.advert {
    display: none;
}

audio {
    width: 262px;
    height: 54px;
    padding: 6px;
    background: #2f2e2d;
}

.panel-heading text{
  background-color:#686b6d;
  border-color:#686b6d;
}

.panel-body {
background:#686b6d;
color:white;
}
element.style {
}
body {
    color: #efefeff0;
}
img {
    border-style: none;
}
<div class="navigation-logo"><img src="https://i.ibb.co/TrdPfY8/2.png" alt="rust"></div>