@font-face {
  font-family: "Structure";
  src: url("assets/structure.woff2") format("woff2");
  font-display: swap;
  font-style: normal;
  font-weight: 400;
}
@font-face { font-family: "Barlow Semi Condensed"; src: url("assets/barlow-semi-condensed-800.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 800; }
@font-face { font-family: "Barlow Semi Condensed"; src: url("assets/barlow-semi-condensed-700.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 700; }
@font-face { font-family: "Barlow"; src: url("assets/barlow-400.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 400; }
@font-face { font-family: "Barlow"; src: url("assets/barlow-600.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 600; }
@font-face { font-family: "Barlow"; src: url("assets/barlow-700.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 700 900; }
@font-face { font-family: "Barlow Condensed"; src: url("assets/barlow-condensed-600.woff2") format("woff2"); font-display: swap; font-style: normal; font-weight: 600; }

:root {
  --ink: #07090a;
  --ink-2: #0d1113;
  --ink-3: #151a1d;
  --paper: #f1f1ed;
  --paper-2: #e6e7e3;
  --steel: #b9bec2;
  --silver: #e9ecee;
  --muted: #8d969b;
  --air: #91d9f6;
  --air-deep: #3aa9da;
  --heat: #e78047;
  --line: rgba(255,255,255,.15);
  --display: "Barlow Semi Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --label: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Barlow", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --shell: min(1360px, calc(100% - 96px));
}

/* Type scale: keep the existing composition, but give each level a clear job. */
.hero h1 { font-size: clamp(64px, 5.4vw, 76px); font-weight: 800; letter-spacing: .015em; }
.section-heading h2, .help-section .section-heading h2, .legacy-copy h2, .trust-intro h2, .proof-copy h2, .commercial-intro h2, .area-copy h2, .faq-layout h2 { font-size: clamp(48px, 4.2vw, 58px); font-weight: 800; letter-spacing: .01em; }
.service-panel h3 { font-size: clamp(48px, 4.3vw, 58px); font-weight: 800; letter-spacing: .01em; }
.final-cta h2 { font-size: clamp(58px, 5.2vw, 72px); font-weight: 800; letter-spacing: .01em; }
.service-tabs button, .need-card b, .name-evolution strong, .trust-facts strong, .response-status strong, .big-phone, .emergency-number { font-family: var(--display); font-weight: 700; }
.eyebrow, .weather-rail, .service-panel-copy > p:first-child, .button, .text-link, .hero-disciplines { font-family: var(--label); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); overflow-x: clip; }
body { margin: 0; color: var(--silver); background: var(--ink); font-family: var(--body); font-size: 17px; line-height: 1.62; overflow-x: clip; }
body.dialog-open { overflow: hidden; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { color: inherit; }
:focus-visible { outline: 3px solid var(--air); outline-offset: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 999; padding: 12px 18px; color: #000; background: #fff; transition: top .2s; }
.skip-link:focus { top: 20px; }
section[id] { scroll-margin-top: 82px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; height: 92px; display: grid; grid-template-columns: 260px 1fr auto; align-items: center; gap: 30px; padding: 0 48px; border-bottom: 1px solid transparent; transition: height .35s, background .35s, border-color .35s; }
.site-header.is-scrolled { height: 74px; background: rgba(6,8,9,.88); border-color: var(--line); backdrop-filter: blur(18px); }
.brand { min-height: 44px; display: inline-flex; align-items: center; gap: 12px; width: max-content; }
.brand-logo { width: 58px; height: 58px; display: block; flex: 0 0 58px; overflow: hidden; border-radius: 50%; mix-blend-mode: screen; }
.brand-logo img { width: 142%; max-width: none; height: auto; transform: translate(-14.7%, -14.7%); object-fit: contain; }
.brand > span:last-child { display: grid; text-transform: uppercase; }
.brand strong { color: #f4f5f5; font-family: var(--display); font-size: 34px; font-weight: 800; letter-spacing: .105em; line-height: .76; -webkit-text-stroke: .7px currentColor; text-shadow: 0 4px 18px rgba(0,0,0,.5); }
.brand small { color: var(--air); font-family: var(--body); font-size: 11px; font-weight: 700; letter-spacing: .42em; line-height: 1; margin-top: 9px; }
.desktop-nav { display: flex; justify-content: center; gap: clamp(20px, 3vw, 46px); }
.desktop-nav a { position: relative; min-height: 44px; display: inline-flex; align-items: center; color: #d6dbdd; font-size: 16px; font-weight: 650; letter-spacing: .018em; line-height: 1.2; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; bottom: -9px; width: 0; height: 1px; background: var(--air); transition: width .25s; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 18px; }
.header-phone { min-height: 44px; display: inline-flex; align-items: center; font-family: var(--body); font-size: 16px; font-weight: 800; letter-spacing: .025em; }
.menu-toggle { display: none; width: 48px; height: 48px; border: 1px solid var(--line); background: transparent; padding: 13px; }
.menu-toggle span { display: block; width: 100%; height: 1px; margin: 5px 0; background: #fff; }
.mobile-menu { position: absolute; top: 100%; left: 0; right: 0; padding: 24px; background: rgba(6,8,9,.98); border-bottom: 1px solid var(--line); }
.mobile-menu a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); font-family: var(--body); font-size: 19px; font-weight: 700; letter-spacing: .035em; line-height: 1.3; text-transform: uppercase; }

.site-header .button { font-size: 14px; letter-spacing: .065em; }

.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: center; gap: 18px; padding: 0 24px; border: 1px solid transparent; border-radius: 0; cursor: pointer; font-family: var(--body); font-size: 13px; font-weight: 850; letter-spacing: .075em; text-transform: uppercase; transition: color .25s, background .25s, border-color .25s, transform .25s; }
.button:hover { transform: translateY(-2px); }
.button-light { color: #090b0c; background: linear-gradient(120deg, #fff, #bfc5c8 52%, #f5f6f6); box-shadow: inset 0 1px rgba(255,255,255,.85); }
.button-light:hover { background: var(--air); }
.button-ghost { color: #fff; background: rgba(7,9,10,.22); border-color: rgba(255,255,255,.42); }
.button-ghost:hover { border-color: var(--air); color: var(--air); }
.button-dark { color: #fff; background: #0b0e10; border-color: #0b0e10; }
.button-dark:hover { color: #071014; background: var(--air); border-color: var(--air); }

.hero { position: relative; min-height: 100svh; height: auto; display: flex; align-items: flex-start; padding: 164px 0 160px; overflow: clip; contain: paint; background: radial-gradient(circle at 73% 48%, #182126 0, #0c1114 27%, #060809 61%); border-bottom: 1px solid var(--line); }
.ambient-video { display: block; object-fit: cover; pointer-events: none; }
.hero-video { position: absolute; z-index: 0; inset: 0 0 0 auto; width: 43%; height: 100%; opacity: .48; filter: grayscale(.2) saturate(.62) contrast(1.08); -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.5) 20%, #000 52%); mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.5) 20%, #000 52%); animation: hero-video-in 3.2s .25s cubic-bezier(.22,.65,.3,1) both; }
@keyframes hero-video-in { from { opacity: 0; transform: scale(1.018); } to { opacity: .48; transform: scale(1); } }
.technical-grid { position: absolute; inset: 0; opacity: .18; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to right, transparent, black 42%, transparent); }
.hero::before { content: ""; position: absolute; inset: 0; z-index: 1; background: radial-gradient(circle at 50% 48%, rgba(3,5,6,.56) 0 15%, rgba(3,5,6,.38) 32%, rgba(3,5,6,.16) 53%, transparent 78%), linear-gradient(90deg, rgba(3,5,6,.98) 0%, rgba(3,5,6,.78) 38%, rgba(3,5,6,.1) 68%, rgba(3,5,6,.43) 100%), linear-gradient(0deg, rgba(0,0,0,.7), transparent 40%); }
.hero::after { content: ""; position: absolute; z-index: 2; top: -20%; right: -5%; width: 58%; height: 145%; background: linear-gradient(105deg, transparent 30%, rgba(205,235,246,.05) 42%, rgba(255,255,255,.23) 48%, rgba(153,215,241,.05) 54%, transparent 64%); transform: translateX(-130%) skewX(-6deg); animation: reveal-sweep 2.1s .15s cubic-bezier(.3,.7,.2,1) forwards; pointer-events: none; }
@keyframes reveal-sweep { to { transform: translateX(120%) skewX(-6deg); } }
.air-field { position: absolute; inset: 0; z-index: 2; pointer-events: none; filter: blur(1px); opacity: .7; }
.air-field i { position: absolute; display: block; width: 70%; height: 230px; left: 20%; top: 26%; border: 1px solid rgba(166,220,240,.2); border-color: rgba(166,220,240,.22) transparent transparent transparent; border-radius: 50%; transform: rotate(-8deg); animation: airflow 10s ease-in-out infinite alternate; }
.air-field i:nth-child(2) { width: 86%; top: 38%; left: 8%; opacity: .45; animation-delay: -3s; }
.air-field i:nth-child(3) { width: 62%; top: 48%; left: 35%; opacity: .25; animation-delay: -6s; }
@keyframes airflow { from { transform: translate3d(-3%,12px,0) rotate(-8deg) scaleX(.94); } to { transform: translate3d(4%,-10px,0) rotate(-6deg) scaleX(1.05); } }
.hero-mark { position: absolute; z-index: 3; width: min(41vw, 600px); left: 50%; right: auto; top: 50%; transform: translate(-50%,-53%); opacity: .78; mix-blend-mode: screen; }
.hero-mark img { width: 100%; height: auto; object-fit: contain; mix-blend-mode: normal; filter: contrast(1.12) brightness(.86) drop-shadow(0 30px 60px rgba(0,0,0,.75)); }
.hero-copy { position: relative; z-index: 5; width: min(620px, 44vw); margin-left: max(48px, calc((100vw - 1360px)/2)); padding-top: 0; }
.hero-copy::before { content: ""; position: absolute; z-index: -1; inset: -55px -115px -55px -40px; background: linear-gradient(90deg, rgba(3,5,6,.96) 0%, rgba(3,5,6,.84) 54%, rgba(3,5,6,.38) 78%, transparent 100%); filter: blur(9px); pointer-events: none; }
.eyebrow { display: flex; align-items: center; gap: 13px; margin: 0 0 20px; color: #c7cdd0; font-family: var(--body); font-size: 11px; font-weight: 750; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow span { width: 28px; height: 1px; background: var(--air); }
.eyebrow.dark { color: #455057; }
.hero h1, h2 { margin: 0; font-family: var(--display); font-weight: 400; letter-spacing: .045em; text-transform: uppercase; line-height: 1; }
.hero h1 { max-width: 720px; font-size: clamp(108px, 12.5vw, 180px); letter-spacing: .052em; line-height: 1; }
h1 em, h2 em { color: inherit; font-style: normal; }
.hero h1 em { color: #d4d7d7; }
.hero-disciplines { margin: 23px 0 0; color: #c5cccf; font-size: 12px; font-weight: 750; letter-spacing: .18em; text-transform: uppercase; }
.hero-intro { max-width: 560px; margin: 17px 0 26px; color: #c9ced1; font-size: clamp(16px, 1.15vw, 18px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.emergency-inline { display: flex; align-items: center; gap: 10px; min-height: 46px; margin-top: 15px; padding: 0; border: 0; background: transparent; cursor: pointer; color: #e5e8ea; font-size: 13px; font-weight: 850; letter-spacing: .075em; text-transform: uppercase; }
.emergency-inline i { width: 8px; height: 8px; border-radius: 50%; background: var(--air); box-shadow: 0 0 0 5px rgba(145,217,246,.1), 0 0 16px var(--air); }
.emergency-inline span { color: var(--air); margin-left: 7px; }
.legacy-note { margin-top: 30px; color: #aab3b7; font-size: 13px; }
.legacy-note strong { color: #d6dadd; }
.hero-side-note { position: absolute; z-index: 4; right: 27px; top: 50%; display: flex; align-items: center; gap: 30px; writing-mode: vertical-rl; color: #aab2b6; font-family: var(--body); font-size: 9px; letter-spacing: .22em; text-transform: uppercase; }
.hero-side-note b { color: var(--air); font-size: 14px; }
.trust-rail { position: absolute; z-index: 6; inset: auto 0 0; min-height: 112px; display: grid; grid-template-columns: repeat(4, 1fr); padding: 0 max(48px, calc((100vw - 1360px)/2)); background: rgba(7,10,11,.76); border-top: 1px solid var(--line); backdrop-filter: blur(16px); }
.trust-rail > div { min-width: 0; display: flex; align-items: center; gap: 17px; padding: 20px 30px; border-left: 1px solid var(--line); }
.trust-rail > div:last-child { border-right: 1px solid var(--line); }
.trust-rail strong { color: #fff; font-family: var(--display); font-size: clamp(29px, 2.65vw, 46px); letter-spacing: .04em; line-height: 1; text-transform: uppercase; }
.trust-rail span { color: #b5bec2; font-size: 11px; font-weight: 800; letter-spacing: .09em; line-height: 1.5; text-transform: uppercase; }

.weather-rail { position: absolute; z-index: 8; top: 92px; left: 0; right: 0; min-height: 44px; display: grid; grid-template-columns: 1.1fr .8fr .9fr 1fr 1.6fr; align-items: center; gap: 18px; padding: 0 max(48px, calc((100vw - 1360px)/2)); color: #b5bfc3; background: rgba(7,10,11,.68); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); font-family: var(--body); font-size: 11px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.weather-rail span { white-space: nowrap; }
.weather-rail b { color: #fff; font-size: 12px; }
.weather-rail strong { justify-self: end; color: var(--air); font-size: 11px; }
.weather-place::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 9px; border-radius: 50%; background: var(--air); box-shadow: 0 0 10px var(--air); }
.air-transition { position: relative; z-index: 3; height: 190px; margin-top: -1px; overflow: hidden; background: linear-gradient(#080b0c 0%, #373d40 31%, #b8bdc0 57%, #eef0ef 80%, var(--paper) 100%); }
.air-transition::before { content: ""; position: absolute; z-index: 1; inset: 0; opacity: .58; background: linear-gradient(#080b0c 0%, rgba(55,61,64,.78) 31%, rgba(184,189,192,.8) 57%, #eef0ef 80%, var(--paper) 100%), repeating-linear-gradient(0deg, rgba(255,255,255,.2) 0 1px, transparent 1px 5px); }
.vent-video { position: absolute; z-index: 0; inset: 0; width: 100%; height: 100%; opacity: .42; filter: grayscale(.65) contrast(1.08); }
.linear-vent { position: absolute; z-index: 2; left: 50%; top: 61px; width: min(860px, 72vw); height: 42px; display: grid; grid-template-columns: repeat(12,1fr); gap: 8px; padding: 9px 20px; transform: translateX(-50%) perspective(200px) rotateX(14deg); background: linear-gradient(#daddde,#7d8387 48%,#e8eaeb); border: 1px solid rgba(255,255,255,.66); box-shadow: 0 12px 24px rgba(0,0,0,.22), inset 0 1px 1px #fff; }
.linear-vent i { display: block; background: #202528; border-top: 1px solid rgba(255,255,255,.22); box-shadow: inset 0 2px 5px #000; }
.vent-air { position: absolute; left: 50%; top: 92px; width: min(780px, 68vw); height: 100px; transform: translateX(-50%); }
.vent-air i { position: absolute; top: 0; left: 8%; width: 84%; height: 85px; border: 1px solid rgba(151,210,232,.32); border-color: transparent transparent rgba(151,210,232,.34); border-radius: 50%; animation: vent-flow 3.5s ease-in-out infinite; }
.vent-air i:nth-child(2) { left: 22%; width: 55%; top: 9px; animation-delay: -1.1s; }.vent-air i:nth-child(3) { left: 34%; width: 31%; top: 18px; animation-delay: -2.2s; }
@keyframes vent-flow { 0% { opacity: 0; transform: translateY(-8px) scaleX(.7); } 45% { opacity: .8; } 100% { opacity: 0; transform: translateY(36px) scaleX(1.15); } }

.section-light { color: #121719; background: var(--paper); }
.section-shell { width: var(--shell); margin-inline: auto; padding: 120px 0; }
.section-heading { margin-bottom: 62px; }
.section-heading h2 { font-size: clamp(100px, 10vw, 170px); }
.split-heading { display: grid; grid-template-columns: 1.35fr .65fr; align-items: end; gap: 80px; }
.split-heading > p { max-width: 480px; margin: 0 0 8px; color: #586267; font-size: 18px; }
.help-section .section-heading { margin-bottom: 30px; }
.help-section .section-heading h2 { font-size: clamp(92px, 9vw, 150px); }
.help-section .split-heading { grid-template-columns: 1.05fr .72fr; gap: 48px; }
.help-section .split-heading > p { max-width: 390px; justify-self: end; }
.emergency-bar { width: 100%; min-height: 58px; display: grid; grid-template-columns: 30px auto 1fr auto; align-items: center; gap: 18px; padding: 0 20px; color: #fff; background: #7b372d; border: 1px solid #682d25; cursor: pointer; text-align: left; transition: background .25s; }
.emergency-bar:hover { background: #8d4033; }
.emergency-bar svg { width: 22px; fill: none; stroke: #f3d5cf; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.emergency-bar strong, .emergency-bar b { font-family: var(--body); font-size: 13px; font-weight: 850; letter-spacing: .075em; text-transform: uppercase; }
.emergency-bar span { color: #f0d4cf; font-size: 13px; font-weight: 650; letter-spacing: .055em; text-transform: uppercase; }
.emergency-bar b { justify-self: end; color: #fff; }
.need-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-left: 1px solid #bdc3c5; }
.need-card { position: relative; min-height: 210px; display: flex; flex-direction: column; align-items: flex-start; padding: 25px 20px; color: #161b1e; background: transparent; border: 0; border-right: 1px solid #bdc3c5; border-bottom: 1px solid #bdc3c5; cursor: pointer; text-align: left; transition: background .25s, color .25s; }
.need-card > span { color: #66747b; font-family: var(--body); font-size: 12px; font-weight: 750; letter-spacing: .12em; }
.need-card b { margin-top: auto; font-family: var(--display); font-size: clamp(23px, 1.9vw, 32px); font-weight: 400; letter-spacing: .05em; line-height: 1.04; text-transform: uppercase; }
.need-card small { min-height: 42px; margin-top: 11px; color: #59666c; font-size: 13px; line-height: 1.45; }
.need-card i { position: absolute; top: 20px; right: 18px; font-style: normal; }
.need-card:hover, .need-card.is-active { color: #fff; background: #111517; }
.need-card:hover small, .need-card.is-active small { color: #aeb8bc; }
.need-card.is-active > span, .need-card.is-active i { color: var(--air); }
.need-response { display: grid; grid-template-columns: .5fr 1.35fr .75fr; align-items: center; gap: 40px; min-height: 140px; padding: 28px 32px; color: #dce1e3; background: #0d1113; }
.response-status { display: grid; gap: 8px; border-right: 1px solid var(--line); }
.response-status span { color: var(--air); font-size: 12px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.response-status strong { font-family: var(--display); font-size: 26px; font-weight: 400; letter-spacing: .05em; line-height: 1.04; text-transform: uppercase; }
.need-response > p { margin: 0; color: #afb8bc; }
.need-response > div:last-child { display: grid; gap: 10px; }
.text-link { width: max-content; min-height: 46px; display: inline-flex; align-items: center; padding: 0; color: inherit; background: none; border: 0; cursor: pointer; font-size: 13px; font-weight: 850; letter-spacing: .055em; text-transform: uppercase; }
.text-link span { color: var(--air); margin-left: 10px; }
.reveal-ready { opacity: 0; transform: translateY(22px); transition: opacity .75s ease, transform .75s ease; }
.reveal-ready.revealed { opacity: 1; transform: translateY(0); }

.legacy-section { position: relative; min-height: 880px; display: grid; grid-template-columns: 56% 44%; background: #090c0d; overflow: hidden; }
.legacy-photo { min-height: 880px; background: linear-gradient(90deg, transparent 40%, #090c0d 100%), linear-gradient(0deg, rgba(4,6,7,.65), transparent 70%), url("assets/spiral-duct-brick.webp") 55% center / cover no-repeat; filter: saturate(.55) contrast(1.1); }
.legacy-copy { align-self: center; position: relative; z-index: 2; max-width: 660px; padding: 100px 80px 100px 45px; }
.legacy-number { position: absolute; z-index: -1; right: 9%; top: -85px; margin: 0; color: rgba(255,255,255,.035); font-family: var(--display); font-size: 390px; font-weight: 400; line-height: 1; }
.legacy-copy h2 { font-size: clamp(105px, 10.5vw, 180px); }
.legacy-copy > p:not(.eyebrow):not(.legacy-number) { max-width: 570px; margin: 35px 0; color: #abb4b8; font-size: 17px; }
.name-evolution { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px; padding-top: 32px; border-top: 1px solid var(--line); }
.name-evolution div { display: grid; gap: 7px; }
.name-evolution small { color: #748087; font-size: 9px; font-weight: 800; letter-spacing: .2em; text-transform: uppercase; }
.name-evolution strong { font-family: var(--display); font-size: 27px; font-weight: 400; letter-spacing: .048em; line-height: 1.08; text-transform: uppercase; }
.name-evolution > span { color: var(--air); }
.vertical-caption { position: absolute; left: 20px; bottom: 50px; margin: 0; writing-mode: vertical-rl; color: rgba(255,255,255,.46); font-family: var(--body); font-size: 8px; letter-spacing: .22em; text-transform: uppercase; }

.services-layout { display: grid; grid-template-columns: .34fr .66fr; border: 1px solid #bcc2c4; }
.service-tabs { display: grid; align-content: stretch; }
.service-tabs button { min-width: 0; min-height: 112px; display: grid; grid-template-columns: 48px minmax(0,1fr) auto; align-items: center; gap: 10px; padding: 0 26px; color: #242b2e; background: transparent; border: 0; border-bottom: 1px solid #bcc2c4; cursor: pointer; font-family: var(--display); font-size: clamp(27px, 2.6vw, 40px); font-weight: 400; letter-spacing: .048em; text-align: left; text-transform: uppercase; transition: background .25s, color .25s; }
.service-tabs button:last-child { border-bottom: 0; }
.service-tabs button span { color: #7a858b; font-size: 10px; letter-spacing: .15em; }
.service-tabs button i { font-size: 18px; font-style: normal; }
.service-tabs button[aria-selected="true"], .service-tabs button:hover { color: #fff; background: #0c1012; }
.service-tabs button[aria-selected="true"] span, .service-tabs button[aria-selected="true"] i { color: var(--air); }
.service-panel { position: relative; min-height: 560px; overflow: hidden; color: #fff; background: #101416; }
.service-panel > img { width: 100%; height: 100%; position: absolute; inset: 0; object-fit: cover; filter: saturate(.6) contrast(1.12) brightness(.66); transition: opacity .25s, transform .65s; }
.service-panel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,7,8,.2), rgba(5,7,8,.88) 65%), linear-gradient(0deg, rgba(5,7,8,.85), transparent); }
.service-panel-copy { position: relative; z-index: 2; width: min(460px, 58%); margin-left: auto; padding: 65px 50px; }
.service-panel-copy > p:first-child { color: var(--air); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.service-panel h3 { margin: 8px 0 18px; font-family: var(--display); font-size: clamp(85px, 8.5vw, 140px); font-weight: 400; letter-spacing: .046em; line-height: 1; text-transform: uppercase; }
.service-panel-copy > p:nth-of-type(2) { color: #b3bdc1; }
.service-panel ul { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; padding: 24px 0 30px; list-style: none; border-top: 1px solid var(--line); }
.service-panel li { display: grid; grid-template-columns: 12px minmax(0, 1fr); column-gap: 8px; align-items: start; line-height: 1.5; }
.service-panel li::before { content: "+"; color: var(--air); margin: 0; }
.equipment-note { display: grid; grid-template-columns: .28fr 1fr; gap: 45px; margin: 24px 0 0; padding: 23px 0; color: #4e5b61; border-bottom: 1px solid #bec4c6; font-size: 14px; }
.equipment-note span { color: #1c2428; font-family: var(--body); font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }

.trust-section { position: relative; overflow: hidden; background: linear-gradient(135deg, #f3f4f1, #dfe2e1); }
.trust-section::before { content: "S"; position: absolute; right: -5vw; top: -15vw; color: rgba(14,23,27,.035); font-family: var(--display); font-size: 70vw; font-weight: 400; line-height: 1; transform: skewX(-7deg); }
.trust-video { position: absolute; z-index: 0; inset: 0 0 0 auto; width: 48%; height: 100%; opacity: .095; filter: grayscale(1) contrast(1.15); -webkit-mask-image: linear-gradient(90deg, transparent, #000 38%); mask-image: linear-gradient(90deg, transparent, #000 38%); }
.trust-section .section-shell { position: relative; z-index: 1; }
.trust-intro { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 55px; margin-bottom: 60px; }
.trust-intro .eyebrow { grid-column: 1/-1; margin-bottom: -25px; }
.trust-intro h2 { font-size: clamp(105px, 11vw, 180px); }
.trust-intro > p:last-child { max-width: 480px; color: #596469; font-size: 18px; }
.trust-intro h2 em { color: #596368; }
.trust-facts { position: relative; display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid #aeb5b8; border-left: 1px solid #aeb5b8; }
.trust-facts article { min-height: 360px; padding: 25px; border-right: 1px solid #aeb5b8; border-bottom: 1px solid #aeb5b8; }
.trust-facts article > span { color: #5f6d74; font-family: var(--body); font-size: 11px; font-weight: 750; letter-spacing: .12em; }
.trust-facts strong { display: block; margin: 40px 0 25px; color: #111719; font-family: var(--display); font-size: clamp(67px, 7.5vw, 112px); font-weight: 400; letter-spacing: .04em; line-height: .95; }
.trust-facts h3 { margin: 0; font-family: var(--body); font-size: 17px; font-weight: 800; letter-spacing: .045em; line-height: 1.16; text-transform: uppercase; }
.trust-facts p { color: #536168; font-size: 15px; }
.diamond-line { position: relative; display: grid; grid-template-columns: .8fr 1fr 1.5fr; align-items: center; gap: 30px; padding: 28px 0; border-bottom: 1px solid #aeb5b8; }
.diamond-line span { color: #4b565b; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.diamond-line strong { font-family: var(--body); font-size: 16px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.diamond-line p { margin: 0; color: #59666c; font-size: 14px; }


.proof-section { min-height: 780px; display: grid; grid-template-columns: 48% 52%; color: #fff; background: #0a0d0f; }
.proof-image { background: linear-gradient(90deg, transparent 54%, #0a0d0f), linear-gradient(0deg, rgba(4,6,7,.5), transparent), url("assets/spiral-duct-gallery.webp") center / cover no-repeat; filter: saturate(.65); }
.proof-copy { align-self: center; max-width: 790px; padding: 100px 80px 100px 45px; }
.proof-copy h2 { font-size: clamp(96px, 10vw, 175px); }
.proof-copy blockquote { margin: 36px 0 12px; padding-left: 24px; border-left: 2px solid var(--air); font-family: Georgia, serif; font-size: clamp(22px, 2vw, 30px); font-style: italic; }
.proof-copy > p:not(.eyebrow) { max-width: 620px; color: #aeb8bc; }
.proof-copy cite { color: var(--air); font-size: 12px; font-style: normal; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.proof-timeline { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 20px; margin-top: 45px; padding-top: 30px; border-top: 1px solid var(--line); }
.proof-timeline div { display: grid; }
.proof-timeline b { font-family: var(--body); font-size: 14px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.proof-timeline span { color: #9ba6aa; font-size: 12px; }
.proof-timeline i { color: var(--air); font-style: normal; }

.commercial-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; grid-template-rows: auto 390px; gap: 18px; }
.commercial-intro { grid-column: 1 / 3; padding-right: 70px; }
.commercial-intro h2 { font-size: clamp(98px, 10vw, 170px); }
.commercial-intro > p:last-child { max-width: 640px; color: #5e686d; font-size: 17px; }
.work-card { position: relative; min-height: 360px; margin: 0; overflow: hidden; background: #161b1d; }
.work-card-wide { grid-row: 1 / 3; grid-column: 3; }
.work-card img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.7); transition: transform .7s, filter .4s; }
.work-card:hover img { transform: scale(1.035); filter: saturate(1); }
.work-card figcaption { position: absolute; inset: auto 0 0; display: grid; padding: 26px; color: #fff; background: linear-gradient(transparent, rgba(5,7,8,.92)); }
.work-card figcaption span { color: var(--air); font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.work-card figcaption b { font-family: var(--body); font-size: 17px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }

.area-section { min-height: 850px; display: grid; grid-template-columns: 38% 62%; color: #121719; background: #e8eae8; border-top: 1px solid #c0c5c6; }
.living-map { min-width: 0; align-self: center; margin: 70px 5vw 70px 0; border: 1px solid #9fa8ac; background: #d9dddc; box-shadow: 0 22px 50px rgba(30,41,45,.12); }
.map-toolbar { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 20px; background: #f4f5f2; border-bottom: 1px solid #aab2b5; }
.map-tabs { display: flex; gap: 4px; }
.map-tabs button { min-height: 46px; padding: 0 16px; color: #445158; background: transparent; border: 0; cursor: pointer; font-size: 12px; font-weight: 850; letter-spacing: .07em; text-transform: uppercase; }
.map-tabs button[aria-selected="true"] { color: #fff; background: #111719; }
.map-toolbar > span { color: #5c696f; font-size: 11px; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; }
.area-map { position: relative; min-height: 610px; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle, rgba(58,157,195,.14), transparent 52%), linear-gradient(135deg,#dce1e0,#c9cfce); }
.area-map::before { content: ""; position: absolute; inset: 0; opacity: .2; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px); background-size: 45px 45px; }
.area-map svg { position: relative; z-index: 2; width: 86%; max-width: 760px; overflow: visible; }
.map-line { fill: none; stroke: rgba(39,57,65,.23); stroke-width: 2; }
.map-line.faint { stroke-width: 1; stroke-dasharray: 5 9; }
.map-ring { fill: none; stroke: #2789b1; stroke-width: 1.5; opacity: .75; }
.map-ring.ring-2 { opacity: .35; }.map-ring.ring-3 { opacity: .15; }
.map-dot { fill: #167eaa; filter: drop-shadow(0 0 10px #fff); }
.area-map text { fill: #344349; font-family: var(--body); font-size: 10px; font-weight: 750; letter-spacing: 1.2px; }
.area-map .map-reading { fill: #18789f; font-family: var(--display); font-size: 13px; font-weight: 400; }
.area-map[data-mode="service"] .map-reading { opacity: 0; }
.area-map[data-mode="conditions"] .map-ring { opacity: .08; }
.area-map[data-mode="radar"] svg { filter: drop-shadow(0 1px 2px #fff); }
.radar-tiles { position: absolute; inset: 0; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; opacity: 0; filter: saturate(.75) contrast(.95); transition: opacity .4s; }
.area-map[data-mode="radar"] .radar-tiles { opacity: .56; }
.radar-tiles img { width: 100%; height: 100%; object-fit: cover; image-rendering: auto; }
.map-homebase { position: absolute; z-index: 4; left: 22px; top: 22px; display: flex; align-items: center; gap: 10px; padding: 10px 12px; color: #fff; background: rgba(13,19,21,.88); box-shadow: 0 9px 20px rgba(10,20,24,.18); }
.map-homebase img { width: 36px; height: 35px; object-fit: contain; border-radius: 50%; mix-blend-mode: screen; }
.map-homebase span { display: grid; color: #a7b2b6; font-size: 8px; letter-spacing: .09em; text-transform: uppercase; }.map-homebase b { color: #fff; font-size: 9px; }
.map-context { position: absolute; z-index: 5; left: 22px; right: 22px; bottom: 20px; max-width: 430px; padding: 18px 20px; color: #fff; background: rgba(12,18,20,.91); backdrop-filter: blur(10px); }
.map-context small { color: var(--air); font-size: 11px; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.map-context strong { display: block; margin-top: 5px; font-family: var(--body); font-size: 18px; font-weight: 800; line-height: 1.08; text-transform: uppercase; }
.map-context p { margin: 8px 0 0; color: #bdc6c9; font-size: 13px; }
.map-context .text-link { color: #fff; }
.area-copy { align-self: center; padding: 90px 5vw 90px max(48px, calc((100vw - 1360px)/2)); }
.area-copy h2 { font-size: clamp(105px, 10.8vw, 180px); }
.area-copy h2 em { color: #566267; }
.area-copy > p:not(.eyebrow):not(.area-note) { color: #5c676c; font-size: 17px; }
.area-note { margin: 45px 0 5px; color: #657278; font-size: 13px; text-transform: uppercase; }
.big-phone { min-height: 44px; display: inline-flex; align-items: center; color: #111719; font-family: var(--display); font-size: clamp(38px, 3.7vw, 58px); font-weight: 400; letter-spacing: .045em; }
.big-phone span { color: var(--air); font-size: .5em; }

.faq-section { background: #f5f5f1; }
.faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; }
.faq-layout h2 { font-size: clamp(100px,10vw,170px); }.faq-layout > div:first-child > p:last-child { max-width: 420px; color: #657075; }
.faq-list { border-top: 1px solid #aeb5b8; }
.faq-list details { border-bottom: 1px solid #aeb5b8; }
.faq-list summary { min-height: 86px; display: grid; grid-template-columns: 1fr 30px; align-items: center; gap: 20px; cursor: pointer; list-style: none; font-family: var(--body); font-size: 18px; font-weight: 750; line-height: 1.35; }
.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary span { color: #2c7d9d; font-size: 25px; transition: transform .2s; }.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { max-width: 700px; margin: -5px 40px 28px 0; color: #5b666b; }.faq-list details a { min-height: 44px; display: inline-flex; align-items: center; color: #155b77; font-weight: 800; text-decoration: underline; }

.air-gauge { position: fixed; z-index: 80; right: 12px; top: 50%; width: 28px; display: grid; justify-items: center; gap: 9px; padding: 10px 5px; transform: translateY(-50%); color: #aeb7bb; background: rgba(8,11,12,.76); border: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(8px); }
.air-gauge b, .air-gauge span { writing-mode: vertical-rl; font-family: var(--body); font-size: 7px; letter-spacing: .2em; text-transform: uppercase; }
.air-gauge span { color: var(--air); }
.air-gauge div { display: grid; gap: 4px; }
.air-gauge i { position: relative; width: 12px; height: 2px; display: block; background: #3f484c; transition: background .3s, box-shadow .3s; }
.air-gauge i.active { background: var(--air); box-shadow: 0 0 8px rgba(145,217,246,.8); }
.air-gauge i.active:nth-child(3n)::after { content: ""; position: absolute; right: 10px; top: -7px; width: 28px; height: 14px; border-top: 1px solid rgba(145,217,246,.3); border-radius: 50%; animation: gauge-air 2.8s ease-out infinite; }
@keyframes gauge-air { from { opacity: .7; transform: translateX(0) scaleX(.4); } to { opacity: 0; transform: translateX(-18px) scaleX(1.2); } }

.final-cta { position: relative; min-height: 650px; display: grid; grid-template-columns: 1fr .7fr; align-items: center; gap: 50px; padding: 100px max(48px, calc((100vw - 1360px)/2)); overflow: clip; contain: paint; background: radial-gradient(circle at 31% 50%, #172026, #07090a 40%); }
.final-video { position: absolute; z-index: 0; inset: 0 0 0 auto; width: 50%; height: 100%; opacity: .25; filter: grayscale(.55) saturate(.6) contrast(1.15); -webkit-mask-image: linear-gradient(90deg, transparent, #000 38%); mask-image: linear-gradient(90deg, transparent, #000 38%); }
.final-cta > img { position: absolute; left: 50%; right: auto; top: 50%; width: min(55vw, 700px); height: auto; transform: translate(-50%,-50%); opacity: .14; mix-blend-mode: screen; border-radius: 50%; }
.final-cta > div { position: relative; z-index: 2; }
.final-cta h2 { font-size: clamp(140px, 14vw, 220px); }
.final-cta > div > p:not(.eyebrow) { color: #9ca7ab; }
.final-actions { display: grid; gap: 14px; max-width: 390px; margin-left: auto; }
.final-actions small { margin-top: 12px; color: #aab4b8; font-size: 12px; font-weight: 700; letter-spacing: .065em; text-transform: uppercase; }
.site-footer { position: relative; isolation: isolate; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 45px; padding: 54px max(48px, calc((100vw - 1360px)/2)) 48px; overflow: hidden; color: #bdc8cc; background: radial-gradient(ellipse at 55% -35%, rgba(145,217,246,.2), transparent 48%), linear-gradient(180deg, #0b1215 0%, #050708 72%); border-top: 1px solid rgba(208,239,250,.48); box-shadow: inset 0 10px 36px rgba(157,224,248,.045); font-size: 14px; }
.site-footer::before { content: ""; position: absolute; z-index: -1; inset: -58px 0 auto; height: 135px; opacity: .72; background: radial-gradient(ellipse at 8% 65%, rgba(236,249,255,.25), transparent 20%), radial-gradient(ellipse at 34% 40%, rgba(145,217,246,.2), transparent 19%), radial-gradient(ellipse at 66% 62%, rgba(229,247,255,.19), transparent 22%), radial-gradient(ellipse at 92% 38%, rgba(121,202,235,.18), transparent 18%); filter: blur(13px); pointer-events: none; }
.site-footer::after { content: ""; position: absolute; z-index: -1; inset: 0 0 auto; height: 2px; background: linear-gradient(90deg, transparent 2%, rgba(255,255,255,.82) 22%, var(--air) 50%, rgba(255,255,255,.68) 77%, transparent 98%); box-shadow: 0 0 18px rgba(145,217,246,.5); pointer-events: none; }
.site-footer > div { position: relative; z-index: 1; display: grid; align-content: start; gap: 5px; }
.site-footer b { color: #fff; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.site-footer a { min-height: 44px; display: inline-flex; align-items: center; color: var(--air); font-weight: 800; }
.footer-brand { display: flex !important; flex-direction: row; align-items: center; gap: 14px !important; }
.footer-brand img { width: 54px; height: 53px; object-fit: contain; border-radius: 50%; mix-blend-mode: screen; }
.footer-brand > div { display: grid; }

.emergency-tab { position: fixed; z-index: 90; right: -1px; bottom: 23%; min-height: 48px; padding: 0 18px; color: #fff; background: #a6402e; border: 1px solid rgba(255,255,255,.24); cursor: pointer; font-size: 10px; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; transform: rotate(-90deg) translateX(50%); transform-origin: right bottom; }
.emergency-tab span { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: #ffc1b2; }
.mobile-action-rail { display: none; }
dialog { border: 0; padding: 0; }
dialog::backdrop { background: rgba(0,0,0,.74); backdrop-filter: blur(8px); }
.dialog-close { position: absolute; z-index: 2; top: 18px; right: 18px; width: 46px; height: 46px; padding: 0; color: currentColor; background: transparent; border: 1px solid currentColor; cursor: pointer; font-size: 28px; line-height: 1; }
.emergency-dialog { width: min(580px, calc(100% - 30px)); padding: 60px; color: #fff; background: radial-gradient(circle at 100% 0, rgba(145,217,246,.2), transparent 40%), #0a0e10; border: 1px solid rgba(255,255,255,.18); }
.emergency-dialog h2 { font-size: clamp(54px, 8vw, 86px); }
.emergency-dialog > p:not(.eyebrow) { color: #aeb8bc; }
.emergency-number { display: block; margin: 30px 0 22px; color: var(--air); font-family: var(--display); font-size: clamp(44px, 7.5vw, 70px); font-weight: 400; letter-spacing: .045em; }
.emergency-dialog .button { width: 100%; }
.emergency-dialog .text-link { display: block; margin: 18px auto 0; color: #bec6c9; }
.quote-dialog { width: min(780px, calc(100% - 30px)); max-height: min(90vh, 900px); padding: 54px; color: #111719; background: var(--paper); overflow-y: auto; }
.quote-dialog h2 { margin-bottom: 28px; font-size: clamp(48px, 7vw, 76px); }
.quote-dialog .dialog-close { color: #111719; }
.quote-dialog form { display: grid; gap: 22px; }
.quote-dialog fieldset { padding: 0; border: 0; }
.quote-dialog legend, .quote-dialog label { display: grid; gap: 7px; color: #273238; font-size: 13px; font-weight: 800; letter-spacing: .065em; text-transform: uppercase; }
.choice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
.choice-grid label { display: block; }
.choice-grid input { position: absolute; opacity: 0; }
.choice-grid span { min-height: 50px; display: grid; place-items: center; padding: 8px; border: 1px solid #b9c0c2; cursor: pointer; font-size: 11px; text-align: center; }
.choice-grid input:checked + span { color: #fff; background: #101416; border-color: #101416; }
.choice-grid input:focus-visible + span { outline: 3px solid var(--air); outline-offset: 2px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.quote-dialog input, .quote-dialog textarea { width: 100%; min-height: 48px; padding: 10px 12px; color: #101416; background: #fff; border: 1px solid #b9c0c2; text-transform: none; }
.quote-dialog textarea { resize: vertical; }
.form-note { margin: 0; color: #59666c; font-size: 13px; }
.form-note a { color: #143f53; font-weight: 800; text-decoration: underline; }
.form-success { padding: 14px; color: #0a3b2c; background: #d8f3e7; }

@media (max-width: 1160px) {
  :root { --shell: calc(100% - 56px); }
  .site-header { grid-template-columns: auto 1fr; padding: 0 28px; }
  .desktop-nav { display: none; }
  .header-actions { justify-self: end; }
  .menu-toggle { display: block; }
  .hero-copy { width: 57vw; margin-left: 40px; }
  .hero-mark { left: 50%; right: auto; width: 67vw; }
  .trust-rail { padding: 0 28px; }
  .trust-rail > div { padding-inline: 18px; }
  .need-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .need-card { min-height: 175px; }
  .need-response { grid-template-columns: .55fr 1fr; }
  .need-response > div:last-child { grid-column: 1/-1; display: flex; gap: 28px; }
  .commercial-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto 360px 360px; }
  .commercial-intro { grid-column: 1/-1; }
  .work-card-wide { grid-row: 2 / 4; grid-column: 2; }
  .trust-facts { grid-template-columns: 1fr 1fr; }
  .living-map { margin-right: 28px; }
}

@media (max-width: 760px) {
  .hero-video { inset: 0; width: 100%; opacity: .18; -webkit-mask-image: none; mask-image: none; animation-name: hero-video-in-mobile; }
  @keyframes hero-video-in-mobile { from { opacity: 0; transform: scale(1.018); } to { opacity: .18; transform: scale(1); } }
  .vent-video { opacity: .24; }
  .trust-video { width: 100%; opacity: .055; -webkit-mask-image: none; mask-image: none; }
  .final-video { width: 100%; opacity: .16; -webkit-mask-image: linear-gradient(0deg, #000, transparent 88%); mask-image: linear-gradient(0deg, #000, transparent 88%); }
  :root { --shell: calc(100% - 36px); }
  body { padding-bottom: 64px; }
  .site-header, .site-header.is-scrolled { height: 70px; padding: 0 18px; }
  .weather-rail { top: 70px; min-height: 42px; grid-template-columns: auto auto 1fr; gap: 10px; padding: 0 18px; font-size: 11px; letter-spacing: .07em; }
  .weather-rail span:nth-of-type(3), .weather-rail span:nth-of-type(4) { display: none; }
  .weather-rail strong { font-size: 10px; line-height: 1.2; text-align: right; }
  .brand-logo { width: 46px; height: 46px; flex-basis: 46px; }
  .brand strong { font-size: 29px; }.brand small { font-size: 10px; letter-spacing: .36em; margin-top: 7px; }
  .header-phone, .header-actions > .button { display: none; }
  .menu-toggle { width: 44px; height: 44px; }
  .hero { min-height: 0; height: auto; display: block; padding: 136px 0 0; }
  .hero::before { background: linear-gradient(0deg, rgba(3,5,6,.99) 17%, rgba(3,5,6,.75) 57%, rgba(3,5,6,.24)); }
  .hero-mark { width: 90vw; left: 50%; right: auto; top: 38%; opacity: .46; }
  .technical-grid { background-size: 48px 48px; }
  .air-field { opacity: .35; }
  .hero-copy { width: auto; margin: 0 18px; padding: 0; }
  .hero-copy::before { display: none; }
  .eyebrow { font-size: 11px; letter-spacing: .13em; }
  .hero h1 { font-size: clamp(86px, 25vw, 110px); }
  .hero-intro { width: 86%; margin-top: 18px; font-size: 16px; }
  .hero-actions { align-items: stretch; }
  .hero-actions .button { width: 100%; }
  .emergency-inline { margin-top: 10px; font-size: 12px; }
  .legacy-note { display: none; }
  .hero-side-note { display: none; }
  .trust-rail { position: relative; inset: auto; min-height: 0; margin-top: 28px; padding: 0 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .trust-rail > div { min-height: 102px; display: grid; place-content: center; gap: 7px; padding: 14px 10px; text-align: center; border-bottom: 1px solid var(--line); }
  .trust-rail strong { font-size: 32px; }.trust-rail span { font-size: 11px; letter-spacing: .05em; }
  .section-shell { padding: 82px 0; }
  .air-transition { height: 130px; }
  .linear-vent { top: 36px; width: 84vw; height: 34px; gap: 4px; padding: 7px 10px; }
  .vent-air { top: 62px; width: 80vw; }
  .split-heading { grid-template-columns: 1fr; gap: 22px; }
  .section-heading { margin-bottom: 35px; }
  .section-heading h2 { font-size: 76px; }
  .help-section .section-heading h2 { font-size: 72px; }
  .split-heading > p { font-size: 16px; }
  .help-section .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .help-section .split-heading > p { justify-self: start; }
  .emergency-bar { min-height: 82px; grid-template-columns: 26px 1fr auto; gap: 8px 12px; padding: 12px 14px; }
  .emergency-bar span { grid-column: 2 / 4; grid-row: 2; }
  .emergency-bar b { grid-column: 3; grid-row: 1; font-size: 11px; }
  .need-grid { grid-template-columns: 1fr 1fr; }
  .need-card[data-need="commercial"] { grid-column: 1 / -1; }
  .need-card { min-height: 150px; padding: 17px 14px; }
  .need-card b { font-size: 23px; }.need-card small { font-size: 13px; }
  .need-response { grid-template-columns: 1fr; gap: 18px; padding: 23px 20px; }
  .response-status { padding-bottom: 17px; border-right: 0; border-bottom: 1px solid var(--line); }
  .need-response > div:last-child { grid-column: auto; display: grid; gap: 4px; }
  .legacy-section { min-height: auto; grid-template-columns: 1fr; }
  .legacy-photo { min-height: 440px; background: linear-gradient(0deg, #090c0d, transparent 55%), url("assets/spiral-duct-brick.webp") 50% center/cover; }
  .legacy-copy { padding: 0 18px 80px; margin-top: -25px; }
  .legacy-number { top: -70px; right: 0; font-size: 220px; }
  .legacy-copy h2 { font-size: 82px; }
  .name-evolution { gap: 13px; }.name-evolution strong { font-size: 18px; }
  .vertical-caption { display: none; }
  .services-layout { grid-template-columns: 1fr; }
  .service-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-tabs button { min-height: 74px; grid-template-columns: 25px 1fr auto; padding: 0 12px; font-size: 20px; border-right: 1px solid #bcc2c4; }
  .service-tabs button:nth-child(3) { border-bottom: 0; }
  .service-panel { min-height: 640px; }
  .service-panel::after { background: linear-gradient(0deg, rgba(5,7,8,.97) 32%, rgba(5,7,8,.18)); }
  .service-panel > img { height: 52%; }
  .service-panel-copy { width: 100%; padding: 275px 22px 30px; }
  .service-panel h3 { font-size: 82px; }
  .equipment-note { grid-template-columns: 1fr; gap: 10px; }
  .trust-intro { grid-template-columns: 1fr; gap: 20px; }.trust-intro .eyebrow { grid-column: auto; margin-bottom: 0; }.trust-intro h2 { font-size: 80px; }
  .trust-facts { grid-template-columns: 1fr 1fr; }.trust-facts article { min-height: 270px; padding: 18px; }.trust-facts strong { margin: 28px 0 18px; font-size: 64px; }.trust-facts h3 { font-size: 18px; }
  .diamond-line { grid-template-columns: 1fr; gap: 5px; }
  .proof-section { grid-template-columns: 1fr; }
  .proof-image { min-height: 390px; background: linear-gradient(0deg,#0a0d0f,transparent 50%),url("assets/spiral-duct-gallery.webp") center/cover; }
  .proof-copy { padding: 10px 18px 80px; }
  .proof-copy h2 { font-size: 78px; }
  .proof-timeline { gap: 8px; }.proof-timeline b { font-size: 15px; }.proof-timeline span { font-size: 12px; }
  .commercial-grid { display: grid; grid-template-columns: 1fr; grid-template-rows: auto repeat(3, 360px); }
  .commercial-intro, .work-card-wide { grid-column: auto; grid-row: auto; }
  .commercial-intro { padding: 0; }.commercial-intro h2 { font-size: 76px; }
  .area-section { grid-template-columns: 1fr; }
  .area-copy { order: 1; }.living-map { order: 2; margin: 0 18px 75px; }
  .map-toolbar { align-items: flex-start; flex-direction: column; gap: 8px; padding: 12px; }.map-tabs { width: 100%; }.map-tabs button { flex: 1; min-width: 0; padding: 0 6px; font-size: 10px; }
  .area-map { min-height: 520px; }.area-map svg { width: 112%; transform: translateY(-15px); }
  .map-homebase { left: 12px; top: 12px; }.map-context { left: 12px; right: 12px; bottom: 12px; }
  .area-copy { padding: 60px 18px 80px; }
  .area-copy h2 { font-size: 82px; }
  .faq-layout { grid-template-columns: 1fr; gap: 45px; }.faq-layout h2 { font-size: 80px; }.faq-list summary { min-height: 78px; font-size: 18px; }
  .final-cta { min-height: 720px; grid-template-columns: minmax(0, 1fr); align-content: center; padding: 80px 18px; }
  .final-cta > div { min-width: 0; }
  .final-cta > img { width: 115vw; left: 50%; right: auto; opacity: .12; }
  .final-cta h2 { font-size: 110px; }
  .final-actions { width: 100%; max-width: 100%; margin: 0; }
  .site-footer { grid-template-columns: 1fr 1fr; padding: 42px 18px; gap: 30px 20px; }
  .footer-brand { grid-column: 1/-1; }
  .emergency-tab { display: none; }
  .air-gauge { display: none; }
  .mobile-action-rail { position: fixed; z-index: 95; inset: auto 0 0; height: 64px; display: grid; grid-template-columns: 1fr 1fr; background: #060809; border-top: 1px solid rgba(255,255,255,.18); }
  .mobile-action-rail a, .mobile-action-rail button { display: grid; place-items: center; min-width: 0; color: #fff; background: transparent; border: 0; font-size: 13px; font-weight: 850; letter-spacing: .065em; text-transform: uppercase; }
  .mobile-action-rail button { color: #071014; background: var(--air); }
  .emergency-dialog, .quote-dialog { padding: 52px 22px 30px; }
  .choice-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 370px) {
  .brand span { display: none; }
  .hero h1 { font-size: 80px; }
  .hero-intro { font-size: 16px; }
  .need-card { min-height: 142px; }
  .need-card b { font-size: 21px; }
  .trust-rail strong { font-size: 28px; }
  .service-tabs button { grid-template-columns: 20px minmax(0, 1fr); padding-inline: 9px; font-size: 20px; }
  .service-tabs button i { display: none; }
  .legacy-copy h2, .proof-copy h2, .commercial-intro h2 { font-size: 70px; }
}

/* Final responsive pass: preserve the composition while keeping mobile quick to scan. */
@media (max-width: 760px) {
  .hero h1 { font-size: clamp(52px, 15vw, 66px); line-height: .96; }
  .section-heading h2, .help-section .section-heading h2, .legacy-copy h2, .trust-intro h2, .proof-copy h2, .commercial-intro h2, .area-copy h2, .faq-layout h2 { font-size: clamp(42px, 12.5vw, 54px); line-height: .98; }
  .service-panel h3 { font-size: clamp(46px, 13vw, 58px); }
  .final-cta h2 { font-size: clamp(54px, 15vw, 72px); }
  .need-grid { grid-template-columns: 1fr; }
  .need-card, .need-card[data-need="commercial"] { min-height: 72px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; padding: 16px 15px; }
  .need-card > span { grid-column: 1; }
  .need-card b { grid-column: 1; grid-row: 2; margin: 0; font-size: 23px; }
  .need-card small { grid-column: 1; grid-row: 3; min-height: 0; margin: 0; }
  .need-card i { top: 50%; right: 16px; transform: translateY(-50%); }
  .service-tabs { grid-template-columns: 1fr; }
  .service-tabs button { min-height: 62px; grid-template-columns: 28px 1fr auto; border-right: 0; }
  .service-tabs button:nth-child(3) { border-bottom: 1px solid #bcc2c4; }
  .service-tabs button:last-child { border-bottom: 0; }
}

@media (min-width: 761px) {
  .hero h1 { font-size: clamp(64px, 5.4vw, 76px); font-weight: 800; letter-spacing: .015em; }
  .section-heading h2, .help-section .section-heading h2, .legacy-copy h2, .trust-intro h2, .proof-copy h2, .commercial-intro h2, .area-copy h2, .faq-layout h2 { font-size: clamp(48px, 4.2vw, 58px); font-weight: 800; letter-spacing: .01em; }
  .service-panel h3 { font-size: clamp(48px, 4.3vw, 58px); font-weight: 800; letter-spacing: .01em; }
  .final-cta h2 { font-size: clamp(58px, 5.2vw, 72px); font-weight: 800; letter-spacing: .01em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .air-field { display: none; }
}