body {
    background-color: #1a1a1a;
    color: #fff;
}
.card {
    background-color: #2a2a2a;
    border: 1px solid #3a3a3a;
    color: #fff;
}
.btn {
    transition: all .2s ease-in-out;
}
.btn-success:hover {
    background-color: #37a241;
}

.btn-danger:hover {
    background-color: #af1717;
}
.video-preview {
    width: 100%;
    max-height: 300px;
    background-color: #000;
    border: 1px solid #2a2a2a;
    object-fit: cover;
}