/* =========================================================
   NEES — Nueva Era de Energía Solar
   Stylesheet — mobile-first
   ========================================================= */

:root{
  --gris: #4A4A4A;
  --gris-suave: #6B6B6B;
  --naranja: #F7941D;
  --rojo: #EF2D2A;
  --amarillo: #FDB515;
  --bg-claro: #F8F8F8;
  --blanco: #FFFFFF;

  --gradiente-sol: linear-gradient(135deg, var(--amarillo) 0%, var(--naranja) 55%, var(--rojo) 100%);

  --font-head: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(74,74,74,0.08);
  --shadow-md: 0 12px 30px rgba(74,74,74,0.12);
  --container-w: 1180px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--gris);
  background: var(--blanco);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }

h1, h2, h3, h4{
  font-family: var(--font-head);
  color: var(--gris);
  line-height: 1.2;
  margin: 0 0 .5em;
}

h1{ font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; }
h2{ font-size: clamp(1.6rem, 3.4vw, 2.4rem); font-weight: 700; }
h3{ font-size: 1.2rem; font-weight: 700; }

p{ margin: 0 0 1em; }

a{ color: inherit; text-decoration: none; }

ul, ol{ margin: 0; padding: 0; list-style: none; }

.container{
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 20px;
}
.container.narrow{ max-width: 760px; }

.section{ padding: 72px 0; }
.text-center{ text-align: center; }

.section-tag{
  display: inline-block;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: .8rem;
  color: var(--naranja);
  margin-bottom: 10px;
}

.lead{
  font-size: 1.08rem;
  color: var(--gris-suave);
  max-width: 640px;
  margin: 0 auto 1.2em;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gris);
  color: #fff;
  padding: 10px 16px;
  z-index: 999;
}
.skip-link:focus{ left: 10px; top: 10px; }

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .98rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-2px); }
.btn:active{ transform: translateY(0); }

.btn-primary{
  background: var(--gradiente-sol);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover{ box-shadow: var(--shadow-md); }

.btn-ghost{
  background: transparent;
  color: var(--gris);
  border-color: rgba(74,74,74,.25);
}
.btn-ghost:hover{ border-color: var(--naranja); color: var(--naranja); }

.btn-white{
  background: #fff;
  color: var(--rojo);
}

.btn-lg{ padding: 16px 32px; font-size: 1.05rem; }

/* ---------- Header ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(74,74,74,.08);
  transition: box-shadow .2s ease;
}
.site-header.scrolled{ box-shadow: var(--shadow-sm); }

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand{ display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon{ width: 40px; height: 40px; }
.brand-name{
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--gris);
  letter-spacing: .02em;
}

.main-nav ul{ display: flex; gap: 26px; }
.main-nav a{
  font-weight: 600;
  font-size: .95rem;
  color: var(--gris);
  padding: 6px 0;
  position: relative;
}
.main-nav a:hover{ color: var(--naranja); }

.header-cta{ flex-shrink: 0; }

.menu-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.menu-toggle span{
  display: block;
  height: 2px;
  width: 100%;
  background: var(--gris);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}
.hero-media{
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}
.hero-overlay{
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(30,24,18,.55) 0%, rgba(30,20,15,.72) 60%, rgba(20,14,10,.85) 100%);
}
.hero-content{
  position: relative;
  z-index: 1;
  padding-top: 60px;
  padding-bottom: 60px;
  max-width: 760px;
}
.hero .eyebrow{
  display: inline-block;
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.3);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.hero h1{ color: #fff; margin-bottom: .5em; }
.hero-sub{
  font-size: 1.1rem;
  color: rgba(255,255,255,.92);
  max-width: 560px;
}
.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.hero .btn-ghost{
  color: #fff;
  border-color: rgba(255,255,255,.5);
}
.hero .btn-ghost:hover{ border-color: #fff; color: #fff; background: rgba(255,255,255,.08); }

/* ---------- Problema ---------- */
.problema{ background: var(--bg-claro); }
.problem-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 36px;
}
.problem-grid li{
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}
.problem-grid p{ margin: 0; font-weight: 600; }
.pill-icon{
  font-size: 1.6rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(253,181,21,.18), rgba(239,45,42,.18));
}

/* ---------- Cards / Soluciones ---------- */
.cards-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 40px;
}
.card{
  background: #fff;
  border: 1px solid rgba(74,74,74,.08);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover{ transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon{
  font-size: 1.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--gradiente-sol);
  margin-bottom: 16px;
}
.card p{ color: var(--gris-suave); margin-bottom: 0; }

/* ---------- Como funciona ---------- */
.como-funciona{ background: var(--bg-claro); }
.steps{
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 40px;
  counter-reset: step;
}
.steps li{
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
}
.step-num{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradiente-sol);
  color: #fff;
  font-weight: 800;
  font-family: var(--font-head);
  margin-bottom: 14px;
}
.steps p{ color: var(--gris-suave); margin-bottom: 0; }

/* ---------- Proyectos / escenarios reales ---------- */
.proyectos{ background: var(--bg-claro); }

.scenario-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 40px;
}

.scenario-card{
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1fr;
}

.scenario-media{
  position: relative;
  background: #000;
}
.scenario-media--photo img{ width: 100%; height: 100%; object-fit: cover; display: block; }
.scenario-video{
  width: 100%;
  display: block;
  aspect-ratio: 4 / 3;
  background: #000;
  object-fit: cover;
}
.scenario-media--photo{ aspect-ratio: 4 / 3; }

.scenario-flag{
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--gris);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 6px 12px;
  border-radius: 999px;
}

.scenario-body{ padding: 26px 24px 30px; }
.scenario-title{ font-size: 1.25rem; margin-bottom: .35em; }
.scenario-case{
  font-weight: 700;
  color: var(--naranja);
  font-size: .9rem;
  margin-bottom: .8em;
}
.scenario-text{ color: var(--gris-suave); }

.scenario-badges{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.scenario-badges li{
  font-size: .76rem;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(253,181,21,.14), rgba(239,45,42,.14));
  color: var(--gris);
  padding: 6px 12px;
  border-radius: 999px;
}

.scenario-specs{
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
}
.scenario-specs li{
  padding-left: 24px;
  position: relative;
  color: var(--gris-suave);
  font-size: .92rem;
}
.scenario-specs li::before{
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--naranja);
  font-weight: 800;
}

.scenario-micro{
  font-size: .86rem;
  color: var(--gris-suave);
  font-style: italic;
  border-left: 3px solid var(--naranja);
  padding-left: 12px;
  margin-bottom: 0;
}

.proyectos-closing{
  text-align: center;
  margin-top: 50px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.proyectos-closing p{
  color: var(--gris-suave);
  font-size: 1.05rem;
  margin-bottom: 24px;
}

/* ---------- Beneficios ---------- */
.benefits-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 36px;
}
.benefits-grid li{
  background: var(--bg-claro);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
}
.benefits-grid span{ font-size: 1.8rem; display: block; margin-bottom: 10px; }
.benefits-grid p{ margin: 0; font-weight: 600; font-size: .92rem; }

/* ---------- Confianza ---------- */
.confianza-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
.confianza-media img{
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.check-list{ margin-top: 20px; display: grid; gap: 12px; }
.check-list li{
  padding-left: 30px;
  position: relative;
  font-weight: 600;
}
.check-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradiente-sol);
}
.check-list li::after{
  content: "✓";
  position: absolute;
  left: 3.5px;
  top: 2px;
  color: #fff;
  font-size: .68rem;
  font-weight: 800;
}

/* ---------- Educativo ---------- */
.edu-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 36px;
}
.edu-card{
  background: #fff;
  border: 1px solid rgba(74,74,74,.1);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.edu-card--featured{
  background: var(--gradiente-sol);
  color: #fff;
  border: none;
}
.edu-card--featured h3{ color: #fff; }
.edu-card--featured p{ color: rgba(255,255,255,.95); }
.edu-card p{ color: var(--gris-suave); margin-bottom: 0; }

/* ---------- FAQ ---------- */
.accordion{ margin-top: 30px; display: grid; gap: 12px; }
.accordion-item{
  background: var(--bg-claro);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.accordion-trigger{
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 20px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  color: var(--gris);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}
.accordion-icon{
  flex-shrink: 0;
  font-size: 1.3rem;
  color: var(--naranja);
  transition: transform .2s ease;
}
.accordion-trigger[aria-expanded="true"] .accordion-icon{ transform: rotate(45deg); }

.accordion-panel{
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
}
.accordion-panel p{
  padding: 0 20px 18px;
  color: var(--gris-suave);
  margin: 0;
}

/* ---------- CTA final ---------- */
.cta-final{
  background: var(--gradiente-sol);
  color: #fff;
  padding: 80px 0;
}
.cta-final h2{ color: #fff; }
.cta-final p{ color: rgba(255,255,255,.95); max-width: 560px; margin: 0 auto 28px; }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--gris);
  color: rgba(255,255,255,.85);
  padding: 60px 0 0;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 40px;
}
.footer-logo{ width: 120px; height: auto; margin-bottom: 14px; }
.footer-brand p{ color: rgba(255,255,255,.7); font-size: .92rem; }
.footer-col h4{
  color: #fff;
  font-size: .95rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 14px;
}
.footer-col ul{ display: grid; gap: 10px; }
.footer-col a:hover{ color: var(--amarillo); }
.footer-col li{ font-size: .92rem; color: rgba(255,255,255,.78); }

.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 22px 0 26px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: .8rem;
  color: rgba(255,255,255,.55);
}

/* ---------- WhatsApp flotante ---------- */
.whatsapp-float{
  position: fixed;
  bottom: 22px;
  right: 22px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  z-index: 200;
  transition: transform .2s ease;
}
.whatsapp-float:hover{ transform: scale(1.08); }

/* ---------- Reveal animation ---------- */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: none;
}
/* Defensive: never let content stay invisible */
.reveal[data-split]{ opacity: 1; transform: none; }

/* =========================================================
   Tablet / Desktop
   ========================================================= */
@media (min-width: 640px){
  .problem-grid{ grid-template-columns: repeat(2, 1fr); }
  .cards-grid{ grid-template-columns: repeat(2, 1fr); }
  .steps{ grid-template-columns: repeat(2, 1fr); }
  .benefits-grid{ grid-template-columns: repeat(4, 1fr); }
  .edu-grid{ grid-template-columns: repeat(3, 1fr); }
  .footer-grid{ grid-template-columns: repeat(2, 1fr); }
  .scenario-grid{ grid-template-columns: repeat(2, 1fr); }
  .scenario-card--feature{ grid-column: 1 / -1; }
  .scenario-card--feature .scenario-media,
  .scenario-card--feature .scenario-body{ grid-column: span 1; }
  .scenario-card--feature{ grid-template-columns: 1.1fr 1fr; align-items: stretch; }
  .scenario-card--feature .scenario-media{ aspect-ratio: auto; height: 100%; }
  .scenario-card--feature .scenario-video{ height: 100%; aspect-ratio: auto; }
}

@media (min-width: 900px){
  .main-nav{ display: block; }
  .cards-grid{ grid-template-columns: repeat(3, 1fr); }
  .steps{ grid-template-columns: repeat(4, 1fr); }
  .confianza-grid{ grid-template-columns: 1fr 1fr; }
  .footer-grid{ grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}

@media (max-width: 899px){
  .main-nav{
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid rgba(74,74,74,.1);
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    transition: transform .25s ease;
    z-index: 90;
  }
  .main-nav.is-open{ transform: translateY(0); }
  .main-nav ul{
    flex-direction: column;
    padding: 16px 20px 24px;
    gap: 4px;
  }
  .main-nav a{
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid rgba(74,74,74,.06);
  }
  .header-cta{ display: none; }
  .menu-toggle{ display: flex; }
}

@media (prefers-contrast: more){
  .btn-ghost{ border-color: var(--gris); }
}