:root {
	color-scheme: dark;
}

body {
	margin: 0;
	min-height: 100vh;
	display: grid;
	place-items: center;
	padding: 2rem;
	font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
	background: radial-gradient(1200px 600px at 50% -10%, #1e2a4a, #0b0f1a 60%);
	color: #e8ecf5;
}

.card {
	text-align: center;
	max-width: 620px;
	padding: 2.5rem 2rem;
	border: 1px solid #ffffff1a;
	border-radius: 20px;
	background: #ffffff08;
}

h1 {
	font-size: clamp(2.5rem, 9vw, 4.5rem);
	margin: 0 0 0.25rem;
	color: #f1f5f9;
	letter-spacing: -0.02em;
}

.rule {
	width: 96px;
	height: 4px;
	margin: 0 auto 1.25rem;
	border-radius: 999px;
	background: linear-gradient(90deg, #7dd3fc, #a78bfa, #f472b6);
}

p {
	color: #c3cbdb;
	font-size: 1rem;
	line-height: 1.6;
	margin: 0.5rem 0;
}

button {
	margin-top: 1.5rem;
	padding: 0.6rem 1.2rem;
	font-size: 1rem;
	border-radius: 999px;
	border: 1px solid #ffffff33;
	background: #ffffff14;
	color: inherit;
	cursor: pointer;
}

button:hover {
	background: #ffffff26;
}

.out {
	min-height: 1.6rem;
	margin-top: 1rem;
	color: #7dd3fc;
}