:root{
  --azul:#233b9b;
  --azul-osc:#282a74;
  --azul-2:#235787;
  --celeste:#689dcc;
  --gris:#eaecee;
  --texto:#3a3a4a;
  --blanco:#fff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Roboto,system-ui,sans-serif;color:var(--texto);background:var(--blanco);line-height:1.6;font-size:17px}
img{max-width:100%;display:block}
img.missing{visibility:hidden}
.slide-logo.missing,.eco-in img.missing,.footer img.missing{display:none}
a{color:var(--azul)}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:99}

/* Header */
.header{background:var(--blanco);border-bottom:1px solid var(--gris);position:sticky;top:0;z-index:20}
.header-in{display:flex;align-items:center;justify-content:space-between;min-height:84px}
.logo{text-decoration:none}
.logo img{height:60px;width:auto}
.slide-logo,.eco-in img,.footer img{height:auto}
.logo-txt{font-family:Poppins,sans-serif;font-weight:700;color:var(--azul);font-size:1.3rem}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-family:Poppins,sans-serif;font-weight:500;font-size:.9rem;letter-spacing:.06em;text-transform:uppercase;text-decoration:none;color:var(--azul-osc)}
.nav a:hover{color:var(--celeste)}
.nav .ig{display:flex}
.menu-btn{display:none;background:none;border:0;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:26px;height:2px;background:var(--azul);margin:6px 0}

/* Hero / slider */
.hero{position:relative;background:var(--gris);overflow:hidden}
.slides{display:grid}
.slide{grid-area:1/1;background-size:cover;background-position:center;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:22px;padding:70px 70px 80px;min-height:520px;opacity:0;visibility:hidden;transition:opacity .7s}
.slide.is-active{opacity:1;visibility:visible}
.slide>*{position:relative}
.s-dark::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(20,28,80,.45),rgba(20,28,80,.7))}
.slide.s-dark p{color:#fff;font-size:1.4rem;text-shadow:0 1px 8px rgba(0,0,0,.4)}
.s-light::before{content:"";position:absolute;inset:0;background:rgba(255,255,255,.35)}
.s-dark .slide-logo{max-height:230px}
.s-dark .btn{background:#fff;color:var(--azul)}
.slide-box{display:flex;flex-direction:column;align-items:center;gap:18px;background:rgba(255,255,255,.9);padding:30px 36px;border-radius:14px;max-width:560px}
.s-card .slide-logo{max-height:140px}
.hero .dots button{border-color:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.25)}
.hero .dots button.on{background:#fff}
.slide-logo{max-height:180px;width:auto}
.slide p{font-family:Poppins,sans-serif;font-size:1.25rem;color:var(--azul-osc);max-width:640px}
.arrow{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.7);border:0;width:44px;height:44px;border-radius:50%;font-size:1.8rem;line-height:1;color:var(--azul);cursor:pointer}
.arrow:hover{background:#fff}
.prev{left:16px}.next{right:16px}
.dots{position:absolute;bottom:22px;left:0;right:0;display:flex;justify-content:center;gap:10px}
.dots button{width:11px;height:11px;border-radius:50%;border:2px solid var(--azul);background:transparent;cursor:pointer;padding:0}
.dots button.on{background:var(--azul)}

/* Botones */
.btn{display:inline-block;font-family:Poppins,sans-serif;font-weight:600;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;text-decoration:none;background:var(--azul);color:#fff;padding:13px 30px;border-radius:40px;transition:background .2s}
.btn:hover{background:var(--azul-2)}
.btn-line{background:transparent;color:var(--azul);border:2px solid var(--azul)}

/* Nosotros */
.about{padding:80px 20px 40px;max-width:860px;text-align:center;color:var(--azul-osc);font-size:1.15rem}
.about p+p{margin-top:16px}

/* Proyectos */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;padding-top:40px;padding-bottom:80px}
.card{text-align:center;scroll-margin-top:100px}
.card-img{display:block;aspect-ratio:755/540;background:var(--gris);border-radius:6px;overflow:hidden;margin-bottom:18px}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card-img img{transform:scale(1.04)}
.card h3{font-family:Poppins,sans-serif;font-size:1.1rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--azul);margin-bottom:6px}
.card h3 a{text-decoration:none}

/* Eco */
.eco{background:var(--gris);padding:60px 0}
.eco-in{display:flex;align-items:center;gap:40px}
.eco-in img{width:160px;flex-shrink:0}
.eco p{font-size:1.1rem;color:var(--azul-osc)}

/* Contacto */
.contact{text-align:center;padding:80px 20px;scroll-margin-top:90px}
.contact h2{font-family:Poppins,sans-serif;color:var(--azul);font-size:1.8rem;margin-bottom:8px}
.contact-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:22px}

/* Footer */
.footer{background:var(--azul);color:#fff;padding:40px 0}
.footer-in{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}
.footer img{height:60px;width:auto}
.footer a{color:#fff;text-transform:uppercase;letter-spacing:.1em;font-size:.85rem}
.footer small{opacity:.8}

/* Subpáginas */
.page-hero{background-size:cover;background-position:center;position:relative;display:flex;justify-content:center;align-items:center;min-height:360px;padding:40px}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(20,28,80,.45),rgba(20,28,80,.7))}
.page-hero img{position:relative;max-height:260px;width:auto;height:auto}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding-top:70px;padding-bottom:90px}
.split>img{border-radius:8px;width:100%;height:auto}
.split h1,.contact-page h1{font-family:Poppins,sans-serif;color:var(--azul);font-size:2.2rem;margin-bottom:16px;text-transform:uppercase;letter-spacing:.04em}
.lead{font-size:1.2rem;color:var(--azul-osc);margin-bottom:14px}
.contact-btns.left{justify-content:flex-start}
.contact-page{align-items:start}
.form{display:flex;flex-direction:column;gap:16px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:.95rem;color:var(--azul-osc)}
.form input,.form textarea{font:inherit;padding:12px 14px;border:1px solid #cfd3da;border-radius:6px;background:#fff}
.form input:focus,.form textarea:focus{outline:2px solid var(--celeste);border-color:var(--celeste)}
.form .btn{align-self:flex-start;border:0;cursor:pointer}
.form-note{font-size:.9rem;color:var(--azul-2);min-height:1.2em}
.contact-info{text-align:center;padding-top:60px}
.contact-info img{max-width:300px;height:auto;margin:0 auto 20px}
.contact-info hr{border:0;border-top:1px solid var(--gris);margin:0 auto 20px;width:60%}
.contact-info p{margin-bottom:8px;color:var(--azul-osc)}

/* Responsive */
@media (max-width:860px){
  .menu-btn{display:block}
  .nav{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--gris);display:none}
  .nav.open{display:flex}
  .nav a{padding:16px;width:100%;text-align:center;border-top:1px solid var(--gris);justify-content:center}
  .projects{grid-template-columns:1fr;max-width:520px}
  .slide{min-height:480px;padding:50px 56px 70px}
  .slide-box{padding:22px 20px}
  .s-dark .slide-logo{max-height:170px}
  .slide p{font-size:1.05rem}
  .eco-in{flex-direction:column;text-align:center}
  .split{grid-template-columns:1fr;gap:32px;padding-top:40px;padding-bottom:60px}
  .contact-info{padding-top:0}
  .page-hero{min-height:280px}
  .page-hero img{max-height:200px}
}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}