html, body {
    height: 100%;
    margin: 0;
}

#mounting-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-flow: column;
    height: 100%;
    width: 100%;
    background: #FFF;
}

#mounting-preview h1 {
    font-family: "Open Sans";
    font-weight: normal;
    font-size: 1.2em;
    margin: 0;
    color: #03A9F4;
}

#mounting-spinner {
    border: 8px solid #333333;
    border-top: 8px solid #03A9F4;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
    margin: 0 auto;
    margin-top: 30px;
    display: table-cell;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}