/*
Theme Name: Null Institute
Theme URI: https://nullinstitute.org
Author: The Null Institute
Description: Research publishing theme for The Null Institute. Built for research reports, preprints, evidence records, methods, and institutional pages.
Version: 0.2.1
Requires at least: 6.6
Requires PHP: 8.1
Text Domain: null-institute
*/

:root {
  --ni-bg: #f7f6f2;
  --ni-paper: #fbfaf7;
  --ni-soft: #efede7;
  --ni-ink: #111820;
  --ni-text: #2d3338;
  --ni-muted: #6e7478;
  --ni-line: #dad8d1;
  --ni-dark: #10171d;
  --ni-green: #dfeeda;
  --ni-green-ink: #2f5a39;
  --ni-blue: #e1edf7;
  --ni-blue-ink: #315a78;
  --ni-amber: #f6ead3;
  --ni-amber-ink: #755322;
  --ni-max: 1220px;
  --ni-radius: 5px;
  --ni-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --ni-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --ni-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ni-text);
  background: var(--ni-bg);
  font-family: var(--ni-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #000; }
img { max-width: 100%; height: auto; }
button, input { font: inherit; }

.ni-wrap { width: min(calc(100% - 64px), var(--ni-max)); margin-inline: auto; }
.ni-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  line-height: 1.2;
  font-weight: 650;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ni-muted);
}
.ni-serif { font-family: var(--ni-serif); }
.ni-muted { color: var(--ni-muted); }
.ni-mono { font-family: var(--ni-mono); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--ni-paper) 94%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ni-line);
}
.site-header__inner {
  min-height: 68px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
}
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ni-ink);
  font-weight: 700;
  font-size: 14px;
}
.site-brand__mark {
  width: 24px;
  height: 27px;
  border: 1px solid var(--ni-ink);
  border-radius: 1px;
  position: relative;
  background: linear-gradient(90deg, var(--ni-ink) 0 46%, #dde2e3 46% 100%);
  flex: 0 0 auto;
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  inset: 4px 4px auto auto;
  width: 5px;
  height: 14px;
  background: var(--ni-paper);
  opacity: .72;
}
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: center; gap: 34px; }
.site-nav a { text-decoration: none; font-size: 14px; color: var(--ni-ink); }
.site-actions { display: flex; align-items: center; gap: 16px; }
.site-search {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  font-size: 13px;
}
.site-search svg { width: 19px; height: 19px; }
.site-contact {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 17px;
  border-radius: 4px;
  background: var(--ni-dark);
  color: white;
  text-decoration: none;
  font-size: 13px;
}
.site-contact:hover { color: white; background: #25303a; }
.site-menu-mobile { display: none; position: relative; }
.site-menu-mobile summary { list-style: none; cursor: pointer; font-size: 14px; }
.site-menu-mobile summary::-webkit-details-marker { display:none; }
.site-menu-mobile__panel {
  position: absolute;
  top: 44px;
  right: 0;
  min-width: 230px;
  padding: 16px;
  background: var(--ni-paper);
  border: 1px solid var(--ni-line);
  box-shadow: 0 18px 45px rgba(10,20,25,.12);
}
.site-menu-mobile__panel a { display: block; padding: 9px 4px; text-decoration: none; }

/* Hero */
.ni-hero { border-bottom: 1px solid var(--ni-line); background: var(--ni-paper); }
.ni-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, .96fr) minmax(420px, 1.04fr);
  gap: 68px;
  align-items: center;
  padding-block: 66px 70px;
}
.ni-hero h1 {
  margin: 0 0 18px;
  color: var(--ni-ink);
  font: 500 clamp(58px, 7vw, 94px)/.95 var(--ni-serif);
  letter-spacing: -.042em;
}
.ni-hero__lede {
  max-width: 650px;
  margin: 0 0 24px;
  font: 400 clamp(25px, 3vw, 38px)/1.18 var(--ni-serif);
  color: #686c6f;
}
.ni-hero__body { max-width: 610px; margin: 0 0 30px; font-size: 17px; color: #343a3f; }
.ni-button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.ni-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ni-dark);
  border-radius: 4px;
  background: var(--ni-dark);
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}
.ni-button:hover { color: white; background: #26323a; }
.ni-button--ghost { color: var(--ni-ink); background: transparent; }
.ni-button--ghost:hover { color: var(--ni-ink); background: var(--ni-soft); }

/* Evidence diagram */
.ni-evidence-map {
  position: relative;
  min-height: 400px;
  border-radius: 8px;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 25%, rgba(120,130,135,.13) 0 1px, transparent 1.6px) 0 0 / 28px 28px,
    linear-gradient(135deg, rgba(245,244,240,.5), rgba(232,232,227,.75));
  border: 1px solid #e3e1db;
}
.ni-evidence-map::before {
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(120deg, transparent 0 39%, rgba(17,24,32,.06) 39.2% 39.4%, transparent 39.6% 58%, rgba(17,24,32,.05) 58.2% 58.4%, transparent 58.6%);
  pointer-events:none;
}
.ni-node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 7px 10px;
  border: 1px solid #cfd0cb;
  border-radius: 5px;
  background: rgba(251,250,247,.96);
  color: var(--ni-ink);
  font-size: 12px;
  line-height: 1.25;
  box-shadow: 0 3px 12px rgba(20,25,28,.04);
}
.ni-node::before {
  content:"";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background:#7f9188;
  flex: 0 0 auto;
}
.ni-node--source1 { left: 4%; top: 11%; }
.ni-node--source2 { left: 4%; top: 27%; }
.ni-node--source3 { left: 4%; top: 43%; }
.ni-node--source4 { left: 4%; top: 59%; }
.ni-node--source5 { left: 4%; top: 75%; }
.ni-node--source2::before { background:#a18c74; }
.ni-node--source3::before { background:#647c8b; }
.ni-node--source4::before { background:#769775; }
.ni-node--source5::before { background:#2f4653; }
.ni-node--check { left: 39%; top: 37%; width: 148px; min-height: 70px; justify-content:center; text-align:center; font-weight:650; }
.ni-node--check::before { display:none; }
.ni-node--finding { right: 4%; top: 37%; min-width: 120px; justify-content:center; font-weight:650; }
.ni-node--finding::before { background:#4a7f69; }
.ni-node--record { right: 4%; top: 61%; min-width: 150px; }
.ni-node--record::before { background:#111820; border-radius:1px; }
.ni-node--alt { right: 4%; top: 10%; min-width: 136px; border-color:#decfc5; }
.ni-node--alt::before { background:#a74b3c; }
.ni-evidence-links {
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
  overflow:visible;
}
.ni-evidence-links .ni-link {
  fill:none;
  stroke:#647078;
  stroke-width:1.35;
  vector-effect:non-scaling-stroke;
  opacity:.82;
}
.ni-evidence-links .ni-link--strong { stroke:#3f4a51; opacity:.95; }
.ni-evidence-links .ni-link--soft { stroke:#8c9295; stroke-dasharray:5 5; opacity:.52; }
.ni-evidence-links marker path { fill:#647078; }
.ni-node, .ni-map-caption { z-index:1; }
.ni-map-caption { position:absolute; font: 11px/1.3 var(--ni-sans); color:#8a8e91; }
.ni-map-caption--alt { right: 20%; top: 17%; }
.ni-map-caption--weak { left: 39%; bottom: 8%; }

/* Pillars */
.ni-pillars { background: var(--ni-paper); border-bottom: 1px solid var(--ni-line); }
.ni-pillars__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.ni-pillar { padding: 34px 36px 38px 0; }
.ni-pillar + .ni-pillar { border-left: 1px solid var(--ni-line); padding-left: 36px; }
.ni-pillar__icon { width: 38px; height: 38px; margin-bottom: 18px; color: var(--ni-ink); }
.ni-pillar__icon svg { width:100%; height:100%; stroke:currentColor; fill:none; stroke-width:1.7; }
.ni-pillar h2 { margin: 0 0 9px; color: var(--ni-ink); font: 500 29px/1.08 var(--ni-serif); }
.ni-pillar p { margin: 0; max-width: 34ch; color: #4d5357; font-size: 15px; }

/* Approach */
.ni-approach { padding: 58px 0 64px; background: #f3f1ec; border-bottom: 1px solid var(--ni-line); }
.ni-approach__grid { display:grid; grid-template-columns: .75fr 1.65fr; gap: 54px; align-items:center; }
.ni-approach h2 { margin: 0 0 13px; color:var(--ni-ink); font:500 clamp(38px,4vw,50px)/1.03 var(--ni-serif); }
.ni-approach__intro p { margin:0 0 24px; max-width:50ch; color:#52585c; }
.ni-flow { display:grid; grid-template-columns: repeat(6, 1fr); align-items:start; gap: 10px; }
.ni-flow__step { position:relative; text-align:center; padding-top:4px; }
.ni-flow__step:not(:last-child)::after { content:"→"; position:absolute; top:24px; right:-11px; color:#868b8e; }
.ni-flow__icon { width:50px; height:50px; margin:0 auto 11px; display:grid; place-items:center; border-radius:50%; background:#e6e5e1; color:var(--ni-ink); font-size:22px; }
.ni-flow__step strong { display:block; margin-bottom:5px; color:var(--ni-ink); font-size:12px; }
.ni-flow__step span { display:block; color:#73787b; font-size:10px; line-height:1.3; }

/* Current research */
.ni-current { padding: 58px 0 68px; background: var(--ni-paper); border-bottom: 1px solid var(--ni-line); }
.ni-section-head { display:flex; justify-content:space-between; gap:24px; align-items:end; margin-bottom:26px; }
.ni-section-head h2 { margin:0; color:var(--ni-ink); font:500 43px/1.05 var(--ni-serif); }
.ni-section-head a { text-decoration:none; font-size:13px; }
.ni-card-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:18px; }
.ni-card { overflow:hidden; border:1px solid var(--ni-line); border-radius:6px; background:#fbfaf7; color:var(--ni-ink); text-decoration:none; }
.ni-card:hover { color:var(--ni-ink); box-shadow:0 8px 24px rgba(15,22,26,.07); transform:translateY(-1px); }
.ni-card__visual { height:145px; position:relative; overflow:hidden; background:#dadddc; }
.ni-card__visual--leaf { background: repeating-linear-gradient(112deg,#495052 0 2px,#aeb3b1 2px 4px,#dadbd7 4px 15px); }
.ni-card__visual--haze { background: linear-gradient(165deg,#e3e5e3 0 35%,#c7cece 36% 44%,#8f9b9b 45% 53%,#4e5a5c 54% 59%,#d9dddb 60%); }
.ni-card__visual--curve { background: repeating-radial-gradient(ellipse at 115% 10%,#eef0ee 0 13px,#b3b7b7 14px 17px,#51595d 18px 22px,#eef0ee 23px 35px); }
.ni-card__body { padding: 16px 17px 18px; }
.ni-status { display:inline-flex; padding:5px 9px; border-radius:4px; margin-bottom:14px; font-size:9px; font-weight:700; letter-spacing:.03em; text-transform:uppercase; }
.ni-status--progress { background:var(--ni-blue); color:var(--ni-blue-ink); }
.ni-status--done { background:var(--ni-green); color:var(--ni-green-ink); }
.ni-status--prep { background:var(--ni-amber); color:var(--ni-amber-ink); }
.ni-card__title-row { display:grid; grid-template-columns:1fr auto; gap:12px; align-items:start; }
.ni-card h3 { margin:0 0 8px; font:500 22px/1.12 var(--ni-serif); }
.ni-card__arrow { font-size:20px; line-height:1; }
.ni-card p { margin:0 0 18px; color:#596064; font-size:13px; line-height:1.45; }
.ni-card__footer { display:flex; justify-content:space-between; gap:10px; align-items:center; color:#7b8083; font-size:10px; }
.ni-tag { padding:4px 7px; border-radius:4px; background:#efefec; color:#555b5e; }

/* Infrastructure */
.ni-infra { padding: 46px 0 58px; background:#f5f4f0; border-bottom:1px solid var(--ni-line); }
.ni-infra__head { display:flex; justify-content:space-between; align-items:end; gap:24px; margin-bottom:22px; }
.ni-infra h2 { margin:0; color:var(--ni-ink); font:500 38px/1.06 var(--ni-serif); }
.ni-infra__grid { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
.ni-infra-card { min-height:150px; padding:18px; border:1px solid var(--ni-line); border-radius:5px; background:#faf9f6; }
.ni-infra-card__top { display:flex; gap:12px; align-items:flex-start; }
.ni-infra-card__icon { font-size:24px; line-height:1; color:var(--ni-ink); }
.ni-infra-card h3 { margin:0 0 7px; color:var(--ni-ink); font:500 18px/1.15 var(--ni-serif); }
.ni-infra-card p { margin:0 0 14px; color:#6c7174; font-size:12px; line-height:1.4; }
.ni-mini-status { display:inline-flex; padding:4px 7px; border-radius:4px; background:#e7e9e8; color:#687074; font-size:9px; }
.ni-mini-status--active { background:var(--ni-blue); color:var(--ni-blue-ink); }

/* About strip */
.ni-about { padding: 46px 0; background:var(--ni-paper); }
.ni-about__grid { display:grid; grid-template-columns: .75fr 1.25fr; gap:60px; align-items:start; }
.ni-about h2 { margin:0; color:var(--ni-ink); font:500 34px/1.08 var(--ni-serif); }
.ni-about p { margin:0; max-width:72ch; color:#555b5e; }

/* Generic content */
.content-shell { padding:72px 0 96px; background:var(--ni-paper); }
.content-shell__grid { display:grid; grid-template-columns:minmax(0,1fr) 270px; gap:72px; align-items:start; }
.entry-title { margin:0 0 16px; color:var(--ni-ink); font:500 clamp(44px,5.5vw,72px)/1.02 var(--ni-serif); letter-spacing:-.025em; }
.entry-meta { margin:0 0 32px; color:var(--ni-muted); font:11px/1.5 var(--ni-mono); text-transform:uppercase; letter-spacing:.04em; }
.entry-content { max-width:800px; }
.entry-content h2,.entry-content h3 { color:var(--ni-ink); font-family:var(--ni-serif); font-weight:500; line-height:1.15; }
.entry-content h2 { margin-top:2.2em; font-size:36px; }
.entry-content h3 { margin-top:1.8em; font-size:27px; }
.entry-content p,.entry-content li { max-width:72ch; }
.entry-content blockquote { margin:36px 0; padding:4px 0 4px 24px; border-left:2px solid var(--ni-ink); font:500 25px/1.4 var(--ni-serif); }
.ni-sidebar { border-top:1px solid var(--ni-line); padding-top:18px; font-size:13px; }
.ni-sidebar__item { padding:14px 0; border-bottom:1px solid var(--ni-line); }

.archive-hero { padding:68px 0 32px; background:var(--ni-paper); border-bottom:1px solid var(--ni-line); }
.archive-hero h1 { margin:0 0 12px; color:var(--ni-ink); font:500 64px/1 var(--ni-serif); }
.archive-list { padding:20px 0 90px; background:var(--ni-paper); }
.archive-item { display:grid; grid-template-columns:150px 1fr auto; gap:28px; padding:24px 0; border-bottom:1px solid var(--ni-line); align-items:start; text-decoration:none; }
.archive-item__type { font:650 10px/1.25 var(--ni-sans); letter-spacing:.08em; text-transform:uppercase; color:var(--ni-muted); }
.archive-item h2 { margin:0 0 8px; color:var(--ni-ink); font:500 24px/1.15 var(--ni-serif); }
.archive-item p { margin:0; color:var(--ni-muted); font-size:13px; }
.archive-item__date { font:11px/1.4 var(--ni-mono); color:var(--ni-muted); white-space:nowrap; }

/* Footer */
.site-footer { padding:36px 0 22px; background:var(--ni-paper); border-top:1px solid var(--ni-line); }
.site-footer__top { display:grid; grid-template-columns:1.2fr .8fr auto; gap:38px; align-items:start; }
.site-footer__tagline { margin:7px 0 0; color:var(--ni-muted); font-size:12px; }
.site-footer__nav { display:flex; flex-wrap:wrap; gap:16px 22px; }
.site-footer__nav a { text-decoration:none; font-size:12px; }
.site-footer__contact { text-align:right; font-size:12px; }
.site-footer__bottom { display:flex; justify-content:space-between; gap:20px; margin-top:26px; padding-top:18px; border-top:1px solid #e6e3dd; color:#8a8f91; font-size:10px; }

@media (max-width: 1000px) {
  .ni-hero__grid { grid-template-columns:1fr; gap:34px; }
  .ni-evidence-map { min-height:340px; }
  .ni-approach__grid { grid-template-columns:1fr; }
  .ni-flow { grid-template-columns:repeat(3,1fr); row-gap:26px; }
  .ni-flow__step:nth-child(3)::after { display:none; }
  .ni-infra__grid { grid-template-columns:repeat(2,1fr); }
  .content-shell__grid { grid-template-columns:1fr; gap:40px; }
}

@media (max-width: 820px) {
  .site-header__inner { grid-template-columns:1fr auto; }
  .site-nav,.site-actions { display:none; }
  .site-menu-mobile { display:block; }
  .ni-pillars__grid,.ni-card-grid { grid-template-columns:1fr; }
  .ni-pillar + .ni-pillar { border-left:0; border-top:1px solid var(--ni-line); padding-left:0; }
  .ni-about__grid { grid-template-columns:1fr; gap:18px; }
  .site-footer__top { grid-template-columns:1fr; gap:22px; }
  .site-footer__contact { text-align:left; }
  .archive-item { grid-template-columns:1fr auto; }
  .archive-item__type { grid-column:1 / -1; }
}

@media (max-width: 600px) {
  body { font-size:15px; }
  .ni-wrap { width:min(calc(100% - 28px), var(--ni-max)); }
  .site-header__inner { min-height:60px; }
  .site-brand { font-size:12px; }
  .site-brand__mark { width:20px; height:23px; }
  .ni-hero__grid { padding-block:42px 46px; }
  .ni-hero h1 { font-size:55px; }
  .ni-hero__lede { font-size:26px; }
  .ni-evidence-map { min-height:300px; transform:scale(.97); transform-origin:center; }
  .ni-node { font-size:9px; padding:5px 7px; min-height:32px; }
  .ni-node--check { width:112px; min-height:58px; }
  .ni-node--finding { min-width:92px; }
  .ni-node--record { min-width:112px; }
  .ni-node--alt { min-width:100px; }
  .ni-map-caption { display:none; }
  .ni-pillar { padding:28px 0; }
  .ni-approach,.ni-current,.ni-infra { padding-block:42px; }
  .ni-flow { grid-template-columns:repeat(2,1fr); gap:26px 8px; }
  .ni-flow__step:nth-child(2)::after,.ni-flow__step:nth-child(4)::after { display:none; }
  .ni-flow__step:nth-child(3)::after { display:block; }
  .ni-section-head,.ni-infra__head { align-items:flex-start; flex-direction:column; }
  .ni-section-head h2 { font-size:37px; }
  .ni-infra h2 { font-size:32px; }
  .ni-infra__grid { grid-template-columns:1fr; }
  .archive-hero h1 { font-size:48px; }
  .archive-item { grid-template-columns:1fr; gap:7px; }
  .archive-item__date { justify-self:start; }
  .site-footer__bottom { flex-direction:column; gap:6px; }
}