/* Design tokens. Every game picks its own palette and typeface here; the
   components only ever name these tokens, so a new look is this block. */
:root {
	--slate: #1c2830;
	--slate-deep: #121a20;
	--bone: #e9e2d2;
	--bone-dim: #98a4ab;
	--bone-faint: #5d6b73;
	--ember: #f0a53a;
	--frost: #8cc8e0;
	--blood: #e0655c;
	--rule: rgba(233, 226, 210, 0.14);
	--rule-strong: rgba(233, 226, 210, 0.32);
	--font: 'Iowan Old Style', Georgia, serif;
	--gutter: clamp(16px, 3vw, 40px);
}

* {
	box-sizing: border-box;
}

html {
	background: var(--slate-deep);
}

body {
	margin: 0;
	background: var(--slate-deep);
	color: var(--bone);
	font-family: var(--font);
	font-size: 17px;
	line-height: 1.55;
	-webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
	font-weight: 500;
	line-height: 1.15;
	margin: 0;
}

p {
	margin: 0;
}

button,
select,
input,
textarea {
	font: inherit;
	color: inherit;
}

button {
	cursor: pointer;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
	outline: 2px solid var(--frost);
	outline-offset: 2px;
}

select,
input[type='text'],
textarea {
	background: var(--slate-deep);
	border: 1px solid var(--rule-strong);
	border-radius: 4px;
	padding: 0.3rem 0.6rem;
	max-width: 100%;
	color: var(--bone);
}

button:disabled {
	opacity: 0.35;
	cursor: not-allowed;
}

/* An action written as a word in running text. */
.link {
	background: none;
	border: 0;
	padding: 0;
	font-size: inherit;
	color: var(--frost);
	text-decoration: underline;
}

/* The one button that commits a move. */
.commit {
	background: var(--bone);
	color: var(--slate-deep);
	border: 0;
	border-radius: 4px;
	padding: 0.6rem 1.4rem;
	font-size: 1.05rem;
	font-weight: 500;
}

.commit:hover:not(:disabled) {
	background: #fff;
}

.commit.small {
	padding: 0.4rem 0.9rem;
	font-size: 1rem;
}

/* A bordered, unemphatic button: navigation, secondary actions. */
.quiet {
	background: none;
	border: 1px solid var(--rule-strong);
	border-radius: 4px;
	padding: 0.4rem 0.9rem;
	white-space: nowrap;
	color: var(--bone);
	text-decoration: none;
	line-height: 1.55;
}

.quiet:hover:not(:disabled) {
	border-color: var(--bone);
}

.muted {
	color: var(--bone-dim);
}

.small {
	font-size: 0.85rem;
}

.warning {
	color: var(--blood);
}

.eyebrow {
	font-size: 0.85rem;
	letter-spacing: 0.12em;
	color: var(--bone-faint);
	margin-bottom: 0.2rem;
}

.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
}

/* The × that sends a bot away or forgets a game. */
.dismiss {
	background: none;
	border: 0;
	color: var(--bone-faint);
	font-size: 1.1rem;
	padding: 0 0.4rem;
	line-height: 1;
}

.dismiss:hover {
	color: var(--blood);
}

/* A page of reading beside the game: the rules, the guide. */
.reading {
	max-width: 46rem;
	margin: 0 auto;
	padding: 1.5rem var(--gutter) 4rem;
}

.reading a {
	color: var(--frost);
}

.reading .back {
	font-size: 0.95rem;
}

.reading h1 {
	font-size: 2.4rem;
	font-weight: 300;
	margin: 0.5rem 0 0.3rem;
}

.reading .lede {
	color: var(--bone-dim);
	max-width: 40em;
}

/* A lesson: the boards beside the words. */
.reading.wide {
	max-width: 1280px;
}

/* The chronicle's lines, coloured by what they tell, at the table and in a lesson. */
.telling li.capture {
	color: var(--ember);
}

.telling li.check,
.telling li.freeze,
.telling li.promotion {
	color: var(--frost);
}

.telling li.note {
	color: var(--bone-dim);
	font-style: italic;
}

.telling li.end {
	color: var(--blood);
}

.reading section {
	padding: 1.25rem 0 0.5rem;
	border-top: 1px solid var(--rule);
	margin-top: 1rem;
}

.reading h2 {
	font-size: 1.5rem;
	margin-bottom: 0.7rem;
}

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation: none !important;
		transition: none !important;
	}
}