The masthead, the scrim, the quiet button and the colophon are styled once in app.css instead of pasted into each page and slip with drifting paddings; the style blocks of the play page and the board are indented like the rest of the files; and comments in script and CSS say what the code does or guards, in plain words, where they had been written in the game's own voice

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

src/app.css

@@ -108,6 +108,100 @@ button:disabled {
 	background: #fff;
 }
 
+/* The smaller reveal used in forms and slips. Qualified with the element so it
+   outranks a component's scoped `.small` text rule on the same button. */
+button.reveal.small {
+	padding: 0.4rem 0.9rem;
+	font-size: 1rem;
+}
+
+/* A secondary action: an outlined button or link. */
+.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);
+}
+
+/* The page head on the play and join pages: title and standfirst on the left, actions on the right. */
+.masthead {
+	display: flex;
+	align-items: flex-start;
+	justify-content: space-between;
+	gap: 1rem;
+	padding: 1rem var(--gutter) 0.6rem;
+	max-width: 1280px;
+	margin: 0 auto;
+}
+
+.masthead h1 {
+	font-size: clamp(2rem, 4vw, 2.7rem);
+	font-weight: 300;
+	font-variation-settings: 'opsz' 144;
+	letter-spacing: -0.01em;
+}
+
+.standfirst {
+	max-width: 38em;
+	color: var(--bone-dim);
+	margin-top: 0.4rem;
+}
+
+.standfirst em {
+	color: var(--bone);
+}
+
+.masthead .actions {
+	display: flex;
+	flex-wrap: wrap;
+	gap: 0.5rem;
+	flex-shrink: 0;
+	min-width: 0;
+	max-width: 100%;
+}
+
+.colophon {
+	max-width: 1280px;
+	margin: 0 auto;
+	padding: 2rem var(--gutter) 3rem;
+	color: var(--bone-faint);
+	font-size: 0.85rem;
+}
+
+.colophon a {
+	color: var(--frost);
+}
+
+/* Must match COMPACT_QUERY in duel.svelte.ts. The extra foot padding clears MobileBar. */
+@media (max-width: 860px) {
+	.masthead {
+		flex-direction: column;
+	}
+
+	.colophon {
+		padding-bottom: 6rem;
+	}
+}
+
+/* A modal backdrop that centres its dialog. */
+.scrim {
+	position: fixed;
+	inset: 0;
+	z-index: 20;
+	background: rgba(0, 0, 0, 0.55);
+	display: grid;
+	place-items: center;
+	padding: 16px;
+}
+
 /* An italic prompt beside a control, e.g. "at" before a target list. */
 .field {
 	display: inline-flex;