*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

.head{
    text-align: center;
    padding-top: 20px;
    color:white;
    font-family : 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-weight: bold;
}
.container-md{
    background-color:rgba(243, 200, 91, .6);
    height: 20rem;
    margin-top: 6rem;
    box-shadow: 4px 4px;
    border-radius: 20px;
}

.main{
    margin-top: 20px;
    line-height: 2;
}
.demo{
    
    font-weight: bold;
}

.row{
    border: 1px solid;
}
#col{
    border: 1px solid;
}
.col-md-8{
    height: 100px;
}
.container-sm{
    margin-top: 20px;
    border: 1px solid;
    background-color: #e67e22;
    visibility: hidden;
    text-align: center;
}

#one{
    background-color: yellow;
    width: 20%;
}