/* Variables Hotsun - Clean, Elegant & Professional Baj¨ªo */
:root {
    --primary: #C12026; 
    --primary-hover: #A01A1F;
    --dark-text: #1A1A1A; 
    --gray-text: #555555; 
    --white: #FFFFFF;
    --off-white: #F9F9FB; 
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Montserrat', sans-serif; }
body { color: var(--gray-text); background: var(--white); line-height: 1.8; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }

/* Navegaci¨®n */
header {
    background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(10px);
    position: fixed; width: 100%; top: 0; z-index: 100;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    transition: all 0.3s ease;
}
.header-content { display: flex; justify-content: space-between; align-items: center; height: 90px; }
.logo-img { height: 75px; width: auto; transition: transform 0.3s; }
.logo-img:hover { transform: scale(1.05); }

.nav-links { list-style: none; display: flex; gap: 2.5rem; align-items: center; }
.nav-links a { text-decoration: none; color: var(--dark-text); font-weight: 600; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 1px; transition: color 0.3s; }
.nav-links a:hover { color: var(--primary); }

/* Botones */
.btn-primary, .btn-outline {
    padding: 14px 32px; border-radius: 4px; font-weight: 700; text-decoration: none; 
    transition: all 0.3s; display: inline-block; text-transform: uppercase; letter-spacing: 1px; cursor: pointer; border: none; font-size: 0.95rem;
}
.btn-primary { background: var(--primary); color: var(--white) !important; border: 2px solid var(--primary); box-shadow: 0 10px 20px rgba(193, 32, 38, 0.2); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-3px); box-shadow: 0 15px 25px rgba(193, 32, 38, 0.3); }
.btn-primary.large { padding: 18px 36px; font-size: 1.1rem; margin-top: 2.5rem; }

.btn-outline { background: transparent; color: var(--dark-text) !important; border: 2px solid var(--dark-text); }
.btn-outline:hover { background: var(--dark-text); color: var(--white) !important; transform: translateY(-3px); }

/* Hero Section */
.hero-section {
    height: 100vh;
    background: url('https://images.unsplash.com/photo-1509391366360-2e959784a276?q=80&w=2072&auto=format&fit=crop') center/cover;
    position: relative; display: flex; align-items: center;
}
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(90deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.4) 100%); }
.hero-text { position: relative; z-index: 1; max-width: 700px; color: var(--dark-text); }
.hero-text h1 { font-size: 4rem; line-height: 1.1; margin-bottom: 1.5rem; font-weight: 800; color: var(--dark-text); }
.hero-text h1 span { color: var(--primary); }
.hero-text p { font-size: 1.25rem; margin-bottom: 2rem; color: var(--gray-text); font-weight: 500;}

/* Secciones Generales */
.info-section, .sinergia-section { padding: 120px 0; background: var(--white); }
.info-grid, .sinergia-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.info-text h2, .sinergia-content h2 { color: var(--dark-text); font-size: 2.8rem; margin-bottom: 1.5rem; line-height: 1.2; font-weight: 700; }
.red-text { color: var(--primary); font-size: 1rem; text-transform: uppercase; font-weight: 700; letter-spacing: 2px; margin-bottom: 10px; display: block; }
.info-text p, .sinergia-content p { font-size: 1.1rem; margin-bottom: 1.2rem; }

/* Calculadora Ingenier¨ªa */
.simulador-section { padding: 100px 0; background: var(--off-white); }
.simulador-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.simulador-card { background: var(--white); padding: 40px; border-radius: 12px; border-top: 6px solid var(--primary); }
.simulador-card h3 { color: var(--dark-text); margin-bottom: 20px; font-size: 1.5rem; text-align: center; }
.input-group { display: flex; flex-direction: column; gap: 10px; }
.input-group label { font-weight: 600; color: var(--gray-text); font-size: 0.95rem; }
.input-group input { padding: 15px; border: 2px solid #E0E0E0; border-radius: 6px; font-size: 1.1rem; transition: border 0.3s; }
.input-group input:focus { border-color: var(--primary); outline: none; }
.resultado-oculto { display: none; margin-top: 25px; padding-top: 20px; border-top: 1px solid #E0E0E0; text-align: center; animation: fadeIn 0.5s ease; }
.resultado-oculto.activo { display: block; }
.cifra-roja { color: var(--primary); font-size: 3rem; font-weight: 800; margin: 10px 0; }
.desc-paneles-text { font-size: 0.95rem; color: #666; padding: 0 10px; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* Galer¨ªa */
.gallery-section { padding: 100px 0; background: var(--white); }
.section-title { text-align: center; margin-bottom: 4rem; }
.section-title h2 { font-size: 2.5rem; color: var(--dark-text); font-weight: 700; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.gallery-img { width: 100%; height: 350px; object-fit: cover; border-radius: 12px; transition: all 0.4s ease; cursor: pointer; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.gallery-img:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.12); }

/* Sinergia B-AIR */
.lista-beneficios { list-style: none; margin: 2rem 0; }
.lista-beneficios li { margin-bottom: 1.2rem; font-size: 1.1rem; border-bottom: 1px solid rgba(0,0,0,0.05); padding-bottom: 10px; color: var(--dark-text); }
.lista-beneficios span { color: var(--primary); font-weight: bold; margin-right: 10px; }
.sinergia-img-container { position: relative; }
.badge-garantia { position: absolute; bottom: -30px; right: -30px; width: 150px; background: var(--white); padding: 10px; border-radius: 50%; box-shadow: 0 15px 35px rgba(0,0,0,0.1); border: 1px solid rgba(0,0,0,0.05); }

/* FAQ Section */
.faq-section { padding: 100px 0; background: var(--off-white); }
.faq-accordion { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 15px; margin-top: 3rem; }
.faq-item { background: var(--white); border: 1px solid rgba(0,0,0,0.04); border-radius: 8px; overflow: hidden; transition: all 0.3s ease; box-shadow: 0 4px 15px rgba(0,0,0,0.02);}
.faq-item:hover { box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.faq-question { width: 100%; text-align: left; padding: 20px 25px; background: none; border: none; font-size: 1.15rem; font-weight: 600; color: var(--dark-text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: color 0.3s; }
.faq-question:hover { color: var(--primary); }
.faq-icon { font-size: 1.5rem; color: var(--primary); font-weight: 300; transition: transform 0.4s ease; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; background: var(--white); }
.faq-answer p { padding: 0 25px 20px 25px; color: var(--gray-text); margin: 0; }
.faq-item.active { border-color: rgba(193, 32, 38, 0.2); }
.faq-item.active .faq-icon { transform: rotate(45deg); }

/* Utiler¨ªas */
.img-responsive { width: 100%; height: auto; display: block; object-fit: cover; }
.shadow-elegant { border-radius: 16px; box-shadow: 0 20px 50px rgba(0,0,0,0.08); }
.border-red { border-left: 8px solid var(--primary); }

/* WhatsApp Flotante */
.whatsapp-float {
    position: fixed; width: 60px; height: 60px; bottom: 30px; right: 30px; background-color: #25d366; color: #FFF;
    border-radius: 50px; text-align: center; font-size: 30px; box-shadow: 0px 4px 15px rgba(0,0,0,0.2);
    z-index: 1000; transition: transform 0.3s; display: flex; justify-content: center; align-items: center;
}
.whatsapp-float:hover { transform: scale(1.1); box-shadow: 0px 6px 20px rgba(0,0,0,0.3); }
.wa-icon { width: 35px; height: 35px; }

/* Footer */
.footer { background: #111111; color: var(--white); text-align: center; padding: 4rem 0; }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.logo-footer { height: 70px; filter: brightness(0) invert(1); opacity: 0.9; }

/* Responsividad */
@media (max-width: 900px) {
    .info-grid, .sinergia-grid, .gallery-grid, .simulador-grid { grid-template-columns: 1fr; gap: 3rem; }
    .hero-text h1 { font-size: 2.8rem; }
    .hero-overlay { background: rgba(255,255,255,0.85); }
    .gallery-img { height: 250px; }
    .nav-links { display: none; }
    .badge-garantia { width: 120px; bottom: -15px; right: 10px; }
    .whatsapp-float { bottom: 20px; right: 20px; width: 55px; height: 55px; }
}