h1 {
    color: blueviolet;
}
body {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background-color:#000;
};

button {
    margin: 20px;
}

button:focus { outline:none }

#cont1, #cont2, #cont3  {
    display: flex;
    flex-direction: column;
    padding-bottom: 50px;
    height: 850px;
    justify-content: space-evenly;
    align-items: center;
}

.control-button {
    width: 150px;
    height: 100px;
    background: black;
    border: none;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: x-large;
    margin-top: 25px;
}


.heading-txt{
    color: pink;
    font-size: xx-large;
}

h3, p{
  color: white;
}