/* ring.dgov.mn — editorial / archival design system,
   re-engineered around the as-is/to-be thesis. */

:root {
  --paper:        #F2EBDF;
  --paper-2:      #EBE3D2;
  --paper-rule:   #2A2218;
  --ink:          #0E0E14;
  --ink-2:        #2D2A24;
  --ink-mute:     #6F6657;
  --gold:         #A88B4A;
  --gold-deep:    #7E6831;
  --red:          #A33A2C;
  --red-deep:     #6E1D14;
  --green-deep:   #3F5C2E;
  --shadow:       0 1px 0 rgba(14,14,20,.06), 0 0 0 1px rgba(14,14,20,.04);

  --font-display: "PT Serif", "Source Serif Pro", Georgia, serif;
  --font-body:    "PT Sans", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --max-w:        78rem;
  --read-w:       42rem;
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.05  0 0 0 0 0.05  0 0 0 0 0.07  0 0 0 0.045 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>"),
    radial-gradient(ellipse at top, var(--paper) 0%, var(--paper-2) 100%);
  background-attachment: fixed;
}

a { color: var(--ink); text-decoration: underline; text-decoration-thickness: .5px; text-underline-offset: 3px; }
a:hover { color: var(--red-deep); text-decoration-thickness: 1.5px; }
::selection { background: var(--gold); color: var(--ink); }

.skiplink {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: .5rem 1rem;
}
.skiplink:focus { left: 1rem; top: 1rem; z-index: 100; }

/* ───── Masthead ───── */
.masthead { border-bottom: 2px solid var(--paper-rule); padding: 1.25rem 1.5rem 0; }
.masthead-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 2rem; padding-bottom: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: .9rem; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--red-deep); }
.brand-mark { width: 48px; height: 48px; color: var(--red); flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.875rem; letter-spacing: .12em; }
.brand-sub { font-family: var(--font-mono); font-size: .68rem; color: var(--ink-mute); letter-spacing: .12em; margin-top: .35rem; text-transform: uppercase; }
.masthead-nav { display: flex; gap: 2rem; }
.masthead-nav a {
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .14em; text-transform: uppercase;
  text-decoration: none; color: var(--ink-2); padding-bottom: .3rem;
  border-bottom: 1px dotted var(--ink-mute);
}
.masthead-nav a:hover { color: var(--red-deep); border-bottom-color: var(--red); border-bottom-style: solid; }

.masthead-rule {
  height: 5px;
  background: linear-gradient(to bottom,
    var(--paper-rule) 0, var(--paper-rule) 1px,
    transparent 1px, transparent 3px,
    var(--paper-rule) 3px, var(--paper-rule) 4px,
    transparent 4px);
  max-width: var(--max-w); margin: 0 auto;
}
.masthead-meta {
  max-width: var(--max-w); margin: 0 auto;
  padding: .55rem 0 1.1rem;
  display: flex; gap: 2.4rem;
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .12em; color: var(--ink-mute); text-transform: uppercase;
}
.meta-cell { white-space: nowrap; }

/* ───── Page ───── */
.page { max-width: var(--max-w); margin: 0 auto; padding: 3.5rem 1.5rem 5rem; }

.rule { border: 0; border-top: 1px solid var(--paper-rule); margin: 4rem 0; position: relative; }
.rule::before {
  content: "⁂";
  position: absolute; top: -.95rem; left: 50%; transform: translateX(-50%);
  background: var(--paper); padding: 0 1rem; color: var(--gold-deep);
  font-size: 1.05rem; letter-spacing: .25em;
}
.rule--inset { margin: 2.25rem 0 2.5rem; }
.rule--inset::before { display: none; }

/* ───── Opener ───── */
.opener { padding-top: 1rem; animation: fade-up .8s ease .05s both; }
.opener-eyebrow {
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--red-deep); margin: 0 0 1.25rem;
}
.opener-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(3rem, 8.5vw, 7rem);
  line-height: .95; letter-spacing: -.015em;
  margin: 0; color: var(--ink);
}
.opener-title em { font-style: italic; color: var(--red-deep); font-weight: 400; }
.opener-accent {
  position: relative; white-space: nowrap;
  background-image: linear-gradient(to bottom, transparent 60%, color-mix(in srgb, var(--gold) 60%, transparent) 60%, color-mix(in srgb, var(--gold) 60%, transparent) 92%, transparent 92%);
  padding: 0 .15em;
}
.opener-grid {
  display: grid; grid-template-columns: 2fr 1fr; gap: 4rem;
  margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--paper-rule);
}
.opener-lede p {
  font-family: var(--font-display); font-size: 1.18rem; line-height: 1.65;
  margin: 0 0 1rem; color: var(--ink-2);
}
.opener-lede p:first-child::first-line { font-variant: small-caps; letter-spacing: .04em; }
.opener-aside { font-family: var(--font-mono); font-size: .82rem; }
.aside-table { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--paper-rule); }
.aside-table > div {
  display: grid; grid-template-columns: 1fr auto; gap: 1.5rem;
  padding: .7rem 0; border-bottom: 1px dotted var(--ink-mute); align-items: baseline;
}
.aside-table dt { color: var(--ink-mute); text-transform: uppercase; letter-spacing: .14em; font-size: .7rem; }
.aside-table dd { margin: 0; text-align: right; color: var(--ink); }

/* ───── Headline banner (totals) ───── */
.banner {
  margin-top: 3.5rem;
  border-top: 1px solid var(--paper-rule);
  border-bottom: 1px solid var(--paper-rule);
  padding: 2rem 0 2.25rem;
}
.banner-eyebrow {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--ink-mute); margin: 0 0 1.25rem;
}
.banner-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--paper-rule); border-left: 1px solid var(--paper-rule); border-right: 1px solid var(--paper-rule);
}
.banner-cell {
  background: var(--paper); padding: 1.5rem 1.25rem;
  display: flex; flex-direction: column; gap: .35rem;
}
.banner-num {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  line-height: 1; color: var(--ink); letter-spacing: -.02em;
  display: flex; align-items: baseline; gap: .6rem;
}
.banner-num .banner-arrow {
  font-family: var(--font-mono); font-weight: 400;
  font-size: .55em; color: var(--gold-deep);
  letter-spacing: 0; padding: 0 .1em;
}
.banner-label {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute);
}

/* ───── Register list ───── */
.register-head {
  margin-bottom: 2.5rem;
  display: flex; align-items: baseline; justify-content: space-between;
}
.register-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: 2rem; letter-spacing: -.005em; margin: 0;
}
.register-sub {
  font-family: var(--font-mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .14em;
  color: var(--ink-mute); margin: 0;
}
.register-list { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--paper-rule); }
.entry { border-bottom: 1px solid var(--paper-rule); }
.entry-link {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 2rem;
  padding: 2rem 0;
  text-decoration: none; color: var(--ink);
  position: relative;
  transition: padding .35s ease;
  align-items: start;
}
.entry-link:hover { padding-left: .5rem; padding-right: .5rem; }
.entry-link::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--paper-2) 50%, transparent);
  opacity: 0; transition: opacity .35s ease; z-index: -1;
}
.entry-link:hover::before { opacity: .7; }
.entry-num {
  font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: 3.25rem; line-height: 1;
  color: var(--gold-deep); letter-spacing: -.04em;
  align-self: start; padding-top: .15em;
}
.entry-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.55rem; line-height: 1.2; margin: 0 0 .55rem; color: var(--ink);
}
.entry-summary {
  font-family: var(--font-display); font-size: 1.04rem;
  color: var(--ink-2); margin: 0 0 .9rem; max-width: var(--read-w);
}
.entry-meta {
  display: flex; align-items: center; gap: .9rem;
  font-family: var(--font-mono); font-size: .74rem;
  letter-spacing: .1em; color: var(--ink-mute); text-transform: uppercase;
}
.meta-tag { border: 1px solid var(--ink-mute); padding: .15rem .55rem; border-radius: 999px; }
.meta-dot { color: var(--gold-deep); }

.entry-deltas {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 1.4rem 1.6rem;
  align-items: end;
  padding-top: .25rem;
  font-family: var(--font-mono);
}
.delta { display: flex; flex-direction: column; align-items: flex-end; gap: .15rem; }
.delta-num {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.85rem; line-height: 1;
  color: var(--green-deep); letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.delta-label {
  font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-mute);
}
.delta--pct .delta-num { color: var(--red-deep); }

.empty {
  padding: 4rem 1.5rem; text-align: center;
  border-top: 1px solid var(--paper-rule); border-bottom: 1px solid var(--paper-rule);
}
.empty-title { font-family: var(--font-display); font-style: italic; font-size: 1.4rem; color: var(--ink-2); margin: 0 0 .5rem; }
.empty-sub { color: var(--ink-mute); margin: 0; font-family: var(--font-mono); font-size: .85rem; }

/* ───── Legend ───── */
.legend { margin-top: 5rem; }
.legend-title {
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-mute); margin: 0 0 1.5rem; text-align: center;
}
.legend-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--paper-rule); border: 1px solid var(--paper-rule);
}
.legend-item { background: var(--paper); padding: 1.5rem 1.25rem; }
.legend-mark {
  display: inline-block; font-family: var(--font-display);
  font-size: 1.6rem; color: var(--red); margin-bottom: .6rem; line-height: 1;
}
.legend-item h3 { font-family: var(--font-display); font-size: 1.08rem; margin: 0 0 .3rem; font-weight: 700; }
.legend-item p { margin: 0; font-size: .9rem; color: var(--ink-2); line-height: 1.45; }

/* ───── Article (process detail) ───── */
.article { max-width: var(--max-w); margin: 0 auto; animation: fade-up .7s ease both; }
.article-head { margin-bottom: 2rem; }
.article-eyebrow {
  font-family: var(--font-mono); font-size: .76rem;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--red-deep); margin: 0 0 1rem;
}
.article-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.25rem, 5.2vw, 4rem);
  line-height: 1.05; letter-spacing: -.01em;
  margin: 0 0 1.25rem; max-width: 22ch;
}
.article-lede {
  font-family: var(--font-display); font-size: 1.22rem;
  font-style: italic; line-height: 1.55; color: var(--ink-2);
  max-width: var(--read-w); margin: 0 0 1.5rem;
}
.article-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0; margin: 1.5rem 0 0; border-top: 1px solid var(--paper-rule);
}
.article-meta > div { padding: .85rem 1.25rem .85rem 0; border-bottom: 1px dotted var(--ink-mute); }
.article-meta dt { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .15em; color: var(--ink-mute); text-transform: uppercase; margin-bottom: .25rem; }
.article-meta dd { margin: 0; font-family: var(--font-display); font-size: 1rem; color: var(--ink); }
.article-meta dd a + a { margin-left: .9rem; }

/* ───── Ledger (per-process metrics) ───── */
.ledger {
  margin: 3rem 0 2.5rem;
  border-top: 1px solid var(--paper-rule);
  border-bottom: 1px solid var(--paper-rule);
  padding: 2.25rem 0 2.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: end;
}
.ledger-title {
  grid-column: 1 / -1;
  font-family: var(--font-mono); font-size: .76rem;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-mute); margin: 0 0 1.5rem;
}
.ledger-grid { display: grid; gap: .15rem; }
.ledger-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto auto;
  gap: 1.5rem;
  align-items: baseline;
  font-family: var(--font-display);
  padding: .55rem 0;
  border-bottom: 1px dotted var(--ink-mute);
}
.ledger-row:last-child { border-bottom: none; }
.ledger-label {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute);
}
.ledger-asis, .ledger-tobe {
  font-weight: 700; font-size: 1.4rem; min-width: 4ch; text-align: right;
  font-variant-numeric: tabular-nums;
}
.ledger-asis { color: var(--ink-2); }
.ledger-tobe { color: var(--green-deep); }
.ledger-arrow { font-family: var(--font-mono); color: var(--gold-deep); font-size: 1.05rem; }
.ledger-delta {
  font-family: var(--font-mono); font-size: .85rem;
  color: var(--red-deep); min-width: 6ch; text-align: right;
  font-weight: 500;
}
.ledger-delta--null { color: var(--ink-mute); font-weight: 400; }

.ledger-headline { text-align: right; }
.ledger-headline-num {
  display: block; font-family: var(--font-display);
  font-style: italic; font-weight: 700;
  font-size: clamp(4rem, 7vw, 6rem);
  line-height: .95; color: var(--red-deep);
  letter-spacing: -.04em;
}
.ledger-headline-text {
  display: block; font-family: var(--font-mono);
  font-size: .76rem; letter-spacing: .18em;
  color: var(--ink-mute); text-transform: uppercase;
  margin-top: .5rem;
}

/* ───── Narrative (problem + innovation) ───── */
.narrative {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  margin: 3rem 0 1rem;
}
.narrative-cell { padding: 1.75rem 0; border-top: 2px solid var(--paper-rule); }
.narrative-cell:first-child { border-top-color: var(--red); }
.narrative-cell:last-child  { border-top-color: var(--green-deep); }
.narrative-h {
  font-family: var(--font-mono); font-size: .76rem;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--ink-mute); margin: 0 0 .75rem;
}
.narrative-cell p {
  font-family: var(--font-display); font-size: 1.1rem;
  line-height: 1.65; color: var(--ink-2);
  margin: 0; max-width: 36ch;
}

/* ───── Diagrams (paired) ───── */
.diagrams { display: grid; gap: 2.5rem; margin: 1.5rem 0 0; }
.diagram-frame {
  background: var(--paper-2);
  border: 1px solid var(--paper-rule);
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 12px 30px -12px rgba(14,14,20,.18);
}
.diagram-chrome {
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 1rem; align-items: center;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--paper-rule);
  background: var(--paper);
}
.diagram-tag {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .18em; text-transform: uppercase;
  padding: .25rem .65rem; border: 1px solid currentColor;
}
.diagram-tag--asis { color: var(--red-deep); }
.diagram-tag--tobe { color: var(--green-deep); }
.diagram-chrome-label {
  text-align: center; font-family: var(--font-mono);
  font-size: .76rem; color: var(--ink-mute); letter-spacing: .04em;
}
.diagram-meta { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-mute); }
.diagram-canvas {
  width: 100%; height: clamp(420px, 60vh, 640px);
  background:
    linear-gradient(to right, rgba(14,14,20,.04) 1px, transparent 1px) 0 0/2rem 2rem,
    linear-gradient(to bottom, rgba(14,14,20,.04) 1px, transparent 1px) 0 0/2rem 2rem,
    var(--paper);
  position: relative;
}
.diagram-loading,
.diagram-error {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--ink-mute); font-family: var(--font-mono); font-size: .85rem;
}
.diagram-error { color: var(--red-deep); }
.diagram-foot {
  display: flex; justify-content: space-between;
  padding: .65rem 1rem; border-top: 1px solid var(--paper-rule);
  background: var(--paper);
  font-family: var(--font-mono); font-size: .68rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute);
}

/* ───── bpmn-js theming ───── */
.diagram-canvas .djs-element .djs-visual > :is(rect, circle, polygon, path) {
  stroke: var(--ink) !important;
  stroke-width: 1.5px !important;
}
.diagram-canvas .djs-element .djs-visual > rect[fill]:not([fill="none"]) {
  fill: var(--paper) !important;
}
.diagram-canvas .djs-element .djs-label {
  font-family: var(--font-display) !important;
  fill: var(--ink) !important;
}
.diagram-canvas .djs-connection .djs-visual > path {
  stroke: var(--ink-2) !important; stroke-width: 1.5px !important;
}
.diagram-canvas .djs-connection marker path {
  fill: var(--ink-2) !important; stroke: var(--ink-2) !important;
}

/* ───── History ───── */
.history { margin-top: 4rem; }
.history-title {
  font-family: var(--font-mono); font-size: .78rem;
  text-transform: uppercase; letter-spacing: .2em;
  color: var(--ink-mute); margin: 0 0 1rem;
  border-bottom: 1px solid var(--paper-rule); padding-bottom: .6rem;
}
.history-list { list-style: none; margin: 0; padding: 0; }
.history-row {
  display: grid;
  grid-template-columns: 5rem 4rem 7rem 1fr auto;
  gap: 1.25rem;
  padding: .75rem 0;
  border-bottom: 1px dotted var(--ink-mute);
  align-items: baseline; font-size: .9rem;
}
.history-kind {
  font-family: var(--font-mono); font-size: .68rem;
  letter-spacing: .14em; text-transform: uppercase;
  border: 1px solid currentColor; padding: .1rem .45rem; border-radius: 2px;
  text-align: center;
}
.history-kind--asis { color: var(--red-deep); }
.history-kind--tobe { color: var(--green-deep); }
.history-ver { font-family: var(--font-mono); color: var(--ink-2); }
.history-date { font-family: var(--font-mono); color: var(--ink-mute); }
.history-note { font-family: var(--font-display); color: var(--ink-2); }
.history-author { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-mute); }

/* ───── About prose ───── */
.article--prose .prose {
  max-width: var(--read-w); margin: 0;
  font-family: var(--font-display); font-size: 1.12rem;
  line-height: 1.7; color: var(--ink-2);
}
.article--prose .prose h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.5rem; margin: 2.5rem 0 .8rem; color: var(--ink);
}
.article--prose .prose p { margin: 0 0 1.2rem; }
.article--prose .prose ul {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--paper-rule);
}
.article--prose .prose ul li {
  padding: .55rem 0; border-bottom: 1px dotted var(--ink-mute);
  font-family: var(--font-display); font-size: 1rem;
  display: grid; grid-template-columns: 14rem 1fr; gap: 1rem;
}
.article--prose .prose ul li code {
  font-family: var(--font-mono); font-size: .85rem;
  color: var(--red-deep); background: var(--paper-2);
  padding: .1rem .4rem;
}
.dropcap::first-letter {
  font-family: var(--font-display); font-weight: 700;
  font-size: 4.5rem; line-height: .85;
  float: left; margin: .15em .15em -.05em 0; color: var(--red-deep);
}

/* ───── 404 ───── */
.notfound { text-align: center; padding: 6rem 1rem; max-width: 38rem; margin: 0 auto; }
.notfound-num { font-family: var(--font-display); font-style: italic; font-size: 9rem; line-height: 1; color: var(--gold-deep); margin: 0; }
.notfound-title { font-family: var(--font-display); font-size: 2rem; margin: 1rem 0; }
.notfound-sub { color: var(--ink-mute); margin-bottom: 2rem; }
.notfound-back { font-family: var(--font-mono); font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; }

/* ───── Colophon ───── */
.colophon { border-top: 2px solid var(--paper-rule); padding: 2.5rem 1.5rem; margin-top: 4rem; }
.colophon-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
}
.colophon-line { margin: 0; font-family: var(--font-display); font-style: italic; color: var(--ink-2); display: flex; align-items: baseline; gap: .9rem; }
.colophon-mark { font-style: normal; color: var(--gold-deep); font-size: 1.1rem; }
.colophon-meta { margin: 0; display: flex; gap: .65rem; font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute); }

/* ───── Animations ───── */
@keyframes fade-up { from { opacity: 0; transform: translateY(.75rem); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ───── Responsive ───── */
@media (max-width: 1024px) {
  .entry-link { grid-template-columns: 4.5rem 1fr; gap: 1.5rem; }
  .entry-deltas { grid-column: 1 / -1; grid-template-columns: repeat(4, 1fr); justify-items: start; padding-top: 1rem; border-top: 1px dotted var(--ink-mute); }
  .delta { align-items: flex-start; }
  .ledger { grid-template-columns: 1fr; gap: 1.5rem; }
  .ledger-headline { text-align: left; }
}
@media (max-width: 900px) {
  .masthead-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .masthead-meta { gap: 1.25rem; flex-wrap: wrap; }
  .opener-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .opener-aside { border-top: 1px solid var(--paper-rule); padding-top: 1.5rem; }
  .legend-grid { grid-template-columns: repeat(2, 1fr); }
  .banner-grid { grid-template-columns: 1fr; }
  .entry-num { font-size: 2.5rem; }
  .entry-title { font-size: 1.3rem; }
  .narrative { grid-template-columns: 1fr; gap: 1.5rem; }
  .colophon-inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .history-row { grid-template-columns: 4rem 3rem 6rem 1fr; }
  .history-author { grid-column: 2 / -1; }
}
@media (max-width: 560px) {
  .opener-title { font-size: 2.7rem; }
  .article-title { font-size: 2rem; }
  .legend-grid { grid-template-columns: 1fr; }
  .diagram-canvas { height: 60vh; }
  .ledger-row { grid-template-columns: 1fr auto auto; }
  .ledger-arrow, .ledger-delta { display: none; }
  .article--prose .prose ul li { grid-template-columns: 1fr; }
}