:root {
	color-scheme: light;
	--bg: #f7f8fc;
	--panel: #ffffff;
	--panel-border: #dfe5f0;
	--text: #172033;
	--muted: #5f6b85;
	--accent: #5b6cff;
	--accent-soft: #e8ebff;
	--accent-strong: #3550ff;
	--success: #167c5a;
	--error: #c44747;
	--shadow: 0 18px 45px rgba(54, 70, 108, 0.08);
	--radius: 20px;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	background:
		radial-gradient(circle at top right, rgba(91, 108, 255, 0.12), transparent 22rem),
		radial-gradient(circle at top left, rgba(57, 214, 187, 0.1), transparent 20rem),
		var(--bg);
	color: var(--text);
	font-family:
		Inter,
		ui-sans-serif,
		system-ui,
		-apple-system,
		BlinkMacSystemFont,
		"Segoe UI",
		sans-serif;
}

button,
input,
textarea {
	font: inherit;
}

code,
pre,
textarea {
	font-family:
		"SFMono-Regular",
		SFMono-Regular,
		ui-monospace,
		Menlo,
		Monaco,
		Consolas,
		"Liberation Mono",
		monospace;
}

.page-shell {
	max-width: 1200px;
	margin: 0 auto;
	padding: 32px 20px 48px;
}

.hero {
	display: grid;
	grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
	gap: 20px;
	align-items: stretch;
	margin-bottom: 24px;
}

.hero-copy,
.hero-note,
.panel {
	background: var(--panel);
	border: 1px solid var(--panel-border);
	border-radius: var(--radius);
	box-shadow: var(--shadow);
}

.hero-copy {
	padding: 32px;
}

.hero-note {
	padding: 24px;
	background: linear-gradient(180deg, #ffffff 0%, #f4f7ff 100%);
}

.eyebrow {
	margin: 0 0 12px;
	color: var(--accent-strong);
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	font-size: 0.8rem;
}

h1,
h2,
h3,
p {
	margin: 0;
}

h1 {
	font-size: clamp(2.25rem, 4vw, 3.25rem);
	line-height: 1.05;
	margin-bottom: 14px;
}

.hero-text,
.panel-copy,
.subtle-text,
.hero-note p {
	color: var(--muted);
	line-height: 1.6;
}

.hero-note-title {
	font-weight: 700;
	margin-bottom: 10px;
}

.layout {
	display: grid;
	grid-template-columns: 240px minmax(0, 1fr);
	gap: 20px;
}

.samples-panel,
.editor-panel,
.output-panel {
	padding: 22px;
}

.output-panel {
	grid-column: 1 / -1;
}

.panel-heading {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	gap: 16px;
	margin-bottom: 10px;
}

.panel-heading h2 {
	margin-bottom: 4px;
}

.samples-grid {
	display: grid;
	gap: 8px;
	margin-top: 18px;
}

.sample-button {
	width: 100%;
	padding: 10px 12px;
	border: 1px solid var(--panel-border);
	border-radius: 12px;
	background: #fff;
	text-align: left;
	cursor: pointer;
	transition:
		transform 120ms ease,
		border-color 120ms ease,
		box-shadow 120ms ease;
}

.sample-button:hover,
.sample-button:focus-visible {
	transform: translateY(-1px);
	border-color: rgba(91, 108, 255, 0.45);
	box-shadow: 0 12px 24px rgba(91, 108, 255, 0.12);
	outline: none;
}

.sample-button.is-selected {
	border-color: var(--accent);
	background: linear-gradient(180deg, #ffffff 0%, #eef1ff 100%);
}

.sample-title {
	display: block;
	font-weight: 700;
	font-size: 0.92rem;
	line-height: 1.35;
}

.playground-form {
	display: grid;
	gap: 16px;
}

.field-row {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 140px;
	gap: 14px;
}

.field {
	display: grid;
	gap: 8px;
}

.field span {
	font-size: 0.92rem;
	font-weight: 600;
}

input,
textarea {
	width: 100%;
	border: 1px solid var(--panel-border);
	border-radius: 14px;
	padding: 12px 14px;
	background: #fff;
	color: var(--text);
}

input:focus,
textarea:focus {
	border-color: rgba(91, 108, 255, 0.65);
	box-shadow: 0 0 0 4px rgba(91, 108, 255, 0.12);
	outline: none;
}

textarea {
	min-height: 420px;
	resize: vertical;
	line-height: 1.55;
	tab-size: 2;
}

.primary-button,
.secondary-button {
	border: 0;
	border-radius: 999px;
	padding: 10px 16px;
	cursor: pointer;
	font-weight: 700;
	transition:
		transform 120ms ease,
		box-shadow 120ms ease,
		opacity 120ms ease;
}

.primary-button {
	background: linear-gradient(135deg, var(--accent) 0%, #7a41ff 100%);
	color: #fff;
	box-shadow: 0 14px 26px rgba(91, 108, 255, 0.25);
}

.secondary-button {
	background: var(--accent-soft);
	color: var(--accent-strong);
}

.primary-button:hover,
.secondary-button:hover,
.primary-button:focus-visible,
.secondary-button:focus-visible {
	transform: translateY(-1px);
	outline: none;
}

.primary-button[disabled] {
	cursor: wait;
	opacity: 0.7;
	transform: none;
}

.editor-hint {
	margin-top: 14px;
	padding: 14px 16px;
	border-radius: 14px;
	background: #f5f7ff;
	color: var(--muted);
	line-height: 1.5;
}

.editor-hint span {
	display: block;
	font-weight: 700;
	color: var(--text);
	margin-bottom: 6px;
}

.result-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 16px;
	margin-top: 16px;
}

.result-card {
	border: 1px solid var(--panel-border);
	border-radius: 16px;
	padding: 16px;
	background: #fff;
}

.result-card h3 {
	margin-bottom: 12px;
	font-size: 1rem;
}

pre {
	margin: 0;
	min-height: 180px;
	max-height: 360px;
	overflow: auto;
	padding: 14px;
	border-radius: 14px;
	background: #0f1728;
	color: #ecf2ff;
	line-height: 1.5;
	font-size: 0.92rem;
	white-space: pre-wrap;
	word-break: break-word;
}

.status-success {
	color: var(--success);
}

.status-error {
	color: var(--error);
}

@media (max-width: 980px) {
	.hero,
	.layout,
	.result-grid {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 720px) {
	.page-shell {
		padding-inline: 14px;
	}

	.hero-copy,
	.hero-note,
	.panel {
		border-radius: 18px;
	}

	.field-row {
		grid-template-columns: 1fr;
	}

	textarea {
		min-height: 320px;
	}
}