:root {
	--space-05: 4px;
	--space-1:  8px;
	--space-2: 16px;
	--space-3: 24px;
	--space-4: 32px;

	--color-black: #121212;
	--color-gray-6: #333333;
	--color-gray-5: #666666;
	--color-gray-4: #999999;
	--color-gray-3: #CCCCCC;
	--color-gray-2: #DDDDDD;
	--color-gray-1: #EEEEEE;
	--color-white: white;

	--color-border: var(--color-gray-5);

	--font-weight-normal: 400;
	--font-weight-small: 425;
	--font-weight-medium: 500;
	--font-weight-strong: 600;
}

* {
	box-sizing: border-box;

	&::before,
	&::after {
		box-sizing: inherit;
	}
}

html {
	height: 100%;
	background-color: var(--color-gray-4);
}

body {
	height: 100%;
	min-height: 100%;
	margin: 0;
	display: flex;
	flex-flow: column;
	font-family: 'Fredoka', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
	font-optical-sizing: auto;
	font-variation-settings: 'wdth' 100;
	line-height: 1.4;
}

strong {
	font-weight: var(--font-weight-medium);
}

a {
	color: inherit;
	text-decoration-thickness: 1px;
	text-underline-offset: 2px;
}

input[type='checkbox'] {
	margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
	margin-top: var(--space-4);
	font-weight: var(--font-weight-strong);
	padding-bottom: var(--space-2);
	border-bottom: 1px solid var(--color-border);
	margin-bottom: var(--space-2);
	font-weight: var(--font-weight-medium);

	a {
		color: inherit;
		text-decoration: none;

		&:hover,
		&:focus {
			&::after {
				content: ' #';
				color: var(--color-gray-4);
			}
		}
	}
}

h1 {
	font-size: 3rem;
	padding-bottom: 0;
	border-bottom: 0;
	margin-top: 0;
	font-weight: var(--font-weight-normal);
}

.header {
	padding: var(--space-2);
	color: var(--color-white);
	background-color: var(--color-black);
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: var(--space-2);

	a {
		color: inherit;
	}

	img {
		vertical-align: sub;
	}
}

.header__inner {
	display: flex;
	align-items: baseline;
	gap: var(--space-1);

	&:last-of-type {
		text-align: end;
		justify-content: flex-end;
	}
}

.app {
	height: 100%;
	display: flex;
	flex-flow: column;
	overflow: hidden;
}

.app__header {
	background-color: var(--color-gray-1);
	border-bottom: 1px solid var(--color-border);
	padding: var(--space-2);
}

.app__header--loading {
	cursor: progress;

	.input-group:has(:disabled) .input-group__input,
	.button[disabled] {
		cursor: progress;
	}
}

.app__header__form {
	display: flex;
	justify-content: space-between;
	align-items: end;
	gap: var(--space-1);
}

.app__header__inner {
	display: flex;
	height: 100%;
	gap: var(--space-1);
	flex-wrap: wrap;
	align-items: end;

	&:last-of-type,
	&:last-of-type .app__header__form__row {
		text-align: end;
		justify-content: end;
	}
}

.app__header__form__row {
	display: flex;
	width: 100%;
	gap: var(--space-1);
}

.app__preview {
	padding: var(--space-2);
	height: 100%;
	display: flex;
	flex-flow: column;
	overflow: hidden;
}

.app__preview--disabled {
	color: var(--color-gray-4);

	canvas,
	img {
		opacity: 0.5;
	}
}

.app__preview__pane {
	background-color: var(--color-gray-1);
	padding: var(--space-2);
	display: flex;
	justify-content: space-between;
	align-items: center;
	height: 60px;
	border: 1px solid var(--color-border);
}

.app__preview__pane__inner {
	display: flex;
	align-items: center;
	gap: var(--space-1);
}

.app__preview__workspace {
	height: 100%;
	display: flex;
	flex-flow: column;
	overflow: hidden;
}

.app__preview__workspace--hidden {
	display: none;
}

.app__preview__toolbar {
	height: 48px;
	padding: var(--space-1) var(--space-2);
	display: flex;
	justify-content: space-between;
	align-items: center;
	background-color: var(--color-gray-1);
	border: 1px solid var(--color-border);
	border-top: none;
}

.app__preview__canvas {
	padding: var(--space-1);
	height: 100%;
	border: 1px solid var(--color-border);
	border-top: none;
	overflow: auto;

	--color-gray-1: #1A1A1A;

	background-color: var(--color-black);
	background-image:
	linear-gradient(45deg, var(--color-gray-1) 26%, transparent 26%), 
	linear-gradient(135deg, var(--color-gray-1) 26%, transparent 26%),
	linear-gradient(45deg, transparent 75%, var(--color-gray-1) 75%),
	linear-gradient(135deg, transparent 75%, var(--color-gray-1) 75%);
	background-size: 20px 20px; /* Must be a square */
	background-position: 0 0, 10px 0, 10px -10px, 0px 10px; /* Must be half of one side of the square */
}

.app__preview__canvas__inner {
	line-height: 0;

	canvas,
	img {
		margin: var(--space-1);
		border: 2px solid var(--color-gray-5);
	}
}

.button {
	min-width: 84px;
	height: 36px;
	padding: var(--space-05) var(--space-1);
	background-color: var(--color-white);
	border: 1px solid var(--color-border);
	box-shadow: 0 1px 0 var(--color-border);
	border-radius: 4px;
	cursor: pointer;
	color: inherit;
	font: inherit;

	&[disabled] {
		cursor: not-allowed;
		color: var(--color-gray-4);
		border-color: var(--color-gray-3);
		box-shadow: 0 1px 0 var(--color-gray-3);
	}
}

.button--primary {
	font-weight: var(--font-weight-medium);
	color: var(--color-white);
	background-color: #2E7D32;
	border-color: #0e4212;
	box-shadow: 0 1px 0 #0e4212;

	&[disabled] {
		color: var(--color-white);
		background-color: #2E7D32;
		border-color: #0e4212;
		box-shadow: 0 1px 0 #0e4212;
		opacity: 0.5;
	}
}

.icon-button {
	font-size: 1.125rem;
	width: 36px;
	height: 36px;
	display: flex;
	justify-content: center;
	align-items: center;
	padding: 0;
	appearance: none;
	border: none;
	background: none;
	cursor: pointer;
	color: inherit;
	text-decoration: none;

	&[disabled] {
		cursor: not-allowed;
		color: var(--color-gray-4);
	}
}

.input-group {
	display: flex;

	&:has(:disabled) {
		cursor: not-allowed;

		.input-group__input {
			cursor: inherit;
			color: var(--color-gray-4);
			border-color: var(--color-gray-4);
			background-color: var(--color-white);
			opacity: 0.7;
		}

		.input-group__label {
			color: var(--color-gray-4);
		}
	}

	&:has([type='checkbox']) {
		cursor: pointer;
	}
}

.input-group__label {
	width: 80px;
	display: inline-flex;
	justify-content: end;
	align-items: center;
	text-align: end;
	padding: var(--space-05);
	white-space: nowrap;
}

.input-group__label--short {
	width: 40px;
}

.input-group__label--long {
	width: auto;
}

.input-group__input {
	width: 200px;
	height: 36px;
	padding: var(--space-05);
	font: inherit;
	border: 1px solid var(--color-border);
	border-radius: 4px;
	cursor: pointer;

	@media screen and (max-width: 1300px) {
		width: 160px;
	}

	@media screen and (max-width: 1100px) {
		width: 100px;
	}

	&[type='checkbox'] {
		width: auto;
		height: auto;
	}
}

.input-group__input--long {
	width: calc(480px + var(--space-1)); /* 480 comes from (200 * 2) + 80 */

	@media screen and (max-width: 1300px) {
		width: calc(400px + var(--space-1));
	}

	@media screen and (max-width: 1100px) {
		width: calc(280px + var(--space-1));
	}
}

.pixel-art {
	image-rendering: pixelated;
}

.messages {
}

.message {
	margin-top: var(--space-1);
	border: 1px solid var(--color-gray-5);
	padding: var(--space-1);
	background-color: var(--color-white);
}

.message--error {
	color: red;
	border-color: red;
}

.message--warning {
	background-color: antiquewhite;
}

.content {
	width: 100%;
	max-width: 960px;
	margin: 0 auto;
	padding: var(--space-2);
}

.content__inner {
	background-color: var(--color-white);
	border: 1px solid var(--color-border);
	padding: var(--space-4);
}

.footer {
	margin: auto auto 0;
	max-width: 960px;
	padding: 0 var(--space-4) var(--space-2);
	font-size: 0.75rem;
	font-weight: var(--font-weight-small);
	text-align: center;
	color: var(--color-gray-6);

	p {
		margin: 0;
	}
}