:root {
	color-scheme: light dark;
	font-family: -apple-system,
	BlinkMacSystemFont,
	"Segoe UI",
	sans-serif;
	line-height: 1.6;
}

body {
	max-width: 760px;
	margin: 0 auto;
	padding: 48px 24px;
}

header {
	margin-bottom: 40px;
}

h1 {
	line-height: 1.2;
}

h2 {
	line-height: 1.3;
	padding-bottom: 8px;
}

h1, h2, h3, h4, h5, h6 {
	margin: 0;
}

p {
	margin: 8px 0 16px;
}

.subtitle {
	color: #666;
	font-size: 1.05rem;
}

.problem {
	border: 1px solid #ccc;
	border-radius: 8px;
	padding: 20px;
	margin: 24px 0;
}

dl {
	margin: 0;
}

dt {
	font-weight: 600;
	margin-top: 16px;
}

dt:first-child {
	margin-top: 0;
}

dd {
	margin: 4px 0 0;
	overflow-wrap: anywhere;
}

code {
	font-family: ui-monospace,
	SFMono-Regular,
	Menlo,
	Monaco,
	Consolas,
	monospace;
	font-size: 0.9em;
}