/* Page sections, top to bottom. Class names follow the section ids in index.html. */

/* ================= Header ================= */
.top {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: var(--room); color: var(--paper); border-bottom: 1px solid var(--rule-dark);
}
.top .wrap { display: flex; align-items: center; gap: var(--s6); min-height: 68px; }
.mark { display: inline-flex; align-items: baseline; gap: var(--s3); text-decoration: none; margin-right: auto; }
.mark__d { color: var(--brass); font-size: 1.1rem; transform: translateY(-1px); }
.mark__n { font: 500 1.4rem/1 var(--f-display); letter-spacing: .005em; }
.mark__s { font: 600 var(--fs-label)/1 var(--f-ui); letter-spacing: .16em; text-transform: uppercase; color: var(--paper-dim); }
.nav { display: flex; gap: var(--s6); }
.nav a { font: 500 .9rem/1 var(--f-ui); text-decoration: none; color: var(--paper-dim); padding: var(--s4) 0; border-bottom: 1px solid transparent; transition: color var(--t-fast) ease, border-color var(--t-fast) ease; }
.nav a:hover { color: var(--paper); border-color: var(--brass); }
.top .btn { min-height: 42px; padding: 0 var(--s5); font-size: .875rem; }
.mark { min-height: 44px; align-items: center; }
.top .btn { min-height: 44px; }
.t-short { display: none; }
.nav .nav__cta { display: none; }
.nav-toggle {
  display: none; flex: none; position: relative; width: 44px; height: 44px; padding: 0;
  background: transparent; color: var(--paper); border: 1px solid var(--rule-dark); border-radius: var(--radius);
}
.nav-toggle:hover { border-color: var(--brass); }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  position: absolute; left: 11px; right: 11px; height: 2px; background: currentColor; transition: transform var(--t-base) var(--ease-out), opacity var(--t-fast) ease;
}
.nav-toggle span { top: 21px; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; left: 0; right: 0; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 960px) {
  .top .wrap { gap: var(--s3); }
  .mark__s { display: none; }
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--room); border-bottom: 1px solid var(--rule-dark);
    padding: var(--s2) max(clamp(16px, 4vw, 40px), env(safe-area-inset-right, 0px)) var(--s5) max(clamp(16px, 4vw, 40px), env(safe-area-inset-left, 0px));
    max-height: calc(100dvh - 68px); overflow-y: auto;
  }
  .nav.open { display: flex; }
  .nav a { display: flex; align-items: center; min-height: 52px; padding: var(--s3) 0; font-size: 1.0625rem; border-bottom: 1px solid var(--rule-dark); }
  .nav a:hover { border-color: var(--rule-dark); }
  .nav a.nav__cta { display: inline-flex; justify-content: center; margin-top: var(--s4); color: var(--ink); border: 1px solid var(--brass); font-size: .9rem; }
  .nav a.nav__cta:hover { color: var(--ink); }
}
@media (max-width: 520px) { .t-long { display: none; } .t-short { display: inline; } .top .btn--head { padding: 0 var(--s4); } }
@media (max-width: 400px) { .top .btn--head { display: none; } }

section[id] { scroll-margin-top: 72px; }

/* ================= Hero ================= */
.hero { overflow: hidden; padding-top: clamp(40px, 6vw, 88px); padding-bottom: clamp(56px, 8vw, 112px); }
.rosette {
  position: absolute; z-index: 0; right: -22%; top: -14%;
  width: min(1180px, 120vw); aspect-ratio: 1; opacity: .75; pointer-events: none;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 38%, transparent 70%);
          mask-image: radial-gradient(circle at 50% 50%, #000 38%, transparent 70%);
  animation: turn 420s linear infinite;
}
@keyframes turn { to { transform: rotate(360deg); } }

.hero__grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(var(--s6), 5vw, var(--s8)); align-items: start;
}
.hero__copy { padding-top: clamp(0px, 2vw, 24px); }
.hero__copy .label { display: flex; flex-wrap: wrap; gap: var(--s1) var(--s4); margin-bottom: var(--s6); }
.hero__copy .label i { font-style: normal; color: var(--rule-dark); }

h1.hero__h {
  font-family: var(--f-display); font-weight: 450; font-variation-settings: "opsz" 72;
  font-size: clamp(3rem, 6.4vw, 6.1rem); line-height: .98; letter-spacing: -.028em;
}
.ln { display: block; overflow: hidden; padding-bottom: .08em; margin-bottom: -.08em; }
.ln > span { display: block; animation: rise var(--t-slow) var(--ease-out) both; animation-delay: calc(var(--i, 0) * 100ms + 100ms); }
@keyframes rise { from { transform: translateY(105%); } to { transform: none; } }

.auth { position: relative; display: inline-block; font-style: italic; font-weight: 400; color: var(--brass-soft); }
.auth::after {
  content: ""; position: absolute; left: 0; right: .04em; bottom: -.04em; height: 6px;
  background:
    linear-gradient(var(--brass), var(--brass)) top / 100% 3px no-repeat,
    linear-gradient(var(--brass), var(--brass)) bottom / 100% 1px no-repeat;
  transform-origin: left; animation: draw 900ms var(--ease-out) 900ms both;
}
@keyframes draw { from { transform: scaleX(0); } to { transform: none; } }

.hero__lead { margin-top: var(--s6); color: var(--paper); max-width: 40ch; }
.hero__cta { margin-top: var(--s7); display: flex; flex-wrap: wrap; gap: var(--s4); }
.hero__fine { margin-top: var(--s6); font: 400 .8125rem/1.6 var(--f-mono); color: var(--paper-dim); letter-spacing: .02em; }

/* The proof: one answer drawn the way the Library draws it. */
.answer {
  position: relative; background: var(--paper); color: var(--ink); border-radius: var(--radius);
  box-shadow: 10px 10px 0 var(--rule-dark);
  margin-top: clamp(0px, 4vw, 56px);
}
.answer__bar {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s1) var(--s4);
  padding: var(--s4) var(--s5) var(--s3); border-bottom: 3px double var(--ink);
}
.answer__bar .label { color: var(--ink-dim); }
.answer__bar .mono { font-size: .78rem; color: var(--ink-dim); }
.answer__q { padding: var(--s5) var(--s5) 0; }
.answer__q .label { color: var(--ink-dim); }
.answer__q p { margin-top: var(--s2); font: italic 400 1.2rem/1.4 var(--f-display); }
.answer__body { padding: var(--s5); display: grid; gap: var(--s5); font: 400 1.125rem/1.6 var(--f-display); }
.answer__body p { max-width: 52ch; }
.answer__aside { margin: 0 var(--s5); padding-top: var(--s4); border-top: 1px solid var(--rule); font-size: var(--fs-small); color: var(--ink-dim); line-height: 1.5; }
.answer .receipt { padding: var(--s4) var(--s5) var(--s5); color: var(--ink-dim); }
.answer .receipt b { color: var(--ink); }

/* sequence: the marks settle in after the text is already readable */
.answer .cite { animation: settle 520ms var(--ease-out) both; }
.answer .s1 .cite:nth-of-type(1) { animation-delay: 1.1s; }
.answer .s1 .cite:nth-of-type(2) { animation-delay: 1.3s; }
.answer .tag { animation: settle 520ms var(--ease-out) 1.9s both; }
.answer .is-inference { animation: ruledown 600ms var(--ease-out) 1.8s both; }
@keyframes settle { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes ruledown { from { border-left-color: transparent; } to { border-left-color: var(--inference); } }
.answer .silent { position: relative; border-left: 0; }
.answer .silent::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--silent);
  transform-origin: top; animation: growy 700ms var(--ease-out) 2.5s both;
}
@keyframes growy { from { transform: scaleY(0); } to { transform: none; } }

@media (max-width: 1000px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .answer { margin-top: 0; }
  .rosette { right: -45%; top: -6%; opacity: .55; }
}
@media (max-width: 480px) {
  .answer { box-shadow: 6px 6px 0 var(--rule-dark); }
  .answer__bar, .answer__q, .answer__body, .answer .receipt { padding-inline: var(--s4); }
  .answer__aside { margin-inline: var(--s4); }
}

/* ================= Charter ================= */
.charter__head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: var(--s7); align-items: end; margin-bottom: var(--s7); }
.charter__head p { color: var(--ink-dim); max-width: 44ch; }
.charter .dbl { color: var(--ink); }

.rule-row {
  display: grid; grid-template-columns: minmax(84px, 1fr) minmax(0, 5fr) minmax(0, 5fr);
  gap: var(--s6); padding-block: var(--s7); border-bottom: 1px solid var(--ink);
}
.rule-row:last-child { border-bottom: 3px double var(--ink); }
.rule-row .num { font: 400 clamp(2.6rem, 5vw, 4.6rem)/.95 var(--f-display); color: var(--brass-ink); letter-spacing: -.02em; }
.rule-row h3 { font: 500 clamp(2rem, 3.4vw, 2.9rem)/1.02 var(--f-display); letter-spacing: -.015em; }
.rule-row h3 + p { margin-top: var(--s4); max-width: 42ch; color: var(--ink-dim); }
.specimen { background: var(--paper-2); border-radius: var(--radius); padding: var(--s5); align-self: start; display: grid; gap: var(--s4); }
.specimen .label { color: var(--ink-dim); }
.specimen p.sample { font: 400 1.1rem/1.55 var(--f-display); }
.specimen .src {
  display: flex; flex-wrap: wrap; gap: var(--s2) var(--s3); align-items: baseline;
  padding-top: var(--s3); border-top: 1px solid var(--rule); font: 400 .8rem/1.5 var(--f-mono); color: var(--ink-dim);
}
@media (max-width: 900px) {
  .charter__head { grid-template-columns: minmax(0, 1fr); gap: var(--s5); }
  .rule-row { grid-template-columns: minmax(0, 1fr); gap: var(--s4); }
}

/* ================= Architecture ================= */
.arch { background-image: repeating-linear-gradient(135deg, transparent 0 7px, rgba(217, 192, 138, .045) 7px 8px); }
.arch__grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: var(--s7); align-items: end; margin-bottom: var(--s8); }
.arch__grid p { color: var(--paper-dim); max-width: 46ch; }
.arch__grid p b { color: var(--paper); font-weight: 500; }
.diagram { overflow-x: auto; border-top: 3px double var(--rule-dark); padding-top: var(--s7); }
.diagram svg { width: 100%; min-width: 720px; height: auto; }
.diagram text { font-family: var(--f-ui); }
.dg-line { stroke: var(--paper-dim); stroke-width: 1; fill: none; }
.dg-fill { fill: var(--room-2); stroke: var(--rule-dark); }
.dg-brass { stroke: var(--brass); stroke-width: 1.5; fill: none; }
.dg-t { fill: var(--paper); font-size: 15px; }
.dg-s { fill: var(--paper-dim); font-size: 12px; }
.dg-k { fill: var(--brass-soft); font-size: 11px; font-weight: 600; letter-spacing: .14em; }
.dg-m { fill: var(--paper-dim); font-family: var(--f-mono); font-size: 11px; }
.flow { display: none; margin-top: var(--s5); padding-top: var(--s5); border-top: 3px double var(--rule-dark); gap: 0; }
.flow li { border: 1px solid var(--rule-dark); background: var(--room-2); padding: var(--s4) var(--s5); }
.flow b { display: block; margin-bottom: var(--s2); font: 600 var(--fs-label)/1.2 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--brass-soft); }
.flow li > span { font-size: var(--fs-body); color: var(--paper); }
.flow .flow__go { border: 0; background: none; margin-left: var(--s5); padding: var(--s3) 0 var(--s3) var(--s5); border-left: 2px solid var(--brass); }
.flow .flow__go span { font: 400 .8125rem/1.4 var(--f-mono); color: var(--paper-dim); }
@media (max-width: 1000px) { .diagram { display: none; } .flow { display: grid; max-width: 640px; } }
.arch__note { margin-top: var(--s5); font: 400 .8125rem/1.6 var(--f-mono); color: var(--paper-dim); }
@media (max-width: 900px) { .arch__grid { grid-template-columns: minmax(0, 1fr); gap: var(--s5); margin-bottom: var(--s7); } }

/* ================= Custody ================= */
.custody__grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(var(--s6), 6vw, var(--s9)); align-items: center; }
.custody__facts { margin-top: var(--s7); border-top: 3px double var(--ink); }
.custody__facts div { display: grid; grid-template-columns: minmax(0, 11rem) minmax(0, 1fr); gap: var(--s4); padding-block: var(--s4); border-bottom: 1px solid var(--rule); }
.custody__facts dt { font: 500 .78rem/1.7 var(--f-mono); color: var(--ink-dim); }
.custody__facts dd { font: 400 1.2rem/1.4 var(--f-display); }
.custody p.lead { margin-top: var(--s5); color: var(--ink); }
.plate { background: var(--paper); border-radius: var(--radius); padding: var(--s5); box-shadow: 10px 10px 0 var(--rule); }
.plate svg { width: 100%; height: auto; }
.plate .p-line { stroke: var(--ink); fill: none; stroke-width: 1.4; }
.plate .p-hatch { fill: url(#hatch); stroke: var(--ink); stroke-width: 1.4; }
.plate .p-brass { stroke: var(--brass-ink); fill: none; stroke-width: 1.6; }
.plate .p-t { font-family: var(--f-mono); font-size: 17px; fill: var(--ink-dim); }
.plate figcaption { margin-top: var(--s3); font: 400 .78rem/1.6 var(--f-mono); color: var(--ink-dim); }
@media (max-width: 900px) {
  .custody__grid { grid-template-columns: minmax(0, 1fr); }
  .custody__facts div { grid-template-columns: minmax(0, 1fr); gap: 0; }
}

/* ================= Holdings ================= */
.holdings__head { max-width: 60ch; margin-bottom: var(--s7); }
.holdings__head p { margin-top: var(--s4); color: var(--ink-dim); }
.tablewrap { overflow-x: auto; border-top: 3px double var(--ink); border-bottom: 3px double var(--ink); }
table.ledger { width: 100%; min-width: 680px; border-collapse: collapse; }
.ledger th { text-align: left; padding: var(--s4) var(--s4) var(--s3) 0; font: 600 var(--fs-label)/1.2 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); border-bottom: 1px solid var(--ink); }
.ledger td { padding: var(--s4) var(--s4) var(--s4) 0; vertical-align: baseline; border-bottom: 1px solid var(--rule); }
.ledger tr:last-child td { border-bottom: 0; }
.ledger td:first-child { font: 400 1.25rem/1.3 var(--f-display); width: 38%; }
.ledger td:nth-child(2) { font: 400 .85rem/1.5 var(--f-mono); width: 24%; }
.ledger td:last-child { font-size: var(--fs-small); color: var(--ink-dim); padding-right: 0; }
.ledger tbody tr { transition: background var(--t-fast) ease; }
.ledger tbody tr:hover { background: var(--paper-2); }
.holdings__foot { margin-top: var(--s5); font-size: var(--fs-small); color: var(--ink-dim); max-width: 64ch; }

/* ================= Primary colour switcher (design preview control, not part of the page) ================= */
.dock {
  position: fixed; z-index: 80;
  left: max(16px, env(safe-area-inset-left, 0px)); bottom: max(16px, env(safe-area-inset-bottom, 0px));
  display: flex; align-items: center; gap: var(--s3); padding: var(--s2) var(--s3);
  background: var(--paper); color: var(--ink); border: 1px solid var(--ink); border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--rule);
}
.dock__l { font: 600 var(--fs-label)/1 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); }
.dock__sw { display: flex; gap: var(--s2); }
.pal { width: 30px; height: 30px; padding: 0; border: 1px solid var(--ink); border-radius: 2px; background: var(--sw); position: relative; }
.pal::after { content: ""; position: absolute; left: 4px; right: 4px; bottom: 4px; height: 4px; background: var(--brass); }
.pal[aria-pressed="true"] { outline: 2px solid var(--brass); outline-offset: 3px; }
.pal:hover { transform: translateY(-2px); }
.dock__n { font: 400 .75rem/1 var(--f-mono); color: var(--ink-dim); min-width: 8.5em; }
@media (pointer: coarse) { .pal { width: 40px; height: 40px; } }
@media (max-width: 900px) { .closing { padding-bottom: calc(var(--s9) + 56px); } }
@media (max-width: 520px) { .dock__n { display: none; } }

/* ================= Closing ================= */
.closing { overflow: hidden; }
.closing__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(var(--s6), 6vw, var(--s9)); align-items: end; }
.closing h2.display { font-size: clamp(2.6rem, 5.6vw, 5rem); line-height: 1; }
.closing h2 .auth { color: var(--brass-soft); }
.closing h2 .auth::after { animation: none; }
form.request { display: grid; gap: var(--s5); }
.field { display: grid; gap: var(--s1); }
.field label { font: 600 var(--fs-label)/1.2 var(--f-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--brass-soft); }
.field input {
  min-height: 48px; background: transparent; color: var(--paper); border: 0; border-bottom: 1px solid var(--paper-dim);
  border-radius: 0; font: 400 1.25rem/1.2 var(--f-display); padding: var(--s2) 0; outline: 0;
  transition: border-color var(--t-fast) ease, box-shadow var(--t-fast) ease;
}
.field input:focus { border-bottom-color: var(--brass); box-shadow: 0 1px 0 var(--brass); }
.field input::placeholder { color: var(--paper-dim); opacity: .7; }
.request .btn { justify-self: start; margin-top: var(--s2); }
.request__status { min-height: 1.6em; font: 400 .8rem/1.6 var(--f-mono); color: var(--paper-dim); }

.foot { margin-top: var(--s9); color: var(--rule-dark); }
.foot__in { display: flex; flex-wrap: wrap; gap: var(--s3) var(--s6); justify-content: space-between; padding-top: var(--s5); color: var(--paper-dim); font-size: var(--fs-small); }
.foot__in b { color: var(--paper); font-weight: 500; font-family: var(--f-display); font-size: 1.15rem; }
.foot__in .mono { font-size: .75rem; }
.foot__in p { max-width: 58ch; }
@media (max-width: 900px) { .closing__grid { grid-template-columns: minmax(0, 1fr); } .foot { margin-top: var(--s8); } }

/* The headline is the brief's own sentence, so it is longer than the earlier three-line draft. */
h1.hero__h--long { font-size: clamp(2.6rem, 5vw, 4.8rem); }
.arch__lead { margin-top: var(--s7); max-width: 62ch; color: var(--paper); }
table.ledger { min-width: 0; }

/* The hidden attribute wins over any display rule (the request form's off-screen honeypot field). */
[hidden] { display: none !important; }