/* ============================================================
   IEMSA · Ingeniería Eléctrica Moderna S.A. de C.V.
   Hoja de estilos principal — v1.0
   Paleta institucional: #234A9A azul · #E07230 naranja
   ============================================================ */

/* ---------- 1. Variables y reset ---------- */
:root{
  --azul:#234A9A;
  --azul-osc:#1A2F6B;
  --azul-noche:#0E1A38;
  --azul-cl:#EEF2FA;
  --naranja:#E07230;
  --naranja-cl:#F59A5E;
  --gris-t:#333333;
  --gris-m:#6B7280;
  --gris-cl:#E5E7EB;
  --gris-bg:#F7F8FA;
  --blanco:#FFFFFF;
  --sombra:0 4px 20px rgba(14,26,56,.08);
  --sombra-h:0 12px 34px rgba(14,26,56,.16);
  --radio:6px;
  --max:1200px;
  --t:.28s cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;
  line-height:1.7;
  color:var(--gris-t);
  background:var(--blanco);
  overflow-x:hidden;
}

img{max-width:100%;display:block;height:auto}
a{color:var(--azul);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--naranja)}
ul{list-style:none}

h1,h2,h3,h4{
  font-family:'Barlow Condensed','Inter',sans-serif;
  font-weight:700;
  line-height:1.12;
  color:var(--azul-osc);
  letter-spacing:.01em;
}
h1{font-size:clamp(2.4rem,5.5vw,4rem);text-transform:uppercase}
h2{font-size:clamp(1.9rem,3.8vw,2.9rem);text-transform:uppercase}
h3{font-size:clamp(1.25rem,2vw,1.5rem)}
h4{font-size:1.05rem}
p+p{margin-top:1rem}

/* ---------- 2. Utilidades ---------- */
.contenedor{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:24px}
.seccion{padding:88px 0}
.seccion--gris{background:var(--gris-bg)}
.seccion--azul{background:var(--azul-noche);color:#D7DEEC}
.seccion--azul h2,.seccion--azul h3{color:#fff}
.seccion--compacta{padding:60px 0}
.centrado{text-align:center}
.limitado{max-width:760px}
.centrado .limitado{margin-inline:auto}

.eyebrow{
  display:inline-block;
  font-family:'Barlow Condensed',sans-serif;
  font-size:.95rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--naranja);margin-bottom:10px;
}
.seccion--azul .eyebrow{color:var(--naranja-cl)}

.linea{width:56px;height:4px;background:var(--naranja);border-radius:2px;margin:18px 0 26px}
.centrado .linea{margin-inline:auto}

.plomo{font-size:1.12rem;color:var(--gris-m)}
.seccion--azul .plomo{color:#AEBAD3}

/* ---------- 3. Botones ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-family:'Barlow Condensed',sans-serif;
  font-size:1.05rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  padding:14px 30px;border:2px solid transparent;border-radius:var(--radio);
  cursor:pointer;transition:all var(--t);white-space:nowrap;
}
.btn--primario{background:var(--naranja);color:#fff}
.btn--primario:hover{background:#c85f22;color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(224,114,48,.35)}
.btn--secundario{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--secundario:hover{background:#fff;color:var(--azul-osc);border-color:#fff}
.btn--azul{background:var(--azul);color:#fff}
.btn--azul:hover{background:var(--azul-osc);color:#fff;transform:translateY(-2px)}
.btn--linea{background:transparent;color:var(--azul);border-color:var(--azul)}
.btn--linea:hover{background:var(--azul);color:#fff}
.btn-grupo{display:flex;flex-wrap:wrap;gap:14px}
.centrado .btn-grupo{justify-content:center}

/* ---------- 4. Encabezado / navegación ---------- */
.cabecera{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.97);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--gris-cl);
  transition:box-shadow var(--t);
}
.cabecera.scrolled{box-shadow:0 2px 14px rgba(14,26,56,.10)}
.cabecera__interior{display:flex;align-items:center;justify-content:space-between;gap:24px;height:78px}

.marca{display:flex;align-items:center;flex:0 0 auto}
.marca img{height:48px;width:auto;max-width:none}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  font-family:'Barlow Condensed',sans-serif;
  font-size:1.02rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--azul-osc);padding:9px 13px;border-radius:var(--radio);position:relative;
}
.nav a:hover{color:var(--naranja);background:var(--azul-cl)}
.nav a.activo{color:var(--naranja)}
.nav a.activo::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:var(--naranja);border-radius:2px}
.nav .btn{margin-left:10px;padding:11px 22px;font-size:.98rem}
.nav .btn:hover{background:#c85f22;color:#fff}

.hamburguesa{display:none;background:none;border:0;cursor:pointer;padding:10px;flex-direction:column;gap:5px}
.hamburguesa span{display:block;width:26px;height:2.5px;background:var(--azul-osc);border-radius:2px;transition:all var(--t)}
.hamburguesa.abierto span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburguesa.abierto span:nth-child(2){opacity:0}
.hamburguesa.abierto span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ---------- 5. Hero ---------- */
.hero{position:relative;min-height:min(88vh,760px);display:flex;align-items:center;color:#fff;overflow:hidden}
.hero__fondo{position:absolute;inset:0;z-index:0}
.hero__fondo img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero__fondo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(14,26,56,.94) 0%,rgba(14,26,56,.80) 45%,rgba(26,47,107,.45) 100%);
}
.hero__interior{position:relative;z-index:1;padding:90px 0;max-width:760px}
.hero__logo{height:66px;width:auto;margin-bottom:28px}
.hero h1{color:#fff;margin-bottom:6px}
.hero h1 em{font-style:normal;color:var(--naranja-cl);display:block}
.hero__lema{font-family:'Barlow Condensed',sans-serif;font-size:1.1rem;letter-spacing:.2em;text-transform:uppercase;color:var(--naranja-cl);font-weight:600;margin-bottom:16px}
.hero p{font-size:1.15rem;color:#D7DEEC;max-width:600px;margin-bottom:32px}

.hero--interno{min-height:auto}
.hero--interno .hero__interior{padding:74px 0 66px}
.hero--interno h1{font-size:clamp(2rem,4.4vw,3.2rem)}
.hero--interno p{margin-bottom:0}

/* migas */
.migas{font-size:.85rem;color:#9FB0CE;margin-bottom:14px;letter-spacing:.03em}
.migas a{color:#9FB0CE}
.migas a:hover{color:var(--naranja-cl)}

/* ---------- 6. Barra de cifras ---------- */
.cifras{background:var(--azul);color:#fff}
.cifras__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2px;text-align:center}
.cifras__item{padding:34px 16px;border-left:1px solid rgba(255,255,255,.14)}
.cifras__item:first-child{border-left:0}
.cifras__num{font-family:'Barlow Condensed',sans-serif;font-size:2.7rem;font-weight:700;line-height:1;color:#fff}
.cifras__num span{color:var(--naranja-cl)}
.cifras__lbl{font-size:.82rem;letter-spacing:.13em;text-transform:uppercase;color:#BFCCE6;margin-top:8px;font-weight:500}

/* ---------- 7. Rejillas y tarjetas ---------- */
.grid{display:grid;gap:26px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.tarjeta{
  background:#fff;border:1px solid var(--gris-cl);border-radius:var(--radio);
  padding:32px 28px;transition:all var(--t);position:relative;overflow:hidden;height:100%;
}
.tarjeta::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--naranja);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.tarjeta:hover{box-shadow:var(--sombra-h);transform:translateY(-4px);border-color:transparent}
.tarjeta:hover::before{transform:scaleX(1)}
.tarjeta__icono{width:48px;height:48px;margin-bottom:18px;color:var(--azul)}
.tarjeta__icono svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.tarjeta h3{margin-bottom:10px}
.tarjeta p{color:var(--gris-m);font-size:.99rem}
.tarjeta ul{margin-top:14px}
.tarjeta ul li{position:relative;padding-left:20px;font-size:.95rem;color:var(--gris-t);margin-bottom:7px}
.tarjeta ul li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;background:var(--naranja);border-radius:50%}

.seccion--azul .tarjeta{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14)}
.seccion--azul .tarjeta p{color:#AEBAD3}
.seccion--azul .tarjeta ul li{color:#D7DEEC}
.seccion--azul .tarjeta__icono{color:var(--naranja-cl)}

/* tarjeta con número */
.paso{background:#fff;border:1px solid var(--gris-cl);border-radius:var(--radio);padding:30px 26px;position:relative;height:100%}
.paso__num{font-family:'Barlow Condensed',sans-serif;font-size:2.6rem;font-weight:700;color:var(--azul-cl);line-height:1;margin-bottom:8px}
.seccion--azul .paso{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14)}
.seccion--azul .paso__num{color:rgba(255,255,255,.22)}
.paso h3{margin-bottom:8px}
.paso p{color:var(--gris-m);font-size:.97rem}
.seccion--azul .paso p{color:#AEBAD3}

/* ---------- 8. Bloque de texto + imagen ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split--inv .split__txt{order:2}
.split__img{position:relative;border-radius:var(--radio);overflow:hidden;box-shadow:var(--sombra)}
.split__img img{width:100%;height:100%;max-height:520px;object-fit:cover}
.split__img::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:5px;background:var(--naranja)}

/* ---------- 9. Lista de verificación ---------- */
.check{margin-top:22px}
.check li{position:relative;padding-left:34px;margin-bottom:13px;font-size:1rem}
.check li::before{
  content:"";position:absolute;left:0;top:3px;width:21px;height:21px;border-radius:50%;
  background:var(--naranja);
}
.check li::after{
  content:"";position:absolute;left:6.5px;top:9px;width:8px;height:4px;
  border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg);
}
.check li strong{color:var(--azul-osc);font-weight:600}
.seccion--azul .check li strong{color:#fff}

/* ---------- 10. Franja CTA ---------- */
.cta{position:relative;color:#fff;text-align:center;overflow:hidden}
.cta__fondo{position:absolute;inset:0;z-index:0}
.cta__fondo img{width:100%;height:100%;object-fit:cover}
.cta__fondo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,26,56,.92),rgba(35,74,154,.88))}
.cta__interior{position:relative;z-index:1;padding:86px 0}
.cta h2{color:#fff}
.cta p{color:#D7DEEC;max-width:620px;margin:0 auto 30px}

/* ---------- 11. Formularios ---------- */
.form-caja{background:#fff;border:1px solid var(--gris-cl);border-radius:var(--radio);box-shadow:var(--sombra);padding:38px}
.campo{margin-bottom:20px}
.campo label{display:block;font-size:.86rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--azul-osc);margin-bottom:7px}
.campo label .req{color:var(--naranja)}
.campo input,.campo select,.campo textarea{
  width:100%;padding:13px 15px;font-family:inherit;font-size:1rem;color:var(--gris-t);
  border:1.5px solid var(--gris-cl);border-radius:var(--radio);background:#fff;transition:all var(--t);
}
.campo input:focus,.campo select:focus,.campo textarea:focus{outline:none;border-color:var(--azul);box-shadow:0 0 0 3px rgba(35,74,154,.12)}
.campo textarea{resize:vertical;min-height:130px}
.campo input[type=file].archivo{
  padding:10px 12px;background:var(--gris-bg);border-style:dashed;cursor:pointer;font-size:.93rem;
}
.campo input[type=file].archivo::file-selector-button{
  font-family:'Barlow Condensed',sans-serif;font-size:.95rem;font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;
  background:var(--azul);color:#fff;border:0;border-radius:var(--radio);
  padding:9px 16px;margin-right:14px;cursor:pointer;transition:background var(--t);
}
.campo input[type=file].archivo::file-selector-button:hover{background:var(--azul-osc)}
.campo input[type=file].archivo:hover{border-color:var(--azul)}
.campo__ayuda{font-size:.83rem;color:var(--gris-m);margin-top:6px}
.campo--fila{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.consent{display:flex;gap:11px;align-items:flex-start;font-size:.9rem;color:var(--gris-m);margin-bottom:22px}
.consent input{width:18px;height:18px;margin-top:3px;flex:0 0 auto;accent-color:var(--naranja)}
.miel{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.aviso{padding:15px 18px;border-radius:var(--radio);font-size:.95rem;margin-bottom:24px}
.aviso--ok{background:#E7F6EC;border-left:4px solid #1E874B;color:#14562F}
.aviso--error{background:#FDECEA;border-left:4px solid #C0392B;color:#8C271C}

/* ---------- 12. Contacto lateral ---------- */
.contacto-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:48px;align-items:start}
.bloque-info{background:var(--azul-noche);color:#D7DEEC;border-radius:var(--radio);padding:34px 30px}
.bloque-info h3{color:#fff;margin-bottom:6px}
.bloque-info .linea{margin:14px 0 22px}
.bloque-info dl dt{font-size:.78rem;letter-spacing:.13em;text-transform:uppercase;color:var(--naranja-cl);font-weight:600;margin-top:20px}
.bloque-info dl dt:first-child{margin-top:0}
.bloque-info dl dd{font-size:1.02rem;color:#fff;margin-top:4px}
.bloque-info dl dd a{color:#fff}
.bloque-info dl dd a:hover{color:var(--naranja-cl)}

/* ---------- 13. Acordeón / FAQ ---------- */
.acordeon{border-top:1px solid var(--gris-cl)}
.acordeon__item{border-bottom:1px solid var(--gris-cl)}
.acordeon__btn{
  width:100%;background:none;border:0;cursor:pointer;text-align:left;
  padding:22px 44px 22px 0;position:relative;
  font-family:'Barlow Condensed',sans-serif;font-size:1.2rem;font-weight:600;color:var(--azul-osc);
}
.acordeon__btn::after{content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);font-size:1.7rem;color:var(--naranja);font-family:'Inter',sans-serif;font-weight:300;transition:transform var(--t)}
.acordeon__btn[aria-expanded="true"]::after{content:"–"}
.acordeon__panel{max-height:0;overflow:hidden;transition:max-height .35s ease}
.acordeon__panel p{padding-bottom:22px;color:var(--gris-m);font-size:1rem}

/* ---------- 14. Etiquetas normativas ---------- */
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag{
  font-family:'Barlow Condensed',sans-serif;font-size:.92rem;font-weight:600;letter-spacing:.07em;
  padding:7px 15px;border:1.5px solid var(--gris-cl);border-radius:100px;color:var(--azul-osc);background:#fff;
}
.seccion--azul .tag{border-color:rgba(255,255,255,.24);color:#fff;background:rgba(255,255,255,.06)}

/* ---------- 15. Cita ---------- */
.cita{
  border-left:5px solid var(--naranja);padding:8px 0 8px 28px;
  font-family:'Barlow Condensed',sans-serif;font-size:clamp(1.4rem,2.6vw,2rem);
  font-weight:600;line-height:1.3;color:var(--azul-osc);
}
.seccion--azul .cita{color:#fff}

/* ---------- 16. Pie de página ---------- */
.pie{background:var(--azul-noche);color:#93A3C0;font-size:.94rem;padding-top:64px}
.pie__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px}
.pie h4{color:#fff;font-size:1.05rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:18px}
.pie a{color:#93A3C0}
.pie a:hover{color:var(--naranja-cl)}
.pie li{margin-bottom:9px}
.pie__marca{display:flex;align-items:center;margin-bottom:18px}
.pie__marca img{height:54px;width:auto;max-width:100%}
.pie__lema{color:var(--naranja-cl);font-family:'Barlow Condensed',sans-serif;letter-spacing:.16em;text-transform:uppercase;font-size:.9rem;margin-top:14px}
.pie__base{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:.85rem}

/* ---------- 16b. Botón flotante de WhatsApp ---------- */
.wa{
  position:fixed;right:22px;bottom:22px;z-index:200;
  display:flex;align-items:center;gap:0;
  height:58px;padding:0 15px;border-radius:100px;
  background:#25D366;color:#fff;
  box-shadow:0 6px 22px rgba(0,0,0,.22);
  overflow:hidden;max-width:58px;
  transition:max-width .4s cubic-bezier(.2,.7,.3,1),box-shadow var(--t),transform var(--t);
}
.wa:hover,.wa:focus-visible{color:#fff;max-width:280px;box-shadow:0 10px 28px rgba(37,211,102,.42);transform:translateY(-2px)}
.wa svg{width:28px;height:28px;fill:#fff;flex:0 0 auto}
.wa__txt{
  font-family:'Barlow Condensed',sans-serif;font-size:1.05rem;font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;
  padding-left:12px;opacity:0;transition:opacity .3s ease .1s;
}
.wa:hover .wa__txt,.wa:focus-visible .wa__txt{opacity:1}

/* pulso sutil para atraer la mirada, solo al cargar */
.wa::after{
  content:"";position:absolute;inset:0;border-radius:100px;
  border:2px solid #25D366;animation:wa-pulso 2.6s ease-out 3;
}
@keyframes wa-pulso{
  0%{transform:scale(1);opacity:.7}
  70%{transform:scale(1.35);opacity:0}
  100%{transform:scale(1.35);opacity:0}
}
.wa:hover::after{animation:none}

@media (max-width:760px){
  .wa{right:16px;bottom:16px;height:54px;padding:0 13px;max-width:54px}
  .wa:hover{max-width:54px}
  .wa__txt{display:none}
}
@media print{.wa{display:none}}
@media (prefers-reduced-motion:reduce){.wa::after{animation:none}}

/* ---------- 17. Animación al entrar ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 18. Responsive ---------- */
@media (max-width:1024px){
  .pie__grid{grid-template-columns:1fr 1fr;gap:34px}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .split{gap:36px}
}

@media (max-width:900px){
  .nav{
    position:fixed;inset:78px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--gris-cl);padding:12px 24px 26px;
    box-shadow:0 14px 30px rgba(14,26,56,.12);
    transform:translateY(-130%);transition:transform .32s ease;max-height:calc(100vh - 78px);overflow-y:auto;
  }
  .nav.abierto{transform:translateY(0)}
  .nav a{padding:14px 4px;border-bottom:1px solid var(--gris-cl)}
  .nav a.activo::after{display:none}
  .nav .btn{margin:16px 0 0;justify-content:center}
  .hamburguesa{display:flex}
  .contacto-grid{grid-template-columns:1fr;gap:32px}
}

@media (max-width:760px){
  body{font-size:16px}
  .seccion{padding:62px 0}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:30px}
  .split--inv .split__txt{order:0}
  .cifras__grid{grid-template-columns:repeat(2,1fr)}
  .cifras__item{border-left:0;border-top:1px solid rgba(255,255,255,.14);padding:26px 12px}
  .cifras__item:nth-child(-n+2){border-top:0}
  .campo--fila{grid-template-columns:1fr;gap:0}
  .form-caja{padding:26px 22px}
  .pie__grid{grid-template-columns:1fr;gap:30px;padding-bottom:36px}
  .hero{min-height:auto}
  .hero__interior{padding:64px 0}
  .hero__logo{height:48px;margin-bottom:22px}
  .marca img{height:40px}
  .cabecera__interior{height:70px}
  .nav{inset:70px 0 auto 0;max-height:calc(100vh - 70px)}
  .pie__marca img{height:46px}
  .btn{width:100%;justify-content:center}
  .btn-grupo{flex-direction:column}
}

/* ---------- 19. Impresión ---------- */
@media print{
  .cabecera,.nav,.hamburguesa,.cta,.pie__base{display:none}
  body{font-size:12pt;color:#000}
  .hero__fondo,.cta__fondo{display:none}
  .hero{color:#000;min-height:auto}
  .hero h1,.hero p{color:#000}
}