/* Steel & Oil: Anshan-Houston Industrial Memory Archive
   Hand-written CSS. No framework. One file.
   Register: a university special-collections finding aid that happens to be a website.
   Lineage: Densho Digital Repository (consent-forward sobriety), the Met online
   collection (catalog density, quiet object record), a scholarly critical edition
   (parallel bilingual text), a special-collections finding aid (accession IDs,
   serif body, hairline rules, square corners).
   Brand: iron-oxide red on charcoal ink, warm paper. Color is rationed.
*/

:root{
  /* ---- material ---- */
  --paper:#FAF6EE;
  --paper-2:#F3EEE4;
  --ink:#211C1A;
  --ink-soft:#4A423D;
  --muted:#6A625C;
  --rule:#E3DAC9;
  --rule-2:#EFE8DA;
  --oxide:#7C1C27;
  --oxide-deep:#621520;
  --oxide-tint:#F6EAE6;
  --oxide-line:#D9B8B4;
  --steel:#2F3A40;
  --steel-tint:#E9ECEA;
  --field:#3E5C46;
  --field-tint:#EDF1EC;
  --field-line:#C7D3C6;

  /* ---- type ---- */
  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --display:"Spectral", Georgia, serif;
  --sans:"Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --cjk:"Songti SC", "Noto Serif CJK SC", "Noto Serif SC", "SimSun", "PingFang SC", serif;
  --cjk-sans:"PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --measure:42rem;      /* English reading measure ~72ch */
  --measure-zh:38em;    /* Chinese measure ~34 chars */

  /* ---- spacing scale (8px base) ---- */
  --s1:.25rem; --s2:.5rem; --s3:.75rem; --s4:1rem; --s5:1.5rem;
  --s6:2rem; --s7:3rem; --s8:4rem; --s9:6rem;

  /* ---- widths ---- */
  --w-page:72rem;
}

*{box-sizing:border-box;}
html{scroll-behavior:auto;}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth;}}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--serif);
  font-size:18px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  font-variant-ligatures:common-ligatures;
}
.wrap{max-width:var(--w-page);margin:0 auto;padding:0 var(--s6);}
a{color:var(--oxide);text-underline-offset:3px;text-decoration-thickness:1px;}
a:hover{color:var(--oxide-deep);text-decoration-thickness:1.5px;}
a:visited{color:var(--oxide);}
.mono{font-family:var(--mono);font-size:.86em;letter-spacing:.01em;font-variant-numeric:tabular-nums;}
:lang(zh-Hans),.cjk{font-family:var(--cjk);font-style:normal;}

/* ---- accessibility: skip link + focus ---- */
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--paper);
  font-family:var(--sans);font-size:.85rem;padding:.6rem 1rem;z-index:50;}
.skip:focus{left:.5rem;top:.5rem;color:var(--paper);}
:focus-visible{outline:2px solid var(--oxide);outline-offset:2px;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--oxide);outline-offset:2px;}

/* ---- hairline ornaments ---- */
.rule-double{border-bottom:2px solid var(--ink);box-shadow:0 5px 0 -4px var(--rule);}

/* ---------------------------------------------------------- masthead */
.masthead{background:var(--paper);}
.mast-row{
  display:flex;align-items:center;justify-content:space-between;gap:var(--s5);
  padding:1.1rem var(--s6) 1.2rem;flex-wrap:wrap;max-width:var(--w-page);margin:0 auto;
}
.wordmark{display:inline-flex;border:0;}
.wm{display:block;}
.topnav{display:flex;gap:1.4rem;font-family:var(--sans);font-size:.78rem;
  text-transform:uppercase;letter-spacing:.1em;align-items:center;}
.topnav a{color:var(--ink-soft);border:0;text-decoration:none;padding-bottom:2px;}
.topnav a:hover{color:var(--oxide);}
.topnav a[aria-current="page"]{color:var(--ink);border-bottom:2px solid var(--oxide);}
.topnav .nav-data{font-family:var(--mono);font-size:.72rem;text-transform:none;letter-spacing:.02em;
  padding:.2rem .5rem;border:1px solid var(--rule);color:var(--muted);}
.topnav .nav-data:hover{border-color:var(--oxide);color:var(--oxide);}

/* ---------------------------------------------------------- intro / title page */
.intro{border-bottom:1px solid var(--rule);}
.intro .wrap{padding:var(--s9) var(--s6) var(--s7);}
.eyebrow{font-family:var(--sans);font-size:.74rem;text-transform:uppercase;
  letter-spacing:.18em;color:var(--oxide);margin:0 0 var(--s4);}
.intro-title{
  font-family:var(--display);font-weight:600;font-size:2.875rem;line-height:1.08;
  letter-spacing:-.015em;margin:0 0 var(--s5);max-width:24ch;color:var(--ink);
}
.intro-lede{font-size:1.16rem;line-height:1.6;max-width:48rem;margin:0 0 var(--s5);color:var(--ink-soft);}
.intro-links{display:flex;flex-wrap:wrap;gap:1.4rem;align-items:center;margin:0 0 var(--s5);
  padding-top:var(--s4);border-top:1px solid var(--rule);
  font-family:var(--sans);font-size:.8125rem;text-transform:uppercase;letter-spacing:.08em;}
.intro-links a{border:0;text-decoration:none;color:var(--oxide);font-weight:600;}
.intro-links a:hover{color:var(--oxide-deep);}
.intro-links a::after{content:" \2192";}
.intro-links a.cta-primary{background:var(--oxide);color:var(--paper);padding:.5rem .95rem;}
.intro-links a.cta-primary:hover{background:var(--oxide-deep);color:var(--paper);}
.intro-meta{font-family:var(--mono);font-size:.75rem;color:var(--muted);max-width:60rem;margin:0;
  padding:0 0 .7rem;border-bottom:1px solid var(--rule-2);line-height:1.5;}
.intro-meta em{font-family:var(--serif);}

/* ---------------------------------------------------------- band headings */
.band{
  font-family:var(--sans);font-size:.8rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.16em;color:var(--muted);margin:0 0 var(--s5);padding-bottom:var(--s2);
  border-bottom:1px solid var(--rule);
}

/* ---------------------------------------------------------- census (was impact) */
.impact-sec{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:var(--paper-2);}
.impact-sec .wrap{padding:var(--s6) var(--s6);}
.census-title{font-family:var(--sans);font-size:.8rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.16em;color:var(--muted);margin:0 0 var(--s4);}
.impact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);}
.impact-cell{background:var(--paper-2);padding:var(--s5) var(--s5) var(--s5);}
.impact-num{font-family:var(--display);font-weight:500;font-size:2.375rem;line-height:1;
  color:var(--oxide);letter-spacing:-.015em;font-variant-numeric:tabular-nums;}
.impact-label{font-family:var(--sans);font-size:.78rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.1em;color:var(--ink);margin:.55rem 0 .3rem;}
.impact-note{font-size:.875rem;line-height:1.45;color:var(--muted);}
.impact-rule{font-family:var(--sans);font-size:.9rem;line-height:1.55;color:var(--muted);
  margin:var(--s5) 0 0;max-width:58rem;}

/* ---------------------------------------------------------- map */
.map-sec .wrap{padding:var(--s7) var(--s6);}
.locator{margin:0;}
.locator svg{width:100%;height:auto;border:1px solid var(--rule);background:var(--paper-2);}
.locator figcaption{font-family:var(--sans);font-size:.85rem;color:var(--muted);
  margin-top:var(--s3);max-width:52rem;line-height:1.5;}

/* ---------------------------------------------------------- catalog */
.catalog .wrap{padding:var(--s7) var(--s6) var(--s8);}
.count-line{font-family:var(--sans);font-size:.95rem;color:var(--muted);margin:0 0 var(--s5);}
.count-line #count{color:var(--oxide);font-weight:700;font-variant-numeric:tabular-nums;}

.controls{display:flex;flex-direction:column;gap:var(--s4);margin-bottom:var(--s6);}
.controls-label{font-family:var(--sans);font-size:.8125rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.12em;color:var(--steel);margin:0;}
#q{
  font-family:var(--sans);font-size:1rem;padding:.7rem .9rem;width:100%;max-width:34rem;
  border:1px solid var(--ink-soft);background:#fff;border-radius:0;color:var(--ink);
}
#q::placeholder{font-family:var(--mono);font-size:.85rem;color:var(--muted);}
#q:focus{outline:2px solid var(--oxide);outline-offset:1px;border-color:var(--oxide);}
.facets{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;}
.facet-label{font-family:var(--sans);font-size:.72rem;text-transform:uppercase;
  letter-spacing:.12em;color:var(--muted);margin-right:.5rem;min-width:3rem;}
.facet{
  font-family:var(--sans);font-size:.82rem;padding:.32rem .8rem;cursor:pointer;
  border:1px solid var(--rule);background:#fff;color:var(--ink-soft);border-radius:0;
}
.facet:hover{border-color:var(--oxide);color:var(--oxide);}
.facet.on,.facet[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.noresult{font-family:var(--sans);color:var(--muted);font-style:italic;}

/* record grid: 1px hairline gutters on a rule ground (the finding-aid move) */
.records{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(19rem,1fr));
  gap:1px;background:var(--rule);border:1px solid var(--rule);
}
.rec{background:var(--paper);}
.rec[hidden]{display:none;}
.rec-link{display:block;padding:var(--s5) var(--s5) var(--s6);text-decoration:none;color:inherit;border:0;height:100%;}
.rec-link:hover{background:#fff;}
.rec-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:.7rem;}
.rec-id{color:var(--oxide);font-weight:600;}
.rec-type{font-family:var(--sans);font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);}
.rec-thumb{margin:.4rem 0 .7rem;}
.rec-thumb img{width:100%;aspect-ratio:4/3;object-fit:contain;background:var(--paper-2);
  border:1px solid var(--rule);padding:.4rem;display:block;}
.rec-title{font-family:var(--display);font-weight:600;font-size:1.18rem;line-height:1.22;
  margin:0 0 .35rem;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.rec-cjk{font-family:var(--cjk);font-size:1rem;color:var(--ink-soft);margin-bottom:.5rem;}
.rec-dek{font-size:.95rem;line-height:1.5;color:var(--ink-soft);margin:0 0 .9rem;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.rec-meta{font-family:var(--sans);font-size:.78rem;color:var(--muted);margin-bottom:.7rem;}
.rec-meta .dot{margin:0 .45rem;color:var(--rule);}
.rec-tags{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;}

.mini-illus{font-family:var(--sans);font-size:.68rem;text-transform:uppercase;letter-spacing:.07em;
  color:var(--oxide);border:1px dashed var(--oxide-line);padding:.16rem .5rem;border-radius:0;}
.mini-field{font-family:var(--sans);display:inline-block;background:var(--field-tint);color:var(--field);
  border:1px solid var(--field-line);border-radius:0;padding:.16rem .5rem;font-size:.68rem;
  text-transform:uppercase;letter-spacing:.06em;}

/* ---------------------------------------------------------- item page */
.item{padding:var(--s6) var(--s6) var(--s8);}
.item-topbar{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;
  border-bottom:1px solid var(--rule);padding-bottom:.7rem;margin-bottom:var(--s5);}
.crumb{font-family:var(--sans);font-size:.78rem;color:var(--muted);
  text-transform:uppercase;letter-spacing:.08em;}
.crumb a{border:0;}
.crumb span{margin:0 .5rem;color:var(--rule);}
.item-topbar .topbar-id{font-family:var(--mono);font-size:.8rem;color:var(--oxide);}

.field-banner,.illus-banner{font-family:var(--sans);font-size:.8125rem;line-height:1.5;
  padding:.75rem 1rem;margin-bottom:var(--s6);border-radius:0;}
.field-banner{color:var(--field);background:var(--field-tint);border-left:3px solid var(--field);}
.illus-banner{color:var(--oxide-deep);background:var(--oxide-tint);border-left:3px solid var(--oxide);}
.banner-lead{font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-right:.4em;}

.item-head{border-bottom:2px solid var(--ink);box-shadow:0 3px 0 -1px var(--rule);
  padding-bottom:var(--s5);margin-bottom:var(--s6);}
.item-kicker{display:flex;flex-wrap:wrap;gap:.8rem;align-items:center;
  font-family:var(--sans);font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;
  color:var(--muted);margin-bottom:var(--s3);}
.item-kicker .id{color:var(--oxide);font-weight:600;letter-spacing:.03em;}
.type-tag,.case-tag{padding:.15rem .55rem;border:1px solid var(--rule);border-radius:0;}
.item-head h1{font-family:var(--display);font-weight:600;font-size:1.75rem;line-height:1.22;
  letter-spacing:-.01em;margin:0 0 .5rem;max-width:34ch;}
.cjk-title{font-family:var(--cjk);font-size:1.25rem;color:var(--ink-soft);margin-bottom:.7rem;}
.cjk-title .pinyin{font-family:var(--serif);font-style:italic;font-size:1rem;color:var(--muted);margin-left:.5rem;}
.dek{font-size:1.1rem;color:var(--ink-soft);max-width:var(--measure);margin:.4rem 0 1rem;}
.badges{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;}
.date-tag{font-family:var(--sans);font-size:.78rem;color:var(--muted);}

.item-cols{display:grid;grid-template-columns:minmax(0,1fr) 19rem;gap:var(--s8);align-items:start;}
.item-main{max-width:var(--measure);min-width:0;}
.item-main p{margin:0 0 1.05rem;}
.sec{font-family:var(--sans);font-size:.8125rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.12em;color:var(--steel);margin:var(--s7) 0 var(--s4);padding-bottom:.35rem;
  border-bottom:1px solid var(--rule);}
.sec:first-of-type{margin-top:0;}
.sec .rule-note{font-weight:400;text-transform:none;letter-spacing:0;font-style:italic;
  color:var(--muted);font-size:.84rem;margin-left:.6rem;}

.prov{margin:0;}
.prov dt{font-family:var(--sans);font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--steel);margin-top:.9rem;}
.prov dd{margin:.2rem 0 0;color:var(--ink-soft);}

ul.evidence{list-style:none;padding:0;margin:0;}
ul.evidence li{padding:.4rem 0 .4rem 1.3rem;position:relative;font-size:.96rem;color:var(--ink-soft);
  border-bottom:1px solid var(--rule-2);}
ul.evidence li:before{content:"";position:absolute;left:0;top:.95rem;width:6px;height:6px;background:var(--steel);}
ul.evidence li.ev-illus{color:var(--oxide-deep);}
ul.evidence li.ev-illus:before{background:none;border:1px solid var(--oxide);border-radius:50%;}

ol.sources{margin:0;padding-left:1.3rem;}
ol.sources li{margin-bottom:.8rem;font-size:.96rem;color:var(--ink-soft);}
.resolve{font-family:var(--sans);font-size:.74rem;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap;border:0;}

.xrefs{display:flex;flex-direction:column;gap:1px;border:1px solid var(--rule);background:var(--rule);}
.xrefs a{display:block;background:var(--paper);padding:.6rem .9rem;text-decoration:none;color:var(--ink-soft);border:0;font-size:.95rem;}
.xrefs a:hover{background:#fff;color:var(--oxide);}
.xrefs .mono{color:var(--oxide);margin-right:.6rem;}

/* Dublin Core card */
.dc-card{position:sticky;top:1.5rem;background:var(--paper-2);border:1px solid var(--rule);
  padding:1.2rem 1.3rem 1.4rem;border-radius:0;}
.dc-head{font-family:var(--sans);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--ink);}
.dc-note{font-family:var(--serif);font-style:italic;font-size:.78rem;color:var(--muted);margin:.15rem 0 1rem;}
dl.dc dd.dc-clamp{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
dl.dc{margin:0;display:grid;grid-template-columns:1fr;gap:0;}
dl.dc dt{font-family:var(--sans);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-top:.85rem;}
dl.dc dd{margin:.15rem 0 0;font-size:.9rem;line-height:1.45;color:var(--ink);}
dl.dc dd.mono{color:var(--oxide);}
dl.dc dd:lang(zh-Hans){font-family:var(--cjk);}
.approx{color:var(--muted);font-style:italic;}
.pending{margin-top:1.1rem;padding-top:1rem;border-top:1px solid var(--rule);font-size:.84rem;line-height:1.5;color:var(--ink-soft);font-family:var(--sans);}
.pending-tag{display:inline-block;font-size:.64rem;text-transform:uppercase;letter-spacing:.08em;
  background:var(--oxide);color:var(--paper);padding:.14rem .45rem;border-radius:0;margin-bottom:.4rem;}

/* cite-this-record panel */
.cite-block{margin-top:var(--s7);background:var(--paper-2);border:1px solid var(--rule);
  padding:1.1rem 1.3rem 1.2rem;max-width:var(--measure);}
.cite-head{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:.5rem;}
.cite-label{font-family:var(--sans);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--steel);}
.cite-copy{font-family:var(--sans);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;
  background:none;border:1px solid var(--rule);color:var(--ink-soft);padding:.2rem .55rem;cursor:pointer;border-radius:0;}
.cite-copy:hover{border-color:var(--oxide);color:var(--oxide);}
.cite-text{font-size:.9rem;color:var(--ink-soft);line-height:1.55;margin:0;}

/* ---- bilingual interview transcript: a parallel-text edition ---- */
.oh-intro-note{font-size:.9rem;color:var(--muted);margin:.2rem 0 .6rem;line-height:1.55;max-width:var(--measure);}
.oh-key{font-family:var(--sans);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--muted);margin:0 0 .4rem;padding-bottom:.5rem;border-bottom:1px solid var(--rule);}
.oh-interview{counter-reset:qa;margin:.2rem 0 var(--s6);max-width:none;}
.qa{display:grid;grid-template-columns:2.75rem minmax(0,1fr) minmax(0,1fr);
  column-gap:2.25rem;row-gap:.45rem;padding:1.1rem 0;border-bottom:1px solid var(--rule-2);
  counter-increment:qa;}
.qa-num{grid-column:1;grid-row:1 / span 2;font-family:var(--mono);font-size:.6875rem;
  color:var(--muted);letter-spacing:.02em;padding-top:.15rem;}
.qa-num::before{content:"Q\00B7" counter(qa,decimal-leading-zero);}
.qa-zh{grid-column:2;margin:0;}
.qa-en{grid-column:3;margin:0;padding-left:1.25rem;border-left:1px solid var(--rule);}
.qa-q{grid-row:1;font-family:var(--sans);font-size:.8125rem;line-height:1.5;color:var(--muted);}
.qa-q.qa-zh{font-family:var(--cjk-sans);font-weight:600;color:var(--ink-soft);}
.qa-a{grid-row:2;}
.qa-a.qa-zh{font-family:var(--cjk);font-size:1.0625rem;line-height:1.9;color:var(--ink);white-space:pre-wrap;}
.qa-a.qa-en{font-family:var(--serif);font-size:1rem;line-height:1.62;color:var(--ink-soft);}
.spk{font-family:var(--sans);font-size:.625rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.08em;color:var(--steel);margin-right:.5em;vertical-align:.05em;}

/* highlight quotes (parallel) */
.quotes{margin:.4rem 0 1.2rem;}
.oh-quote{border-left:3px solid var(--oxide);margin:.9rem 0;padding:.1rem 0 .1rem .95rem;}
.oh-quote .oq-zh{display:block;font-family:var(--cjk);font-size:1.125rem;line-height:1.9;color:var(--ink);}
.oh-quote .oq-en{display:block;font-family:var(--serif);font-size:.9rem;line-height:1.55;color:var(--muted);margin-top:.3rem;}

/* media: object floats whole on a plate, never cropped */
.media-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:1rem;margin:0 0 var(--s6);}
.media-fig{margin:0;}
.media-fig img{width:100%;max-height:32rem;aspect-ratio:4/3;object-fit:contain;
  background:var(--paper-2);border:1px solid var(--rule);padding:.4rem;display:block;}
.media-fig figcaption{font-size:.8rem;color:var(--muted);margin-top:.4rem;line-height:1.4;}
.media-fig .cap-sub{display:block;font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-top:.15rem;}
.redacted-tag{display:inline-block;background:var(--oxide-tint);color:var(--oxide);border:1px solid var(--oxide-line);
  border-radius:0;padding:0 .35em;font-size:.72rem;letter-spacing:.02em;}

/* ---------------------------------------------------------- prose pages */
.prose{padding:var(--s7) var(--s6) var(--s8);}
.prose h1{font-family:var(--display);font-weight:600;font-size:2rem;line-height:1.15;
  letter-spacing:-.01em;margin:0 0 1.3rem;max-width:22ch;}
.prose h2{font-family:var(--display);font-weight:600;font-size:1.4375rem;line-height:1.3;
  margin:var(--s7) 0 .8rem;max-width:var(--measure);}
.prose h3{font-family:var(--sans);font-size:.8125rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.1em;color:var(--steel);margin:1.4rem 0 .5rem;}
.prose p,.prose li{max-width:var(--measure);}
.prose p{margin:0 0 1.1rem;}
.prose .lede{font-size:1.18rem;color:var(--ink-soft);max-width:48rem;}
.prose dl.rubric dt,.prose dl.consent dt{font-weight:700;}
dl.rubric{display:grid;grid-template-columns:6rem 1fr;gap:.6rem 1.2rem;max-width:var(--measure);}
dl.rubric dt{font-family:var(--sans);color:var(--steel);font-size:.9rem;}
dl.rubric dd{margin:0;}
ul.consent,ol.biblio{max-width:var(--measure);}
ol.biblio{padding-left:1.4rem;}
ol.biblio li{margin-bottom:.85rem;font-size:.96rem;color:var(--ink-soft);}
.biblio-count{font-family:var(--sans);font-size:.84rem;color:var(--muted);}
.known-gaps{background:var(--paper-2);border-left:3px solid var(--steel);padding:.9rem 1.2rem;
  border-radius:0;font-size:.96rem;}
.split{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;max-width:var(--measure);margin:1rem 0;}
.split-col{border:1px solid var(--rule);padding:1.1rem 1.2rem;border-radius:0;background:var(--paper-2);}
.split-col h3{margin-top:0;}
.split-can{border-top:3px solid var(--steel);}
.split-must{border-top:3px solid var(--oxide);}
.split-col ul{margin:0;padding-left:1.1rem;}
.split-col li{font-size:.92rem;line-height:1.5;margin-bottom:.55rem;}
.split-note{font-size:.95rem;}
.triad{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;max-width:var(--measure);}
.triad h3{margin-top:0;}
.triad p{font-size:.92rem;line-height:1.5;}
ol.how-list{max-width:var(--measure);padding-left:1.3rem;}
ol.how-list li{margin-bottom:.9rem;line-height:1.55;}
pre.submit-tpl{font-family:var(--mono);font-size:.82rem;line-height:1.6;color:var(--ink-soft);
  background:var(--paper-2);border:1px solid var(--rule);border-left:3px solid var(--steel);
  border-radius:0;padding:1.2rem 1.3rem;max-width:var(--measure);overflow-x:auto;white-space:pre;margin:0 0 1.2rem;}
.cite-eg{font-family:var(--serif);background:var(--paper-2);border-left:3px solid var(--oxide);
  border-radius:0;padding:.8rem 1.1rem;max-width:var(--measure);font-size:.96rem;line-height:1.55;}
table.id-table{border-collapse:collapse;max-width:var(--measure);width:100%;margin:0 0 1.2rem;font-size:.92rem;}
table.id-table th,table.id-table td{text-align:left;vertical-align:top;padding:.55rem .8rem;border-bottom:1px solid var(--rule);}
table.id-table thead th{font-family:var(--sans);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;
  color:var(--steel);border-bottom:1.5px solid var(--ink-soft);}
table.id-table td.mono{color:var(--oxide);}

/* 404 */
.notfound{padding:var(--s9) var(--s6);text-align:left;max-width:var(--measure);}
.notfound h1{font-family:var(--display);font-weight:600;font-size:2rem;margin:0 0 1rem;}
.notfound .nf-note{font-family:var(--mono);font-size:.85rem;color:var(--muted);line-height:1.6;margin:0 0 1.5rem;}

/* ---------------------------------------------------------- footer */
.site-foot{background:var(--steel);color:#D9D2C6;margin-top:var(--s8);border-top:4px solid var(--oxide);}
.site-foot .wrap{padding:var(--s7) var(--s6) var(--s6);}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1.3fr;gap:2.4rem;margin-bottom:var(--s6);}
.foot-mark{margin-bottom:1.1rem;display:block;}
.foot-mission{font-size:.95rem;line-height:1.55;color:#C9C2B5;max-width:30rem;}
.site-foot h3{font-family:var(--sans);font-size:.74rem;text-transform:uppercase;letter-spacing:.12em;color:#fff;margin:0 0 .7rem;}
.site-foot ul{list-style:none;margin:0;padding:0;}
.site-foot li{margin-bottom:.4rem;font-size:.92rem;}
.site-foot a{color:#F3EEE4;text-underline-offset:2px;}
.site-foot a:hover{color:#fff;}
.site-foot p{font-size:.9rem;line-height:1.55;color:#C9C2B5;}
.fab-line{border-top:1px solid #45525A;padding-top:1.3rem;margin-top:.6rem;max-width:64rem;}
.fab-head{font-family:var(--sans);font-size:.74rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.12em;color:#F3EEE4;margin:0 0 .5rem;}
.fab-line p{margin:0;font-size:.82rem;line-height:1.55;color:#CFC8BB;}
.fab-line strong{color:#F3EEE4;}
.copyline{font-family:var(--sans);font-size:.78rem;color:#9AA3A0;margin-top:1.4rem;border-top:1px solid #45525A;padding-top:1rem;}

/* ---------------------------------------------------------- responsive */
@media (max-width:900px){
  .qa{grid-template-columns:1fr;column-gap:0;row-gap:.35rem;}
  .qa-num{grid-column:1;grid-row:auto;}
  .qa-zh,.qa-en{grid-column:1;}
  .qa-en{padding-left:0;border-left:0;padding-top:.35rem;border-top:1px solid var(--rule-2);margin-top:.15rem;}
}
@media (max-width:860px){
  .item-cols{grid-template-columns:1fr;gap:var(--s6);}
  .dc-card{position:static;}
  .triad,.split{grid-template-columns:1fr;}
  .impact-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;gap:1.6rem;}
}
@media (max-width:600px){
  body{font-size:17px;}
  .wrap{padding:0 1.2rem;}
  .intro .wrap{padding:var(--s7) 1.2rem var(--s6);}
  .intro-title{font-size:2rem;}
  .item-head h1,.prose h1{font-size:1.7rem;}
  .records{grid-template-columns:1fr;}
  .topnav{gap:.9rem;font-size:.72rem;}
}
@media (prefers-reduced-motion:no-preference){
  .intro-title,.prose h1,.item-head h1{animation:fade .5s ease both;}
  @keyframes fade{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}
}

/* ---------------------------------------------------------- print */
@media print{
  :root{--paper:#fff;--paper-2:#fff;}
  body{background:#fff;color:#000;font-size:11pt;line-height:1.5;}
  @page{margin:2cm;}
  .masthead .topnav,.skip,.intro-links,.controls,.facets,.map-sec,.site-foot .foot-grid,
  .cite-copy,.nav-data,#q,.noresult{display:none !important;}
  a{color:#000;text-decoration:none;}
  .masthead{border-bottom:1.5pt solid #000;box-shadow:none;}
  .item-head{border-bottom:1.5pt solid #000;box-shadow:none;}
  .item-cols{display:block;}
  .item-main{max-width:none;}
  .dc-card{position:static;border:1px solid #999;margin-top:1.5rem;break-inside:avoid;}
  .qa{grid-template-columns:1fr;break-inside:avoid;}
  .qa-en{padding-left:0;border-left:0;border-top:1px solid #ccc;padding-top:.3rem;}
  .rec{break-inside:avoid;}
  ol.sources li a.resolve::after{content:" (" attr(href) ")";font-size:.8em;color:#000;}
  .site-foot{background:#fff;color:#000;border-top:1.5pt solid #000;}
  .site-foot a{color:#000;}
  .fab-line{color:#000;}
  .copyline{color:#000;}
}