* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background: #f4f6f8;
    color: #222;
}

.contenedor {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* HEADER */

.header {
    background: #0d47a1;
    padding: 15px 0;
}

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

.logo {
    height: 50px;
}

nav a {
    color: #fff;
    margin-left: 25px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

/* BANNER */

.banner {
    height: 420px;
    background: url("../img/banner.jpg") center/cover no-repeat;
    position: relative;
}

.banner-overlay {
    background: rgba(0,0,0,.55);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.banner h1 {
    font-size: 42px;
}

.banner p {
    font-size: 20px;
    margin-top: 10px;
}

/* SERVICIOS */

.servicios {
    padding: 60px 0;
}

.servicios h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 32px;
}

.grid-servicios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.servicio {
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 5px 18px rgba(0,0,0,.1);
    transition: transform .3s;
}

.servicio:hover {
    transform: translateY(-8px);
}

.servicio img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 10px;
    margin: 15px 0;
}

.servicio i {
    font-size: 45px;
    color: #1976d2;
}

.servicio h3 {
    margin: 10px 0;
}

/* FOOTER */

footer {
    background: #0d47a1;
    color: white;
    text-align: center;
    padding: 25px;
}

footer i {
    font-size: 22px;
    margin: 10px;
    cursor: pointer;
}

footer i:hover {
    color: #90caf9;
}

/* RESPONSIVE */

@media (max-width: 768px) {
    nav {
        display: none;
    }

    .banner h1 {
        font-size: 28px;
    }
}