* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
	min-height: 100%;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	background: #f4f6f8;
	color: #1f2933;
	line-height: 1.5;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
	min-height: 100vh;
}

main {
	background: #ffffff;
	padding: 48px 40px;
	border-radius: 8px;
	box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
	max-width: 520px;
	width: 100%;
	text-align: center;
}

h1 {
	font-size: 1.75rem;
	margin-bottom: 16px;
	color: #102a43;
}

.lead {
	margin-bottom: 32px;
	color: #486581;
}

.download-btn {
	display: inline-block;
	background: #0b6ec7;
	color: #ffffff;
	text-decoration: none;
	padding: 18px 36px;
	border-radius: 6px;
	font-size: 1.15rem;
	font-weight: 600;
	transition: background-color 0.15s ease-in-out, transform 0.05s ease-in-out;
}

.download-btn:hover,
.download-btn:focus {
	background: #095aa1;
}

.download-btn:active {
	transform: translateY(1px);
}

.hint {
	margin-top: 28px;
	font-size: 0.95rem;
	color: #486581;
}

footer {
	margin-top: 40px;
	padding-top: 20px;
	border-top: 1px solid #e4e7eb;
	font-size: 0.85rem;
	color: #829ab1;
}

footer a {
	color: inherit;
	text-decoration: none;
}

footer a:hover {
	text-decoration: underline;
}

@media (max-width: 480px) {
	main { padding: 32px 24px; }
	h1 { font-size: 1.5rem; }
	.download-btn { padding: 16px 28px; font-size: 1.05rem; width: 100%; }
}