:root{--red:#e12b36;--ink:#171a1d;--paper:#f5f5f3;--gray:#74797d}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.55}a{color:inherit;text-decoration:none}button{font:inherit}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #e12b36;outline-offset:6px}header{height:94px;display:flex;align-items:center;justify-content:space-between;padding:0 4.8%;background:#fff;gap:30px;position:relative;z-index:10}.brand{display:flex;align-items:center;gap:12px;font-size:31px;letter-spacing:-1.3px;font-weight:800;line-height:1}.brand small{display:block;font-size:9px;letter-spacing:1.4px;line-height:1.5;margin-top:8px;font-weight:600}.brand-mark{background:var(--red);width:48px;height:49px;color:white;display:flex;align-items:center;justify-content:center;font-size:35px;font-weight:900;letter-spacing:-9px;padding-right:8px}.brand-mark span{transform:translateY(5px)}nav{display:flex;gap:30px;font-size:14px;font-weight:600}nav a:hover{color:var(--red)}.header-contact{border-bottom:1px solid var(--red);font-size:14px;font-weight:700;padding:10px 0}.menu{display:none}.hero{position:relative;color:white;min-height:680px;height:min(790px,calc(100svh - 94px));background:#1b1e21;isolation:isolate;overflow:hidden}.hero-picture,.hero-shade{position:absolute;inset:0;z-index:-2}.hero-picture{background:url('engine.webp') center center/cover no-repeat}.hero-shade{z-index:-1;background:linear-gradient(90deg,rgba(13,17,21,.95),rgba(13,17,21,.77) 38%,rgba(13,17,21,.12) 85%),linear-gradient(0deg,rgba(13,17,21,.85),transparent 30%)}.hero-content{padding:86px 4.8% 100px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:2.1px;margin:0 0 30px;display:flex;align-items:center;gap:12px}.eyebrow i{width:7px;height:7px;background:var(--red)}h1{font-size:clamp(46px,5.3vw,82px);font-weight:600;line-height:1.07;letter-spacing:-3.8px;margin:0 0 28px}em{font-style:normal;color:var(--red)}.hero-description{font-size:18px;color:#d4d7db;line-height:1.65;margin:0 0 32px}.actions{display:flex;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:16px 26px;font-size:14px;font-weight:700;transition:background .2s,transform .2s}.button:hover{transform:translateY(-2px)}.red{background:var(--red);color:#fff}.red:hover{background:#c8222c}.outline{border:1px solid #ffffff60}.outline:hover{background:#ffffff15}.hero-bottom{position:absolute;bottom:30px;left:4.8%;right:4.8%;display:flex;justify-content:space-between;align-items:center;font-size:11px;letter-spacing:2px;color:#c6cbd0}.hero-bottom b{font-weight:400;opacity:.55;margin-left:20px}.hero-index{position:absolute;right:4.8%;top:38px;font-size:11px;letter-spacing:2px;color:#bdc3c7}.sector-strip{min-height:84px;background:#202428;color:#dce0e2;padding:22px 6%;display:flex;align-items:center;justify-content:space-between;gap:24px;font-size:12px;letter-spacing:2px;font-weight:600}.sector-strip b{color:var(--red);font-size:22px;font-weight:300}.section{padding:88px 6% 98px}.section-label{display:flex;align-items:center;gap:26px;font-size:12px;font-weight:600;letter-spacing:1.8px;margin-bottom:48px}.line{flex:1;height:1px;background:#d6d8d9}.about-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:80px}h2{font-size:clamp(32px,3.25vw,48px);line-height:1.17;font-weight:500;letter-spacing:-1.8px;margin:0}.muted{color:#85898c}.about-copy p{color:#686d71;margin:0 0 20px}.about-copy .lead{font-size:21px;color:var(--ink);line-height:1.5}.facts{display:flex;gap:72px;margin-top:36px;padding-top:28px;border-top:1px solid #d6d8d9}.facts strong{display:block;font-size:36px;line-height:1.1;font-weight:500;letter-spacing:-1px}.facts span{display:block;font-size:13px;margin-top:10px;color:#74797d}.services{background:#e9ebeb}.section-heading{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:44px}.section-heading p{margin:0;color:#74797d;max-width:340px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.service-card{background:#fff;padding:32px 28px 0;position:relative;border-top:3px solid transparent;transition:border-color .2s}.service-card:hover,.service-card:focus-within{border-top-color:var(--red)}.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:45px}.number{font-size:13px;color:#858a8e}.card-top svg{width:44px;height:44px;fill:none;stroke:var(--red);stroke-width:1.5;stroke-linejoin:round;stroke-linecap:round}h3{font-size:24px;font-weight:500;letter-spacing:-.6px;line-height:1.3;margin:0 0 20px}.service-card p{font-size:15px;line-height:1.65;color:#72777a;min-height:100px;margin:0 0 25px}details{border-top:1px solid #ddd}summary{list-style:none;cursor:pointer;font-size:14px;font-weight:600;padding:20px 0;display:flex;justify-content:space-between;align-items:center}summary::-webkit-details-marker{display:none}summary span{color:var(--red);font-size:25px;font-weight:400;line-height:1}details[open] summary span{transform:rotate(45deg)}details ul{padding:0 0 22px 17px;color:#63686c;font-size:14px;margin:0}details li{margin:8px 0}.industries{background:var(--ink);color:#fff}.industries .line{background:#ffffff25}.industries .section-label{color:#aeb4b8}.industry-layout{display:grid;grid-template-columns:1fr 1fr;gap:10%}.industry-layout>div>p{color:#a2a9ad;margin-top:28px;font-size:17px}.industry-list article{display:flex;gap:30px;padding:26px 0;border-top:1px solid #ffffff25}.industry-list article:first-child{padding-top:0;border-top:0}.industry-list article:last-child{padding-bottom:0}.industry-list article>span{color:var(--red);font-size:12px;margin-top:5px}.industry-list h3{font-size:23px;margin-bottom:10px}.industry-list p{color:#a2a9ad;font-size:15px;margin:0}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:52px}.steps article{border-top:1px solid #c8cccf;padding-top:22px}.steps article>span{color:var(--red);font-size:13px}.steps h3{font-size:19px;margin:26px 0 13px}.steps p{font-size:15px;color:#72777a;margin:0}.contact{background:var(--red);color:#fff;padding-bottom:88px}.contact .line{background:#ffffff40}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:10%}.contact .eyebrow{font-size:11px;letter-spacing:1.5px;margin-bottom:22px}.contact h2{font-size:84px;line-height:.97;letter-spacing:-4px}.contact-grid>div>p:not(.eyebrow){color:#ffdae0;margin:25px 0}.white{background:white;color:var(--ink);margin-top:6px}.white:hover{background:#f0f0ee}.contact-details>div{padding:22px 0;border-bottom:1px solid #ffffff40}.contact-details>div:first-child{padding-top:0}.contact-details span{font-size:11px;letter-spacing:1.6px;display:block;margin-bottom:10px;color:#ffd4d9}.contact-details a,.contact-details>div>p{font-size:28px;line-height:1.25;margin:0;letter-spacing:-.6px}.contact-details .email{font-size:25px}.contact-details a:hover{text-decoration:underline}aside{margin-top:32px;max-width:460px}aside strong{font-size:14px;font-weight:600}aside p{font-size:14px;color:#ffd4d9;margin:10px 0 0}footer{background:#fff;display:flex;justify-content:space-between;align-items:center;gap:25px;padding:40px 6%}footer .brand{font-size:27px}footer p,footer>a:last-child{font-size:12px;color:#74797d}footer .brand small{font-size:8px} @media(min-width:1600px){.section{padding-left:max(6%,calc((100% - 1420px)/2));padding-right:max(6%,calc((100% - 1420px)/2))}}@media(max-width:1050px){nav{gap:18px}.header-contact{display:none}.about-grid{gap:38px}.service-card{padding:25px 22px 0}.service-card h3{font-size:21px}.industry-layout{gap:7%}.hero-bottom b{display:none}.contact-details .email{font-size:22px}}@media(max-width:760px){html{scroll-padding-top:70px}header{height:80px;padding:0 6%}.brand{font-size:27px}.brand-mark{width:40px;height:42px;font-size:30px}.brand small{font-size:8px;letter-spacing:1px}.menu{display:flex;flex-direction:column;gap:6px;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid #ddd;background:white}.menu span{width:18px;height:2px;background:var(--ink)}nav{display:none;position:absolute;top:80px;left:0;right:0;background:white;padding:24px 6%;box-shadow:0 12px 20px #0002;flex-direction:column;font-size:16px}nav.open{display:flex}.hero{min-height:640px;height:calc(90svh - 80px);max-height:780px}.hero-content{padding:74px 6% 90px}.hero-picture{background-position:61% center}.hero-shade{background:linear-gradient(90deg,#0d1115e6,#0d11157d),linear-gradient(0deg,#0d1115dd,transparent 55%)}.hero-index{display:none}.eyebrow{font-size:10px;letter-spacing:1.3px;margin-bottom:28px}h1{font-size:clamp(39px,7.7vw,58px);letter-spacing:-1.9px;line-height:1.12}.hero-description{font-size:16px}.actions{gap:10px;flex-wrap:wrap}.button{font-size:13px;padding:15px 20px;min-height:50px}.hero-bottom{left:6%;right:6%;bottom:26px;font-size:9px;letter-spacing:1px}.hero-bottom>span:last-child{display:none}.sector-strip{display:grid;grid-template-columns:1fr 1fr;padding:23px 6%;gap:16px;font-size:10px;letter-spacing:1.5px}.sector-strip b{display:none}.section{padding:58px 6% 64px}.section-label{font-size:10px;letter-spacing:1.3px;gap:18px;margin-bottom:34px}.about-grid,.industry-layout,.contact-grid{grid-template-columns:1fr;gap:32px}h2{font-size:34px;letter-spacing:-1.2px}.about-copy .lead{font-size:19px}.about-copy p{font-size:15px}.facts{gap:55px;margin-top:28px}.facts strong{font-size:31px}.section-heading{display:block;margin-bottom:30px}.section-heading p{margin-top:20px;font-size:15px}.service-grid{grid-template-columns:1fr;gap:14px}.service-card{padding:27px 26px 0}.card-top{margin-bottom:22px}.service-card h3{font-size:25px}.service-card p{min-height:0;max-width:450px}.industry-layout>div>p{font-size:16px}.industry-list article{gap:24px}.steps{grid-template-columns:1fr 1fr;gap:28px 22px;margin-top:32px}.steps h3{font-size:18px;margin-top:20px}.steps p{font-size:14px}.contact h2{font-size:72px}.contact-details{margin-top:12px}.contact-details a{font-size:27px}.contact-details .email{font-size:22px;overflow-wrap:anywhere}.contact-details>div>p{font-size:24px}footer{flex-wrap:wrap;padding:30px 6%;gap:22px}footer .brand{width:100%}footer p{margin:0}footer>a:last-child{margin-left:auto}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Original TetraTech identity and named contacts */
.brand.brand-original{display:flex;flex-direction:column;align-items:flex-start;gap:4px;width:285px;flex-shrink:0;letter-spacing:normal}
.brand-original .original-logo{display:block;width:100%;height:auto;object-fit:contain}
.brand.brand-original small{font-size:10px;letter-spacing:1px;line-height:1.4;margin:0 0 0 24%;white-space:nowrap}
.contact-details .contact-person{font-size:24px;line-height:1.3;letter-spacing:-.3px;margin:0 0 20px}
.contact-details .contact-email-label{margin-top:22px}
.contact-details .email{overflow-wrap:anywhere}
@media(max-width:760px){.brand.brand-original{width:245px;max-width:calc(100vw - 110px)}.brand.brand-original small{font-size:8px;letter-spacing:.7px}footer .brand.brand-original{width:285px;max-width:100%;flex-basis:auto}.contact-details .contact-person{font-size:22px}}