html { width: 100%; height: 100%; }
body {
    text-align: center;
    margin: 0;
    padding: 0;
    height: 100%;
    color: #fff;
    font-family: sans-serif;
    background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
    background-size: 400% 400%;
    -webkit-animation: Gradient 15s ease infinite;
    -moz-animation: Gradient 15s ease infinite;
    animation: Gradient 15s ease infinite;
}
.vh { height: 100%; align-items: center; display: flex; }
.vh > div { width: 100%; text-align: center; vertical-align: middle; }
img { max-width: 100%; }
.wrap { text-align: center; }
.wrap h1 { font-size: 30px; font-weight: 700; margin: 0 0 90px; }
.wrap h2 { font-size: 24px; font-weight: 400; line-height: 1.6; margin: 0 0 80px; }

@-webkit-keyframes Gradient {
    0% { background-position: 0% 50% }
    50% { background-position: 100% 50% }
    100% { background-position: 0% 50% }
}
@-moz-keyframes Gradient {
    0% { background-position: 0% 50% }
    50% { background-position: 100% 50% }
    100% { background-position: 0% 50% }
}
@keyframes Gradient {
    0% { background-position: 0% 50% }
    50% { background-position: 100% 50% }
    100% { background-position: 0% 50% }
}