:root{
  --navy:#002654; --navy-2:#0a3470; --navy-ink:#001a3a;
  --turq:#00b2aa; --turq-d:#008a84;
  --orange:#ee6d4e; --orange-d:#d4553a;
  --gray:#d6d6d6; --paper:#f3f5f8; --white:#fff;
  --ink:#14213a; --ink-2:#4a5670;
  --h:"Inter",system-ui,sans-serif; --b:"Work Sans",system-ui,sans-serif;
  --r:10px; --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--b);font-size:17px;line-height:1.6;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{font-family:var(--h);font-weight:900;line-height:1.05;letter-spacing:-.025em;margin:0}
p{margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--turq);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:var(--white);padding:8px 12px;z-index:99}
.skip:focus{left:8px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:999px;font:600 16px/1 var(--b);text-decoration:none;border:2px solid transparent;cursor:pointer;transition:background .15s,border-color .15s}
.btn-cta{background:var(--orange);color:var(--white)}
.btn-cta:hover{background:var(--orange-d)}
.btn-ghost{border-color:rgba(255,255,255,.45);color:var(--white);min-height:42px;padding:0 18px}
.btn-ghost:hover{border-color:var(--white)}
.btn-wa{background:var(--turq);color:var(--navy-ink)}
.btn-wa:hover{background:#19c7bf}

/* header */
.top{position:sticky;top:0;z-index:20;background:var(--navy)}
.top-in{display:flex;align-items:center;gap:32px;height:72px}
.brand img{width:132px}
.nav{display:flex;gap:28px;margin-left:auto}
.nav a{color:rgba(255,255,255,.82);text-decoration:none;font-weight:500;font-size:16px}
.nav a:hover{color:var(--white)}
@media (max-width:820px){.top-in{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:0;gap:10px;justify-content:space-between}.nav{order:3;width:calc(100% + 48px);margin:0 -24px;padding:6px 24px 12px;overflow-x:auto;gap:22px;white-space:nowrap}.nav a{font-size:15px}}

/* hero */
.hero{background:var(--navy);color:var(--white);position:relative;overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 56px),50% 100%,0 calc(100% - 56px));padding:40px 0 200px}
.hero-in{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;position:relative;min-height:540px}
.hero3d{position:relative;height:560px;margin-right:-120px;opacity:0;transition:opacity .8s}
.hero3d.listo{opacity:1}
.hero3d canvas{position:absolute;inset:0;width:100%!important;height:100%!important}
.hero h1{font-size:clamp(40px,6vw,76px);max-width:11ch;margin-top:24px}
.hero-lead{font-size:19px;color:rgba(255,255,255,.82);max-width:46ch;margin-top:24px}
.facts{list-style:none;padding:0;margin:36px 0 0;display:grid;gap:14px}
.facts li{padding-left:22px;position:relative;color:rgba(255,255,255,.82)}
.facts li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;background:var(--turq);clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%)}
.facts strong{color:var(--white);font-weight:600}
@media (max-width:900px){.hero-in{grid-template-columns:1fr;gap:0;min-height:0}.hero3d{height:340px;margin:0 -24px;order:-1}.hero{padding:16px 0 110px}.hero h1{margin-top:0}}

/* calculator */
.calc-band{position:relative;z-index:2;margin-top:-150px}
.calc{background:var(--white);color:var(--ink);border-radius:18px;padding:32px;box-shadow:0 40px 80px -30px rgba(0,20,50,.5),0 0 0 1px rgba(0,38,84,.06)}
.calc-in{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.calc-r{border-left:1.5px solid var(--gray);padding-left:40px;display:flex;flex-direction:column}
.calc h2{font-size:26px;color:var(--navy)}
.calc-hint{font-size:14px;color:var(--ink-2);margin:6px 0 20px}
@media (max-width:820px){.calc-band{margin-top:-90px}.calc{padding:24px}.calc-in{grid-template-columns:1fr;gap:8px}.calc-r{border:0;padding:0}}
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-size:14px;font-weight:600;color:var(--ink-2)}
.field small{font-weight:400}
input,select,textarea{font:16px/1.4 var(--b);color:var(--ink);background:var(--paper);border:1.5px solid transparent;border-radius:var(--r);padding:12px 14px;min-height:48px;width:100%}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--turq);background:var(--white)}
.unit{position:relative}
.unit span{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--ink-2);font-weight:500}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.total{display:block;padding-top:4px}
.total-n{display:block;font:900 clamp(40px,5vw,52px)/1 var(--h);letter-spacing:-.03em;color:var(--navy);font-variant-numeric:tabular-nums}
.total-s{display:block;font-size:14px;color:var(--ink-2);margin-top:6px}
.calc-plan{list-style:none;padding:0;margin:16px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc-plan li{font-size:12.5px;line-height:1.35;color:var(--ink-2)}
.calc-plan li::before{content:"";display:block;height:6px;border-radius:3px;background:var(--turq);margin-bottom:6px;width:var(--w,100%)}
.calc-plan li:first-child::before{background:var(--orange)}
.calc-plan b{display:block;color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.fine{font-size:13px;color:var(--ink-2);margin:16px 0 18px;line-height:1.45}
.calc .btn{width:100%;margin-top:auto}

/* sections */
.sec{padding:96px 0}
.calc-band+.sec{padding-top:88px}
.btns{display:flex;flex-wrap:wrap;gap:12px}
.btn-line{border-color:var(--navy);color:var(--navy)}
.btn-line:hover{background:var(--navy);color:var(--white)}
.sec-alt{background:var(--paper)}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head h2{font-size:clamp(30px,4vw,46px);color:var(--navy)}
.sec-head p{margin-top:16px;color:var(--ink-2);font-size:18px}
.sec-head .btn,.sec-head .btns{margin-top:28px}
.sec-head .btns .btn{margin-top:0}

/* tiers */
.tiers{border-top:2px solid var(--navy)}
.tier{display:grid;grid-template-columns:220px 1fr 110px 110px;gap:24px;padding:22px 0;border-bottom:1px solid var(--gray);align-items:baseline}
.tier-h{padding:12px 0;font-size:13px;font-weight:600;color:var(--ink-2)}
.tier-n b{display:block;font:800 19px/1.2 var(--h);color:var(--navy);letter-spacing:-.01em}
.tier-n small{color:var(--ink-2);font-size:14px}
.tier .num{text-align:right;font:800 24px/1 var(--h);color:var(--navy);font-variant-numeric:tabular-nums}
.tier-h .num{font:600 13px/1 var(--b);color:var(--ink-2)}
.tier .span2{grid-column:span 2;font-size:17px;color:var(--ink-2)}
.tier-star{background:linear-gradient(90deg,rgba(0,178,170,.09),transparent 70%);box-shadow:inset 4px 0 0 var(--turq);padding-left:16px;margin-left:-16px}
.note{font-size:14px;color:var(--ink-2);margin-top:16px}
@media (max-width:760px){
  .tier{grid-template-columns:1fr 1fr;gap:8px 16px}
  .tier>span:nth-child(2){grid-column:1/-1;order:3;font-size:15px;color:var(--ink-2)}
  .tier .num{order:2;text-align:left;font-size:20px}
  .tier-n{grid-column:1/-1}
  .tier-h{display:none}
  .tier .num::before{display:block;font:500 12px/1.6 var(--b);color:var(--ink-2)}
  .tier .num:nth-of-type(3)::before{content:"Hormigón"}
  .tier .num:nth-of-type(4)::before{content:"Metálica"}
  .tier .num.span2::before{content:none}
}

.pay{margin-top:72px}
.pay h3{font-size:clamp(24px,3vw,32px);color:var(--navy);max-width:22ch}
.steps{list-style:none;padding:0;margin:28px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:s}
.steps li{padding:20px 20px 0 0;border-top:6px solid var(--turq);display:grid;gap:8px;align-content:start}
.steps li:first-child{border-color:var(--orange)}
.steps b{font:800 20px/1.2 var(--h);color:var(--navy)}
.steps span{font-size:15px;color:var(--ink-2)}
@media (max-width:820px){.steps{grid-template-columns:1fr 1fr;row-gap:28px}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

/* empresas */
.emp{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.emp .sec-head{margin:0;position:sticky;top:110px}
.sys{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--gray);border:1px solid var(--gray);border-radius:14px;overflow:hidden}
.sys li{background:var(--white);padding:20px 22px;font-size:15px;color:var(--ink-2)}
.sys li:last-child:nth-child(odd){grid-column:1/-1}
.sys b{display:block;font:800 18px/1.3 var(--h);color:var(--navy);margin-bottom:4px}
@media (max-width:900px){.emp{grid-template-columns:1fr;gap:32px}.emp .sec-head{position:static}}
@media (max-width:480px){.sys{grid-template-columns:1fr}}

/* garantias */
.guar{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.g{border-left:4px solid var(--turq);padding-left:20px}
.g-n{font:900 88px/.9 var(--h);color:var(--navy);letter-spacing:-.04em}
.g-u{display:block;font:800 20px/1.2 var(--h);color:var(--turq-d);margin-top:6px}
.g p{margin-top:10px;color:var(--ink-2);font-size:16px;max-width:30ch}
.why{list-style:none;padding:0;margin:56px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:14px 40px}
.why li{padding-left:22px;position:relative}
.why li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;background:var(--navy);clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%)}
@media (max-width:760px){.guar,.why{grid-template-columns:1fr}.g-n{font-size:72px}}

/* contacto */
.sec-navy{background:var(--navy);color:var(--white)}
.con{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.con h2{font-size:clamp(30px,4vw,46px);max-width:14ch}
.con>div p{color:rgba(255,255,255,.82);margin:16px 0 28px;font-size:18px;max-width:42ch}
.lead{background:var(--white);color:var(--ink);border-radius:16px;padding:28px}
.lead .btn{width:100%;margin-top:4px}
.hp{position:absolute;left:-9999px}
.msg{margin-top:12px;font-size:15px;min-height:1.4em}
.msg.ok{color:var(--turq-d)} .msg.err{color:var(--orange-d)}
@media (max-width:900px){.con{grid-template-columns:1fr;gap:32px}}

/* footer */
.foot{background:var(--navy-ink);color:rgba(255,255,255,.7);padding:40px 0;font-size:14px}
.foot-in{display:grid;gap:10px}
.foot-s{max-width:60ch}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}