.buttons {
    position: absolute;
    left: 3%;
    height: 15%;
    width: 15%;
    border: 8px solid;
    border-radius: 20px;
    background-color: white;
    border-color: rgb(175, 114, 0);
    color: orange;
    font-size: 4vw;
    display: flex;
    cursor: pointer;
    justify-content: center; 
    align-items: center; 
}

#button_mix {
    top: 15%;
}

#button_input {
    top: 35%
}

#button_solve {
    top: 55%;
}