Ghost/core/client/app/styles/components/uploader.css

/* Image Uploader
/* ---------------------------------------------------------- */

.image-uploader {
    position: relative;
    overflow: hidden;
    margin: 1.6em 0;
    padding: 55px 60px;
    width: 100%;
    height: auto;
    border: #e1e1e1 3px dashed;
    background: #f9f8f5;
    color: var(--brown);
    text-align: center;
}

.image-uploader a {
    color: var(--brown);
    text-decoration: none;
}

.image-uploader a:hover {
    color: var(--darkgrey);
}

.image-uploader .description {
    margin-top: 10px;
}

.image-uploader .image-upload {
    position: absolute;
    bottom: 0;
    left: 0;
    display: block;
    padding: 10px;
    color: var(--brown);
    text-decoration: none;
    line-height: 12px;
}

.image-uploader .image-upload:hover {
    cursor: pointer;
}

.image-uploader .btn-green {
    position: relative;
    z-index: 700;
    display: inline-block;
    color: #fff;
}

.image-uploader .btn-blue {
    margin: 0 0 0 10px;
}

.image-uploader input.main {
    position: absolute;
    right: 0;
    margin: 0;
    font-size: 23px;
    opacity: 0;
    cursor: pointer;
    transform: scale(14);
    transform-origin: right;
    direction: ltr;
}

.image-uploader input.main.right {
    right: 9999px;
    height: 0;
}

.image-uploader input.url {
    margin: 10px 0;
    padding: 9px 7px;
    outline: 0;
    background: #fff;
    vertical-align: middle;
    font: -webkit-small-control;
    font-size: 1.1em;
}

.image-uploader input.url + .btn.btn-blue {
    color: #fff;
}

.image-uploader .progress {
    position: relative;
    display: block;
    overflow: hidden;
    margin: -19px 0 44px 0;
    background: linear-gradient(to bottom, #f5f5f5, #f9f9f9);
    border-radius: 12px;
    box-shadow: rgba(0, 0, 0, 0.1) 0 1px 2px inset;
}

.image-uploader .fileupload-loading {
    top: 50%;
    display: block;
    margin: -28px auto 0;
    width: 35px;
    height: 28px;
    background-size: contain;
}

.image-uploader .failed {
    position: relative;
    top: -40px;
    font-size: 16px;
}

.image-uploader .bar {
    height: 12px;
    background: var(--blue);
}

.image-uploader .bar.fail {
    background: var(--red);
}


/* Pre-Image-Uploader // TODO: RENAME
/* ---------------------------------------------------------- */

.pre-image-uploader {
    position: relative;
    overflow: hidden;
    margin: 1.6em 0;
    min-height: 46px;
    height: auto;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    color: var(--brown);
}

.pre-image-uploader input {
    position: absolute;
    left: 9999px;
    opacity: 0;
}

.pre-image-uploader a {
    z-index: 10000;
    color: var(--brown);
    text-decoration: none;
}

.pre-image-uploader a:hover {
    color: var(--darkgrey);
}

.pre-image-uploader img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    line-height: 0;
}

.pre-image-uploader .image-cancel {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 300;
    padding: 8px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: var(--border-radius);
    box-shadow: rgba(255, 255, 255, 0.2) 0 0 0 1px;
    color: #fff;
    text-decoration: none;
    line-height: 0;
}

.pre-image-uploader .image-cancel:hover {
    background: var(--red);
    color: #fff;
    cursor: pointer;
}