body {
    margin: 0;
    font-family: Arial;
}

/* MENU */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #002b5b;
    color: white;
    padding: 15px 30px;
}

.logo {
    font-weight: bold;
    font-size: 20px;
}

nav a {
    color: white;
    margin: 0 10px;
    text-decoration: none;
}

.btn {
    background: orange;
    padding: 10px 15px;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

/* PORTADA */
.hero {
    height: 450px;
    background: url('../img/docentes.jpg') center/cover;
    position: relative;
}

.overlay {
    background: rgba(0,0,0,0.5);
    height: 100%;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

/* CARRERAS */
.carreras {
    text-align: center;
    padding: 40px;
}

.contenedor {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    background: #eee;
    padding: 20px;
    margin: 10px;
    width: 200px;
    border-radius: 10px;
}