:root {
  --ink: #111111;
  --ink-soft: #272727;
  --paper: #fffdfb;
  --surface: #f5f3f0;
  --line: #dedbd6;
  --muted: #66625d;
  --signal: #ff3b30;
  --signal-dark: #d92c24;
  --signal-strong: #b8211b;
  --signal-soft: #ffe5e2;
  --white: #ffffff;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow: 0 24px 70px rgba(17, 17, 17, .12);
  --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 400 16px/1.6 Inter, ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
::selection { color: var(--ink); background: var(--signal-soft); }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 4px; }

.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.section { padding: 120px 0; }
.section-compact { padding: 88px 0; }
.surface { background: var(--surface); }
.ink-section { color: var(--white); background: var(--ink); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--signal-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow::before { width: 22px; height: 2px; content: ""; background: currentColor; }
.ink-section .eyebrow { color: #ff7b73; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.05; letter-spacing: -.045em; }
h1 { max-width: 820px; margin-bottom: 28px; font-size: clamp(3.5rem, calc(2rem + 3.3vw), 6rem); font-weight: 800; }
h2 { max-width: 820px; margin-bottom: 28px; font-size: clamp(2.4rem, calc(1.7rem + 2.5vw), 4.5rem); font-weight: 750; }
h3 { margin-bottom: 16px; font-size: clamp(1.35rem, calc(1.1rem + .8vw), 2rem); }
.lead { max-width: 680px; color: var(--muted); font-size: clamp(1.05rem, calc(.95rem + .35vw), 1.3rem); }
.ink-section .lead { color: #bdb9b4; }
.signal { color: var(--signal-dark); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 26px;
  border: 1px solid var(--signal-dark);
  border-radius: 999px;
  color: var(--white);
  background: var(--signal-dark);
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.button::after { margin-left: 12px; content: "↗"; font-size: 18px; }
.button:hover { border-color: var(--signal-strong); background: var(--signal-strong); box-shadow: 0 12px 30px rgba(217,44,36,.24); transform: translateY(-2px); }
.button-secondary { color: var(--ink); border-color: var(--line); background: transparent; }
.button-secondary:hover { color: var(--white); border-color: var(--ink); background: var(--ink); }
.ink-section .button-secondary { color: var(--white); border-color: #76716c; }
.ink-section .button-secondary:hover { color: var(--ink); border-color: var(--white); background: var(--white); }
.button-small { min-height: 44px; padding-inline: 20px; font-size: 14px; }
.button-small::after { display: none; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(222,219,214,.8);
  background: rgba(255,253,251,.9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; min-height: 80px; align-items: center; gap: 32px; }
.brand { display: inline-flex; min-height: 44px; flex: 0 0 auto; align-items: center; }
.brand img { width: 176px; height: auto; }
.site-nav { display: flex; margin-left: auto; align-items: center; gap: 28px; }
.site-nav a { position: relative; padding: 28px 0; font-size: 14px; font-weight: 650; }
.site-nav a::after { position: absolute; right: 0; bottom: 20px; left: 0; height: 2px; content: ""; background: var(--signal); transform: scaleX(0); transform-origin: right; transition: transform .2s; }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; width: 48px; height: 48px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 20px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .2s; }

.hero { position: relative; overflow: hidden; padding: 100px 0 72px; }
.hero::before {
  position: absolute; inset: 0; content: ""; pointer-events: none;
  background-image: linear-gradient(rgba(17,17,17,.055) 1px, transparent 1px), linear-gradient(90deg, rgba(17,17,17,.055) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 84%);
  mask-image: linear-gradient(to bottom, #000, transparent 84%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 70px; }
.hero-copy { padding: 40px 0; }
.hero-copy h1 { font-size: clamp(3.8rem, calc(2rem + 3.5vw), 5.75rem); }
.hero-actions { display: flex; margin-top: 40px; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-proof { display: flex; margin-top: 56px; gap: 28px; color: var(--muted); font-size: 13px; font-weight: 650; }
.hero-proof span { display: flex; align-items: center; gap: 9px; }
.hero-proof span::before { width: 8px; height: 8px; content: ""; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 6px var(--signal-soft); }
.hero-visual { position: relative; }
.hero-visual::before { position: absolute; top: -24px; right: -24px; width: 42%; aspect-ratio: 1; content: ""; border-radius: 50%; background: var(--signal); filter: blur(1px); }
.hero-visual img { position: relative; width: 100%; height: clamp(560px, 70vh, 760px); border-radius: var(--radius-lg); box-shadow: var(--shadow); object-fit: cover; object-position: 68% center; }
.hero-tag { position: absolute; right: -18px; bottom: 28px; padding: 18px 22px; border: 1px solid rgba(255,255,255,.25); border-radius: var(--radius-md); color: var(--white); background: rgba(17,17,17,.9); box-shadow: var(--shadow); }
.hero-tag strong, .hero-tag span { display: block; }
.hero-tag strong { font-size: 20px; }
.hero-tag span { color: #bbb; font-size: 12px; }

.logo-strip { padding: 28px 0; border-block: 1px solid var(--line); }
.logo-strip-inner { display: grid; grid-template-columns: 1.3fr repeat(4, 1fr); align-items: center; gap: 28px; }
.logo-strip p { margin: 0; color: var(--muted); font-size: 13px; }
.logo-word { color: #8a8681; font-weight: 800; letter-spacing: -.03em; text-align: center; }

.section-head { display: flex; margin-bottom: 64px; align-items: end; justify-content: space-between; gap: 40px; }
.section-head > * { margin-bottom: 0; }
.service-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 20px; }
.service-card { position: relative; display: block; min-height: 330px; padding: 34px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); transition: border .2s, transform .2s, box-shadow .2s; }
.service-card:nth-child(1), .service-card:nth-child(4) { grid-column: span 7; }
.service-card:nth-child(2), .service-card:nth-child(3) { grid-column: span 5; }
.service-card:nth-child(5) { grid-column: span 12; min-height: 260px; }
.service-card:hover { border-color: var(--signal); box-shadow: 0 20px 50px rgba(17,17,17,.08); transform: translateY(-5px); }
.service-card:focus-visible { border-color: var(--signal-dark); outline-offset: 4px; }
.service-number { display: block; margin-bottom: 72px; color: var(--signal); font-size: 13px; font-weight: 800; }
.service-card p { max-width: 500px; margin: 0; color: var(--muted); }
.service-card .arrow { position: absolute; right: 28px; top: 28px; width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; font-size: 20px; }

.image-feature { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 80px; }
.image-feature.reverse .feature-image { order: 2; }
.feature-image { overflow: hidden; border-radius: var(--radius-lg); background: var(--surface); }
.feature-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.2,1); }
.feature-image:hover img { transform: scale(1.025); }
.feature-list { margin: 34px 0 0; padding: 0; list-style: none; }
.feature-list li { display: flex; padding: 16px 0; align-items: center; gap: 14px; border-top: 1px solid var(--line); font-weight: 650; }
.feature-list li::before { display: grid; width: 26px; height: 26px; flex: 0 0 26px; place-items: center; content: "✓"; border-radius: 50%; color: var(--white); background: var(--signal); font-size: 12px; }

.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; }
.process-step { position: relative; padding: 30px 30px 30px 0; border-top: 1px solid #444; }
.process-step::before { position: absolute; top: -5px; left: 0; width: 9px; height: 9px; content: ""; border-radius: 50%; background: var(--signal); }
.process-step span { display: block; margin-bottom: 50px; color: #ff7b73; font-size: 12px; font-weight: 800; }
.process-step p { color: #aaa; }

.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.case-card { min-height: 460px; padding: 42px; border-radius: var(--radius-lg); background: var(--surface); }
.case-card.dark { color: var(--white); background: var(--ink); }
.case-metric { margin: 60px 0 12px; color: var(--signal); font-size: clamp(4rem, 8vw, 7.5rem); font-weight: 800; line-height: .9; letter-spacing: -.07em; }
.case-metric-text { max-width: 500px; font-size: clamp(2.8rem, 5vw, 5.4rem); }
.case-card p { max-width: 500px; color: var(--muted); }
.case-card.dark p { color: #aaa; }

.results-hero { position: relative; overflow: hidden; padding: 112px 0 100px; border-bottom: 1px solid var(--line); }
.results-hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; background-image: linear-gradient(rgba(17,17,17,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(17,17,17,.045) 1px, transparent 1px); background-size: 64px 64px; -webkit-mask-image: linear-gradient(to bottom, #000, transparent 92%); mask-image: linear-gradient(to bottom, #000, transparent 92%); }
.results-hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 90px; }
.results-hero-grid h1 { max-width: 900px; }
.evidence-statement { padding: 38px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(255,253,251,.82); box-shadow: var(--shadow); }
.evidence-statement .evidence-index { display: block; margin-bottom: 54px; color: var(--signal-dark); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.evidence-statement p { display: flex; margin: 0; padding: 18px 0; align-items: center; gap: 14px; border-top: 1px solid var(--line); font-weight: 700; }
.evidence-statement p::before { display: grid; width: 24px; height: 24px; flex: 0 0 24px; place-items: center; content: "✓"; border-radius: 50%; color: var(--white); background: var(--signal); font-size: 11px; }
.client-proof-strip { padding: 72px 0 80px; border-bottom: 1px solid var(--line); background: var(--surface); }
.client-proof-strip h2 { max-width: 680px; margin-bottom: 50px; font-size: clamp(2rem, calc(1.5rem + 1.4vw), 3.3rem); }
.client-logo-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.client-logo { display: grid; min-height: 132px; padding: 26px; place-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); }
.client-logo-dark { border-color: var(--ink-soft); background: var(--ink); }
.client-logo img { width: 100%; max-width: 138px; height: 54px; object-fit: contain; }
.client-logo-wide img { max-width: 164px; height: 48px; }
.client-logo img[src$="enesa.png"] { max-width: 58px; height: 68px; }
.evidence-process-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.evidence-process-grid article { min-height: 300px; padding: 30px 30px 30px 0; }
.evidence-process-grid article + article { padding-left: 30px; border-left: 1px solid var(--line); }
.evidence-process-grid span { display: block; margin-bottom: 72px; color: var(--signal-dark); font-size: 12px; font-weight: 800; }
.evidence-process-grid p { color: var(--muted); }
.measurement-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.measurement-card { min-height: 310px; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); }
.measurement-card > span { display: block; margin-bottom: 76px; color: var(--signal-dark); font-size: 12px; font-weight: 800; }
.measurement-card p { color: var(--muted); }
.verified-metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 70px; border-top: 1px solid #444; }
.verified-metric-grid article { min-height: 340px; padding: 34px 34px 34px 0; }
.verified-metric-grid article + article { padding-left: 34px; border-left: 1px solid #444; }
.verified-metric-grid strong { display: block; margin-bottom: 48px; color: var(--signal); font-size: clamp(3.5rem, 6vw, 6rem); line-height: .9; letter-spacing: -.06em; }
.verified-metric-grid p { color: #aaa; }
.engagement-list { display: grid; gap: 28px; }
.engagement-card { display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper); }
.engagement-card picture { min-height: 100%; background: var(--surface); }
.engagement-card img { width: 100%; height: 100%; min-height: 540px; object-fit: cover; }
.engagement-card > div { padding: 48px; }
.engagement-card h3 { max-width: 720px; margin-bottom: 42px; font-size: clamp(2rem, calc(1.4rem + 1.5vw), 3.4rem); }
.engagement-evidence { margin: 0; }
.engagement-evidence > div { display: grid; grid-template-columns: 110px 1fr; padding: 20px 0; gap: 22px; border-top: 1px solid var(--line); }
.engagement-evidence dt { color: var(--signal-dark); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.engagement-evidence dd { margin: 0; color: var(--muted); }
.published-case-grid, .testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.published-case-grid article, .testimonial-grid figure { margin: 0; padding: 38px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); }
.published-case-card { min-height: 610px; }
.published-case-logo { display: grid; width: 100%; height: 108px; margin-bottom: 32px; padding: 24px 28px; place-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--white); }
.published-case-logo-dark { border-color: var(--ink-soft); background: var(--ink); }
.published-case-logo img { width: 100%; max-width: 168px; height: 58px; object-fit: contain; }
.published-case-logo-wide img { max-width: 214px; height: 54px; }
.published-case-logo img[src$="enesa.png"] { max-width: 62px; height: 70px; }
.published-case-meta { display: flex; min-height: 84px; align-items: flex-start; justify-content: space-between; gap: 20px; }
.published-case-meta strong, .published-case-meta a { font-size: 20px; font-weight: 700; }
.published-case-meta a { text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 5px; }
.published-case-meta span { color: var(--signal-dark); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-align: right; text-transform: uppercase; }
.published-case-card h3 { max-width: 560px; margin: 42px 0; font-size: clamp(2rem, calc(1.4rem + 1.3vw), 3.1rem); }
.published-case-card dl { margin: 0; }
.published-case-card dl > div { padding: 18px 0; border-top: 1px solid var(--line); }
.published-case-card dt { margin-bottom: 6px; color: var(--signal-dark); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.published-case-card dd { margin: 0; color: var(--muted); }
.deliverable-grid { display: grid; grid-template-columns: .85fr 1.15fr; align-items: start; gap: 100px; }
.deliverable-list { margin: 0; padding: 0; list-style: none; }
.deliverable-list li { display: grid; grid-template-columns: 54px 1fr; padding: 26px 0; gap: 18px; border-top: 1px solid #444; }
.deliverable-list li:last-child { border-bottom: 1px solid #444; }
.deliverable-list li > span { color: #ff7b73; font-size: 12px; font-weight: 800; }
.deliverable-list strong { display: block; margin-bottom: 8px; color: var(--white); font-size: 20px; }
.deliverable-list p { margin: 0; color: #aaa; }

.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: start; gap: 90px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: var(--radius-md); overflow: hidden; }
.stat { min-height: 180px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat:nth-child(2n) { border-right: 0; }
.stat:nth-last-child(-n+2) { border-bottom: 0; }
.stat strong { display: block; margin-bottom: 12px; color: var(--signal); font-size: 38px; letter-spacing: -.05em; }
.stat span { color: var(--muted); font-size: 13px; }

.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; }
.contact-meta { margin-top: 52px; }
.contact-meta a, .contact-meta span { display: block; margin-top: 8px; }
.contact-meta a { font-size: 20px; font-weight: 700; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { position: relative; }
.field-full { grid-column: 1 / -1; }
.field label { display: block; margin-bottom: 8px; color: #cbc7c2; font-size: 13px; font-weight: 650; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid #444; border-radius: var(--radius-sm); color: var(--white); background: #1b1b1b; }
.field input, .field select { height: 54px; padding: 0 16px; }
.field textarea { min-height: 150px; padding: 16px; resize: vertical; }
.field select { appearance: none; }
.form-note { grid-column: 1 / -1; color: #999; font-size: 12px; }
.form-note a { color: var(--white); text-decoration: underline; }
.form-status { grid-column: 1 / -1; min-height: 24px; color: #ffb2ad; }
.honey { position: absolute !important; left: -9999px !important; }

.page-hero { padding: 110px 0 80px; border-bottom: 1px solid var(--line); }
.mettric-breadcrumb { margin-bottom: 30px; color: var(--muted); font-size: 13px; }
.mettric-breadcrumb ol { display: flex; margin: 0; padding: 0; flex-wrap: wrap; gap: 8px; list-style: none; }
.mettric-breadcrumb li { display: flex; align-items: center; gap: 8px; }
.mettric-breadcrumb li:not(:last-child)::after { content: "/"; color: #aaa6a2; }
.mettric-breadcrumb a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; transition: color .2s, text-decoration-color .2s; }
.mettric-breadcrumb a:hover { color: var(--signal-dark); text-decoration-color: currentColor; }
.page-hero p { max-width: 680px; color: var(--muted); font-size: 20px; }
.page-hero h1 { max-width: 940px; }
.detail-hero { display: grid; grid-template-columns: 1fr .9fr; align-items: center; gap: 70px; }
.detail-hero img { width: 100%; aspect-ratio: 4/3; border-radius: var(--radius-lg); object-fit: cover; }
.detail-body { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.detail-body aside { position: sticky; top: 120px; align-self: start; }
.detail-list { display: grid; gap: 18px; }
.detail-item { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-md); }

.engineering-hub-hero, .engineering-hero { position: relative; overflow: hidden; padding: 92px 0; border-bottom: 1px solid var(--line); }
.engineering-hub-hero::before, .engineering-hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; background-image: linear-gradient(rgba(17,17,17,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(17,17,17,.045) 1px, transparent 1px); background-size: 64px 64px; -webkit-mask-image: linear-gradient(to bottom, #000, transparent 92%); mask-image: linear-gradient(to bottom, #000, transparent 92%); }
.engineering-hub-grid, .engineering-hero-grid { position: relative; display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 70px; }
.engineering-hub-grid h1, .engineering-hero-grid h1 { font-size: clamp(3.5rem, calc(2rem + 3vw), 5.5rem); }
.engineering-hub-grid picture, .engineering-hero-grid picture { overflow: hidden; border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
.engineering-hub-grid img, .engineering-hero-grid img { width: 100%; height: auto; aspect-ratio: 3/2; object-fit: cover; }
.engineering-article-nav { display: flex; margin-bottom: 42px; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; font-weight: 700; }
.engineering-article-nav a { color: var(--signal-dark); text-decoration: underline; text-underline-offset: 4px; }
.engineering-meta { display: flex; margin-top: 38px; gap: 18px; color: var(--muted); font-size: 12px; font-weight: 700; flex-wrap: wrap; }
.engineering-meta span { display: flex; align-items: center; gap: 9px; }
.engineering-meta span::before { width: 7px; height: 7px; content: ""; border-radius: 50%; background: var(--signal); }
.article-intro { display: grid; grid-template-columns: .85fr 1.15fr; align-items: start; gap: 90px; }
.article-intro > * { margin-bottom: 0; }
.article-deck { color: var(--ink); font-size: clamp(1.3rem, calc(1.1rem + .55vw), 1.7rem); line-height: 1.5; letter-spacing: -.02em; }
.principles-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 88px; gap: 24px; }
.principle-card { padding-top: 24px; border-top: 1px solid var(--ink); }
.principle-card > span { display: block; margin-bottom: 48px; color: var(--signal-dark); font-size: 12px; font-weight: 800; }
.principle-card p { color: var(--muted); }
.decision-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #444; border-left: 1px solid #444; }
.decision-card { min-height: 270px; padding: 30px; border-right: 1px solid #444; border-bottom: 1px solid #444; }
.decision-card > span { display: block; margin-bottom: 54px; color: #ff7b73; font-size: 12px; font-weight: 800; }
.decision-card p { color: #aaa; }
.application-list { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 76px; gap: 22px; }
.application-list article { min-height: 310px; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); }
.application-list p { color: var(--muted); }
.application-list strong { display: block; margin-top: 40px; color: var(--signal-dark); font-size: 13px; }
.checklist-grid { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: 90px; }
.engineering-checklist { margin: 0; padding: 0; list-style: none; }
.engineering-checklist li { position: relative; padding: 22px 20px 22px 48px; border-top: 1px solid var(--line); font-size: 18px; font-weight: 650; }
.engineering-checklist li:last-child { border-bottom: 1px solid var(--line); }
.engineering-checklist li::before { position: absolute; top: 24px; left: 10px; width: 18px; height: 18px; content: "?"; border-radius: 50%; color: var(--white); background: var(--signal); font-size: 11px; line-height: 18px; text-align: center; }
.engineering-related { padding: 82px 0; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 80px; }
.related-grid a { position: relative; display: block; padding: 30px 70px 30px 0; border-block: 1px solid #444; }
.related-grid a span, .related-grid a strong { display: block; }
.related-grid a span { margin-bottom: 8px; color: #999; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.related-grid a strong { color: var(--white); font-size: 24px; }
.related-grid a b { position: absolute; right: 8px; top: 50%; color: var(--signal); font-size: 30px; transform: translateY(-50%); }
.engineering-theme-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.engineering-theme-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper); transition: transform .2s, box-shadow .2s, border .2s; }
.engineering-theme-card:hover { border-color: var(--signal); box-shadow: var(--shadow); transform: translateY(-4px); }
.engineering-theme-card picture { display: block; overflow: hidden; background: var(--surface); }
.engineering-theme-card img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.engineering-theme-card:hover img { transform: scale(1.025); }
.engineering-theme-card > div { position: relative; padding: 32px; }
.engineering-theme-card span { color: var(--signal-dark); font-size: 12px; font-weight: 800; }
.engineering-theme-card b { position: absolute; right: 30px; top: 27px; font-size: 24px; }
.engineering-theme-card h3 { margin-top: 34px; }
.engineering-theme-card p { color: var(--muted); }
.manifesto-strip { display: grid; grid-template-columns: 1.4fr .6fr; margin-top: 88px; padding: 50px 0; align-items: end; gap: 60px; border-block: 1px solid var(--line); }
.manifesto-strip blockquote { margin: 0; font-size: clamp(2rem, calc(1.5rem + 1.8vw), 3.5rem); font-weight: 750; line-height: 1.08; letter-spacing: -.045em; }
.manifesto-strip span { color: var(--muted); font-size: 13px; font-weight: 700; }
.editorial-cta { display: flex; padding-top: 34px; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid #444; }
.editorial-cta p { margin: 0; color: #aaa; }
.editorial-cta a { color: var(--white); font-weight: 750; text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 6px; }

.site-footer { padding: 80px 0 24px; color: #c8c5c1; background: #0b0b0b; }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 50px; }
.footer-brand img { width: 170px; height: auto; }
.footer-brand p { max-width: 330px; margin-top: 24px; color: #8e8a86; }
.footer-label { margin-bottom: 22px; color: var(--white); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.footer-grid a, .footer-grid button { display: flex; min-height: 44px; margin: 0; padding: 0; border: 0; align-items: center; color: #aaa6a2; background: none; text-align: left; cursor: pointer; }
.footer-grid span { display: block; margin: 11px 0; color: #aaa6a2; }
.footer-grid a:hover, .footer-grid button:hover { color: var(--signal); }
.footer-bottom { display: flex; margin-top: 70px; padding-top: 24px; border-top: 1px solid #2a2a2a; justify-content: space-between; color: #777; font-size: 12px; }

.skip-link { position: fixed; z-index: 999; top: 10px; left: 10px; padding: 12px 18px; color: var(--white); background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.mt-button.mt-button--primary,
.mt-consent .mt-button--primary,
.mt-consent-modal .mt-button--primary {
  color: var(--white) !important;
  border-color: var(--signal) !important;
  background: var(--signal) !important;
}
.mt-button.mt-button--primary:hover,
.mt-consent .mt-button--primary:hover { background: var(--signal-dark) !important; }
.mt-consent a, .mt-consent-modal a { color: var(--signal-dark) !important; }
.mt-consent input, .mt-consent-modal input { accent-color: var(--signal) !important; }
.reveal { transition: opacity .6s ease, transform .6s ease; }
.js .reveal { opacity: 0; transform: translateY(24px); }
.js .reveal.visible { opacity: 1; transform: none; }

/* Notebooks de 13/14 polegadas usam viewports lógicos próximos de 1280–1512 px. */
@media (min-width: 1021px) and (max-width: 1600px) {
  :root { --container: 1160px; }
  .section { padding: 104px 0; }
  .section-compact { padding: 76px 0; }
  h1 { font-size: clamp(3.5rem, calc(2rem + 3vw), 4.75rem); }
  h2 { font-size: clamp(2.5rem, calc(1.75rem + 2.2vw), 3.75rem); }
  .header-inner { min-height: 76px; }
  .site-nav a { padding-block: 26px; }
  .site-nav { gap: 20px; }
  .site-nav a { font-size: 13px; }
  .hero { padding: 72px 0 60px; }
  .hero-grid { gap: 52px; }
  .hero-copy { padding: 24px 0; }
  .hero-copy h1 { font-size: clamp(3.6rem, calc(2rem + 3.2vw), 4.75rem); }
  .hero-actions { margin-top: 32px; }
  .hero-proof { margin-top: 42px; }
  .service-card { min-height: 300px; }
  .service-card:nth-child(5) { min-height: 240px; }
  .case-card { min-height: 420px; }
  .page-hero { padding: 84px 0 68px; }
  .page-hero p { font-size: 18px; }
}

/* Desktops amplos e telas Retina em escala intermediária. */
@media (min-width: 1601px) {
  :root { --container: 1320px; }
  body { font-size: 17px; }
  .section { padding: 132px 0; }
  .section-compact { padding: 96px 0; }
  .hero-grid, .image-feature, .about-grid, .contact-grid, .detail-hero, .detail-body, .engineering-hub-grid, .engineering-hero-grid { gap: 90px; }
  .page-hero p { font-size: 21px; }
}

/* 4K sem escala: amplia leitura e área útil, mantendo limites editoriais. */
@media (min-width: 2200px) {
  :root { --container: 1680px; }
  body { font-size: 18px; }
  .section { padding: 144px 0; }
  .section-compact { padding: 108px 0; }
  h1 { max-width: 1040px; font-size: 7rem; }
  h2 { max-width: 980px; font-size: 5rem; }
  h3 { font-size: 2.15rem; }
  .lead { max-width: 760px; font-size: 1.4rem; }
  .container { width: min(calc(100% - 96px), var(--container)); }
  .header-inner { min-height: 92px; }
  .brand img { width: 204px; }
  .site-nav { gap: 36px; }
  .site-nav a { padding-block: 33px; font-size: 15px; }
  .hero { padding: 128px 0 92px; }
  .hero-copy h1 { max-width: 980px; font-size: 6.75rem; }
  .hero-visual img { height: 900px; }
  .hero-proof, .logo-strip p, .service-number, .stat span, .field label { font-size: 14px; }
  .service-card { min-height: 380px; padding: 42px; }
  .service-card:nth-child(5) { min-height: 280px; }
  .case-card { min-height: 520px; padding: 52px; }
  .stat { min-height: 210px; padding: 38px; }
  .stat strong { font-size: 44px; }
  .page-hero { padding: 132px 0 96px; }
  .page-hero p { max-width: 760px; font-size: 22px; }
  .detail-item { padding: 34px; }
}

@media (max-width: 1020px) {
  .header-cta { display: none; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-nav { position: fixed; inset: 76px 0 0; display: grid; align-content: start; padding: 28px 30px 40px; border-bottom: 1px solid var(--line); background: var(--paper); opacity: 0; pointer-events: none; transform: translateY(-12px); transition: .2s; }
  .site-nav.open { opacity: 1; pointer-events: auto; transform: none; }
  .site-nav a { padding: 12px 0; font-size: 22px; }
  .site-nav a::after { display: none; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero-grid, .image-feature, .about-grid, .contact-grid, .detail-hero, .detail-body, .results-hero-grid, .deliverable-grid { gap: 46px; }
  .process-grid, .evidence-process-grid { grid-template-columns: 1fr 1fr; }
  .evidence-process-grid article:nth-child(3) { padding-left: 0; border-left: 0; }
  .measurement-grid { grid-template-columns: 1fr 1fr; }
  .client-logo-grid { grid-template-columns: repeat(3, 1fr); }
  .principles-grid, .decision-grid { grid-template-columns: 1fr 1fr; }
  .application-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 2; }
}

@media (max-width: 780px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .section { padding: 84px 0; }
  .section-compact { padding: 64px 0; }
  .header-inner { min-height: 70px; }
  .brand img { width: 150px; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-nav { position: fixed; inset: 70px 0 0; display: grid; align-content: start; padding: 24px 20px 36px; border-bottom: 1px solid var(--line); background: var(--paper); opacity: 0; pointer-events: none; transform: translateY(-12px); transition: .2s; }
  .site-nav.open { opacity: 1; pointer-events: auto; transform: none; }
  .site-nav a { padding: 12px 0; font-size: 24px; }
  .site-nav a::after { display: none; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { padding-top: 54px; }
  .page-hero { padding: 48px 0 64px; }
  .hero-grid, .image-feature, .about-grid, .contact-grid, .detail-hero, .detail-body, .engineering-hub-grid, .engineering-hero-grid, .article-intro, .checklist-grid, .related-grid, .manifesto-strip, .results-hero-grid, .deliverable-grid, .engagement-card { grid-template-columns: 1fr; }
  .hero-grid { gap: 36px; }
  .hero-copy { padding: 0; }
  h1 { font-size: clamp(2.85rem, 13vw, 4.5rem); }
  h2 { font-size: clamp(2.25rem, 10vw, 3.5rem); }
  .hero-copy h1 { font-size: clamp(3rem, 14vw, 4.5rem); }
  .hero-proof { flex-direction: column; gap: 14px; }
  .hero-visual img { height: auto; aspect-ratio: 16/10; object-position: center; }
  .hero-tag { right: 12px; }
  .logo-strip-inner { grid-template-columns: 1fr 1fr; }
  .logo-strip p { grid-column: 1 / -1; text-align: center; }
  .section-head { display: block; }
  .section-head .button { margin-top: 18px; }
  .service-card:nth-child(n) { grid-column: span 12; min-height: 280px; }
  .service-number { margin-bottom: 50px; }
  .image-feature.reverse .feature-image { order: initial; }
  .process-grid, .case-grid, .evidence-process-grid, .measurement-grid, .verified-metric-grid, .published-case-grid, .testimonial-grid { grid-template-columns: 1fr; }
  .results-hero { padding: 58px 0 72px; }
  .results-hero-grid { gap: 40px; }
  .client-proof-strip { padding: 58px 0 64px; }
  .client-logo-grid { grid-template-columns: repeat(2, 1fr); }
  .client-logo { min-height: 112px; padding: 18px; }
  .client-logo img { max-width: 130px; max-height: 50px; }
  .evidence-statement { padding: 28px; }
  .evidence-process-grid article, .evidence-process-grid article + article { min-height: auto; padding: 28px 0; border-left: 0; border-top: 1px solid var(--line); }
  .evidence-process-grid article:first-child { border-top: 0; }
  .evidence-process-grid span, .measurement-card > span { margin-bottom: 38px; }
  .measurement-card { min-height: auto; }
  .engagement-card img { height: auto; min-height: 0; aspect-ratio: 16/10; }
  .engagement-card > div { padding: 30px; }
  .engagement-evidence > div { grid-template-columns: 1fr; gap: 8px; }
  .verified-metric-grid article, .verified-metric-grid article + article { min-height: auto; padding: 30px 0; border-left: 0; }
  .published-case-card { min-height: auto; }
  .published-case-grid article { padding: 30px; }
  .published-case-meta { min-height: auto; flex-direction: column; }
  .published-case-meta span { text-align: left; }
  .engineering-hub-hero, .engineering-hero { padding: 58px 0 72px; }
  .engineering-hub-grid, .engineering-hero-grid { gap: 40px; }
  .engineering-hub-grid picture, .engineering-hero-grid picture { grid-row: 1; }
  .engineering-hub-grid h1, .engineering-hero-grid h1 { font-size: clamp(2.75rem, 12vw, 4.25rem); }
  .engineering-article-nav { margin-bottom: 28px; }
  .article-intro, .checklist-grid { gap: 38px; }
  .principles-grid, .decision-grid, .engineering-theme-grid { grid-template-columns: 1fr; }
  .principles-grid, .application-list { margin-top: 54px; }
  .principle-card > span, .decision-card > span { margin-bottom: 30px; }
  .decision-card, .application-list article { min-height: auto; }
  .manifesto-strip { margin-top: 58px; gap: 30px; }
  .engineering-related { padding: 64px 0; }
  .editorial-cta { align-items: flex-start; flex-direction: column; }
  .case-card { min-height: 390px; padding: 30px; }
  .contact-form { grid-template-columns: 1fr; }
  .field-full, .form-note, .form-status { grid-column: auto; }
  .detail-body aside { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}