body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: url('assets/background.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #2f2e2c;
}
header {
    text-align: center;
    margin-top: 20px;
}
header img {
    width: 80%;
    max-width: 900px;
}
nav {
    text-align: center;
    background-color: rgba(245, 245, 245, 0.9);
    padding: 10px;
    font-size: 18px;
}
nav a {
    margin: 0 15px;
    text-decoration: none;
    color: #3b2f2f;
    font-weight: bold;
}
main {
    max-width: 960px;
    margin: 20px auto;
    background-color: rgba(255, 255, 255, 0.92);
    padding: 20px;
    border-radius: 8px;
}