body, html {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background-color: black;
    color: white;
}
header {
    background-color: darkred; 
    padding: 20px 0;
    text-align: center;
}
nav {
    text-align: center;
    margin-top: 20px;
}
nav ul {
    padding: 0;
    list-style: none;
}

nav ul li {
    display: inline-block;
    margin-right: 20px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s;
}
nav ul li a:hover,
nav ul li a:focus {
    background-color: gray; 
}

@media screen and (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 10px 0;
    }
}

main {
    padding: 20px;
}
section {
    margin-bottom: 20px;
    background-color: darkslateblue; 
    padding: 20px;
    border-radius: 8px; 
}

iframe {
    max-width: 100%;
    border: none; 
}

audio {
    width: 100%; 
    margin-top: 20px; 
}
#fixed-logo {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 80px; 
}
footer {
    background-color: darkred;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}
@media screen and (max-width: 1024px) {
    header, footer {
        padding: 15px 0;
    }
    #fixed-logo {
        width: 60px; 
    }
}

@media screen and (max-width: 768px) {
    body {
        background-color: black; 
    }
    section {
        padding: 15px;
    }
}

@media screen and (max-width: 480px) {
    header h1 {
        font-size: 18px;
    }
    section {
        margin-bottom: 15px;
        padding: 10px;
    }
    #fixed-logo {
        bottom: 10px;
        right: 10px;
        width: 50px;
    }
}