@keyframes isloadingspin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.is-loading {
    background: transparent !important;
    color: transparent !important;
    border: transparent !important;
    pointer-events: none !important;
    position: relative !important;
    overflow: hidden !important;
}

.is-loading:after {
    content: "";
    position: absolute;
    display: block;
    width: 4rem;
    height: 4rem;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: isloadingspin 500ms infinite linear;
    border-width: 4px;
    border-style: solid;
    border-color: #ececec #ececec #666 #666;
    border-radius: 100%;
}

.markdown pre.is-loading,
.editor-loading.is-loading {
    height: 12rem;
}