html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}


.ratio-16x9 {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 = 9 / 16 = 0.5625 */
}

    .ratio-16x9 a,
    .ratio-16x9 iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

    .video-thumbnail a {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .video-thumbnail .play-icon {
        width: 45px;
        height: 32px;
        transition: transform 0.2s ease-in-out;
    }

    .video-thumbnail a:hover .play-icon {
        transform: scale(1.2);
    }