/* Kelsmoor. Cold, airy, hairline. Mobile first; the 12-column sheet opens at 900px. */

:root {
  --bg: #E6E9ED;
  --surface: #F3F5F7;
  --ink: #1E2227;
  --muted: #59616B;
  --line: #C6CCD3;
  --accent: #3E6F96;
  --on-accent: #FFFFFF;

  --display: "Jost", "Century Gothic", "Helvetica Neue", Arial, sans-serif;
  --body: "Karla", "Helvetica Neue", Arial, sans-serif;

  --page: 1280px;
  --gutter: clamp(16px, 4.6vw, 72px);
  --gap: clamp(14px, 2vw, 28px);
  --air: clamp(96px, 14vw, 216px);
  --mast: 64px;
  --radius: 0;

  --slow: 1.1s;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--mast) + 28px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.68 var(--body);
  overflow-wrap: break-word;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; }
svg { display: block; }
button, input, textarea { font: inherit; color: inherit; border-radius: var(--radius); }

:focus-visible { outline: 1px solid var(--accent); outline-offset: 4px; }

/* ---------- frame ---------- */

.page {
  width: 100%;
  max-width: var(--page);
  margin-left: max(0px, calc((100% - var(--page)) * .38));
  padding-inline: var(--gutter);
}

.sheet {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  column-gap: var(--gap);
}

.room { padding-top: var(--air); }
.room--last { padding-bottom: var(--air); }
.room--flush { padding-bottom: 0; }

.skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 40;
  padding: .7rem 1.1rem;
  background: var(--ink);
  color: var(--surface);
}
.skip:focus { top: 12px; }

/* ---------- shared type ---------- */

.tag {
  display: block;
  font: 400 .72rem/1.5 var(--display);
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--muted);
}

.big {
  font: 200 clamp(2.35rem, 6.1vw, 5.5rem)/1.1 var(--display);
  letter-spacing: .07em;
}
.big--small { font-size: clamp(2.2rem, 4.5vw, 4rem); }
.big__ln { display: block; }

.mid {
  font: 300 clamp(1.5rem, 2.8vw, 2.4rem)/1.25 var(--display);
  letter-spacing: .06em;
}

.aside {
  max-width: 46ch;
  color: var(--muted);
  font-size: clamp(1.03rem, 1.2vw, 1.16rem);
  line-height: 1.72;
}

.thin {
  font: 200 clamp(3.4rem, 7vw, 6.2rem)/1 var(--display);
  letter-spacing: .02em;
}
.thin__pre {
  font-size: .2em;
  font-weight: 400;
  letter-spacing: .14em;
  color: var(--muted);
  vertical-align: .9em;
}

/* ---------- reveal: lines open, text settles ---------- */

.rule { position: relative; }
.rule::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: var(--line);
  transform-origin: 0 50%;
  transition: transform 1.2s var(--ease) var(--d, 0s), background-color .9s var(--ease);
}
.js .rule:not(.is-in)::before { transform: scaleX(0); }

.veil { transition: opacity var(--slow) var(--ease) var(--d, 0s), transform var(--slow) var(--ease) var(--d, 0s); }
.js .veil:not(.is-in) { opacity: 0; transform: translateY(12px); }

/* ---------- actions ---------- */

.act {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: .85rem 1.7rem;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--on-accent);
  font: 400 .78rem/1.35 var(--display);
  letter-spacing: .22em;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color .8s var(--ease), border-color .8s var(--ease);
}
.act:hover { background: var(--ink); border-color: var(--ink); }
.act:disabled { cursor: progress; opacity: .72; }

.quiet {
  display: inline-block;
  padding: .55rem 0;
  background:
    linear-gradient(var(--accent), var(--accent)) 0 100% / 0 1px no-repeat,
    linear-gradient(var(--muted), var(--muted)) 0 100% / 100% 1px no-repeat;
  color: var(--ink);
  font: 400 .76rem/1.4 var(--display);
  letter-spacing: .22em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-size .9s var(--ease);
}
.quiet:hover { background-size: 100% 1px, 100% 1px; }

/* ---------- mast ---------- */

.mast {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.mast__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  min-height: var(--mast);
}
.mark {
  font: 400 .92rem/1 var(--display);
  letter-spacing: .44em;
  text-decoration: none;
  text-transform: uppercase;
}

.burger {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  margin-right: -8px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
}
.burger span {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--ink);
  transition: transform .7s var(--ease);
}
.burger span:first-child { top: 18px; }
.burger span:last-child { top: 26px; }
.burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

.nav { display: flex; flex-wrap: wrap; align-items: center; gap: .2rem 1.2rem; width: 100%; padding-bottom: 14px; }
.nav a { text-decoration: none; }

.js .burger { display: block; }
.js .nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0;
  max-height: calc(100vh - var(--mast));
  overflow-y: auto;
  padding: 10px var(--gutter) 28px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .7s var(--ease), transform .7s var(--ease), visibility 0s linear .7s;
}
.js .nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity .7s var(--ease), transform .7s var(--ease), visibility 0s;
}
.js .nav a {
  display: block;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
  font: 300 1.2rem/1.3 var(--display);
  letter-spacing: .1em;
}
.js .nav .nav__go { margin-top: 18px; border: 0; padding: .95rem 1.1rem; background: var(--accent); color: var(--on-accent); text-align: center; }

/* ---------- opening ---------- */

.opening { padding-top: clamp(44px, 8vw, 104px); }
.opening__h {
  margin-top: clamp(20px, 2.4vw, 32px);
  font: 200 clamp(2.9rem, 7vw, 6.2rem)/1.08 var(--display);
  letter-spacing: .07em;
}
.opening__h span { display: block; }
.opening__h span:nth-child(2) { padding-left: .7em; }
.opening__h span:nth-child(3) { padding-left: 1.4em; }

.opening__text { margin-top: clamp(32px, 4vw, 56px); max-width: 44ch; color: var(--muted); }
.opening__acts { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 32px; margin-top: 32px; }

.opening__plate {
  width: min(100%, 340px);
  margin: clamp(48px, 8vw, 72px) 0 0 auto;
  transition: opacity 1.2s var(--ease);
}
.js .opening__plate:not(.is-in) { opacity: 0; }
.plate { width: 100%; height: auto; }
.plate__sheet { fill: var(--surface); }
.plate__soft, .plate__cue, .plate__mark { fill: none; stroke-width: 1; }
.plate__soft { stroke: var(--muted); stroke-opacity: .6; }
.plate__mark { stroke: var(--muted); }
.plate__cue { --c: var(--muted); stroke: var(--c); animation: plate-cue 18s linear infinite; }
.plate__cue--1 { --c: var(--ink); animation-delay: 2s; }
.plate__cue--2 { animation-delay: 8s; }
.plate__cue--3 { animation-delay: 14s; }
.plate__label { font: 400 13px var(--display); letter-spacing: .12em; fill: var(--muted); }

@keyframes plate-cue {
  0%, 6% { stroke: var(--c); }
  12%, 26% { stroke: var(--accent); }
  32%, 100% { stroke: var(--c); }
}

.draw { stroke-dasharray: 1; transition: stroke-dashoffset 1.4s var(--ease) var(--d, 0s); }
.js .draw { stroke-dashoffset: 1; }
.js .is-in .draw { stroke-dashoffset: 0; }

.measures { margin-top: clamp(56px, 8vw, 112px); }
.measure { padding: 1.3rem 0 clamp(26px, 3vw, 40px); }
.measure__note { margin-top: .7rem; color: var(--muted); }

/* ---------- section headers ---------- */

.lede { row-gap: clamp(18px, 2.4vw, 34px); }
.lede .aside { margin-left: clamp(0px, 7vw, 56px); }

/* ---------- format ribbon ---------- */

.ribbon {
  --h: clamp(320px, 34vw, 460px);
  margin-top: clamp(52px, 6vw, 92px);
  margin-right: calc(var(--gutter) * -1);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.js .ribbon { scrollbar-width: none; }
.js .ribbon::-webkit-scrollbar { display: none; }
.ribbon:focus-visible { outline-offset: -2px; }

.ribbon__track {
  position: relative;
  display: flex;
  gap: clamp(26px, 4vw, 60px);
  width: max-content;
  padding-right: var(--gutter);
}
.ribbon__track::after {
  content: "";
  position: absolute;
  top: calc(var(--h) + 28px + 9px);
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

.study {
  flex: 0 0 auto;
  width: calc(var(--h) * var(--r) + 28px);
  scroll-snap-align: start;
}
.study__frame {
  border: 14px solid transparent;
  border-image: url(../images/crop.svg) 14 / 14px / 0 stretch;
}
.study__cap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .25rem .8rem;
  margin-top: 20px;
  padding-inline: 14px;
}
.study__name { font: 400 1rem/1.4 var(--display); letter-spacing: .08em; }
.study__ratio { font: 400 .8rem/1.75 var(--display); letter-spacing: .12em; color: var(--muted); }
.study__line { grid-column: 1 / -1; color: var(--muted); font-size: .94rem; line-height: 1.55; }

.ad { width: 100%; height: auto; }
.ad * { vector-effect: non-scaling-stroke; }
.ad-p { fill: var(--surface); }
.ad-l, .ad-s, .ad-g, .ad-a { fill: none; stroke-width: 1; }
.ad-l { stroke: var(--ink); }
.ad-s { stroke: var(--muted); }
.ad-g { stroke: var(--line); }
.ad-a { stroke: var(--accent); }
.ad-f { fill: var(--accent); }
.ad-t { fill: var(--ink); font-family: var(--display); font-weight: 300; letter-spacing: .05em; }
.ad-b { fill: var(--muted); font-family: var(--body); }
.ad-k { fill: var(--muted); font-family: var(--display); letter-spacing: .12em; }
.ad-w { fill: var(--on-accent); font-family: var(--body); font-weight: 500; }
.ad-w--tag { font-family: var(--display); font-weight: 400; letter-spacing: .1em; }
.ad-turn { transform-box: fill-box; transform-origin: center; animation: ad-turn 16s ease-in-out infinite alternate; }

@keyframes ad-turn {
  from { transform: rotate(90deg); }
  to { transform: rotate(180deg); }
}

.ribbon__ctl { display: flex; align-items: center; gap: 18px; margin-top: 28px; }
.ribbon__ctl[hidden] { display: none; }
.ribbon__bar { position: relative; flex: 1 1 auto; min-width: 0; height: 1px; background: var(--line); }
.ribbon__bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: calc(var(--at, 0) * 76%);
  width: 24%;
  height: 1px;
  background: var(--accent);
}
.nudge {
  flex: 0 0 auto;
  width: 60px;
  height: 44px;
  padding: 16px 8px;
  background: none;
  border: 0;
  color: var(--ink);
  cursor: pointer;
  transition: opacity .8s var(--ease);
}
.nudge svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1; overflow: visible; }
.nudge:disabled { cursor: default; opacity: .32; }

/* ---------- workroom ---------- */

.pair { row-gap: clamp(36px, 5vw, 48px); margin-top: clamp(64px, 8vw, 120px); }
.pair__a, .pair__b { padding-top: 1.5rem; }
.pair .thin { font-size: clamp(4.2rem, 10vw, 9rem); }
.pair__name { margin-top: 1rem; font: 400 1.05rem/1.4 var(--display); letter-spacing: .08em; }
.pair__text { margin-top: .35rem; max-width: 36ch; color: var(--muted); }

.stair__tag { margin-top: clamp(72px, 10vw, 150px); margin-bottom: 1.6rem; }
.stair__step {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  column-gap: .4rem;
  row-gap: .25rem;
  padding-block: 1.2rem 1.5rem;
}
.stair__n { font: 300 .95rem/1.9 var(--display); letter-spacing: .1em; color: var(--muted); }
.stair__name { font: 300 1.3rem/1.45 var(--display); letter-spacing: .06em; }
.stair__text { grid-column: 2; color: var(--muted); }

/* ---------- batch planner ---------- */

.bench {
  margin-top: var(--air);
  padding-block: clamp(56px, 7vw, 112px);
  background: var(--surface);
  border-block: 1px solid var(--line);
}
.bench__head .mid { margin-top: .9rem; }

.tally {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 28px;
}
.tally__n, .tally__sum { font-family: var(--display); font-weight: 200; line-height: 1; letter-spacing: .02em; }
.tally__n { font-size: clamp(5rem, 11vw, 8.8rem); }
.tally__sum { font-size: clamp(2.5rem, 4.8vw, 4.1rem); }
.tally output { font: inherit; }
.tally__unit { font: 400 1rem/1 var(--display); letter-spacing: .14em; color: var(--muted); }
.tally__x { color: var(--muted); line-height: 1.5; }
.tally__x span { display: block; white-space: nowrap; }

.gauge { margin-top: clamp(40px, 5vw, 72px); }
.gauge__label { margin-bottom: .6rem; }
.gauge__track { --frac: .33333; position: relative; height: 64px; }
.gauge__track::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 50%;
  height: 1px;
  background: var(--muted);
}
.gauge__ticks {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 18px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.gauge__ticks i { flex: 0 0 1px; display: block; width: 1px; height: 8px; background: var(--muted); }
.gauge__ticks i:nth-child(10n + 1) { height: 24px; background: var(--ink); }
.gauge__fill {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 50%;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 -1px 0 var(--accent);
  transform: scaleX(var(--frac));
  transform-origin: 0 50%;
}
.gauge__input {
  -webkit-appearance: none;
  appearance: none;
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 64px;
  margin: 0;
  background: transparent;
  cursor: grab;
}
.gauge__input:active { cursor: grabbing; }
.gauge__input::-webkit-slider-runnable-track { height: 64px; background: transparent; }
.gauge__input::-moz-range-track { height: 64px; background: transparent; }
.gauge__input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 64px;
  border: 0;
  border-radius: 0;
  background:
    linear-gradient(var(--accent), var(--accent)) center top / 11px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) center bottom / 11px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) center / 2px 100% no-repeat;
}
.gauge__input::-moz-range-thumb {
  width: 24px;
  height: 64px;
  border: 0;
  border-radius: 0;
  background:
    linear-gradient(var(--accent), var(--accent)) center top / 11px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) center bottom / 11px 1px no-repeat,
    linear-gradient(var(--accent), var(--accent)) center / 2px 100% no-repeat;
}
.gauge__marks {
  display: flex;
  justify-content: space-between;
  padding-inline: 12px;
  margin-top: 4px;
  color: var(--muted);
  font: 300 .95rem/1.4 var(--display);
  letter-spacing: .06em;
}
.gauge__marks span { flex: 0 0 1px; display: flex; justify-content: center; white-space: nowrap; }

.bench__note { margin-top: 32px; max-width: 42ch; color: var(--muted); }
.bench__go { margin-top: 24px; }

/* ---------- patterns ---------- */

.patterns { margin-top: clamp(52px, 6vw, 92px); border-bottom: 1px solid var(--line); }
.pattern { padding-block: clamp(26px, 3.2vw, 46px); }
.pattern:hover::before, .q:hover::before { background: var(--accent); }
.pattern__fig { font: 200 clamp(2.7rem, 6vw, 5.2rem)/1.08 var(--display); letter-spacing: .04em; }
.pattern__body { margin-top: 1rem; }
.pattern__name { font: 400 1.14rem/1.4 var(--display); letter-spacing: .06em; }
.pattern__text { margin-top: .3rem; color: var(--muted); }
.patterns__go { margin-top: 36px; text-align: right; }

/* ---------- practice ---------- */

.craft { row-gap: 36px; margin-top: clamp(76px, 10vw, 160px); }
.craft__intro .mid { margin-top: .9rem; }
.craft__text { margin: 1.1rem 0 1.3rem; max-width: 46ch; color: var(--muted); }

.plain__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .15rem;
  padding-block: .95rem 1.05rem;
}
.plain__k { font: 400 1.04rem/1.5 var(--display); letter-spacing: .06em; }
.plain__v { color: var(--muted); font-size: 1rem; }

.trace { margin-top: clamp(84px, 12vw, 180px); }
.seam {
  position: relative;
  display: grid;
  gap: 1.8rem;
  margin-top: 36px;
  padding-left: 22px;
  border-left: 1px solid var(--line);
}
.seam.rule::before { display: none; }
.seam__stop { position: relative; }
.seam__stop::before {
  content: "";
  position: absolute;
  left: -22px;
  top: .85em;
  width: 13px;
  height: 1px;
  background: var(--muted);
}
.seam__stop:last-child::before { background: var(--accent); }
.seam__name { font: 400 1.1rem/1.5 var(--display); letter-spacing: .08em; }
.seam__text { margin-top: .3rem; color: var(--muted); }

.cycle { margin-top: clamp(84px, 12vw, 180px); }
.rounds { margin-top: 1.6rem; }
.round { padding-block: clamp(24px, 3vw, 44px) clamp(32px, 4vw, 60px); }
.round__head { display: flex; align-items: baseline; gap: .9rem; }
.round__word { font: 200 clamp(2.5rem, 5.4vw, 4.7rem)/1.1 var(--display); letter-spacing: .05em; }
.round__body { margin-top: 1rem; }
.round__line { font: 400 1.14rem/1.45 var(--display); letter-spacing: .05em; }
.round__text { margin-top: .6rem; max-width: 52ch; color: var(--muted); }
.ticks { margin-top: 1rem; color: var(--muted); font-size: .96rem; }
.ticks li { position: relative; padding: .18rem 0 .18rem 1.7rem; }
.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .95em;
  width: 15px;
  height: 1px;
  background: var(--muted);
}

.further { margin-top: clamp(84px, 12vw, 180px); display: grid; grid-template-columns: minmax(0, 1fr); column-gap: var(--gap); }
.further__title { padding-bottom: 28px; }
.further__item { padding-block: 1.05rem 1.5rem; color: var(--muted); }
.further__name { margin-bottom: .3rem; color: var(--ink); font: 400 1.08rem/1.45 var(--display); letter-spacing: .06em; }

/* ---------- house ---------- */

.canon { row-gap: clamp(36px, 5vw, 56px); margin-top: clamp(56px, 7vw, 104px); }
.canon__item { padding-top: 1.3rem; }
.canon__n { font: 200 clamp(3rem, 6vw, 5.2rem)/1 var(--display); letter-spacing: .03em; }
.canon__name { margin-top: 1rem; font: 300 1.4rem/1.35 var(--display); letter-spacing: .05em; }
.canon__text { margin-top: .55rem; max-width: 42ch; color: var(--muted); }

/* ---------- instruments ---------- */

.stack { margin-top: clamp(52px, 6vw, 92px); border-bottom: 1px solid var(--line); }
.stack__row { padding-block: 1.2rem 1.5rem; }
.stack__names {
  margin-top: .45rem;
  font: 200 clamp(1.7rem, 3.6vw, 3.1rem)/1.22 var(--display);
  letter-spacing: .05em;
}

/* ---------- questions ---------- */

.asks__head { margin-bottom: clamp(36px, 5vw, 56px); }
.asks__head .big { margin-top: 1.1rem; }
.asks__list { border-bottom: 1px solid var(--line); }

.q summary {
  position: relative;
  padding: 1.25rem 2.6rem 1.3rem 0;
  font: 300 clamp(1.14rem, 1.7vw, 1.36rem)/1.4 var(--display);
  letter-spacing: .04em;
  list-style: none;
  cursor: pointer;
}
.q summary::-webkit-details-marker { display: none; }
.q summary::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 1.45rem;
  width: 17px;
  height: 17px;
  background:
    linear-gradient(currentColor, currentColor) center / 17px 1px no-repeat,
    linear-gradient(currentColor, currentColor) center / 1px 17px no-repeat;
  transition: background-size .9s var(--ease);
}
.q[open] summary::after { background-size: 17px 1px, 1px 0; }
.q__a { padding: 0 2.6rem 1.7rem 0; color: var(--muted); }
.q[open] .q__a { animation: q-open 1s var(--ease); }

@keyframes q-open {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- enquiry ---------- */

.note { row-gap: 56px; }
.note__text .big { margin-top: 1.1rem; }
.note__text .aside { margin-top: 1.4rem; }
.note__facts { margin-top: 2.6rem; border-bottom: 1px solid var(--line); }
.note__facts li { padding-block: .8rem .9rem; font: 400 1rem/1.5 var(--display); letter-spacing: .06em; }
.note__more { margin-top: 1.8rem; }

.fitting {
  margin-inline: -14px;
  padding: 18px;
  border: 14px solid transparent;
  border-image: url(../images/crop.svg) 14 / 14px / 0 stretch;
}

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.field { margin-bottom: 1.7rem; }
.field label {
  display: block;
  margin-bottom: .25rem;
  color: var(--muted);
  font: 400 .72rem/1.6 var(--display);
  letter-spacing: .26em;
  text-transform: uppercase;
}
.field label span { letter-spacing: .12em; text-transform: none; font-size: .78rem; }
.field input, .field textarea {
  display: block;
  width: 100%;
  padding: .6rem .35rem;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--muted);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.5;
  transition: background-color .7s var(--ease), border-color .7s var(--ease), box-shadow .7s var(--ease);
}
.field textarea { min-height: 7.5rem; resize: vertical; }
.field input:focus, .field textarea:focus {
  outline: none;
  background: var(--surface);
  border-bottom-color: var(--accent);
  box-shadow: 0 1px 0 var(--accent);
}

.send { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; margin-top: 2.2rem; }
.send__small { flex: 1 1 14rem; color: var(--muted); font-size: .95rem; line-height: 1.5; }

.form-status { color: var(--ink); }
.form-status:not(:empty) {
  margin-top: 1.5rem;
  padding-top: .9rem;
  border-top: 1px solid var(--accent);
}

.thanks__h { font: 200 clamp(2rem, 4vw, 3.3rem)/1.15 var(--display); letter-spacing: .05em; }
.thanks__p { margin-top: 1.1rem; color: var(--muted); }
.thanks:focus { outline: none; }

/* ---------- foot ---------- */

.foot { padding-bottom: clamp(40px, 5vw, 64px); }
.foot__word {
  padding-top: clamp(32px, 5vw, 64px);
  font: 200 clamp(2.4rem, 9vw, 7.5rem)/1 var(--display);
  letter-spacing: .24em;
  text-transform: uppercase;
  white-space: nowrap;
}
.foot__row { display: grid; gap: 22px; margin-top: clamp(32px, 5vw, 64px); }
.foot__line { color: var(--muted); }
.foot__nav { display: flex; flex-wrap: wrap; gap: .3rem 1.5rem; }
.foot__nav a {
  padding-block: .3rem;
  color: var(--muted);
  font: 400 .72rem/1.7 var(--display);
  letter-spacing: .2em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color .8s var(--ease);
}
.foot__nav a:hover { color: var(--ink); }

/* ---------- 700+ ---------- */

@media (min-width: 700px) {
  .measures { display: grid; grid-template-columns: 5fr 4fr 3fr; }
  .plain__row { grid-template-columns: 8.5rem minmax(0, 1fr); column-gap: 1rem; align-items: baseline; }
  .further { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot__row { grid-template-columns: auto minmax(0, 1fr); align-items: baseline; }
  .foot__nav { justify-content: flex-end; }
  .tally { flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 1rem clamp(24px, 3.4vw, 52px); }
}

/* ---------- the 12-column sheet ---------- */

@media (min-width: 900px) {
  .sheet { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .big__ln--in { padding-left: 1.1em; }
  .act { white-space: nowrap; }

  .opening__tag { grid-column: 1 / 9; grid-row: 1; }
  .opening__h { grid-column: 1 / 9; grid-row: 2; }
  .opening__h span:nth-child(2) { padding-left: 1.35em; }
  .opening__h span:nth-child(3) { padding-left: 2.7em; }
  .opening__text { grid-column: 4 / 9; grid-row: 3; }
  .opening__plate { grid-column: 9 / 13; grid-row: 1 / 4; width: 100%; margin: 0; align-self: end; }
  .measures { grid-column: 1 / -1; }

  .lede .aside { margin-left: 0; }
  .lede--a .tag { grid-column: 1 / 4; padding-top: 1.9em; }
  .lede--a .big { grid-column: 4 / 13; }
  .lede--a .aside { grid-column: 7 / 12; }
  .lede--b .tag { grid-column: 1 / -1; }
  .lede--b .big { grid-column: 2 / 13; }
  .lede--b .aside { grid-column: 7 / 13; margin-top: clamp(8px, 2vw, 28px); }
  .lede--c .tag { grid-column: 1 / -1; }
  .lede--c .big { grid-column: 1 / 11; }
  .lede--c .aside { grid-column: 8 / 13; }
  .lede--d .tag { grid-column: 3 / -1; }
  .lede--d .big { grid-column: 3 / 13; }
  .lede--d .aside { grid-column: 3 / 8; }
  .lede--e .tag { grid-column: 9 / 13; }
  .lede--e .big { grid-column: 1 / 12; }
  .lede--e .aside { grid-column: 8 / 13; }
  .lede--f .tag { grid-column: 1 / 5; padding-top: 1.9em; }
  .lede--f .big { grid-column: 5 / 13; }
  .lede--f .aside { grid-column: 5 / 10; }

  .pair__a { grid-column: 1 / 6; }
  .pair__b { grid-column: 7 / 13; margin-top: clamp(40px, 6vw, 96px); }

  .stair__step {
    grid-template-columns: 3.4rem 11rem minmax(0, 1fr);
    margin-left: calc(var(--i) * 7%);
    padding-block: 1.5rem 1.9rem;
    align-items: baseline;
  }
  .stair__text { grid-column: 3; }

  .bench__head { grid-column: 1 / 5; }
  .tally { grid-column: 5 / 13; margin-top: 0; }
  .gauge { grid-column: 1 / -1; }
  .bench__note { grid-column: 1 / 8; align-self: center; margin-top: 36px; }
  .bench__go { grid-column: 8 / 13; justify-self: end; margin-top: 36px; }

  .pattern { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: baseline; }
  .pattern__fig { grid-column: 1 / 8; }
  .pattern:nth-child(even) .pattern__fig { grid-column: 2 / 8; }
  .pattern__body { grid-column: 8 / 13; margin-top: 0; }

  .craft--media .craft__intro { grid-column: 1 / 6; }
  .craft--media .craft__list { grid-column: 7 / 13; }
  .craft--make .craft__intro { grid-column: 5 / 11; }
  .craft--read .craft__intro { grid-column: 7 / 13; grid-row: 1; }
  .craft--read .craft__list { grid-column: 1 / 6; grid-row: 1; align-self: end; }

  .seam {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    column-gap: var(--gap);
    margin-top: 48px;
    padding-left: 0;
    border-left: 0;
  }
  .seam.rule::before { display: block; }
  .seam__stop { padding-top: 28px; }
  .seam__stop::before { left: 0; top: 0; width: 1px; height: 15px; }

  .round {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gap);
    align-items: baseline;
  }
  .round__head { grid-column: 1 / 7; gap: 1.4rem; }
  .round__body { grid-column: 7 / 13; margin-top: 0; }

  .further { margin-left: calc(2 / 12 * 100%); }

  .canon__item:nth-child(1) { grid-column: 1 / 6; }
  .canon__item:nth-child(2) { grid-column: 8 / 13; margin-top: clamp(40px, 6vw, 96px); }
  .canon__item:nth-child(3) { grid-column: 2 / 7; }
  .canon__item:nth-child(4) { grid-column: 8 / 13; margin-top: clamp(40px, 6vw, 96px); }

  .stack__row { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: baseline; }
  .stack__row dt { grid-column: 1 / 5; }
  .stack__names { grid-column: 5 / 13; margin-top: 0; }

  .asks__head { grid-column: 1 / 5; margin-bottom: 0; }
  .asks__list { grid-column: 6 / 13; }

  .note__text { grid-column: 1 / 6; }
  .fitting { grid-column: 7 / 13; margin-inline: 0; padding: clamp(22px, 3vw, 44px); align-self: start; }
}

/* ---------- full navigation ---------- */

@media (min-width: 1180px) {
  .js .burger { display: none; }
  .nav, .js .nav {
    position: static;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: clamp(20px, 2.3vw, 34px);
    width: auto;
    max-height: none;
    overflow: visible;
    padding: 0;
    background: none;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }
  .nav a, .js .nav a {
    padding: .35rem 0;
    border: 0;
    background: linear-gradient(var(--accent), var(--accent)) 0 100% / 0 1px no-repeat;
    color: var(--muted);
    font: 400 .72rem/1.5 var(--display);
    letter-spacing: .2em;
    text-transform: uppercase;
    transition: color .8s var(--ease), background-size .9s var(--ease);
  }
  .nav a:hover, .js .nav a:hover { background-size: 100% 1px; color: var(--ink); }
  .nav .nav__go, .js .nav .nav__go {
    margin: 0;
    padding: .72rem 1.1rem;
    background: var(--accent);
    color: var(--on-accent);
    transition: background-color .8s var(--ease);
  }
  .nav .nav__go:hover, .js .nav .nav__go:hover { background: var(--ink); color: var(--on-accent); }
}

/* ---------- smooth scroll only for those who want motion ---------- */

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .veil:not(.is-in), .js .opening__plate:not(.is-in) { opacity: 1 !important; transform: none !important; }
  .js .rule:not(.is-in)::before { transform: none !important; }
  .js .draw { stroke-dashoffset: 0 !important; }
}

@media print {
  .js .veil:not(.is-in), .js .opening__plate:not(.is-in) { opacity: 1; transform: none; }
  .js .rule:not(.is-in)::before { transform: none; }
  .js .draw { stroke-dashoffset: 0; }
}