.navegador_video {
    display: block;
    width: 90%;
    margin: 0 auto;
}
.navegador_video ul {
    overflow: hidden;
    list-style-type: none;
    padding: 0;
    margin:0 auto;
    text-align: center;
    display: table;
}
.navegador_video_3 ul li {
    display: table-cell;
    text-align: center;
    padding: 0 10px;
}
.navegador_video li a {
    display: inline-block;
    padding: 5px 20px;
    color: #fff;
    border-radius: 5px;
    font-weight: bold;
    background-color: var(--accent-color);
    font-family: var(--nav-font);
}
iframe{
    margin: 0 auto;
    display: block;
    margin-top: 30px;
    border: dashed 2px var(--accent-color);
    border-radius: 10px;
}
@media (max-width: 768px){
    iframe{
        width: 480px;
        height: 270px;
    }
}
@media (min-width: 769px) and (max-width: 999px){
    iframe{
        width: 640px;
        height: 360px;
    }
}
@media (min-width: 1000px){
    iframe{
        width: 960px;
        height: 540px;
    }
}
.alerts-border {
    border: 3px var(--naranja-fuerte) solid;
    animation: blink 2s;
    animation-iteration-count: infinite;
}

@keyframes blink { 50% { border-color:#fff ; }  }