body 
{
    background-color: grey;
    padding: 0px;
    margin: 0px;
}

.all_buttons 
{ 
    display: flex;
    justify-content: center;
}
.button1 
{
    border-radius: 5%;
    padding: 10px;
    font-size: 15px;
    background-color: darkred;
    color: white;
    cursor: pointer;
    font-family: Helvetica;
    width: 100px;
    margin: 20px;
    opacity: 1;
}
#hover_button 
{
    border-radius: 5%;
    padding: 10px;
    font-size: 14px;
    background-color: teal;
    cursor: pointer;
    font-family: Helvetica;
    width: 100px;
    margin: 20px;
    color: #fff;
}

#hover_button:hover 
{
    background-color: red;
}

