/* Let's Begin Here: Food Systems — design system
   Matches the "Let's Begin Here" index style (Rural Revitalization),
   re-keyed from blue to deep green. */

:root {
  /* palette */
  --hero: #175833;            /* deep field green (was royal blue) */
  --hero-deep: #114427;
  --hero-card: #2c6b47;       /* stat card fill on hero */
  --hero-card-line: #4a8265;
  --accent-italic: #f3ecc8;   /* pale straw italic (was pale pink) */
  --cta: #c9491d;             /* harvest tomato (was crimson) */
  --cta-hover: #b03e17;
  --ink: #1d1d1f;
  --ink-soft: #444a47;
  --ink-faint: #6b736f;
  --paper: #ffffff;
  --paper-warm: #f7f6f1;
  --line: #e2e5e1;
  --line-dash: #c9cfc9;
  --link: #175833;
  --link-bright: #1d6f42;
  --chip-bg: #eef3ee;
  --gold: #b98a1c;
  --gradeA: #175833; --gradeB: #1d6f42; --gradeC: #b98a1c; --gradeD: #8a5a10;
  --mark: #f6e9a8;           /* highlight colour */
  --shadow: 0 1px 2px rgba(20, 40, 28, .06), 0 8px 28px rgba(20, 40, 28, .07);
  --radius: 6px;
  --sans: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --header-h: 80px;
}

[data-theme="dark"] {
  --ink: #e8ebe8;
  --ink-soft: #b7c0ba;
  --ink-faint: #8a948e;
  --paper: #101613;
  --paper-warm: #17201b;
  --line: #263129;
  --line-dash: #34423a;
  --link: #7fc9a0;
  --link-bright: #8fd4ab;
  --chip-bg: #1b2620;
  --hero: #124026;
  --hero-deep: #0d3018;
  --hero-card: #1c5434;
  --hero-card-line: #35704f;
  --mark: #4d431a;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--link-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  height: var(--header-h);
  display: flex; align-items: center;
}
.header-inner {
  width: 100%; max-width: 1560px; margin: 0 auto;
  padding: 0 40px;
  display: flex; align-items: center; gap: 28px;
}
.wordmark {
  border: 2px solid var(--hero);
  padding: 7px 12px 8px;
  line-height: 1.15;
  color: var(--ink);
  flex-shrink: 0;
}
.wordmark:hover { text-decoration: none; }
.wordmark b { display: block; font-size: 15.5px; font-weight: 700; letter-spacing: -.01em; }
.wordmark span {
  display: block; font-size: 11.5px; font-weight: 700;
  letter-spacing: .12em; color: var(--hero); text-transform: uppercase;
}
[data-theme="dark"] .wordmark { border-color: var(--link); }
[data-theme="dark"] .wordmark span { color: var(--link); }

.main-nav { display: flex; gap: 26px; margin-left: 26px; flex-wrap: wrap; }
.main-nav a { color: var(--ink); font-size: 15.5px; }
.main-nav a:hover { color: var(--link-bright); text-decoration: none; }
.main-nav a.active { font-weight: 600; color: var(--link-bright); }

.header-tools { margin-left: auto; display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.pill {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--line-dash);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-size: 14.5px; font-family: var(--sans);
  padding: 9px 16px; cursor: pointer;
}
.pill:hover { border-color: var(--ink-faint); text-decoration: none; }
.pill .count { color: var(--link-bright); font-weight: 700; }
.pill.icon { width: 42px; height: 42px; justify-content: center; padding: 0; font-size: 16px; }

/* ---------- hero ---------- */
.hero { background: var(--hero); color: #fff; padding: 96px 0 110px; }
.hero-inner, .wrap { max-width: 1560px; margin: 0 auto; padding: 0 40px; }
.eyebrow {
  font-size: 13px; font-weight: 700; letter-spacing: .22em;
  text-transform: uppercase; color: rgba(255,255,255,.85);
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(44px, 6vw, 88px);
  font-weight: 700; letter-spacing: -.015em; line-height: 1.04;
  max-width: 900px; margin-bottom: 34px;
}
.hero h1 em {
  font-family: var(--serif); font-style: italic; font-weight: 500;
  color: var(--accent-italic); letter-spacing: 0;
}
.hero .lede {
  font-size: 22px; line-height: 1.5; max-width: 880px;
  color: rgba(255,255,255,.96); margin-bottom: 40px;
}
.hero .lede a { color: #fff; text-decoration: underline; }

/* search */
.searchbar { display: flex; max-width: 930px; background: #fff; border-radius: 3px; overflow: hidden; }
.searchbar .field { flex: 1; display: flex; align-items: center; gap: 12px; padding: 0 22px; }
.searchbar .field svg { flex-shrink: 0; opacity: .55; }
.searchbar input {
  border: 0; outline: 0; width: 100%; font-size: 18.5px; font-family: var(--sans);
  padding: 22px 0; color: #1d1d1f; background: transparent;
}
.searchbar input::placeholder { color: #8a918d; }
.searchbar button {
  border: 0; background: var(--cta); color: #fff;
  font-size: 17px; font-weight: 600; font-family: var(--sans);
  padding: 0 36px; margin: 7px; border-radius: 3px; cursor: pointer;
}
.searchbar button:hover { background: var(--cta-hover); }

.try { display: flex; align-items: center; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.try .try-label { font-size: 15px; color: rgba(255,255,255,.8); margin-right: 2px; }
.try a {
  border: 1px solid rgba(255,255,255,.55); color: #fff;
  font-size: 14.5px; padding: 7px 14px; border-radius: 3px;
  background: rgba(255,255,255,.06);
}
.try a:hover { background: rgba(255,255,255,.16); text-decoration: none; }

/* stat cards */
.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 26px; margin-top: 56px; }
.stat {
  background: var(--hero-card);
  border: 1px solid var(--hero-card-line);
  padding: 22px 24px 20px;
}
.stat .n { font-family: var(--serif); font-size: 42px; font-weight: 600; line-height: 1.1; }
.stat .l { font-size: 15px; color: rgba(255,255,255,.88); margin-top: 6px; }

.updated { display: flex; align-items: center; gap: 10px; margin-top: 40px; font-size: 15.5px; color: rgba(255,255,255,.92); }
.updated .dot { width: 9px; height: 9px; border-radius: 50%; background: #7fe0a8; }
.updated b { font-weight: 700; color: #fff; }

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section + .section { padding-top: 0; }
.kicker {
  font-size: 26px; font-weight: 800; letter-spacing: .04em;
  margin-bottom: 14px;
}
.section-intro { font-size: 18px; color: var(--ink-soft); max-width: 640px; margin-bottom: 10px; }

/* five ways in — paths */
.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 0 80px; margin-top: 26px; }
.path { border-top: 1.5px dashed var(--line-dash); padding: 30px 0 36px; }
.path .pnum {
  font-size: 13px; font-weight: 700; letter-spacing: .18em;
  color: var(--link-bright); text-transform: uppercase; margin-bottom: 12px;
}
.path h3 { font-size: 21px; font-weight: 800; letter-spacing: .01em; margin-bottom: 12px; text-transform: uppercase; }
.path p { color: var(--ink-soft); font-size: 17px; max-width: 620px; }
.path .go { display: inline-block; margin-top: 16px; font-weight: 600; color: var(--link-bright); }
.path .go:after { content: " \2192"; }

/* generic page hero (interior pages) */
.page-hero { background: var(--hero); color: #fff; padding: 64px 0 58px; }
.page-hero h1 { font-size: clamp(34px, 4vw, 56px); font-weight: 700; letter-spacing: -.01em; line-height: 1.08; max-width: 900px; }
.page-hero h1 em { font-family: var(--serif); font-style: italic; font-weight: 500; color: var(--accent-italic); }
.page-hero .lede { margin-top: 18px; font-size: 19px; max-width: 860px; color: rgba(255,255,255,.94); }
.page-hero .eyebrow { margin-bottom: 18px; }

/* ---------- cards & chips ---------- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); padding: 24px 26px;
}
.card h3 { font-size: 18px; line-height: 1.35; margin-bottom: 8px; }
.card h3 a { color: var(--ink); }
.card .meta { font-size: 14px; color: var(--ink-faint); margin-bottom: 10px; }
.card .abstract { font-size: 15.5px; color: var(--ink-soft); }

.chip {
  display: inline-block; font-size: 12.5px; font-weight: 600;
  border-radius: 3px; padding: 3px 9px; margin: 0 6px 6px 0;
  background: var(--chip-bg); color: var(--ink-soft);
  border: 1px solid transparent;
}
.chip.grade { color: #fff; }
.chip.gA { background: var(--gradeA); } .chip.gB { background: var(--gradeB); }
.chip.gC { background: var(--gradeC); } .chip.gD { background: var(--gradeD); }
[data-theme="dark"] .chip.gA, [data-theme="dark"] .chip.gB { color: #eafff2; }
.chip.type { background: transparent; border-color: var(--line-dash); }
.chip.tag { cursor: pointer; }
.chip.tag:hover { border-color: var(--ink-faint); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line-dash); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font-size: 14.5px; font-weight: 600; font-family: var(--sans);
  padding: 9px 16px; cursor: pointer;
}
.btn:hover { border-color: var(--ink-faint); text-decoration: none; }
.btn.primary { background: var(--cta); border-color: var(--cta); color: #fff; }
.btn.primary:hover { background: var(--cta-hover); }
.btn.green { background: var(--hero); border-color: var(--hero); color: #fff; }
.btn.small { padding: 5px 11px; font-size: 13px; font-weight: 600; }
.btn.saved-state { border-color: var(--link-bright); color: var(--link-bright); }

/* ---------- source browser ---------- */
.browser { display: grid; grid-template-columns: 280px 1fr; gap: 44px; align-items: start; }
.filters { position: sticky; top: calc(var(--header-h) + 24px); }
.filters .fgroup { border-top: 1.5px dashed var(--line-dash); padding: 18px 0 20px; }
.filters .fgroup:first-child { border-top: 0; padding-top: 0; }
.filters h4 { font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 12px; color: var(--ink-soft); }
.filters label { display: flex; gap: 9px; align-items: baseline; font-size: 15px; padding: 3.5px 0; cursor: pointer; color: var(--ink-soft); }
.filters label .fc { color: var(--ink-faint); font-size: 13px; margin-left: auto; }
.filters input[type="checkbox"] { accent-color: var(--hero); transform: translateY(1px); }
.result-head { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.result-head .rcount { font-size: 15.5px; color: var(--ink-soft); }
.result-head select {
  margin-left: auto; font-family: var(--sans); font-size: 14.5px;
  padding: 8px 10px; border: 1px solid var(--line-dash); border-radius: 4px;
  background: var(--paper); color: var(--ink);
}
.source-list { display: flex; flex-direction: column; gap: 18px; }
.source-card { display: flex; flex-direction: column; }
.source-card .row { display: flex; gap: 14px; align-items: flex-start; }
.source-card .row .grow { flex: 1; }
.source-card .actions { display: flex; gap: 8px; flex-shrink: 0; }
.mini-search {
  width: 100%; font-family: var(--sans); font-size: 16px;
  border: 1px solid var(--line-dash); border-radius: 4px;
  padding: 12px 14px; margin-bottom: 18px; background: var(--paper); color: var(--ink);
}

/* ---------- numbers page ---------- */
.numbers-table { width: 100%; border-collapse: collapse; font-size: 16px; }
.numbers-table th, .numbers-table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.numbers-table th { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }
.numbers-table td.val { font-family: var(--serif); font-size: 20px; font-weight: 600; white-space: nowrap; }
.numbers-table .src { font-size: 13.5px; color: var(--ink-faint); }
.table-scroll { overflow-x: auto; }
.bignum-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; margin: 34px 0; }
.bignum { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: var(--paper-warm); }
.bignum .n { font-family: var(--serif); font-size: 38px; font-weight: 600; line-height: 1.1; color: var(--link); }
[data-theme="dark"] .bignum .n { color: var(--link-bright); }
.bignum .l { font-size: 14.5px; color: var(--ink-soft); margin-top: 8px; }
.bignum .s { font-size: 12.5px; color: var(--ink-faint); margin-top: 8px; }

/* ---------- prose / synthesis ---------- */
.prose { max-width: 830px; }
.prose h2 { font-size: 28px; letter-spacing: -.01em; margin: 54px 0 16px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 20px; margin: 34px 0 12px; }
.prose p { margin: 0 0 18px; color: var(--ink); }
.prose p.soft { color: var(--ink-soft); }
.prose .lead { font-size: 21px; line-height: 1.55; color: var(--ink-soft); }
.prose blockquote {
  border-left: 3px solid var(--hero); padding: 6px 0 6px 22px;
  margin: 26px 0; font-family: var(--serif); font-size: 20px; font-style: italic; color: var(--ink-soft);
}
.prose .refs { font-size: 14px; color: var(--ink-faint); }
.prose hr { border: 0; border-top: 1.5px dashed var(--line-dash); margin: 44px 0; }
.evidence {
  font-size: 13.5px; color: var(--ink-faint); border-top: 1px solid var(--line);
  margin-top: 10px; padding-top: 8px;
}
.evidence a { color: var(--link-bright); }

/* ---------- library reader ---------- */
.reader { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 54px; align-items: start; }
.toc { position: sticky; top: calc(var(--header-h) + 24px); font-size: 14.5px; max-height: calc(100vh - 140px); overflow: auto; }
.toc a { display: block; padding: 5px 0; color: var(--ink-soft); }
.toc a.lvl2 { padding-left: 14px; font-size: 13.5px; color: var(--ink-faint); }
.toc a:hover { color: var(--link-bright); text-decoration: none; }
.entry { border-top: 1.5px dashed var(--line-dash); padding: 30px 0 34px; }
.entry h3 { font-size: 21px; line-height: 1.35; margin-bottom: 6px; }
.entry .meta { font-size: 14.5px; color: var(--ink-faint); margin-bottom: 14px; }
.entry .findings { margin: 14px 0 0; padding-left: 22px; }
.entry .findings li { margin-bottom: 8px; color: var(--ink); font-size: 16px; }
.entry .abstract, .entry .method { font-size: 16px; color: var(--ink-soft); margin-top: 12px; }
.entry .method b, .entry .abstract b { color: var(--ink); }
.entry .entry-actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
mark, .hl { background: var(--mark); color: inherit; padding: 0 1px; border-radius: 2px; }
.hl { cursor: pointer; }

/* highlight popover */
.hl-pop {
  position: absolute; z-index: 90; background: var(--ink); color: var(--paper);
  border-radius: 5px; padding: 6px 8px; display: flex; gap: 4px; box-shadow: var(--shadow);
}
.hl-pop button { background: transparent; border: 0; color: inherit; font-family: var(--sans); font-size: 13.5px; font-weight: 600; padding: 5px 9px; cursor: pointer; border-radius: 3px; }
.hl-pop button:hover { background: rgba(255,255,255,.16); }

/* ---------- directory ---------- */
.org-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.org-card .n { font-family: var(--serif); font-size: 30px; font-weight: 600; color: var(--link); }
[data-theme="dark"] .org-card .n { color: var(--link-bright); }

/* ---------- saved / collections ---------- */
.coll-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.notice {
  border: 1px solid var(--line); border-left: 4px solid var(--gold);
  background: var(--paper-warm); border-radius: 4px;
  padding: 14px 18px; font-size: 15px; color: var(--ink-soft); margin: 20px 0;
}
.analysis-out { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 34px; margin-top: 24px; background: var(--paper-warm); }
.analysis-out h3 { margin: 22px 0 10px; font-size: 19px; }
.analysis-out h3:first-child { margin-top: 0; }
.analysis-out p, .analysis-out li { font-size: 16px; color: var(--ink); }
.analysis-out ul { padding-left: 22px; }
.analysis-out li { margin-bottom: 7px; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 22px; max-width: 860px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%; font-family: var(--sans); font-size: 15.5px;
  border: 1px solid var(--line-dash); border-radius: 4px; padding: 11px 13px;
  background: var(--paper); color: var(--ink);
}
.form-grid textarea { min-height: 120px; resize: vertical; }

/* ---------- log ---------- */
.log-entry { border-top: 1.5px dashed var(--line-dash); padding: 26px 0 30px; display: grid; grid-template-columns: 180px 1fr; gap: 30px; }
.log-entry .d { font-family: var(--serif); font-size: 19px; font-weight: 600; color: var(--link); }
[data-theme="dark"] .log-entry .d { color: var(--link-bright); }
.log-entry h3 { font-size: 19px; margin-bottom: 8px; }
.log-entry p { color: var(--ink-soft); font-size: 16px; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 70px; padding: 46px 0 60px; font-size: 15px; color: var(--ink-faint); }
.site-footer .cols { display: flex; gap: 60px; flex-wrap: wrap; }
.site-footer a { color: var(--ink-soft); }
.site-footer .mission { max-width: 460px; }

/* ---------- toast & modal ---------- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--paper); font-size: 15px;
  padding: 12px 22px; border-radius: 6px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 100;
  max-width: min(92vw, 560px); text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.modal-back {
  position: fixed; inset: 0; background: rgba(10, 20, 14, .55); z-index: 95;
  display: none; align-items: center; justify-content: center; padding: 24px;
}
.modal-back.show { display: flex; }
.modal {
  background: var(--paper); border-radius: 8px; max-width: 560px; width: 100%;
  padding: 34px 36px; box-shadow: var(--shadow); max-height: 86vh; overflow: auto;
}
.modal h3 { font-size: 21px; margin-bottom: 12px; }
.modal p { font-size: 15.5px; color: var(--ink-soft); margin-bottom: 12px; }
.modal .modal-actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

/* ---------- print / PDF ---------- */
.print-only { display: none; }
@media print {
  .site-header, .filters, .header-tools, .try, .searchbar, .no-print,
  .site-footer .cols > div:not(.mission), .toast, .modal-back, .hl-pop { display: none !important; }
  .print-only { display: block; }
  body { font-size: 12px; }
  .hero, .page-hero { background: #fff !important; color: #000 !important; padding: 0 0 20px; }
  .page-hero h1, .hero h1 { color: #000; font-size: 28px; }
  .page-hero h1 em { color: #333; }
  .page-hero .lede, .hero .lede, .eyebrow { color: #333; }
  .browser { grid-template-columns: 1fr; }
  a { color: #000; }
  .card, .bignum { break-inside: avoid; }
  .entry { break-inside: avoid; }
}

/* ---------- responsive ---------- */
@media (max-width: 1200px) {
  .stats { grid-template-columns: repeat(3, 1fr); }
  .org-grid, .grid3 { grid-template-columns: 1fr 1fr; }
  .bignum-grid { grid-template-columns: 1fr 1fr; }
  .main-nav { gap: 18px; }
}
@media (max-width: 900px) {
  .header-inner { padding: 0 20px; gap: 14px; }
  .main-nav { display: none; }
  .mobile-nav-toggle { display: inline-flex !important; }
  .hero-inner, .wrap { padding: 0 20px; }
  .paths, .grid2, .org-grid, .grid3, .form-grid { grid-template-columns: 1fr; }
  .browser { grid-template-columns: 1fr; }
  .filters { position: static; }
  .reader { grid-template-columns: 1fr; }
  .toc { position: static; max-height: none; }
  .stats { grid-template-columns: 1fr 1fr; gap: 14px; }
  .hero { padding: 64px 0 70px; }
  .log-entry { grid-template-columns: 1fr; gap: 8px; }
}
.mobile-nav-toggle { display: none; }
.mobile-nav {
  display: none; position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 55;
  background: var(--paper); border-bottom: 1px solid var(--line); padding: 12px 20px 20px;
}
.mobile-nav.show { display: block; }
.mobile-nav a { display: block; padding: 10px 0; font-size: 17px; color: var(--ink); border-bottom: 1px solid var(--line); }