body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f6f9;
    color: #333;
}

header {
    background-color: #0a1f44;
    color: white;
    text-align: center;
    padding: 30px 20px;
}

nav {
    background-color: #1d3c78;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 10px;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

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

section {
    padding: 40px;
    margin: 20px auto;
    max-width: 900px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

button {
    padding: 10px 20px;
    background-color: #1d3c78;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #0a1f44;
}

.oculto {
    display: none;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #0a1f44;
    color: white;
    margin-top: 20px;
}