/* ===== M&D Ingeniería — estilos ===== */
:root{
  --navy:#14253F; --navy2:#1B2E4A; --navy3:#0F1B30;
  --sand:#C2A878; --sand2:#D6BE96;
  --bone:#F3F0E9; --bone2:#E3DCCB; --bone3:#EAE4D7;
  --ink:#16243A; --muted:#5E667A; --mutedL:#A9B2C1; --white:#fff;
  --head:'Archivo',system-ui,sans-serif;
  --body:'Hanken Grotesk',system-ui,sans-serif;
  --maxw:1240px; --pad:clamp(1.2rem,5vw,4.5rem);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--body);color:var(--ink);background:var(--bone);line-height:1.62;overflow-x:hidden}
h1,h2,h3,h4{font-family:var(--head);font-weight:800;line-height:1.04;letter-spacing:-.02em}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
section{scroll-margin-top:90px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

.kicker{font-family:var(--head);font-weight:700;font-size:.78rem;letter-spacing:.26em;text-transform:uppercase;color:var(--sand);display:inline-flex;align-items:center;gap:.7rem}
.kicker::before{content:"";width:34px;height:2px;background:var(--sand);display:inline-block}
.h2{font-size:clamp(2rem,5vw,3.6rem);text-transform:uppercase;margin:1rem 0 1rem}
.lead-muted{color:var(--muted);font-size:1.1rem;max-width:60ch}
.dark .lead-muted,.darker .lead-muted{color:var(--mutedL)}

.btn{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--head);font-weight:700;font-size:.86rem;letter-spacing:.04em;text-transform:uppercase;padding:1rem 1.7rem;border-radius:2px;cursor:pointer;border:2px solid transparent;transition:.25s}
.btn-sand{background:var(--sand);color:var(--navy)}
.btn-sand:hover{background:var(--sand2);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:rgba(243,240,233,.4);color:var(--bone)}
.btn-ghost:hover{border-color:var(--sand);color:var(--sand)}
.btn-dark{background:var(--navy);color:var(--bone)}
.btn-dark:hover{background:var(--navy2);transform:translateY(-2px)}

/* header */
header{position:fixed;top:0;left:0;right:0;z-index:50;transition:.35s}
.hdr-in{display:flex;align-items:center;justify-content:space-between;max-width:var(--maxw);margin:0 auto;padding:1.1rem var(--pad)}
header.scrolled{background:rgba(15,27,48,.97);backdrop-filter:blur(8px);box-shadow:0 6px 24px rgba(0,0,0,.2)}
.logo-img{height:62px;width:auto;transition:.35s}
header.scrolled .logo-img{height:48px}
nav.main{display:flex;align-items:center;gap:2.1rem}
nav.main a.nl{font-family:var(--head);font-weight:700;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--bone);opacity:.85;transition:.2s;position:relative;padding:.2rem 0}
nav.main a.nl::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;background:var(--sand);transition:.25s}
nav.main a.nl:hover{opacity:1}nav.main a.nl:hover::after{width:100%}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px;z-index:60}
.burger span{width:28px;height:2px;background:var(--bone);transition:.3s}

/* hero (home) */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;color:var(--bone);isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(95deg,rgba(15,27,48,.96) 0%,rgba(20,37,63,.85) 42%,rgba(20,37,63,.4) 78%,rgba(20,37,63,.2) 100%)}
.hero .wrap{width:100%;padding-top:9rem;padding-bottom:6rem}
.hero h1{font-size:clamp(2.6rem,7vw,5.4rem);text-transform:uppercase;max-width:16ch;margin:1.3rem 0 1.4rem;letter-spacing:-.025em}
.hero h1 em{font-style:normal;color:var(--sand)}
.hero p.lead{font-size:clamp(1.05rem,1.7vw,1.28rem);max-width:48ch;color:#E6E9EE;margin-bottom:2.2rem}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap}
.mat-strip{margin-top:3.4rem;display:flex;gap:1.4rem;flex-wrap:wrap;font-family:var(--head);font-weight:700;font-size:.82rem;letter-spacing:.18em;color:var(--sand);text-transform:uppercase}
.mat-strip span{opacity:.5;color:var(--bone)}
.hero-side{position:absolute;top:46%;right:calc(var(--pad) - .5rem);writing-mode:vertical-rl;font-family:var(--head);font-weight:700;font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;color:rgba(243,240,233,.5)}
.scrollcue{position:absolute;bottom:1.4rem;left:50%;transform:translateX(-50%);width:26px;height:42px;border:2px solid rgba(243,240,233,.4);border-radius:14px;display:flex;justify-content:center;padding-top:7px;z-index:1}
.scrollcue i{width:4px;height:8px;background:var(--sand);border-radius:2px;animation:cue 1.6s infinite}
@keyframes cue{0%{opacity:0;transform:translateY(-4px)}40%{opacity:1}100%{opacity:0;transform:translateY(12px)}}

/* stats bar */
.statsbar{background:var(--navy);color:var(--bone)}
.statsbar .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-top:0;padding-bottom:0}
.sb{padding:2.4rem 1.6rem;border-right:1px solid rgba(243,240,233,.12)}
.sb:first-child{padding-left:0}.sb:last-child{border-right:0}
.sb .n{font-family:var(--head);font-weight:800;font-size:2.6rem;color:var(--sand);line-height:1}
.sb .l{font-size:.92rem;color:var(--mutedL);margin-top:.5rem}

/* sections */
.sec{padding:clamp(4.5rem,9vw,8rem) 0}
.sec-head{max-width:64ch;margin-bottom:3.2rem}
.sec-head .h2{color:inherit}
.dark{background:var(--navy);color:var(--bone)}
.darker{background:var(--navy3);color:var(--bone)}
.dark .h2,.darker .h2{color:var(--bone)}

/* services as bold rows */
.svc-list{border-top:1px solid var(--bone2)}
.svc-row{display:grid;grid-template-columns:78px 1.05fr 1.45fr 34px;gap:1.6rem;align-items:center;padding:1.9rem .6rem;border-bottom:1px solid var(--bone2);transition:.3s;cursor:default}
.svc-row:hover{background:var(--white);padding-left:1.4rem}
.svc-row .ix{font-family:var(--head);font-weight:800;font-size:1.7rem;color:var(--sand)}
.svc-row h3{font-size:1.4rem;text-transform:uppercase;letter-spacing:-.01em;color:var(--ink)}
.svc-row p{color:var(--muted);font-size:1rem}
.svc-row .ar{justify-self:end;color:var(--sand);opacity:0;transform:translateX(-8px);transition:.3s}
.svc-row:hover .ar{opacity:1;transform:none}
.svc-row .ar svg{width:24px;height:24px;stroke:var(--sand);fill:none;stroke-width:2}

/* materialidad */
.grid-mat{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.tile{position:relative;border-radius:3px;overflow:hidden;height:420px}
.tile img{width:100%;height:100%;object-fit:cover;transition:.6s}
.tile::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(15,27,48,.93) 6%,rgba(15,27,48,.2) 58%,rgba(15,27,48,.05) 100%)}
.tile:hover img{transform:scale(1.07)}
.tile .cap{position:absolute;left:0;right:0;bottom:0;padding:1.5rem;z-index:2}
.tile .cap h3{font-size:1.5rem;text-transform:uppercase;color:var(--bone)}
.tile .cap p{font-size:.88rem;color:var(--mutedL);margin-top:.25rem}
.tile .cap::before{content:"";display:block;width:36px;height:3px;background:var(--sand);margin-bottom:.8rem}

/* proceso */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:1.2rem;position:relative}
.steps::before{content:"";position:absolute;top:32px;left:7%;right:7%;height:2px;background:linear-gradient(90deg,var(--sand),rgba(194,168,120,.2));z-index:0}
.step{position:relative;z-index:1}
.step .sn{width:64px;height:64px;border-radius:50%;background:var(--bone);border:2px solid var(--sand);color:var(--navy);font-family:var(--head);font-weight:800;font-size:1.25rem;display:flex;align-items:center;justify-content:center;margin-bottom:1.1rem}
.dark .step .sn{background:var(--navy)}
.step h3{font-size:1.08rem;text-transform:uppercase;margin-bottom:.45rem;color:inherit}
.step p{font-size:.92rem;color:var(--muted)}
.dark .step p{color:var(--mutedL)}

/* proyectos grid */
.grid-proj{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.proj{position:relative;border-radius:3px;overflow:hidden;height:320px;display:block}
.proj img{width:100%;height:100%;object-fit:cover;transition:.6s}
.proj::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(15,27,48,.92),rgba(15,27,48,.1) 62%,transparent);transition:.35s}
.proj:hover img{transform:scale(1.08)}
.proj .pc{position:absolute;left:0;right:0;bottom:0;padding:1.5rem;z-index:2}
.proj .pc .pt{font-family:var(--head);font-weight:800;font-size:1.2rem;text-transform:uppercase;color:var(--bone);border-left:3px solid var(--sand);padding-left:.8rem;line-height:1.1}
.proj .pc .ps{font-size:.86rem;color:var(--mutedL);margin-top:.5rem;padding-left:1.05rem}
.center{text-align:center;margin-top:2.6rem}

/* cta band */
.cta{background:var(--navy);color:var(--bone);text-align:center}
.cta .wrap{padding-top:clamp(3.5rem,7vw,5.5rem);padding-bottom:clamp(3.5rem,7vw,5.5rem)}
.cta h2{font-size:clamp(1.9rem,4.5vw,3.2rem);text-transform:uppercase;max-width:20ch;margin:.8rem auto 1.8rem}

/* about (home + page) */
.about{display:grid;grid-template-columns:.9fr 1.1fr;gap:3.8rem;align-items:center}
.about-img{position:relative}
.about-img img{border-radius:3px;width:100%;height:520px;object-fit:cover;position:relative;z-index:1}
.about-img::before{content:"";position:absolute;inset:-20px -20px 20px 20px;border:2px solid var(--sand);border-radius:3px;z-index:0}
.about .h2{margin-top:.8rem}
.bio{color:var(--muted);font-size:1.08rem;margin-bottom:1.8rem}
.mv{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem;margin-bottom:1.8rem}
.mv h4{font-family:var(--head);color:var(--sand);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:.5rem}
.mv p{font-size:.98rem;color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:2rem}
.chip{font-family:var(--head);font-weight:700;font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;padding:.55rem 1.05rem;border:1.5px solid var(--bone2);border-radius:2px;color:var(--navy);background:var(--white)}
.statsrow{display:flex;gap:2.6rem;flex-wrap:wrap;border-top:1px solid var(--bone2);padding-top:1.7rem}
.statsrow .n{font-family:var(--head);font-weight:800;font-size:2rem;color:var(--navy)}
.statsrow .l{font-size:.85rem;color:var(--muted)}

/* contacto */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:3.8rem}
.contact .h2{max-width:14ch}
.cinfo{display:flex;flex-direction:column;gap:1.2rem;margin-top:.6rem}
.crow{display:flex;align-items:center;gap:1rem}
.crow .ci{width:46px;height:46px;border-radius:3px;background:var(--navy2);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.crow .ci svg{width:21px;height:21px;stroke:var(--sand);fill:none;stroke-width:1.7}
.crow a,.crow span{color:var(--bone);font-size:1.02rem}
.crow small{display:block;color:var(--mutedL);font-size:.74rem;font-family:var(--head);letter-spacing:.12em;text-transform:uppercase}
.social{display:flex;gap:.8rem;margin-top:1.8rem}
.social a{width:46px;height:46px;border-radius:50%;border:1.5px solid rgba(243,240,233,.3);display:flex;align-items:center;justify-content:center;transition:.25s}
.social a svg{width:20px;height:20px;stroke:var(--bone);fill:none;stroke-width:1.7}
.social a:hover{border-color:var(--sand);background:var(--sand)}.social a:hover svg{stroke:var(--navy)}
.form{background:var(--navy2);border-radius:4px;padding:2.2rem}
.form label{font-family:var(--head);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mutedL);display:block;margin-bottom:.4rem}
.form .fg{margin-bottom:1.1rem}
.form input,.form textarea{width:100%;background:rgba(243,240,233,.06);border:1px solid rgba(243,240,233,.18);border-radius:3px;padding:.85rem 1rem;color:var(--bone);font-family:var(--body);font-size:.98rem;transition:.2s}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--sand);background:rgba(243,240,233,.1)}
.form textarea{resize:vertical;min-height:120px}
.form .btn{width:100%;justify-content:center;margin-top:.3rem}

/* page hero (sub pages) */
.pagehero{position:relative;min-height:56vh;display:flex;align-items:flex-end;color:var(--bone);isolation:isolate}
.pagehero-bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center}
.pagehero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(to top,rgba(15,27,48,.95),rgba(20,37,63,.62))}
.pagehero .wrap{width:100%;padding-bottom:3.4rem;padding-top:8rem}
.pagehero h1{font-size:clamp(2.6rem,6vw,4.6rem);text-transform:uppercase;margin:.9rem 0 .6rem}
.crumb{font-family:var(--head);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--mutedL)}
.crumb a:hover{color:var(--sand)}

/* project detail blocks */
.pblock{display:grid;grid-template-columns:1fr 1fr;gap:3.2rem;align-items:center;padding:clamp(3rem,6vw,5rem) 0;border-bottom:1px solid var(--bone2)}
.pblock:nth-child(even) .pb-media{order:2}
.pb-media{display:grid;gap:.8rem}
.pb-media.two{grid-template-columns:1fr 1fr}
.pb-media img{width:100%;height:100%;max-height:420px;object-fit:cover;border-radius:3px}
.pb-media.two img{height:300px}
.pb-tag{display:inline-block;font-family:var(--head);font-weight:700;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--sand);border:1.5px solid var(--sand);border-radius:2px;padding:.32rem .8rem;margin-bottom:1rem}
.pblock h2{font-size:clamp(1.6rem,3.4vw,2.4rem);text-transform:uppercase;margin-bottom:.5rem}
.pb-meta{font-family:var(--head);font-weight:600;font-size:.85rem;color:var(--muted);letter-spacing:.04em;margin-bottom:1.1rem}
.pblock p{color:var(--muted);margin-bottom:1rem}
.pb-list{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.pb-list li{display:flex;gap:.6rem;color:var(--ink);font-size:.96rem}
.pb-list li::before{content:"";flex-shrink:0;width:8px;height:8px;margin-top:.5rem;background:var(--sand);border-radius:1px}

/* timeline / cv */
.split{display:grid;grid-template-columns:1fr 1fr;gap:3.6rem;align-items:start}
.tl{border-top:1px solid var(--bone2)}
.dark .tl{border-color:rgba(243,240,233,.14)}
.tl-item{display:grid;grid-template-columns:200px 1fr;gap:2rem;padding:1.7rem 0;border-bottom:1px solid var(--bone2)}
.dark .tl-item{border-color:rgba(243,240,233,.14)}
.tl-when{font-family:var(--head);font-weight:800;color:var(--sand);font-size:1.02rem}
.tl-when span{display:block;font-weight:600;font-size:.84rem;color:var(--muted);letter-spacing:.04em;margin-top:.25rem;text-transform:uppercase}
.dark .tl-when span{color:var(--mutedL)}
.tl-what h3{font-size:1.16rem;text-transform:uppercase;margin-bottom:.5rem}
.tl-what p,.tl-what li{color:var(--muted);font-size:.97rem}
.dark .tl-what p,.dark .tl-what li{color:var(--mutedL)}
.tl-what ul{list-style:none;margin-top:.4rem;display:flex;flex-direction:column;gap:.35rem}
.tl-what li{display:flex;gap:.55rem}
.tl-what li::before{content:"";flex-shrink:0;width:7px;height:7px;margin-top:.5rem;background:var(--sand);border-radius:1px}
.cols2{columns:2;column-gap:2.4rem}
.tagcloud{display:flex;flex-wrap:wrap;gap:.6rem}
.tag{font-family:var(--head);font-weight:600;font-size:.82rem;padding:.5rem 1rem;border:1.5px solid var(--bone2);border-radius:2px;background:var(--white);color:var(--navy)}
.dark .tag{background:var(--navy2);border-color:rgba(243,240,233,.15);color:var(--bone)}
.feat{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.feat .fi{background:var(--white);border:1px solid var(--bone2);border-radius:4px;padding:1.6rem}
.feat .fi h4{font-size:1.05rem;text-transform:uppercase;margin-bottom:.4rem}
.feat .fi p{color:var(--muted);font-size:.95rem}

/* footer */
footer{background:var(--navy3);color:var(--bone);padding:3.8rem 0 2rem}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:2rem;flex-wrap:wrap;padding-bottom:2.4rem;border-bottom:1px solid rgba(243,240,233,.12)}
.foot .logo-img{height:58px}
.foot nav{display:flex;gap:1.6rem;flex-wrap:wrap}
.foot nav a{font-family:var(--head);font-weight:700;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--mutedL);transition:.2s}
.foot nav a:hover{color:var(--sand)}
.fbot{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.7rem;font-size:.82rem;color:var(--mutedL)}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}

/* responsive */
@media(max-width:1000px){
  .grid-svc{grid-template-columns:repeat(2,1fr)}
  .grid-mat{grid-template-columns:repeat(2,1fr)}
  .grid-proj{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:1.8rem}.steps::before{display:none}
  .about,.contact,.split{grid-template-columns:1fr;gap:2.6rem}
  .about-img::before{inset:-12px -12px 12px 12px}
  .pblock{grid-template-columns:1fr;gap:1.8rem}
  .pblock:nth-child(even) .pb-media{order:0}
  .statsbar .wrap{grid-template-columns:repeat(2,1fr)}
  .sb{border-bottom:1px solid rgba(243,240,233,.12)}
  .sb:nth-child(2){border-right:0}
}
@media(max-width:640px){
  nav.main{position:fixed;inset:0 0 0 auto;width:min(80vw,330px);background:var(--navy);flex-direction:column;justify-content:center;gap:1.7rem;padding:2rem;transform:translateX(100%);transition:.35s;box-shadow:-10px 0 40px rgba(0,0,0,.4)}
  nav.main.open{transform:none}
  nav.main a.nl{font-size:1.05rem}
  .burger{display:flex}
  .burger.x span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.x span:nth-child(2){opacity:0}
  .burger.x span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .grid-svc,.grid-mat,.grid-proj,.steps,.mv,.feat,.cols2{grid-template-columns:1fr;columns:1}
  .statsbar .wrap{grid-template-columns:1fr 1fr}
  .svc-row{grid-template-columns:48px 1fr;gap:.6rem 1rem;padding:1.4rem .2rem}
  .svc-row p{grid-column:1/-1}.svc-row .ar{display:none}
  .tl-item{grid-template-columns:1fr;gap:.6rem}
  .logo-img{height:48px}
  .nav-cta-d{display:none}
  .hero-side{display:none}
}