:root {
  --paper: #f3f0e8;
  --paper-deep: #e8e3d7;
  --ink: #171817;
  --muted: #686964;
  --red: #c72d25;
  --blue: #62798a;
  --line: #272927;
  --hair: #c7c3b9;
  --white: #fbfaf6;
  --mono: "IBM Plex Mono", monospace;
  --condensed: "Roboto Condensed", sans-serif;
  --slab: "Roboto Slab", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--condensed); font-size: 17px; line-height: 1.5; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button, select { cursor: pointer; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--slab); }
h2 { max-width: 780px; margin-bottom: 0; font-size: clamp(35px, 5vw, 66px); line-height: 1.02; letter-spacing: -.045em; }
h3 { line-height: 1.18; }
.skip-link { position: fixed; z-index: 1000; top: -70px; left: 15px; padding: 11px 16px; color: #fff; background: var(--red); }
.skip-link:focus { top: 15px; }
.sheet-label { margin: 0 0 14px; font: 600 11px/1.3 var(--mono); letter-spacing: .11em; text-transform: uppercase; }
.part-no, .module-number { color: var(--red); font: 600 clamp(58px, 8vw, 116px)/.82 var(--mono); letter-spacing: -.1em; }
.section { position: relative; padding: 112px max(5vw, 24px); border-top: 2px solid var(--line); scroll-margin-top: 75px; }
.section-heading { display: grid; grid-template-columns: 130px minmax(0, 1.2fr) minmax(250px, .65fr); gap: 42px; align-items: start; margin-bottom: 68px; }
.section-heading > p { margin-top: 33px; color: var(--muted); }
.section-heading.compact { grid-template-columns: 130px 1fr .65fr; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; height: 74px; padding: 0 max(3vw, 20px); display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: 30px; border-bottom: 2px solid var(--line); background: rgba(243, 240, 232, .95); backdrop-filter: blur(12px); }
.header-code { align-self: stretch; padding: 28px 18px 0 0; border-right: 1px solid var(--hair); font: 10px var(--mono); color: var(--muted); }
.brand { display: flex; align-items: center; gap: 12px; width: max-content; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; border: 2px solid var(--ink); font: 700 16px var(--slab); transform: rotate(-3deg); }
.brand-mark span { color: var(--red); }
.brand strong, .brand small { display: block; }
.brand strong { font: 700 15px var(--condensed); letter-spacing: .04em; }
.brand small { font: 9px var(--mono); color: var(--muted); }
.desktop-nav { display: flex; align-items: stretch; justify-content: center; height: 100%; }
.desktop-nav a { position: relative; display: grid; place-items: center; padding: 0 15px; font: 600 12px var(--condensed); text-transform: uppercase; }
.desktop-nav a::after { content: ""; position: absolute; inset: auto 15px -2px; height: 4px; background: var(--red); transform: scaleX(0); transition: .2s; }
.desktop-nav a:hover::after, .desktop-nav a.active::after { transform: scaleX(1); }
.header-actions { display: flex; gap: 12px; align-items: center; }
.lang-switch { display: flex; border: 1px solid var(--ink); }
.lang-btn { width: 38px; height: 30px; border: 0; background: transparent; font: 600 10px var(--mono); }
.lang-btn.active { color: #fff; background: var(--ink); }
.menu-toggle { display: none; width: 40px; height: 34px; border: 1px solid var(--ink); background: transparent; }
.menu-toggle span { display: block; width: 19px; height: 1px; margin: 4px auto; background: var(--ink); transition: .2s; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-5px) rotate(-45deg); }
.mobile-menu { position: fixed; inset: 74px 0 0; z-index: 99; padding: 30px 24px; background: var(--paper); }
.mobile-menu a { display: block; padding: 18px 4px; border-bottom: 1px solid var(--hair); font: 600 20px var(--slab); }

/* Hero */
.hero { min-height: calc(100vh - 74px); padding: 72px max(5vw, 24px) 52px; display: grid; grid-template-columns: 1.02fr .98fr; gap: 6vw; align-items: center; background-image: linear-gradient(90deg, transparent 49.9%, rgba(39,41,39,.08) 50%, transparent 50.1%); }
.hero-copy h1 { margin: 0 0 26px; font-size: clamp(48px, 6.5vw, 96px); line-height: .91; letter-spacing: -.06em; }
.hero-copy h1 em { display: block; margin-top: 24px; color: var(--red); font: 500 clamp(36px, 5.5vw, 76px)/1 var(--mono); font-style: normal; letter-spacing: -.08em; }
.hero-lead { max-width: 760px; color: #50524f; font-size: clamp(18px, 1.5vw, 23px); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin: 34px 0 40px; }
.button { min-height: 52px; padding: 0 24px; display: inline-flex; align-items: center; justify-content: center; border: 2px solid var(--ink); background: transparent; font: 700 12px var(--mono); letter-spacing: .03em; text-transform: uppercase; transition: .2s; }
.button.primary { color: #fff; border-color: var(--red); background: var(--red); }
.button:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--ink); }
.mail-prominent { padding-bottom: 3px; border-bottom: 2px solid var(--ink); font: 600 18px var(--mono); }
.hero-data { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; border-block: 1px solid var(--ink); }
.hero-data div { padding: 14px 16px; border-right: 1px solid var(--ink); }
.hero-data div:last-child { border: 0; }
.hero-data dt { color: var(--muted); font: 9px var(--mono); text-transform: uppercase; }
.hero-data dd { margin: 4px 0 0; font: 600 13px var(--mono); }
.exploded-sheet { border: 2px solid var(--ink); background: var(--white); box-shadow: 16px 16px 0 var(--paper-deep); }
.drawing-head { height: 47px; padding: 0 16px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--ink); font: 600 10px var(--mono); }
.drawing-head b { color: var(--red); }
.machine-drawing { position: relative; height: min(52vw, 540px); min-height: 390px; overflow: hidden; background-image: linear-gradient(rgba(98,121,138,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(98,121,138,.12) 1px, transparent 1px); background-size: 30px 30px; }
.machine-drawing .axis { position: absolute; left: 10%; right: 9%; top: 50%; height: 1px; background: var(--red); }
.part { position: absolute; top: 50%; transform: translateY(-50%); display: grid; place-items: center; color: var(--red); border: 3px solid var(--ink); background: var(--paper); }
.part span { position: absolute; top: -31px; font: 600 12px var(--mono); }
.part-a { left: 10%; width: 25%; height: 150px; clip-path: polygon(0 18%, 80% 18%, 100% 0, 100% 100%, 80% 82%, 0 82%); }
.part-a::after { content: ""; width: 45%; height: 47%; border: 2px solid var(--ink); border-radius: 50%; }
.part-b { left: 43%; width: 24%; height: 48px; background: repeating-linear-gradient(90deg, var(--paper) 0 12px, #d8d5cd 12px 15px); }
.part-c { left: 70%; width: 11%; aspect-ratio: 1; border-radius: 50%; box-shadow: inset 0 0 0 15px var(--paper-deep); }
.part-d { left: 86%; width: 8%; height: 105px; border-radius: 4px 22px 22px 4px; }
.leader { position: absolute; border: solid var(--blue); border-width: 1px 0 0 1px; }
.l1 { left: 15%; top: 18%; width: 12%; height: 18%; }.l2 { left: 51%; top: 66%; width: 12%; height: 17%; }.l3 { right: 12%; top: 17%; width: 9%; height: 24%; }
.callout { position: absolute; padding: 3px 5px; color: var(--blue); background: var(--white); font: 500 9px var(--mono); }
.c1 { left: 8%; top: 15%; }.c2 { left: 48%; bottom: 14%; }.c3 { right: 22%; top: 14%; }.c4 { right: 5%; bottom: 17%; }
.exploded-sheet > p { margin: 0; padding: 15px 17px; border-top: 1px solid var(--ink); color: var(--muted); font: 10px var(--mono); }

.scope-band { min-height: 165px; padding: 28px max(5vw, 24px); display: grid; grid-template-columns: 130px 1fr; gap: 40px; align-items: center; color: #fff; background: var(--ink); }
.scope-band .part-no { color: var(--red); }
.scope-band p:last-child { max-width: 1100px; margin: 0; color: #d0d0ca; font-size: 16px; }

/* Activities */
.parts-list { border-top: 2px solid var(--ink); }
.parts-list article { display: grid; grid-template-columns: 170px 1fr 55px; align-items: center; min-height: 145px; border-bottom: 1px solid var(--ink); transition: background .2s; }
.parts-list article:hover { background: var(--white); }
.parts-list article > b { padding: 20px; color: var(--blue); font: 500 clamp(30px, 4vw, 56px) var(--mono); letter-spacing: -.08em; }
.parts-list article > div { align-self: stretch; padding: 24px 28px; border-inline: 1px solid var(--ink); }
.parts-list article span { color: var(--red); font: 600 9px var(--mono); }
.parts-list h3 { margin: 2px 0 5px; font-size: 23px; }
.parts-list p { margin: 0; color: var(--muted); font-size: 15px; }
.parts-list a { height: 100%; display: grid; place-items: center; font: 28px var(--mono); }
.parts-list .primary-row { background: #eee8dc; }
.parts-list .primary-row > b { color: var(--red); }

.manual-module { display: grid; grid-template-columns: 150px 1.1fr .7fr; gap: 55px; background: var(--white); }
.manual-module.reverse { background: var(--paper-deep); }
.module-copy > p:not(.sheet-label) { max-width: 750px; color: var(--muted); font-size: 19px; }
.manual-list { list-style: none; padding: 0; margin: 35px 0 0; border-top: 1px solid var(--ink); }
.manual-list li { position: relative; padding: 13px 10px 13px 30px; border-bottom: 1px solid var(--hair); }
.manual-list li::before { content: "■"; position: absolute; left: 4px; top: 16px; color: var(--red); font-size: 9px; }
.diagnostic-sheet { align-self: center; padding: 22px; border: 1px solid var(--ink); background: var(--paper); transform: rotate(1deg); box-shadow: 9px 9px 0 #d2cec4; }
.diagnostic-sheet > span { color: var(--red); font: 600 11px var(--mono); }
.diagnostic-sheet h3 { font-size: 25px; }
.diagnostic-sheet div { padding: 15px 0; border-top: 1px solid var(--hair); }
.diagnostic-sheet div b { font: 600 9px var(--mono); color: var(--blue); }
.diagnostic-sheet div:last-child b { color: var(--red); }
.diagnostic-sheet p { margin: 5px 0 0; font-size: 14px; }
.spec-lines { margin: 32px 0 0; }
.spec-lines div { display: grid; grid-template-columns: 50px 1fr; border-top: 1px solid var(--hair); padding: 12px 0; }
.spec-lines dt { color: var(--red); font: 600 11px var(--mono); }
.spec-lines dd { margin: 0; }
.plate-visual { display: grid; place-items: center; min-height: 430px; }
.plate { position: relative; width: min(100%, 370px); padding: 45px 35px; border: 5px double var(--ink); background: #b9c3c7; box-shadow: 14px 14px 0 rgba(23,24,23,.13); transform: rotate(-2deg); }
.plate i { position: absolute; width: 12px; height: 12px; border-radius: 50%; background: var(--ink); box-shadow: inset 0 0 0 3px #909da2; }
.plate i:first-child { left: 12px; top: 12px; }.plate i:nth-child(2) { right: 12px; bottom: 12px; }
.plate span, .plate small { display: block; font: 600 10px var(--mono); }
.plate b { display: block; margin: 18px 0; font: 600 55px var(--mono); letter-spacing: -.08em; }

.twin-module { padding-left: max(5vw, 24px); padding-right: max(5vw, 24px); background: var(--paper); }
.twin-module.steel { color: #f8f6f0; background: var(--blue); }
.twin-module header { display: grid; grid-template-columns: 150px 1fr; gap: 55px; margin-bottom: 52px; }
.twin-module.steel .module-number { color: #ffdad6; }
.twin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8vw; margin-left: 205px; }
.twin-grid > p { font-size: 21px; }
.check-block { border-top: 3px solid currentColor; }
.check-block > b { display: block; padding: 11px 0; font: 600 10px var(--mono); }
.check-block ul { list-style: square; padding-left: 22px; }
.check-block li { padding: 7px 0; border-top: 1px solid rgba(104,105,100,.4); }

.assembly-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--ink); }
.assembly-steps li { min-height: 300px; padding: 24px; border-right: 1px solid var(--ink); }
.assembly-steps li:last-child { border: 0; }
.assembly-steps li > span { display: block; margin-bottom: 80px; color: var(--red); font: 500 36px var(--mono); }
.assembly-steps h3 { font-size: 21px; }
.assembly-steps p { color: var(--muted); font-size: 15px; }

.retail { display: grid; grid-template-columns: .9fr 1.1fr; gap: 8vw; color: #fff; background: var(--ink); }
.retail .module-number { display: block; margin-bottom: 35px; }
.retail-copy { align-self: end; }
.retail-copy > p { color: #cbcbc5; font-size: 20px; }
.retail-fields { border-top: 1px solid #666; }
.retail-fields span { display: block; padding: 12px 5px; border-bottom: 1px solid #4b4c49; font-family: var(--mono); font-size: 12px; }
.retail-fields span::before { content: "+ "; color: var(--red); }

.warning-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.warning-grid article { padding: 25px; border-top: 5px solid var(--red); background: var(--white); }
.warning-grid article > b { display: grid; place-items: center; width: 38px; height: 38px; color: #fff; background: var(--red); font: 600 20px var(--mono); }
.warning-grid h3 { margin-top: 40px; }
.warning-grid p { color: var(--muted); font-size: 15px; }

.identification { background: var(--white); }
.id-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 8vw; align-items: center; margin-left: 170px; }
.id-tag { position: relative; max-width: 480px; padding: 37px; border: 4px double var(--ink); background: #d7dad8; box-shadow: 13px 13px 0 #e8e4da; }
.id-tag span, .id-tag b, .id-tag small { display: block; font-family: var(--mono); }
.id-tag span { font-size: 10px; }.id-tag b { margin: 25px 0; font-size: 28px; }.id-tag small { border-top: 1px solid; padding-top: 14px; }
.id-tag i { position: absolute; right: 25px; top: 20px; color: var(--red); }
.id-notes article { display: grid; grid-template-columns: 55px 1fr; border-top: 1px solid var(--ink); padding: 13px 0; }
.id-notes article:last-child { border-bottom: 1px solid var(--ink); }
.id-notes b { color: var(--red); font: 600 11px var(--mono); }.id-notes p { margin: 0; }

.documents { background: var(--paper-deep); }
.document-index { display: grid; grid-template-columns: repeat(4, 1fr); }
.document-index article { padding: 27px; border: solid var(--ink); border-width: 1px 1px 1px 0; }
.document-index article:first-child { border-left-width: 1px; }
.document-index span { display: block; margin-bottom: 65px; color: var(--blue); font: 500 45px var(--mono); }
.document-index h3 { font-size: 20px; }
.document-index p { color: var(--muted); font-size: 14px; }

.process-line { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); }
.process-line li { position: relative; padding: 0 22px 30px; border-top: 4px solid var(--ink); }
.process-line li::before { content: ""; position: absolute; top: -9px; left: 22px; width: 14px; height: 14px; background: var(--red); border: 2px solid var(--paper); outline: 1px solid var(--ink); }
.process-line b { display: block; margin: 22px 0 50px; color: var(--red); font: 600 11px var(--mono); }
.process-line h3 { font-size: 19px; }
.process-line p { color: var(--muted); font-size: 14px; }

/* Builder */
.builder { background: var(--white); }
.builder-layout { display: grid; grid-template-columns: 1.2fr .8fr; border: 2px solid var(--ink); }
.builder-form { padding: 32px; }
.builder-form fieldset { padding: 0; margin: 0 0 27px; border: 0; }
.builder-form legend, .field > span { display: block; margin-bottom: 10px; font: 600 11px var(--mono); text-transform: uppercase; }
.builder-form legend b, .field > span > b { margin-right: 10px; color: var(--red); }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.choice-grid label { position: relative; min-height: 70px; display: flex; align-items: center; padding: 12px; border: 1px solid var(--hair); cursor: pointer; }
.choice-grid input { position: absolute; opacity: 0; }
.choice-grid label:has(input:checked) { color: #fff; border-color: var(--blue); background: var(--blue); }
.choice-grid span { font-size: 14px; font-weight: 600; }
.field { display: block; margin: 18px 0; }
.field input, .field textarea, .contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 13px 14px; border: 1px solid var(--ink); border-radius: 0; outline: none; background: var(--paper); }
.field input:focus, .field textarea:focus, .contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { box-shadow: 0 0 0 3px rgba(199,45,37,.15); border-color: var(--red); }
.builder-output { display: flex; flex-direction: column; min-width: 0; border-left: 2px solid var(--ink); background: var(--paper-deep); }
.output-head { padding: 17px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--ink); font: 600 10px var(--mono); }
.output-head b { color: var(--red); }
.builder-output pre { flex: 1; min-height: 450px; margin: 0; padding: 25px; white-space: pre-wrap; overflow-wrap: anywhere; font: 12px/1.65 var(--mono); }
.output-actions { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); }
.output-actions button, .output-actions a { min-height: 50px; display: grid; place-items: center; border: 0; background: transparent; font: 600 11px var(--mono); }
.output-actions button { border-right: 1px solid var(--ink); }
.output-actions button:not(:disabled):hover, .output-actions a:not(.disabled):hover { color: #fff; background: var(--red); }
.output-actions :disabled, .output-actions .disabled { opacity: .4; cursor: not-allowed; }
.builder-output > p { margin: 0; padding: 16px; border-top: 1px solid var(--ink); color: var(--muted); font-size: 12px; }

.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--ink); border: 1px solid var(--ink); }
.case-grid article { min-height: 220px; padding: 28px; background: var(--paper); }
.case-grid b { color: var(--red); font: 600 11px var(--mono); }
.case-grid h3 { max-width: 450px; margin-top: 50px; font-size: 22px; }
.case-grid p { color: var(--muted); }

.registry { background: var(--paper-deep); }
.registry-sheet { position: relative; padding: 34px; border: 2px solid var(--ink); background: var(--white); }
.registry-sheet dl { margin: 0; max-width: 920px; }
.registry-sheet dl div { display: grid; grid-template-columns: 250px 1fr; gap: 25px; padding: 12px 0; border-bottom: 1px solid var(--hair); }
.registry-sheet dt { font: 500 10px var(--mono); color: var(--muted); text-transform: uppercase; }
.registry-sheet dd { margin: 0; font-weight: 600; }
.registry-stamp { position: absolute; right: 4%; bottom: 8%; width: 215px; padding: 20px; border: 4px double var(--red); color: var(--red); text-align: center; transform: rotate(-5deg); }
.registry-stamp span, .registry-stamp b, .registry-stamp small { display: block; font-family: var(--mono); }
.registry-stamp span { font-size: 10px; }.registry-stamp b { font-size: 25px; }.registry-stamp small { font-size: 10px; }

.people-grid { display: grid; grid-template-columns: repeat(2, 1fr); border: 1px solid var(--ink); }
.people-grid article { min-height: 215px; padding: 26px; border: solid var(--ink); border-width: 0 1px 1px 0; }
.people-grid article:nth-child(even) { border-right: 0; }.people-grid article:nth-last-child(-n+2) { border-bottom: 0; }
.people-grid span { color: var(--blue); font: 600 9px var(--mono); }
.people-grid h3 { margin: 45px 0 10px; font-size: 23px; }
.people-grid p { color: var(--muted); }.people-grid article > b { color: var(--red); font: 500 38px var(--mono); }

.faq { background: var(--white); }
.faq-list { margin-left: 170px; border-top: 2px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--ink); }
.faq-list summary { position: relative; padding: 22px 55px 22px 8px; list-style: none; font: 600 20px var(--slab); cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 15px; color: var(--red); font: 500 28px var(--mono); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 850px; padding: 0 8px 22px; color: var(--muted); }

.contact { display: grid; grid-template-columns: .9fr 1.1fr; gap: 8vw; color: #fff; background: var(--blue); }
.contact .part-no { color: #ffd5d1; }
.contact-email { display: inline-block; margin: 28px 0; border-bottom: 2px solid; font: 600 clamp(21px, 2.5vw, 35px) var(--mono); }
.contact-copy > p:not(.sheet-label) { max-width: 620px; color: #e0e5e6; }
.contact address { margin-top: 38px; color: #d8dfe1; font-style: normal; font-size: 14px; }
.contact-form { align-self: start; padding: 30px; color: var(--ink); background: var(--paper); border: 2px solid var(--ink); box-shadow: 12px 12px 0 rgba(23,24,23,.3); }
.contact-form label:not(.consent) { display: block; margin-bottom: 17px; }
.contact-form label > span { display: block; margin-bottom: 7px; font: 600 10px var(--mono); text-transform: uppercase; }
.contact-form .consent { display: grid; grid-template-columns: 20px 1fr; gap: 10px; margin: 17px 0; }
.contact-form .consent span { text-transform: none; }
.form-status { min-height: 24px; margin: 14px 0 0; color: var(--red); font: 600 11px var(--mono); }

footer { padding: 32px max(5vw, 24px); display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 40px; border-top: 2px solid var(--ink); background: var(--paper); }
footer strong, footer span { display: block; }
footer strong { font-family: var(--slab); }
footer span, footer p, footer a { color: var(--muted); font-size: 12px; }
footer p { margin: 0; }
footer a { border-bottom: 1px solid; font-family: var(--mono); }

@media (max-width: 1080px) {
  .header-code { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
  .desktop-nav { display: none; }
  .menu-toggle { display: block; }
  .hero { grid-template-columns: 1fr; }
  .machine-drawing { height: 520px; }
  .section-heading, .section-heading.compact { grid-template-columns: 100px 1fr; }
  .section-heading > p { grid-column: 2; margin-top: -20px; }
  .manual-module { grid-template-columns: 100px 1fr; }
  .manual-module > :last-child { grid-column: 2; }
  .twin-grid { margin-left: 155px; }
  .assembly-steps { grid-template-columns: repeat(2, 1fr); }
  .assembly-steps li:nth-child(2) { border-right: 0; }.assembly-steps li:nth-child(-n+2) { border-bottom: 1px solid; }
  .warning-grid { grid-template-columns: repeat(2, 1fr); }
  .document-index { grid-template-columns: repeat(2, 1fr); }
  .process-line { grid-template-columns: repeat(3, 1fr); row-gap: 25px; }
  .builder-layout { grid-template-columns: 1fr; }
  .builder-output { border: solid var(--ink); border-width: 2px 0 0; }
  .registry-sheet dl { max-width: none; padding-bottom: 145px; }
  .registry-stamp { bottom: 25px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .site-header { height: 66px; padding-inline: 14px; }
  .brand-mark { width: 34px; height: 34px; }
  .brand strong { font-size: 13px; }
  .mobile-menu { top: 66px; }
  .section { padding: 76px 20px; }
  .section-heading, .section-heading.compact { grid-template-columns: 1fr; gap: 24px; margin-bottom: 42px; }
  .section-heading > p { grid-column: auto; margin: 0; }
  .section-heading .part-no { font-size: 60px; }
  .hero { padding: 58px 20px 38px; }
  .hero-copy h1 { font-size: clamp(45px, 15vw, 67px); }
  .hero-data { grid-template-columns: 1fr; }
  .hero-data div { border: 0; border-bottom: 1px solid; }
  .hero-data div:last-child { border: 0; }
  .machine-drawing { min-height: 330px; height: 85vw; }
  .part-a { left: 6%; }.part-b { left: 39%; }.part-c { left: 67%; }.part-d { left: 85%; }
  .scope-band { grid-template-columns: 70px 1fr; gap: 22px; }
  .scope-band .part-no { font-size: 55px; }
  .parts-list article { grid-template-columns: 1fr 42px; }
  .parts-list article > b { grid-column: 1 / -1; padding: 20px 15px 0; }
  .parts-list article > div { padding: 16px; border-left: 0; }
  .manual-module { grid-template-columns: 1fr; gap: 30px; }
  .manual-module > :last-child { grid-column: auto; }
  .twin-module header { grid-template-columns: 1fr; gap: 30px; }
  .twin-grid { grid-template-columns: 1fr; margin-left: 0; gap: 30px; }
  .assembly-steps, .warning-grid, .document-index, .process-line, .choice-grid, .case-grid, .people-grid { grid-template-columns: 1fr; }
  .assembly-steps li { border: 0; border-bottom: 1px solid !important; min-height: 230px; }
  .assembly-steps li:last-child { border-bottom: 0 !important; }
  .assembly-steps li > span { margin-bottom: 35px; }
  .retail, .contact { grid-template-columns: 1fr; }
  .id-layout { grid-template-columns: 1fr; margin-left: 0; }
  .document-index article { border-width: 0 1px 1px; }
  .document-index article:first-child { border-top-width: 1px; }
  .process-line { gap: 22px; }
  .builder-form { padding: 20px; }
  .builder-output pre { min-height: 350px; }
  .registry-sheet { padding: 20px; }
  .registry-sheet dl { padding-bottom: 130px; }
  .registry-sheet dl div { grid-template-columns: 1fr; gap: 4px; }
  .registry-stamp { left: 25px; right: auto; }
  .people-grid article { border-width: 0 0 1px; }
  .people-grid article:last-child { border-bottom: 0; }
  .faq-list { margin-left: 0; }
  .faq-list summary { font-size: 17px; }
  .contact-form { padding: 20px; box-shadow: 7px 7px 0 rgba(23,24,23,.3); }
  footer { grid-template-columns: 1fr; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}