/* Configuración general */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    color: #333;
    background-color: #f4f4f9;
}

header {
    background: #2c3e50;
    color: #ffffff;
    padding: 1rem 0;
    text-align: center;
}

nav ul {
    padding: 0;
    list-style: none;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

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

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 1rem;
}

button:hover {
    background-color: #2980b9;
}

footer {
    text-align: center;
    padding: 20px;
    font-size: 0.8rem;
    color: #777;
}