html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

#cover-spin {
    position: fixed;
    width: 100%;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-color: rgba(255,255,255,0.7);
    z-index: 9999;
    display: none;
}

@@-webkit-keyframes spin {
    from {
        -webkit-transform: rotate(0deg);
    }

    to {
        -webkit-transform: rotate(360deg);
    }
}

@@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

#cover-spin::after {
    content: '';
    display: block;
    position: absolute;
    left: 48%;
    top: 40%;
    width: 40px;
    height: 40px;
    border-style: solid;
    border-color: black;
    border-top-color: transparent;
    border-width: 4px;
    border-radius: 50%;
    -webkit-animation: spin .8s linear infinite;
    animation: spin .8s linear infinite;
}