}
.c-k{font:500 10.5px var(--f-m);letter-spacing:.1em;text-transform:uppercase;color:var(--green)}
.c-t{font:700 1.12rem/1.2 var(--f-d);margin:0;color:var(--ink)}
.c-x{font-size:.93rem;line-height:1.5;color:var(--ink2)}
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* prose */
.prose{font-size:1.1rem;line-height:1.72}
.prose p{margin:0 0 1.1em}
.prose h3{font-size:1.3rem;margin:1.8em 0 .5em}
.prose a{color:var(--green);text-underline-offset:3px}
.prose .back a{font:650 15px var(--f-d);text-decoration:none;border-bottom:2px solid var(--green)}

/* inner pages */
.inner{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px 64px;padding-top:56px;padding-bottom:80px}
.inner-head{grid-column:1/-1;border-bottom:1px solid var(--ink);padding-bottom:22px}
.inner-head h1{font-size:clamp(2.2rem,5vw,3.8rem)}
.inner-body{max-width:44em}
.inner-side{border-left:1px solid var(--line);padding-left:24px;align-self:start}
.inner-side>.mono{color:var(--ink3);margin:0 0 10px}
.ends.ends--stack{display:flex;flex-direction:column;gap:2px}
.ends--stack a{display:flex;flex-direction:column;padding:8px 0;border-bottom:1px solid var(--line);text-decoration:none}
.ends--stack b{font:700 1.05rem var(--f-d)}
.ends--stack span{font:500 11px var(--f-m);letter-spacing:.06em;text-transform:uppercase;color:var(--ink3)}
.ends--stack a[aria-current] b{color:var(--green)}

/* posts */
.readbar{position:fixed;left:0;right:0;bottom:0;height:4px;z-index:20;background:transparent}
.readbar i{display:block;height:100%;width:var(--read,0%);background:var(--green)}
.post{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:0 64px;padding-top:48px;padding-bottom:40px}
.post-head{grid-column:1/-1;max-width:56em}
.post-kick{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:14px}
.post-kick .mono{color:var(--ink3)}
.tag{display:inline-block;background:var(--green);color:#fff;text-decoration:none;font:600 13px var(--f-d);padding:5px 12px;border-radius:999px}
.tag:hover{background:var(--green-d)}
.post-head h1{font-size:clamp(2rem,4.6vw,3.6rem)}
.post-meta{color:var(--ink3);margin:16px 0 0}
.lead-fig{grid-column:1/-1;margin:28px 0 34px}
.lead-frame{display:block;overflow:hidden;background:var(--tint2);aspect-ratio:21/9;position:relative}
.lead-frame img{width:100%;height:100%;object-fit:cover;transform:scale(1.06);filter:sepia(.35) saturate(.75) blur(3px);transition:transform 1.6s var(--ease),filter 1.6s var(--ease)}
.is-clear .lead-frame img{transform:scale(1);filter:none}
.lead-fig figcaption{font:400 13px/1.5 var(--f-r);color:var(--ink3);margin-top:8px}
.lead-fig figcaption .mono{color:var(--green);margin-right:6px}
.post-body{max-width:40em}
.post-body>p:first-of-type::first-letter{font:800 3.4em/0.8 var(--f-d);float:left;margin:.08em .1em 0 0;color:var(--green)}
.post-side{align-self:start;position:sticky;top:100px}
.share{border-top:1px solid var(--ink);padding-top:12px}
.share>.mono{color:var(--ink3);margin:0 0 8px}
.share ul{display:flex;flex-wrap:wrap;gap:6px}
.share a,.share button{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border:1px solid var(--line2);border-radius:999px;background:#fff;text-decoration:none;font:600 13px var(--f-d);cursor:pointer}
.share a:hover,.share button:hover{background:var(--green);border-color:var(--green);color:#fff}
.share-said{min-height:1.4em;font:500 12px var(--f-m);color:var(--green);margin:8px 0 0}
.share-note{font-size:12.5px;line-height:1.5;color:var(--ink3)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:10px}
.pn{display:flex;flex-direction:column;gap:6px;padding:18px 0;border-top:2px solid var(--ink);text-decoration:none;font:700 1.12rem/1.25 var(--f-d)}
.pn .mono{color:var(--green)}
.pn-next{text-align:right}
.pn:hover span:last-child{text-decoration:underline;text-underline-offset:4px}
.related{padding:46px var(--gut) 80px}
.related h2{font-size:1.6rem;margin-bottom:20px}

/* library */
.lib{padding-top:52px;padding-bottom:80px}
.lib-head{border-bottom:1px solid var(--ink);padding-bottom:22px;margin-bottom:24px}
.lib-head h1{font-size:clamp(2.2rem,5vw,3.8rem);margin-bottom:14px}
.lib-tools{position:sticky;top:76px;z-index:10;background:rgba(255,255,255,.96);padding:14px 0;border-bottom:1px solid var(--line);display:grid;gap:12px}
.lib-search{display:flex;flex-direction:column;gap:6px;max-width:560px}
.lib-search .mono{color:var(--ink3)}
.lib-search input{font:500 17px var(--f-d);padding:12px 16px;border:1.5px solid var(--ink);border-radius:999px;background:#fff;color:var(--ink);width:100%}
.lib-status{color:var(--ink3);margin:0}
.lib-sec{padding-top:34px}
.lib-sec h2{font-size:1.7rem;margin-bottom:16px;display:flex;align-items:baseline;gap:12px;scroll-margin-top:240px}
.lib-sec h2 .mono{color:var(--green)}
.lib-n{font:500 13px var(--f-m);color:var(--ink3)}
.lib-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.lib-grid li[hidden],.lib-sec[hidden]{display:none}
.lib-empty{padding:40px 0;font-size:1.1rem;color:var(--ink2)}
.lib-credits{margin-top:56px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--ink3)}
.lib-credits summary{cursor:pointer;font:600 14px var(--f-d);color:var(--ink2)}
.lib-credits ul{margin:10px 0 0 18px;list-style:disc}

/* footer */
.foot{margin-top:40px;background:var(--tint);border-top:1px solid var(--line);padding:46px 0 34px;font-family:var(--f-d);font-size:15px}
.foot-ends{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:30px}
.foot-ends h2{font-size:11px;color:var(--ink3);margin-bottom:12px}
.ends{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.ends a{display:flex;flex-direction:column;gap:3px;padding:12px 14px;background:#fff;border:1px solid var(--line);text-decoration:none;height:100%;transition:border-color .2s}
.ends a:hover{border-color:var(--green)}
.ends b{font-weight:700;font-size:1rem;letter-spacing:-.01em}
.ends span{font:500 10.5px var(--f-m);letter-spacing:.06em;text-transform:uppercase;color:var(--ink3)}
.ends a[aria-current]{border-color:var(--green);box-shadow:inset 0 -3px 0 var(--green)}
.ends a[aria-current] b{color:var(--green)}
.foot-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot-cols h3{font-size:11px;color:var(--ink3);margin-bottom:10px}
.foot-cols li a{display:inline-block;padding:3px 0;text-decoration:none;color:var(--ink2)}
.foot-cols li a:hover{color:var(--green);text-decoration:underline}
.foot-brand p{margin:12px 0 0;color:var(--ink2)}
.foot-note{font:400 14px/1.55 var(--f-r);max-width:30em}
.foot-base{margin:34px 0 0;padding-top:18px;border-top:1px solid var(--line);font:400 13px/1.6 var(--f-r);color:var(--ink3)}

/* motion: the haze lift reveal */
.js .reveal{opacity:0;filter:blur(6px) sepia(.4);transform:translateY(18px);transition:opacity .9s var(--ease),filter 1.1s var(--ease),transform .9s var(--ease);transition-delay:calc(var(--n,0)*70ms)}
.js .reveal.in{opacity:1;filter:none;transform:none}

@media (max-width:980px){
  .mainnav .mono{display:none}
  .util-series{display:none}
  .util-in{justify-content:space-between}
  .inner,.post{grid-template-columns:1fr}
  .inner-side{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px}
  .post-side{position:static;margin-top:20px}
  .ends{grid-template-columns:repeat(3,1fr)}
  .cards3{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  body{font-size:17px}
  .mast-in{flex-direction:column;align-items:flex-start;gap:6px;min-height:0;padding-top:10px;padding-bottom:8px}
  .mainnav{width:100%;overflow-x:auto;scrollbar-width:none}
  .mainnav::-webkit-scrollbar{display:none}
  .mainnav ol{flex-wrap:nowrap}
  .mainnav a{padding:7px 10px;font-size:14.5px;white-space:nowrap}
  .mainnav .nav-lib a{margin-left:2px}
  .brand img{height:26px}
  .util-nav{gap:12px;font-size:13px}
  .launch summary{font-size:12.5px;padding:5px 10px 5px 7px}
  .launch-panel{position:fixed;left:var(--gut);right:var(--gut);top:52px;width:auto;max-height:75vh}
  .ends{grid-template-columns:1fr 1fr}
  .foot-cols{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1/-1}
  .cards3{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .pn-next{text-align:left}
  .lead-frame{aspect-ratio:4/3}
  .lib-tools{top:0;position:relative}
  .lib-sec h2{scroll-margin-top:130px}
  html{scroll-padding-top:130px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal{opacity:1;filter:none;transform:none}
  .lead-frame img{transform:none;filter:none}
}
@media print{
  .util,.mast,.foot,.post-side,.post-nav,.related,.readbar{display:none!important}
  .post{display:block}
  .lead-frame img{filter:none;transform:none}
  main a[href^="http"]::after{content:" <" attr(href) ">";font-size:9pt;word-break:break-all}
}