/* Faith thru Physics — public observatory skin */
:root,
:root:not([data-theme=dark]),
:root[data-theme=light],
:root[data-theme=dark] {
  --p-void: oklch(14.5% 0.006 85);
  --p-screen: oklch(18.5% 0.008 85);
  --p-raised: oklch(22.5% 0.012 85);
  --p-gold: oklch(75% 0.145 85);
  --p-gold-bright: oklch(84% 0.14 88);
  --p-ink: oklch(90% 0.015 85);
  --p-muted: oklch(68% 0.018 85);
  --p-faint: oklch(49% 0.014 85);
  --p-line: oklch(35% 0.025 85 / 0.72);
  --bg: var(--p-void);
  --surface: var(--p-screen);
  --surface-raised: var(--p-raised);
  --accent: var(--p-gold);
  --text: var(--p-ink);
  --text-muted: var(--p-muted);
  --line: var(--p-line);
  --surface-000: #0a0a0a;
  --surface-100: #121110;
  --surface-200: #1a1815;
  --ink: #e8e3db;
  --ink-muted: #a39b8d;
  --hairline: #353027;
  --gold: #d4af37;
  --gold-soft: #2a2312;
  --warrant-proved: #f0c64a;
  --warrant-conditional: #3cbfae;
  --warrant-admitted: #7aa7f2;
  --warrant-open: #9b968c;
  --warrant-disputed: #e9963f;
  --warrant-failed: #f2705f;
  --font-serif: "Crimson Text", "Iowan Old Style", Georgia, serif;
  --font-display: "Cormorant Garamond", "Iowan Old Style", Georgia, serif;
  --font-sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--gold); color: #11100d; }
a, button, input, select, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}
button, a, summary { touch-action: manipulation; }
main { min-height: calc(100dvh - 160px); }
.skip {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  background: var(--gold);
  color: #11100d;
  transform: translateY(-160%);
  transition: transform 180ms ease-out;
}
.skip:focus { transform: translateY(0); }

/* Site frame */
.site-head {
  position: sticky;
  z-index: 10;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 40px;
  min-height: 76px;
  padding: 0 max(32px, calc((100vw - 1440px) / 2));
  border-bottom: 1px solid var(--line);
  background: oklch(14.5% 0.006 85 / 0.9);
  backdrop-filter: blur(18px);
}
.site-name {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  color: var(--text);
  text-decoration: none;
}
.site-sigil {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
  font: 400 20px/1 var(--font-display);
}
.site-wordmark {
  font: 500 22px/1 var(--font-display);
  letter-spacing: -0.02em;
}
.site-head nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.site-head nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--text-muted);
  font: 500 12px/1 var(--font-sans);
  text-decoration: none;
  transition: color 180ms ease-out;
}
.site-head nav a::after {
  position: absolute;
  right: 14px;
  bottom: 4px;
  left: 14px;
  height: 1px;
  background: var(--gold);
  content: "";
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}
.site-head nav a:hover, .site-head nav a.active { color: var(--text); }
.site-head nav a.active::after { opacity: 1; transform: scaleX(1); }
.site-meta { display: flex; align-items: center; gap: 20px; }
.site-author {
  color: var(--text-muted);
  font: 400 10px/1 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.site-audit {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--gold);
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.04em;
  text-decoration: none;
}
.site-audit:hover { color: var(--p-gold-bright); }
.site-foot {
  margin-top: 0;
  padding: 32px max(32px, calc((100vw - 1344px) / 2));
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}
.footer-sign {
  flex: none;
  color: var(--gold);
  font: 400 10px/1.7 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.site-foot p {
  max-width: 720px;
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.7;
  text-align: right;
}
.site-foot a { color: var(--text); text-underline-offset: 3px; }

/* Homepage — the argument is the hero */
.home { position: relative; max-width: none; margin: 0; padding: 0; overflow: hidden; }
.home-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
  align-items: center;
  gap: clamp(48px, 6vw, 96px);
  max-width: 1440px;
  min-height: min(840px, calc(100dvh - 76px));
  margin: 0 auto;
  padding: 88px 48px 80px;
}
.home-hero::before {
  position: absolute;
  z-index: -2;
  top: -0.12em;
  right: -0.04em;
  color: var(--gold);
  content: "A0";
  font: 500 min(36vw, 520px)/1 var(--font-mono);
  letter-spacing: -0.14em;
  opacity: 0.018;
  pointer-events: none;
}
.home-field {
  position: absolute;
  z-index: -1;
  inset: 0;
  color: var(--gold);
  pointer-events: none;
}
.home-field svg { width: 100%; height: 100%; }
.home-copy { position: relative; z-index: 1; max-width: 720px; }
.home-kicker, .home-section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 28px;
  color: var(--gold);
  font: 500 10px/1.5 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.home-kicker::before {
  width: 28px;
  height: 1px;
  background: var(--gold);
  content: "";
}
.home h1 {
  max-width: 720px;
  margin: 0;
  color: var(--text);
  font: 300 clamp(72px, 7.2vw, 110px)/0.88 var(--font-display);
  letter-spacing: -0.052em;
}
.home h1 em { color: var(--gold); font-weight: 300; }
.home-lede {
  max-width: 620px;
  margin: 36px 0 0;
  color: var(--text-muted);
  font: 400 18px/1.7 var(--font-sans);
}
.home-actions { display: flex; align-items: center; gap: 28px; margin-top: 40px; }
.home-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  background: var(--gold);
  color: #11100d;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 180ms ease-out, color 180ms ease-out, transform 180ms ease-out;
}
.home-primary:hover { background: var(--p-gold-bright); transform: translateY(-2px); }
.home-secondary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font: 500 12px/1 var(--font-sans);
  text-decoration: none;
  transition: border-color 180ms ease-out, color 180ms ease-out;
}
.home-secondary:hover { border-color: var(--gold); color: var(--gold); }
.home-invitation {
  max-width: 520px;
  margin: 32px 0 0;
  padding-left: 16px;
  border-left: 1px solid var(--gold);
  color: var(--text-muted);
  font: 400 12px/1.75 var(--font-sans);
}

/* Real framework snapshot */
.observatory {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 560px;
  justify-self: end;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: oklch(18.5% 0.008 85 / 0.94);
  box-shadow: 0 32px 80px oklch(0% 0 0 / 0.28);
}
.observatory::before {
  position: absolute;
  top: -1px;
  right: 30%;
  left: 30%;
  height: 2px;
  background: var(--gold);
  content: "";
}
.observatory-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-muted);
  font: 500 9px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.observatory-status { display: inline-flex; align-items: center; gap: 7px; color: var(--gold); }
.observatory-status i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px oklch(75% 0.145 85 / 0.09);
}
.observatory-count {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  gap: 24px;
  margin: 38px 0 32px;
}
.observatory-count strong {
  color: var(--gold);
  font: 400 clamp(64px, 6vw, 88px)/0.82 var(--font-mono);
  letter-spacing: -0.09em;
  font-variant-numeric: tabular-nums;
}
.observatory-count > span {
  padding-bottom: 2px;
  color: var(--text);
  font: 500 12px/1.4 var(--font-sans);
}
.observatory-count small {
  display: block;
  max-width: 180px;
  margin-top: 7px;
  color: var(--text-muted);
  font: 400 11px/1.55 var(--font-sans);
}
.observatory-chain {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.chain-node { display: grid; justify-items: center; gap: 10px; text-align: center; }
.chain-ring {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
  font: 500 15px/1 var(--font-mono);
}
.chain-node:nth-of-type(3) .chain-ring { border-color: var(--warrant-conditional); color: var(--warrant-conditional); }
.chain-node:nth-of-type(5) .chain-ring { border-color: var(--text-muted); color: var(--text); }
.chain-label {
  max-width: 86px;
  color: var(--text-muted);
  font: 400 8px/1.5 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.chain-line { position: relative; height: 1px; margin-bottom: 27px; background: var(--line); }
.chain-line::after {
  position: absolute;
  top: -2px;
  right: 0;
  width: 5px;
  height: 5px;
  border-top: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
  content: "";
  transform: rotate(45deg);
}
.observatory-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.observatory-metrics > div { display: grid; gap: 7px; }
.observatory-metrics strong {
  color: var(--text);
  font: 500 20px/1 var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.observatory-metrics span {
  color: var(--text-muted);
  font: 400 8px/1.5 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.observatory-note {
  margin: 20px 0 0;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.65;
}
.observatory-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  margin-top: 18px;
  color: var(--gold);
  font: 500 11px/1.4 var(--font-mono);
  text-decoration: none;
}
.observatory-link span:last-child { font-size: 18px; transition: transform 180ms ease-out; }
.observatory-link:hover span:last-child { transform: translateX(4px); }

/* The public standard */
.home-standard {
  display: grid;
  grid-template-columns: minmax(160px, 0.42fr) minmax(0, 1fr);
  gap: 48px;
  padding: 80px max(48px, calc((100vw - 1344px) / 2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.home-standard .home-section-label { margin: 10px 0 0; }
.home-standard h2, .home-entry h2 {
  max-width: 850px;
  margin: 0;
  color: var(--text);
  font: 300 clamp(42px, 4.2vw, 62px)/1.02 var(--font-display);
  letter-spacing: -0.035em;
}
.home-standard > div > p {
  max-width: 780px;
  margin: 24px 0 0;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.75;
}
.standard-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}
.standard-notes > div { padding-top: 16px; border-top: 1px solid var(--line); }
.standard-notes strong {
  display: block;
  margin-bottom: 9px;
  color: var(--gold);
  font: 500 9px/1.5 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.standard-notes span { color: var(--text-muted); font-size: 12px; line-height: 1.65; }

/* Three real ways in */
.home-entry { max-width: 1440px; margin: 0 auto; padding: 96px 48px 88px; }
.home-entry-head { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 48px; }
.home-entry-head p {
  max-width: 520px;
  justify-self: end;
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}
.home-ways { display: block; margin-top: 56px; border-top: 1px solid var(--line); }
.home-way {
  display: grid;
  grid-template-columns: 120px minmax(210px, 0.9fr) minmax(280px, 1.25fr) auto;
  align-items: center;
  gap: 28px;
  min-height: 112px;
  padding: 24px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--text);
  text-decoration: none;
}
.home-way-kind {
  color: var(--text-muted);
  font: 500 9px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.home-way-title {
  font: 400 34px/1.05 var(--font-display);
  letter-spacing: -0.025em;
  transition: color 180ms ease-out;
}
.home-way > span:nth-child(3) { color: var(--text-muted); font-size: 13px; line-height: 1.65; }
.home-way-arrow { color: var(--gold); font: 400 24px/1 var(--font-display); transition: transform 180ms ease-out; }
.home-way:hover .home-way-title { color: var(--gold); }
.home-way:hover .home-way-arrow { transform: translateX(6px); }
.home-ledger { max-width: 1440px; margin: 0 auto; padding: 0 48px 96px; }
.home-status {
  max-width: none;
  margin: 0;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font: 400 20px/1.6 var(--font-display);
}
.home-status a { color: var(--gold); text-decoration-thickness: 1px; text-underline-offset: 5px; }
.home-key { display: flex; flex-wrap: wrap; gap: 18px 28px; margin: 30px 0 0; }
.home-key > div { margin: 0; }
.home-key .ftp-marker-label {
  font: 400 9px/1.5 var(--font-mono);
  letter-spacing: 0.03em;
}
.home-key .ftp-marker svg { width: 14px; height: 14px; }

/* Consistent reading and research surfaces */
.page-pad { max-width: 1440px; margin: 0 auto; padding: 64px 48px 96px; }
.page-pad.narrow { max-width: 1020px; }
.page-title, .paper-head h1, .graph-page h1, .status-page h1, .town-page h1 {
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.035em;
}
.page-title { margin: 0 0 20px; font-size: clamp(52px, 6vw, 78px); line-height: 0.95; }
.paper-head h1 { line-height: 0.95; }
.graph-head > p, .status-page > header > p, .town-head > p { max-width: 1120px; line-height: 1.7; }
.series-block { border-top: 1px solid var(--line); padding-top: 28px; }
.series-block h2 { font: 400 32px/1.2 var(--font-display); }
.plain-list a, .paper-body p, .paper-head .muted { line-height: 1.75; }
.paper-head { border-bottom: 1px solid var(--line); }
.paper-head h1 { font-size: clamp(48px, 6vw, 76px); }
.paper-tabs button, .ftp-btn, .graph-controls button, .town-controls button {
  min-height: 44px;
  border-radius: 3px;
  transition: border-color 180ms ease-out, color 180ms ease-out, background 180ms ease-out;
}
.paper-tabs button[aria-selected=true] { border-color: var(--gold); color: var(--gold); }
.paper-body .prose { line-height: 1.82; }
.paper-sec h2 { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.02em; }
.paper-margin .ftp-card { max-width: none; }
.ftp-face, .tw, .ftp-ten, .ftp-rejected {
  border-radius: 4px;
  background: var(--surface);
  box-shadow: none;
}
.ftp-btn { font-family: var(--font-mono); font-size: 10px; }
.ftp-link { min-height: 44px; display: inline-flex; align-items: center; }
.ftp-id, .ftp-source code, .ftp-receipts code { font-family: var(--font-mono); }
button.ftp-marker { position: relative; }
button.ftp-marker::after { position: absolute; inset: -12px -8px; content: ""; }
input, select, textarea { color-scheme: dark; }
.muted, .ftp-empty { color: var(--text-muted); }

@media (max-width: 1120px) {
  .site-head { gap: 20px; }
  .site-author { display: none; }
  .home-hero { grid-template-columns: minmax(0, 1fr) minmax(390px, 0.88fr); gap: 40px; padding-inline: 32px; }
  .home h1 { font-size: clamp(64px, 7.4vw, 84px); }
  .observatory { padding: 26px; }
  .home-entry, .home-ledger { padding-inline: 32px; }
}

@media (max-width: 860px) {
  .site-head {
    grid-template-columns: 1fr auto;
    gap: 4px 16px;
    padding: 10px 20px 0;
  }
  .site-head nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .site-head nav::-webkit-scrollbar { display: none; }
  .site-head nav a { flex: none; padding-inline: 12px; }
  .site-head nav a:first-child { padding-left: 0; }
  .site-head nav a:first-child::after { left: 0; }
  .site-meta { grid-column: 2; grid-row: 1; }
  .home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 72px 28px 64px;
  }
  .home-copy { max-width: 700px; }
  .home h1 { max-width: 660px; font-size: clamp(68px, 12vw, 94px); }
  .home-lede { max-width: 640px; }
  .observatory { max-width: 640px; justify-self: start; margin-top: 16px; }
  .home-standard { grid-template-columns: 1fr; gap: 24px; padding: 64px 28px; }
  .home-standard .home-section-label { margin: 0; }
  .home-entry { padding: 72px 28px 64px; }
  .home-entry-head { grid-template-columns: 1fr; gap: 24px; }
  .home-entry-head p { justify-self: start; }
  .home-way { grid-template-columns: 100px 1fr auto; gap: 12px 20px; }
  .home-way > span:nth-child(3) { grid-column: 2 / 3; }
  .home-way-arrow { grid-column: 3; grid-row: 1 / 3; }
  .home-ledger { padding: 0 28px 72px; }
  .footer-inner { flex-direction: column; gap: 16px; }
  .site-foot p { text-align: left; }
  .page-pad { padding-inline: 28px; }
}

@media (max-width: 560px) {
  .site-head { padding-inline: 16px; }
  .site-wordmark { font-size: 20px; }
  .site-sigil { width: 28px; height: 28px; font-size: 18px; }
  .site-audit { font-size: 9px; }
  .site-head nav { gap: 0; }
  .site-head nav a { font-size: 11px; padding-inline: 10px; }
  .home-hero { gap: 44px; padding: 52px 20px 56px; }
  .home-kicker { max-width: 290px; margin-bottom: 24px; font-size: 9px; }
  .home h1 { font-size: clamp(58px, 17vw, 76px); line-height: 0.9; }
  .home-lede { margin-top: 28px; font-size: 16px; line-height: 1.7; }
  .home-actions { align-items: stretch; flex-direction: column; gap: 12px; margin-top: 32px; }
  .home-primary { justify-content: space-between; }
  .home-secondary { justify-content: center; border: 0; }
  .home-invitation { margin-top: 24px; }
  .observatory { padding: 24px 20px; }
  .observatory-top { font-size: 8px; }
  .observatory-count { gap: 18px; margin: 32px 0 28px; }
  .observatory-count strong { font-size: 62px; }
  .observatory-count > span { font-size: 11px; }
  .observatory-count small { font-size: 10px; }
  .observatory-chain { gap: 8px; }
  .chain-ring { width: 46px; height: 46px; font-size: 13px; }
  .chain-label { max-width: 72px; font-size: 7px; }
  .chain-line { margin-bottom: 25px; }
  .observatory-metrics { gap: 10px; }
  .observatory-metrics strong { font-size: 17px; }
  .observatory-metrics span { font-size: 7px; }
  .home-standard { padding: 56px 20px; }
  .home-standard h2, .home-entry h2 { font-size: 42px; }
  .home-standard > div > p { font-size: 15px; }
  .standard-notes { grid-template-columns: 1fr; gap: 24px; margin-top: 32px; }
  .home-entry { padding: 64px 20px 56px; }
  .home-ways { margin-top: 40px; }
  .home-way { grid-template-columns: 1fr auto; gap: 10px 16px; padding: 26px 0; }
  .home-way-kind { grid-column: 1; }
  .home-way-title { grid-column: 1; font-size: 32px; }
  .home-way > span:nth-child(3) { grid-column: 1; font-size: 12px; }
  .home-way-arrow { grid-column: 2; grid-row: 1 / 4; }
  .home-ledger { padding: 0 20px 64px; }
  .home-status { font-size: 19px; }
  .home-key { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 12px; }
  .home-key .ftp-marker { align-items: flex-start; }
  .home-key .ftp-marker-label { font-size: 8px; }
  .site-foot { padding: 28px 20px calc(28px + env(safe-area-inset-bottom)); }
  .page-pad { padding: 48px 20px 72px; }
  .paper-head h1 { font-size: 50px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}