body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: url('solar.jpg') no-repeat center center fixed;
    background-size: cover;
}

/* HEADER */
header {
    background: rgba(0, 51, 102, 0.85);
    padding: 20px;
    color: white;
    text-align: center;
}

/* MENU */
nav {
    background: rgba(0, 85, 165, 0.85);
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-size: 18px;
    font-weight: bold;
}

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

/* CONTENT BOX */
.content {
    padding: 40px;
    max-width: 800px;
    margin: auto;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 10px;
}

/* TITLES */
h2 {
    color: #003366;
}

/* FOOTER */
footer {
    background: rgba(0, 51, 102, 0.85);
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
}