* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f5f6f7; /* gris muy claro */
    color: #333;
    line-height: 1.6;
}

/* Encabezado */
header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: #0b3c91; /* azul corporativo del logo */
    color: #fff;
    padding: 15px 0;
    z-index: 1000;
    transition: top 0.3s;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    margin: auto;
}

.logo {
    height: 45px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #bcd2ff;
}

/* Hero */
.hero {
    background: linear-gradient(rgba(11,60,145,0.8), rgba(11,60,145,0.8)), url('img/bg.jpg') center/cover;
    color: white;
    text-align: center;
    padding: 160px 20px 120px;
}

.hero h1 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.1rem;
}

/* Secciones generales */
.section {
    padding: 80px 20px;
}

.section.alt {
    background-color: #e9ebee;
}

.container {
    max-width: 1000px;
    margin: auto;
}

h2 {
    text-align: center;
    color: #0b3c91;
    margin-bottom: 30px;
}

h3 {
    color: #0b3c91;
    margin-bottom: 10px;
}

.columns {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.columns > div {
    flex: 1;
    min-width: 250px;
}

.values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    text-align: center;
}

blockquote {
    margin-top: 25px;
    font-style: italic;
    color: #555;
    text-align: center;
}

/* Footer */
footer {
    background: #0b3c91;
    color: white;
    text-align: center;
    padding: 25px 10px;
}

/* Botón WhatsApp */
.whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 55px;
    height: 55px;
    z-index: 1001;
}

.whatsapp img {
    width: 100%;
    height: 100%;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    .hero h1 {
        font-size: 1.6rem;
    }
}