/* =========================================================================
   YIWU PUYOUNG — trade dossier design system
   paper / ink / kiln (rust) / canopy (deep green)
   Instrument Serif (display) · IBM Plex Sans (body) · IBM Plex Mono (data)
   No images: every graphic element here is type, rule or CSS gradient.
   ========================================================================= */

@import url("fonts.css");

:root {
  /* colour */
  --paper:      #F4F0E8;
  --paper-2:    #EBE4D6;
  --paper-3:    #E2D9C7;
  --ink:        #16150F;
  --ink-soft:   #2A2720;
  --body:       #4F493D;
  --muted:      #857C6A;
  --line:       #D8CEBB;
  --line-soft:  #E4DCCA;
  --kiln:       #A04A28;   /* rust — marks, rules, small accents */
  --canopy:     #1C2822;   /* deep green — dark bands */
  --on-dark:    #EFE9DC;
  --on-dark-60: rgba(239, 233, 220, .58);
  --gold:       #B3924F;

  /* type */
  --display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --step--1: clamp(.8125rem, .78rem + .16vw, .875rem);
  --step-0:  clamp(1rem, .96rem + .22vw, 1.0625rem);
  --step-1:  clamp(1.1875rem, 1.1rem + .5vw, 1.4375rem);
  --step-2:  clamp(1.6rem, 1.34rem + 1.15vw, 2.375rem);
  --step-3:  clamp(2.1rem, 1.6rem + 2.4vw, 3.75rem);
  --step-4:  clamp(2.75rem, 1.75rem + 4.6vw, 5.5rem);

  /* layout */
  --maxw: 1360px;
  --gutter: clamp(20px, 4.2vw, 64px);
  --section: clamp(64px, 8.5vw, 140px);
  --rule: 1px solid var(--line);

  /* motion */
  --ease: cubic-bezier(.22, .68, .3, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--body);
  font-family: var(--sans);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: var(--kiln); color: #fff; }
:focus-visible { outline: 2px solid var(--kiln); outline-offset: 3px; }

/* faint paper grain */
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 200; pointer-events: none;
  opacity: .035; 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='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- type ---------- */
h1, h2, h3, h4 { font-family: var(--display); font-weight: 400; color: var(--ink); line-height: .98; letter-spacing: -.015em; }
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); line-height: 1.05; }
h4 { font-size: var(--step-1); line-height: 1.15; letter-spacing: 0; }
em, .italic { font-style: italic; }
p { max-width: 62ch; }
.lead { font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); max-width: 46ch; }
.prose > * + * { margin-top: 1.1em; }
.prose p { max-width: 58ch; }
strong { font-weight: 600; color: var(--ink-soft); }

.eyebrow, .mono {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--muted);
}
.eyebrow { display: flex; align-items: center; gap: .7em; color: var(--kiln); }
.eyebrow::before { content: ""; width: 26px; height: 1px; background: currentColor; opacity: .7; }
.mono-ink { color: var(--ink-soft); }
.coords { font-family: var(--mono); font-size: .625rem; letter-spacing: .22em; text-transform: uppercase; color: var(--muted); }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section); }
.section-tight { padding-block: clamp(48px, 5vw, 80px); }
.rule-top { border-top: var(--rule); }
.grid { display: grid; gap: clamp(24px, 3vw, 48px); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* corrugation band — CSS only, echoes container ribs and panel profiles */
.corrugation {
  height: 40px;
  border-block: var(--rule);
  background-image: repeating-linear-gradient(90deg, transparent 0 13px, rgba(22,21,15,.16) 13px 14px);
}

/* ---------- top strip ---------- */
.strip {
  border-bottom: var(--rule);
  background: var(--paper-2);
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--muted);
}
.strip .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; min-height: 38px; flex-wrap: wrap;
}
.strip a:hover { color: var(--kiln); }
.strip .strip-links { display: flex; gap: 1.4rem; }

/* ---------- masthead ---------- */
.masthead { position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(9px); border-bottom: var(--rule); }
.masthead .wrap { display: flex; align-items: center; gap: 2rem; min-height: 76px; }
.wordmark { display: flex; align-items: baseline; gap: .6rem; margin-right: auto; }
.wordmark .mark {
  font-family: var(--display); font-size: 1.75rem; letter-spacing: -.02em;
  color: var(--ink); line-height: 1;
}
.wordmark .mark span { color: var(--kiln); }
.wordmark .sub { font-family: var(--mono); font-size: .625rem; letter-spacing: .22em; color: var(--muted); text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.1rem); }
.nav a {
  font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-soft); padding: .4rem 0; position: relative; white-space: nowrap;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: var(--kiln); transition: right .35s var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { right: 0; }
.nav a[aria-current="page"] { color: var(--kiln); }

.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase;
  padding: .85rem 1.35rem; border: 1px solid var(--ink); color: var(--ink);
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
  min-height: 44px;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--kiln); border-color: var(--kiln); }
.btn--kiln { background: var(--kiln); border-color: var(--kiln); color: #fff; }
.btn--kiln:hover { background: var(--ink); border-color: var(--ink); }
.btn--ghost { border-color: var(--line); color: var(--ink-soft); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); background: transparent; color: var(--ink); }
.btn .arrow { transition: transform .35s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }
.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; }

.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero { border-bottom: var(--rule); }
.hero .wrap { padding-block: clamp(48px, 6vw, 104px) clamp(36px, 4vw, 64px); }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.26fr) minmax(0, .74fr);
  gap: clamp(32px, 5vw, 80px); align-items: start;
}
.hero h1 { margin: 1.2rem 0 1.6rem; }
.hero h1 em { color: var(--kiln); }
.hero h1 .line { display: block; }
.hero .lead { margin-bottom: 2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.hero-meta {
  display: grid; grid-template-columns: repeat(3, auto); gap: clamp(1.2rem, 3vw, 2.6rem);
  margin-top: clamp(2rem, 4vw, 3.2rem); padding-top: 1.4rem; border-top: var(--rule);
  justify-content: start;
}
.hero-meta dt { font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.hero-meta dd { font-family: var(--display); font-size: 1.5rem; color: var(--ink); line-height: 1.1; margin-top: .35rem; }

/* ledger — the waybill panel that replaces a hero photograph */
.ledger { border-top: 2px solid var(--ink); }
.ledger .ledger-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: .7rem 0 .9rem; border-bottom: var(--rule);
  font-family: var(--mono); font-size: .625rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted);
}
.ledger .row {
  display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: 1rem; padding: .9rem 0; border-bottom: var(--rule); align-items: baseline;
}
.ledger dt { font-family: var(--mono); font-size: .625rem; letter-spacing: .15em; text-transform: uppercase; color: var(--muted); }
.ledger dd { font-size: var(--step--1); color: var(--ink-soft); }
.ledger dd em { color: var(--kiln); font-style: normal; }
.ledger .foot { padding-top: .9rem; font-family: var(--mono); font-size: .625rem; letter-spacing: .15em; text-transform: uppercase; color: var(--muted); }

/* ---------- rail (static, hairline) ---------- */
.rail { border-bottom: var(--rule); background: var(--paper-2); overflow: hidden; }
.rail .wrap { display: flex; align-items: center; justify-content: space-between; gap: clamp(1rem, 2.4vw, 2.4rem); min-height: 52px; flex-wrap: wrap; row-gap: .4rem; }
.rail span { font-family: var(--mono); font-size: .6875rem; letter-spacing: .15em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.rail span.dot::before { content: "◆"; font-size: .5rem; color: var(--kiln); margin-right: .9em; vertical-align: middle; }

/* ---------- section head ---------- */
.shead { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(20px, 4vw, 64px); align-items: end; margin-bottom: clamp(2rem, 4vw, 3.6rem); }
.shead .lead { justify-self: end; max-width: 44ch; }
.shead h2 { margin-top: .9rem; }

/* ---------- numbered index ---------- */
.index-list { border-top: var(--rule); }
.index-row {
  display: grid; grid-template-columns: 56px minmax(0, 1.08fr) minmax(0, 1fr) 40px;
  gap: clamp(16px, 3vw, 44px); align-items: center;
  padding-block: clamp(26px, 3.2vw, 44px); border-bottom: var(--rule);
  transition: background .4s var(--ease);
}
a.index-row:hover { background: var(--paper-2); }
.index-row .num { font-family: var(--mono); font-size: .75rem; color: var(--kiln); letter-spacing: .1em; align-self: start; padding-top: .55rem; }
.index-row h3 { font-size: clamp(1.55rem, 1.2rem + 1.3vw, 2.4rem); }
.index-row .desc { color: var(--body); max-width: 46ch; }
.index-row .arrow { justify-self: end; font-size: 1.4rem; color: var(--kiln); transition: transform .35s var(--ease); }
a.index-row:hover .arrow { transform: translateX(6px); }
.index-row .meta { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: .7rem; }
.index-row .meta span { font-family: var(--mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line); padding: .28rem .55rem; }

/* ---------- category cards (text only) ---------- */
.cats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: var(--rule); }
.cat { padding: clamp(22px, 2.6vw, 34px) clamp(16px, 2vw, 30px) clamp(26px, 3vw, 40px) 0; border-bottom: var(--rule); }
.cat:nth-child(3n+2), .cat:nth-child(3n) { padding-left: clamp(16px, 2vw, 30px); border-left: var(--rule); }
.cat .n { font-family: var(--mono); font-size: .625rem; letter-spacing: .18em; color: var(--kiln); }
.cat h4 { margin: .9rem 0 .7rem; font-size: 1.35rem; }
.cat p { font-size: var(--step--1); color: var(--body); }
.cat ul { margin-top: .9rem; display: grid; gap: .3rem; }
.cat li { font-family: var(--mono); font-size: .625rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

/* ---------- route / process ---------- */
.route { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border-top: var(--rule); }
.route-step { padding: clamp(20px, 2.2vw, 30px) clamp(14px, 1.6vw, 24px) clamp(24px, 3vw, 40px) 0; border-right: var(--rule); position: relative; }
.route-step:last-child { border-right: 0; }
.route-step::before { content: ""; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; background: var(--kiln); }
.route-step .n { font-family: var(--mono); font-size: .625rem; letter-spacing: .18em; color: var(--muted); }
.route-step h4 { margin: 1.1rem 0 .7rem; font-size: 1.2rem; }
.route-step p { font-size: var(--step--1); color: var(--body); }

/* ---------- two-column text ---------- */
.duo { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 80px); align-items: start; }
.duo--wide { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }

/* ---------- dark band ---------- */
.band { background: var(--canopy); color: var(--on-dark); }
.band.section { padding-block: clamp(56px, 7vw, 112px); }
.band h2, .band h3, .band h4 { color: var(--on-dark); }
.band .eyebrow { color: var(--gold); }
.band p { color: var(--on-dark-60); }
.band .lead { color: var(--on-dark-60); }
.band .btn { border-color: rgba(239,233,220,.45); color: var(--on-dark); }
.band .btn:hover { background: var(--on-dark); color: var(--canopy); border-color: var(--on-dark); }
.band .btn--kiln { background: var(--kiln); border-color: var(--kiln); color: #fff; }
.band .btn--kiln:hover { background: var(--on-dark); color: var(--canopy); }

/* ---------- fact grid ---------- */
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(18px, 2.4vw, 40px); }
.fact { border-top: 1px solid rgba(239,233,220,.22); padding-top: 1.1rem; }
.fact dt { font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--on-dark-60); }
.fact dd { font-family: var(--display); font-size: 1.55rem; line-height: 1.15; margin-top: .5rem; }
.fact dd p { font-family: var(--sans); font-size: var(--step--1); line-height: 1.6; margin-top: .6rem; color: var(--on-dark-60); }

/* ---------- spec table ---------- */
.spec { width: 100%; border-collapse: collapse; font-size: var(--step--1); }
.spec caption { text-align: left; font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); padding-bottom: .9rem; }
.spec th, .spec td { text-align: left; padding: .95rem 1rem .95rem 0; border-bottom: var(--rule); vertical-align: top; }
.spec th { font-family: var(--mono); font-size: .6875rem; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-soft); font-weight: 400; width: 34%; }
.spec td { color: var(--body); }

/* ---------- numbered steps (long form) ---------- */
.steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 3vw, 46px) clamp(24px, 4vw, 64px); border-top: var(--rule); padding-top: clamp(24px, 3vw, 40px); }
.step { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 1rem; }
.step .n { font-family: var(--mono); font-size: .6875rem; letter-spacing: .14em; color: var(--kiln); padding-top: .35rem; }
.step h4 { margin-bottom: .5rem; font-family: var(--display); font-size: 1.4rem; }
.step p { font-size: var(--step--1); max-width: 44ch; }
.step p + p { margin-top: .7rem; }

/* ---------- checklist ---------- */
.checklist { display: grid; gap: .1rem; }
.checklist li { display: grid; grid-template-columns: 22px 1fr; gap: .6rem; padding-block: .7rem; border-bottom: 1px solid rgba(239,233,220,.14); font-size: var(--step--1); color: var(--on-dark-60); }
.checklist li::before { content: "▪"; color: var(--gold); font-size: .7rem; line-height: 1.9; }

/* ---------- faq ---------- */
.faq { border-top: var(--rule); }
.faq details { border-bottom: var(--rule); }
.faq summary {
  display: flex; justify-content: space-between; gap: 1.5rem; align-items: baseline;
  padding: 1.25rem 0; cursor: pointer; list-style: none;
  font-family: var(--display); font-size: clamp(1.2rem, 1.05rem + .5vw, 1.5rem); color: var(--ink);
  line-height: 1.2;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); font-size: 1.1rem; color: var(--kiln); }
.faq details[open] summary::after { content: "–"; }
.faq .a { padding-bottom: 1.4rem; max-width: 68ch; color: var(--body); font-size: var(--step--1); }
.faq .a p + p { margin-top: .8rem; }

/* ---------- cards ---------- */
.card { border-top: var(--rule); padding-top: 1.2rem; }
.card h4 { margin-bottom: .55rem; }
.card p { font-size: var(--step--1); color: var(--body); }
.card .mono { display: block; margin-bottom: .9rem; }

/* ---------- quote band ---------- */
.quote { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(24px, 5vw, 72px); align-items: center; }
.quote h2 { font-size: var(--step-3); max-width: 22ch; }
.quote .side { display: grid; gap: 1rem; }

/* ---------- page header (inner pages) ---------- */
.phead { padding-block: clamp(44px, 6vw, 96px) clamp(28px, 4vw, 56px); border-bottom: var(--rule); }
.phead .crumbs { font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.6rem; }
.phead .crumbs a:hover { color: var(--kiln); }
.phead h1 { font-size: var(--step-4); max-width: 22ch; }
.phead .intro { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: clamp(20px,4vw,64px); margin-top: 1.8rem; align-items: end; }
.phead .intro p { max-width: 46ch; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: clamp(32px, 5vw, 80px); }
.person { border-top: var(--rule); padding-block: 1.4rem; display: grid; gap: .35rem; }
.person .role { font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.person .name { font-family: var(--display); font-size: 1.6rem; color: var(--ink); line-height: 1.1; }
.person a { font-family: var(--mono); font-size: .8125rem; color: var(--ink-soft); }
.person a:hover { color: var(--kiln); }

.form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .4rem; }
.field label { font-family: var(--mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.field input, .field textarea, .field select {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--line);
  padding: .7rem 0; font-size: var(--step-0); color: var(--ink); border-radius: 0;
  transition: border-color .3s var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--kiln); }
.field textarea { min-height: 120px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.form .hint { font-size: var(--step--1); color: var(--muted); }
.form-status { font-family: var(--mono); font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase; color: var(--kiln); min-height: 1.2em; }

/* ---------- footer ---------- */
.footer { background: var(--canopy); color: var(--on-dark-60); padding-block: clamp(48px, 6vw, 84px) 2rem; }
.footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: clamp(24px, 4vw, 56px); }
.footer .wordmark .mark { color: var(--on-dark); }
.footer .wordmark .mark span { color: var(--gold); }
.footer .wordmark .sub { color: var(--on-dark-60); }
.footer h5 { font-family: var(--mono); font-size: .625rem; letter-spacing: .18em; text-transform: uppercase; color: var(--on-dark); font-weight: 400; margin-bottom: 1rem; }
.footer ul { display: grid; gap: .5rem; font-size: var(--step--1); }
.footer a:hover { color: var(--on-dark); }
.footer .colophon {
  grid-column: 1 / -1; margin-top: clamp(32px, 4vw, 56px); padding-top: 1.2rem;
  border-top: 1px solid rgba(239,233,220,.16);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--mono); font-size: .625rem; letter-spacing: .13em; text-transform: uppercase;
}
.footer .about { font-size: var(--step--1); max-width: 34ch; margin-top: 1rem; }

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }

/* ---------- utilities ---------- */
.center { text-align: center; }
.mt-2 { margin-top: 2rem; } .mt-3 { margin-top: 3rem; }
.maxw-56 { max-width: 56ch; }
.small { font-size: var(--step--1); color: var(--muted); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 999; background: var(--ink); color: var(--paper); padding: .7rem 1rem; font-family: var(--mono); font-size: .75rem; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .hero-grid, .duo, .quote, .contact-grid, .phead .intro, .shead { grid-template-columns: minmax(0, 1fr); }
  .shead .lead { justify-self: start; }
  .route { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .route-step:nth-child(2n) { border-right: 0; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cat, .cat:nth-child(3n+2), .cat:nth-child(3n) { padding-left: 0; border-left: 0; }
  .cat:nth-child(2n) { padding-left: clamp(16px, 2vw, 30px); border-left: var(--rule); }
  .footer .wrap { grid-template-columns: 1fr 1fr; }
  .index-row { grid-template-columns: 40px minmax(0, .9fr) minmax(0, 1.1fr) 32px; }
}
@media (max-width: 860px) {
  .nav { display: none; }
  .masthead .cta { display: none; }
  .nav-toggle {
    display: inline-flex; align-items: center; gap: .5rem; margin-left: auto;
    font-family: var(--mono); font-size: .6875rem; letter-spacing: .16em; text-transform: uppercase;
    border: 1px solid var(--line); padding: .6rem .8rem; min-height: 44px;
  }
  .nav-open .nav {
    display: grid; position: fixed; inset: 76px 0 auto 0; z-index: 99;
    background: var(--paper); border-bottom: var(--rule); padding: 1.4rem var(--gutter) 2rem; gap: .2rem;
  }
  .nav-open .nav a { padding: .85rem 0; border-bottom: var(--rule); font-size: .8125rem; }
  .nav-open .nav a::after { display: none; }
  .hero h1 { font-size: clamp(2.3rem, 8.6vw, 3.4rem); }
  .index-row { grid-template-columns: 32px minmax(0, 1fr) 28px; }
  .index-row .desc { grid-column: 2 / 4; }
  .index-row .arrow { grid-column: 3; grid-row: 1; align-self: start; }
  .index-row .meta span { font-size: .5625rem; padding: .22rem .45rem; }
  .hero-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem 1.6rem; }
  .hero-meta dd { font-size: 1.25rem; }
  .cols-2, .cols-3, .cols-4, .facts, .route, .cats, .steps { grid-template-columns: minmax(0, 1fr); }
  .route-step { border-right: 0; border-bottom: var(--rule); padding-right: 0; }
  .cat, .cat:nth-child(2n) { padding-left: 0; border-left: 0; }
  .field-row { grid-template-columns: 1fr; }
  .quote h2 { font-size: var(--step-2); }
  .rail .wrap { justify-content: flex-start; gap: .7rem 1.5rem; padding-block: .9rem; }
  .footer .wrap { grid-template-columns: 1fr; }
  .corrugation { height: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- print ---------- */
@media print {
  .strip, .masthead, .rail, .footer, .btn { display: none; }
  body { background: #fff; color: #000; }
  .band { background: #fff; color: #000; }
}