index.css

.content {
    background-color: rgb(58, 184, 121);
    width: 100%;
    height: 100%;
    text-align: center;
    padding-top: 2%;
    padding-bottom: 2%;
    left: -2px;
}

.input-holder {
    align-items: flex-end;
    padding: 0.2%;
}

input {
    width: 80%;
    height: 50px;
    border-style: none;
    box-shadow: 1px 5px 10px rgb(148, 148, 148);
    text-align: center;
    background-color: rgb(32, 32, 32);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: rgb(209, 215, 221);
}

#generate {
    height: 50px;
    width: 30%;
    font-size: large;
    background-color: rgb(32, 32, 32);
    border-style: none;
    box-shadow: 1px 5px 10px rgb(148, 148, 148);
    margin: 2%;
    color: rgb(209, 215, 221);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}