body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: #f4f4f4;
}

header {
    background-color: #4a90e2; /* Azul cálido */
    color: white;
    width: 100%;
    padding: 10px 0;
}

nav {
    display: flex;
    justify-content: center; /* Centrar el menú */
    align-items: center;
    padding: 0 20px;
}

.menu-icon {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

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

li {
    margin: 0 10px;
}

a {
    color: white;
    text-decoration: none;
}

main {
    text-align: center;
}

@media (max-width: 768px) {
    .menu-icon {
        display: block;
    }
    ul {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    ul.show {
        display: flex;
    }
    li {
        margin: 10px 0;
        text-align: center;
    }
}