:root {
  --midnight: #14162b;
  --midnight-2: #1e223d;
  --parchment: #f6f1e7;
  --paper: #fffdf8;
  --ink: #202238;
  --muted: #666879;
  --gold: #d4af37;
  --gold-dark: #8f6c16;
  --aged-gold: #c8a951;
  --oxblood: #8b2d2b;
  --slate: #4a7c9b;
  --line: rgba(32, 34, 56, 0.16);
  --shadow: 0 18px 55px rgba(20, 22, 43, 0.12);
  --serif: "EB Garamond", Georgia, serif;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", Consolas, monospace;
  --measure: 74rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--parchment);
  font-family: var(--sans);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
a { color: var(--gold-dark); text-underline-offset: 0.2em; }
a:hover { color: var(--oxblood); }
img, svg { max-width: 100%; }
button, input, select { font: inherit; }
button, select { cursor: pointer; }
:focus-visible { outline: 3px solid var(--slate); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 1000; top: 0.5rem; left: 0.5rem; transform: translateY(-160%); background: white; color: var(--ink); padding: 0.65rem 1rem; }
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  color: var(--parchment);
  background: rgba(20, 22, 43, 0.96);
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
  backdrop-filter: blur(14px);
}
.nav-shell { width: min(calc(100% - 2rem), var(--measure)); min-height: 4.6rem; margin: auto; display: flex; align-items: center; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; color: white; text-decoration: none; white-space: nowrap; }
.brand-mark { width: 2.1rem; height: 2.1rem; color: var(--gold); }
.site-footer .brand-mark { transform: translateY(.42rem); }
.brand-copy { font-family: var(--serif); font-size: 1.28rem; letter-spacing: 0.02em; }
.brand-copy small { display: block; color: var(--gold); font-family: var(--mono); font-size: 0.53rem; line-height: 1; letter-spacing: 0.16em; text-transform: uppercase; }
.nav-toggle { display: none; margin-left: auto; border: 1px solid rgba(255,255,255,.25); border-radius: 0.35rem; color: white; background: transparent; padding: 0.5rem 0.7rem; }
.site-nav { display: flex; align-items: center; gap: 1.15rem; margin-left: auto; }
.site-nav a { color: rgba(255,255,255,.8); font-size: .84rem; font-weight: 650; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--gold); }
.site-nav a.nav-tool { color: var(--gold); }
.site-nav a.nav-tool:hover, .site-nav a.nav-tool[aria-current="page"] { color: rgba(255,255,255,.8); }
.nav-cta { border: 1px solid var(--gold); border-radius: 999px; padding: .45rem .8rem; }

.hero { position: relative; overflow: hidden; color: var(--parchment); background: var(--midnight); }
.hero::before { content: ""; position: absolute; inset: -20% -10%; opacity: .33; background: radial-gradient(circle at 74% 30%, rgba(74,124,155,.65), transparent 24%), repeating-radial-gradient(circle at 74% 40%, transparent 0 38px, rgba(212,175,55,.22) 39px 40px); }
.hero::after { content: ""; position: absolute; inset: auto -10% -3rem 38%; height: 18rem; border: 1px solid rgba(212,175,55,.5); transform: skew(-28deg); opacity: .35; }
.hero-grid { position: relative; z-index: 1; width: min(calc(100% - 2rem), var(--measure)); min-height: 38rem; margin: auto; padding: 5rem 0 4rem; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(20rem, .88fr); align-items: start; gap: 4rem; }
.kicker { margin: 0 0 .8rem; color: var(--gold); font-family: var(--mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; }
h1, h2, h3, h4 { margin: 0 0 .65em; font-family: var(--serif); line-height: 1.04; text-wrap: balance; }
h1 { max-width: 12ch; font-size: clamp(3.4rem, 8vw, 7rem); font-weight: 500; letter-spacing: -.04em; }
h2 { font-size: clamp(2.1rem, 4.5vw, 3.8rem); font-weight: 550; }
h3 { font-size: clamp(1.35rem, 2vw, 1.75rem); }
.hero .lede { max-width: 41rem; margin-bottom: 0; color: rgba(246,241,231,.78); font-family: var(--serif); font-size: clamp(1.22rem, 2.2vw, 1.55rem); line-height: 1.28; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.7rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 2.85rem; border: 1px solid var(--gold); border-radius: .25rem; padding: .65rem 1rem; color: var(--midnight); background: var(--gold); font-size: .82rem; font-weight: 800; letter-spacing: .04em; text-decoration: none; }
.button:hover { color: var(--midnight); background: #e5c557; }
.button.secondary { color: var(--parchment); background: transparent; }
.button.secondary:hover { color: white; background: rgba(255,255,255,.08); }
.hero-figure { position: relative; min-height: 26rem; display: grid; place-items: start center; }
.pyramid-orbit { width: min(30rem, 88vw); aspect-ratio: 1; animation: breathe 8s ease-in-out infinite; }
@keyframes breathe { 50% { transform: translateY(-.5rem); } }
.measure-strip { position: absolute; right: 0; bottom: 2rem; left: 0; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(212,175,55,.35); background: rgba(20,22,43,.8); }
.measure-strip div { padding: .75rem; border-right: 1px solid rgba(212,175,55,.25); }
.measure-strip div:last-child { border-right: 0; }
.measure-strip strong { display: block; color: var(--gold); font-family: var(--mono); font-size: .92rem; }
.measure-strip span { color: rgba(255,255,255,.58); font-size: .68rem; }

.page-hero { color: var(--parchment); background: var(--midnight); border-bottom: 1px solid rgba(212,175,55,.4); }
.page-hero-inner { width: min(calc(100% - 2rem), var(--measure)); margin: auto; padding: 5rem 0 4rem; }
.page-hero h1 { max-width: 18ch; font-size: clamp(3rem, 7vw, 5.8rem); }
.page-hero .lede { max-width: 48rem; color: rgba(246,241,231,.76); font-family: var(--serif); font-size: 1.35rem; }
.breadcrumbs { margin-bottom: 1.3rem; color: rgba(255,255,255,.55); font-size: .75rem; }
.breadcrumbs a { color: var(--gold); }


/* Keep the primary menu-level page headers on one shared vertical rhythm. */
.converter-page > main > .section:first-of-type { padding: 2.75rem 0 0; }
.converter-page .tool-panel .eyebrow { margin-bottom: .65rem; }

.section { padding: 5.2rem 0; }
.section-action { margin-top: 1.5rem; }
.section-action.spacious { margin-top: 2rem; }
.swap-button { margin-bottom: 1rem; }
.table-scroll { overflow-x: auto; }
.section.tight { padding: 1.25rem 0 3.25rem; }
.converter-page > main > .section.tight { padding-top: 0; padding-bottom: 1.25rem; }
.converter-page .callout { margin-top: 0; }
.section.dark { color: var(--parchment); background: var(--midnight); }
.section.blue { color: white; background: var(--slate); }
.shell { width: min(calc(100% - 2rem), var(--measure)); margin: auto; }
.narrow { width: min(calc(100% - 2rem), 49rem); margin: auto; }
.section-head { max-width: 46rem; margin-bottom: 2.5rem; }
.section-head p { color: var(--muted); font-family: var(--serif); font-size: 1.2rem; }
.dark .section-head p { color: rgba(255,255,255,.7); }
.eyebrow { color: var(--oxblood); font-family: var(--mono); font-size: .7rem; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.dark .eyebrow { color: var(--gold); }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.4rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1rem; }
.card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: .55rem; padding: 1.55rem; background: rgba(255,255,255,.58); box-shadow: 0 8px 25px rgba(20,22,43,.05); }
.card p { color: var(--muted); }
.card-link { color: inherit; text-decoration: none; }
.card-link:hover h3 { color: var(--oxblood); }
.card .meta { color: var(--gold-dark); font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.feature-card { min-height: 18rem; display: flex; flex-direction: column; justify-content: flex-end; color: white; background: var(--midnight-2); border-color: rgba(212,175,55,.3); }
.feature-card p { color: rgba(255,255,255,.65); }
.feature-card .meta { color: var(--gold); }
.feature-card .button { align-self: flex-start; margin-top: auto; }
.dark .card:not(.feature-card) { color: var(--ink); background: var(--paper); }
.dark .card:not(.feature-card) p { color: var(--muted); }

.tool-wrap { display: grid; grid-template-columns: minmax(0, .9fr) minmax(22rem, 1.1fr); gap: 1.4rem; align-items: stretch; }
.tool-panel, .result-panel { border: 1px solid var(--line); border-radius: .6rem; padding: clamp(1.25rem, 3vw, 2rem); background: var(--paper); box-shadow: var(--shadow); }
.result-panel { position: sticky; top: 6rem; color: var(--parchment); background: var(--midnight); border-color: rgba(212,175,55,.35); }
.field { margin-bottom: 1rem; }
.field label { display: block; margin-bottom: .38rem; color: var(--muted); font-size: .75rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.field input, .field select { width: 100%; min-height: 3.1rem; border: 1px solid #bbb9b0; border-radius: .3rem; padding: .6rem .75rem; color: var(--ink); background: white; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.result-number { margin: .25rem 0; color: var(--gold); font-family: var(--mono); font-size: clamp(2.3rem, 6vw, 4.7rem); line-height: 1; overflow-wrap: anywhere; }
.result-unit { color: rgba(255,255,255,.7); font-family: var(--serif); font-size: 1.35rem; }
.result-note { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.67); font-size: .82rem; }
.result-note a { color: var(--gold); }
.status { min-height: 1.5rem; font-size: .8rem; }
.copy-status { color: var(--gold); }
.formula-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .7rem; margin-top: 1rem; }
.metric-box { padding: 1rem; border: 1px solid rgba(212,175,55,.25); background: rgba(255,255,255,.04); }
.metric-box span { display: block; color: rgba(255,255,255,.56); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.metric-box strong { display: block; margin-top: .3rem; color: white; font-family: var(--mono); font-size: 1.05rem; }

.evidence-key { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.3rem 0; }
.badge { display: inline-flex; align-items: center; gap: .35rem; border-radius: 999px; padding: .28rem .58rem; font-family: var(--mono); font-size: .65rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.badge.measured { color: #173447; background: #dbeaf2; }
.badge.interpretation { color: #6f201f; background: #f4dedd; }
.badge.derived { color: #604a0f; background: #f2e7be; }
.callout { margin: 2rem 0; border-left: 4px solid var(--slate); padding: 1rem 1.2rem; background: #e8f0f3; }
.callout.theory { border-left-color: var(--oxblood); background: #f5e7e4; }
.callout strong { display: block; margin-bottom: .35rem; font-family: var(--serif); font-size: 1.25rem; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 17rem; gap: 4rem; align-items: start; }
.prose { font-family: var(--serif); font-size: 1.16rem; }
.prose h2 { margin-top: 2.1em; font-size: 2.25rem; }
.prose h3 { margin-top: 1.8em; }
.prose p { margin: 0 0 1.25em; }
.prose li { margin-bottom: .55rem; }
.prose .mono, .mono { font-family: var(--mono); }
.article-aside { position: sticky; top: 6rem; border-top: 3px solid var(--gold); padding-top: 1rem; font-size: .8rem; }
.article-aside h2 { font-size: 1.35rem; }
.article-aside ul { padding-left: 1rem; }
.article-aside li { margin-bottom: .65rem; }
.source-list { padding-left: 1.2rem; }
.source-list li { margin-bottom: .7rem; overflow-wrap: anywhere; }
.data-table { width: 100%; border-collapse: collapse; font-size: .84rem; }
.data-table th, .data-table td { border-bottom: 1px solid var(--line); padding: .65rem .45rem; text-align: left; vertical-align: top; }
.data-table th { color: var(--muted); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; }

.giza-intro { max-width: 48rem; margin-bottom: 2.5rem; }
.giza-intro h2 { max-width: 16ch; }
.giza-intro p:last-child { max-width: 44rem; color: rgba(246,241,231,.76); font-family: var(--serif); font-size: 1.2rem; }
.giza-stage { display: grid; grid-template-columns: 1.06fr .94fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.giza-diagram { margin: 0; border: 1px solid rgba(212,175,55,.36); background: radial-gradient(circle at 50% 42%, rgba(74,124,155,.26), transparent 55%), var(--midnight-2); }
.giza-diagram svg { display: block; width: 100%; height: auto; padding: clamp(1rem, 3vw, 1.8rem); }
.giza-diagram figcaption { padding: .9rem 1.1rem; border-top: 1px solid rgba(212,175,55,.22); color: rgba(246,241,231,.72); font-size: .78rem; }
.giza-controls { color: var(--parchment); }
.giza-controls h3 { max-width: 15ch; margin-top: .7rem; font-size: clamp(2rem, 4vw, 3.35rem); }
.giza-selected-head { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.giza-selected-head .kicker { margin: 0; }
.giza-result { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem .8rem; margin: 1rem 0 .75rem; }
.giza-result-value { color: var(--gold); font-family: var(--mono); font-size: clamp(2.7rem, 5vw, 4.35rem); line-height: 1; }
.giza-result-unit { color: rgba(246,241,231,.78); font-family: var(--serif); font-size: 1.25rem; }
.giza-model-note { max-width: 38rem; margin-bottom: .6rem; font-size: 1rem; }
.giza-difference { margin: 0; color: #f2cf67; font-family: var(--mono); font-size: .82rem; }
.giza-reference-note { display: flex; justify-content: space-between; gap: 1rem; margin: 1.25rem 0 1.5rem; border-block: 1px solid rgba(246,241,231,.16); padding: .85rem 0; color: rgba(246,241,231,.68); font-size: .75rem; }
.giza-reference-note strong { color: var(--parchment); font-family: var(--mono); font-weight: 650; text-align: right; }
.model-selector { margin: 0; border: 0; padding: 0; }
.model-selector legend { margin-bottom: .65rem; color: var(--parchment); font-size: .76rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.model-options { display: grid; gap: .55rem; }
.model-option { position: relative; display: block; cursor: pointer; }
.model-option input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.model-option span { display: grid; grid-template-columns: minmax(7rem,.55fr) minmax(0,1fr); align-items: center; gap: .8rem; min-height: 3.7rem; border: 1px solid rgba(246,241,231,.24); border-radius: .35rem; padding: .65rem .8rem; background: rgba(255,255,255,.035); }
.model-option strong { color: var(--parchment); font-family: var(--serif); font-size: 1.12rem; }
.model-option small { color: rgba(246,241,231,.68); font-size: .72rem; }
.model-option:hover span { border-color: rgba(212,175,55,.65); background: rgba(212,175,55,.06); }
.model-option input:checked + span { border-color: var(--gold); background: rgba(212,175,55,.12); box-shadow: inset 4px 0 0 var(--gold); }
.model-option input:focus-visible + span { outline: 3px solid var(--slate); outline-offset: 3px; }
.theory-cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1rem; margin-top: 2.5rem; }
.theory-card { border: 1px solid rgba(32,34,56,.14); border-top: 4px solid var(--oxblood); padding: 1.35rem; color: var(--ink); background: var(--paper); box-shadow: 0 10px 26px rgba(0,0,0,.12); }
.theory-card h3 { color: var(--ink); }
.theory-card p { color: #505262; }
.theory-card strong { color: #6f201f; font-family: var(--mono); }
.theory-card.measured-card { border-top-color: var(--slate); }
.theory-card.measured-card strong { color: #244e67; }
.theory-card[data-active="true"] { border-color: var(--gold); box-shadow: 0 0 0 2px var(--gold), 0 14px 34px rgba(0,0,0,.2); }

.monument-figure { margin: 2.6rem 0 3rem; border: 1px solid rgba(212,175,55,.38); color: var(--parchment); background: var(--midnight-2); box-shadow: 0 16px 38px rgba(20,22,43,.16); }
.monument-figure-head { padding: clamp(1.25rem,3vw,2rem); background: radial-gradient(circle at 92% 8%, rgba(74,124,155,.2), transparent 42%); }
.monument-figure-head .badge { margin-bottom: .85rem; }
.monument-figure-head .eyebrow { margin-bottom: .3rem; color: var(--gold); }
.monument-figure-head h2 { max-width: 18ch; margin: 0 0 .7rem; color: var(--parchment); font-size: clamp(1.9rem,4vw,3rem); }
.monument-figure-head > p:last-child { max-width: 46rem; margin: 0; color: rgba(246,241,231,.74); font-family: var(--serif); font-size: 1.05rem; }
.monument-diagram { border-block: 1px solid rgba(212,175,55,.22); background: radial-gradient(circle at 50% 45%, rgba(74,124,155,.17), transparent 58%), #101226; }
.monument-diagram svg { display: block; width: 100%; height: auto; }
.monument-diagram .diagram-line-gold, .monument-diagram .diagram-line-slate, .monument-diagram .diagram-line-muted, .monument-diagram .diagram-line-theory { fill: none; vector-effect: non-scaling-stroke; }
.monument-diagram .diagram-line-gold { stroke: var(--gold); stroke-width: 2.5; }
.monument-diagram .diagram-line-slate { stroke: #74a8c5; stroke-width: 2; }
.monument-diagram .diagram-line-muted { stroke: rgba(246,241,231,.48); stroke-width: 1.5; }
.monument-diagram .diagram-line-theory { stroke: #c86560; stroke-width: 2.5; stroke-dasharray: 8 7; }
.monument-diagram .diagram-fill-gold { fill: rgba(212,175,55,.18); stroke: var(--gold); stroke-width: 2; }
.monument-diagram .diagram-fill-slate { fill: rgba(74,124,155,.2); stroke: #74a8c5; stroke-width: 1.5; }
.monument-diagram .diagram-dimension { stroke-width: 1.4; }
.monument-diagram .diagram-axis { stroke-width: 3.5; }
.monument-diagram .diagram-column-gold { fill: rgba(212,175,55,.28); stroke: var(--gold); stroke-width: 1.5; }
.monument-diagram .diagram-label, .monument-diagram .diagram-value { fill: rgba(246,241,231,.78); font-family: var(--mono); font-size: 12px; letter-spacing: .04em; }
.monument-diagram .diagram-value { fill: var(--gold); font-size: 25px; font-weight: 750; letter-spacing: 0; }
.monument-diagram .diagram-theory-text { fill: #e7a19d; }
.monument-metrics { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); }
.monument-metric { padding: 1rem 1.1rem; border-right: 1px solid rgba(246,241,231,.14); }
.monument-metric:last-child { border-right: 0; }
.monument-metric span, .monument-metric small { display: block; }
.monument-metric span { color: var(--gold); font-family: var(--mono); font-size: .62rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.monument-metric strong { display: block; margin: .35rem 0 .25rem; color: var(--parchment); font-family: var(--mono); font-size: 1.05rem; }
.monument-metric small { color: rgba(246,241,231,.62); font-family: var(--sans); font-size: .68rem; line-height: 1.45; }
.monument-figure figcaption { padding: .85rem 1.1rem; border-top: 1px solid rgba(246,241,231,.14); color: rgba(246,241,231,.62); font-family: var(--sans); font-size: .7rem; line-height: 1.5; }
.monument-figure figcaption span { display: block; margin-top: .25rem; }
.monument-figure figcaption a { color: #f0cf67; }

.selection-note { display: grid; grid-template-columns: minmax(0,.85fr) minmax(20rem,1.15fr); gap: clamp(2rem,5vw,5rem); align-items: end; margin-bottom: 3rem; }
.selection-note h2 { max-width: 15ch; }
.selection-note > p { margin: 0; color: var(--muted); font-family: var(--serif); font-size: 1.2rem; }
.temple-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.temple-card { display: grid; grid-template-columns: 4.2rem minmax(0,1fr); min-height: 20rem; border: 1px solid var(--line); color: var(--ink); background: rgba(255,255,255,.58); box-shadow: 0 10px 28px rgba(20,22,43,.07); text-decoration: none; }
.temple-card:hover { color: var(--ink); border-color: var(--gold-dark); background: var(--paper); transform: translateY(-2px); }
.temple-rank { display: grid; place-items: start center; padding-top: 1.3rem; color: var(--gold-dark); background: rgba(212,175,55,.12); font-family: var(--mono); font-size: 1.45rem; font-weight: 800; }
.temple-card-body { display: flex; flex-direction: column; align-items: flex-start; padding: 1.3rem 1.4rem 1.4rem; }
.temple-location { margin: .7rem 0 .2rem; color: var(--muted); font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.temple-card-body > strong { color: var(--ink); font-family: var(--serif); font-size: clamp(1.65rem,3vw,2.25rem); line-height: 1.05; }
.temple-summary { margin: .75rem 0 1.2rem; color: #505262; }
.temple-detail { display: grid; grid-template-columns: 7.3rem minmax(0,1fr); gap: .6rem; width: 100%; margin-top: auto; border-top: 1px solid var(--line); padding-top: .65rem; color: #505262; font-size: .75rem; }
.temple-detail + .temple-detail { margin-top: .55rem; }
.temple-detail b { color: var(--gold-dark); font-family: var(--mono); font-size: .65rem; letter-spacing: .04em; text-transform: uppercase; }
.feature-link { display: flex; justify-content: space-between; align-items: end; gap: 2rem; border: 1px solid rgba(212,175,55,.4); padding: clamp(1.2rem,3vw,2rem); color: var(--parchment); background: rgba(255,255,255,.04); text-decoration: none; }
.feature-link:hover { color: white; border-color: var(--gold); background: rgba(212,175,55,.08); }
.feature-link small { display: block; color: var(--gold); font-family: var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.feature-link strong { display: block; margin-top: .35rem; font-family: var(--serif); font-size: clamp(1.7rem,4vw,2.8rem); line-height: 1.05; }
.site-facts { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border: 1px solid var(--line); background: var(--paper); box-shadow: var(--shadow); }
.site-facts > div { padding: 1.1rem; border-right: 1px solid var(--line); }
.site-facts > div:last-child { border-right: 0; }
.site-facts span { display: block; margin-bottom: .4rem; color: var(--gold-dark); font-family: var(--mono); font-size: .65rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.site-facts strong { display: block; color: var(--ink); font-family: var(--serif); font-size: 1.15rem; line-height: 1.2; }
.site-facts small { display: block; margin-top: .35rem; color: var(--muted); font-family: var(--sans); font-size: .72rem; font-weight: 400; line-height: 1.4; }

.site-footer { color: rgba(255,255,255,.7); background: #0d0f20; border-top: 3px solid var(--gold); }
.footer-grid { width: min(calc(100% - 2rem), var(--measure)); margin: auto; padding: 3.5rem 0; display: grid; grid-template-columns: minmax(18rem,1.5fr) repeat(2,minmax(10rem,1fr)); gap: 2rem; }
.site-footer h2 { color: white; font-size: 1.25rem; }
.footer-links { padding-top: .15rem; }
.site-footer a { display: block; margin: .4rem 0; color: rgba(255,255,255,.68); font-size: .78rem; text-decoration: none; }
.site-footer a:hover { color: var(--gold); }
.footer-note { width: min(calc(100% - 2rem), var(--measure)); margin: auto; padding: 1rem 0 1.5rem; border-top: 1px solid rgba(255,255,255,.1); font-size: .68rem; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; inset: 4.6rem 0 auto; align-items: stretch; flex-direction: column; gap: 0; padding: .5rem 1rem 1rem; background: var(--midnight); border-bottom: 1px solid var(--gold); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .75rem; }
  .hero-grid, .tool-wrap, .giza-stage, .article-layout { grid-template-columns: 1fr; }
  .hero-grid { padding-top: 3.5rem; gap: 1rem; }
  .hero-figure { min-height: 22rem; place-items: center; }
  .result-panel, .article-aside { position: static; }
  .grid-4, .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .theory-cards { grid-template-columns: 1fr; }
  .giza-controls { max-width: 42rem; }
  .selection-note { grid-template-columns: 1fr; align-items: start; }
  .temple-grid { grid-template-columns: 1fr; }
  .site-facts { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .monument-metrics { grid-template-columns: 1fr; }
  .monument-metric { border-right: 0; border-bottom: 1px solid rgba(246,241,231,.14); }
  .monument-metric:last-child { border-bottom: 0; }
  .site-facts > div:nth-child(2) { border-right: 0; }
  .site-facts > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 620px) {
  .brand-copy small { display: none; }
  .hero-grid { min-height: auto; }
  .hero-figure { min-height: 18rem; }
  .measure-strip { bottom: 0; }
  .grid-2, .grid-3, .grid-4, .field-row, .formula-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 3.7rem 0; }
  .page-hero-inner { padding: 3.6rem 0 3rem; }
  .data-table { display: block; overflow-x: auto; }
  .model-option span { grid-template-columns: 1fr; gap: .15rem; }
  .giza-reference-note { display: grid; }
  .giza-reference-note strong { text-align: left; }
  .temple-card { grid-template-columns: 3.25rem minmax(0,1fr); }
  .temple-card-body { padding: 1rem; }
  .temple-detail { grid-template-columns: 1fr; gap: .15rem; }
  .feature-link { align-items: start; flex-direction: column; }
  .site-facts { grid-template-columns: 1fr; }
  .site-facts > div, .site-facts > div:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .site-facts > div:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media print {
  .site-header, .site-footer, .hero-actions, .button, .nav-toggle { display: none !important; }
  body { color: black; background: white; }
  .page-hero, .hero, .result-panel { color: black; background: white; }
  .section { padding: 1rem 0; }
  a { color: black; text-decoration: none; }
}


/* v3 three-converter unit catalogue */
.unit-catalogue-section + .unit-catalogue-section { margin-top: 4rem; }
.unit-catalogue-section .section-head { margin-bottom: 1.5rem; }
.unit-catalogue-section .section-head p:last-child { max-width: 48rem; }
.temple-card { grid-template-columns: 6.8rem minmax(0,1fr); }
.temple-rank.unit-symbol { padding: 1.3rem .4rem 0; overflow-wrap: anywhere; text-align: center; font-size: clamp(.78rem,1.4vw,1.15rem); line-height: 1.15; }
@media (max-width: 620px) {
  .temple-card { grid-template-columns: 5rem minmax(0,1fr); }
  .temple-rank.unit-symbol { padding-inline: .25rem; font-size: .75rem; }
}


/* Treasure: composition, coinage and optional user-priced melt value. */
.treasure-hero { background-image: radial-gradient(circle at 82% 28%, rgba(212,175,55,.18), transparent 28%), linear-gradient(135deg, var(--midnight), #20233f); }
.treasure-tool { align-items: start; }
.treasure-tool details { margin: 1rem 0 1.25rem; border: 1px solid var(--line); border-radius: .45rem; padding: .85rem 1rem; background: rgba(212,175,55,.055); }
.treasure-tool summary { cursor: pointer; color: var(--ink-deep); font-weight: 750; }
.treasure-tool .microcopy { margin: .65rem 0 1rem; color: var(--muted); font-size: .9rem; }
.treasure-result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; margin: 1rem 0 1.35rem; }
.treasure-result-grid > div { min-height: 5.3rem; padding: .8rem; border: 1px solid rgba(212,175,55,.25); border-radius: .35rem; background: rgba(255,255,255,.04); }
.treasure-result-grid span { display: block; margin-bottom: .35rem; color: rgba(246,241,231,.68); font-size: .7rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.treasure-result-grid strong { display: block; color: var(--parchment); font-family: var(--mono); font-size: clamp(.92rem, 2vw, 1.15rem); line-height: 1.35; }
.treasure-result-grid .treasure-value { grid-column: 1 / -1; border-color: rgba(212,175,55,.5); }
.treasure-page [hidden] { display: none !important; }
@media (max-width: 640px) { .treasure-result-grid { grid-template-columns: 1fr; } .treasure-result-grid .treasure-value { grid-column: auto; } }

/* unit-enrichment-v1 */
.unit-enrichment { margin-bottom: 2.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--line); }
.unit-enrichment > h2:first-child { margin-top: 0; }
.unit-source-quotes { display: grid; gap: 1rem; margin: 1.25rem 0; }
.unit-source-quote { margin: 0; padding: 1rem 1.15rem; border-left: 3px solid var(--gold); background: var(--paper); }
.unit-source-quote p { margin: 0 0 .45rem; font-family: var(--serif); font-size: 1.16rem; line-height: 1.35; }
.unit-source-quote cite { display: block; font-size: .86rem; font-style: normal; color: var(--muted); }
.unit-source-quote cite span { color: var(--ink); }
.unit-source-gap, .unit-quote-intro { padding: .85rem 1rem; background: var(--paper); border-left: 3px solid var(--slate); font-size: .95rem; }