/* ============================================================
   BIOTEKTON — Hoja de estilos principal
   Paleta y tipografía derivadas del logotipo
   ============================================================ */

:root{
  --navy-900:#0A1F33;
  --navy-800:#0F2D47;
  --navy-700:#163A5C;
  --navy-600:#1F4C73;
  --green-700:#2E7F62;
  --green-600:#3B9B78;
  --green-500:#57B48E;
  --green-400:#7ED3A0;
  --grey-100:#F3F5F7;
  --grey-200:#E4E8EC;
  --grey-300:#C9D0D7;
  --grey-500:#6B7A88;
  --white:#FFFFFF;
  --text:#152738;
  --text-muted:#556677;

  --font-head:"Montserrat",Arial,Helvetica,sans-serif;
  --font-body:"IBM Plex Sans",Arial,Helvetica,sans-serif;

  --container:1180px;
  --radius:4px;
  --shadow-sm:0 1px 2px rgba(10,31,51,.06),0 2px 8px rgba(10,31,51,.06);
  --shadow-md:0 8px 24px rgba(10,31,51,.10);
  --transition:.25s ease;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  color:var(--text);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.15;
  color:var(--navy-900);
  letter-spacing:-.01em;
}
h1{font-size:clamp(2.1rem,4.2vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.7rem,3vw,2.4rem)}
h3{font-size:1.25rem}
h4{font-size:1.05rem}
p{color:var(--text-muted)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0}
.section--grey{background:var(--grey-100)}
.section--navy{background:var(--navy-900);color:var(--white)}
.section--navy h2,.section--navy h3{color:var(--white)}
.section--navy p{color:rgba(255,255,255,.72)}

/* Etiqueta de sección — usada solo donde aporta jerarquía */
.tag{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-head);
  font-size:.72rem;
  font-weight:600;
  color:var(--green-700);
  margin-bottom:18px;
}
.tag::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--green-500);
}
.section--navy .tag{color:var(--green-400)}

.section-head{max-width:720px;margin-bottom:56px}
.section-head p{font-size:1.08rem;margin-top:16px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head--center .tag{justify-content:center}

/* ------------------------------------------------------------
   Botones
   ------------------------------------------------------------ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-head);
  font-size:.88rem;
  font-weight:600;
  padding:15px 28px;
  border-radius:var(--radius);
  transition:var(--transition);
  border:1.5px solid transparent;
  white-space:nowrap;
}
.btn i{font-size:.9em}
.btn--primary{background:var(--green-600);color:var(--white)}
.btn--primary:hover{background:var(--green-700);transform:translateY(-1px)}
.btn--navy{background:var(--navy-800);color:var(--white)}
.btn--navy:hover{background:var(--navy-700)}
.btn--outline{border-color:var(--navy-800);color:var(--navy-800)}
.btn--outline:hover{background:var(--navy-800);color:var(--white)}
.btn--outline-light{border-color:rgba(255,255,255,.55);color:var(--white)}
.btn--outline-light:hover{background:var(--white);color:var(--navy-900)}
.btn--link{
  padding:0;
  color:var(--green-700);
  border:0;
  font-size:.85rem;
}
.btn--link:hover{gap:14px}

/* ------------------------------------------------------------
   Barra superior
   ------------------------------------------------------------ */
.topbar{
  background:var(--navy-900);
  color:rgba(255,255,255,.8);
  font-size:.8rem;
}
.topbar .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  height:38px;
}
.topbar ul{display:flex;gap:28px}
.topbar li{display:flex;align-items:center;gap:8px}
.topbar i{color:var(--green-400);font-size:.85rem}
.topbar a:hover{color:var(--white)}

/* ------------------------------------------------------------
   Header
   ------------------------------------------------------------ */
.header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--white);
  border-bottom:1px solid var(--grey-200);
  transition:box-shadow var(--transition);
}
.header.is-scrolled{box-shadow:var(--shadow-sm)}
.header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:82px;
}
.logo img{height:44px;width:auto}

.nav{display:flex;align-items:center;gap:36px}
.nav > li{position:relative}
.nav > li > a{
  font-family:var(--font-head);
  font-size:.82rem;
  font-weight:600;
  color:var(--navy-800);
  display:flex;
  align-items:center;
  gap:6px;
  padding:10px 0;
  position:relative;
}
.nav > li > a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--green-500);
  transition:width var(--transition);
}
.nav > li > a:hover::after,.nav > li > a.is-active::after{width:100%}
.nav > li > a i{font-size:.7rem;color:var(--grey-500)}

.dropdown{
  position:absolute;
  top:calc(100% + 8px);
  left:-16px;
  min-width:280px;
  background:var(--white);
  border:1px solid var(--grey-200);
  border-top:3px solid var(--green-500);
  box-shadow:var(--shadow-md);
  padding:10px 0;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:var(--transition);
}
.nav > li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{
  display:block;
  padding:11px 20px;
  font-size:.88rem;
  color:var(--text);
}
.dropdown a:hover{background:var(--grey-100);color:var(--navy-800)}

.header .btn{padding:12px 22px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  font-size:1.35rem;
  color:var(--navy-800);
}

/* ------------------------------------------------------------
   Hero
   ------------------------------------------------------------ */
.hero{
  position:relative;
  display:flex;
  flex-direction:column;
  color:var(--white);
  overflow:hidden;
  isolation:isolate;
  background:var(--navy-900);
}
.hero__bg{
  position:absolute;inset:0;z-index:-2;
  background:url("https://img.clemix.cl/uploads/biotekton-portada-autor-milad-fakurian.webp") center/cover no-repeat;
}
.hero__overlay{
  position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,rgba(10,31,51,.96) 0%,rgba(15,45,71,.88) 45%,rgba(15,45,71,.45) 100%);
}
.hero__main{
  flex:1;
  display:flex;
  align-items:center;
  min-height:560px;
}
.hero__main .container{padding-top:96px;padding-bottom:96px}
.hero__content{max-width:680px}
.hero__kicker{
  display:inline-block;
  font-family:var(--font-head);
  font-size:.75rem;
  font-weight:600;
  color:var(--green-400);
  border-left:3px solid var(--green-400);
  padding-left:14px;
  margin-bottom:26px;
}
.hero h1{color:var(--white);margin-bottom:22px}
.hero h1 span{color:var(--green-400)}
.hero p{
  font-size:1.12rem;
  color:rgba(255,255,255,.8);
  max-width:560px;
  margin-bottom:38px;
}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap}

.hero__strip{
  position:relative;
  background:rgba(10,31,51,.78);
  backdrop-filter:blur(6px);
  border-top:1px solid rgba(255,255,255,.12);
}
.hero__strip ul{
  display:grid;
  grid-template-columns:repeat(3,1fr);
}
.hero__strip li{
  padding:22px 28px;
  display:flex;
  gap:16px;
  align-items:center;
  border-right:1px solid rgba(255,255,255,.1);
}
.hero__strip li:first-child{padding-left:0}
.hero__strip li:last-child{border-right:0}
.hero__strip i{
  font-size:1.35rem;
  color:var(--green-400);
  flex-shrink:0;
}
.hero__strip strong{
  display:block;
  font-family:var(--font-head);
  font-size:.82rem;
  font-weight:700;
  color:var(--white);
}
.hero__strip small{font-size:.78rem;color:rgba(255,255,255,.65)}

/* ------------------------------------------------------------
   Introducción / Nosotros
   ------------------------------------------------------------ */
.intro{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:80px;
  align-items:center;
}
.intro__media{position:relative}
.intro__media img{
  width:100%;
  height:520px;
  object-fit:cover;
  border-radius:var(--radius);
}
.intro__badge{
  position:absolute;
  right:-24px;
  bottom:40px;
  background:var(--navy-900);
  color:var(--white);
  padding:28px 30px;
  max-width:260px;
  border-left:4px solid var(--green-500);
}
.intro__badge strong{
  display:block;
  font-family:var(--font-head);
  font-size:1.1rem;
  line-height:1.3;
  margin-bottom:8px;
}
.intro__badge span{font-size:.85rem;color:rgba(255,255,255,.7)}
.intro__text h2{margin-bottom:22px}
.intro__text p{margin-bottom:18px;font-size:1.02rem}
.intro__list{margin:28px 0 36px;display:grid;gap:14px}
.intro__list li{
  display:flex;
  gap:14px;
  align-items:flex-start;
  font-size:.98rem;
  color:var(--text);
}
.intro__list i{
  color:var(--green-600);
  margin-top:5px;
  font-size:.95rem;
}

/* ------------------------------------------------------------
   Servicios
   ------------------------------------------------------------ */
.services{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border:1px solid var(--grey-200);
  background:var(--white);
}
.service{
  padding:0;
  border-right:1px solid var(--grey-200);
  display:flex;
  flex-direction:column;
  transition:var(--transition);
  position:relative;
}
.service:last-child{border-right:0}
.service:hover{box-shadow:var(--shadow-md);z-index:2}
.service__img{
  height:200px;
  overflow:hidden;
}
.service__img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.service:hover .service__img img{transform:scale(1.05)}
.service__body{padding:30px 28px 34px;flex:1;display:flex;flex-direction:column}
.service__icon{
  width:52px;height:52px;
  border-radius:var(--radius);
  background:var(--navy-900);
  color:var(--green-400);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.3rem;
  margin:-56px 0 22px;
  position:relative;
  border:3px solid var(--white);
}
.service h3{margin-bottom:12px;font-size:1.15rem}
.service p{font-size:.93rem;margin-bottom:18px}
.service__items{
  margin-bottom:26px;
  display:grid;
  gap:8px;
  flex:1;
}
.service__items li{
  font-size:.86rem;
  color:var(--text);
  padding-left:18px;
  position:relative;
}
.service__items li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:8px;height:2px;
  background:var(--green-500);
}
.service .btn--link{margin-top:auto}

/* ------------------------------------------------------------
   Modelo de alianza (elemento distintivo)
   ------------------------------------------------------------ */
.alliance{position:relative}
.alliance__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  position:relative;
  margin-bottom:52px;
}
.alliance__grid::before{
  content:"";
  position:absolute;
  top:34px;left:12%;right:12%;
  height:2px;
  background:linear-gradient(90deg,var(--navy-600),var(--green-500));
  z-index:0;
}
.pillar{
  position:relative;
  z-index:1;
  background:var(--navy-800);
  border:1px solid rgba(255,255,255,.08);
  padding:0 26px 30px;
  border-radius:var(--radius);
  text-align:center;
}
.pillar__node{
  width:68px;height:68px;
  margin:0 auto 20px;
  background:var(--navy-900);
  border:2px solid var(--green-500);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.5rem;
  color:var(--green-400);
  position:relative;
  top:0;
}
.pillar:nth-child(1) .pillar__node{background:var(--navy-900)}
.pillar:nth-child(2) .pillar__node{background:var(--navy-700)}
.pillar:nth-child(3) .pillar__node{background:var(--green-700);color:var(--white)}
.pillar:nth-child(4) .pillar__node{background:var(--green-500);color:var(--navy-900)}
.pillar h4{color:var(--white);margin-bottom:8px;font-size:.98rem}
.pillar p{font-size:.85rem}

.alliance__hub{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:32px;
  align-items:center;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  border-left:4px solid var(--green-500);
  padding:34px 40px;
}
.alliance__hub-icon{
  width:84px;height:84px;
  border-radius:50%;
  background:var(--green-500);
  color:var(--navy-900);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:2rem;
}
.alliance__hub h3{margin-bottom:8px}
.alliance__hub p{font-size:1rem;max-width:720px}

.alliance__benefits{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:rgba(255,255,255,.1);
  margin-top:52px;
}
.alliance__benefits li{
  background:var(--navy-900);
  padding:28px 30px;
  display:flex;
  gap:16px;
  align-items:flex-start;
}
.alliance__benefits i{color:var(--green-400);font-size:1.25rem;margin-top:3px}
.alliance__benefits strong{
  display:block;
  font-family:var(--font-head);
  font-size:.9rem;
  color:var(--white);
  margin-bottom:6px;
}
.alliance__benefits span{font-size:.86rem;color:rgba(255,255,255,.65)}

/* ------------------------------------------------------------
   Proceso de trabajo
   ------------------------------------------------------------ */
.process{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.step{
  padding-top:24px;
  border-top:2px solid var(--grey-200);
  position:relative;
}
.step::before{
  content:"";
  position:absolute;
  top:-2px;left:0;
  width:56px;height:2px;
  background:var(--green-500);
}
.step__num{
  font-family:var(--font-head);
  font-size:2.4rem;
  font-weight:800;
  color:var(--grey-300);
  line-height:1;
  margin-bottom:18px;
}
.step h3{font-size:1.08rem;margin-bottom:10px}
.step p{font-size:.92rem}

/* ------------------------------------------------------------
   Sectores
   ------------------------------------------------------------ */
.sectors{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:80px;
  align-items:center;
}
.sectors__list{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.sectors__list li{
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px 20px;
  background:var(--white);
  border:1px solid var(--grey-200);
  font-family:var(--font-head);
  font-size:.85rem;
  font-weight:600;
  color:var(--navy-800);
}
.sectors__list i{color:var(--green-600);font-size:1.1rem;width:22px;text-align:center}
.sectors__media{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.sectors__media img{
  width:100%;height:260px;object-fit:cover;border-radius:var(--radius);
}
.sectors__media img:first-child{grid-column:1/-1;height:300px}

/* ------------------------------------------------------------
   Compromisos (HSE / normativa)
   ------------------------------------------------------------ */
.commitments{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.commitment{
  background:var(--white);
  border:1px solid var(--grey-200);
  border-top:3px solid var(--navy-800);
  padding:38px 32px;
}
.commitment:nth-child(2){border-top-color:var(--green-600)}
.commitment:nth-child(3){border-top-color:var(--green-400)}
.commitment i{
  font-size:1.8rem;
  color:var(--navy-800);
  margin-bottom:22px;
  display:block;
}
.commitment h3{font-size:1.1rem;margin-bottom:12px}
.commitment p{font-size:.93rem}

/* ------------------------------------------------------------
   CTA
   ------------------------------------------------------------ */
.cta{
  position:relative;
  background:url("../img/metal.jpg") center/cover no-repeat;
  color:var(--white);
  isolation:isolate;
}
.cta::before{
  content:"";
  position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(46,127,98,.95),rgba(15,45,71,.92));
}
.cta .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:40px;
  padding-top:72px;
  padding-bottom:72px;
}
.cta h2{color:var(--white);max-width:640px;margin-bottom:10px}
.cta p{color:rgba(255,255,255,.82);font-size:1.05rem}
.cta__actions{display:flex;gap:14px;flex-shrink:0}

/* ------------------------------------------------------------
   Contacto
   ------------------------------------------------------------ */
.contact{
  display:grid;
  grid-template-columns:1fr 1.25fr;
  gap:72px;
}
.contact__info{display:grid;gap:26px;margin-top:36px}
.contact__info li{display:flex;gap:18px;align-items:flex-start}
.contact__info i{
  width:46px;height:46px;
  flex-shrink:0;
  background:var(--grey-100);
  color:var(--navy-800);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.05rem;
  border-radius:var(--radius);
}
.contact__info strong{
  display:block;
  font-family:var(--font-head);
  font-size:.82rem;
  font-weight:600;
  color:var(--navy-800);
  margin-bottom:3px;
}
.contact__info span,.contact__info a{font-size:.95rem;color:var(--text-muted)}
.contact__info a:hover{color:var(--green-700)}

.form{
  background:var(--white);
  border:1px solid var(--grey-200);
  padding:44px;
  box-shadow:var(--shadow-sm);
}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form__group{margin-bottom:18px}
.form label{
  display:block;
  font-family:var(--font-head);
  font-size:.75rem;
  font-weight:600;
  color:var(--navy-800);
  margin-bottom:8px;
}
.form input,.form select,.form textarea{
  width:100%;
  font-family:var(--font-body);
  font-size:.95rem;
  color:var(--text);
  padding:13px 16px;
  border:1px solid var(--grey-300);
  border-radius:var(--radius);
  background:var(--white);
  transition:border-color var(--transition),box-shadow var(--transition);
}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;
  border-color:var(--green-600);
  box-shadow:0 0 0 3px rgba(59,155,120,.15);
}
.form textarea{min-height:130px;resize:vertical}
.form .btn{width:100%;justify-content:center;margin-top:8px}
.form__note{font-size:.8rem;margin-top:14px;text-align:center}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.footer{
  background:var(--navy-900);
  color:rgba(255,255,255,.7);
  font-size:.9rem;
}
.footer__top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:48px;
  padding:72px 0 56px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer__brand img{height:46px;width:auto;margin-bottom:22px}
.footer__brand p{color:rgba(255,255,255,.65);max-width:340px;font-size:.9rem}
.footer h4{
  color:var(--white);
  font-size:.82rem;
  font-weight:700;
  margin-bottom:22px;
}
.footer ul{display:grid;gap:12px}
.footer a:hover{color:var(--green-400)}
.footer__contact li{display:flex;gap:12px;align-items:flex-start}
.footer__contact i{color:var(--green-400);margin-top:4px;font-size:.9rem}
.footer__bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:24px 0;
  font-size:.8rem;
  color:rgba(255,255,255,.5);
  flex-wrap:wrap;
  gap:12px;
}
.footer__bottom a{color:rgba(255,255,255,.7)}

/* ------------------------------------------------------------
   WhatsApp flotante
   ------------------------------------------------------------ */
.whatsapp{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:200;
  width:60px;height:60px;
  border-radius:50%;
  background:#25D366;
  color:var(--white);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:2rem;
  box-shadow:0 6px 20px rgba(37,211,102,.4);
  transition:var(--transition);
}
.whatsapp:hover{transform:scale(1.06);box-shadow:0 8px 26px rgba(37,211,102,.55)}
.whatsapp__label{
  position:absolute;
  right:72px;
  background:var(--navy-900);
  color:var(--white);
  font-family:var(--font-head);
  font-size:.75rem;
  font-weight:600;
  padding:9px 14px;
  border-radius:var(--radius);
  white-space:nowrap;
  opacity:0;
  transform:translateX(8px);
  transition:var(--transition);
  pointer-events:none;
}
.whatsapp:hover .whatsapp__label{opacity:1;transform:translateX(0)}

/* ------------------------------------------------------------
   Animación de aparición
   ------------------------------------------------------------ */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */
@media (max-width:1080px){
  .services{grid-template-columns:repeat(2,1fr)}
  .service:nth-child(2){border-right:0}
  .service:nth-child(1),.service:nth-child(2){border-bottom:1px solid var(--grey-200)}
  .alliance__grid{grid-template-columns:repeat(2,1fr)}
  .alliance__grid::before{display:none}
  .process{grid-template-columns:repeat(2,1fr);gap:40px}
  .footer__top{grid-template-columns:1fr 1fr}
}

@media (max-width:900px){
  .section{padding:72px 0}
  .topbar{display:none}
  .header .container{height:72px}
  .logo img{height:38px}
  .header .btn{display:none}
  .nav-toggle{display:flex}
  .nav{
    position:fixed;
    top:72px;left:0;right:0;
    background:var(--white);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 24px 24px;
    border-bottom:1px solid var(--grey-200);
    box-shadow:var(--shadow-md);
    display:none;
  }
  .nav.is-open{display:flex}
  .nav > li > a{padding:14px 0;border-bottom:1px solid var(--grey-200)}
  .nav > li > a::after{display:none}
  .dropdown{
    position:static;
    opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-left:2px solid var(--green-500);
    margin:6px 0 10px 8px;padding:0;
    min-width:0;
    display:none;
  }
  .nav > li.is-open .dropdown{display:block}
  .hero__main{min-height:auto}
  .hero__main .container{padding-top:72px;padding-bottom:72px}
  .hero__strip ul{grid-template-columns:1fr}
  .hero__strip li{border-right:0;border-bottom:1px solid rgba(255,255,255,.1);padding:14px 0}
  .hero__strip li:last-child{border-bottom:0}
  .intro,.sectors,.contact{grid-template-columns:1fr;gap:48px}
  .intro__media img{height:380px}
  .intro__badge{right:16px;bottom:16px}
  .alliance__hub{grid-template-columns:1fr;gap:20px;padding:28px}
  .alliance__benefits{grid-template-columns:1fr}
  .commitments{grid-template-columns:1fr}
  .cta .container{flex-direction:column;align-items:flex-start}
  .form{padding:30px 24px}
  .form__row{grid-template-columns:1fr}
}

@media (max-width:600px){
  .services{grid-template-columns:1fr}
  .service{border-right:0;border-bottom:1px solid var(--grey-200)}
  .service:last-child{border-bottom:0}
  .alliance__grid,.process,.sectors__list,.sectors__media{grid-template-columns:1fr}
  .sectors__media img{height:220px}
  .footer__top{grid-template-columns:1fr;gap:36px}
  .hero__actions .btn{width:100%;justify-content:center}
  .cta__actions{flex-direction:column;width:100%}
  .cta__actions .btn{justify-content:center}
  .whatsapp{width:54px;height:54px;font-size:1.75rem;right:16px;bottom:16px}
}

/* ============================================================
   Páginas interiores
   ============================================================ */
.page-head{
  background:linear-gradient(100deg,var(--navy-900) 0%,var(--navy-800) 60%,var(--navy-700) 100%);
  color:var(--white);
  padding:64px 0 56px;
  border-bottom:3px solid var(--green-500);
}
.breadcrumb{
  font-size:.8rem;
  color:rgba(255,255,255,.55);
  margin-bottom:18px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.breadcrumb a:hover{color:var(--green-400)}
.breadcrumb span{color:var(--green-400)}
.page-head h1{color:var(--white);font-size:clamp(1.9rem,3.4vw,2.8rem)}
.page-head p{
  color:rgba(255,255,255,.75);
  max-width:680px;
  margin-top:14px;
  font-size:1.05rem;
}

.svc-intro{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:72px;
  align-items:center;
}
.svc-intro img{
  width:100%;
  height:440px;
  object-fit:cover;
  border-radius:var(--radius);
}
.svc-intro h2{margin-bottom:20px}
.svc-intro p{margin-bottom:16px;font-size:1.02rem}

.detail-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.detail-card{
  background:var(--white);
  border:1px solid var(--grey-200);
  border-left:3px solid var(--green-500);
  padding:32px 30px;
}
.detail-card i{
  font-size:1.5rem;
  color:var(--navy-800);
  margin-bottom:18px;
  display:block;
}
.detail-card h3{font-size:1.05rem;margin-bottom:10px}
.detail-card p{font-size:.93rem}

/* ------------------------------------------------------------
   Proyectos
   ------------------------------------------------------------ */
.proj-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.proj-card{
  position:relative;
  height:300px;
  overflow:hidden;
  border-radius:var(--radius);
  cursor:pointer;
  isolation:isolate;
}
.proj-card img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.proj-card:hover img{transform:scale(1.06)}
.proj-card__overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,31,51,0) 35%,rgba(10,31,51,.9) 100%);
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:24px;
}
.proj-card__overlay h3{color:var(--white);font-size:1.05rem;margin-bottom:4px}
.proj-card__overlay span{
  font-size:.8rem;
  color:var(--green-400);
  font-family:var(--font-head);
  font-weight:600;
}
.empty-note{
  text-align:center;
  color:var(--text-muted);
  padding:48px 0;
  font-size:.95rem;
}

/* ------------------------------------------------------------
   Maquinaria
   ------------------------------------------------------------ */
.filters{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:40px;
}
.filters button{
  font-family:var(--font-head);
  font-size:.78rem;
  font-weight:600;
  color:var(--navy-800);
  border:1.5px solid var(--grey-300);
  border-radius:999px;
  padding:9px 20px;
  transition:var(--transition);
  background:var(--white);
}
.filters button:hover{border-color:var(--green-600);color:var(--green-700)}
.filters button.is-active{
  background:var(--navy-800);
  border-color:var(--navy-800);
  color:var(--white);
}

.maq-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.maq-card{
  background:var(--white);
  border:1px solid var(--grey-200);
  display:flex;
  flex-direction:column;
  transition:var(--transition);
}
.maq-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.maq-card__img{height:220px;overflow:hidden;background:var(--grey-100)}
.maq-card__img img{width:100%;height:100%;object-fit:cover}
.maq-card__body{padding:24px;display:flex;flex-direction:column;flex:1}
.maq-card__badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.badge{
  font-family:var(--font-head);
  font-size:.68rem;
  font-weight:700;
  padding:5px 12px;
  border-radius:999px;
}
.badge--cat{background:var(--grey-100);color:var(--navy-800);border:1px solid var(--grey-200)}
.badge--mod{background:rgba(59,155,120,.12);color:var(--green-700)}
.maq-card h3{font-size:1.05rem;margin-bottom:8px}
.maq-card p{
  font-size:.88rem;
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.maq-card .btn{margin-top:auto;justify-content:center}

/* ------------------------------------------------------------
   Modal genérico (proyectos y maquinaria)
   ------------------------------------------------------------ */
.modal{
  position:fixed;inset:0;z-index:300;
  display:none;
  align-items:center;
  justify-content:center;
  padding:24px;
}
.modal.is-open{display:flex}
.modal__backdrop{
  position:absolute;inset:0;
  background:rgba(10,31,51,.8);
  backdrop-filter:blur(3px);
}
.modal__box{
  position:relative;
  background:var(--white);
  width:100%;
  max-width:960px;
  max-height:90vh;
  overflow-y:auto;
  border-radius:var(--radius);
  border-top:4px solid var(--green-500);
}
.modal__close{
  position:absolute;
  top:14px;right:14px;
  z-index:2;
  width:40px;height:40px;
  border-radius:50%;
  background:var(--navy-900);
  color:var(--white);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
}
.modal__close:hover{background:var(--green-600)}
.modal__gallery{background:var(--navy-900)}
.modal__main-img{
  width:100%;
  height:420px;
  object-fit:contain;
  background:var(--navy-900);
}
.modal__thumbs{
  display:flex;
  gap:8px;
  padding:12px;
  overflow-x:auto;
}
.modal__thumbs img{
  width:76px;height:56px;
  object-fit:cover;
  cursor:pointer;
  border:2px solid transparent;
  border-radius:2px;
  opacity:.65;
  transition:var(--transition);
}
.modal__thumbs img.is-active,.modal__thumbs img:hover{opacity:1;border-color:var(--green-500)}
.modal__body{padding:36px 40px 44px}
.modal__body .maq-card__badges{margin-bottom:16px}
.modal__body h2{font-size:1.6rem;margin-bottom:6px}
.modal__meta{
  display:flex;
  gap:22px;
  flex-wrap:wrap;
  font-size:.85rem;
  color:var(--text-muted);
  margin-bottom:20px;
}
.modal__meta i{color:var(--green-600);margin-right:6px}
.modal__body > p{margin-bottom:22px;font-size:.98rem;white-space:pre-line}
.modal__feats{margin-bottom:28px;display:grid;gap:10px}
.modal__feats li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:.93rem;
  color:var(--text);
}
.modal__feats i{color:var(--green-600);margin-top:4px;font-size:.85rem}

@media (max-width:1080px){
  .proj-grid,.maq-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .svc-intro{grid-template-columns:1fr;gap:40px}
  .svc-intro img{height:340px}
  .detail-grid{grid-template-columns:1fr}
  .modal__body{padding:28px 22px 34px}
  .modal__main-img{height:280px}
}
@media (max-width:600px){
  .proj-grid,.maq-grid{grid-template-columns:1fr}
}

/* ------------------------------------------------------------
   Detalle con listas y tabla comparativa
   ------------------------------------------------------------ */
.detail-card ul{margin-top:14px;display:grid;gap:8px}
.detail-card ul li{
  font-size:.88rem;color:var(--text);
  padding-left:18px;position:relative;
}
.detail-card ul li::before{
  content:"";position:absolute;left:0;top:9px;
  width:8px;height:2px;background:var(--green-500);
}
.compare-wrap{overflow-x:auto}
.compare{
  width:100%;border-collapse:collapse;
  background:var(--white);border:1px solid var(--grey-200);
  min-width:640px;
}
.compare th{
  font-family:var(--font-head);font-size:.85rem;
  text-align:left;padding:18px 24px;
}
.compare th:first-child{background:var(--grey-100);color:var(--text-muted);width:50%}
.compare th:last-child{background:var(--navy-900);color:var(--green-400)}
.compare td{
  padding:16px 24px;font-size:.92rem;
  border-top:1px solid var(--grey-200);
  vertical-align:top;color:var(--text-muted);
}
.compare td:last-child{color:var(--text);border-left:1px solid var(--grey-200)}
.compare td:last-child::before{
  content:"\2713";color:var(--green-600);font-weight:700;margin-right:10px;
}

/* ------------------------------------------------------------
   Párrafos justificados (solicitud del cliente)
   ------------------------------------------------------------ */
main p{text-align:justify}
.form__note,.empty-note{text-align:center}

/* ------------------------------------------------------------
   Infografías corporativas
   ------------------------------------------------------------ */
.infographics{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-top:52px;
}
.infographics img{
  width:100%;
  height:auto;
  border-radius:var(--radius);
  background:var(--white);
  display:block;
}
.infographic-single{
  width:100%;
  max-width:960px;
  height:auto;
  border-radius:var(--radius);
  background:var(--white);
  display:block;
  margin:0 auto 48px;
}
.sectors__info{
  width:100%;
  height:auto;
  border-radius:var(--radius);
  background:var(--white);
  display:block;
}
@media (max-width:900px){
  .infographics{grid-template-columns:1fr;gap:16px}
}