Begin Wyrm from the game kit

src/app.css

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+/* 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;
+}
+
+.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;
+	}
+}