:root {
    --azul-marino: #1a2b48;
    --gris-grafito: #4a4a4a;
    --blanco: #ffffff;
    --plata: #f4f4f4;
    --rojo-promo: #d32f2f;
}

body { 
    font-family: 'Montserrat', sans-serif; 
    margin: 0; 
    line-height: 1.6; 
    color: var(--gris-grafito); 
    scroll-behavior: smooth; 
}

.container { 
    width: 90%; 
    max-width: 1100px; 
    margin: auto; 
}

.section-padding { 
    padding: 80px 0; 
}

.bg-light { 
    background-color: var(--plata); 
}

/* HEADER */
header { 
    background: var(--blanco); 
    padding: 10px 0; 
    border-bottom: 3px solid var(--azul-marino); 
    position: sticky; 
    top: 0; 
    z-index: 1000; 
}

header .container { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo img { 
    height: 120px; 
    width: auto; 
    transition: 0.3s; 
}

header ul { 
    margin: 0; 
    padding: 0; 
    display: flex; 
    list-style: none; 
}

header li { 
    margin-left: 20px; 
}

header a { 
    text-decoration: none; 
    color: var(--azul-marino); 
    font-weight: bold; 
    font-size: 0.9rem; 
}

header a:hover { 
    color: var(--rojo-promo); 
}

/* HERO */
.hero { 
    background: var(--azul-marino); 
    color: white; 
    padding: 120px 0; 
    text-align: center; 
}

.hero h1 { 
    font-size: 3.5rem; 
    margin: 0; 
}

.btn { 
    background: white; 
    color: var(--azul-marino); 
    padding: 15px 30px; 
    text-decoration: none; 
    border-radius: 5px; 
    font-weight: bold; 
    display: inline-block; 
    margin-top: 25px; 
    transition: 0.3s; 
}

.btn:hover { 
    background: var(--plata); 
    transform: translateY(-3px); 
}

/* FLEXBOX LAYOUTS */
.flex-container { 
    display: flex; 
    align-items: center; 
    gap: 40px; 
    flex-wrap: wrap; 
}

.flex-container.reverse { 
    flex-wrap: wrap-reverse; 
}

.flex-text, .flex-img { 
    flex: 1; 
    min-width: 300px; 
}

.img-responsive { 
    width: 100%; 
    height: auto; 
    border-radius: 10px; 
    box-shadow: 0 10px 20px rgba(0,0,0,0.1); 
}

/* CLIENTES */
.clientes-section { 
    background: #eee; 
    padding: 60px 0; 
    text-align: center; 
}

.clientes-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); 
    gap: 15px; 
    margin-top: 30px; 
}

.cliente-item { 
    background: white; 
    padding: 15px; 
    border-radius: 5px; 
    font-weight: bold; 
    font-size: 0.85rem; 
    box-shadow: 0 2px 5px rgba(0,0,0,0.05); 
    color: var(--azul-marino); 
}

/* PROMOPACK */
.promo-landing { 
    text-align: center; 
    background: #fff; 
}

.badge { 
    background: var(--rojo-promo); 
    color: white; 
    padding: 5px 15px; 
    border-radius: 20px; 
    font-size: 0.8rem; 
    font-weight: bold; 
}

.promo-info ul { 
    text-align: left; 
    max-width: 500px; 
    margin: 30px auto; 
}

/* SECCIÓN DE CONTACTO (CORREGIDA) */
.contact-section { 
    padding: 100px 0; 
    min-height: 85vh; /* Asegura espacio suficiente para el scroll al final */
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-form { 
    max-width: 600px; 
    margin: 30px auto; 
    display: flex; 
    flex-direction: column; 
    gap: 15px; 
}

input, select, textarea { 
    padding: 15px; 
    border: 1px solid #ddd; 
    border-radius: 5px; 
    font-family: inherit; 
    font-size: 1rem; 
    width: 100%;
    box-sizing: border-box;
}

input:focus, select:focus, textarea:focus { 
    outline: 2px solid var(--azul-marino); 
}

.btn-submit { 
    background: var(--azul-marino); 
    color: white; 
    border: none; 
    padding: 18px; 
    cursor: pointer; 
    font-weight: bold; 
    border-radius: 5px; 
    font-size: 1.1rem; 
    transition: 0.3s;
}

.btn-submit:hover { 
    background: #0d1624; 
}

/* WHATSAPP */
.whatsapp-btn { 
    position: fixed; 
    bottom: 20px; 
    right: 20px; 
    background: #25d366; 
    color: white; 
    padding: 12px 25px; 
    border-radius: 50px; 
    display: flex; 
    align-items: center; 
    text-decoration: none; 
    z-index: 1000; 
    box-shadow: 0 5px 15px rgba(0,0,0,0.2); 
}

.whatsapp-btn img { 
    width: 25px; 
    margin-right: 10px; 
}

footer { 
    background: #111; 
    color: white; 
    text-align: center; 
    padding: 40px 0; 
    font-size: 0.9rem; 
}

/* ANCLAJE DE SCROLL (CORREGIDO) */
section[id] {
    scroll-margin-top: 160px; /* Margen para no tapar títulos con el menú fijo */
}

/* MOBILE */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    header .container { flex-direction: column; }
    header ul { margin-top: 15px