/*
 * The playground, in the home page's look: a bold heading, one bar of style pills and actions, and two
 * floating sheets, the source and the report, each under a quiet file bar. The sheets carry the site's
 * one soft shadow (STY-48); the report renders in its own style inside.
 */

body[data-richview-page="playground"] {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font: 400 1rem / 1.5 var(--font-ui);
}
.pg {
	--font-display: "Bricolage Grotesque", "Geist", ui-sans-serif, system-ui, sans-serif;
	--ink-strong: #15130f;
	--measure: 1440px;
	--pad-x: max(var(--gutter), (100% - var(--measure)) / 2);
	display: flex;
	flex-direction: column;
	min-height: calc(100vh - var(--nav-h));
	padding: clamp(1.5rem, 5vh, 3.5rem) var(--pad-x) clamp(2rem, 6vh, 4rem);
	gap: 1rem;
}

/* ------------------------------------------------------------------ the heading */

.pg__head {
	display: grid;
	grid-template-columns: minmax(0, auto) minmax(0, 1fr);
	align-items: end;
	gap: 0.6rem clamp(1.5rem, 4vw, 4rem);
	margin-bottom: clamp(0.75rem, 2.5vh, 1.75rem);
}
.pg h1 {
	margin: 0;
	font: 600 clamp(2.9rem, 7.4vw, 6.6rem) / 0.92 var(--font-display);
	letter-spacing: -0.04em;
	color: var(--ink-strong);
}
.pg__lede {
	margin: 0 0 0.4rem;
	max-width: 30em;
	font-size: clamp(1.05rem, 1.3vw, 1.22rem);
	line-height: 1.45;
	color: var(--soft);
	text-wrap: pretty;
}

/* ------------------------------------------------------------------ the bar: styles and actions */

.pg__bar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem 1rem;
}
/* The five styles, each named in its own face (site.css), on one pill. */
.pg .themes__group {
	display: flex;
	flex-wrap: wrap;
	gap: 0.2rem;
	padding: 0.25rem;
	border: 1px solid var(--rule);
	border-radius: var(--r-pill);
	background: var(--panel);
}
.pg .themes__group button {
	font: 600 0.9rem / 1 var(--font-ui);
	color: var(--soft);
	background: none;
	border: 0;
	border-radius: var(--r-pill);
	padding: 0.55rem 0.95rem;
	cursor: pointer;
	transition: background-color 150ms var(--ease-out), color 150ms var(--ease-out);
}
.pg .themes__group button:hover {
	color: var(--ink);
	background: color-mix(in srgb, var(--ink) 6%, transparent);
}
.pg .themes__group button[aria-checked="true"] {
	color: var(--paper);
	background: var(--ink);
}
.pg__actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.45rem;
	margin-left: auto;
}
/* The actions are pills drawn in ink; the report's download, what most readers came for, is the blue one. */
.pg__actions button {
	min-height: 2.6rem;
	font: 600 0.92rem / 1.2 var(--font-ui);
	color: var(--ink);
	background: transparent;
	border: 1.5px solid color-mix(in srgb, var(--ink) 78%, transparent);
	border-radius: var(--r-pill);
	padding: 0.55rem 1.1rem;
	cursor: pointer;
	transition: background-color 150ms var(--ease-out), color 150ms var(--ease-out), border-color 150ms var(--ease-out);
}
.pg__actions button:hover {
	color: var(--paper);
	background: var(--ink);
	border-color: var(--ink);
}
.pg__actions #download-html {
	color: #fff;
	background: var(--blue);
	border-color: var(--blue);
}
.pg__actions #download-html:hover {
	background: var(--blue-ink);
	border-color: var(--blue-ink);
}
.pg .themes__group button:focus-visible,
.pg__actions button:focus-visible {
	outline: 2px solid var(--blue);
	outline-offset: 2px;
}
.pg__status {
	min-height: 1.2em;
	margin: 0;
	font-size: 0.9rem;
	color: var(--soft);
}

/* ------------------------------------------------------------------ the two sheets */

.pg__panes {
	flex: 1;
	display: grid;
	grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
	gap: clamp(1.25rem, 2.6vw, 2.5rem);
	min-height: 0;
	margin-top: 0.25rem;
}
.pg__source,
.pg__preview {
	min-width: 0;
	display: flex;
	flex-direction: column;
	border-radius: var(--r-panel);
	background: var(--panel);
	overflow: hidden;
}
/* The site's one soft shadow, for its floating sheets (STY-48). */
.pg .sheet--source,
.pg .sheet--report {
	border: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
	box-shadow: var(--shadow-float);
}
/* Each sheet's bar: the file, in the code face, and what it is. */
.pg__source label,
.pg__frame-bar {
	display: flex;
	align-items: center;
	gap: 0.6rem;
	margin: 0;
	padding: 0.7rem 1.1rem 0.65rem;
	border-bottom: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
	font: 400 0.84rem / 1.3 var(--font-ui);
	color: var(--soft);
}
.pg__file {
	font: 400 0.84rem / 1 var(--font-mono);
	color: var(--ink);
	padding: 0.32rem 0.6rem;
	border-radius: 4px;
	background: var(--paper-2);
}
.pg__frame-bar span {
	color: var(--faint);
}
.pg__source textarea {
	flex: 1;
	min-height: 22rem;
	/* Its padding inside its width: the end of every line stays in the pane. */
	box-sizing: border-box;
	width: 100%;
	resize: none;
	border: 0;
	padding: 1rem 1.1rem;
	background: transparent;
	color: var(--ink);
	caret-color: var(--blue);
	font: 400 13px / 22px var(--font-mono);
	tab-size: 2;
}
.pg__source textarea::selection {
	background: color-mix(in srgb, var(--blue) 22%, transparent);
}
.pg__source textarea:focus-visible {
	outline: 2px solid color-mix(in srgb, var(--blue) 45%, transparent);
	outline-offset: -2px;
}
#diagnostics {
	margin: 0;
	padding: 0.75rem 1.1rem;
	max-height: 25vh;
	overflow: auto;
	white-space: pre-wrap;
	border-top: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
	font: 400 0.78rem / 1.5 var(--font-mono);
	color: var(--soft);
	background: color-mix(in srgb, var(--paper-2) 60%, var(--panel));
}
#diagnostics:empty {
	display: none;
}
.pg__preview iframe {
	display: block;
	flex: 1;
	width: 100%;
	min-height: max(30rem, 64vh);
	border: 0;
	background: var(--paper-2);
}

/* ------------------------------------------------------------------ narrower screens */

@media (max-width: 899px) {
	.pg__head {
		grid-template-columns: minmax(0, 1fr);
	}
	.pg__panes {
		grid-template-columns: minmax(0, 1fr);
	}
	.pg__actions {
		margin-left: 0;
	}
	.pg__preview iframe {
		min-height: 70vh;
	}
}
/* A phone: the five styles share one row across the width, each in its own face. */
@media (max-width: 520px) {
	.pg .themes__group {
		flex: 1 1 100%;
		flex-wrap: nowrap;
		justify-content: space-between;
		gap: 0;
	}
	.pg .themes__group button {
		padding: 0.5rem 0.45rem;
		font-size: 0.8rem;
	}
	.pg__actions button {
		min-height: 2.4rem;
		padding: 0.45rem 0.85rem;
		font-size: 0.86rem;
	}
}
/* Narrower than one row holds: two even rows in a rounded box. */
@media (max-width: 359px) {
	.pg .themes__group {
		flex-wrap: wrap;
		justify-content: center;
		border-radius: var(--r-panel);
	}
}
@media (prefers-reduced-motion: reduce) {
	.pg .themes__group button,
	.pg__actions button {
		transition: none;
	}
}

/* The source editor uses the home editor's syntax and completion, within the existing sheet. */
.pg__code {
	--code-font: 400 13px / 22px var(--font-mono);
	position: relative;
	flex: 1;
	min-height: 22rem;
}
.pg__code .code__hl,
.pg__code .code__mirror,
.pg__code textarea {
	position: absolute;
	inset: 0;
	box-sizing: border-box;
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 1rem 1.1rem;
	font: var(--code-font);
	tab-size: 2;
	white-space: pre-wrap;
	overflow-wrap: break-word;
	letter-spacing: 0;
	font-variant-ligatures: none;
}
.pg__code .code__hl {
	display: none;
	overflow: hidden;
	pointer-events: none;
	color: var(--ink);
}
.pg__code .code__hl code { font: inherit; }
.pg__code.is-live .code__hl { display: block; }
.pg__code.is-live textarea {
	color: transparent;
	-webkit-text-fill-color: transparent;
}
.pg__code.is-live textarea::selection { -webkit-text-fill-color: transparent; }