hehe/user/plugins/admin/themes/grav/scss/template/_dropzone.scss

/* The MIT License */

$preview-width: 200px;
$preview-height: 150px;

.dropzone {
    position: relative;
    border-radius: $form-border-radius;
    min-height: 4rem;

    &.dz-clickable {
        cursor: pointer;
    }
    &.dz-drag-hover {
        border-color: rgba(0,0,0,0.15);
        background: rgba(0,0,0,0.04);
    }
    &.dz-started .dz-message {
        display: none;
    }
    .dz-message {
        opacity: 1;
        -ms-filter: none;
        filter: none;
    }
    .dz-preview {
        position: relative;
        display: inline-block;
        margin: 1rem 1rem 1.5rem 1rem;
        vertical-align: top;

        &.dz-file-preview [data-dz-thumbnail] {
            display: none;
        }

        &.dz-error .dz-error-mark {
            display: block;
        }

        &.dz-success .dz-success-mark {
            display: block;
        }

        .dz-success-mark, .dz-error-mark {
            font-family: FontAwesome;
            display: none;
            position: absolute;
            width: 22px;
            height: 22px;
            font-size: 18px;
            line-height: 25px;
            border-radius: 100%;
            text-align: center;
            right: 2px;
            top: 2px;
            span {
                display: none;
            }
        }
        &:hover {
            .dz-success-mark, .dz-error-mark {
                display: none;
            }
        }

        .dz-success-mark {
            &::after {
                content: '\f00c';
            }
        }

        .dz-error-mark {
            &::after {
                content: '\f12a';
            }
        }

        .dz-progress {
            position: absolute;
            top: $preview-height;
            left: 0px;
            right: 0px;
            height: 4px;
            display: none;

            .dz-upload {
                display: block;
                position: absolute;
                top: 0;
                bottom: 0;
                left: 0;
                width: 0%;
            }
        }

        .dz-error-message {
            display: none;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            font-size: 0.9rem;
            line-height: 1.2;
            padding: 8px 10px;
            z-index: 500;
        }

        &.dz-processing .dz-progress {
            display: block;
        }

        &:hover {
            .dz-remove, .dz-unset, .dz-view, .dz-insert, .dz-metadata {
                display: block;
            }

        }

        &:hover.dz-error .dz-error-message {
            display: block;
        }

        //.dz-remove, .dz-unset, .dz-insert {
        //    display: none;
        //}

        .dz-filename {
            position: absolute;
            z-index: 1;
            bottom: 0;
            width: 100%;
            padding: 0 5px;
            background: rgba(0,0,0,0.3);
            color: #fff;
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .dz-remove, .dz-unset, .dz-view, .dz-insert, .dz-metadata {
            display: none;
            position: absolute;
            width: 25px;
            height: 25px;
            right: -25px;
            font-size: 0;
            cursor: pointer;

            &:hover {
                &:after {
                    color: #fff;
                }
            }

            &:after {
                text-align: center;
                display: block;
                color: #999;
                font-family: FontAwesome;
                font-size: 18px;
                line-height: 25px;
            }
        }

        .dz-insert {
            top: -1px;
            border-top-right-radius: 4px;
            &:after {
                content: '\f055';
            }
        }

        .dz-view {
            top: 24px;
            &:after {
                content: '\f06e';
            }
        }

        .dz-remove {
            top: 72px;
            &:after {
                content: '\f1f8';
            }
        }

        .dz-unset {
            top: 96px;
            border-bottom-right-radius: 4px;
            &:after {
                content: '\f00d';
            }
        }
        
        .dz-metadata {
            top: 49px;
            &:after {
                content: '\f05a';
            }
        }

        &.dz-no-editor {
            .dz-view {
                top: -1px;
                border-top-right-radius: 4px;
            }
            .dz-remove {
                top: 24px;
            }
            .dz-unset {
                top: 72px;
            }
        }


        //&:hover .dz-remove, .dz-unset:not(.file-thumbnail-remove), &:hover .dz-insert {
        //    display: block;
        //    position: absolute;
        //    left: 0;
        //    right: 0;
        //    bottom: 22px;
        //    width: 50%;
        //    text-align: center;
        //    cursor: pointer;
        //    font-size: 0.8rem;
        //}

        &:hover .dz-remove, &:hover .dz-unset {
            &.file-thumbnail-remove {
                display: block;
            }

            &:not(.file-thumbnail-remove) {
                left: inherit;
                border-left: 0;
            }
        }

        //&:hover .dz-insert {
        //    right: inherit;
        //}
        //
        //&.hide-backface:hover {
        //    .dz-remove, .dz-unset, .dz-insert {
        //        display: none;
        //    }
        //}

        &.dz-processing {
            .dz-details {
                overflow: hidden;

                img {
                    //position: absolute;
                    //left: 50%;
                    //top: 50%;
                    //height: auto;
                    //width: 100%;
                    //-webkit-transform: translate(-50%,-50%);
                    //-ms-transform: translate(-50%,-50%);
                    //transform: translate(-50%,-50%);
                }
            }
        }

        .dz-details {
            width: $preview-width;
            height: $preview-height;
            position: relative;
            font-size: 0.8rem;

            img {
                position: absolute;
                object-fit: contain;
                top: 0;
                left: 0;
                width: $preview-width;
                height: $preview-height;
            }

            .dz-size {
                position: absolute;
                bottom: -28px;
                left: 0;
                right: 0;
                text-align: center;
                font-size: 0.8rem;
                height: 28px;
                line-height: 28px;
            }
        }


    }


    &.dz-clickable {
        .dz-message, .dz-message span {
            cursor: pointer;
            text-align: center;
            font-size: 1.2rem;
            line-height: 1.4;
            margin: 1rem 0;
        }
    }
    * {
        cursor: default;
    }
}