/* ============================================================
   Esteel Construction Ltd — Design System
   Ink Navy / Safety Orange / Concrete · bold industrial sans
   ============================================================ */

:root{
  --ink:#0F1D2E;
  --ink-2:#16283C;
  --orange:#F26B1D;
  --orange-dk:#C9520F;
  --paper:#F7F8FA;
  --concrete:#E8EDF2;
  --slate:#5B6B7C;
  --line:rgba(15,29,46,.12);
  --line-lt:rgba(232,237,242,.16);
  --disp:'Archivo',Arial,sans-serif;
  --sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --wrap:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

h1,h2,h3,h4{font-family:var(--disp);font-weight:800;line-height:1.02;letter-spacing:-.015em;text-transform:uppercase}
h1{font-size:clamp(2.5rem,6vw,4.9rem)}
h2{font-size:clamp(1.9rem,4vw,3.1rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}
p{max-width:64ch}

.wrap{width:min(var(--wrap),92vw);margin-inline:auto}
.eyebrow{font-size:.74rem;font-weight:700;letter-spacing:.26em;text-transform:uppercase;color:var(--orange);display:inline-flex;align-items:center;gap:.7rem}
.eyebrow::before{content:"";width:28px;height:3px;background:var(--orange)}
.lede{font-size:clamp(1.02rem,1.5vw,1.24rem);color:#33475c;max-width:60ch}
.muted{color:var(--slate)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:.9rem;letter-spacing:.04em;text-transform:uppercase;padding:1rem 1.7rem;border:2px solid transparent;cursor:pointer;transition:.3s var(--ease)}
.btn-primary{background:var(--orange);color:#fff;clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%)}
.btn-primary:hover{background:var(--orange-dk);transform:translateY(-2px)}
.btn-ghost{border-color:currentColor;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-ghost.on-dark{color:#fff}
.btn-ghost.on-dark:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn .arw{transition:transform .3s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}

/* header */
.site-head{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:1rem clamp(1rem,4vw,2.6rem);transition:.35s var(--ease)}
.site-head.solid{background:rgba(15,29,46,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line-lt)}
.site-head .brand img{height:40px}
.nav{display:flex;align-items:center;gap:2rem}
.nav a{font-size:.85rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:#fff;opacity:.85;transition:.25s;position:relative}
.nav a:hover,.nav a.active{opacity:1;color:var(--orange)}
.nav a.active::after{content:"";position:absolute;left:0;bottom:-6px;width:100%;height:3px;background:var(--orange)}
.nav .btn{padding:.65rem 1.2rem}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:26px;height:3px;background:#fff;transition:.3s}

/* hero — steel girder motif */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;color:#fff;background:linear-gradient(115deg,#0B1622 0%,#0F1D2E 55%,#14263A 100%);overflow:hidden}
.hero::before{ /* diagonal girder stripes */
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(-55deg,transparent 0 90px,rgba(242,107,29,.07) 90px 108px),
    repeating-linear-gradient(0deg,transparent 0 120px,rgba(232,237,242,.05) 120px 121px),
    repeating-linear-gradient(90deg,transparent 0 120px,rgba(232,237,242,.05) 120px 121px);
}
.hero::after{ /* orange beam */
  content:"";position:absolute;right:-6%;top:-12%;width:46%;height:130%;
  background:linear-gradient(180deg,rgba(242,107,29,.16),rgba(242,107,29,.02));
  transform:skewX(-12deg);border-left:3px solid rgba(242,107,29,.5);
}
.hero-inner{position:relative;z-index:2;width:min(var(--wrap),92vw);margin-inline:auto;padding:9rem 0 4.5rem}
.hero h1{max-width:17ch}
.hero h1 .hl{color:var(--orange)}
.hero .lede{color:#B9C6D2;margin-top:1.5rem}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap;margin-top:2.4rem}
.hero-strip{position:relative;z-index:2;border-top:1px solid var(--line-lt);background:rgba(11,22,34,.5)}
.hero-strip .wrap{display:flex;flex-wrap:wrap;gap:2rem 3rem;padding:1.4rem 0}
.stat{display:flex;flex-direction:column}
.stat b{font-family:var(--disp);font-weight:800;font-size:1.8rem;color:var(--orange);line-height:1}
.stat span{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:#8fa1b3;margin-top:.4rem}

/* sections */
section{padding:clamp(4rem,9vw,7.5rem) 0}
.sec-head{max-width:72ch;margin-bottom:3rem}
.sec-head h2{margin-top:1rem}
.dark{background:var(--ink);color:#fff}
.dark .lede{color:#B9C6D2}

/* cards */
.grid{display:grid;gap:1.3rem}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--concrete);padding:2rem;transition:.35s var(--ease)}
.dark .card{background:var(--ink-2);border-color:var(--line-lt);border-top-color:rgba(232,237,242,.2)}
.card:hover{transform:translateY(-5px);border-top-color:var(--orange);box-shadow:0 24px 50px -30px rgba(15,29,46,.45)}
.card .num{font-family:var(--disp);font-weight:800;font-size:.85rem;color:var(--orange)}
.card h3{margin:.8rem 0 .6rem}
.card p{font-size:.94rem;color:#44586c}
.dark .card p{color:#a7b7c6}
.card .ic{width:42px;height:42px;color:var(--orange);margin-bottom:1rem}

/* sector tiles (capability showcase) */
.sectors{display:grid;grid-template-columns:repeat(6,1fr);gap:1.1rem}
.sector{position:relative;min-height:280px;display:flex;flex-direction:column;justify-content:flex-end;padding:1.6rem;color:#fff;isolation:isolate;border:1px solid var(--line-lt);overflow:hidden}
.sector.big{grid-column:span 3;min-height:360px}
.sector.reg{grid-column:span 2}
.sector::before{content:"";position:absolute;inset:0;z-index:-2;background:var(--bg),linear-gradient(150deg,#1A3049,#0B1622);transition:transform .7s var(--ease)}
.sector::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 35%,rgba(7,14,22,.85))}
.sector:hover::before{transform:scale(1.05)}
.sector .tag{font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--orange);font-weight:700}
.sector h3{margin:.4rem 0 .2rem;color:#fff}
.sector .desc{font-size:.85rem;color:#b9c6d2;max-width:40ch}
.s-industrial{--bg:repeating-linear-gradient(-45deg,transparent 0 26px,rgba(242,107,29,.13) 26px 30px)}
.s-commercial{--bg:repeating-linear-gradient(0deg,transparent 0 34px,rgba(232,237,242,.08) 34px 36px),repeating-linear-gradient(90deg,transparent 0 34px,rgba(232,237,242,.08) 34px 36px)}
.s-residential{--bg:radial-gradient(circle at 30% 25%,rgba(242,107,29,.22),transparent 60%)}
.s-civil{--bg:repeating-linear-gradient(90deg,transparent 0 50px,rgba(242,107,29,.1) 50px 56px)}
.s-steel{--bg:linear-gradient(120deg,rgba(242,107,29,.25),transparent 55%)}
.s-refurb{--bg:radial-gradient(circle at 70% 70%,rgba(232,237,242,.14),transparent 60%)}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,5rem);align-items:center}
.split .visual{aspect-ratio:4/5;border:1px solid var(--line-lt);position:relative;overflow:hidden;
  background:
    repeating-linear-gradient(-55deg,transparent 0 60px,rgba(242,107,29,.12) 60px 72px),
    repeating-linear-gradient(0deg,transparent 0 90px,rgba(232,237,242,.07) 90px 92px),
    linear-gradient(160deg,#1A3049,#0B1622);}
.split .visual .badge{position:absolute;left:1.5rem;bottom:1.5rem;color:#fff;font-family:var(--disp);font-weight:700;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase}
.feature-list{list-style:none;margin-top:2rem;display:grid;gap:1rem}
.feature-list li{display:flex;gap:1rem;align-items:flex-start;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.dark .feature-list li{border-color:var(--line-lt)}
.feature-list .k{font-family:var(--disp);font-weight:800;color:var(--orange);min-width:2.2rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.3rem}
.step{padding-top:1.3rem;border-top:4px solid var(--line-lt)}
.step:first-child{border-top-color:var(--orange)}
.step .n{font-family:var(--disp);font-weight:800;font-size:2.2rem;color:var(--orange);line-height:1}
.step h3{font-size:1.05rem;margin:.6rem 0 .4rem;color:#fff}
.step p{font-size:.88rem;color:#a7b7c6}

/* CTA band */
.cta-band{background:linear-gradient(115deg,var(--orange) 0%,var(--orange-dk) 100%);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(-55deg,transparent 0 70px,rgba(255,255,255,.06) 70px 84px)}
.cta-band .wrap{position:relative}
.cta-band h2{color:#fff;max-width:22ch;margin:0 auto 1.3rem}
.cta-band .btn-ghost{border-color:#fff;color:#fff}
.cta-band .btn-ghost:hover{background:#fff;color:var(--orange-dk)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(2rem,5vw,4.5rem)}
.info-row{display:flex;gap:1rem;padding:1.25rem 0;border-bottom:1px solid var(--line-lt)}
.info-row .ic{width:22px;color:var(--orange);flex-shrink:0;margin-top:3px}
.info-row b{display:block;font-family:var(--disp);font-weight:700;font-size:1rem;letter-spacing:.04em;text-transform:uppercase;color:#fff}
.info-row span{color:#a7b7c6;font-size:.95rem}
form{display:grid;gap:1.1rem}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
label{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:#8fa1b3;font-weight:700;display:block;margin-bottom:.5rem}
input,select,textarea{width:100%;padding:.9rem 1rem;border:1px solid var(--line-lt);background:var(--ink-2);color:#fff;font-family:inherit;font-size:.95rem;transition:.25s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--orange);background:#1c3450}
textarea{resize:vertical;min-height:120px}
.form-note{font-size:.82rem;color:#8fa1b3}

/* page hero */
.page-hero{padding:10.5rem 0 4rem;color:#fff;position:relative;overflow:hidden;background:linear-gradient(115deg,#0B1622,#14263A)}
.page-hero::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(-55deg,transparent 0 90px,rgba(242,107,29,.06) 90px 106px)}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{margin-top:1rem;max-width:18ch}
.crumb{font-size:.78rem;color:#8fa1b3;letter-spacing:.08em;text-transform:uppercase}
.crumb a:hover{color:var(--orange)}

/* values / team */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem;margin-top:1rem}
.value{padding:1.8rem;border:1px solid var(--line);border-top:4px solid var(--orange);background:#fff}
.value .ic{width:36px;color:var(--orange);margin-bottom:1rem}
.value h3{font-size:1.05rem;margin-bottom:.5rem}
.value p{font-size:.92rem;color:#44586c}
.team{display:grid;grid-template-columns:repeat(2,1fr);gap:1.3rem}
.member{display:flex;gap:1.3rem;align-items:center;padding:1.6rem;border:1px solid var(--line-lt);background:var(--ink-2)}
.member .av{width:72px;height:72px;flex-shrink:0;background:var(--orange);display:grid;place-items:center;font-family:var(--disp);font-weight:800;font-size:1.5rem;color:#fff;clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%)}
.member h3{font-size:1.1rem;color:#fff}
.member .role{color:var(--orange);font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.member p{font-size:.88rem;color:#a7b7c6;margin-top:.3rem}

/* service rows */
.svc-row{display:grid;grid-template-columns:.4fr 1.6fr;gap:2rem;padding:2.3rem 0;border-top:1px solid var(--line)}
.svc-row:last-child{border-bottom:1px solid var(--line)}
.svc-row .sn{font-family:var(--disp);font-weight:800;font-size:2rem;color:var(--orange)}
.svc-row h3{margin-bottom:.7rem}
.chips{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem}
.chip{font-size:.76rem;font-weight:600;padding:.35rem .8rem;border:1px solid var(--line);color:var(--slate)}

/* footer */
.site-foot{background:#0B1622;color:#fff;padding:4.5rem 0 2rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:2.4rem;padding-bottom:3rem;border-bottom:1px solid var(--line-lt)}
.site-foot .brand img{height:44px;margin-bottom:1.2rem}
.site-foot p{font-size:.9rem;color:#8fa1b3;max-width:34ch}
.foot-col h4{font-family:var(--disp);font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;color:var(--orange);margin-bottom:1.1rem}
.foot-col a{display:block;font-size:.92rem;color:#b9c6d2;padding:.32rem 0;transition:.2s}
.foot-col a:hover{color:var(--orange)}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding-top:1.6rem;font-size:.8rem;color:#5b6b7c}

/* reveal + a11y + WhatsApp float */
.reveal{opacity:0;transform:translateY(22px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}
.skip{position:absolute;left:-999px;top:0;z-index:200;background:var(--orange);color:#fff;padding:.8rem 1.2rem;font-weight:700}
.skip:focus{left:0}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.wa-float{position:fixed;right:clamp(1rem,3vw,1.6rem);bottom:clamp(1rem,3vw,1.6rem);z-index:90;display:inline-flex;align-items:center;gap:.6rem;background:#25D366;color:#0a2e17;font-weight:700;font-size:.9rem;padding:.85rem 1.2rem;border-radius:100px;box-shadow:0 12px 30px -8px rgba(0,0,0,.45);transition:.3s var(--ease)}
.wa-float:hover{transform:translateY(-3px)}
.wa-float svg{width:22px;height:22px;fill:currentColor}
@media(max-width:560px){.wa-float .lbl{display:none}.wa-float{padding:.9rem}}

/* responsive */
@media(max-width:900px){
  .nav{position:fixed;inset:0 0 0 auto;width:min(78vw,340px);background:var(--ink);flex-direction:column;justify-content:center;gap:1.6rem;transform:translateX(100%);transition:.4s var(--ease);border-left:1px solid var(--line-lt)}
  .nav.open{transform:none}
  .burger{display:flex;z-index:120}
  .cols-3,.cols-2,.steps,.values,.team{grid-template-columns:1fr}
  .split,.contact-grid{grid-template-columns:1fr}
  .sectors{grid-template-columns:1fr}
  .sector.big,.sector.reg{grid-column:span 1}
  .f-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .svc-row{grid-template-columns:1fr;gap:.6rem}
}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}.hero-strip .wrap{gap:1.3rem 2rem}}