body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: url('images/CMC.png') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
}
header {
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}
header h1 {
    margin: 0;
}
nav ul {
    list-style: none;
    padding: 0;
}
nav ul li {
    display: inline;
    margin: 0 10px;
}
nav ul li a {
    color: #fff;
    text-decoration: none;
}
main {
    padding: 2rem;
    background: rgba(0, 0, 0, 0.6);
}
section {
    margin-bottom: 2rem;
    padding: 1rem;
    border-radius: 5px;
}
footer {
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}