@glaudsonsilva/react-images-upload/index.css

It's a fork project from https://github.com/JakeHartnell/react-images-upload. I make it to wait for the PR response. Check that repository for documentation and oficial commits.

.fileUploader {
	width: 100%;
}

.fileContainer {
	background: #fff;
	box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, 0.05);
	position: relative;
	border-radius: 10px;
	padding: 20px 0;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	margin: 10px auto;
	transition: all 0.3s ease-in;
}

.fileContainer input {
	opacity: 0;
	position: absolute;
	z-index: -1;
}

.fileContainer p {
	font-size: 12px;
	margin: 8px 0 4px;
}

.fileContainer .errorsContainer {
	max-width: 300px;
	font-size: 12px;
	color: red;
	text-align: left;
}

.fileContainer .chooseFileButton {
	padding: 6px 23px;
	background: #3f4257;
	border-radius: 30px;
	color: white;
	font-weight: 300;
	font-size: 14px;
	margin: 10px 0;
	transition: all 0.2s ease-in;
	cursor: pointer;
	outline: none;
	border: none;
}

.fileContainer .chooseFileButton:hover {
	background: #545972;
}

.fileContainer .uploadFilesButton {
	padding: 5px 43px;
	background: transparent;
	border-radius: 30px;
	color: #3f4257;
	font-weight: 300;
	font-size: 14px;
	margin: 10px 0;
	transition: all 0.2s ease-in;
	cursor: pointer;
	outline: none;
	border: 1px solid #3f4257;
}

.fileContainer .uploadFilesButton:hover {
	background: #3f4257;
	color: #fff;
}

.fileContainer .uploadIcon {
	width: 50px;
	height: 50px;
}

.fileContainer .uploadPicturesWrapper {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	width: 100%;
}

.fileContainer .uploadPictureContainer {
	width: 25%;
	margin: 5%;
	padding: 10px;
	background: #edf2f6;
	display: flex;
	align-items: center;
	justify-content: center;
	height: inherit;
	box-shadow: 0 0 8px 2px rgba(0, 0, 0, 0.1);
	border: 1px solid #d0dbe4;
	position: relative;
}

.fileContainer .uploadPictureContainer img.uploadPicture {
	width: 100%;
}

.fileContainer .deleteImage {
	position: absolute;
	top: -9px;
	right: -9px;
	color: #fff;
	background: #ff4081;
	border-radius: 50%;
	text-align: center;
	cursor: pointer;
	font-size: 26px;
	font-weight: bold;
	line-height: 30px;
	width: 30px;
	height: 30px;
}

.flipMove {
	display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}