.M_button{
    background-color: black;
    color:white;
    border-style: solid;
    transition: opacity 0.2s, border-color 0.2s, background-color 0.2s, color 0.2s;
    opacity: 90%;
    margin-bottom: 5px;
    border-radius: 2px;
    width: 100%;
}
.M_button:hover{
    opacity: 100%;
    border-color: white;
}
.M_button:active{
    border-color: black;
    background-color: white;
    color: black;
}