html,
body {
    background-color: #1a1a1a;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap-reverse;
}

body {
    overflow: hidden;
}

.div_viewer {
    position: relative;
    border: solid;
    border-color: black;
    background-color: #000;
}

.hearing {
    border-color: red;
}

.player,
.iframe,
iframe {
    float: left;
    z-index: 0;
}

.iframe,
iframe {
    width: 100%;
    height: 100%;
    background: #000;
}

#control_panel {
    position: absolute;
    border-radius: 5px;
    z-index: 100;
    width: 320px;
    height: 100px;
    /* height: 60px; */
    background-color: #000;
    opacity: 0.4;
    /* cursor: move; */
}

#control_panel:hover {
    opacity: 0.9;
}

.playbtn {
    position: absolute;
    top: 52px;
    /* top: 12px; */
    left: 145px;
    border: 0;
    background: transparent;
    box-sizing: border-box;
    width: 0;
    height: 30px;
    border-color: transparent transparent transparent #202020;
    transition: 100ms all ease;
    cursor: pointer;
    border-style: solid;
    border-width: 15px 0 15px 30px;
}

.playbtn.paused {
    border-style: double;
    border-width: 0px 0 0px 30px;
}

.playbtn:hover {
    border-color: transparent transparent transparent #404040;
}

.resetSyncbtn {
    position: absolute;
    top: 43px;
    /* top: 3px; */
    left: 3px;
    background: transparent;
    color: #202020;
    font-size: 1.3rem;
    border: none;
    height: 30px;
    cursor: pointer;
}

.resetSyncbtn:hover {
    color: #e44d7a;
}

.soundbtn {
    position: absolute;
    top: 3px;
    /* left: 3px; */
    background: transparent;
    color: #202020;
    font-size: 1.3rem;
    border: none;
    height: 30px;
    cursor: pointer;
}


.soundbtn:hover {
    color: #574de4;
}

.muteAll {
    position: absolute;
    top: 3px;
    /* left: 3px; */
    right: 10px;
    background: transparent;
    color: #202020;
    font-size: 1.3rem;
    border: none;
    height: 30px;
    cursor: pointer;
}

.muteAll.muted {
    color: #a62828;
}

.muteAll:hover {
    color: #ff0000;
}

.syncbtn {
    position: absolute;
    top: 43px;
    /* top: 3px; */
    left: 29px;
    background: transparent;
    color: #202020;
    font-size: 1.3rem;
    border: none;
    height: 30px;
    cursor: pointer;
}

.syncbtn:hover {
    color: #583df5;
}

.ratiobtn {
    position: absolute;
    top: 43px;
    /* top: 3px; */
    left: 59px;
    background: transparent;
    color: #202020;
    font-size: 1.3rem;
    border: none;
    height: 30px;
    cursor: pointer;
}

.ratiobtn:hover {
    color: #5ec4f6;
}

.panel_range {
    position: absolute;
    top: 100px;
    /* top: 60px; */
    left: -2px;
    width: 100%;
}

.panel_range input {
    width: 100%;
    cursor: ew-resize;
    height: 5px;
}

.panel_time {
    color: #aaa;
    position: absolute;
    top: 75px;
    /* top: 35px; */
    left: 5px;
    height: 10px;
    font-size: 0.8rem;
}

.autoVolume {
    position: absolute;
    top: 43px;
    /* top: 3px; */
    right: 0px;
    background: transparent;
    color: #202020;
    font-size: 1rem;
    border: none;
    height: 30px;
    cursor: pointer;
}

#autoVolumeSec {
    position: absolute;
    top: 68px;
    /* top: 28px; */
    right: 2px;
    width: 40px;
    text-align: center;
    border-radius: 5px;
    background-color: #444;
    color: #fff;
}

.autoVolume:hover {
    color: #404040;
}

.autoVolume.auto {
    color: green;
}