/* Richmond Hill Engineering Limited */
:root{
  --navy:#0f2238; --navy-2:#173152; --amber:#f2a900; --amber-d:#d18f00;
  --ink:#1b2430; --muted:#5b6673; --bg:#ffffff; --soft:#f4f2ed; --line:#e3e0d8;
  --radius:10px; --shadow:0 10px 30px rgba(15,34,56,.12);
  --head:'Barlow Condensed','Arial Narrow',Arial,sans-serif;
  --body:'Inter','Segoe UI',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--body);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:min(1180px,100% - 40px);margin-inline:auto}
h1,h2,h3,h4{font-family:var(--head);line-height:1.1;letter-spacing:.3px;text-transform:uppercase;color:var(--navy)}
h1{font-size:clamp(2.6rem,6vw,4.6rem)}
h2{font-size:clamp(2rem,4vw,3rem)}
h3{font-size:1.5rem}
p{color:var(--muted)}
.eyebrow{display:inline-block;font-family:var(--head);font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--amber-d);font-size:1.05rem;margin-bottom:10px}
.eyebrow::before{content:"";display:inline-block;width:34px;height:3px;background:var(--amber);vertical-align:middle;margin-right:10px}
.section{padding:90px 0}
.section.soft{background:var(--soft)}
.section.dark{background:var(--navy);color:#fff}
.section.dark h2,.section.dark h3{color:#fff}
.section.dark p{color:#c3cddb}
.sec-head{max-width:700px;margin-bottom:46px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head p{margin-top:14px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--head);font-weight:700;font-size:1.15rem;letter-spacing:1.5px;text-transform:uppercase;padding:14px 30px;border-radius:4px;border:2px solid var(--amber);background:var(--amber);color:var(--navy);cursor:pointer;transition:.25s}
.btn:hover{background:var(--amber-d);border-color:var(--amber-d);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn.ghost:hover{background:#fff;color:var(--navy);border-color:#fff}
.btn.navy{background:var(--navy);border-color:var(--navy);color:#fff}
.btn.navy:hover{background:var(--navy-2);border-color:var(--navy-2)}

/* top bar + header */
.topbar{background:var(--navy);color:#c3cddb;font-size:.88rem}
.topbar .container{display:flex;justify-content:space-between;gap:20px;padding:9px 0;flex-wrap:wrap}
.topbar a:hover{color:var(--amber)}
.topbar span{display:inline-flex;align-items:center;gap:8px}
.topbar svg{width:15px;height:15px;fill:var(--amber)}
header.site{position:sticky;top:0;z-index:50;background:#fff;box-shadow:0 2px 14px rgba(0,0,0,.07)}
header.site .container{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{height:52px;width:auto;flex:none;clip-path:inset(0 9% 0 0);margin-right:-6px}
.logo b{display:block;font-family:var(--head);font-size:1.45rem;letter-spacing:1px;text-transform:uppercase;color:var(--navy);line-height:1}
.logo small{display:block;font-size:.66rem;letter-spacing:3.2px;text-transform:uppercase;color:var(--amber-d);font-weight:700;margin-top:3px}
nav.main ul{display:flex;align-items:center;gap:6px}
nav.main a{font-family:var(--head);font-weight:600;font-size:1.12rem;letter-spacing:1.2px;text-transform:uppercase;padding:10px 16px;border-bottom:3px solid transparent;color:var(--navy)}
nav.main a:hover,nav.main a.active{border-color:var(--amber)}
nav.main a.cta{background:var(--amber);border-radius:4px;border:0;margin-left:10px}
nav.main a.cta:hover{background:var(--amber-d)}
.burger{display:none;background:none;border:0;cursor:pointer;width:44px;height:44px}
.burger span{display:block;width:26px;height:3px;background:var(--navy);margin:5px auto;transition:.3s}

/* hero */
.hero{position:relative;color:#fff;background:var(--navy) center/cover no-repeat;min-height:640px;display:flex;align-items:center}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,34,56,.78) 0%,rgba(15,34,56,.42) 45%,rgba(15,34,56,.05) 100%)}
.hero .container{position:relative;padding:90px 0}
.hero h1{color:#fff;max-width:800px}
.hero h1,.hero p.lead,.hero .tag{text-shadow:0 2px 14px rgba(0,0,0,.55)}
.hero h1 em{font-style:normal;color:var(--amber)}
.hero p.lead{color:#dbe3ee;max-width:640px;font-size:1.15rem;margin:22px 0 34px}
.hero .actions{display:flex;flex-wrap:wrap;gap:14px}
.hero .tag{font-family:var(--head);letter-spacing:3px;text-transform:uppercase;color:var(--amber);font-weight:600;font-size:1.15rem;margin-bottom:14px;display:block}
.page-hero{position:relative;background:var(--navy) center/cover no-repeat;color:#fff;padding:96px 0 84px}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(15,34,56,.94),rgba(15,34,56,.7))}
.page-hero .container{position:relative}
.page-hero h1{color:#fff;font-size:clamp(2.4rem,5vw,4rem)}
.page-hero p{color:#d3dce8;max-width:640px;margin-top:16px;font-size:1.1rem}
.crumbs{font-size:.85rem;letter-spacing:1px;text-transform:uppercase;color:var(--amber);margin-bottom:12px;font-weight:600}
.crumbs a:hover{text-decoration:underline}

/* call strip */
.strip{background:var(--amber);position:relative;z-index:2}
.strip .container{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding:26px 0}
.strip h3{font-size:1.9rem}
.strip p{color:var(--navy);opacity:.85}
.strip .phone{font-family:var(--head);font-size:2.2rem;font-weight:700;color:var(--navy);display:flex;align-items:center;gap:10px}
.strip .phone svg{width:30px;height:30px;fill:var(--navy)}

/* grids/cards */
.grid{display:grid;gap:28px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;transition:.3s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card::after{content:"";position:absolute;left:0;bottom:0;height:4px;width:0;background:var(--amber);transition:.35s}
.card:hover::after{width:100%}
.ico{width:64px;height:64px;border-radius:12px;background:var(--navy);display:grid;place-items:center;margin-bottom:22px}
.ico svg{width:34px;height:34px;fill:none;stroke:var(--amber);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card h3{margin-bottom:12px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tags span{font-size:.8rem;font-weight:600;background:var(--soft);color:var(--navy);padding:5px 12px;border-radius:30px;border:1px solid var(--line)}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split .imgs{position:relative}
.split .imgs img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;object-fit:cover}
.split .imgs .a{aspect-ratio:4/5}
.split .imgs .b{position:absolute;right:-24px;bottom:-30px;width:52%;aspect-ratio:1;border:8px solid #fff}
.split .txt p{margin-top:16px}
.split .txt .btn{margin-top:28px}
.checks li{display:flex;gap:12px;margin-top:14px;color:var(--ink);font-weight:500}
.checks li::before{content:"";flex:0 0 22px;height:22px;margin-top:2px;border-radius:50%;background:var(--amber) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='%230f2238' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stats b{display:block;font-family:var(--head);font-size:3.4rem;color:var(--amber);line-height:1}
.stats span{color:#c3cddb;font-size:.95rem}

/* steps */
.step{position:relative;padding:34px 28px;background:#fff;border-radius:var(--radius);border:1px solid var(--line);border-top:4px solid var(--amber)}
.step .n{font-family:var(--head);font-size:3.4rem;color:var(--amber);line-height:1;opacity:.9}
.step h3{margin:8px 0 10px;font-size:1.4rem}

/* project cards / gallery */
.pcard{position:relative;border-radius:var(--radius);overflow:hidden;display:block;aspect-ratio:4/3;background:var(--navy)}
.pcard img{width:100%;height:100%;object-fit:cover;transition:.6s}
.pcard:hover img{transform:scale(1.08)}
.pcard .cap{position:absolute;inset:auto 0 0 0;padding:60px 22px 20px;background:linear-gradient(transparent,rgba(15,34,56,.95));color:#fff}
.pcard .cap small{color:var(--amber);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:.72rem}
.pcard .cap h3{color:#fff;font-size:1.35rem;margin-top:4px}
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.filters button{font-family:var(--head);font-size:1.05rem;letter-spacing:1.2px;text-transform:uppercase;font-weight:600;padding:9px 22px;border:2px solid var(--line);background:#fff;border-radius:40px;cursor:pointer;color:var(--navy);transition:.2s}
.filters button:hover,.filters button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.project{padding:60px 0;border-top:1px solid var(--line)}
.project:first-of-type{border-top:0}
.project .meta{display:grid;grid-template-columns:1fr 2fr;gap:50px;align-items:start}
.badge{display:inline-block;background:var(--amber);color:var(--navy);font-weight:700;font-size:.72rem;letter-spacing:2px;text-transform:uppercase;padding:4px 12px;border-radius:3px;margin-bottom:12px}
.badge.on{background:var(--navy);color:#fff}
.project h2{font-size:clamp(1.7rem,3vw,2.3rem);margin-bottom:14px}
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.gal a{position:relative;display:block;aspect-ratio:4/3;overflow:hidden;border-radius:8px;background:var(--soft)}
.gal a.tall{grid-row:span 2;aspect-ratio:auto}
.gal img{width:100%;height:100%;object-fit:cover;transition:.5s}
.gal a:hover img{transform:scale(1.07)}
.gal a::after{content:"+";position:absolute;inset:0;display:grid;place-items:center;font-size:2.4rem;color:#fff;background:rgba(15,34,56,.55);opacity:0;transition:.3s}
.gal a:hover::after{opacity:1}
.gal a .lbl{position:absolute;left:8px;top:8px;z-index:1;background:var(--amber);color:var(--navy);font-size:.68rem;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;padding:3px 9px;border-radius:3px}
.videos{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:12px}
.videos video{width:100%;border-radius:8px;background:#000;aspect-ratio:16/9}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(6,14,24,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:30px}
.lb.open{display:flex}
.lb img{max-height:88vh;max-width:92vw;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.lb button{position:absolute;background:rgba(255,255,255,.12);border:0;color:#fff;font-size:2rem;width:52px;height:52px;border-radius:50%;cursor:pointer;transition:.2s}
.lb button:hover{background:var(--amber);color:var(--navy)}
.lb .x{top:18px;right:18px}.lb .p{left:18px;top:50%}.lb .n{right:18px;top:50%}
.lb .cnt{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:#c3cddb;font-size:.9rem}

/* cta band */
.cta-band{position:relative;background:var(--navy) center/cover no-repeat;color:#fff;text-align:center;padding:90px 0}
.cta-band::before{content:"";position:absolute;inset:0;background:rgba(15,34,56,.9)}
.cta-band .container{position:relative}
.cta-band h2{color:#fff;max-width:760px;margin:0 auto 16px}
.cta-band p{color:#d3dce8;max-width:640px;margin:0 auto 32px}
.cta-band .actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* contact */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:50px}
.info-item{display:flex;gap:18px;margin-bottom:28px}
.info-item .ico{margin:0;flex:0 0 56px;width:56px;height:56px}
.info-item h4{font-size:1.2rem;margin-bottom:2px}
.info-item p,.info-item a{color:var(--muted)}
.info-item a:hover{color:var(--amber-d)}
form.box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px;box-shadow:var(--shadow)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{margin-bottom:18px}
label{display:block;font-weight:600;font-size:.88rem;margin-bottom:6px;color:var(--navy)}
input,select,textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:6px;font:inherit;color:var(--ink);background:#fbfaf8;transition:.2s}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--amber);background:#fff;box-shadow:0 0 0 3px rgba(242,169,0,.2)}
textarea{min-height:140px;resize:vertical}
.note{font-size:.82rem;margin-top:12px}
.map{margin-top:50px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.map iframe{display:block;width:100%;height:380px;border:0}

/* footer */
footer.site{background:#0a1826;color:#a9b5c5;padding-top:70px}
footer.site .cols{display:grid;grid-template-columns:1.5fr 1fr 1.3fr;gap:50px;padding-bottom:50px}
footer.site h4{color:#fff;font-size:1.3rem;margin-bottom:20px;position:relative;padding-bottom:12px}
footer.site h4::after{content:"";position:absolute;left:0;bottom:0;width:40px;height:3px;background:var(--amber)}
footer.site li{margin-bottom:10px}
footer.site a:hover{color:var(--amber)}
footer.site .logo b{color:#fff}
footer.site .logo img{background:#fff;border-radius:8px;padding:5px 7px;height:60px;clip-path:none;margin-right:0}
footer.site p{color:#a9b5c5;margin-top:16px;font-size:.95rem}
footer.site .c li{display:flex;gap:10px}
footer.site .c svg{flex:0 0 18px;width:18px;height:18px;fill:var(--amber);margin-top:4px}
.copy{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;font-size:.85rem;text-align:center}

.wa{position:fixed;right:18px;bottom:18px;z-index:60;background:var(--amber);color:var(--navy);width:58px;height:58px;border-radius:50%;display:none;place-items:center;box-shadow:var(--shadow)}
.wa svg{width:26px;height:26px;fill:var(--navy)}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* responsive */
@media(max-width:980px){
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .split,.contact-grid,.project .meta{grid-template-columns:1fr;gap:44px}
  .split .imgs .b{right:10px}
  .stats{grid-template-columns:repeat(2,1fr)}
  footer.site .cols{grid-template-columns:1fr 1fr}
  .burger{display:block}
  nav.main{position:absolute;left:0;right:0;top:78px;background:#fff;box-shadow:0 14px 24px rgba(0,0,0,.1);max-height:0;overflow:hidden;transition:max-height .35s}
  nav.main.open{max-height:480px}
  nav.main ul{flex-direction:column;align-items:stretch;padding:12px 20px 22px;gap:0}
  nav.main a{display:block;padding:14px 4px;border-bottom:1px solid var(--line)}
  nav.main a.cta{margin:14px 0 0;text-align:center;border-radius:4px}
  .wa{display:grid}
}
@media(max-width:640px){
  .section{padding:64px 0}
  .g2,.g3,.g4,.row,.gal,.videos{grid-template-columns:1fr}
  .gal{grid-template-columns:repeat(2,1fr)}
  .gal a.tall{grid-row:auto;aspect-ratio:4/3}
  footer.site .cols{grid-template-columns:1fr}
  .topbar .hide-s{display:none}
  form.box{padding:24px}
  .hero{min-height:560px}
  .strip .phone{font-size:1.8rem}
}
.copy .dev{display:block;margin-top:6px;font-size:.62rem;opacity:.75}
.copy .dev a{color:var(--amber)}
.copy .dev a:hover{text-decoration:underline}


.card.wide{grid-column:1/-1}
.checks.cols2{display:grid;grid-template-columns:1fr 1fr;column-gap:40px}
@media(max-width:640px){.checks.cols2{grid-template-columns:1fr}}