.theme-thread-pin() {
	@thread-pin-background: transparent;
	@thread-pin-color: #ffffff;
	@thread-pin-border: 1px solid #ffffff;

	@thread-pin-selected-background: transparent;
	@thread-pin-selected-color: #ffffff;
	@thread-pin-selected-border: 1px solid #ffffff;

	@thread-pin-unread-background: @background-color-4;
	@thread-pin-unread-color: #ffffff;
	@thread-pin-unread-border: 1px solid @background-color-4;

	@thread-pin-unread-selected-background: @background-color-4;
	@thread-pin-unread-selected-color: #ffffff;
	@thread-pin-unread-selected-border: 1px solid @background-color-4;
}

.center_panel .items_list .item {
	.data .thread-pin {
		border-radius: 12px;
		padding: 4px 6px 3px;
	}

	.data .thread-pin,
	&.checked .data .thread-pin,
	&.selected .data .thread-pin {
		&:hover {
			background-color: transparent;
			border-color: @text-color-1;
			color: @text-color-1;
		}

		&.unread:hover {
			background-color: darken(@background-color-4, 5%);
			border-color: darken(@background-color-4, 5%);
			color: @text-color-1;
		}
	}
}

.theme-message-toolbar-item() {};

.theme-layout-horiz-split() {};

@theme-mail-message-header-background: @background-color-1;
@theme-mail-viewer-notice-background: #ffffc5;
@theme-mail-viewer-notice-link-color: @action-color-1;
@theme-mail-viewer-appointment-background: lighten(#033f49, 10%);
@theme-mail-viewer-appointment-border-bottom: none;
@theme-mail-compose-showcc-link-color: @action-color-1;
@theme-mail-compose-showcc-link-hover-color: darken(@action-color-1, 10%);
@theme-mail-compose-minimized-background: @action-color-1;

.panel.item_viewer.message_viewer {
	.message_header {
		&, .title, .subject {
			color: @text-color-3;
		}

		.table-compressor {
			color: @background-color-3;

			.arrow:after {
				background: @theme-mail-message-header-background;
			}
		}
	}

	.panels.has_attachments .message_panel {
		border-right: 1px solid @border-color;
	}

	.message_content .message_body_info {
		color: @text-color-1;
	}

	.appointment {
		color: #E4E4E4;

		.row.row_info > * {
			color: darken(#E4E4E4, 5%);
		}
	}

	.message_content_not_empty_text {
		background: #ffffff;
	}
}

.auroraMain .attachments,
.panel.item_viewer.message_viewer .attachments {
	color: #E4E4E4;
	
	.children {
		background: @background-color-2;
		box-shadow: 0 0 0 8px @background-color-2;
	}

	.download_menu .link {
		&.hover {
			color: @text-color-3 !important;
		}

		.icon {
			color: @background-color-4;
		}
	}

	&.upload .item .cancel {
		background: #F15B46;
	}

	.item {
		color: #E4E4E4;

		.item_content {
			background: #2D303B;
			border: solid 1px #3A3D4C;
			box-shadow: none;
		}

		.main_action {
			background: #2d303b;
		}

		.image {
			border-bottom: 1px solid #3A3D4C;
		}

		.size {
			color: #616162;
		}
		
		.progress .progress-percent {
			color: #E4E4E4 !important;
		}
	}
}

.auroraMain {
	.MailComposeLayout .panels, .compose_popup .panels,
	.compose_popup .popup_panel {
		background: none;
	}

	.panel.compose {
		background: none;

		input,
		textarea,
		select,
		.input {
			border: none !important;
		}

		.panel.message_panel {
			background: @background-color-2;
			border-radius: 0;
			border-top: 1px solid @border-color;
			border-right: 1px solid @border-color;

			.table-compressor .arrow:after {
				background: @background-color-2;
				color: @background-color-3;
			}

			.panel_top {
				padding: 0;
			}

			.panel_bottom {
				padding: 3px 10px 4px;

				.hotkey_value {
					color: darken(@text-color-1, 5%);
					text-shadow: none;
				}

				.hotkey_action {
					color: @text-color-1;
					text-shadow: none;
				}
			}
		}

		.panel_content > .toolbar {
			background: @background-color-2;

			.back .icon,
			.new_window .icon,
			.save_and_close .icon,
			.minimize .icon,
			.maximize .icon,
			.confirmation .icon,
			.pgp .icon {
				color: @text-color-2;
			}
		}

		table.fields {
			input,
			select,
			textarea,
			.input {
				background: @background-color-2;
				-webkit-background-clip: text;
				-webkit-text-fill-color: @text-color-1;
			}

			& > tbody > tr {
				border-bottom: 1px solid @border-color;
			}

			td.label {
				width: 110px;
			}

			td.value {
				padding: 4px 11px 4px 0px;

				td.value {
					padding: 0px;
				}
			}
		}

		.attachments_panel {
			background: @background-color-2;
			border-top: solid 1px @border-color;
		}

		.html_editor {
			padding: 3px 9px;

			.workarea {
				border-radius: 0 0 4px 4px;
			}

			.disable_mask {
				height: calc(100% - 6px);
				width: calc(100% - 18px);
			}
		}

		.notice.notice-auto-encrypt {
			border-color: @border-color;
		}

		&:not(.compose-auto-encrypt) .notice.notice-auto-encrypt {
			color: @text-color-1;
		}
	}

	.html_editor {
		select {
			background: transparent;
			color: #595959 !important;
		}
	}

	.popup_schedule {
		.row_select_datetime {
			color: @text-color-1;
		}

		.simple_list {
			border: 1px solid @border-color;

			.item {
				border-bottom: 1px solid @border-color;
			}
		}
	}
}

• [F] styles.less
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