/* Field 52 — shared publication layer v2.0 (round 2)
   Layer 1 of 3.  field52.css (this file): tokens, type, chrome, shared primitives — every page.
                  field52-article.css: F2 information-page family composition.
                  page <style>: landing composition only (one landing per vertical).
   Breakpoints (use only these): 1180 compact desktop · 960 tablet / single column · 640 phone.
   No !important. No appended override passes. */

@font-face{font-family:"Fraunces";src:url("/assets/perf/fonts/ca04e6426b5f3960.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Fraunces";src:url("/assets/perf/fonts/e1a96b5745966a29.woff2") format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Inter";src:url("/assets/perf/fonts/5a67f5597b83cff1.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}

:root{
  --paper:#fbfaf6; --paper-2:#f3f1ea; --panel:#f2f0e8;
  --ink:#18231d; --ink-2:#3a463f; --muted:#646f69;
  --rule:#e3dfd4; --rule-2:#cdc8ba;
  --green:#1f4a37; --green-2:#2b6149; --on-green:#f3f5ef; --on-green-2:#bfd0c3;
  --heat:#b3623a; --cold:#3b6a86;
  --serif:"Fraunces","Iowan Old Style",Georgia,serif;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --content:1100px; --pad:40px;
  --flow:32px; --pause:96px;
  --r:2px;
  --arrow:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 15 10'%3E%3Cpath d='M0 5h13.2M9.3 1.2 13.2 5 9.3 8.8' fill='none' stroke='%23000' stroke-width='1.5'/%3E%3C/svg%3E");
}
.v-lawn{--panel:#f1efe4}
.v-plumbing{--panel:#f0efea}
.v-water{--panel:#ebf0ef}
.v-heat{--panel:#edf0ea}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
/* Keep descriptive alt text available to assistive technology without painting it
   inside photo slots while images are pending or unavailable. */
img{height:auto;font-size:0;color:transparent}
picture.photo-source{display:contents}
picture.photo-source>source{display:none}
a{color:inherit;text-decoration:none}
p,figure,blockquote,dl,dd{margin:0}
h1,h2,h3,h4,h5{margin:0;font-weight:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-60px;z-index:10;background:var(--green);color:var(--on-green);padding:8px 14px}
.skip:focus{top:12px}
.wrap{width:100%;max-width:calc(var(--content) + 2 * var(--pad));margin-inline:auto;padding-inline:var(--pad)}

/* ---------- type ---------- */
.h1,.h2,.h3,.h4,.h5,.serif{font-family:var(--serif);font-weight:400;font-variation-settings:"SOFT" 30,"WONK" 0;color:var(--ink)}
.h1,.h2,.h3,.h4{text-wrap:balance}
.h1{font-size:clamp(36px,4.3vw,62px);line-height:1.03;letter-spacing:-.017em;font-variation-settings:"SOFT" 30,"WONK" 0,"opsz" 60}
.h2{font-size:clamp(28px,2.75vw,40px);line-height:1.08;letter-spacing:-.011em}
.h3{font-size:clamp(23px,2vw,29px);line-height:1.14;letter-spacing:-.006em}
.h4{font-size:22px;line-height:1.2}
.h5{font-size:19px;line-height:1.26}
.kicker{font-family:var(--serif);font-style:italic;font-weight:400;font-size:16px;line-height:1.3;color:var(--green);font-variation-settings:"SOFT" 60,"WONK" 0}
.dek{font-size:18px;line-height:1.56;color:var(--ink-2);text-wrap:pretty}
.copy{font-size:15.5px;line-height:1.56;color:var(--ink-2);text-wrap:pretty}
.small{font-size:13.5px;line-height:1.45;color:var(--muted)}
.label{font-size:12.5px;font-weight:600;letter-spacing:.01em;color:var(--green)}

/* ---------- actions ---------- */
.go{display:inline-flex;align-items:center;gap:.5em;font-size:15px;font-weight:580;color:var(--green)}
.go::after{content:"";flex:none;width:15px;height:10px;background:currentColor;-webkit-mask:var(--arrow) no-repeat center/contain;mask:var(--arrow) no-repeat center/contain;transition:transform .15s ease}
.go:hover{color:var(--green-2)}
.go:hover::after{transform:translateX(3px)}
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 24px;border-radius:999px;border:1.5px solid var(--green);font-size:15.5px;font-weight:580;white-space:nowrap;transition:background-color .15s,color .15s}
.btn--solid{background:var(--green);color:var(--on-green)}
.btn--solid:hover{background:var(--green-2);border-color:var(--green-2)}
.btn--line{color:var(--green)}
.btn--line:hover{background:var(--green);color:var(--on-green)}
.tl{color:var(--green);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:rgba(31,74,55,.35)}
.tl:hover{text-decoration-color:currentColor}

/* Runtime-disabled actions (preview state). Rendered as non-interactive text, never as a live link.
   Markup: <span class="go is-off">Label <span class="state">Unavailable in preview</span></span> */
.is-off{cursor:default}
.go.is-off{color:var(--muted)}
.go.is-off::after{display:none}
.btn.is-off{border-color:var(--rule-2);background:transparent;color:var(--muted)}
.state{display:inline-block;margin-left:2px;padding:2px 8px 3px;border:1px solid var(--rule-2);border-radius:999px;font-size:11.5px;font-weight:600;line-height:1.3;color:var(--muted);white-space:nowrap}

/* Key: the plot-number box from the logo, used for sequences and figure keys only */
.key{display:inline-grid;place-items:center;flex:none;min-width:26px;height:26px;padding:0 5px;border:2px solid var(--green);border-radius:2px;font-family:var(--serif);font-size:15px;font-weight:600;line-height:1;color:var(--green);font-variant-numeric:lining-nums;font-variation-settings:"SOFT" 30,"WONK" 0,"opsz" 24}
.key--fill{background:var(--green);color:var(--on-green)}
.key--on{background:var(--paper)}
.key--s{min-width:20px;height:20px;padding:0 3px;border-width:1.5px;font-size:12px}

/* ---------- chrome ---------- */
.masthead{background:var(--paper);border-bottom:1px solid var(--rule)}
.masthead__in{max-width:min(1840px,94vw);display:flex;align-items:center;gap:26px;height:76px}
.brand{flex:none;display:block}
.brand img{height:30px;width:auto}
.brand-line{flex:none;font-size:12.5px;line-height:1.3;color:var(--muted);padding-left:18px;border-left:1px solid var(--rule-2);white-space:nowrap}
.nav{display:flex;gap:30px;margin-left:30px;align-self:stretch}
.nav a{position:relative;display:flex;align-items:center;font-size:15px;font-weight:500;color:var(--ink-2);white-space:nowrap}
.nav a:hover{color:var(--green)}
.nav a[aria-current="page"]{color:var(--green);font-weight:620}
.nav a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--green)}
.search{position:relative;margin-left:auto;width:272px}
.search input{width:100%;height:42px;padding:0 16px 0 40px;border:1px solid var(--rule-2);border-radius:999px;background:#fff;font-size:14.5px}
.search input::placeholder{color:var(--muted)}
.search svg{position:absolute;left:15px;top:13px;width:16px;height:16px;color:var(--muted)}
.search-link{display:none;margin-left:auto;width:40px;height:40px;place-items:center;border:1px solid var(--rule-2);border-radius:999px;color:var(--ink-2)}
.search-link svg{width:17px;height:17px}
.crumbs{padding-top:18px;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--green)}
.crumbs i{font-style:normal;margin:0 7px;color:var(--rule-2)}

/* ---------- shared objects ---------- */
/* Resolver bar: the one dark filled surface a page may carry. */
.bar{display:grid;grid-template-columns:1fr auto;align-items:center;column-gap:24px;min-height:76px;padding:17px 28px;border-radius:var(--r);background:var(--green);color:var(--on-green)}
a.bar:hover{background:var(--green-2)}
.bar__t{font-family:var(--serif);font-size:22px;line-height:1.2;font-variation-settings:"SOFT" 30,"WONK" 0}
.bar__s{grid-column:1;margin-top:3px;font-size:14.5px;line-height:1.45;color:var(--on-green-2)}
a.bar::after{content:"";grid-column:2;grid-row:1 / span 2;width:22px;height:14px;background:currentColor;-webkit-mask:var(--arrow) no-repeat center/contain;mask:var(--arrow) no-repeat center/contain}
.bar__state{grid-column:2;grid-row:1 / span 2;padding:5px 12px 6px;border:1px solid rgba(243,245,239,.38);border-radius:999px;font-size:12px;font-weight:600;color:var(--on-green-2);white-space:nowrap}
.bar-note{margin-top:12px;font-size:14px;line-height:1.5;color:var(--ink-2)}
.bar-note a{color:var(--green);font-weight:560;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(31,74,55,.35)}
.bar-links{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 22px;margin-top:12px;font-size:14px;color:var(--muted)}
.bar-links .go{font-size:14px;font-weight:540}
.bar-links a{color:var(--green);font-weight:540;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(31,74,55,.3)}

/* S1/S2 story: image, kicker, headline, dek, read-link. Unboxed. */
.story{display:flex;flex-direction:column;align-items:flex-start;min-width:0}
.story__img{display:block;width:100%;margin-bottom:15px;overflow:hidden;border-radius:var(--r);background:var(--paper-2)}
.story__img img{width:100%;aspect-ratio:var(--ar,3/2);object-fit:cover;object-position:var(--op,50% 50%)}
.story .kicker{margin-bottom:6px}
.story__title a:hover{color:var(--green)}
.story__dek{margin-top:9px;font-size:15.5px;line-height:1.55;color:var(--ink-2);text-wrap:pretty}
.story .go{margin-top:13px}

/* Section head: compact left stack + optional action */
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:26px}
.head__txt{max-width:700px}
.head__txt .kicker{margin-bottom:8px}
.head__txt p{margin-top:10px;font-size:16.5px;line-height:1.5;color:var(--ink-2)}
.head > .go{flex:none;margin-bottom:4px}

/* S3 index row */
.ix{border-top:1px solid var(--rule)}
.ix li{border-bottom:1px solid var(--rule)}
.ix a{display:grid;grid-template-columns:var(--ix-label,112px) 1fr 15px;column-gap:20px;align-items:baseline;padding:15px 0 14px}
.ix a::after{content:"";align-self:center;width:15px;height:10px;background:var(--green);-webkit-mask:var(--arrow) no-repeat center/contain;mask:var(--arrow) no-repeat center/contain;transition:transform .15s ease}
.ix a:hover::after{transform:translateX(3px)}
.ix__label{font-size:12.5px;font-weight:600;color:var(--green)}
.ix__title{font-family:var(--serif);font-size:19px;line-height:1.26;font-variation-settings:"SOFT" 30,"WONK" 0}
.ix a:hover .ix__title{color:var(--green)}
.ix__dek{display:block;margin-top:3px;font-family:var(--sans);font-size:14px;line-height:1.45;color:var(--muted)}
.ix--plain a{grid-template-columns:1fr 15px;column-gap:14px}

/* Photo frame + optional italic caption over a scrim */
.ph{position:relative;overflow:hidden;background:var(--paper-2)}
.ph img{width:100%;height:100%;object-fit:cover;object-position:var(--op,50% 50%)}
.ph__cap{position:absolute;left:30px;bottom:28px;z-index:1;max-width:280px;font-family:var(--serif);font-style:italic;font-size:21px;line-height:1.24;color:#fff;font-variation-settings:"SOFT" 60,"WONK" 0}
.ph__cap::after{content:"";display:block;width:38px;height:1.5px;margin-top:13px;background:currentColor;opacity:.8}
.ph--scrim::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(12,22,16,.5) 0%,rgba(12,22,16,0) 42%)}
.figcap{margin-top:9px;font-size:13px;line-height:1.45;color:var(--muted)}

/* Closing note row (verify-before-fit, before-you-choose, availability) */
.endnote{display:grid;grid-template-columns:200px minmax(0,1fr);column-gap:32px;margin-top:44px;padding-top:16px;border-top:1px solid var(--rule);font-size:14px;line-height:1.5;color:var(--muted)}
.endnote strong{font-weight:600;color:var(--ink)}

/* ---------- footer ---------- */
.foot .wrap{max-width:min(1840px,94vw)}
.foot{margin-top:var(--pause);border-top:1px solid var(--rule-2)}
.foot__top{display:grid;grid-template-columns:200px 1fr auto;gap:20px 48px;align-items:start;padding:28px 0 26px;border-bottom:1px solid var(--rule)}
.foot__top img{height:24px;width:auto;margin-top:2px}
.foot__trust{max-width:600px;font-size:14.5px;line-height:1.55;color:var(--ink-2)}
.foot__trust a{color:var(--green);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(31,74,55,.35)}
.foot__topics{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;font-weight:520;color:var(--ink-2)}
.foot__base{display:flex;justify-content:space-between;gap:12px 20px;padding:18px 0 42px;font-size:13px;color:var(--muted)}
.foot__base nav{display:flex;flex-wrap:wrap;gap:8px 22px}
.foot a:hover{color:var(--green)}

/* ---------- responsive (system level) ---------- */
@media (max-width:1180px){
  .brand-line{display:none}
  .search{width:220px}
  .nav{gap:24px;margin-left:12px}
}
@media (max-width:960px){
  :root{--pause:80px}
  .head{flex-direction:column;align-items:flex-start;gap:12px}
  .foot__top{grid-template-columns:minmax(0,1fr)}
  .endnote{grid-template-columns:minmax(0,1fr);row-gap:4px}
}
@media (max-width:640px){
  :root{--pad:20px;--pause:64px;--flow:24px}
  .masthead__in{flex-wrap:wrap;height:auto;padding-block:12px 0;gap:10px 16px}
  .brand img{height:24px}
  .search{display:none}
  .search-link{display:grid}
  .nav{order:3;width:100%;margin:0 -20px;padding:0 20px;gap:22px;overflow-x:auto;scrollbar-width:none;height:44px;border-top:1px solid var(--rule)}
  .nav::-webkit-scrollbar{display:none}
  .dek{font-size:17px}
  .bar{padding:15px 18px;column-gap:14px}
  .bar__t{font-size:19px}
  .bar__state{grid-column:1;grid-row:auto;justify-self:start;margin-top:10px}
  .foot__base{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){.go::after,.ix a::after,.btn{transition:none}}

@media(max-width:960px){.masthead__in,.foot .wrap{max-width:100%}}