/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

/* Cabecera con imagen */
#header {
    background: url('banner.jpg') no-repeat center center;
    background-size: cover;
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 42px;
    font-weight: bold;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.7);
}

/* Menú */
#menu {
    background-color: #222;
    padding: 12px;
    text-align: center;
}
#menu a {
    color: #fff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    transition: color 0.3s;
}
#menu a:hover {
    color: #FFD700;
}

/* Contenido */
#content {
    padding: 20px;
    text-align: center;
}

/* Footer */
#footer {
    background-color: #222;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 30px;
}