wp-calypso/client/components/chart/style.scss

@import "@wordpress/base-styles/breakpoints";

$bar-chart-border-radius: 2px;
$year-bar-chart-border-radius: 4px;

// Chart
// Life is a statistical anomaly

.chart {
	position: relative;
	box-sizing: border-box;
	padding: 0 0 0 20px;
}

// Y-axis
// Y-axis markers (lines)

.chart .chart__y-axis-markers {
	position: absolute;
	left: 0;
	right: 0;
	height: 200px;
}

.chart .chart__y-axis-marker {
	position: absolute;
	top: 0;
	width: 100%;
	height: 1px;
	border-top: 1px solid var(--color-neutral-0);
}

// Y-axis marker lines inside each chart__bar
// (This is needed so that bars overlap correctly)
.chart__bar-marker {
	z-index: z-index("root", ".chart__bar-marker");
	position: absolute;
	top: 0;
	width: 100%;
	height: 1px;
	border-top: 1px solid color-mix(in srgb, var(--color-neutral-0) 10%, transparent);
}

.chart__bar-marker,
.chart__y-axis-label,
.chart .chart__y-axis-marker {
	&.is-fifty {
		top: 50%;
	}

	&.is-zero {
		top: 100%;
	}
}

// Y-axis labels
// 1: matches Y-axis padding

$y-axis-padding: 0 20px;

.chart__y-axis {
	position: relative;
	float: right;
	height: 200px;
	padding: $y-axis-padding;
	font-size: $font-body-extra-small;
	color: var(--color-neutral-40);
	margin-bottom: 30px;
}

.chart__y-axis-label {
	position: absolute;
	top: 0;
	right: 20px; // 1
	text-align: right;
}

// For forcing the width of y-axis to the width of the label
// Uses invisible text to establish consistent width while maintaining layout flow
.chart__y-axis-width-spacer {
	color: color-mix(in srgb, transparent 100%, var(--color-surface));
}

// X-axis
// 1: hides spaces between elements

.chart__x-axis {
	position: relative;
	font-size: 0; // 1
	padding: 5px 0;
	min-height: 18px;
	color: var(--color-neutral-60);
}

.chart__x-axis-label {
	position: absolute;
	display: inline-block;
	vertical-align: top;
	font-size: $font-body-extra-small;
	text-align: center;

	font-weight: 400;
	line-height: 24px;
	color: var(--color-neutral-40);
}

// X-axis label indicator
// (vertical thin grey bar)

.chart__x-axis-label::before {
	content: "";
	display: block;
	position: absolute;
	top: -4px;
	left: 50%;
	margin-left: -0.5px;
	width: 1px;
	height: 5px;
	background: var(--color-neutral-60);
}

// X-axis width spacer
// Similar to y-axis, creates consistent width spacing using invisible text
.chart__x-axis-width-spacer {
	color: color-mix(in srgb, transparent 100%, var(--color-surface));
	padding: $y-axis-padding;
	right: 0;

	&::before {
		display: none;
	}
}

// Bar wrapper
// 1: hides spaces between elements

.chart__bars {
	position: relative;
	font-size: 0; // 1
	height: 200px;
	text-align: center;
	overflow: hidden;
	display: flex;
}

// Individual bar
// 1: Needs to be relative so that the contained graphic bar has boundaries
// 2: Animate the bar on mounting to make it consistent with the transitions later when values change

.chart__bar {
	text-align: center;
	display: inline-block;
	position: relative; // 1
	height: 200px;
	-ms-flex-grow: 1;
	flex-grow: 1;
	-ms-flex-shrink: 1;
	flex-shrink: 1;
	transform: scaleY(0);
	transform-origin: 0% 100%;
	animation: growUpOnMounting 0.2s ease-in forwards; // 2

	@keyframes growUpOnMounting {
		100% {
			transform: scaleY(1);
		}
	}

	&:hover {
		cursor: pointer;
		background-color: color-mix(in srgb, var(--color-neutral) 10%, transparent);
	}

	&.is-selected {
		cursor: default;
		background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
	}
}

// Individual bar wrapper & misc
// 1: Positions the bar in the space as defined by .bar
// 2: use `transform` (as opposed to top or height) for better transition performance
// 3: add a transition to make switching between periods nicer
// 4: set `transform-origin` to the bottom so scalling takes the bar up ↑

// Wider bars for period `Year`
.is-period-year {
	.chart__bar-section {
		border-top-left-radius: $year-bar-chart-border-radius;
		border-top-right-radius: $year-bar-chart-border-radius;
	}

	.chart__bar-section-inner {
		border-top-left-radius: $year-bar-chart-border-radius;
		border-top-right-radius: $year-bar-chart-border-radius;
	}
}

.chart__bar-section {
	display: inline-block;
	background-color: var(--color-primary);
	position: absolute;
	right: 16%; // 1
	bottom: 0; // 1
	left: 16%; // 1
	height: 100%;
	transform: scaleY(0); // 2
	transition: transform 0.3s ease-in-out; // 3
	transform-origin: 0% 100%; // 4
	z-index: z-index("root", ".chart__bar-section");
	border-top-left-radius: $bar-chart-border-radius;
	border-top-right-radius: $bar-chart-border-radius;
}

.chart__bar-section-inner {
	background-color: var(--color-primary-dark);
	position: absolute;
	right: 23.33%;
	bottom: 0;
	left: 23.33%;
	border-top-left-radius: $bar-chart-border-radius;
	border-top-right-radius: $bar-chart-border-radius;
}

// Chart legend (wrapper)
// 1: L/R matches padding of y-axis labels in chart

.chart__legend {
	margin-bottom: 16px;
	display: flex;
	align-items: center;
	justify-content: flex-end;

	@media (max-width: $break-medium) {
		padding: 0 16px;
	}
}

// Chart legend options (list)

.chart__legend-options {
	color: var(--color-neutral);
	list-style-type: none;
	margin: 0;
	font-size: $font-body-extra-small;

	@media (max-width: $break-mobile) {
		display: none;
	}
	@container (inline-size < #{$break-mobile}) {
		display: none;
	}
}

// Chart legend option (list item)

.chart__legend-option {
	display: inline;
	text-align: left;

	// Expand labels to create bigger touch targets
	@media (max-width: $break-mobile) {
		width: 50%;
		display: inline-block;

		&:first-child {
			.chart__legend-color {
				margin-left: 2px; // 2
			}
		}
	}

	&:not(:first-child) {
		margin-left: 24px;
	}

	// Chart legend color
	// 1: Needed to overvwrite form styles in main stylesheets
	// 2: Make leftmost legend fit snugly up against the leftmost bars

	.chart__legend-color {
		width: 20px;
		height: 20px;
		background: var(--color-primary);
		display: inline-block;
		border-radius: 4px;
		vertical-align: top;
		margin: 0 8px 0 0;

		&.is-dark-blue {
			background: var(--color-primary-dark);
		}
	}

	// Chart legend checkbox

	.chart__legend-checkbox {
		margin: 0;
		float: none;
		vertical-align: top;

		width: 20px;
		height: 20px;
		background-color: var(--color-surface);
		border: 1px solid var(--color-neutral-10);
		border-radius: 2px;
		margin-right: 8px;

		&:checked::before {
			margin: 3px auto;
		}
	}
}

// Chart legend label
// 1: 19/10px instead of 20/12px because it aligns better optically

.chart__legend-label {
	display: inline-block;
	padding: 0;

	color: var(--studio-black);
	font-size: $font-body-small;
	font-weight: 400;
	line-height: 18px;


	&.form-label {
		display: inline-block;
		margin-bottom: 0;
		font-weight: 400;
	}

	&.is-selectable {
		cursor: pointer;

		&:focus,
		&:hover {
			color: var(--studio-black);
		}
	}

	@media (max-width: $break-mobile) {
		display: block;
	}
}

// Chart empty (message)
// A message displayed when there's absolutely no data to chart

.chart__empty {
	align-items: center;
	display: flex;
	justify-content: center;
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	z-index: z-index("root", ".chart__empty");
	padding: 0 50px;
}

// Chart tooltip

.chart__tooltip {
	// The tooltip doesn't trigger pointer events to prevent causing a premature
	// mouseleave event when the tooltip is hovered over
	pointer-events: none;

	.popover__inner {
		width: 230px;
		text-align: left;

		ul {
			@include clear-fix;
			list-style: none;
			margin: 0;
			padding: 0;

			li {
				font-size: $font-body-extra-small;
				text-transform: uppercase;
				font-weight: 400;
				height: 24px;
				letter-spacing: 0.1em;
				border: 0;

				.wrapper {
					display: block;
					line-height: 24px;
					clear: both;
				}

				.value {
					text-align: right;
					float: right;
					min-width: 22px;
					color: var(--color-neutral-10);
				}

				.label {
					display: block;
					overflow: hidden;
					word-break: break-all;
					vertical-align: baseline;
				}

				.gridicon {
					vertical-align: middle;
					margin-right: 6px;
					margin-top: -3px;
				}
			}
		}
	}

	// @TODO Integrate styles with Stats
	&.is-streak {
		.popover__inner {
			width: 160px;

			li {
				height: 14px;

				.label {
					width: 100%;
					float: left;
					text-align: center;

					.rtl & {
						font-size: $font-body-extra-small;
					}

					.post-count {
						font-weight: 600;
					}
				}

				.value {
					float: none;
				}
			}
		}
	}
}

.chart__tooltip .module-content-list-item {

	// @TODO Integrate styles with Stats
	&.is-date-label {
		font-size: $font-body-extra-small;
		margin-bottom: 2px;
		text-transform: uppercase;
		font-weight: 600;
		border-bottom: 1px solid var(--color-neutral-60);
		padding-bottom: 2px;
	}

	// @TODO Integrate styles with Stats
	&.is-published-item {
		height: 19px;

		.label {
			text-transform: none;
			color: var(--color-neutral-10);
			overflow: hidden;
			letter-spacing: 0;
			height: 19px;
		}

		.value {
			width: 0;
			min-width: 0;

			&::before {
				@include long-content-fade($color: var(--color-neutral-60));
				position: relative;
				left: -30px;
				width: 30px;
				height: 24px;
			}
		}
	}
}

.chart.is-placeholder {
	padding: 8px 20px;

	.chart__bar,
	.chart__bar:hover {
		cursor: default;
		background-color: transparent;

		.chart__bar-section {
			background-color: color-mix(in srgb, var(--color-neutral-0) 50%, transparent);
		}
	}
}