:root{--green:#003b33;--deep:#002b26;--ink:#172b28;--muted:#64736e;--paper:#f5f6f2;--line:#d6ddd7;--lime:#b5d2a4}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);font-family:Arial,Helvetica,sans-serif;background:var(--paper);font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%}header{height:98px;padding:16px 5%;display:flex;align-items:center;justify-content:space-between;background:#fff;position:relative;z-index:10}.brand{width:175px}.brand img{width:115px;height:58px;object-fit:contain}.brand span{font-size:8px;letter-spacing:1.7px;font-weight:bold;display:block}nav{display:flex;align-items:center;gap:34px;font-size:13px;font-weight:600}nav a:hover{color:#558369}.nav-cta{border:1px solid var(--line);padding:11px 22px}.nav-cta span{margin-left:26px}.menu-toggle{display:none}.hero{height:680px;min-height:590px;position:relative;color:#fff;overflow:hidden}.hero-image{position:absolute;width:100%;height:100%;object-fit:cover;object-position:center 53%}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,33,29,.91),rgba(0,29,25,.5) 52%,rgba(0,20,17,.12)),linear-gradient(0deg,rgba(0,24,21,.7),transparent 35%)}.hero-content{position:relative;padding:95px 7% 80px;max-width:1050px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--green);margin:0 0 26px}.eyebrow.light{color:#d4e4d9}.eyebrow span{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--lime);margin-right:10px}h1{font-size:clamp(40px,4.5vw,68px);line-height:1.09;letter-spacing:-2.7px;font-weight:500;margin:0 0 26px}h1 em{font-style:normal;color:#c0d8b4}.hero-description{max-width:460px;color:#d6dfda;font-size:18px;line-height:1.65;margin-bottom:32px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:34px;padding:17px 23px;font-size:13px;font-weight:700;transition:transform .2s,background .2s}.button:hover{transform:translateY(-3px)}.button.white{background:#fff;color:var(--green)}.button.dark{background:var(--green);color:white}.hero-bottom{position:absolute;bottom:0;left:7%;right:7%;border-top:1px solid #ffffff4a;padding:23px 0;display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.8px}.hero-bottom a span{margin-left:24px}.section{padding:95px 7%;scroll-margin-top:20px}h2{font-size:clamp(32px,3.1vw,47px);line-height:1.13;letter-spacing:-1.8px;font-weight:500;margin:0}p{margin:0 0 20px}.intro{display:grid;grid-template-columns:1fr 1fr;gap:10%}.intro-copy>p{color:var(--muted);font-size:15px}.intro-copy .lead{font-size:22px;line-height:1.5;color:var(--ink)}.text-link{display:inline-flex;border-bottom:1px solid var(--green);padding:8px 0;gap:45px;font-size:13px;font-weight:bold;margin-top:10px}.numbers{margin:0 7%;padding:35px 0 50px;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.numbers strong{display:block;font-size:48px;font-weight:400;letter-spacing:-2px;color:var(--green)}.numbers strong span{font-size:24px;letter-spacing:-1px}.numbers p{font-size:12px;color:var(--muted);margin:0}.specialties{background:#e9eee8}.section-heading{display:flex;justify-content:space-between;gap:60px;align-items:flex-end;margin-bottom:45px}.section-heading>p{max-width:340px;margin:0;color:var(--muted);font-size:15px}.services{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #bdcbbf}.services article{position:relative;padding:30px 24px 50px 0;margin-right:24px;border-right:1px solid #c8d2c9}.services article:last-child{border:0;margin:0}.service-number{font-size:11px;color:#6a8072}.services h3{font-weight:500;font-size:23px;line-height:1.2;margin:38px 0 18px}.services p{color:#5e7065;font-size:14px}.service-symbol{font-size:26px;position:absolute;bottom:0}.project-grid{display:grid;grid-template-columns:1fr 1fr;gap:45px 32px}.project.featured{grid-column:1/-1}.project img{width:100%;height:290px;object-fit:cover}.project.featured img{height:460px;object-position:center 55%}.project-meta{display:flex;align-items:center;justify-content:space-between;margin:20px 0 5px;gap:15px}.project-meta span{font-size:10px;letter-spacing:1.3px;color:var(--muted)}.project-meta strong{font-size:22px;font-weight:400}.project h3{font-size:27px;letter-spacing:-.7px;font-weight:500;margin:0 0 8px}.project p{font-size:13px;color:var(--muted)}.other-projects{margin-top:38px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}summary{padding:24px 0;cursor:pointer;display:flex;justify-content:space-between;font-size:15px;list-style:none}summary::-webkit-details-marker{display:none}summary span{font-size:24px}details[open] summary span{transform:rotate(45deg)}table{border-collapse:collapse;width:100%;font-size:13px;text-align:left}caption{text-align:left;font-size:11px;color:var(--muted);padding-bottom:20px}td,th{padding:14px 12px;border-top:1px solid var(--line)}th{color:var(--green)}.table-wrap{overflow-x:auto;padding-bottom:25px}.operational{background:var(--green);color:white}.operational .section-heading>p{color:#bfd0c8}.fleet{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #ffffff3b;padding-top:35px;gap:25px}.fleet strong{font-size:53px;line-height:1;font-weight:400;display:block;margin-bottom:18px}.fleet span{font-size:13px;color:#c4d5cc}.data-note{font-size:10px;color:#bfd0c8;margin:30px 0 0}.safety{display:grid;grid-template-columns:1fr 1fr;gap:7%;align-items:center}.safety-image{position:relative}.safety-image img{height:540px;width:100%;object-fit:cover}.safety-image>span{position:absolute;bottom:0;left:0;background:var(--green);color:#fff;font-size:10px;letter-spacing:1.5px;padding:18px 22px}.safety h2{margin-bottom:25px}.safety p:not(.eyebrow){font-size:15px;color:var(--muted)}.safety-list{list-style:none;padding:0;margin:25px 0 0}.safety-list li{padding:13px 0;border-top:1px solid var(--line);font-size:13px}.safety-list li:before{content:'↗';color:var(--green);margin-right:15px}.contact{background:#e9eee8}.contact .section-heading{align-items:center}.contact-fields{border-top:1px solid #bdcbbf;padding-top:30px;display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px}.contact-fields>div>span:first-child{font-size:10px;letter-spacing:1.6px;color:#596f62}.contact-fields p{font-size:14px;margin-top:12px}.empty-contact{display:block;height:44px}footer{background:var(--deep);color:#c0cec8;padding:45px 7%;display:flex;align-items:center;justify-content:space-between;gap:25px}footer p{font-size:10px;margin:0}.footer-brand{color:white;font-size:38px;font-weight:900;font-style:italic;line-height:1}.footer-brand span{display:block;font-size:7px;letter-spacing:1.4px;font-style:normal;margin-top:8px}footer>a:last-child{font-size:25px;border:1px solid #ffffff40;width:45px;height:45px;text-align:center}.skip{position:fixed;top:-100px;left:10px;background:#fff;padding:12px;z-index:100}.skip:focus{top:10px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #71a785;outline-offset:5px}@media(min-width:1600px){.section{padding-left:max(7%,calc((100vw - 1380px)/2));padding-right:max(7%,calc((100vw - 1380px)/2))}}@media(max-width:850px){header{height:85px}.menu-toggle{display:flex;gap:15px;align-items:center;border:0;background:transparent;padding:12px;color:var(--green)}nav{display:none;position:absolute;top:85px;left:0;right:0;background:white;padding:24px 7%;flex-direction:column;align-items:stretch;gap:20px}nav.open{display:flex}.brand img{height:45px;width:90px}.brand span{font-size:7px}.hero{height:650px}.hero-content{padding-top:90px}.hero-shade{background:linear-gradient(90deg,#00211de6,#00211d66)}h1{font-size:49px}.section{padding:65px 7%}.intro{gap:35px;grid-template-columns:1fr}.numbers{grid-template-columns:1fr 1fr;row-gap:25px}.section-heading{display:block}.section-heading>p{margin-top:25px}.services{grid-template-columns:1fr 1fr;gap:30px}.services article{border:0}.services h3{margin-top:22px}.project.featured img{height:350px}.project img{height:220px}.safety{grid-template-columns:1fr;gap:40px}.safety-image img{height:370px}.contact .button{margin-top:30px}.fleet{grid-template-columns:1fr 1fr;row-gap:30px}footer{flex-wrap:wrap}footer p{max-width:210px}}@media(max-width:520px){h1{font-size:39px;letter-spacing:-1.7px}.hero{height:660px}.hero-content{padding-top:75px}.hero-description{font-size:16px}.hero-bottom{font-size:8px;letter-spacing:1px}.hero-bottom a span{margin-left:7px}.eyebrow{font-size:9px;letter-spacing:1.5px}h2{font-size:34px}.numbers strong{font-size:40px}.services{gap:25px 15px}.services article{padding-right:0;margin-right:0}.services h3{font-size:21px}.services p{font-size:13px}.project-grid{grid-template-columns:1fr;gap:30px}.project.featured{grid-column:auto}.project.featured img,.project img{height:265px}.project h3{font-size:24px}.project-meta span{font-size:9px}.contact-fields{grid-template-columns:1fr;gap:15px}.empty-contact{height:25px}.safety-image img{height:340px}footer{gap:25px 40px}footer p{max-width:180px}.fleet strong{font-size:44px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Compact language dropdown in the BHT palette. */
.language-switch{position:relative;margin-left:22px;flex-shrink:0;font-size:12px;letter-spacing:.5px;white-space:nowrap}.language-switch summary{display:flex;align-items:center;gap:9px;min-height:44px;padding:10px 12px;margin:0;border:1px solid var(--green);background:var(--green);color:#fff;font-size:12px;font-weight:700;cursor:pointer;list-style:none}.language-switch summary::-webkit-details-marker{display:none}.language-switch img{width:24px;height:18px;object-fit:cover;border-radius:50%;flex-shrink:0}.language-switch .language-chevron{font-size:17px;line-height:1;transition:transform .2s}.language-switch[open] .language-chevron{transform:rotate(180deg)}.language-options{position:absolute;top:calc(100% + 5px);right:0;min-width:100%;background:var(--deep);padding:4px;box-shadow:0 8px 24px #002b2626;border:1px solid #ffffff20;z-index:20}.language-options a{display:flex;align-items:center;gap:9px;padding:10px 8px;min-height:44px;color:#fff;font-weight:700}.language-options a:hover,.language-options a:focus-visible{background:#315d4e}.language-options a[aria-current="page"]{background:#52745d;color:#fff}.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}@media(min-width:851px){header nav{margin-left:auto;gap:clamp(16px,2.4vw,34px)}}@media(max-width:850px){header .brand{margin-right:auto}header .language-switch{order:1;margin-left:8px;margin-right:8px}header .menu-toggle{order:2}header nav{order:3}}
.language-switch summary>span{font-size:12px;transform:none}.language-switch[open] summary>span{transform:none}.language-switch summary>.language-chevron{font-size:17px}.language-switch[open] summary>.language-chevron{transform:rotate(180deg)}
@media(max-width:850px){header .brand{width:130px;flex-shrink:0}header .brand>span{white-space:nowrap}}@media(max-width:380px){header .brand{width:112px}header .brand>span{font-size:6px;letter-spacing:1.2px}header .menu-toggle{padding:8px;gap:8px;font-size:12px}}
/* Stronger contrast and comfortable reading sizes on both language versions. */
:root{--muted:#394d45}
body{font-size:18px;line-height:1.65}
nav{font-size:15px}
.intro-copy>p,.section-heading>p,.services p,.safety p:not(.eyebrow),.project p{font-size:18px;color:var(--muted)}
.intro-copy .lead{font-size:24px;color:var(--ink)}
.numbers p,.fleet span,.safety-list li,.contact-fields p,table{font-size:16px}
.services p{color:#344b3c}.service-number{font-size:13px;color:#405747}
.eyebrow{font-size:13px}.project-meta span{font-size:12px;color:#394d45}
.text-link,.button{font-size:15px}
summary{font-size:17px}caption{font-size:13px;color:var(--muted)}
.hero-description{font-size:20px;color:#fff}
.eyebrow.light,.operational .section-heading>p,.fleet span,.data-note,footer{color:#eef4ef}
.hero-bottom{font-size:12px;letter-spacing:1.2px}
.data-note,footer p{font-size:13px}
.contact-fields>div>span:first-child{font-size:12px;color:#344b3c}
.safety-image>span{font-size:12px}
@media(min-width:851px) and (max-width:1100px){header .brand{width:140px;flex-shrink:0}header nav{font-size:14px;gap:16px}.nav-cta{padding:11px 15px}.nav-cta span{margin-left:12px}.language-switch{margin-left:16px}}
@media(max-width:850px){.intro-copy>p,.section-heading>p,.services p,.safety p:not(.eyebrow),.project p{font-size:17px}.hero-description{font-size:18px}.intro-copy .lead{font-size:22px}}
@media(max-width:520px){.eyebrow{font-size:11px}.hero-bottom{font-size:9px;letter-spacing:.6px}.project-meta span{font-size:11px}.numbers p{font-size:15px}.services{column-gap:20px}.safety-image>span{font-size:10px}footer p{max-width:230px}}
/* Persistent navigation and instant section changes. */
html{scroll-behavior:auto;scroll-padding-top:110px}header{position:sticky;top:0;box-shadow:0 1px 0 #003b331a}nav>a{position:relative}nav>a[aria-current="location"]{color:var(--green)}nav>a[aria-current="location"]:after{content:'';position:absolute;left:0;right:0;bottom:-8px;height:2px;background:var(--green)}.section{scroll-margin-top:0}
.project-carousel{border-bottom:1px solid var(--line);padding-bottom:26px}.carousel-slide[hidden]{display:none}.carousel-slide img{height:460px;width:100%;object-fit:cover}.carousel-slide .text-link{margin-top:0}.carousel-controls{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:25px}.carousel-arrows{display:flex;gap:18px;align-items:center}.carousel-controls button{min-width:44px;min-height:44px;border:1px solid var(--green);background:transparent;color:var(--green);cursor:pointer;padding:8px 15px;font-weight:700}.carousel-controls button:hover{background:#e1e9e0}.carousel-controls button:focus-visible{outline:3px solid #71a785;outline-offset:4px}.carousel-arrows button{font-size:24px;line-height:1}.carousel-play{font-size:14px}.carousel-controls [data-count]{font-size:14px;font-variant-numeric:tabular-nums}.carousel-controls p{margin:0;color:var(--muted);font-size:13px;flex:1;min-width:200px}.project-detail>.eyebrow{margin-top:45px}.project-detail>h1{font-size:clamp(36px,4vw,62px);max-width:1000px}.project-detail figure{margin:40px 0}.project-detail figure img{width:100%;max-height:620px;object-fit:cover}.project-detail figcaption{font-size:14px;color:var(--muted);padding-top:14px}.project-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 0;margin-bottom:50px}.project-facts span{font-size:11px;letter-spacing:1px;color:var(--muted)}.project-facts p{margin:10px 0 0;font-size:18px}.scope-description{margin-top:25px}@media(max-width:850px){html{scroll-padding-top:98px}.carousel-slide img{height:340px}.project-facts{grid-template-columns:1fr 1fr}}@media(max-width:520px){.carousel-slide img{height:265px}.carousel-controls{gap:16px}.carousel-controls p{flex-basis:100%}.project-detail figure img{max-height:380px}.project-facts{gap:22px}.project-facts p{font-size:16px}}
/* Chronological project history. */
.history-overview{margin:65px 0 50px;padding:45px 0;border-top:1px solid var(--line)}.history-overview>h3{font-size:clamp(28px,3vw,38px);font-weight:500;letter-spacing:-1px;line-height:1.2;margin:0 0 20px}.history-overview>p:not(.eyebrow){max-width:850px;color:var(--muted)}.timeline-preview{list-style:none;padding:0;margin:35px 0 30px}.timeline-preview>li{display:grid;grid-template-columns:135px 1fr;gap:35px;position:relative;padding:0 0 30px 25px;margin-left:6px;border-left:1px solid #a8bbb0}.timeline-preview>li:before{content:'';position:absolute;top:7px;left:-5px;width:9px;height:9px;border-radius:50%;background:var(--green)}.timeline-date{font-size:18px;font-weight:700;color:var(--green)}.timeline-preview h4{font-size:21px;font-weight:500;margin:0 0 8px;line-height:1.3}.timeline-preview p{font-size:17px;color:var(--muted);margin:0;max-width:850px}.history-note{font-size:14px!important;line-height:1.7;color:var(--muted);max-width:980px}.history-overview .button{margin-top:12px}.history-page>.eyebrow{margin-top:45px}.history-page>h1{max-width:1000px}.history-lead{font-size:23px;max-width:850px;margin:30px 0}.history-page>.history-note{border-left:3px solid #a5b99c;padding:4px 0 4px 22px;margin-bottom:50px}.history-groups{margin-bottom:35px}.history-year{border-top:1px solid var(--line);scroll-margin-top:115px}.history-year:last-child{border-bottom:1px solid var(--line)}.history-year>summary{display:flex;align-items:center;justify-content:flex-start;gap:20px;padding:25px 0}.history-year>summary>strong{font-size:27px;font-weight:500;color:var(--green)}.history-year>summary>.year-count{font-size:14px;color:var(--muted);transform:none}.history-year>summary>.year-icon{margin-left:auto;font-size:25px}.timeline-records{list-style:none;padding:5px 0 15px;margin:0 0 0 8px}.timeline-records>li{position:relative;padding:0 0 34px 32px;border-left:1px solid #a8bbb0}.timeline-records>li:before{content:'';position:absolute;left:-5px;top:7px;width:9px;height:9px;border-radius:50%;background:var(--green)}.timeline-records article{max-width:980px}.record-date{font-size:14px;font-weight:700;color:var(--green);margin:0 0 12px}.timeline-records h2{font-size:25px;letter-spacing:-.5px;line-height:1.3;margin:0 0 12px}.timeline-records .record-client{font-size:15px;font-weight:700;color:var(--green);margin:0 0 10px}.timeline-records article>p:not(.record-date):not(.record-client){font-size:18px;color:var(--muted);margin-bottom:10px}.record-reference{font-size:12px;color:var(--muted)}@media(max-width:520px){.history-overview{margin-top:45px;padding-top:30px}.timeline-preview>li{grid-template-columns:1fr;gap:8px;padding-left:22px}.timeline-preview h4{font-size:20px}.timeline-preview p{font-size:16px}.history-lead{font-size:21px}.history-year>summary{gap:12px}.history-year>summary>strong{font-size:23px}.history-year>summary>.year-count{font-size:12px}.timeline-records h2{font-size:23px}.timeline-records article>p:not(.record-date):not(.record-client){font-size:17px}.history-year{scroll-margin-top:100px}}
.history-filters{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}.history-filters button{border:1px solid var(--green);background:transparent;color:var(--green);padding:12px 18px;font:inherit;font-size:15px;cursor:pointer}.history-filters button[aria-pressed="true"]{background:var(--green);color:white}.filter-note{font-size:14px;color:var(--muted);max-width:900px}.history-year[hidden],.timeline-records>li[hidden]{display:none}.record-photo{margin:24px 0 0;max-width:720px}.record-photo img{width:100%;max-height:420px;object-fit:cover}.record-photo figcaption{font-size:13px;color:var(--muted);line-height:1.5;padding-top:10px}.current-projects{padding:45px 0;border-top:1px solid var(--line);scroll-margin-top:115px}.current-projects h2{font-size:35px}.current-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}.current-grid article{border:1px solid var(--line);padding:25px;background:#e9eee8}.current-label{font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--green);font-weight:700}.current-grid h3{font-size:25px;line-height:1.2;font-weight:500;margin:20px 0 18px}.current-grid p{font-size:16px;color:var(--muted);margin:0}.current-grid .current-title{font-weight:700;color:var(--green);margin-bottom:12px}.timeline-current{border-left:2px solid var(--green)!important}.timeline-current:before{width:12px!important;height:12px!important;left:-7px!important}@media(max-width:850px){.current-grid{grid-template-columns:1fr}.current-grid h3{margin-top:12px}.record-photo img{max-height:320px}}
/* Keep the featured image, caption and controls together in the project viewport. */
.projects.section{padding-top:24px}.projects>.section-heading{margin-bottom:22px;gap:35px}.projects>.section-heading .eyebrow{margin-bottom:14px}.project-carousel .carousel-slide:not([hidden]){display:grid;grid-template-columns:minmax(0,1.8fr) minmax(260px,1fr);gap:30px;align-items:center}.project-carousel .carousel-slide>img{height:clamp(220px,calc(100svh - 350px),460px);width:100%;object-fit:cover}.slide-info{min-width:0}.slide-info .project-meta{margin-top:0;flex-wrap:wrap}.slide-info h3{font-size:27px}.slide-info p{font-size:17px;margin-bottom:12px}.slide-info .text-link{font-size:15px}.project-carousel .carousel-controls{margin-top:16px;gap:20px}.project-carousel{padding-bottom:18px}.current-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#portfolio-projects .timeline-records>li{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:25px}#portfolio-projects .timeline-records>li:before{display:none}#portfolio-projects .timeline-records{margin-left:0}
@media(max-width:850px){.projects>.section-heading h2{font-size:32px}.projects>.section-heading>p{margin-top:14px;font-size:16px;max-width:100%}.projects>.section-heading{margin-bottom:18px}.project-carousel .carousel-slide:not([hidden]){grid-template-columns:1fr;gap:15px}.project-carousel .carousel-slide>img{height:clamp(140px,calc(100svh - 540px),260px)}.slide-info .project-meta{margin-bottom:4px}.slide-info h3{font-size:23px;line-height:1.2;margin-bottom:8px}.slide-info p{font-size:16px;line-height:1.45;margin-bottom:8px}.slide-info .text-link{padding:4px 0}.project-carousel .carousel-controls{margin-top:12px;gap:12px}.project-carousel .carousel-controls p{font-size:12px;line-height:1.35}.current-grid{grid-template-columns:1fr}}
@media(min-width:851px) and (max-height:800px){.projects>.section-heading h2{font-size:36px}.projects>.section-heading>p{font-size:16px}.projects>.section-heading .eyebrow{margin-bottom:8px}.projects>.section-heading{margin-bottom:18px}.project-carousel .carousel-slide>img{height:clamp(220px,calc(100svh - 330px),390px)}}
@media(max-width:850px){.project-carousel .carousel-slide>img{height:clamp(110px,calc(100svh - 670px),220px)}}
/* Tighter opening on every project detail page. */
.project-detail.section{padding-top:24px}.project-detail>.text-link{margin-top:0;padding-top:0}.project-detail>.eyebrow{margin-top:22px;margin-bottom:14px}.project-detail>h1{margin-bottom:20px}.project-detail figure{margin-top:24px}@media(max-width:850px){.project-detail.section{padding-top:18px}.project-detail>.eyebrow{margin-top:18px}.project-detail figure{margin-top:20px}}