/* ATLAS SOLAR — Sistema de diseño web
   Basado en el Manual de Identidad Visual */

:root{
  --amarillo:#FFC300;
  --azul:#00699D;
  --azul-oscuro:#18233d;
  --gris-oscuro:#a7a8ab;
  --gris-claro:#f1f1f1;
  --azul-claro:#e1f0fc;
  --blanco:#ffffff;
  --texto:#18233d;
  --texto-suave:#4a5568;
  --max:1180px;
  --r:4px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:17px;line-height:1.65;color:var(--texto);background:var(--blanco);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.raleway{font-family:'Raleway',sans-serif;font-weight:600;line-height:1.15;letter-spacing:-0.01em}
h1{font-size:clamp(2.1rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem)}
h3{font-size:1.22rem}
p{margin-bottom:1rem}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.center{text-align:center}
.lead{font-size:1.16rem;color:var(--texto-suave);max-width:60ch}
.lead.on-dark{color:rgba(255,255,255,.85)}
.eyebrow{font-family:'Raleway',sans-serif;font-weight:600;font-size:.78rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--amarillo);margin-bottom:14px}
.eyebrow.blue{color:var(--azul)}
section{padding:88px 0}
.tight{padding:60px 0}

/* NAV */
.nav{position:sticky;top:0;z-index:50;background:var(--azul);border-bottom:1px solid rgba(255,255,255,.12)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.nav .logo{width:170px}
.nav ul{display:flex;gap:30px;list-style:none;align-items:center}
.nav a{color:#fff;font-size:.94rem;opacity:.9;transition:opacity .18s}
.nav a:hover{opacity:1}
.nav .btn{padding:11px 20px;font-size:.9rem}
.burger{display:none;background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer}

/* BOTONES */
.btn{display:inline-block;font-family:'Raleway',sans-serif;font-weight:600;font-size:1rem;
  padding:16px 32px;border:0;border-radius:var(--r);cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;
  background:var(--amarillo);color:var(--azul-oscuro)}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(255,195,0,.32)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.1);box-shadow:none}
.btn-dark{background:var(--azul);color:#fff}
.btn-dark:hover{box-shadow:0 8px 22px rgba(0,105,157,.3)}
.btn-lg{padding:19px 40px;font-size:1.06rem}

/* HERO */
.hero{position:relative;background:var(--azul);color:#fff;overflow:hidden;padding:104px 0 96px}
.hero .wrap{position:relative;z-index:2}
.hero-copy{max-width:880px}
.hero h1{margin-bottom:22px}
.hero .lead{font-size:1.26rem;margin-bottom:34px;color:rgba(255,255,255,.88)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero-trust{display:flex;gap:32px;flex-wrap:wrap;font-size:.93rem;color:rgba(255,255,255,.82)}
.hero-trust span{display:flex;align-items:center;gap:9px}
.hero-trust .dot{width:7px;height:7px;background:var(--amarillo);border-radius:50%;flex:none}
/* sistema gráfico: rejilla de panel + rayos */
.grid-motif{position:absolute;right:-6%;bottom:-14%;width:640px;opacity:.16;z-index:1;pointer-events:none}
.ray-motif{position:absolute;left:-90px;top:-90px;width:340px;opacity:.13;z-index:1;pointer-events:none}

/* NICHOS */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:22px;margin-top:44px}
.card{border:1px solid #e3e8ee;border-radius:var(--r);padding:30px 26px;background:#fff;
  transition:border-color .2s,transform .2s,box-shadow .2s;display:block}
.card:hover{border-color:var(--azul);transform:translateY(-3px);box-shadow:0 14px 34px rgba(24,35,61,.09)}
.card .ic{width:44px;height:44px;margin-bottom:18px}
.card h3{margin-bottom:9px}
.card p{font-size:.98rem;color:var(--texto-suave);margin-bottom:14px}
.card .go{font-family:'Raleway',sans-serif;font-weight:600;font-size:.92rem;color:var(--azul)}

/* PILARES */
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:44px;margin-top:48px}
.pillar .n{font-family:'Raleway',sans-serif;font-weight:600;font-size:2.6rem;color:var(--amarillo);line-height:1;margin-bottom:14px}
.pillar h3{margin-bottom:10px}
.pillar p{font-size:1rem;color:var(--texto-suave)}

/* BANDA OSCURA */
.dark{background:var(--azul-oscuro);color:#fff}
.dark .lead,.form-band .lead{color:rgba(255,255,255,.85)}
.dark h2{color:#fff}
.tint{background:var(--gris-claro)}
.tint-blue{background:var(--azul-claro)}

/* PROCESO */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:30px;margin-top:48px;counter-reset:s}
.step{position:relative;padding-top:26px;border-top:3px solid rgba(255,255,255,.18)}
.step::before{counter-increment:s;content:"0" counter(s);position:absolute;top:-13px;left:0;
  background:var(--azul-oscuro);padding-right:12px;font-family:'Raleway',sans-serif;font-weight:600;
  font-size:.9rem;color:var(--amarillo);letter-spacing:.08em}
.step.on-light{border-top-color:#d7dde5}
.step.on-light::before{background:var(--gris-claro);color:var(--azul)}
.step h3{margin-bottom:8px;font-size:1.06rem}
.step p{font-size:.95rem;color:rgba(255,255,255,.75);margin:0}
.step.on-light p{color:var(--texto-suave)}

/* LISTA DE PREGUNTAS */
.qlist{margin-top:40px;border-top:1px solid #dfe5ec}
.qlist li{list-style:none;padding:20px 0 20px 42px;border-bottom:1px solid #dfe5ec;position:relative;font-size:1.05rem}
.qlist li::before{content:"";position:absolute;left:6px;top:29px;width:16px;height:2px;background:var(--amarillo)}

/* FORMULARIO */
.form-band{background:var(--azul);color:#fff;position:relative;overflow:hidden}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start;position:relative;z-index:2}
.form-box{background:#fff;border-radius:var(--r);padding:34px}
.field{margin-bottom:17px}
.field label{display:block;font-family:'Raleway',sans-serif;font-weight:600;font-size:.83rem;
  color:var(--azul-oscuro);margin-bottom:6px;letter-spacing:.02em}
.field input,.field select{width:100%;padding:13px 14px;border:1px solid #d3dae2;border-radius:var(--r);
  font-family:inherit;font-size:1rem;color:var(--texto);background:#fff;transition:border-color .16s}
.field input:focus,.field select:focus{outline:0;border-color:var(--azul);box-shadow:0 0 0 3px rgba(0,105,157,.11)}
.form-box .btn{width:100%;margin-top:8px}
.privacy{font-size:.82rem;color:var(--texto-suave);margin:14px 0 0;text-align:center}
.checklist{list-style:none;margin-top:26px}
.checklist li{padding-left:30px;position:relative;margin-bottom:15px;color:rgba(255,255,255,.9);font-size:1.02rem}
.checklist li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;
  border:2px solid var(--amarillo);border-right:0;border-top:0;transform:rotate(-45deg);height:8px}

/* NOTA */
.note{border-left:3px solid var(--amarillo);padding:16px 22px;background:#fff;margin-top:30px}
.note p{margin:0;font-size:1rem}
.dark .note{background:rgba(255,255,255,.06)}

/* FOOTER */
footer{background:var(--azul-oscuro);color:rgba(255,255,255,.68);padding:64px 0 30px;font-size:.94rem}
footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:44px;margin-bottom:44px}
footer .logo{width:180px;margin-bottom:18px}
footer h4{color:#fff;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer a:hover{color:var(--amarillo)}
.legal{border-top:1px solid rgba(255,255,255,.13);padding-top:24px;font-size:.85rem;color:rgba(255,255,255,.45)}

@media(max-width:860px){
  .nav ul{display:none}
  .burger{display:block}
  .form-grid{grid-template-columns:1fr;gap:36px}
  footer .cols{grid-template-columns:1fr;gap:32px}
  section{padding:64px 0}
  .grid-motif{width:420px;right:-18%;opacity:.1}
}

/* correcciones de contraste sobre fondos oscuros */
.dark .pillar p,.dark p,.dark li{color:rgba(255,255,255,.78)}
.dark .note p{color:#fff}
.dark .card{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.16)}
.dark .card h3{color:#fff}
.dark .card p{color:rgba(255,255,255,.75)}

/* ILUSTRACIONES */
.card .il{width:100%;height:auto;border-radius:3px;margin-bottom:18px;display:block}
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;margin-top:40px}
.split img{width:100%;border-radius:4px}
.split .txt p:last-child{margin-bottom:0}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:30px}}