/* ==========================================================================
   Zetta Digital Solutions — zettadigitalsolutions.com
   Direction: engineering datasheet. Flat printed colour on concrete paper,
   poster-width Archivo, serif leads, monospace part numbers. No gradients,
   no glows, no rounded cards — the page is a spec sheet for the studio.
   ========================================================================== */

:root {
  --paper:   #E4E3DC;   /* concrete */
  --panel:   #EDECE6;   /* lighter stock */
  --ink:     #15171A;
  --ink-70:  #4A4E52;
  --zinc:    #75786F;   /* annotation grey */
  --signal:  #EE4B12;   /* safety orange */
  --cobalt:  #1E3BD8;   /* drafting blue */
  --chalk:   #E9C948;   /* yellow, used twice on the whole page */
  --rule:    rgba(21, 23, 26, 0.22);
  --rule-2:  rgba(21, 23, 26, 0.10);

  --display: "Archivo", "Arial Narrow", sans-serif;
  --text:    "Archivo", system-ui, sans-serif;
  --serif:   "Newsreader", Georgia, serif;
  --mono:    "DM Mono", ui-monospace, "Courier New", monospace;

  --wrap:    1280px;
  --gut:     clamp(1.25rem, 4vw, 3.25rem);
  --idx:     clamp(0rem, 6vw, 7rem);   /* left index column */
}

/* ---------------- reset ---------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-variation-settings: "wdth" 100;
  font-size: clamp(0.975rem, 0.93rem + 0.2vw, 1.0625rem);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { margin: 0; font-family: var(--display); font-weight: 800; line-height: 1; }
p { margin: 0; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }
sup { font-size: 0.6em; vertical-align: super; line-height: 0; }
::selection { background: var(--signal); color: var(--panel); }
:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 3px; }

/* printed-stock grain: the one texture on the page */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 999; pointer-events: none;
  opacity: 0.32; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E");
}

.skip {
  position: absolute; left: 1rem; top: -60px; z-index: 300;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem;
  font-family: var(--mono); font-size: 0.75rem; text-decoration: none;
}
.skip:focus { top: 0.75rem; }

/* ---------------- shared ---------------- */
.wrap {
  width: 100%; max-width: var(--wrap); margin-inline: auto;
  padding-inline: var(--gut);
}

/* monospace annotation, used for every part number and label */
.kicker, .sectag, .spec__code, .spec__meta, .stage__no, .stage__out,
.scale__note, .scale__ticks em, .scale__ticks span, .mode__flag, .mode__for,
.kit__col h3, .colophon__col h3, .dim, .hero__spec dt, .stamp {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.band { padding-block: clamp(4.5rem, 9vw, 8rem); border-top: 1px solid var(--rule); }
.band--dark { background: var(--ink); color: var(--paper); border-top-color: var(--ink); }
.band--dark { --rule: rgba(228, 227, 220, 0.24); --rule-2: rgba(228, 227, 220, 0.12); --zinc: #9A9C93; }

/* ==========================================================================
   MASTHEAD
   ========================================================================== */
.masthead {
  position: sticky; top: 0; z-index: 120;
  background: var(--paper);
  border-bottom: 1px solid var(--ink);
}
.masthead__in {
  max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gut);
  display: flex; align-items: center; gap: 2rem; min-height: 72px;
}
.mark { text-decoration: none; display: grid; line-height: 1; }
.mark__word {
  font-family: var(--display); font-weight: 800; font-size: 1.45rem;
  font-variation-settings: "wdth" 118; letter-spacing: -0.02em;
}
/* The exponent carries the meaning of the name: zetta is the SI prefix for
   10^21. Decorative to a screen reader, so the markup hides it from one. */
.mark__word sup {
  font-family: var(--mono); font-size: 0.32em; font-weight: 400;
  color: var(--signal); letter-spacing: 0.02em;
  vertical-align: super; margin-left: 2px;
}
.mark__sub {
  font-family: var(--mono); font-size: 0.58rem; text-transform: uppercase;
  letter-spacing: 0.22em; color: var(--zinc); margin-top: 3px;
}

.mainnav { margin-left: auto; display: flex; gap: 1.6rem; }
.mainnav a {
  font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.1em; text-decoration: none; color: var(--ink-70);
  padding: 4px 0; border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}
.mainnav a:hover, .mainnav a.on { color: var(--signal); border-bottom-color: var(--signal); }

.burger {
  display: none; margin-left: auto;
  font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em;
  background: var(--ink); color: var(--paper); border: 0; padding: 0.6rem 0.9rem; cursor: pointer;
}
.drawer { display: none; border-top: 1px solid var(--rule); padding: 0 var(--gut) 1rem; }
.drawer:not([hidden]) { display: grid; }
.drawer a {
  font-family: var(--mono); font-size: 0.85rem; text-decoration: none;
  padding: 0.85rem 0; border-bottom: 1px solid var(--rule-2);
}
.drawer a:last-child { color: var(--signal); border-bottom: 0; }

@media (max-width: 960px) {
  .mainnav, .masthead__in > .act { display: none; }
  .burger { display: block; }
}
@media (min-width: 961px) { .drawer:not([hidden]) { display: none; } }

/* ==========================================================================
   BUTTONS — flat blocks, square corners, colour inverts on hover
   ========================================================================== */
.act {
  display: inline-block;
  background: var(--signal); color: var(--panel);
  font-family: var(--mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.1em;
  padding: 0.85rem 1.35rem; text-decoration: none;
  border: 1px solid var(--signal);
  transition: background .15s, color .15s, border-color .15s;
}
.act:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.act--lg { padding: 1.1rem 1.9rem; font-size: 0.82rem; }
.act--line { background: transparent; color: var(--ink); border-color: var(--ink); }
.act--line:hover { background: var(--ink); color: var(--paper); }
.act--dark { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.act--dark:hover { background: var(--panel); border-color: var(--panel); color: var(--ink); }

/* ==========================================================================
   SECTION INDEX (left margin, editorial — not a floating widget)
   ========================================================================== */
.index { position: fixed; left: 0; top: 50%; transform: translateY(-50%); z-index: 90; }
.index ol { padding-left: clamp(0.75rem, 1.6vw, 1.4rem); display: grid; gap: 0.45rem; }
.index a {
  display: flex; align-items: baseline; gap: 0.55rem; text-decoration: none;
  font-family: var(--mono); font-size: 0.66rem;
}
.index i { font-style: normal; color: var(--zinc); transition: color .2s; }
.index span {
  text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.58rem; color: var(--zinc);
  opacity: 0; transform: translateX(-4px); transition: opacity .2s, transform .2s, color .2s;
  white-space: nowrap;
}
.index a:hover i, .index a:focus-visible i { color: var(--ink); }
.index a:hover span, .index a:focus-visible span { opacity: 1; transform: none; }
.index a[aria-current="true"] i { color: var(--signal); }
.index a[aria-current="true"] i::before { content: "\25A0 "; }
.index a[aria-current="true"] span { opacity: 1; transform: none; color: var(--ink); }
.index.on-dark i, .index.on-dark span { color: #8D9088; }
.index.on-dark a:hover i, .index.on-dark a[aria-current="true"] span { color: var(--paper); }
@media (max-width: 1180px) { .index { display: none; } }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero { padding-top: clamp(2.5rem, 6vw, 5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 7.2fr) minmax(0, 3fr);
  gap: clamp(2rem, 5vw, 4.5rem) clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.hero__lead { grid-column: 1; }
.hero__spec { grid-column: 2; grid-row: 1 / span 2; }
.hero__body { grid-column: 1; }

.kicker {
  display: flex; align-items: center; gap: 0.9rem;
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--zinc);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}
.kicker__rule { flex: 0 0 56px; height: 1px; background: var(--ink); }
@media (max-width: 520px) { .kicker__rule { display: none; } .kicker { gap: 0.5rem; } }

.hero__h1 {
  font-size: clamp(2.7rem, 8.4vw, 6.6rem);
  font-variation-settings: "wdth" 112;
  letter-spacing: -0.035em;
  line-height: 0.92;
  text-wrap: balance;
}
/* One condensed orange word inside the expanded black setting. Archivo is
   loaded without an italic axis, so this leans on the width axis instead of
   asking the browser to fake an oblique. */
.hero__h1 .hl {
  color: var(--signal);
  font-variation-settings: "wdth" 82;
}

.lede {
  font-family: var(--serif); font-size: clamp(1.15rem, 1rem + 0.7vw, 1.55rem);
  line-height: 1.45; max-width: 46ch; color: var(--ink-70);
}
.hero__acts { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: clamp(1.75rem, 3.5vw, 2.5rem); }

/* margin spec block */
.hero__spec { border-top: 2px solid var(--ink); padding-top: 1rem; }
.hero__spec-title {
  font-family: var(--mono);
  font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--zinc); margin-bottom: 1.25rem;
}
/* Label above value, not beside it — the answers are sentences, not figures. */
.hero__spec dl { display: grid; }
.hero__spec dl > div { padding: 0.8rem 0; border-bottom: 1px solid var(--rule-2); }
.hero__spec dt {
  font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--signal); margin-bottom: 0.3rem;
}
.hero__spec dd { margin: 0; font-size: 0.95rem; font-weight: 500; line-height: 1.4; }

.stamp {
  margin: 2.25rem 0 0; width: 136px; height: 136px;
  display: grid; place-content: center; text-align: center;
  border: 2px solid var(--signal); border-radius: 50%;
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 4px var(--signal);
  color: var(--signal); rotate: -8deg;
  font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.14em; line-height: 1.8;
}
.stamp b { font-family: var(--display); font-size: 1.85rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__lead, .hero__body, .hero__spec { grid-column: 1; }
  .hero__spec { grid-row: auto; }
}

/* ---------- Fig. 1 — the dimension line ---------- */
.scale { margin: clamp(3.5rem, 8vw, 6rem) 0 0; padding-bottom: clamp(3rem, 6vw, 4.5rem); }
.scale__note {
  display: flex; align-items: baseline; gap: 0.9rem;
  font-size: 0.68rem; color: var(--zinc); margin-bottom: 2.25rem;
}
.scale__tag { color: var(--cobalt); text-transform: uppercase; letter-spacing: 0.12em; }

.scale__rule { position: relative; border-top: 1px solid var(--ink); }
.scale__cap {
  position: absolute; top: -6px; width: 1px; height: 12px; background: var(--ink);
}
.scale__cap--l { left: 0; }
.scale__cap--r { right: 0; }

.scale__ticks { display: flex; justify-content: space-between; }
.scale__ticks li {
  position: relative; padding-top: 1.25rem; display: grid; gap: 2px; justify-items: center;
  flex: 0 0 auto; text-align: center;
}
.scale__ticks li::before {
  content: ""; position: absolute; top: 0; left: 50%; width: 1px; height: 11px; background: var(--rule);
}
.scale__ticks b {
  font-family: var(--display); font-weight: 700; font-size: clamp(1.1rem, 3vw, 1.75rem);
  font-variation-settings: "wdth" 110; color: var(--ink-70); line-height: 1;
}
.scale__ticks em { font-style: normal; font-size: 0.66rem; color: var(--zinc); }
.scale__ticks span {
  font-size: 0.54rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--zinc);
}
.scale__ticks .is-z::before { background: var(--signal); height: 17px; width: 2px; }
.scale__ticks .is-z b { color: var(--signal); font-size: clamp(1.5rem, 4vw, 2.5rem); }
.scale__ticks .is-z em,
.scale__ticks .is-z span { color: var(--signal); }

.scale__foot {
  margin-top: 2.5rem; font-family: var(--serif); font-style: italic;
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.2rem); color: var(--ink-70);
}
@media (max-width: 620px) {
  .scale__ticks span { display: none; }
}

/* ==========================================================================
   SECTION HEADS
   ========================================================================== */
.sechead { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.sectag {
  display: flex; align-items: baseline; gap: 0.7rem;
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--zinc);
  margin-bottom: 1.5rem;
}
.sectag i { font-style: normal; color: var(--signal); }
.sectag--inv { color: rgba(21,23,26,.6); }
.sectag--inv i { color: var(--ink); }
.sech2 {
  font-size: clamp(1.75rem, 4.2vw, 3.15rem);
  font-variation-settings: "wdth" 106;
  letter-spacing: -0.03em; line-height: 0.98;
  text-wrap: balance;
  max-width: 18ch;   /* measured in the display face, not the body face */
}
.sechead__note {
  margin-top: 1.1rem; font-family: var(--serif); font-size: 1.1rem; color: var(--ink-70);
  max-width: 44ch;
}
.band--dark .sechead__note { color: #B9BBB2; }

/* ==========================================================================
   01 — SERVICES, as a spec table
   ========================================================================== */
.spec { border-top: 1px solid var(--ink); }
.spec__row {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr) minmax(0, 15rem);
  gap: clamp(1.25rem, 3vw, 3rem);
  padding: clamp(1.5rem, 3vw, 2.25rem) clamp(0.75rem, 2vw, 1.5rem);
  margin-inline: clamp(-1.5rem, -2vw, -0.75rem);
  border-bottom: 1px solid var(--rule);
  transition: background .18s, color .18s;
}
.spec__row:hover { background: var(--signal); color: var(--panel); }

.spec__code { font-size: 0.78rem; letter-spacing: 0.1em; color: var(--signal); transition: color .18s; }
.spec__code i { font-style: normal; color: var(--zinc); transition: color .18s; }
.spec__row:hover .spec__code,
.spec__row:hover .spec__code i { color: var(--panel); }

.spec__main h3 {
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  font-variation-settings: "wdth" 104; font-weight: 700;
  letter-spacing: -0.025em; margin-bottom: 0.6rem;
}
.spec__main p { color: var(--ink-70); max-width: 52ch; transition: color .18s; }
.spec__row:hover .spec__main p { color: rgba(237, 236, 230, 0.92); }

.spec__meta { display: grid; gap: 0.35rem; align-content: start; padding-top: 0.35rem; }
.spec__meta li { font-size: 0.7rem; color: var(--zinc); transition: color .18s; }
.spec__meta li::before { content: "— "; }
.spec__row:hover .spec__meta li { color: rgba(237, 236, 230, 0.88); }

@media (max-width: 860px) {
  .spec__row { grid-template-columns: 5rem minmax(0, 1fr); }
  .spec__meta { grid-column: 2; }
}
@media (max-width: 520px) {
  .spec__row { grid-template-columns: 1fr; gap: 0.9rem; }
  .spec__meta { grid-column: 1; }
}

.ask {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2rem; align-items: center;
  border: 1px solid var(--ink); border-left: 5px solid var(--cobalt);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}
.ask__text { font-family: var(--serif); font-size: clamp(1.05rem, 1rem + 0.4vw, 1.3rem); max-width: 58ch; }
@media (max-width: 720px) { .ask { grid-template-columns: 1fr; } .ask .act { justify-self: start; } }

/* ==========================================================================
   02 — PROCESS, as a measured drawing
   ========================================================================== */
.dim {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--zinc);
  margin-bottom: 2.5rem;
}
.dim__line { flex: 1; height: 1px; background: var(--rule); }
.dim__arrow { font-size: 0.6rem; color: var(--zinc); }
.dim__val { white-space: nowrap; color: var(--chalk); }
@media (max-width: 560px) {
  /* The annotation must not force the drawing wider than the screen. */
  .dim { font-size: 0.58rem; letter-spacing: 0.08em; gap: 0.5rem; }
  .dim__arrow { display: none; }
}

.stages { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stage {
  padding: 1.75rem clamp(1rem, 2vw, 1.75rem) 0 0;
  border-top: 1px solid var(--rule);
  position: relative;
}
.stage::before {
  content: ""; position: absolute; top: 0; left: 0; width: 2px; height: 22px; background: var(--signal);
}
.stage__no {
  display: block; font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--signal); margin-bottom: 1.1rem;
}
.stage h3 {
  font-size: 1.16rem; font-weight: 700; font-variation-settings: "wdth" 104;
  letter-spacing: -0.02em; line-height: 1.12; margin-bottom: 0.7rem;
}
.stage p { color: #B9BBB2; font-size: 0.94rem; }
.stage__out {
  display: inline-block; margin-top: 1.25rem; padding-top: 0.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--chalk);
}
@media (max-width: 900px) { .stages { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .stages { grid-template-columns: 1fr; } .stage { padding-right: 0; } }

/* ==========================================================================
   03 — STACK, plain typographic lists
   ========================================================================== */
.kit { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 clamp(1.5rem, 4vw, 3.5rem); }
.kit__col { border-top: 2px solid var(--ink); padding-top: 1.1rem; }
.kit__col h3 {
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--zinc);
  font-weight: 400; margin-bottom: 1.1rem;
}
.kit__col ul { display: grid; }
.kit__col li {
  font-family: var(--display); font-size: clamp(1.05rem, 1.9vw, 1.45rem); font-weight: 600;
  font-variation-settings: "wdth" 102; letter-spacing: -0.02em;
  padding: 0.55rem 0; border-bottom: 1px solid var(--rule-2);
  transition: color .15s, padding-left .15s;
}
.kit__col li:hover { color: var(--cobalt); padding-left: 0.5rem; }
@media (max-width: 820px) { .kit { grid-template-columns: 1fr; gap: 2.5rem; } }

/* ==========================================================================
   04 — ENGAGEMENT
   ========================================================================== */
.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.mode {
  position: relative;
  padding: 1.75rem clamp(1.25rem, 2.5vw, 2rem);
  border: 1px solid var(--rule);
  margin-left: -1px;
}
.mode--pick { background: var(--ink); color: var(--paper); border-color: var(--ink); z-index: 1; }
.mode__flag {
  position: absolute; top: 0; right: 0;
  background: var(--chalk); color: var(--ink);
  font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.12em;
  padding: 0.35rem 0.6rem;
}
.mode h3 {
  font-size: clamp(1.2rem, 2.2vw, 1.65rem); font-weight: 700;
  font-variation-settings: "wdth" 106; letter-spacing: -0.025em; margin-bottom: 0.7rem;
}
.mode__lede { font-family: var(--serif); font-size: 1.05rem; color: var(--ink-70); }
.mode--pick .mode__lede { color: #B9BBB2; }
.mode ul { margin: 1.4rem 0; display: grid; gap: 0.5rem; border-top: 1px solid var(--rule); padding-top: 1.4rem; }
.mode--pick ul { border-top-color: rgba(228,227,220,.25); }
.mode li { font-size: 0.92rem; padding-left: 1.1rem; position: relative; color: var(--ink-70); }
.mode--pick li { color: #C6C8BF; }
.mode li::before { content: "+"; position: absolute; left: 0; color: var(--signal); font-family: var(--mono); }
.mode__for {
  font-size: 0.64rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--zinc);
  border-top: 1px solid var(--rule); padding-top: 0.9rem;
}
.mode--pick .mode__for { border-top-color: rgba(228,227,220,.25); color: #9A9C93; }
@media (max-width: 880px) { .modes { grid-template-columns: 1fr; } .mode { margin: -1px 0 0; } }

/* ==========================================================================
   05 — QUESTIONS
   ========================================================================== */
.qs { border-top: 1px solid var(--ink); max-width: 940px; }
.q { border-bottom: 1px solid var(--rule); }
.q summary {
  list-style: none; cursor: pointer;
  display: grid; grid-template-columns: 2.5rem minmax(0, 1fr) 1.5rem; align-items: baseline;
  padding: 1.3rem 0;
  font-family: var(--display); font-weight: 600; font-size: clamp(1.02rem, 1.6vw, 1.25rem);
  font-variation-settings: "wdth" 104; letter-spacing: -0.02em;
  transition: color .15s;
}
.q summary::-webkit-details-marker { display: none; }
.q summary::before {
  content: counter(qc, decimal-leading-zero);
  font-family: var(--mono); font-size: 0.7rem; font-weight: 400; color: var(--zinc); letter-spacing: 0.06em;
}
.qs { counter-reset: qc; }
.q { counter-increment: qc; }
.q summary::after {
  content: "+"; justify-self: end;
  font-family: var(--mono); font-weight: 400; color: var(--signal); font-size: 1.05rem;
}
.q[open] summary::after { content: "\2212"; }
.q summary:hover { color: var(--signal); }
.q__a { padding: 0 1.5rem 1.5rem 2.5rem; }
.q__a p { font-family: var(--serif); font-size: 1.1rem; color: var(--ink-70); max-width: 64ch; }

/* ==========================================================================
   06 — CLOSE (full-bleed safety orange)
   ========================================================================== */
.close {
  background: var(--signal); color: var(--ink);
  padding-block: clamp(4.5rem, 10vw, 8.5rem);
  border-top: 1px solid var(--ink);
}
.close__in { max-width: 62rem; }
.close__h2 {
  font-size: clamp(2.2rem, 6.6vw, 5rem);
  font-variation-settings: "wdth" 114;
  letter-spacing: -0.035em; line-height: 0.93;
  text-wrap: balance;
  margin-bottom: 1.5rem;
}
.close__lede {
  font-family: var(--serif); font-size: clamp(1.1rem, 1rem + 0.55vw, 1.4rem);
  max-width: 52ch; margin-bottom: 2.5rem; color: rgba(21,23,26,.82);
}
.close__alt { margin-top: 1.5rem; font-family: var(--mono); font-size: 0.74rem; color: rgba(21,23,26,.7); }
.close__alt a { color: var(--ink); text-underline-offset: 3px; }

/* ==========================================================================
   COLOPHON
   ========================================================================== */
.colophon { background: var(--ink); color: var(--paper); padding-top: clamp(3rem, 6vw, 4.5rem); }
.colophon__in {
  display: grid; grid-template-columns: 1.7fr 1fr 1fr 1.3fr; gap: 2.5rem 2rem;
  padding-bottom: 3rem;
}
/* The spans stack here the same way .mark stacks them in the masthead. */
.colophon__brand { display: grid; justify-items: start; }
.colophon__brand .mark__word { line-height: 1; }
.colophon__brand .mark__sub { color: #8D9088; }
.colophon__brand p { margin-top: 1rem; color: #9A9C93; font-size: 0.9rem; max-width: 26ch; }
.colophon__col { display: grid; align-content: start; gap: 0.5rem; }
.colophon__col h3 {
  font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.18em;
  font-weight: 400; color: #8D9088; margin-bottom: 0.5rem;
}
.colophon__col a { text-decoration: none; color: #C6C8BF; font-size: 0.9rem; justify-self: start; transition: color .15s; }
.colophon__col a:hover { color: var(--signal); }
.colophon__rule {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem;
  border-top: 1px solid rgba(228,227,220,.2); padding-block: 1.4rem 2rem;
  font-family: var(--mono); font-size: 0.66rem; color: #8D9088;
}
@media (max-width: 820px) { .colophon__in { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .colophon__in { grid-template-columns: 1fr; } }

/* ==========================================================================
   MOTION — restrained: one draw-in for Fig. 1, nothing else moves on scroll
   ========================================================================== */
.scale__ticks li { opacity: 0; }
.js .scale__ticks li { animation: tick .45s ease-out forwards; }
.js .scale__ticks li:nth-child(1) { animation-delay: .10s; }
.js .scale__ticks li:nth-child(2) { animation-delay: .17s; }
.js .scale__ticks li:nth-child(3) { animation-delay: .24s; }
.js .scale__ticks li:nth-child(4) { animation-delay: .31s; }
.js .scale__ticks li:nth-child(5) { animation-delay: .38s; }
.js .scale__ticks li:nth-child(6) { animation-delay: .45s; }
.js .scale__ticks li:nth-child(7) { animation-delay: .56s; }
@keyframes tick { from { opacity: 0; translate: 0 6px; } to { opacity: 1; translate: 0 0; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .scale__ticks li { opacity: 1; }
}