:root{
  --lc-navy:#0b2230;--lc-deep:#073441;--lc-teal:#0c7480;--lc-blue:#1f8daa;
  --lc-sand:#f4eadb;--lc-cream:#fbfaf7;--lc-gold:#f4b62e;--lc-green:#79a948;
  --lc-orange:#e88352;--lc-text:#102837;--lc-muted:#5e6e76;--lc-line:#dde4e5;
  --lc-shadow:0 18px 50px rgba(18,46,58,.10)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--lc-text);background:var(--lc-cream);line-height:1.65}a{color:inherit;text-decoration:none}.lc-container{width:min(1180px,calc(100% - 48px));margin:auto}.lc-kicker{text-transform:uppercase;letter-spacing:2.3px;font-size:12px;font-weight:800;color:var(--lc-teal);margin-bottom:18px}.lc-section-title{font-size:clamp(38px,4.8vw,58px);line-height:1.03;letter-spacing:-1.8px;margin:0 0 22px}.lc-section-text{color:var(--lc-muted);line-height:1.8;font-size:17px;max-width:590px}

.lc-header{height:84px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);display:flex;align-items:center;position:sticky;top:0;z-index:999;border-bottom:1px solid rgba(0,0,0,.05)}.lc-nav{width:min(1180px,calc(100% - 48px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:28px}.lc-brand{display:flex;align-items:center;gap:11px;font-weight:850;font-size:17px;white-space:nowrap}.lc-brand img{width:36px;height:36px}.lc-menu{display:flex;align-items:center;gap:26px;font-size:13px;font-weight:700}.lc-menu a:hover{color:var(--lc-teal)}.lc-menu a.is-active{color:var(--lc-teal)}.lc-nav-cta{background:var(--lc-navy);color:#fff!important;padding:12px 18px;border-radius:8px}.lc-mobile-toggle{display:none;background:none;border:0;font-size:28px;cursor:pointer;color:var(--lc-navy)}

.lc-hero{min-height:610px;display:flex;align-items:center;position:relative;overflow:hidden;background:linear-gradient(90deg,rgba(251,250,247,.98) 0%,rgba(251,250,247,.93) 37%,rgba(251,250,247,.54) 59%,rgba(251,250,247,.05) 100%),url('../img/hero-arch.svg') center/cover no-repeat}.lc-hero::after{content:'';position:absolute;right:-40px;bottom:-8px;width:min(50vw,860px);height:min(38vw,480px);background:url('../img/logo-arco-mark.png') right bottom/contain no-repeat;opacity:.17;pointer-events:none;z-index:1;filter:saturate(.75) brightness(1.02)}.lc-hero-copy{max-width:690px;position:relative;z-index:2}.lc-hero h1{font-size:clamp(52px,6.2vw,82px);line-height:.98;letter-spacing:-3.2px;margin:0 0 26px}.lc-hero p{max-width:590px;font-size:19px;line-height:1.72;color:#324751;margin:0}.lc-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}.lc-btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:8px;font-weight:800;font-size:14px;transition:.2s;border:1px solid transparent}.lc-btn:hover{transform:translateY(-2px)}.lc-btn-primary{background:var(--lc-navy);color:#fff}.lc-btn-outline{border-color:#83949b;color:var(--lc-text);background:rgba(255,255,255,.62)}.lc-btn-gold{background:var(--lc-gold);color:#102837}

.lc-project{padding:100px 0 96px;background:#fff}.lc-project-layout{display:grid;grid-template-columns:1.05fr 1.95fr;gap:72px;align-items:center}.lc-three{display:grid;grid-template-columns:repeat(3,1fr)}.lc-feature{padding:8px 28px;border-left:1px solid var(--lc-line)}.lc-feature:first-child{border-left:0}.lc-icon-circle{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:22px;margin-bottom:18px}.lc-icon-teal{background:#42aa9d}.lc-icon-yellow{background:#f5b925}.lc-icon-green{background:#32a78f}.lc-feature h3{font-size:20px;margin:0 0 12px}.lc-feature p{font-size:14px;line-height:1.68;color:#52636b;margin:0}

.lc-sectors{background:linear-gradient(180deg,#f7efe4 0%,var(--lc-sand) 100%);padding:100px 0}.lc-sector-layout{display:grid;grid-template-columns:.88fr 1.52fr;gap:76px;align-items:center}.lc-sector-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.lc-card{min-height:220px;background:white;border-radius:16px;padding:25px;transition:.25s;border:1px solid rgba(16,40,55,.04);box-shadow:0 4px 18px rgba(18,46,58,.03)}.lc-card:hover{transform:translateY(-5px);box-shadow:var(--lc-shadow)}.lc-card-icon{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:18px}.water{background:#dfeefa}.city{background:#e2edf7}.mobility{background:#e4eef8}.housing{background:#fbe5da}.nature{background:#e4f0d9}.energy{background:#fff0c9}.lc-card h3{margin:0 0 10px;font-size:18px}.lc-card p{margin:0;font-size:14px;line-height:1.62;color:#53636a}

.lc-method{background:#fff;padding:100px 0}.lc-method-layout{display:grid;grid-template-columns:.8fr 2fr;gap:72px}.lc-method-track{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.lc-method-track:before{content:"";position:absolute;left:8%;right:8%;top:19px;height:1px;background:#d5dcde}.lc-step{position:relative;z-index:2}.lc-step-number{width:38px;height:38px;border-radius:50%;color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;margin:0 auto 18px}.n1{background:#0b777d}.n2{background:#f2b423}.n3{background:#7ca637}.n4{background:#338ba8}.lc-step-icon{width:78px;height:78px;margin:0 auto 18px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:34px}.s1{background:#e4f2f2}.s2{background:#fff3d8}.s3{background:#eef5df}.s4{background:#e6f2f8}.lc-step h3{font-size:18px;margin:0 0 12px}.lc-step p{font-size:13px;line-height:1.65;color:#586970;margin:0 0 8px}.lc-method-message{grid-column:1/-1;background:#f8f9f7;border-radius:14px;margin-top:42px;padding:22px 28px;display:flex;align-items:center;gap:20px}.lc-message-icon{width:50px;height:50px;background:var(--lc-teal);border-radius:50%;color:white;display:flex;align-items:center;justify-content:center;flex:none;font-size:22px}

.lc-participate{background:linear-gradient(135deg,#004e58 0%,#006977 55%,#08798b 100%);color:white;padding:76px 0}.lc-part-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.lc-participate .lc-kicker{color:#a9e0db}.lc-participate h2{font-size:clamp(38px,4vw,52px);line-height:1.04;margin:0 0 22px;max-width:560px}.lc-participate p{color:#d2e6e8;font-size:16px;line-height:1.75;max-width:560px}.lc-gallery{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:150px 150px;gap:12px}.lc-photo{border-radius:13px;background-size:cover;background-position:center;min-height:120px}.lc-photo.big{grid-row:1/3;background-image:url('../img/community.svg')}.lc-photo.small1{background-image:url('../img/city.svg')}.lc-photo.small2{background-image:url('../img/arch-small.svg')}

.lc-closing{min-height:250px;display:flex;align-items:center;justify-content:center;text-align:center;padding:58px 20px;background:linear-gradient(rgba(250,245,235,.82),rgba(250,245,235,.82)),url('../img/closing.svg') center/cover no-repeat}.lc-closing h2{margin:0;font-size:clamp(30px,4vw,44px);line-height:1.15}.lc-closing strong{color:var(--lc-teal);font-size:1.16em}

.lc-footer{background:var(--lc-navy);color:#fff;padding:34px 0}.lc-footer-inner{width:min(1180px,calc(100% - 48px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px}.lc-footer-links{display:flex;gap:24px;flex-wrap:wrap}.lc-footer-links a{color:#cdd9dd;font-size:12px}

@media(max-width:980px){.lc-mobile-toggle{display:block}.lc-menu{display:none;position:absolute;top:84px;left:0;right:0;background:#fff;padding:18px 24px 24px;flex-direction:column;align-items:flex-start;border-bottom:1px solid var(--lc-line);box-shadow:0 16px 30px rgba(0,0,0,.06)}.lc-menu.is-open{display:flex}.lc-project-layout,.lc-sector-layout,.lc-method-layout,.lc-part-layout{grid-template-columns:1fr;gap:46px}.lc-sector-grid{grid-template-columns:repeat(2,1fr)}.lc-method-track{grid-template-columns:repeat(2,1fr)}.lc-method-track:before{display:none}.lc-three{grid-template-columns:1fr;gap:24px}.lc-feature{border-left:0;border-top:1px solid var(--lc-line);padding:28px 0 0}.lc-feature:first-child{border-top:0;padding-top:0}}
@media(max-width:650px){.lc-container,.lc-nav,.lc-footer-inner{width:min(100% - 30px,1180px)}.lc-header{height:70px}.lc-menu{top:70px}.lc-hero{min-height:650px;background:linear-gradient(180deg,rgba(251,250,247,.98) 0%,rgba(251,250,247,.93) 48%,rgba(251,250,247,.35) 100%),url('../img/hero-arch.svg') center/cover no-repeat}.lc-hero::after{right:-70px;bottom:-5px;width:min(92vw,520px);height:240px;opacity:.12}.lc-hero h1{font-size:50px;letter-spacing:-2px}.lc-actions{flex-direction:column;align-items:flex-start}.lc-sector-grid,.lc-method-track{grid-template-columns:1fr}.lc-step{text-align:center}.lc-gallery{grid-template-columns:1fr 1fr;grid-template-rows:190px 135px}.lc-photo.big{grid-column:1/3;grid-row:auto}.lc-footer-inner{flex-direction:column;align-items:flex-start}}

.lc-card-link{display:block;color:inherit;text-decoration:none;position:relative}
.lc-card-more{display:inline-block;margin-top:14px;font-size:12px;font-weight:800;color:var(--lc-blue)}
.lc-card-link:hover .lc-card-more{text-decoration:underline}

.lc-live-pulse{background:#082f4e;color:#fff;border-top:1px solid rgba(255,255,255,.06)}
.lc-live-pulse-inner{width:min(1180px,calc(100% - 48px));margin:auto;min-height:39px;display:flex;align-items:center;gap:22px;font-size:11px}
.lc-live-pulse-inner strong{color:#fff}.lc-live-pulse-inner span{color:#d5e4eb}.lc-live-pulse-inner a{margin-left:auto;color:#f4b62e;font-weight:800}
@media(max-width:650px){.lc-live-pulse-inner{width:min(100% - 30px,1180px);flex-wrap:wrap;padding:8px 0;gap:7px 14px}.lc-live-pulse-inner a{margin-left:0}}

/* ===== Header unificado (igual al de las secciones internas) ===== */
.site-header{height:70px;background:var(--lc-navy);color:#fff;display:flex;align-items:center;position:sticky;top:0;z-index:1000;box-shadow:0 5px 20px rgba(0,0,0,.1)}
.nav-shell{width:min(1380px,calc(100% - 48px));margin:auto;display:flex;align-items:center;gap:30px}
.site-header .brand{display:flex;align-items:center;gap:11px;font-weight:850;font-size:15px;white-space:nowrap;color:#fff}
.site-header .brand img{width:44px;height:40px}
.main-nav{display:flex;align-items:center;justify-content:center;gap:30px;font-size:12px;font-weight:750;flex:1;color:#fff}
.main-nav a{opacity:.87;padding:25px 0;position:relative;color:#fff}
.main-nav a:hover,.main-nav .active{opacity:1}
.main-nav .active:after{content:"";position:absolute;bottom:11px;left:0;right:0;height:3px;border-radius:5px;background:#43b4e8}
.nav-cta{background:#3aaee2;padding:10px 17px;border-radius:7px;font-size:12px;font-weight:850;color:#fff!important}
.menu-toggle{display:none;background:none;border:0;color:#fff;font-size:26px;margin-left:auto}
@media(max-width:1100px){
  .main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:var(--lc-navy);padding:18px 24px;flex-direction:column;align-items:flex-start;gap:0}
  .main-nav.open{display:flex}
  .main-nav a{padding:10px 0}
  .main-nav .active:after{display:none}
  .menu-toggle{display:block}
  .nav-cta{display:none}
  .nav-shell{width:min(100% - 28px,1280px)}
}

/* ===== Footer unificado (igual al de las secciones internas) ===== */
.site-footer{background:var(--lc-navy);color:#fff;padding:34px 0}
.site-footer .footer-content{width:min(1180px,calc(100% - 48px));margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.site-footer .footer-brand{display:flex;align-items:center;gap:11px;font-weight:850;font-size:15px;color:#fff}
.site-footer .footer-brand img{width:42px;height:38px}
.site-footer .footer-copy{text-align:center}
.site-footer .footer-copy strong{display:block;font-size:13px}
.site-footer .footer-copy span{font-size:12px;color:#cdd9dd}
.site-footer .footer-cta{background:#3aaee2;color:#fff!important;padding:11px 18px;border-radius:7px;font-size:12px;font-weight:850}
@media(max-width:650px){.site-footer .footer-content{flex-direction:column;text-align:center}}


/* Navegación principal de páginas independientes */
@media(min-width:1101px){
  .main-nav{gap:32px}
  .main-nav>a,.main-nav .lc-participa-toggle{font-size:12.5px}
}