/* Voltamp Servicios Técnicos — hoja de estilos única
   Angel E. Caballero · Técnico Electromecánico · Matrícula N° 2632-B1° */

:root{
  --fondo:#0F172A;
  --fondo-alt:#1E293B;
  --fondo-claro:#F8FAFC;
  --ahorro:#10B981;
  --ahorro-oscuro:#047857;   /* variante para fondos claros: AA sobre #F8FAFC y #FFF */
  --proyectos:#38BDF8;
  --accion:#F59E0B;
  --texto:#F8FAFC;
  --texto-sec:#A9B7C9;
  --texto-oscuro:#0F172A;
  --texto-oscuro-sec:#475569;
  --borde:rgba(255,255,255,.10);
  --borde-claro:rgba(15,23,42,.12);
  --acento:var(--ahorro);
  --max:1140px;
  --radio:8px;
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  font-size:17px;line-height:1.7;
  background:var(--fondo);color:var(--texto);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:'Montserrat',system-ui,sans-serif;font-weight:700;line-height:1.2;margin:0 0 .6em;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5.2vw,3.1rem)}
h2{font-size:clamp(1.55rem,3.4vw,2.2rem)}
h3{font-size:1.2rem;font-weight:600}
p{margin:0 0 1.1em;max-width:68ch}
a{color:inherit}
img{max-width:100%;height:auto;display:block}
ul{padding-left:1.15em}
li{margin-bottom:.4em}
strong{color:#fff;font-weight:600}
mark.pendiente{background:#FDE047;color:#0F172A;padding:.05em .4em;border-radius:3px;font-weight:600}

:focus-visible{outline:3px solid var(--accion);outline-offset:3px;border-radius:3px}

.contenedor{max-width:var(--max);margin:0 auto;padding:0 24px}
section{padding:88px 0}
.centrado{text-align:center;margin-left:auto;margin-right:auto}
.centrado p{margin-left:auto;margin-right:auto}
.apagado{color:var(--texto-sec)}
.chico{font-size:.9rem}

/* ---------- fondos ---------- */
.bg-alt{background:var(--fondo-alt);border-top:1px solid var(--borde);border-bottom:1px solid var(--borde)}
.bg-claro{background:var(--fondo-claro);color:var(--texto-oscuro)}
.bg-claro p{color:var(--texto-oscuro-sec)}
.bg-claro strong{color:var(--texto-oscuro)}
.bg-claro .apagado{color:var(--texto-oscuro-sec)}
.bg-claro .etiqueta{color:var(--ahorro-oscuro)}
.bg-claro .btn-linea:hover{border-color:var(--ahorro-oscuro);color:var(--ahorro-oscuro)}

/* ---------- etiqueta ---------- */
.etiqueta{
  display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--acento);margin-bottom:14px;
}

/* ---------- botones ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  background:var(--accion);color:#1A1206;
  font-weight:600;font-size:1rem;
  padding:15px 28px;border-radius:var(--radio);
  text-decoration:none;border:2px solid var(--accion);
  transition:background .2s,color .2s,border-color .2s;
}
.btn:hover{background:#FBBF24;border-color:#FBBF24}
.btn-linea{background:transparent;color:var(--texto);border-color:rgba(255,255,255,.28)}
.btn-linea:hover{background:transparent;border-color:var(--acento);color:var(--acento)}
.bg-claro .btn-linea{color:var(--texto-oscuro);border-color:var(--borde-claro)}
.botones{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}

/* ---------- cabecera ---------- */
.cabecera{
  position:sticky;top:0;z-index:50;
  background:rgba(15,23,42,.93);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid var(--borde);
}
.cabecera .contenedor{display:flex;align-items:center;gap:16px;min-height:64px}
.marca{display:flex;align-items:center;gap:.5em;text-decoration:none;font-family:'Montserrat',sans-serif;font-weight:700;font-size:1.15rem;letter-spacing:.01em;margin-right:auto}
.marca-logo{width:38px;height:38px;flex:none;display:block}
.marca span{font-size:.7rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--texto-sec)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{text-decoration:none;font-size:.95rem;color:var(--texto-sec);white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{color:var(--texto)}
.hamburguesa{display:none;background:none;border:1px solid var(--borde);border-radius:6px;padding:8px 10px;cursor:pointer}
.hamburguesa svg{width:20px;height:20px;stroke:var(--texto);fill:none;stroke-width:2}

/* ---------- portada ---------- */
.portada{
  position:relative;padding:104px 0 96px;
  border-bottom:1px solid var(--borde);
  background:#0B1220;
}
.portada::before{
  content:"";position:absolute;inset:0;
  background:url('../img/plano-hero.webp') no-repeat 78% center/cover;
  opacity:.62;
}
.portada::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,#0F172A 0%,#0F172A 30%,rgba(15,23,42,.88) 52%,rgba(15,23,42,.45) 100%);
}
.portada .contenedor{position:relative;z-index:1}
.portada h1{max-width:16ch}
.portada .bajada{font-size:1.16rem;color:#C7D2DE;max-width:60ch}

.datos-linea{
  display:flex;flex-wrap:wrap;gap:10px 30px;margin-top:40px;
  padding-top:26px;border-top:1px solid var(--borde);
  font-size:.93rem;color:var(--texto-sec);
}
.datos-linea b{color:var(--texto);font-weight:600}

/* ---------- grillas ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:20px}
.mt{margin-top:44px}

/* ---------- tarjetas ---------- */
.tarjeta{
  background:var(--fondo);border:1px solid var(--borde);
  border-radius:var(--radio);padding:30px;
}
.bg-alt .tarjeta{background:rgba(15,23,42,.55)}
.bg-claro .tarjeta{background:#fff;border-color:var(--borde-claro)}
.tarjeta h3{margin-bottom:.5em}
.tarjeta p:last-child{margin-bottom:0}
.tarjeta .ico{width:30px;height:30px;stroke:var(--acento);fill:none;stroke-width:1.7;margin-bottom:16px}

/* servicios de la home */
.servicio{
  display:flex;flex-direction:column;
  border:1px solid var(--borde);border-radius:var(--radio);
  padding:36px;background:rgba(15,23,42,.55);
  border-top:3px solid var(--tono);
}
.servicio h3{font-family:'Montserrat',sans-serif;font-size:1.45rem;font-weight:700;color:#fff}
.servicio ul{color:var(--texto-sec);margin:0 0 26px;font-size:.97rem}
.servicio .mas{margin-top:auto;color:var(--tono);font-weight:600;text-decoration:none;display:inline-flex;gap:.4em;align-items:center}
.servicio .mas:hover{text-decoration:underline}

/* pasos numerados */
.pasos{counter-reset:p;display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:28px;margin-top:44px}
.paso{position:relative;padding-top:52px}
.paso::before{
  counter-increment:p;content:counter(p);
  position:absolute;top:0;left:0;
  width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;
  font-family:'Montserrat',sans-serif;font-weight:700;
  background:var(--acento);color:#06281D;
}
.paso h3{font-size:1.05rem}
.paso p{font-size:.95rem;color:var(--texto-sec);margin:0}

/* logos de clientes */
.clientes{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.cliente{
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:.95rem;
  padding:11px 18px;border:1px solid var(--borde-claro);border-radius:6px;
  background:#fff;color:var(--texto-oscuro);
}

/* figuras */
figure{margin:0}
figure img{border:1px solid var(--borde);border-radius:var(--radio);background:#0B1220}
.bg-claro figure img{border-color:var(--borde-claro)}
figcaption{font-size:.85rem;color:var(--texto-sec);margin-top:10px;line-height:1.5}
.bg-claro figcaption{color:var(--texto-oscuro-sec)}

/* caso destacado */
.caso{
  border:1px solid var(--borde);border-left:4px solid var(--acento);
  border-radius:var(--radio);padding:32px;background:rgba(15,23,42,.55);
}
.caso dl{display:grid;grid-template-columns:1fr auto;gap:.55em 1.5em;margin:0 0 4px;font-size:1rem}
.caso dt{color:var(--texto-sec)}
.caso dd{margin:0;text-align:right;font-weight:600;font-variant-numeric:tabular-nums}
.caso .fuerte{color:var(--acento);font-size:1.1rem}
.caso hr{border:0;border-top:1px solid var(--borde);margin:16px 0}

/* preguntas frecuentes */
.faq{max-width:820px;margin-inline:auto}
.faq details{border-bottom:1px solid var(--borde-claro);padding:6px 0}
.faq summary{
  cursor:pointer;list-style:none;padding:18px 34px 18px 0;position:relative;
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:1.05rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:6px;top:50%;width:9px;height:9px;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:translateY(-70%) rotate(45deg);transition:transform .2s;
}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details > p{padding:0 0 18px;margin:0;max-width:none}

/* trayectoria */
.certificados{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:26px;margin-top:44px}
.cert{display:block;text-decoration:none;color:inherit}
.cert img{border:1px solid var(--borde-claro);border-radius:6px;background:#fff;transition:transform .2s,box-shadow .2s}
.cert:hover img{transform:translateY(-3px);box-shadow:0 12px 28px rgba(15,23,42,.16)}
.cert .anio{font-family:'Montserrat',sans-serif;font-weight:700;color:var(--ahorro-oscuro);font-size:.85rem;letter-spacing:.06em;margin-top:14px}
.cert .emp{font-family:'Montserrat',sans-serif;font-weight:600;font-size:1rem;margin:2px 0 4px}
.cert .que{font-size:.88rem;color:var(--texto-oscuro-sec);line-height:1.5}

.rubro{margin-top:44px}
.rubro h3{
  font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ahorro);border-bottom:1px solid var(--borde-claro);padding-bottom:10px;
}
.rubro ul{list-style:none;padding:0;margin:0;columns:2;column-gap:44px}
.rubro li{break-inside:avoid;padding:9px 0 9px 20px;position:relative;font-size:.97rem;line-height:1.55}
.rubro li::before{content:"";position:absolute;left:0;top:.78em;width:7px;height:7px;border-radius:50%;background:var(--proyectos)}
.rubro li b{font-weight:600}
.rubro li span{display:block;color:var(--texto-oscuro-sec);font-size:.88rem}

/* franja de contacto */
.contacto{background:var(--fondo-alt);border-top:1px solid var(--borde);text-align:center}
.contacto h2{max-width:20ch;margin-inline:auto}
.contacto p{margin-inline:auto}
.contacto .botones{justify-content:center}

/* pie */
.pie{background:var(--fondo);border-top:1px solid var(--borde);padding:56px 0 40px;font-size:.92rem;color:var(--texto-sec)}
.pie-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
.pie h4{font-size:.78rem;letter-spacing:.13em;text-transform:uppercase;color:var(--texto);margin-bottom:14px}
.pie ul{list-style:none;padding:0;margin:0}
.pie li{margin-bottom:8px}
.pie a{text-decoration:none}
.pie a:hover{color:var(--texto);text-decoration:underline}
.pie .legal{margin-top:40px;padding-top:22px;border-top:1px solid var(--borde);font-size:.85rem}
.pie .legal p{max-width:none;margin:0 0 6px}

/* whatsapp flotante */
.wa{
  position:fixed;right:20px;bottom:20px;z-index:60;
  width:56px;height:56px;border-radius:50%;
  background:#25D366;display:grid;place-items:center;
  box-shadow:0 6px 20px rgba(0,0,0,.35);
}
.wa svg{width:30px;height:30px;fill:#fff}
.wa:hover{background:#1FB755}

/* ---------- responsive ---------- */
@media (max-width:900px){
  section{padding:64px 0}
  .grid-2{grid-template-columns:1fr;gap:36px}
  .grid-2 .invertir{order:2}
  .rubro ul{columns:1}
  .pie-grid{grid-template-columns:1fr;gap:28px}
  .cabecera{position:relative;z-index:60}
  .cabecera .contenedor{position:relative;flex-wrap:wrap}
  /* sin JS: el menú es una fila que envuelve y queda siempre a la vista */
  .nav{order:4;flex-basis:100%;flex-wrap:wrap;gap:0 20px;padding:2px 0 12px}
  /* con JS: se colapsa detrás del botón */
  .js .nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;flex-basis:auto;
    background:var(--fondo-alt);border-bottom:1px solid var(--borde);padding:8px 24px 18px;
    z-index:60;box-shadow:0 12px 24px rgba(0,0,0,.35);
  }
  .js .nav.abierto{display:flex}
  .js .nav a{padding:13px 0;border-bottom:1px solid var(--borde);font-size:1rem}
  .js .nav a:last-child{border-bottom:0}
  .hamburguesa{display:block;order:3}
  .portada{padding:72px 0 64px}
  .portada::before{opacity:.32}
  .portada::after{background:linear-gradient(180deg,rgba(15,23,42,.90) 0%,rgba(15,23,42,.94) 100%)}
}
@media (max-width:600px){
  body{font-size:16px}
  .tarjeta,.servicio,.caso{padding:24px}
  .marca-logo{width:38px;height:38px;flex:none;display:block}
.marca span{display:none}
  .certificados{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px}
  .caso dl{font-size:.95rem}
}

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

@media print{
  .cabecera,.wa,.contacto,.botones{display:none}
  body{background:#fff;color:#000}
}

/* temas por página */
.tema-proyectos{--acento:var(--proyectos)}
.tema-ahorro{--acento:var(--ahorro)}