.txt_video{ 
    text-align: right;
}
.img_col{
    text-align:right;
}
.hr_col{
    width: 50%;
    height:5px;
    background:black;  
}
.input_col{
    text-align: center;
}
.number_fraction{
    font-size: 25px;
}
.equal_fraction,.equal_answer{
    font-size:50px;
    margin-top: 3%;
}
.input_fraction
{
    margin-top: 6%;
    text-align: left;
}
.mobile_fraction
{
    display: none;
}
.table{
    border-collapse:collapse;text-align:center;
}
@media (max-width : 700px) {
    
    body{        
        margin: 0px;
    }
    .img_col{
        text-align:center;            
    }            
    .hr_row{
        display: none;
    }
    .correction_card{        
        border-bottom: 4px solid lightgray;                       
    }
    .fraction_card{
        text-align: center;
    }
    .button{        
        height: 50px;
        width: 40%;
    }
    .titre_page{        
        display: none;
    }
    .tuto_button{ 
        padding: 5px;       
        height: 50px;
        width: 100%;        
    }         
    .responsive_img{
        max-width: 100%;
        max-height: 10%;
    }
    .correction_img{
        text-align: right;
    }
    .talk-bubble{
        width: 200px;
    }
    video{
        margin: 0;
        width: 250px;
    }
    .txt_video{
        max-width: 100%;
        text-align: center;        
    }
    .input_fraction
    {        
        text-align: center;
    }    
    .table{
        width: 200px;
        max-width: 100%;        
    }
    .mobile_fraction{
        display: block;
    }
    .desktop_fraction{
        display: none;
    
    }    
}