#f13-camera-stream-container {
    width: calc(100% - 2px);
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    position: relative;
    overflow: hidden;
    border: 1px solid #aaa;
    border-top: 0;
}

#f13-camera-stream-frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

ul.f13-cameras-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #aaa;
}

li.f13-camera-tab {
    display: inline-block;
    border-right: 1px solid #aaa;
}

li.f13-camera-tab button {
    display: block;
    padding: 10px 20px;
    background: #222;
    color: var(--orange);
    font-size: 1em;
    border: 0;
    cursor: pointer;
}

li.f13-camera-tab.active button {
    background: #dfdfdf;
    border-bottom: 5px solid #aaa;
    color: #000;
    padding-bottom: 5px;
}

li.f13-camera-tab a {
    display: block;
    padding: 10px 20px;
}

li.f13-camera-tab.active a {
    border-bottom: 5px solid     #aaa;
    padding-bottom: 5px;
    background: #dfdfdf;
    color: #000;
}