button.zeta {
    margin: 0;
    position: absolute;
    top: 45%;
    -ms-transform: translateY(45%);
    transform: translateY(-45%);
    left: 75%;
    -ms-transform: translateX(75%);
    transform: translateX(-75%);
    width: 30%;
    height: 5%;
    border: none;
    background-color: inherit;
    cursor: pointer;
    display: inline-block;
    text-align: center;
    color: white;
}

button.epsilon {
    margin: 0;
    position: absolute;
    top: 45%;
    -ms-transform: translateY(45%);
    transform: translateY(-45%);
    left: 25%;
    -ms-transform: translateX(25%);
    transform: translateX(-25%);
    width: 30%;
    height: 5%;
    border: none;
    background-color: inherit;
    cursor: pointer;
    display: inline-block;
    text-align: center;
    color: white;
}

button.kappa {
    margin: 0;
    position: absolute;
    top: 55%;
    -ms-transform: translateY(55%);
    transform: translateY(-55%);
    left: 50%;
    -ms-transform: translateX(50%);
    transform: translateX(-50%);
    width: 30%;
    height: 5%;
    border: none;
    background-color: inherit;
    cursor: pointer;
    display: inline-block;
    text-align: center;
    color: white;
}

button.kappa:hover {
    background-color: white;
    color: black;
    text-align: center;
}

button.epsilon:hover {
    background-color: white;
    color: black;
    text-align: center;
}

button.zeta:hover {
    background-color: white;
    color: black;
    text-align: center;
}

h1 {
    text-align: center;
    color: white;
    margin-top: 10%;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

p {
    text-align: center;
    color: white;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

body {
    background-image: url('https://cdn.pixabay.com/photo/2017/08/30/01/05/milky-way-2695569_960_720.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}