/* Ygen Engineering Ltd — site styles */
:root{
  --ink:#101b26;
  --navy:#0d3656;
  --navy-2:#154a73;
  --red:#b3262c;
  --paper:#f4f2ee;
  --white:#fff;
  --steel:#5b6773;
  --rule:#d9d5cc;
  --rule-dark:#2a3a49;
  --wrap:1200px;
  --gutter:clamp(18px,4vw,40px);
  --head:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --body:"IBM Plex Sans","Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font:400 16.5px/1.65 var(--body);color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-underline-offset:3px}
a:hover{color:var(--red)}
h1,h2,h3,h4{font-family:var(--head);font-weight:700;line-height:1.12;margin:0 0 .5em;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(2.2rem,5.2vw,4rem);letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,3vw,2.35rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
ul{margin:0;padding:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--red);outline-offset:2px}

/* top bar */
.topbar{background:var(--ink);color:#c9d2da;font-size:14px}
.topbar .wrap{display:flex;justify-content:space-between;gap:24px;padding-top:8px;padding-bottom:8px}
.topbar a{color:#e8edf1;text-decoration:none}
.topbar a:hover{color:#fff;text-decoration:underline}
.topbar ul{list-style:none;display:flex;gap:24px;flex-wrap:wrap}
.topbar .sister{display:flex;align-items:center;gap:8px}
.topbar .sister::before{content:"";width:6px;height:6px;background:var(--red)}

/* header */
.site-header{background:var(--white);border-bottom:1px solid var(--rule);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:78px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand img{width:42px;height:auto}
.brand b{display:block;font:700 1.05rem/1 var(--head);letter-spacing:.06em}
.brand small{display:block;font:600 .66rem/1.2 var(--head);letter-spacing:.2em;color:var(--steel);margin-top:4px;text-transform:uppercase}
.nav ul{list-style:none;display:flex;align-items:center;gap:clamp(14px,1.9vw,28px)}
.nav a{font:600 .92rem/1 var(--head);color:var(--ink);text-decoration:none;padding:30px 0;display:block;border-bottom:3px solid transparent;margin-bottom:-1px}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--red);color:var(--ink)}
.nav .cta{background:var(--navy);color:#fff;padding:13px 20px;margin:0;border:0}
.nav .cta:hover{background:var(--red);color:#fff;border:0}
.nav-toggle{display:none;background:none;border:1px solid var(--ink);padding:9px 14px;font:700 .85rem var(--head);letter-spacing:.08em;text-transform:uppercase;cursor:pointer;color:var(--ink)}
@media (max-width:1060px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--rule);box-shadow:0 12px 20px rgba(16,27,38,.08)}
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 20px}
  .nav a{padding:15px 0;border-bottom:1px solid var(--rule);margin:0}
  .nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--rule);color:var(--red)}
  .nav .cta{margin-top:14px;text-align:center}
  .topbar .wrap{justify-content:center}
  .topbar .tb-hide{display:none}
}

/* buttons */
.btn{display:inline-block;font:700 .9rem/1 var(--head);letter-spacing:.06em;text-transform:uppercase;text-decoration:none;padding:17px 28px;border:2px solid var(--navy);background:var(--navy);color:#fff;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn:hover{background:var(--red);border-color:var(--red);color:#fff}
.btn--ghost{background:transparent;border-color:#fff;color:#fff}
.btn--ghost:hover{background:#fff;border-color:#fff;color:var(--ink)}
.btn--line{background:transparent;color:var(--navy)}
.btn--line:hover{background:var(--navy);border-color:var(--navy);color:#fff}

/* hero */
.hero{position:relative;color:#fff;background:var(--ink) center/cover no-repeat;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;background:rgba(10,22,33,.62);z-index:-1}
.hero .wrap{padding-top:clamp(80px,13vw,170px);padding-bottom:clamp(70px,11vw,150px)}
.hero h1{color:#fff;max-width:14ch;margin-bottom:.35em}
.hero p{font-size:clamp(1.05rem,1.6vw,1.3rem);max-width:52ch;color:#e4eaef;margin-bottom:2em}
.hero .actions{display:flex;flex-wrap:wrap;gap:14px}
.eyebrow{display:flex;align-items:center;gap:12px;font:700 .8rem/1 var(--head);letter-spacing:.18em;text-transform:uppercase;color:var(--steel);margin-bottom:18px}
.eyebrow::before{content:"";width:28px;height:3px;background:var(--red)}
.hero p.eyebrow,.banner p.eyebrow{font-size:.8rem;max-width:none;margin:0 0 18px;line-height:1.5}
.hero p.eyebrow{color:#fff}

/* facts strip */
.facts{background:var(--navy);color:#fff}
.facts ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr)}
.facts li{padding:30px 24px;border-left:1px solid rgba(255,255,255,.18)}
.facts li:first-child{border-left:0;padding-left:0}
.facts strong{display:block;font:700 clamp(1.4rem,2.5vw,2rem)/1 var(--head);margin-bottom:10px;white-space:nowrap}
.facts span{font-size:.95rem;color:#c5d3df;display:block;line-height:1.4}
@media (max-width:820px){
  .facts ul{grid-template-columns:1fr 1fr}
  .facts li{border-left:0;padding:22px 0;border-top:1px solid rgba(255,255,255,.18)}
  .facts li:nth-child(-n+2){border-top:0}
  .facts li:nth-child(even){padding-left:20px;border-left:1px solid rgba(255,255,255,.18)}
}

/* sections */
.section{padding:clamp(56px,8vw,104px) 0}
.section--paper{background:var(--paper)}
.section--ink{background:var(--ink);color:#d6dde3}
.section--ink h2,.section--ink h3{color:#fff}
.section--ink .eyebrow{color:#9fb0be}
.section-head{max-width:760px;margin-bottom:clamp(30px,4vw,52px)}
.section-head p{color:var(--steel);font-size:1.1rem}
.section--ink .section-head p{color:#aebbc6}
.lead{font-size:1.2rem;line-height:1.6;color:#2b3947}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,6vw,84px);align-items:center}
.split--top{align-items:start}
.split img{width:100%}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.ph{background:var(--paper);display:block;width:100%}

/* services on home */
.svc{list-style:none}
.svc li{display:grid;grid-template-columns:70px 1fr 1.1fr;gap:clamp(18px,3vw,44px);padding:34px 0;border-top:1px solid var(--rule);align-items:center}
.svc li:last-child{border-bottom:1px solid var(--rule)}
.svc .n{font:700 1.1rem var(--head);color:var(--red);letter-spacing:.06em}
.svc h3{font-size:1.5rem;margin-bottom:.4em}
.svc p{color:var(--steel);margin:0 0 1em}
.svc img{aspect-ratio:3/2;object-fit:cover;width:100%}
.more{font:700 .85rem var(--head);letter-spacing:.1em;text-transform:uppercase;text-decoration:none;border-bottom:2px solid var(--red);padding-bottom:3px;color:var(--ink)}
.more:hover{color:var(--red)}
@media (max-width:860px){.svc li{grid-template-columns:1fr}.svc img{order:-1}}

/* featured projects (home) */
.feature-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.feature{position:relative;display:block;color:#fff;text-decoration:none;overflow:hidden;background:var(--ink);min-height:320px}
.feature img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.feature:hover img{transform:scale(1.04)}
.feature::after{content:"";position:absolute;inset:0;background:rgba(10,22,33,.38)}
.feature div{position:absolute;left:0;right:0;bottom:0;padding:24px;z-index:1;background:rgba(10,22,33,.78)}
.feature small{display:block;font:700 .72rem var(--head);letter-spacing:.16em;text-transform:uppercase;color:#c8d3dc;margin-bottom:6px}
.feature h3{color:#fff;margin:0;font-size:1.3rem}
.feature--lg{grid-row:span 2;min-height:560px}
@media (max-width:860px){.feature-grid{grid-template-columns:1fr}.feature--lg{min-height:360px}}

/* client list */
.client-list{list-style:none;columns:3;column-gap:40px}
.client-list li{padding:9px 0;border-bottom:1px solid var(--rule);break-inside:avoid;font-size:1rem}
.section--ink .client-list li{border-color:var(--rule-dark);color:#d6dde3}
.client-list--sm{columns:4;font-size:.95rem}
@media (max-width:900px){.client-list,.client-list--sm{columns:2}}
@media (max-width:520px){.client-list,.client-list--sm{columns:1}}

/* page banner */
.banner{background:var(--ink);color:#fff;padding:clamp(48px,7vw,88px) 0 clamp(40px,5vw,64px);border-bottom:4px solid var(--red)}
.banner p.eyebrow{color:#9fb0be}
.banner h1{color:#fff;font-size:clamp(2rem,4.4vw,3.2rem);margin-bottom:.3em}
.banner p{max-width:62ch;color:#c3cfd9;font-size:1.15rem;margin:0}

/* prose */
.prose{max-width:70ch}
.prose h3{margin-top:1.6em}
.prose ul,.checks{list-style:none}
.checks li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid var(--rule)}
.checks li::before{content:"";position:absolute;left:0;top:19px;width:12px;height:12px;border:3px solid var(--red);border-top:0;border-right:0;transform:rotate(-45deg) translateY(-3px) scale(.9)}
.section--ink .checks li{border-color:var(--rule-dark)}
.prose p{color:#2b3947}

/* values / numbered blocks */
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--rule)}
.cols-3>div{padding:28px 28px 28px 0;border-bottom:1px solid var(--rule)}
.cols-3 h3{font-size:1.1rem;margin-bottom:.35em}
.cols-3 p{color:var(--steel);margin:0;font-size:1rem}
@media (max-width:820px){.cols-3{grid-template-columns:1fr}}
.attrs{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--rule-dark)}
.attrs li{padding:22px 16px 0 0;font:700 1rem/1.3 var(--head);color:#fff}
.attrs li span{display:block;color:var(--red);font-size:.8rem;letter-spacing:.14em;margin-bottom:8px}
@media (max-width:820px){.attrs{grid-template-columns:1fr 1fr}.attrs li{padding-bottom:14px}}

/* team */
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.person img,.person .mono{width:100%;aspect-ratio:4/5;object-fit:cover;object-position:top;background:var(--paper)}
.person .mono{display:grid;place-items:center;font:700 3rem var(--head);color:var(--navy);background:#e5e9ed}
.person h3{margin:14px 0 2px;font-size:1.15rem}
.person p{margin:0;color:var(--steel);font-size:.95rem;line-height:1.45}
.person .role{font:700 .78rem var(--head);letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin-bottom:6px}
@media (max-width:900px){.team{grid-template-columns:1fr 1fr}}

/* service detail */
.svc-detail{display:grid;grid-template-columns:260px 1fr;gap:clamp(24px,5vw,70px);padding:clamp(36px,5vw,60px) 0;border-top:1px solid var(--rule)}
.svc-detail:first-of-type{border-top:0;padding-top:0}
.svc-detail h2{font-size:1.7rem}
.svc-detail .n{font:700 1rem var(--head);color:var(--red);letter-spacing:.1em;display:block;margin-bottom:10px}
.svc-detail img{width:100%;aspect-ratio:3/2;object-fit:cover;margin-top:22px}
@media (max-width:820px){.svc-detail{grid-template-columns:1fr}}

/* projects */
.subnav{background:var(--paper);border-bottom:1px solid var(--rule);position:sticky;top:78px;z-index:40}
.subnav ul{list-style:none;display:flex;gap:28px;overflow-x:auto;white-space:nowrap}
.subnav a{display:block;padding:16px 0;font:700 .82rem var(--head);letter-spacing:.1em;text-transform:uppercase;color:var(--ink);text-decoration:none;border-bottom:3px solid transparent}
.subnav a:hover{border-bottom-color:var(--red);color:var(--ink)}
@media (max-width:1060px){.subnav{top:0;position:static}}
.group-title{display:flex;align-items:baseline;justify-content:space-between;gap:20px;border-bottom:2px solid var(--ink);padding-bottom:12px;margin:clamp(40px,6vw,72px) 0 0}
.group-title h2{margin:0}
.group-title span{font:600 .9rem var(--head);color:var(--steel)}
.sector{font:700 .78rem var(--head);letter-spacing:.16em;text-transform:uppercase;color:var(--steel);margin:34px 0 -6px}
.project{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(22px,4vw,56px);padding:clamp(28px,4vw,44px) 0;border-bottom:1px solid var(--rule);scroll-margin-top:140px}
.project.no-img{grid-template-columns:1fr}
.gallery .main{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;cursor:zoom-in;background:var(--paper)}
.gallery .thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:6px}
.gallery .thumbs button{padding:0;border:0;background:none;cursor:zoom-in}
.gallery .thumbs img{aspect-ratio:4/3;object-fit:cover;width:100%;opacity:.9}
.gallery .thumbs button:hover img{opacity:1}
.project h3{font-size:1.6rem;margin-bottom:.6em}
.spec{margin:0 0 1.2em;border-top:1px solid var(--rule)}
.spec div{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:10px 0;border-bottom:1px solid var(--rule)}
.spec dt{font:700 .75rem var(--head);letter-spacing:.14em;text-transform:uppercase;color:var(--steel);padding-top:4px}
.spec dd{margin:0}
.project .body p{color:#2b3947}
@media (max-width:860px){.project{grid-template-columns:1fr}}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(8,15,22,.94);display:none;align-items:center;justify-content:center;z-index:200;padding:20px}
.lb.open{display:flex}
.lb img{max-width:100%;max-height:88vh;width:auto;height:auto}
.lb button{position:absolute;background:none;border:0;color:#fff;font:400 2.4rem/1 var(--head);cursor:pointer;padding:14px}
.lb .x{top:6px;right:10px}.lb .p{left:6px;top:50%}.lb .nx{right:6px;top:50%}

/* callout / cta */
.cta-band{background:var(--navy);color:#fff;padding:clamp(48px,6vw,80px) 0}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .25em}
.cta-band p{color:#c5d3df;margin:0;max-width:52ch}

/* safety grid */
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.photo-grid img{width:100%;aspect-ratio:4/3;object-fit:cover}
.photo-grid .wide{grid-column:span 2;grid-row:span 2;aspect-ratio:auto;height:100%}
@media (max-width:700px){.photo-grid{grid-template-columns:1fr 1fr}.photo-grid .wide{grid-column:span 2;grid-row:auto;aspect-ratio:4/3}}

/* contact */
.contact{display:grid;grid-template-columns:1.25fr 1fr;gap:clamp(30px,6vw,80px)}
@media (max-width:860px){.contact{grid-template-columns:1fr}}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:560px){form .row{grid-template-columns:1fr}}
label{display:block;font:700 .78rem var(--head);letter-spacing:.12em;text-transform:uppercase;margin:0 0 6px;color:var(--ink)}
input,textarea{width:100%;font:inherit;color:var(--ink);border:1px solid #9aa5af;background:#fff;padding:13px 14px;border-radius:0;margin-bottom:18px}
input:focus,textarea:focus{outline:3px solid rgba(13,54,86,.25);border-color:var(--navy)}
textarea{min-height:170px;resize:vertical}
.notice{padding:16px 18px;margin-bottom:24px;border-left:4px solid}
.notice.ok{background:#eaf5ee;border-color:#1a7f37;color:#124d23}
.notice.err{background:#fbecea;border-color:var(--red);color:#7a1a1f}
.notice ul{list-style:none}
.hp{position:absolute;left:-9999px}
.info-block{padding:18px 0;border-bottom:1px solid var(--rule)}
.info-block:first-child{border-top:1px solid var(--rule)}
.info-block h3{font:700 .78rem var(--head);letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:6px}
.info-block p{margin:0}
.info-block a{color:var(--ink);text-decoration:none;font-weight:600}
.info-block a:hover{color:var(--red);text-decoration:underline}

/* footer */
.site-footer{background:var(--ink);color:#aebbc6;font-size:.97rem}
.site-footer .top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.site-footer h4{font:700 .78rem var(--head);letter-spacing:.16em;text-transform:uppercase;color:#fff;margin-bottom:16px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#c9d3dc;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .brand{color:#fff;margin-bottom:16px}
.site-footer .brand small{color:#8a9bab}
.site-footer .brand img{background:#fff;padding:4px;width:46px}
.site-footer address{font-style:normal;line-height:1.6}
.site-footer .bottom{border-top:1px solid var(--rule-dark);padding:20px 0;font-size:.88rem;color:#8a9bab}
.site-footer .bottom .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media (max-width:900px){.site-footer .top{grid-template-columns:1fr 1fr;padding: 25px;}}
@media (max-width:560px){.site-footer .top{grid-template-columns:1fr;padding: 25px;}}

.not-found{text-align:center;padding:clamp(70px,12vw,150px) 0}
.not-found .code{font:700 clamp(5rem,16vw,10rem)/1 var(--head);color:var(--navy);margin:0}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.topbar,.site-header,.cta-band,.site-footer,.subnav{display:none}}