video {
    aspect-ratio: 16 / 9;
}
#logo {
    width: 100vw;
    max-width: 425px;
    height: auto;
}

iframe {
    width: 100%;
    height: 100%;
}

.headerText {
    font-size: 3vw;
}

.msgln {
    margin: 0 0 5px 0;
    font-size: 15px;
    line-height: 1.4;
}

.msgln span.left-info {
    color: orangered;
}

.msgln span.chat-time {
    color: #666;
    font-size: 60%;
    vertical-align: super;
}

.msgln b.user-name,
.msgln b.user-name-left {
    font-weight: bold;
    background: #546e7a;
    color: white;
    padding: 2px 4px;
    font-size: 90%;
    border-radius: 4px;
    margin: 0 5px 0 0;
}

.msgln b.user-name-left {
    background: orangered;
}

p {
    margin: 5px 5px 5px 5px;
}
.card {
    min-height: 300px;
    max-height: 706px;
}
.card-header {
    padding: 0.1rem 0.1rem;
    margin-bottom: 0;
    background-color: rgba(0, 0, 0, .03);
    border-bottom: 1 px solid rgba(0, 0, 0, .125);
}
.card-body {
    overflow: auto;
}