html,
body {
    height: 100%;
}

body {
    margin: 0;
}

#loading-section {
    margin: 0;
    position: absolute;
    top: 50%;
    -ms-transform: translateY(-50%);
    transform: translate(-50%, -50%);
    left: 50%;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
}

#logo {
    animation: rotation 4s infinite linear;
    width: 100px;
    height: 100px;
}

@keyframes rotation {
    100%{ transform:rotatey(360deg); }
  }