:root {
	--gap: 0.5rem;
	--padding: 0.5rem;
	--border-width: 1px;
	--hr-border-width: 4px;
	--border-radius: 3px;
	--border-radius: 3px;
	--outline-width: calc(1rem / 16 * 3);
	--menu-height: 20px;

	--bg-color: #f7f7f7;
	--bg-panel: #f7f7f7;
	--bg-canvas: #e0e0e0;
	--bg-input: rgba(0, 0, 0, 0.2);
	--bg-button: #e0e0e0;
	--bg-button-hover: rgba(0, 0, 0, 0.3);
	--bg-scrollbar: rgba(0, 0, 0, 0.5);
	--border-color: rgba(0, 0, 0, 0.2);
	--text-color: #000;

	--highlight-color: #0077ff;
	--icon-filters: grayscale(100%) contrast(10);

	--toolbar-width: 35px;
	--input-width: 110px;
	--input-large-width: 60px;
	--input-medium-width: 40px;
	--input-small-width: 20px;

	--transparent-grid-background: #cccccc;
}

/* Dark mode if the user's system prefers it */
@media (prefers-color-scheme: dark) {
	:root {
		--bg-color: #474747;
		--bg-panel: #474747;
		--bg-canvas: #252525;
		--bg-button: #252525;
		--text-color: #f9f9f9;
		--icon-filters: grayscale(100%) contrast(5) invert(1);
	}
}

* {
	border-style: solid;
	border-width: 0;
	border-color: var(--border-color);
	column-rule-style: solid;
	column-rule-color: var(--bg-panel);
	box-sizing: border-box;
}

body {
	margin: 0;
	overflow: hidden;
	box-sizing: border-box;
	user-select: none;
	background-color: var(--bg-color);
	color: var(--text-color);
	position: relative;
	font-family: "Open Sans", sans-serif;
	font-size: 13px;
}

button {
	background-color: var(--bg-button);
	padding: 3px;
	cursor: pointer;
	color: var(--text-color);
	width: var(--toolbar-width);
	height: var(--toolbar-width);
}

button:hover {
	background-color: var(--bg-button-hover);
}

hr {
	border-top: var(--hr-border-width) solid var(--border-color);
	display: inline-flex;
	margin: 0;
	padding: 0;
}

input,
textarea,
select {
	background-color: var(--bg-input);
	color: var(--text-color);
	border: var(--border-width) solid var(--bg-input);
	width: var(--input-width);
}

input[type="color"],
input[type="checkbox"] {
	width: var(--toolbar-width);
	height: var(--toolbar-width);
	background-color: var(--bg-button);
	border: none;
}

input[type="radio"] {
	width: var(--toolbar-width);
}

input,
textarea {
	margin: 2px 0;
	padding: 3px;
	box-sizing: border-box;
}

.tool-button {
	width: var(--toolbar-width);
	height: var(--toolbar-width);
	margin: 0;
	font-size: large;
}

.tool-button:hover {
	background-color: var(--bg-button-hover);
}

.panel {
	position: absolute;
	top: var(--menu-height);
	background-color: var(--bg-panel);
	height: 100%;
}

.panel:hover {
	-webkit-mask-position: left top;
}

.panel-head {
	background-color: rgba(0, 0, 0, 0.25);
	cursor: pointer;
	border-bottom-width: var(--border-width);
	padding: 8px;
	flex-direction: row !important;
	align-items: center;
	justify-content: space-between;
}

.panel-body {
	cursor: default;
	display: flex;
	flex-direction: column;
	background-color: var(--bg-panel);
}

.panel-body > div > div {
	display: flex;
	flex-direction: column;
}

.panel-section {
	color: var(--text-color);
	cursor: default;
	display: flex;
	flex-direction: column;
	position: relative;
	padding-top: var(--gap);

	overflow-x: hidden;
	overflow-y: auto;
	scrollbar-color: var(--bg-scrollbar) rgba(0, 0, 0, 0.3);
	scrollbar-width: thin;
	padding-bottom: var(--gap);
}

.panel-body > .panel-section:not([hidden]) {
	border-bottom-width: var(--gap);
	border-radius: 0;
}

.panel-section > div {
	display: flex;
}

.panel-section.two_col_grid {
	padding-left: var(--gap);
	padding-right: var(--gap);
	padding-top: var(--gap);

	display: grid;
	grid-template-columns: repeat(2, 0.5fr);

	justify-items: left;
	align-items: center;
}

.panel-section.three_col_grid {
	padding-left: var(--gap);
	padding-right: var(--gap);
	padding-top: var(--gap);

	display: grid;
	grid-template-columns: repeat(3, 0.5fr);

	justify-items: left;
	align-items: center;
}

.panel-section.four_col_grid {
	padding-left: var(--gap);
	padding-right: var(--gap);
	padding-top: var(--gap);

	display: grid;
	grid-template-columns: repeat(4, 0.5fr);

	justify-items: left;
	align-items: center;
}

.panel-section > div > label {
	min-width: 4rem;
	padding: var(--gap);
}

.panel-section.layer {
	max-height: 110px;
}

#canvasHolder {
	background-color: var(--bg-canvas);
	touch-action: none;
}

#toolsHolder {
	width: var(--toolbar-width);
	display: inline-flex;
	flex-flow: column wrap;
	overflow: hidden;
}

#propertiesHolder {
	width: 190px;
	right: 0;
	background-color: var(--bg-canvas);

	scrollbar-width: thin;
	overflow-y: auto;
}

.menu-container {
	height: var(--menu-height);
	right: 0;
	position: relative;
	z-index: 1;
}

#strokeWidth {
	width: var(--input-large-width);
}

#strokeWidthNumber {
	width: var(--input-medium-width);
}

#contributorsContainer {
	width: 100%;
	overflow: hidden;
	white-space: nowrap;
	--animation-play-state: paused;
}

#contributors {
	color: var(--text-color);
	font-size: 1em;
	padding-right: 10px;
	padding-left: 10px;
	padding-top: 3px;
	padding-bottom: 3px;
	display: inline-block;
	animation: scroll-left 60s linear normal infinite;
	animation-delay: -30s;
	animation-play-state: var(--animation-play-state);
}

#contributorsContainer:hover {
	--animation-play-state: running;
}

@keyframes scroll-left {
	0% {
		transform: translateX(100%);
	}
	100% {
		transform: translateX(-100%);
	}
}

.radio {
	display: none;
}

.radio-button-button {
	display: inline-block;

	background-color: var(--local-bg-color, var(--bg-color));
	cursor: pointer;
	color: var(--text-color);

	width: var(--toolbar-width);
	height: var(--toolbar-width);
	min-width: var(--toolbar-width) !important;

	padding: 2px;
}

/* Add hover effect to look more like a button */
.radio-button-button:hover {
	background-color: var(--bg-button-hover);
}

.icon {
	width: 100%;
	filter: var(--icon-filters);
}

input[type="checkbox"] {
	-webkit-appearance: none; /* For WebKit browsers */
	appearance: none; /* Standard syntax */
	background-color: #fff; /* Unchecked background color */
	width: var(--toolbar-width);
	height: var(--toolbar-width);
	cursor: pointer;
	position: relative;
	border: none;
	display: flex;
	justify-content: center;
	align-items: center;
}

input[type="checkbox"]:checked::before {
	content: "\2713";
	color: black;
	font-size: 22px;
	position: absolute;
}

.highlight-bg {
	background-color: var(--highlight-color);
}

.colorInput {
	position: relative;
	background-image: linear-gradient(
			45deg,
			var(--transparent-grid-background) 25%,
			transparent 25%
		),
		linear-gradient(
			-45deg,
			var(--transparent-grid-background) 25%,
			transparent 25%
		),
		linear-gradient(
			45deg,
			transparent 75%,
			var(--transparent-grid-background) 75%
		),
		linear-gradient(
			-45deg,
			transparent 75%,
			var(--transparent-grid-background) 75%
		);
	background-size: 10px 10px;
	background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
}

.colorInput.noColor {
	background: linear-gradient(
		to top right,
		white 0%,
		white 48%,
		red 48%,
		red 52%,
		white 52%,
		white 100%
	);
}

.colorInput > div {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
}

#colorSelector {
	padding: var(--padding);
	background: var(--bg-panel);
	box-shadow: 0 0 10px var(--border-color);
}

#colorSelector input {
	width: 75px;
}

#colorSelector input[type="number"] {
	width: 49px;
}