*{
    padding: 0;
    margin: 0;   
}

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

body{
    padding: 10px;
    width: calc(100% - 20px);
    height: calc(100% - 20px);
    min-width: 800px;
    min-height: 640px;
}

.menu-bar{
    width: calc(100% - 2px);
    height: 35px;
    display: flex;
    align-items: center;
}
.menu-bar > div:nth-child(1),
.menu-bar > div:nth-child(2){
    margin-left: 10px;
}
.menu-bar > div:nth-child(3){
    margin-left: auto;
    margin-right: 10px;
}
.mont-box{
    width: calc(100% - 2px);
    height: calc(100% - 38px);
    display: flex;
    flex-direction: column;
    
}

.serve-title{
    height: 19px;
    padding-left: 10px;
    width: calc(100% - 10px);
    line-height: 20px;
    font-weight: bold;
}
.mont-body{
    width:calc(100% - 1px);
    height:calc(100% - 21px);
    display: flex;
    justify-content: center;
    align-items: center;
}
.empty-body{
    width:calc(100% - 1px);
    height:calc(100% - 21px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.section{
    position: relative;
    height: calc(100% - 1px);
}
.video-js .vjs-big-play-button{
    display: none;
}
.ml-5{
    margin-left: 10px;
}

.fr{
    display: flex;
}
.fr > div:nth-child(3){
    width: 140px;
}
.error-label {
    width: 90px;

}
.error-content{
    width: 256px;
}