/* BAT SRL - estilos. Sin fuentes ni recursos externos (compatible con CSP estricta). */
:root{
  --navy:#0b2545;
  --navy-2:#13315c;
  --ink:#1b2430;
  --muted:#5a6676;
  --line:#e3e8ef;
  --bg:#ffffff;
  --tint:#f4f7fb;
  --blue:#2b7fff;
  --teal:#12b5cb;
  --amber:#f5a524;
  --radius:14px;
  --shadow:0 1px 2px rgba(11,37,69,.06),0 8px 24px rgba(11,37,69,.08);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:1.0625rem}
img,svg{max-width:100%}
a{color:var(--blue)}
a:hover{color:var(--navy-2)}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}

.wrap{width:min(1120px,100% - 2.5rem);margin-inline:auto}
.narrow{width:min(760px,100% - 2.5rem)}
.center{text-align:center}
.plain{list-style:none;margin:0;padding:0}
.small{font-size:.9rem;color:var(--muted)}
.icon{width:1.5rem;height:1.5rem;flex:none}

.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:#111;padding:.6rem 1rem;z-index:100;font-weight:600}
.skip:focus{left:.5rem;top:.5rem}

/* Encabezado */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:1rem}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--navy);font-size:1.35rem;letter-spacing:.02em}
.brand .mark{width:38px;height:38px;color:var(--navy)}
.brand-text strong{font-weight:800}
.brand-light{color:#fff}.brand-light .mark{color:#fff}
.nav{display:flex;align-items:center;gap:1.5rem}
.nav a:not(.btn){color:var(--ink);text-decoration:none;font-weight:500}
.nav a:not(.btn):hover{color:var(--blue)}
.nav-toggle{display:none;background:none;border:0;padding:.5rem;color:var(--navy);cursor:pointer;border-radius:8px}
.nav-toggle .i-close{display:none}
.nav-toggle[aria-expanded="true"] .i-open{display:none}
.nav-toggle[aria-expanded="true"] .i-close{display:block}

/* Botones */
.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--navy);color:#fff;border:2px solid var(--navy);padding:.8rem 1.4rem;border-radius:999px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;transition:transform .15s,background .15s,box-shadow .15s}
.btn:hover{background:var(--navy-2);border-color:var(--navy-2);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn .icon{width:1.1rem;height:1.1rem}
.btn-small{padding:.5rem 1.1rem;font-size:.95rem}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.section:not(.section-tint) .btn-ghost,.legal .btn-ghost{color:var(--navy);border-color:var(--navy)}
.section:not(.section-tint) .btn-ghost:hover,.legal .btn-ghost:hover{background:var(--navy);color:#fff}

/* Hero */
.hero{background:radial-gradient(1100px 500px at 85% -10%,rgba(43,127,255,.35),transparent 60%),radial-gradient(700px 400px at 0% 110%,rgba(18,181,203,.25),transparent 60%),linear-gradient(160deg,var(--navy),#0e2f58);color:#fff;padding:clamp(3rem,8vw,6rem) 0}
.hero-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:3rem;align-items:center}
.eyebrow{margin:0 0 .6rem;font-size:.82rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.hero .eyebrow{color:var(--amber)}
.hero h1{font-size:clamp(2rem,4.6vw,3.2rem);line-height:1.12;margin:.2rem 0 1rem;letter-spacing:-.01em}
.lead{font-size:1.2rem;color:#d6e2f3;max-width:56ch}
.cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero .btn:not(.btn-ghost){background:var(--amber);border-color:var(--amber);color:#1a1200}
.hero .btn:not(.btn-ghost):hover{background:#ffb93d;border-color:#ffb93d;color:#1a1200}

.hero-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:1.4rem;backdrop-filter:blur(6px)}
.badges{list-style:none;margin:0;padding:0;display:grid;gap:1rem}
.badges li{display:flex;gap:.9rem;align-items:flex-start;padding-bottom:1rem;border-bottom:1px solid rgba(255,255,255,.15)}
.badges li:last-child{border:0;padding-bottom:0}
.badges .icon{width:2rem;height:2rem;color:var(--amber);margin-top:.1rem}
.badges strong{display:block;line-height:1.3}
.badges span{display:block;color:#c3d3ea;font-size:.95rem}

/* Secciones */
.section{padding:clamp(3rem,7vw,5.5rem) 0}
.section-tint{background:var(--tint)}
.section-head{max-width:640px;margin-bottom:2.5rem}
.section-head.center{margin-inline:auto;text-align:center}
h2{font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.2;margin:0 0 .6rem;color:var(--navy);letter-spacing:-.01em}
h3{font-size:1.15rem;line-height:1.35;margin:.2rem 0 .5rem;color:var(--navy)}
.section-head p{color:var(--muted);margin:0}

.grid{display:grid;gap:1.4rem}
.cols-3{grid-template-columns:repeat(3,1fr)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;transition:box-shadow .2s,transform .2s,border-color .2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#cfd9e8}
.card p{margin:0;color:var(--muted)}
.ico{display:inline-grid;place-items:center;width:3rem;height:3rem;border-radius:12px;background:#eaf2ff;color:var(--blue);margin-bottom:.8rem}
.ico .icon{width:1.6rem;height:1.6rem}

.sector{background:#fff;border-radius:var(--radius);padding:1.8rem;border-top:5px solid var(--blue);box-shadow:0 1px 2px rgba(11,37,69,.05)}
.sector p{margin:0;color:var(--muted)}
.sector-ico{display:inline-grid;place-items:center;width:3.2rem;height:3.2rem;border-radius:50%;margin-bottom:.6rem}
.sector-ico .icon{width:1.7rem;height:1.7rem}
.sector-gas{border-color:var(--blue)}.sector-gas .sector-ico{background:#e5efff;color:var(--blue)}
.sector-elec{border-color:var(--amber)}.sector-elec .sector-ico{background:#fff2da;color:#b87400}
.sector-water{border-color:var(--teal)}.sector-water .sector-ico{background:#dcf6fa;color:#0b8da0}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center}
.checks{list-style:none;margin:1.2rem 0 0;padding:0;display:grid;gap:.7rem}
.checks li{display:flex;gap:.7rem;align-items:flex-start}
.checks .icon{color:#0f9d6b;width:1.3rem;height:1.3rem;margin-top:.2rem}
.panel{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff;border-radius:var(--radius);padding:1.6rem;display:grid;gap:1.2rem;box-shadow:var(--shadow)}
.panel-row{display:flex;gap:1rem;align-items:flex-start}
.panel-row+.panel-row{border-top:1px solid rgba(255,255,255,.18);padding-top:1.2rem}
.panel .icon{width:2.2rem;height:2.2rem;color:var(--amber)}
.panel strong{display:block}
.panel span{color:#c3d3ea;font-size:.95rem}

.clients{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}
.clients li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:.8rem 1.5rem;font-weight:600;color:var(--navy)}

/* Contacto */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:start}
.contact-list{list-style:none;margin:1.5rem 0 1rem;padding:0;display:grid;gap:.9rem}
.contact-list li{display:flex;gap:.8rem;align-items:center}
.contact-list .icon{color:var(--blue)}
.contact-list a{color:var(--ink);text-decoration:none;font-weight:500}
.contact-list a:hover{color:var(--blue);text-decoration:underline}

.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem;box-shadow:var(--shadow)}
.field{margin-bottom:1rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
label{display:block;font-weight:600;margin-bottom:.3rem;font-size:.95rem}
.opt{font-weight:400;color:var(--muted)}
input[type=text],input[type=email],input[type=tel],textarea{width:100%;font:inherit;color:var(--ink);background:#fff;border:1.5px solid #c9d3e0;border-radius:10px;padding:.7rem .85rem;transition:border-color .15s,box-shadow .15s}
input:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(43,127,255,.18)}
textarea{resize:vertical;min-height:130px}
[aria-invalid="true"]{border-color:#c62828!important}
.err-msg{color:#b71c1c;font-size:.9rem;margin:.3rem 0 0}
.check{display:flex;gap:.6rem;align-items:flex-start}
.check input{margin-top:.35rem;width:1.1rem;height:1.1rem;flex:none}
.check label{font-weight:400;margin:0}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.notice{border-radius:10px;padding:1rem 1.2rem;margin-bottom:1.2rem}
.notice.ok{background:#e6f6ee;border:1px solid #9fd8b9;color:#0b5b36}
.notice.err{background:#fdecec;border:1px solid #f1b0b0;color:#8a1c1c}

/* Pie */
.site-footer{background:var(--navy);color:#c3d3ea;padding-top:3rem}
.foot-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:2rem;padding-bottom:2rem}
.foot-title{color:#fff;font-size:1rem;margin:0 0 .8rem}
.foot-note{margin:.8rem 0 0;max-width:34ch}
.site-footer a{color:#c3d3ea;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .plain li{margin-bottom:.45rem}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;border-top:1px solid rgba(255,255,255,.14);padding:1.1rem 0;font-size:.9rem}

/* Legal */
.legal h1{font-size:clamp(1.8rem,4vw,2.5rem);color:var(--navy);margin:0 0 .5rem}
.legal h2{font-size:1.3rem;margin-top:2rem}

/* Responsive */
@media (max-width:900px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr;gap:2rem}
  .cols-3{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-toggle{display:inline-flex}
  .nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:.5rem 1.25rem 1rem;display:none;box-shadow:0 12px 24px rgba(11,37,69,.1)}
  .nav.open{display:flex}
  .nav a:not(.btn){padding:.8rem 0;border-bottom:1px solid var(--line)}
  .nav .btn{justify-content:center;margin-top:.8rem}
  .cols-3,.row,.foot-grid{grid-template-columns:1fr}
}
/* Sin JavaScript el menú queda visible */
.no-js .nav{display:flex}
@media print{.site-header,.cta,form{display:none}}