*,
*::before,
*::after {
	box-sizing: border-box;
}

:root {
	color-scheme: dark;
	--bg: #0b0f14;
	--panel: #0f1620;
	--text: #e7edf5;
	--muted: #98a6b7;
	--border: rgba(255, 255, 255, 0.08);
}

html,
body {
	height: 100%;
	margin: 0;
	font-family:
		ui-sans-serif,
		system-ui,
		-apple-system,
		Segoe UI,
		Roboto,
		Arial;
	background: var(--bg);
	color: var(--text);
}

.app {
	min-height: 100%;
	display: grid;
	justify-items: center;
	align-content: start;
	padding: 18px 14px;
}

.shell {
	width: min(720px, 100%);
	display: grid;
	gap: 12px;
}

.header {
	text-align: center;
}

.title {
	margin: 0;
	font-size: 30px;
	letter-spacing: 0.2px;
}

.card {
	display: flex;
	flex-direction: column;
	gap: 12px;
	padding: 20px;
	border: 1px solid #444;
	border-radius: 12px;
}

h1,
p {
	margin: 0;
}

h2 {
	font-size: 22px;
}

p {
	color: var(--muted);
	line-height: 1.5;
}

button {
	margin: 6px 0 0;
	padding: 10px 14px;
	border: 1px solid var(--border);
	border-radius: 10px;
	background: #1a2330;
	color: var(--text);
	font-size: 16px;
	cursor: pointer;
}

button:hover {
	background: #243041;
}

.hide {
	display: none;
}

.answer {
	margin: 1rem 0;
	font-size: 1.25rem;
	font-weight: 600;
	text-align: center;
	min-height: 24px;
}