html {
    display: table;
    margin: auto;
}

body {
    display: table-cell;
    vertical-align: middle;
    font-family: Arial, Helvetica, sans-serif;
}


video, canvas {
    width: 100%;
    max-height: calc(100% - 8px);
    position: absolute;
    top:0;
    left:0;
}

canvas{
    z-index: 10;
    position: absolute;
    top:0;
    left:0;
    border: 0;
}

label {
    margin-left: 10px;
    cursor: pointer;
}

input[type=checkbox]{
    vertical-align: middle;
    cursor: pointer;
}

#resizable {
    position: relative;
    width: 900px;
    height: 500px;
    border: 1px solid black;
    resize:both;
    overflow:auto; /* something other than visible */
    padding:10px !important;
    margin-inline: auto;
}

.hidden{
    display: none !important;
}

.hide_until_load {
    vertical-align: middle;
    text-align: center;
    padding-top: 20px;
}

.slider_wrapper{
    position: relative;
    margin-bottom: 10px;
}

.slider_time_pos{
    position: absolute;
    width: 4px;
    background: red;
    height: 100%;
    top: 0;
    left: 20%;
    z-index: 12;
    cursor: pointer;
}

.play_toggle {
    width: 40px;
}

.ffmpeg {
    vertical-align: middle;
    text-align: center;
    font-family: monospace;
    padding: 6px;
    margin-top: 20px;
    border: 1px dashed gray;
    background: black;
    color: white;
    cursor: pointer;
    max-width:900px;
}

.ffmpeg_log {
    font-family: monospace;
    white-space: pre;
    max-height: 100px;
    max-width: 900px;
    overflow-y: auto;
}

.download_links a{
    display: block;
}