joplin/ElectronClient/app/style.css

body, textarea {
	margin: 0;
	padding: 0;
	border: none;
}

#react-root {
	height: 100%;
	overflow: hidden;
}

.note-list .list-item:hover {
	background-color: rgba(0,160,255,0.1) !important;
}

.side-bar .list-item:hover,
.side-bar .synchronize-button:hover {
	background-color: #453E53;
}

.side-bar .list-item:active,
.side-bar .synchronize-button:active {
	background-color: #564B6C;
}

.header .button:hover {
	background-color: rgba(0,160,255,0.1);
	border: 1px solid rgba(0,160,255,0.5);
	box-sizing: 'border-box';
}

.header .button:active {
	background-color: rgba(0,160,255,0.2);
	border: 1px solid rgba(0,160,255,0.7);
	box-sizing: 'border-box';
}

.header .button {
	border: 1px solid rgba(0,160,255,0);
}

.icon-button:hover {
	background-color: rgba(0,0,0,0.05) !important;
	border: 1px solid rgba(0,0,0,0.10);
	border-radius: 5px;
}

.icon-button:active {
	background-color: rgba(0,0,0,0.10) !important;
	border: 1px solid rgba(0,0,0,0.15);
	border-radius: 5px;
}