body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    
}

 section .main{
    width: 100;
    height: auto;
    background-color: black;
    
}

.sub-main{
   
    width: 99%;
    height: auto;
}

video{
    width: 100%;
    height: auto;
}

img{
    width: 100%;
}