body {
    margin: 0;
    padding: 0;
    background-image: url("https://les.wroclaw.pl/2355-large_default/obrus-na-piknik-zante-w-bialo-czerwona-kratke-fala.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    font-family:Arial;
}
.okienko {
    width: 450px;
    margin: 60px auto;
    text-align: center;
    background-color: rgb(191, 10, 10);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}
#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #554e4e;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
#main-nav .logo {
    height: 40px;
    width: auto;
    
}
#main-nav .nav-links {
    list-style: none;
    display: flex;
    gap: 10px;
}
#main-nav .nav-links li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}
#main-nav .nav-links li a:hover {
    color: #a27f4f;
}