/* ═══════════════════════════════════════════════════════════════════
   STRATUM — landing plate
   Pinned dark survey-poster (at-004: does NOT follow the circadian
   engine). Palette keyed to the lithograph strata language; strata
   fills live in strata-draw.js — tokens here mirror them for legend
   and accents. AA-checked against --plate.
   ═══════════════════════════════════════════════════════════════════ */
:root {
  --plate: #0c0e10;
  --plate-well: #121416;
  --frame: #434B54;
  --frame-soft: #23272C;
  --ink: #F0F2F5;
  --ink-muted: #9BA3AF;
  --ink-faint: #6E7681;      /* faintest text still AA-large on --plate */
  --red: #E74C3C;
  --seam: #58D68D;
  --t-axiomatic: #8C3B2E;
  --t-verified: #2E5D4B;
  --t-pending: #B08A2E;
  --t-narrative: #3E5A72;
  --t-foreclosure: #8E4A6B;
  --display: "Fraunces", Georgia, serif;
  --body: "Archivo", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: #000; }
body.plate {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background:
    radial-gradient(120% 90% at 50% 0%, #14171a 0%, var(--plate) 55%),
    var(--plate);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding: clamp(10px, 2.5vw, 34px);
}
/* film grain over the whole plate */
body.plate::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 3;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E");
}

/* ── Sheet & registration ─────────────────────────────────────────── */
.sheet {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  border: 1px solid var(--frame);
  outline: 1px solid var(--frame-soft);
  outline-offset: 5px;
  padding: clamp(18px, 3.5vw, 56px) clamp(16px, 4vw, 64px);
  display: flex; flex-direction: column; gap: clamp(34px, 5vh, 64px);
}
/* Flex and grid children default to min-width:auto, so any wide descendant
   (the 700px-minimum figure, a long <pre>) pushes every sibling out and the
   whole page scrolls sideways. Pin them to 0 and let the designated
   overflow-x:auto containers do the scrolling instead. */
.sheet > *, .hero > *, .hero-run > * { min-width: 0; }
.reg-mark {
  position: absolute; width: 14px; height: 14px; pointer-events: none;
  border-color: var(--frame); border-style: solid; border-width: 0;
}
.reg-tl { top: -10px; left: -10px; border-top-width: 1px; border-left-width: 1px; }
.reg-tr { top: -10px; right: -10px; border-top-width: 1px; border-right-width: 1px; }
.reg-bl { bottom: -10px; left: -10px; border-bottom-width: 1px; border-left-width: 1px; }
.reg-br { bottom: -10px; right: -10px; border-bottom-width: 1px; border-right-width: 1px; }

.micro {
  font-family: var(--mono); font-size: 11px; letter-spacing: .22em;
  color: var(--ink-muted); text-transform: uppercase;
}
.dim { color: var(--ink-faint); }
.mono-inline { font-family: var(--mono); font-size: .92em; color: var(--seam); }

/* ── Registers ────────────────────────────────────────────────────── */
.register {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  border-bottom: 1px solid var(--frame-soft); padding-bottom: 14px;
}
.register-cell { display: flex; flex-direction: column; gap: 4px; }
.register-cell--right { text-align: right; }

/* ── Masthead ─────────────────────────────────────────────────────── */
.masthead {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  border-bottom: 1px solid var(--frame-soft); padding-bottom: 14px;
}
.mark {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 14px; letter-spacing: .3em;
  color: var(--ink); text-decoration: none;
}
.mast-nav { display: flex; align-items: center; gap: 6px 20px; flex-wrap: wrap; }
.mast-nav a {
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em;
  color: var(--ink-muted); text-decoration: none; padding: 6px 2px;
}
.mast-nav a:hover, .mast-nav a:focus-visible { color: var(--ink); }
.mast-nav a:focus-visible { outline: 2px solid var(--seam); outline-offset: 2px; }
.mast-ver { border: 1px solid var(--frame); padding: 5px 10px !important; color: var(--seam) !important; }
.mast-ver:hover { border-color: var(--seam); }
.mast-gh { display: inline-flex; align-items: center; color: var(--ink-muted); }
.mast-gh:hover { color: var(--ink); }

/* ── Hero ─────────────────────────────────────────────────────────── */
/* Centered title band spans the full sheet, then description (left) and the
   terminal (right) sit below it. The full width lets STRATUM go large. */
.hero {
  display: grid; gap: clamp(22px, 3.5vw, 44px);
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: start;
}
.hero-title { grid-column: 1 / -1; text-align: center; display: grid; gap: 12px; justify-items: center; }
.hero-title .titleplate-sub { margin: 0; }
/* Two columns hold down to phone widths; only stack when a side would be
   genuinely too narrow to read. */
@media (max-width: 640px) { .hero { grid-template-columns: 1fr; } }
.hero-say { display: grid; gap: 16px; align-content: start; }
.hero-run { display: grid; gap: 12px; align-content: start; }
/* Full-width band, so STRATUM can scale hard without overrunning a column. */
.hero .titleplate-name { font-size: clamp(72px, 17vw, 232px); }

/* Terminal transcript */
.term { border: 1px solid var(--frame-soft); background: #0a0c0d; overflow: hidden; }
.term-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 10px 14px; background: #14181b; border-bottom: 1px solid var(--frame-soft);
}
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3a4148; flex: none; }
.term-bar i:first-child { background: #8C3B2E; }
.term-bar i:nth-child(2) { background: #B08A2E; }
.term-bar i:nth-child(3) { background: #2E5D4B; }
.term-path {
  flex: 1; text-align: center; font-family: var(--mono); font-size: 11px;
  color: var(--ink-faint); letter-spacing: .08em;
}
.term-body {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.85; color: var(--ink);
}
/* The transcript scrolls as a block; its own <code> must not report wider than
   the scroller or the overflow audit can't tell a real break from a scroller. */
.term-body code { display: inline-block; min-width: max-content; }
.term-body .p { color: var(--seam); }
.term-body .s { color: #c9a03a; }
.term-body .c { color: var(--ink-faint); }
.term-body .ok { color: var(--seam); }

/* Install command + copy */
.install {
  display: flex; align-items: stretch; gap: 0;
  border: 1px solid var(--frame); background: var(--plate-well);
}
.install code {
  flex: 1; min-width: 0; padding: 14px 16px; overflow-x: auto; white-space: nowrap;
  font-family: var(--mono); font-size: 12.5px; color: var(--ink);
}
.copy {
  flex: none; padding: 0 18px; background: none; border: none;
  border-left: 1px solid var(--frame); cursor: pointer;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--ink-muted);
}
.copy:hover, .copy:focus-visible { background: #161a1d; color: var(--seam); }
.copy:focus-visible { outline: 2px solid var(--seam); outline-offset: -2px; }
.install-alt { margin: 0; }
.install-alt a { color: var(--ink-muted); }
.install-alt a:hover { color: var(--seam); }

/* ── Epoch scrubber — deterministic replay ────────────────────────── */
.scrub {
  border: 1px solid var(--frame-soft); border-left: 2px solid var(--t-pending);
  background: var(--plate-well); padding: 16px 18px; display: grid; gap: 10px;
}
.scrub-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.scrub-out { font-size: 13px; letter-spacing: .14em; color: var(--seam); }
.scrub-out.is-past { color: var(--t-pending); }
.scrub input[type=range] {
  width: 100%; margin: 0; accent-color: var(--seam);
  height: 28px; background: transparent; cursor: grab;
}
.scrub input[type=range]:active { cursor: grabbing; }
.scrub input[type=range]:focus-visible { outline: 2px solid var(--seam); outline-offset: 4px; }
.scrub-read { margin: 0; color: var(--ink); letter-spacing: .06em; }
.scrub-note { margin: 0; line-height: 1.6; letter-spacing: .02em; text-transform: none; }
.scrub-note em { color: var(--ink-muted); font-style: italic; }

/* ── Title plate ──────────────────────────────────────────────────── */
.titleplate { text-align: left; display: grid; gap: 18px; }
.titleplate-name {
  margin: 0;
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(64px, 12.5vw, 176px);
  line-height: .92;
  letter-spacing: .045em;
}
.titleplate-sub {
  margin: 0; font-family: var(--mono); font-size: clamp(12px, 1.6vw, 16px);
  letter-spacing: .58em; color: var(--red);
}
.titleplate-thesis {
  margin: 6px 0 0; max-width: 62ch; font-size: clamp(15px, 1.5vw, 18px);
  color: var(--ink-muted);
}
.titleplate-thesis em { color: var(--ink); font-style: italic; font-family: var(--display); }

/* ── Figure ───────────────────────────────────────────────────────── */
.fig { margin: 0; display: grid; gap: 14px; }
.fig-well {
  background: var(--plate-well);
  border: 1px solid var(--frame-soft);
  padding: clamp(8px, 1.5vw, 20px);
  overflow-x: auto;
}
.strata-fig { display: block; width: 100%; height: auto; min-width: 700px; }
.stratum { transition: filter .15s ease; }
.stratum:hover { filter: brightness(1.28) saturate(1.15); cursor: help; }
.fig-caption { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
#fig-live.live { color: var(--seam); }

/* ── Decoding layer ───────────────────────────────────────────────── */
.decode {
  margin: 0; padding: 16px 0 0;
  border-top: 1px solid var(--frame-soft);
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.decode-row { display: grid; grid-template-columns: 152px 1fr; gap: 4px 16px; align-items: baseline; }
.decode dt {
  font-family: var(--mono); font-size: 11px; letter-spacing: .16em;
  color: var(--ink); white-space: nowrap;
}
.decode dd { margin: 0; font-size: 14px; color: var(--ink-muted); line-height: 1.5; }
.decode dd em { color: var(--ink); font-style: italic; }
.decode-hint { margin: 14px 0 0; }
@media (max-width: 620px) { .decode-row { grid-template-columns: 1fr; } }
.sw { display: inline-block; width: 22px; height: 11px; margin-right: 8px; vertical-align: -1px; border: 1px solid rgba(0,0,0,.5); }
.sw--axiomatic { background: var(--t-axiomatic); }
.sw--verified { background: var(--t-verified); }
.sw--pending { background: var(--t-pending); }
.sw--narrative { background: var(--t-narrative); }
.sw--foreclosure {
  background: repeating-linear-gradient(-32deg, var(--t-foreclosure) 0 4px, #0f1114 4px 6px);
}
.seam { display: inline-block; width: 22px; height: 2px; background: var(--seam); vertical-align: 2px; margin-left: 6px; }

/* ── Audit panel — the record behind a layer ──────────────────────── */
.stratum { transition: filter .15s ease; }
.stratum:focus-visible { outline: 2px solid var(--seam); outline-offset: -2px; }
.stratum.is-selected { filter: brightness(1.35) saturate(1.2); }
.stratum-label { cursor: pointer; }
.stratum-label:hover { fill: var(--ink); }

.audit {
  border: 1px solid var(--frame); border-left: 2px solid var(--seam);
  background: var(--plate-well);
  padding: clamp(16px, 2.5vw, 28px);
}
@media (prefers-reduced-motion: no-preference) {
  .audit.open { animation: rise .3s cubic-bezier(.2,.7,.2,1) forwards; }
}
.audit-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.audit-title { margin: 2px 0 0; font-family: var(--mono); font-size: clamp(20px, 2.4vw, 26px); letter-spacing: .06em; }
.audit-x {
  background: none; border: 1px solid var(--frame); color: var(--ink-muted);
  width: 34px; height: 34px; flex: none; cursor: pointer; font-size: 14px;
}
.audit-x:hover, .audit-x:focus-visible { border-color: var(--seam); color: var(--ink); }
.audit-x:focus-visible { outline: 2px solid var(--seam); outline-offset: 2px; }

.audit-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 14px 0 4px; font-size: 12px; }
.audit-actor { font-family: var(--mono); font-size: 12px; color: var(--ink); }
.audit-badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  padding: 3px 8px; border: 1px solid var(--frame); color: var(--ink-muted);
}
.audit-badge--decision { border-color: var(--t-narrative); color: #9fc0dd; }
.audit-badge--foreclosure { border-color: var(--t-foreclosure); color: #d8a3bf; }
.audit-badge--verification { border-color: var(--seam); color: var(--seam); }
.audit-badge--root { border-color: var(--t-axiomatic); color: #e0917f; }

.audit-h {
  margin: 22px 0 8px; font-family: var(--mono); font-size: 11px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--ink-faint);
  border-bottom: 1px solid var(--frame-soft); padding-bottom: 6px;
}
.audit-claim { margin: 0; font-size: 16px; color: var(--ink); max-width: 74ch; }
.audit-none { margin: 0; font-size: 14px; color: var(--ink-faint); font-style: italic; }
.audit-why { margin: 6px 0 8px; font-size: 14px; color: var(--ink-muted); max-width: 74ch; }

.audit-ev { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.audit-ev li {
  display: grid; grid-template-columns: 108px 1fr auto; gap: 4px 14px; align-items: baseline;
  padding: 8px 12px; background: #0a0c0d; border-left: 2px solid var(--frame);
  font-size: 13px;
}
.audit-ev li.is-checked { border-left-color: var(--seam); }
.audit-ev li.is-cited { border-left-color: var(--t-pending); }
.audit-kind { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--ink-muted); }
.audit-ref { color: var(--ink); word-break: break-word; }
.audit-state { font-family: var(--mono); font-size: 11px; white-space: nowrap; }
.is-checked .audit-state { color: var(--seam); }
.is-cited .audit-state { color: var(--t-pending); }
@media (max-width: 620px) { .audit-ev li { grid-template-columns: 1fr; } }

.audit-trail { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.audit-trail > li { border-left: 1px solid var(--frame-soft); padding-left: 14px; }
.audit-trail code { font-family: var(--mono); font-size: 12px; color: var(--ink); }

.audit-ghosts { margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.ghost {
  font-family: var(--mono); font-size: 12px; padding: 4px 10px;
  border: 1px dashed var(--t-foreclosure); color: #d8a3bf; text-decoration: line-through;
}
.audit-shadow {
  margin: 0 0 6px; font-size: 14.5px; color: var(--ink-muted); max-width: 76ch;
  font-style: italic; border-left: 2px solid var(--t-foreclosure); padding-left: 14px;
}

/* Every record points at the canonical proof surface. */
.audit-canon {
  display: block; margin-top: 24px; padding: 14px 16px;
  border: 1px solid var(--seam); text-decoration: none;
  font-family: var(--mono); font-size: 13px; letter-spacing: .12em; color: var(--seam);
  transition: background .15s ease;
}
.audit-canon:hover, .audit-canon:focus-visible { background: rgba(88,214,141,.08); }
.audit-canon:focus-visible { outline: 2px solid var(--seam); outline-offset: 2px; }
.audit-canon-sub {
  display: block; margin-top: 5px; font-family: var(--body); font-size: 12.5px;
  letter-spacing: .02em; color: var(--ink-muted); text-transform: none;
}

/* One-line legend — comprehension before admiration. */
.decode-line {
  margin: 14px 0 0; padding-top: 14px; border-top: 1px solid var(--frame-soft);
  font-family: var(--mono); font-size: 12px; line-height: 1.9; color: var(--ink-muted);
  letter-spacing: .04em;
}
.decode-line b { color: var(--ink); font-weight: 500; }

/* The operational consequence, stated rather than implied. */
.thesis-punch {
  margin: 0; padding-left: 14px; border-left: 2px solid var(--red);
  font-size: clamp(15px, 1.6vw, 17.5px); color: var(--ink);
}

/* ── Quote ────────────────────────────────────────────────────────── */
.quote {
  border-left: 2px solid var(--red);
  padding: 6px 0 6px clamp(18px, 3vw, 40px);
  display: grid; gap: 14px;
  max-width: 66ch;
}
.quote blockquote { margin: 0; }
.quote p:first-child {
  margin: 0;
  font-family: var(--display); font-weight: 300; font-style: italic;
  font-size: clamp(22px, 3.2vw, 34px); line-height: 1.35;
}
.quote em { color: var(--seam); font-style: italic; }

/* ── Notes ────────────────────────────────────────────────────────── */
.notes {
  display: grid; gap: clamp(20px, 3vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.note { border-top: 1px solid var(--frame-soft); padding-top: 18px; }
.note h2 {
  margin: 0 0 10px; font-family: var(--display); font-weight: 600;
  font-size: clamp(19px, 2vw, 23px); letter-spacing: .01em;
}
.note-no { font-family: var(--mono); font-weight: 400; color: var(--red); margin-right: 10px; font-size: .85em; }
.note p { margin: 0; color: var(--ink-muted); font-size: 15.5px; }

/* ── Instrument register ──────────────────────────────────────────── */
.instrument { display: grid; gap: 22px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
/* Hero CTAs — art-deco plate frame, per-button tier color. The double rule
   (border + inset ::before) and the four corner registration ticks (::after)
   echo the sheet's own border + offset outline + corner marks, so the buttons
   read as survey-plate cartouches, not terminal boxes. --deco flips dark on
   hover when the button floods with its color. */
.cta {
  --cta-c: var(--frame);
  --deco: var(--cta-c);
  position: relative; flex: 1 1 240px; min-height: 70px;
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  padding: 16px 22px;
  font-family: var(--mono); font-size: 13.5px; letter-spacing: .18em;
  color: var(--deco); text-decoration: none; text-align: left;
  background: transparent; border: 1px solid var(--cta-c);
  transition: background .16s ease, color .16s ease, transform .16s ease;
  cursor: pointer;
}
.cta::before {   /* the offset inner rule — plate's outline-offset echo */
  content: ""; position: absolute; inset: 5px; border: 1px solid var(--deco);
  opacity: .3; pointer-events: none; transition: opacity .16s ease, border-color .16s ease;
}
.cta::after {    /* four corner registration ticks — plate's reg-marks echo */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  --t: 13px; --w: 1.5px;
  background:
    linear-gradient(var(--deco), var(--deco)) 0 0, linear-gradient(var(--deco), var(--deco)) 0 0,
    linear-gradient(var(--deco), var(--deco)) 100% 0, linear-gradient(var(--deco), var(--deco)) 100% 0,
    linear-gradient(var(--deco), var(--deco)) 0 100%, linear-gradient(var(--deco), var(--deco)) 0 100%,
    linear-gradient(var(--deco), var(--deco)) 100% 100%, linear-gradient(var(--deco), var(--deco)) 100% 100%;
  background-repeat: no-repeat;
  background-size:
    var(--t) var(--w), var(--w) var(--t), var(--t) var(--w), var(--w) var(--t),
    var(--t) var(--w), var(--w) var(--t), var(--t) var(--w), var(--w) var(--t);
}
.cta:hover, .cta:focus-visible { background: var(--cta-c); --deco: #0a0c0d; transform: translateY(-2px); }
.cta:hover::before, .cta:focus-visible::before { opacity: .55; }
.cta:hover .cta-sub, .cta:focus-visible .cta-sub { color: rgba(8, 10, 11, .74); }
.cta:focus-visible { outline: 2px solid var(--cta-c); outline-offset: 4px; }
.cta-sub { font-family: var(--body); font-size: 12.5px; letter-spacing: .02em; color: var(--ink-muted); text-transform: none; transition: color .16s ease; }
.cta[disabled] { opacity: .55; cursor: progress; }
.cta--fork { --cta-c: #5aa9d6; }      /* Fork a live log — blue */
.cta--atrium { --cta-c: #d0b25c; }     /* Open the Atrium — yellow */

/* Source register — no pill boxes. A colored underline that fills upward on
   hover, each entry its own tier color, breaking the boxiness. */
.reg-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2px; }
.reg {
  position: relative; display: grid; gap: 4px;
  padding: 16px 14px 16px 4px; text-decoration: none; color: var(--ink);
  border-bottom: 2px solid var(--reg-c);
  transition: color .15s ease, padding-left .15s ease;
}
.reg::before {
  content: ""; position: absolute; inset: auto 0 0 0; height: 0;
  background: var(--reg-c); opacity: .16; z-index: -1; transition: height .18s ease;
}
.reg:hover, .reg:focus-visible { padding-left: 14px; }
.reg:hover::before, .reg:focus-visible::before { height: 100%; }
.reg:focus-visible { outline: 2px solid var(--reg-c); outline-offset: 2px; }
.reg-label { font-family: var(--mono); font-size: 13.5px; letter-spacing: .18em; color: var(--reg-c); }
.reg-sub { font-size: 13px; color: var(--ink-muted); }
.reg--source { --reg-c: var(--seam); }
.reg--record { --reg-c: #b389c4; }
.reg--contract { --reg-c: var(--t-pending); }

.cli {
  margin: 0; padding: 18px 22px; overflow-x: auto;
  background: #0a0c0d; border: 1px solid var(--frame-soft);
  font-family: var(--mono); font-size: 13px; line-height: 1.8; color: var(--ink-muted);
}
.cli code { font-family: inherit; }

/* ── Colophon ─────────────────────────────────────────────────────── */
.colophon {
  display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap;
  border-top: 1px solid var(--frame-soft); padding-top: 16px;
}

/* ── Entry reveal (one orchestrated load; honors reduced motion) ──── */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(14px); animation: rise .55s cubic-bezier(.2,.7,.2,1) forwards; }
  .reveal:nth-of-type(1) { animation-delay: .05s; }
  .titleplate.reveal { animation-delay: .12s; }
  .fig.reveal { animation-delay: .24s; }
  .quote.reveal { animation-delay: .38s; }
  .notes .note:nth-child(1) { animation-delay: .46s; }
  .notes .note:nth-child(2) { animation-delay: .52s; }
  .notes .note:nth-child(3) { animation-delay: .58s; }
  .instrument.reveal { animation-delay: .66s; }
  @keyframes rise { to { opacity: 1; transform: none; } }
}

@media (max-width: 560px) {
  .register-cell--right { text-align: left; }
  .titleplate-sub { letter-spacing: .34em; font-size: 12px; }
  /* The plate's own frame costs horizontal room that small screens need for
     the figure; keep the register marks but let the sheet breathe. */
  .sheet { outline: none; padding-left: 14px; padding-right: 14px; }
  .masthead { gap: 10px; }
  .mast-nav { gap: 4px 14px; }
  .audit-meta { font-size: 11px; }
  .term-body, .install code { font-size: 11.5px; }
  /* Touch target floor for the scrubber thumb. */
  .scrub input[type=range] { height: 44px; }
}