:root {
  --ink: #07121c;
  --ink-soft: #122433;
  --blue: #00a8e8;
  --blue-deep: #0077b6;
  --ice: #dff6ff;
  --paper: #f5f8fa;
  --white: #ffffff;
  --muted: #627380;
  --line: #cfd9df;
  --max: 1240px;
  --pad: clamp(1.25rem, 4vw, 4rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Segoe UI", Aptos, "Helvetica Neue", Arial, sans-serif; font-size: 16px; line-height: 1.65; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 1rem; top: -6rem; z-index: 1000; background: var(--white); color: var(--ink); padding: .7rem 1rem; border-radius: .2rem; }
.skip-link:focus { top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.96); color: var(--ink); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 76px; max-width: var(--max); margin: auto; padding: 0 var(--pad); display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; }
.logo-surface { display: grid; place-items: center; }
.brand-logo { display: block; width: auto; height: 56px; }
.brand-division { border-left: 1px solid var(--line); padding-left: .75rem; font: 650 .72rem/1.25 "Segoe UI", Aptos, sans-serif; letter-spacing: .11em; text-transform: uppercase; max-width: 5.8rem; }
.site-nav { display: flex; gap: 2rem; align-items: stretch; align-self: stretch; }
.site-nav a { position: relative; display: flex; align-items: center; text-decoration: none; color: #596c79; font-size: .88rem; font-weight: 600; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .22s ease; }
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]::after, .site-nav a:hover::after { transform: scaleX(1); }
.menu-toggle { display: none; border: 0; background: transparent; color: var(--ink); font: inherit; font-weight: 600; align-items: center; gap: .65rem; }
.menu-toggle i, .menu-toggle i::before { display: block; width: 22px; height: 2px; background: currentColor; transition: transform .2s ease; }
.menu-toggle i { position: relative; }
.menu-toggle i::before { content: ""; position: absolute; top: -7px; }
.menu-toggle[aria-expanded="true"] i { transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] i::before { top: 0; transform: rotate(90deg); }

.hero { position: relative; min-height: calc(100vh - 76px); max-width: 1600px; margin: auto; padding: clamp(4.5rem, 9vw, 8.5rem) var(--pad) 0; background: var(--ink); color: var(--white); display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(340px, .92fr); grid-template-rows: 1fr auto; gap: 2.5rem clamp(2rem, 5vw, 6rem); overflow: hidden; }
.hero::before { content: ""; position: absolute; width: 46rem; height: 46rem; border-radius: 50%; right: -22rem; top: -20rem; background: radial-gradient(circle, rgba(0,168,232,.26), transparent 68%); }
.hero-grid { position: absolute; inset: 0; opacity: .11; background-image: linear-gradient(rgba(255,255,255,.22) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.22) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to right, black, transparent 72%); }
.hero-copy, .hero-visual, .hero-rail { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 1.5rem; color: var(--blue); font-size: .78rem; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
h1, h2, h3 { font-family: "Segoe UI", Aptos, "Helvetica Neue", Arial, sans-serif; margin-top: 0; font-weight: 650; }
h1 { margin-bottom: 1.8rem; font-size: clamp(3.15rem, 6.2vw, 6.4rem); line-height: .95; letter-spacing: -.055em; max-width: 900px; }
h1 em { color: var(--blue); font-style: normal; }
.hero-lede { color: #c9d5dc; max-width: 720px; font-size: clamp(1.05rem, 1.45vw, 1.3rem); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.3rem; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: .65rem; padding: .8rem 1.15rem; border: 1px solid transparent; text-decoration: none; font-weight: 700; font-size: .9rem; transition: transform .18s ease, background .18s ease, color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--ink); }
.button-primary:hover { background: #42c9f5; }
.button-quiet { border-color: rgba(255,255,255,.25); color: var(--white); }
.button-quiet:hover { background: rgba(255,255,255,.08); }
.hero-visual { min-height: 520px; align-self: stretch; border-left: 1px solid rgba(255,255,255,.16); }
.hero-image { position: absolute; inset: 3rem 0 1.4rem 2rem; background: linear-gradient(145deg, rgba(0,168,232,.18), rgba(3,17,27,.15)), url('/mosaic-hvac-intelligent-mechanical-infrastructure-hero-2026.webp') center/cover no-repeat; filter: saturate(.8) contrast(1.05); }
.hero-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(7,18,28,.05), rgba(7,18,28,.48)); }
.signal-card { position: absolute; display: grid; grid-template-columns: auto 1fr; column-gap: .75rem; min-width: 205px; padding: .9rem 1rem; background: rgba(7,18,28,.86); border: 1px solid rgba(255,255,255,.18); backdrop-filter: blur(10px); }
.signal-card > span { grid-row: 1/3; color: var(--blue); font: 650 .72rem/1 "Segoe UI", Aptos, sans-serif; }
.signal-card strong { font: 650 .9rem/1.15 "Segoe UI", Aptos, sans-serif; }
.signal-card small { color: #aab8c2; font-size: .7rem; margin-top: .25rem; }
.signal-one { top: 11%; left: -.5rem; }
.signal-two { top: 47%; right: -1rem; }
.signal-three { bottom: 4%; left: 3rem; }
.hero-rail { grid-column: 1/-1; display: flex; flex-wrap: wrap; gap: 0; border-top: 1px solid rgba(255,255,255,.15); }
.hero-rail span { flex: 1; min-width: 150px; padding: 1.1rem 1rem; color: #a9b6bf; border-right: 1px solid rgba(255,255,255,.15); font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; }

.section { max-width: var(--max); margin: auto; padding: clamp(5rem, 10vw, 9rem) var(--pad); }
.section-kicker { display: flex; align-items: center; gap: .85rem; margin-bottom: clamp(2rem, 5vw, 4.5rem); color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.section-kicker span { color: var(--blue-deep); }
.section-kicker::after { content: ""; width: 4.5rem; height: 1px; background: var(--line); }
.section-kicker.light { color: #95a6b2; }
.perspective-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 4rem; align-items: start; }
h2 { font-size: clamp(2.4rem, 4.6vw, 4.8rem); line-height: 1.02; letter-spacing: -.045em; margin-bottom: 0; }
.prose { color: #455966; font-size: 1.07rem; }
.prose p:first-child { margin-top: .2rem; color: var(--ink-soft); font-size: 1.3rem; }
.system-line { margin-top: clamp(3rem, 7vw, 6rem); padding: 2rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 1.5rem; }
.system-line div { display: grid; gap: .35rem; }
.system-line b { font-family: "Segoe UI", Aptos, sans-serif; font-size: 1rem; }
.system-line span { color: var(--muted); font-size: .84rem; }
.system-line i { width: 2.5rem; height: 1px; background: var(--blue-deep); position: relative; }
.system-line i::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid var(--blue-deep); border-right: 1px solid var(--blue-deep); transform: rotate(45deg); }

.focus { max-width: none; background: var(--ink-soft); color: var(--white); padding-left: max(var(--pad), calc((100vw - var(--max))/2 + var(--pad))); padding-right: max(var(--pad), calc((100vw - var(--max))/2 + var(--pad))); }
.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; gap: 4rem; align-items: end; }
.section-heading p { color: #aebdc6; font-size: 1.05rem; margin: 0; }
.capability-grid { margin-top: 4rem; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.15); border-left: 1px solid rgba(255,255,255,.15); }
.capability-grid article { min-height: 245px; padding: 1.7rem; border-right: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); transition: background .2s ease; }
.capability-grid article:hover { background: rgba(0,168,232,.08); }
.cap-number { color: var(--blue); font: 650 .72rem "Segoe UI", Aptos, sans-serif; }
.capability-grid h3 { margin: 3.5rem 0 .8rem; font-size: 1.25rem; }
.capability-grid p { margin: 0; color: #aebdc6; font-size: .92rem; }
.scope-note { margin-top: 2rem; padding: 1.75rem 2rem; border: 1px solid rgba(255,255,255,.18); border-left: 3px solid var(--blue); background: rgba(255,255,255,.035); }
.scope-note .eyebrow { margin: 0 0 .6rem; color: var(--blue); }
.scope-note h3 { margin: 0 0 .65rem; font-size: 1.25rem; }
.scope-note > p:last-child { max-width: 980px; margin: 0; color: #aebdc6; font-size: .9rem; }

.approach-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(3rem, 8vw, 8rem); }
.approach-intro p { color: var(--muted); font-size: 1.05rem; max-width: 500px; margin-top: 2rem; }
.approach-steps { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.approach-steps li { display: grid; grid-template-columns: 3rem 1fr; gap: 1.5rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); }
.approach-steps > li > span { color: var(--blue-deep); font: 650 .75rem "Segoe UI", Aptos, sans-serif; padding-top: .25rem; }
.approach-steps h3 { margin: 0 0 .45rem; font-size: 1.25rem; }
.approach-steps p { margin: 0; color: var(--muted); font-size: .92rem; }

.company { max-width: none; padding: 0; background: var(--ink); color: var(--white); }
.strategic-context { border-top: 1px solid var(--line); }
.strategic-context-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(3rem, 8vw, 8rem); align-items: start; }
.strategic-context-grid > div:last-child { color: var(--muted); font-size: 1.05rem; }
.strategic-context-grid > div:last-child p:first-child { margin-top: .25rem; }
.strategic-context .strategic-context-link { color: var(--blue-deep); }
.company-panel { max-width: 1600px; margin: auto; min-height: 720px; padding: clamp(5rem, 9vw, 8rem) max(var(--pad), calc((100vw - var(--max))/2 + var(--pad))); background: linear-gradient(90deg, rgba(7,18,28,.92) 0%, rgba(7,18,28,.86) 48%, rgba(7,18,28,.25) 100%), url('/mosaic-hvac-building-performance-infrastructure-2026.webp') center/cover no-repeat; }
.company-copy { max-width: 690px; }
.company-copy p { margin-top: 2rem; color: #c2cfd6; font-size: 1.05rem; }
.company-copy .boundary-note { padding-left: 1.1rem; border-left: 2px solid var(--blue); color: #9fb0bb; font-size: .9rem; }
.company-copy .history-note { margin-top: 1rem; color: #879aa6; font-size: .8rem; }
.text-link { display: inline-flex; gap: .5rem; margin-top: 1.25rem; color: var(--white); text-decoration-thickness: 1px; text-underline-offset: .35rem; font-weight: 700; }
.company-links { display: flex; flex-wrap: wrap; gap: 1rem 1.75rem; }

.contact { max-width: var(--max); margin: auto; padding: clamp(5rem, 9vw, 8rem) var(--pad); display: grid; grid-template-columns: 1fr .7fr; gap: 4rem; align-items: center; }
.contact h2 { max-width: 760px; }
.contact-copy { border-left: 1px solid var(--line); padding-left: 3rem; }
.contact-copy p { margin: 0 0 1.5rem; color: var(--muted); }
.contact .button-primary { background: var(--ink); color: var(--white); }
.contact .button-primary:hover { background: var(--blue-deep); }

.site-footer { background: #050d14; color: var(--white); padding: 4rem max(var(--pad), calc((100vw - var(--max))/2 + var(--pad))) 2rem; }
.brand-footer .brand-logo { height: 92px; }
.brand-footer .brand-division { border-color: rgba(255,255,255,.25); color: var(--white); }
.footer-top { display: grid; grid-template-columns: 1fr 1fr 1.2fr; gap: 2rem; align-items: start; padding-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer-top > p { margin: 0; color: #9cabb5; }
.footer-links { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 1.3rem; }
.footer-links a { display: inline-flex; min-height: 44px; align-items: center; color: #c9d3da; font-size: .86rem; }
.footer-legal { padding-top: 2rem; color: #8496a2; font-size: .75rem; line-height: 1.6; }
.footer-legal p { max-width: 980px; margin: 0 0 .8rem; }
.footer-legal span { display: block; margin-top: 1.5rem; color: #b7c4cb; }

.legal-main { max-width: 920px; margin: auto; padding: clamp(4rem, 8vw, 7rem) var(--pad); }
.legal-main .eyebrow { margin-bottom: 1rem; }
.legal-main h1 { color: var(--ink); font-size: clamp(2.7rem, 6vw, 5rem); line-height: 1; }
.legal-lede { max-width: 760px; color: var(--ink-soft); font-size: 1.2rem; }
.legal-updated { color: var(--muted); font-size: .9rem; }
.legal-section { padding: 2rem 0; border-top: 1px solid var(--line); }
.legal-section:first-of-type { margin-top: 3rem; }
.legal-section h2 { margin-bottom: 1rem; font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.025em; }
.legal-section h3 { margin: 1.4rem 0 .45rem; font-size: 1.05rem; }
.legal-section p, .legal-section li { color: #455966; }
.legal-section a { text-underline-offset: .2rem; }
.legal-section ul { padding-left: 1.25rem; }
.legal-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.legal-actions .button:not(.button-primary) { border-color: var(--line); }
.legal-header-link { font-weight: 700; text-underline-offset: .2rem; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }

@media (max-width: 900px) {
  .menu-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; inset: 76px 0 auto; padding: 1rem var(--pad) 1.5rem; background: var(--white); border-top: 1px solid var(--line); box-shadow: 0 18px 32px rgba(7,18,28,.12); flex-direction: column; gap: 0; }
  .site-nav.open { display: flex; }
  .site-nav a { min-height: 48px; }
  .site-nav a::after { right: auto; width: 2.7rem; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 5rem; }
  .hero-visual { min-height: 480px; border-left: 0; border-top: 1px solid rgba(255,255,255,.16); }
  .hero-image { inset: 2rem 0 1rem; }
  .perspective-grid, .section-heading, .approach-layout, .contact, .strategic-context-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-copy { border-left: 0; border-top: 1px solid var(--line); padding: 2rem 0 0; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-column: 1/-1; justify-content: flex-start; }
}

@media (max-width: 620px) {
  .brand-logo { height: 50px; }
  .brand-division { font-size: .66rem; }
  .hero { padding-top: 4rem; }
  h1 { font-size: clamp(2.75rem, 14vw, 4.3rem); }
  .hero-actions .button { width: 100%; }
  .hero-visual { min-height: 410px; }
  .signal-card { min-width: 175px; padding: .75rem; }
  .signal-two { right: -.5rem; }
  .signal-three { left: 1rem; }
  .hero-rail span { min-width: 50%; }
  .system-line { grid-template-columns: 1fr; }
  .system-line i { transform: rotate(90deg); margin: .25rem 0 .25rem 1rem; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid article { min-height: 215px; }
  .company-panel { min-height: auto; background-position: 64% center; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links { grid-column: auto; flex-direction: column; }
}