:root {
  --navy-950: #061523;
  --navy-900: #0a1d2d;
  --navy-800: #102c42;
  --blue: #0879bd;
  --cyan: #10bceb;
  --cyan-soft: #9ce8fa;
  --orange: #ef8d32;
  --paper: #f3f6f7;
  --white: #ffffff;
  --ink: #102230;
  --muted: #607383;
  --line: #d7e0e5;
  --line-dark: rgba(255, 255, 255, .13);
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
p, h1, h2, h3, figure { margin-top: 0; }
.skip-link { position: fixed; z-index: 100; left: 1rem; top: -5rem; padding: .75rem 1rem; color: var(--navy-950); background: white; }
.skip-link:focus { top: 1rem; }

.site-header {
  position: absolute;
  z-index: 30;
  top: 0;
  left: 50%;
  width: min(calc(100% - 4rem), var(--max));
  min-height: 92px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: 235px 1fr auto;
  align-items: center;
  border-bottom: 1px solid var(--line-dark);
}
.brand { width: 194px; height: 54px; padding: 7px 12px; display: flex; align-items: center; background: white; }
.brand img { width: 100%; height: 100%; object-fit: contain; }
.desktop-nav { display: flex; justify-content: center; gap: clamp(1.2rem, 2.2vw, 2.3rem); color: #d6e1e9; font-size: .88rem; font-weight: 650; }
.desktop-nav a, .header-cta { transition: color .2s ease, border-color .2s ease, background .2s ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--cyan); }
.header-cta { padding: .72rem 1rem; color: white; border: 1px solid rgba(255,255,255,.38); font-size: .86rem; font-weight: 760; }
.header-cta:hover, .header-cta:focus-visible { color: var(--navy-950); background: var(--cyan); border-color: var(--cyan); }
.menu-toggle, .mobile-nav { display: none; }

.hero {
  min-height: 825px;
  padding: 150px max(2rem, calc((100vw - var(--max)) / 2)) 90px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, .92fr);
  gap: clamp(3rem, 7vw, 7.5rem);
  align-items: center;
  position: relative;
  overflow: hidden;
  color: white;
  background: var(--navy-950);
}
.hero::before { content: ""; position: absolute; width: 40vw; height: 40vw; right: -11vw; top: -15vw; border: 1px solid rgba(16,188,235,.22); border-radius: 50%; box-shadow: 0 0 0 75px rgba(16,188,235,.025), 0 0 0 150px rgba(16,188,235,.018); }
.hero::after { content: "PD&E"; position: absolute; left: -1vw; bottom: -7vw; color: rgba(255,255,255,.022); font-size: min(23vw, 23rem); font-weight: 900; letter-spacing: -.09em; line-height: 1; }
.technical-grid { position: absolute; inset: 0; opacity: .27; pointer-events: none; background-image: linear-gradient(rgba(16,188,235,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(16,188,235,.12) 1px, transparent 1px); background-size: 62px 62px; mask-image: linear-gradient(to right, black, transparent 75%); }
.hero-copy, .hero-atlas { position: relative; z-index: 2; }
.eyebrow { margin-bottom: 1.35rem; display: flex; align-items: center; gap: .7rem; color: #a8bbc9; font-size: .75rem; line-height: 1.2; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow span { width: 38px; height: 2px; background: var(--cyan); }
.eyebrow-dark { color: #597081; }
h1 { margin-bottom: 1.6rem; max-width: 780px; font-size: clamp(3.65rem, 6.2vw, 6.7rem); line-height: .95; letter-spacing: -.07em; font-weight: 770; }
h1 em { color: var(--cyan); font-style: normal; }
.hero-lede { max-width: 690px; margin-bottom: 2rem; color: #bbc9d3; font-size: 1.08rem; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button { min-height: 52px; padding: .8rem 1.2rem; display: inline-flex; align-items: center; justify-content: center; gap: 1rem; border: 1px solid transparent; font-size: .9rem; font-weight: 780; transition: transform .2s ease, color .2s ease, background .2s ease, border-color .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: var(--navy-950); background: var(--cyan); }
.button-primary:hover, .button-primary:focus-visible { background: white; }
.button-outline { color: white; border-color: rgba(255,255,255,.38); }
.button-outline:hover, .button-outline:focus-visible { background: rgba(255,255,255,.08); border-color: white; }
.hero-facts { margin-top: 3.5rem; padding-top: 1.35rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; border-top: 1px solid var(--line-dark); }
.hero-facts strong, .hero-facts span { display: block; }
.hero-facts strong { margin-bottom: .1rem; font-size: 1rem; }
.hero-facts span { color: #869cab; font-size: .75rem; line-height: 1.35; }

.hero-atlas { padding: 1rem; background: rgba(10,29,45,.94); border: 1px solid #2b4c62; box-shadow: 0 34px 95px rgba(0,0,0,.36); }
.hero-atlas::before { content: ""; position: absolute; z-index: -1; inset: -14px 14px 14px -14px; border: 1px solid rgba(16,188,235,.34); }
.atlas-head { min-height: 42px; display: flex; justify-content: space-between; gap: 1rem; align-items: center; color: #8eb0c2; border-bottom: 1px solid var(--line-dark); font: 700 .68rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.atlas-main { height: 280px; margin-top: 1rem; position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.12); }
.atlas-main img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.7) contrast(1.04); }
.atlas-main::after { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 55%, rgba(6,21,35,.94)); }
.atlas-main > div { position: absolute; z-index: 2; left: 1rem; right: 1rem; bottom: .8rem; display: flex; justify-content: space-between; gap: 1rem; align-items: flex-end; }
.atlas-main span { font-size: .83rem; font-weight: 760; }
.atlas-main strong { color: var(--cyan); font-size: 1.05rem; }
.atlas-pair { margin-top: .75rem; display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.atlas-pair figure { margin-bottom: 0; position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.12); }
.atlas-pair img { width: 100%; height: 155px; object-fit: cover; filter: saturate(.65) brightness(.82); }
.atlas-pair figcaption { position: absolute; inset: auto 0 0; padding: 2.5rem .7rem .6rem; display: flex; justify-content: space-between; gap: .6rem; align-items: flex-end; background: linear-gradient(transparent, rgba(6,21,35,.94)); }
.atlas-pair span { font-size: .68rem; line-height: 1.25; }
.atlas-pair b { color: var(--cyan); font-size: .68rem; white-space: nowrap; }
.atlas-status { min-height: 42px; display: flex; align-items: flex-end; gap: .55rem; color: #7f96a6; font: 700 .65rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; }
.atlas-status i { width: 7px; height: 7px; background: var(--cyan); border-radius: 50%; box-shadow: 0 0 12px var(--cyan); }

.capability-band { min-height: 76px; padding: 0 max(2rem, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 1rem; overflow: hidden; color: #c6d3dc; background: var(--navy-900); border-top: 1px solid rgba(255,255,255,.06); }
.capability-band p { margin: 0; white-space: nowrap; font-size: .72rem; font-weight: 820; letter-spacing: .11em; text-transform: uppercase; }
.capability-band i { flex: 0 0 4px; width: 4px; height: 4px; background: var(--cyan); transform: rotate(45deg); }

.section { padding: 112px max(2rem, calc((100vw - var(--max)) / 2)); }
.section-heading { margin-bottom: 3.25rem; display: grid; grid-template-columns: 1.35fr .65fr; gap: 4rem; align-items: end; }
.section-heading h2, .retrofit-heading h2, .company h2, .standards h2, .contact h2 { margin-bottom: 0; max-width: 840px; font-size: clamp(2.6rem, 4.55vw, 4.85rem); line-height: 1.02; letter-spacing: -.058em; }
.section-heading > p, .retrofit-heading > p { margin-bottom: 0; color: var(--muted); line-height: 1.75; }

.services { background: var(--paper); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-card { min-height: 350px; padding: 1.7rem; position: relative; background: rgba(255,255,255,.44); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease, background .25s ease; }
.service-card:hover { z-index: 2; transform: translateY(-5px); background: white; box-shadow: 0 22px 50px rgba(17,47,67,.09); }
.card-index { color: #758796; font: 700 .72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.service-card h3 { margin: 4.2rem 0 .8rem; font-size: 1.3rem; line-height: 1.25; }
.service-card p { color: #596d7c; }
.service-card > span { position: absolute; left: 1.7rem; right: 1.7rem; bottom: 1.45rem; padding-top: .8rem; color: #718391; border-top: 1px solid var(--line); font-size: .73rem; font-weight: 700; letter-spacing: .03em; }

.multidisciplinary { background: white; }
.multidisciplinary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.15rem; }
.discipline-visual { overflow: hidden; background: var(--navy-950); border: 1px solid #1e4157; box-shadow: 0 18px 50px rgba(17,47,67,.11); }
.discipline-image { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--navy-800); }
.discipline-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(6,21,35,.48)); pointer-events: none; }
.discipline-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.discipline-visual:hover .discipline-image img { transform: scale(1.018); }
.discipline-copy { min-height: 225px; padding: 1.45rem 1.55rem 1.6rem; color: white; border-top: 3px solid var(--cyan); }
.discipline-copy > span { color: var(--cyan); font-size: .7rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.discipline-copy h3 { margin: .45rem 0 .7rem; font-size: 1.48rem; line-height: 1.2; }
.discipline-copy p { margin: 0; color: #adc0cc; font-size: .9rem; line-height: 1.65; }
.visual-note { margin: 1rem 0 0; color: #667a88; font-size: .78rem; font-style: italic; text-align: right; }

.projects { color: white; background: var(--navy-950); }
.section-heading-light > p { color: #a8b8c4; }
.project-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.project-card { grid-column: span 6; min-height: 440px; position: relative; overflow: hidden; background: var(--navy-800); border: 1px solid rgba(255,255,255,.13); }
.project-card-large { grid-column: span 7; min-height: 590px; }
.project-card-large + .project-card { grid-column: span 5; min-height: 590px; }
.project-card-wide { grid-column: span 7; }
.project-card-wide + .project-card { grid-column: span 5; }
.project-card img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.6) brightness(.7) contrast(1.02); transition: transform .55s ease, filter .4s ease; }
.project-card:hover img { transform: scale(1.025); filter: saturate(.9) brightness(.78); }
.project-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 25%, rgba(6,21,35,.18) 48%, rgba(6,21,35,.98) 100%); }
.project-content { position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; padding: 5rem 1.5rem 1.4rem; }
.project-content > span { color: var(--cyan); font-size: .7rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.project-content h3 { margin: .3rem 0 .15rem; font-size: 1.48rem; line-height: 1.18; }
.project-content strong { display: block; color: #dce8ee; font-size: .84rem; }
.project-content p { max-width: 680px; margin: .65rem 0 0; color: #aebdc8; font-size: .84rem; line-height: 1.55; }
.more-work { margin-top: 1rem; padding: 1.25rem 0; display: grid; grid-template-columns: 220px 1fr; gap: 2rem; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.more-work > span { color: var(--cyan); font-size: .7rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.more-work > div { display: flex; flex-wrap: wrap; gap: .6rem 1.3rem; }
.more-work p { margin: 0; color: #afbdc8; font-size: .78rem; }
.more-work p::before { content: "+"; margin-right: .45rem; color: var(--cyan); }

.retrofit { background: white; }
.retrofit-heading { margin-bottom: 3rem; display: grid; grid-template-columns: 1.3fr .7fr; gap: 4rem; align-items: end; }
.retrofit-summary { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.retrofit-summary > div { min-height: 250px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.retrofit-summary span { color: var(--blue); font: 750 .72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.retrofit-summary h3 { margin: 3.3rem 0 .55rem; font-size: 1.2rem; }
.retrofit-summary p { margin-bottom: 0; color: #5e7180; font-size: .9rem; }
.technical-details { margin-top: 2.5rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.technical-card { padding: 0; overflow: hidden; color: var(--ink); background: var(--paper); border: 1px solid var(--line); text-align: left; cursor: zoom-in; transition: transform .25s ease, box-shadow .25s ease; }
.technical-card:hover, .technical-card:focus-visible { transform: translateY(-4px); box-shadow: 0 18px 45px rgba(16,47,67,.1); }
.technical-image { height: 240px; overflow: hidden; background: white; border-bottom: 1px solid var(--line); }
.technical-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.technical-card:hover img { transform: scale(1.025); }
.technical-card > div:last-child { padding: 1.15rem 1.2rem 1.35rem; }
.technical-card span { color: var(--blue); font-size: .7rem; font-weight: 840; letter-spacing: .1em; text-transform: uppercase; }
.technical-card h3 { margin: .35rem 0 .25rem; font-size: 1.16rem; }
.technical-card p { margin: 0; color: #617383; font-size: .84rem; }
.technical-note { margin: 1.5rem 0 0 auto; max-width: 750px; padding: 1rem 1.1rem; color: #586b79; background: #eef4f6; border-left: 4px solid var(--orange); font-size: .84rem; }

.company { padding: 112px max(2rem, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr .92fr; gap: clamp(3rem, 7vw, 7rem); align-items: center; color: white; background: var(--navy-900); }
.company-copy > p:not(.eyebrow) { max-width: 680px; margin-top: 1.5rem; color: #aebdca; }
.company-principles { margin-top: 2rem; border-top: 1px solid var(--line-dark); }
.company-principles > div { padding: .95rem 0; display: grid; grid-template-columns: 38px 1fr; gap: .9rem; border-bottom: 1px solid var(--line-dark); }
.company-principles b { color: var(--cyan); font: 700 .7rem/1.45 ui-monospace, SFMono-Regular, Menlo, monospace; }
.company-principles span { color: #95a8b6; font-size: .86rem; }
.company-principles strong { display: block; margin-bottom: .12rem; color: white; font-size: .96rem; }
.company-panel { position: relative; color: var(--ink); background: white; box-shadow: 18px 18px 0 rgba(16,188,235,.2); }
.panel-head { min-height: 48px; padding: 0 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; color: #5b7181; background: #eaf1f4; border-bottom: 1px solid var(--line); font: 750 .66rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
.leadership { display: grid; grid-template-columns: 1fr 1fr; }
.leadership article { min-height: 180px; padding: 1.2rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.leadership article:last-child { border-right: 0; }
.leadership span { color: var(--blue); font-size: .68rem; font-weight: 820; line-height: 1.4; letter-spacing: .08em; text-transform: uppercase; }
.leadership strong { display: block; margin: 2.2rem 0 .1rem; font-size: 1.15rem; }
.leadership p { margin: 0; color: #657887; font-size: .78rem; }
.discipline-list > div { min-height: 60px; padding: .85rem 1rem; display: flex; justify-content: space-between; gap: 1rem; align-items: center; border-bottom: 1px solid var(--line); }
.discipline-list span { color: #526776; font-size: .8rem; }
.discipline-list b { color: var(--blue); font-size: .73rem; text-align: right; }

.standards { padding: 100px max(2rem, calc((100vw - var(--max)) / 2)); background: #e8eff2; }
.standards-inner { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(3rem, 8vw, 8rem); align-items: center; }
.standards h2 { font-size: clamp(2.5rem, 4vw, 4.15rem); }
.standards-board { border-top: 1px solid #c4d0d7; }
.standards-board > div { min-height: 74px; padding: .9rem 0; display: grid; grid-template-columns: 160px 1fr; gap: 1rem; align-items: center; border-bottom: 1px solid #c4d0d7; }
.standards-board span { color: #637887; font-size: .72rem; font-weight: 820; letter-spacing: .08em; text-transform: uppercase; }
.standards-board p { margin: 0; font-size: .88rem; font-weight: 680; }

.process { padding: 112px max(2rem, calc((100vw - var(--max)) / 2)); color: white; background: var(--navy-950); }
.process-grid { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.process-grid li { min-height: 300px; padding: 1.35rem; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.process-grid b { color: var(--cyan); font: 700 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.process-grid h3 { margin: 5.2rem 0 .55rem; font-size: 1.08rem; }
.process-grid p { margin: 0; color: #92a5b4; font-size: .83rem; }

.contact { padding: 108px max(2rem, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(3rem, 8vw, 8rem); align-items: center; color: white; background: var(--blue); }
.contact .eyebrow { color: #c9eef8; }
.contact .eyebrow span { background: white; }
.contact-copy > p:not(.eyebrow) { max-width: 660px; margin: 1.5rem 0 1.9rem; color: #d0e7f2; }
.contact .button-primary { color: var(--navy-950); background: white; }
.contact .button-primary:hover { background: var(--cyan-soft); }
.contact-list { border-top: 1px solid rgba(255,255,255,.28); }
.contact-list > a, .contact-list > div { min-height: 90px; padding: 1rem 0; display: grid; grid-template-columns: 88px 1fr auto; gap: 1rem; align-items: center; border-bottom: 1px solid rgba(255,255,255,.28); transition: padding .2s ease, background .2s ease; }
.contact-list > a:hover, .contact-list > a:focus-visible { padding-left: .75rem; padding-right: .75rem; background: rgba(255,255,255,.08); }
.contact-list span { color: #c2e6f3; font-size: .7rem; font-weight: 820; letter-spacing: .1em; text-transform: uppercase; }
.contact-list strong { font-size: .96rem; word-break: break-word; }
.contact-list b { color: white; }
.contact-list > div { grid-template-columns: 88px 1fr; }

footer { min-height: 122px; padding: 1.5rem max(2rem, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 170px 1fr auto; gap: 2rem; align-items: center; color: #687b89; background: white; border-top: 1px solid var(--line); font-size: .74rem; }
footer img { width: 150px; }
footer p { margin: 0; }
footer p:last-child { text-align: right; }
.whatsapp-float {
  position: fixed;
  z-index: 50;
  right: 1.5rem;
  bottom: 1.5rem;
  min-height: 58px;
  padding: .7rem 1rem .7rem .7rem;
  display: flex;
  align-items: center;
  gap: .7rem;
  color: white;
  background: #168a47;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 999px;
  box-shadow: 0 15px 38px rgba(6,21,35,.28);
  font-size: .88rem;
  font-weight: 820;
  line-height: 1;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.whatsapp-float:hover, .whatsapp-float:focus-visible {
  transform: translateY(-3px);
  background: #0f733a;
  box-shadow: 0 19px 45px rgba(6,21,35,.34);
}
.whatsapp-float:focus-visible { outline: 3px solid white; outline-offset: 3px; }
.whatsapp-icon { width: 36px; height: 36px; display: grid; place-items: center; flex: 0 0 36px; background: rgba(255,255,255,.16); border-radius: 50%; }
.whatsapp-icon svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.whatsapp-float b { font-size: 1rem; }

.lightbox { width: min(94vw, 1120px); max-height: 94vh; padding: 0; color: white; background: var(--navy-950); border: 1px solid #31536a; box-shadow: 0 30px 100px rgba(0,0,0,.62); }
.lightbox::backdrop { background: rgba(1,8,14,.88); backdrop-filter: blur(5px); }
.lightbox img { width: 100%; max-height: 80vh; object-fit: contain; background: #eef3f5; }
.lightbox p { margin: 0; padding: .9rem 1rem; font-size: .84rem; }
.lightbox-close { position: absolute; z-index: 2; right: .75rem; top: .75rem; width: 42px; height: 42px; color: var(--navy-950); background: var(--cyan); border: 0; cursor: pointer; font-size: 1.55rem; line-height: 1; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: .09s; }
.delay-2 { transition-delay: .18s; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1060px) {
  .site-header { width: calc(100% - 2rem); grid-template-columns: 1fr auto; }
  .desktop-nav, .header-cta { display: none; }
  .menu-toggle { width: 46px; height: 46px; display: grid; place-content: center; gap: 7px; color: white; background: transparent; border: 1px solid var(--line-dark); cursor: pointer; }
  .menu-toggle span { width: 20px; height: 2px; background: currentColor; transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4.5px) rotate(-45deg); }
  .mobile-nav { position: fixed; inset: 92px -1rem auto; min-height: calc(100vh - 92px); padding: 2rem; background: var(--navy-950); border-top: 1px solid var(--line-dark); }
  .mobile-nav.open { display: flex; flex-direction: column; }
  .mobile-nav a { padding: 1rem 0; color: white; border-bottom: 1px solid var(--line-dark); font-size: 1.18rem; font-weight: 730; }
  .hero { grid-template-columns: 1fr; gap: 5rem; }
  .hero-copy { max-width: 830px; }
  .hero-atlas { width: min(100%, 640px); margin: 0 auto; }
  .section-heading, .retrofit-heading, .company, .standards-inner, .contact { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .discipline-copy { min-height: 245px; }
  .project-card, .project-card-large, .project-card-large + .project-card, .project-card-wide, .project-card-wide + .project-card { grid-column: span 6; min-height: 480px; }
  .technical-details { grid-template-columns: 1fr 1fr; }
  .technical-card:last-child { grid-column: span 2; }
  .company-panel { width: min(100%, 720px); }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px) {
  body { padding-bottom: 82px; }
  .site-header { min-height: 76px; }
  .brand { width: 168px; height: 48px; }
  .mobile-nav { top: 76px; }
  .hero { min-height: auto; padding: 126px 1.25rem 76px; gap: 4.5rem; }
  h1 { font-size: clamp(3.15rem, 14vw, 4.5rem); }
  .hero-lede { font-size: 1rem; }
  .hero-actions .button { width: 100%; }
  .hero-facts { grid-template-columns: 1fr; gap: .85rem; }
  .hero-facts div { padding-bottom: .7rem; border-bottom: 1px solid var(--line-dark); }
  .atlas-head { font-size: .6rem; }
  .atlas-main { height: 230px; }
  .atlas-pair img { height: 130px; }
  .capability-band { min-height: 64px; padding: 0 1.25rem; justify-content: flex-start; overflow-x: auto; }
  .section, .company, .standards, .process, .contact { padding: 82px 1.25rem; }
  .section-heading, .retrofit-heading { gap: 1.35rem; margin-bottom: 2.3rem; }
  .section-heading h2, .retrofit-heading h2, .company h2, .standards h2, .contact h2 { font-size: clamp(2.45rem, 11vw, 3.35rem); }
  .service-grid, .retrofit-summary, .technical-details, .process-grid { grid-template-columns: 1fr; }
  .multidisciplinary-grid { grid-template-columns: 1fr; }
  .discipline-copy { min-height: auto; }
  .visual-note { text-align: left; }
  .service-card { min-height: 325px; }
  .project-grid { display: block; }
  .project-card, .project-card-large, .project-card-large + .project-card, .project-card-wide, .project-card-wide + .project-card { min-height: 390px; margin-bottom: .8rem; }
  .project-content { padding: 4rem 1.1rem 1.1rem; }
  .project-content h3 { font-size: 1.3rem; }
  .more-work { grid-template-columns: 1fr; gap: .8rem; }
  .technical-card:last-child { grid-column: auto; }
  .technical-image { height: 220px; }
  .leadership { grid-template-columns: 1fr; }
  .leadership article { border-right: 0; }
  .discipline-list > div { align-items: flex-start; }
  .standards-board > div { grid-template-columns: 1fr; gap: .2rem; }
  .process-grid li { min-height: 250px; }
  .process-grid h3 { margin-top: 3.8rem; }
  .contact { gap: 2.5rem; }
  .contact-list > a, .contact-list > div { grid-template-columns: 72px 1fr auto; gap: .65rem; }
  .contact-list > div { grid-template-columns: 72px 1fr; }
  footer { padding: 1.5rem 1.25rem; grid-template-columns: 1fr; gap: .7rem; }
  footer p:last-child { text-align: left; }
  .whatsapp-float { left: 1rem; right: 1rem; bottom: 1rem; justify-content: center; }
}

@media (max-width: 440px) {
  .hero-atlas { padding: .7rem; }
  .atlas-main { height: 210px; }
  .atlas-pair { grid-template-columns: 1fr; }
  .atlas-pair img { height: 145px; }
  .panel-head { font-size: .58rem; }
}