:root {
    --bg: #f9f9f9;
    --text: #333;
    --muted: #555;
    --primary: #079992;
    --accent: #0a3d62;
    --highlight: #feca57;
    --card-bg: #fff;
    --border: rgba(0,0,0,0.08);
    --shadow: 0 5px 20px rgba(0,0,0,0.08);
  }
  
  *{box-sizing:border-box}
  html,body{margin:0;padding:0}
  body {
    font-family: 'Montserrat', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
  }
  
  /* NAV */
  .nav {
    position: sticky;
    top: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    z-index: 50;
  }
  .nav__wrap {
    max-width: 1200px;
    margin: auto;
    padding: .8rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .brand { color: var(--accent); font-weight: 800; text-decoration: none; }
  .nav__links a {
    color: var(--muted);
    margin-left: 1rem;
    text-decoration: none;
    font-weight: 600;
  }
  .nav__links a:hover { color: var(--primary); }
  
  /* HERO */
  .hero {
    background: #fff;
    color: #000000;
    min-height: 80vh;
    display: flex;
    align-items: center;
    text-align: center;
    justify-content: center;
    padding: 3rem 1rem;
  }
  .hero__content .logo {
    max-width: 400px;   /* ajusta el tamaño */
    margin-bottom: 1.5rem;
    animation: fadeIn 1.2s ease;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
  }
  
  .hero__content h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
  }
  .hero__content p { font-size: 1.2rem; margin-bottom: 2rem; }
  .btn {
    display: inline-block;
    padding: 0.9rem 1.5rem;
    background: var(--highlight);
    color: var(--text);
    font-weight: bold;
    border-radius: 999px;
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
  }
  .btn:hover { transform: scale(1.05); }
  .btn-outline {
    border: 2px solid var(--accent);
    background: transparent;
    color: var(--accent);
  }
  .btn-outline:hover {
    background: var(--accent);
    color: #fff;
  }
  
  /* SECCIONES */
  .section {
    padding: 4rem 1.5rem;
    max-width: 1200px;
    margin: auto;
  }
  .section h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--accent);
  }
  .lead { color: var(--muted); text-align: center; }
  .solution {
    padding: 4rem 1.5rem;
    background: #fff;
  }
  .solution.alt {
    background: #f3f6f9;
  }
  .two-col {
    display: grid;
    gap: 2rem;
    align-items: center;
  }
  @media (min-width: 900px) {
    .two-col { grid-template-columns: 1fr 1fr; }
  }
  .solution h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.8rem;
  }
  .solution p {
    color: var(--muted);
    font-size: 1.1rem;
  }
  .solution-img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow);
  }
  
  .sobre-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2.5rem;
  }
  @media(min-width: 768px){
    .sobre-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media(min-width: 1100px){
    .sobre-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }
  .sobre-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .sobre-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  }
  .sobre-item h3 {
    color: var(--primary);
    margin-bottom: 1rem;
  }
  .sobre-item p {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.5;
  }
  
  /* Reto Energético */
  .section-accent {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    margin: 2rem auto;
  }
  .two-col {
    display: grid;
    gap: 2rem;
    padding: 2rem;
  }
  @media(min-width: 900px){
    .two-col { grid-template-columns: 1fr 1fr; align-items: center; }
  }
  .quote {
    background: #fdfdfd;
    border-left: 5px solid var(--primary);
    padding: 1.5rem;
    border-radius: 10px;
    color: var(--muted);
    font-style: italic;
  }
  
  /* GRID SOLUCIONES */
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
    gap: 2rem;
    margin-top: 2rem;
  }
  .card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  }
  .card h3 { color: var(--primary); }
  
  /* FOOTER */
  .footer {
    background: var(--accent);
    color: #fff;
    padding: 3rem 1.5rem;
  }
  .footer__wrap {
    display: grid;
    gap: 2rem;
    max-width: 1200px;
    margin: auto;
  }
  @media(min-width:900px){
    .footer__wrap { grid-template-columns: 1.2fr 1fr 1fr; }
  }
  .footer__brand h3 { margin: 0; }
  .footer__contact ul { list-style: none; padding: 0; margin: 0; }
  .footer__contact a, .footer__social a { color: #fff; text-decoration: none; }
  .footer__contact a:hover, .footer__social a:hover { text-decoration: underline; }
  .footer__bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,.2);
    margin-top: 2rem;
    padding-top: 1rem;
    color: #eee;
  }
  
  /* WhatsApp flotante */
  .whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25d366;
    color: white;
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: transform 0.3s;
  }
  .whatsapp-float:hover { transform: scale(1.1); }
  
  /* Animaciones reveal */
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .8s ease, transform .8s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
  .delay-1 { transition-delay: .15s; }
  .delay-2 { transition-delay: .3s; }
  .delay-3 { transition-delay: .45s; }
  .delay-4 { transition-delay: .6s; }
  
  .soluciones-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
    grid-template-columns: 1fr;
    text-align: center;
  }
  @media(min-width: 640px){
    .soluciones-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media(min-width: 900px){
    .soluciones-grid { grid-template-columns: repeat(3, 1fr); }
  }
  @media(min-width: 1200px){
    .soluciones-grid { grid-template-columns: repeat(5, 1fr); }
  }
  
  .solucion-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .solucion-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
  }
  
  .solucion-item h3 {
    color: var(--primary);
    margin-bottom: 1rem;
  }
  
  .solucion-img {
    width: 100%;
    max-width: 180px;
    margin: 0 auto 1rem;
    display: block;
    border-radius: 10px;
    box-shadow: var(--shadow);
    object-fit: cover;
  }
  
  .solucion-item p {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.5;
  }