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

body {
    font-family: Arial, sans-serif;
    color: #333;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 20px;
}

/* HEADER */
.header {
    background: #002b5c;
    color: white;
}

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

.logo {
    height: 50px;
}

nav a {
    color: white;
    margin-left: 15px;
    text-decoration: none;
}

.btn {
    background: #c8102e;
    padding: 8px 15px;
    border-radius: 5px;
}

/* HERO */
.hero {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
                url('../img/fondo.jpg') center/cover;
    color: white;
    text-align: center;
    padding: 100px 20px;
}

/* SECCIONES */
.section {
    margin: 40px 0;
}

/* CARDS */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.card {
    background: #f4f4f4;
    padding: 20px;
    border-radius: 8px;
}

/* FOOTER */
footer {
    background: #002b5c;
    color: white;
    text-align: center;
    padding: 20px;
}

/* MOBILE */
.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

@media (max-width: 768px) {

    nav {
        display: none;
        flex-direction: column;
        background: #002b5c;
        position: absolute;
        top: 60px;
        right: 0;
        width: 200px;
    }

    nav.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }
}