html, body {
        background: linear-gradient(to right, #020024, #2a5d5d,#0e0f0f);
}

.flex-center {
    height: 100vh;
    display: flex;
    justify-content: center;
    position: relative;
}

.content {
    position: absolute;
    font-family: sans-serif;
    color: #fff;
    text-align: center;
    width:500px;
    background-color:#191919;
    padding-top: 30px;
    top: 50%;
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}

.content:hover { 

    background: #000000;
}

.btn {
    color: #090a0b;
    padding: 0 25px;
    text-decoration: none;
    font-family: sans-serif;
    border: 0;
    background: none;
    display: block;
    margin: 20px auto;
    text-align: center;
    border: 2px solid #2ecc71;
    padding: 14px 40px;
    outline: none;
    color: white;
    border-radius: 24px;
    transition: 0.25s;
    cursor: pointer;
    width:15%;
}

.btn:hover {
    background: #2ecc71
}

.powered{
    font-family: sans-serif;
    font-size: 15px;
    color: #206a5d;
}

@media (max-width: 555px) {
.content{
    width: 90%;
    padding: 5%;
    margin-left: 5%;
    margin-right: 5%;
    }
}