Overleaf/services/web/public/stylesheets/app/editor/track-changes.less

@changesListWidth:   250px;
@changesListPadding: @line-height-computed / 2;

@selector-padding-vertical: 10px;
@selector-padding-horizontal: @line-height-computed / 2;
@day-header-height: 24px;

@range-bar-color: @link-color;
@range-bar-selected-offset: 14px;

#trackChanges {
	.upgrade-prompt {
		position: absolute;
		top: 0;
		bottom: 0;
		left: 0;
		right: 0;
		z-index: 100;
		background-color: rgba(128,128,128,0.4);
		.message {
			margin: auto;
			margin-top: 100px;
			padding: (@line-height-computed / 2) @line-height-computed;
			width: 400px;
			background-color: white;
			border-radius: 8px;
		}
	}

	.diff-panel {
		.full-size;
		margin-right: @changesListWidth;
	}

	.diff {
		.full-size;
		.toolbar {
			padding: 3px;
			.name {
				float: left;
				padding: 3px @line-height-computed / 4;
				display: inline-block;
			}
		}
		.diff-editor {
			.full-size;
			top: 40px;
		}
		.hide-ace-cursor {
			.ace_active-line, .ace_cursor-layer, .ace_gutter-active-line {
				display: none;
			}
		}
		.diff-deleted {
			padding: @line-height-computed;
		}
	}

	aside.change-list {
		border-left: 1px solid @toolbar-border-color;
		height: 100%;
		width: @changesListWidth;
		position: absolute;
		right: 0;

		.loading {
			text-align: center;
			font-family: @font-family-serif;
		}

		ul {
			li.change {
				position: relative;
				user-select: none;
				-ms-user-select: none;
				-moz-user-select: none;
				-webkit-user-select: none;

				.day {
					background-color: #fafafa;
					border-bottom: 1px solid @toolbar-border-color;
					padding: 4px;
					font-weight: bold;
					text-align: center;
					height: @day-header-height;
					font-size: 14px;
					line-height: 1;
				}
				.selectors {
					input {
						margin: 0;
					}
					position: absolute;
					left: @selector-padding-horizontal;
					top: 0;
					bottom: 0;
					width: 24px;
					.selector-from {
						position: absolute;
						bottom: @selector-padding-vertical;
						left: 0;
						opacity: 0.8;
					}
					.selector-to {
						position: absolute;
						top: @selector-padding-vertical;
						left: 0;
						opacity: 0.8;
					}
					.range {
						position: absolute;
						left: 5px;
						width: 4px;
						top: 0;
						bottom: 0;
					}
				}
				.description {
					padding: (@line-height-computed / 4);
					padding-left: 38px;
					min-height: 38px;
					border-bottom: 1px solid @toolbar-border-color;
					cursor: pointer;
					&:hover {
						background-color: @gray-lightest;
					}
				}
				.users {
					.user {
						font-size: 0.8rem;
						color: @gray;
						text-transform: capitalize;
						position: relative;
						padding-left: 16px;
						.color-square {
							height: 12px;
							width: 12px;
							border-radius: 3px;
							position: absolute;
							left: 0;
							bottom: 3px;
						}
						.name {
							width: 94%;
							white-space: nowrap;
							overflow: hidden;
							text-overflow: ellipsis;
						}
					}
				}
				.time {
					float: right;
					color: @gray;
					display: inline-block;
					padding-right: (@line-height-computed / 2);
					font-size: 0.8rem;
					line-height: @line-height-computed;
				}
				.docs {
					font-weight: bold;
					font-size: 0.9rem;
				}
			}
			li.loading-changes, li.empty-message {
				padding: 6px;
				cursor: default;
				&:hover {
					background-color: inherit;
				}
			}
			li.selected {
				border-left: 4px solid @range-bar-color;
				.day {
					padding-left: 0;
				}
				.description {
					padding-left: 34px;
				}
				.selectors {
					left: @selector-padding-horizontal - 4px;
					.range {
						background-color: @range-bar-color;
					}
				}
			}
			li.selected-to {
				.selectors {
					.range {
						top: @range-bar-selected-offset;
					}
					.selector-to {
						opacity: 1;
					}
				}
			}
			li.selected-from {
				.selectors {
					.range {
						bottom: @range-bar-selected-offset;
					}
					.selector-from {
						opacity: 1;
					}
				}
			}
			li.first-in-day {
				.selectors {
					.selector-to {
						top: @day-header-height + @selector-padding-vertical;
					}
				}
			}
			li.first-in-day.selected-to {
				.selectors {
					.range {
						top: @day-header-height + @range-bar-selected-offset;
					}
				}
			}
		}
		ul.hover-state {
			li {
				.selectors {
					.range {
						background-color: transparent;
						top: 0;
						bottom: 0;
					}
				}
			}
			li.hover-selected {
				.selectors {
					.range {
						top: 0;
						background-color: @gray-light;
					}
				}
			}
			li.hover-selected-to {
				.selectors {
					.range {
						top: @range-bar-selected-offset;
					}
					.selector-to {
						opacity: 1;
					}
				}
			}
			li.hover-selected-from {
				.selectors {
					.range {
						bottom: @range-bar-selected-offset;
					}
					.selector-from {
						opacity: 1;
					}
				}
			}
			li.first-in-day.hover-selected-to {
				.selectors {
					.range {
						top: @day-header-height + @range-bar-selected-offset;
					}
				}
			}
		}
	}
}

.editor-dark {
	#trackChanges {
		aside.change-list {
			border-color: @editor-dark-toolbar-border-color;
			
			ul li.change {
				.day {
					background-color: darken(@editor-dark-background-color, 10%);
					border-bottom: 1px solid @editor-dark-toolbar-border-color;
				}
				.description {
					border-bottom: 1px solid @editor-dark-toolbar-border-color;
					&:hover {
						background-color: black;
					}
				}
			}
		}
	}
}