:root {
	--bg: #fcfbf7;
	--paper: #fffdf8;
	--ink: #1f2937;
	--muted: #556070;
	--line: #ddd7c8;
	--accent: #0f4c5c;
	--accent-2: #8a4fff;
	--good: #1f7a4f;
	--warn: #9a6700;
	--soft: #f4efe2;
	--soft-2: #eef5f7;
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family:
		Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
		"Segoe UI", sans-serif;
	background: var(--bg);
	color: var(--ink);
	line-height: 1.65;
}

main {
	max-width: 860px;
	margin: 0 auto;
	padding: 40px 20px 80px;
}

article {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 18px;
	padding: 32px;
	box-shadow: 0 18px 55px rgba(31, 41, 55, 0.06);
}

h1,
h2,
h3 {
	line-height: 1.2;
	margin-top: 1.5em;
}

h1 {
	font-size: 2.1rem;
	margin-top: 0;
}

h2 {
	font-size: 1.35rem;
	border-top: 1px solid var(--line);
	padding-top: 1rem;
}

h3 {
	font-size: 1.02rem;
}

p,
ul,
ol,
table,
blockquote,
details,
.quiz,
.callout,
.card-grid {
	margin: 1rem 0;
}

a {
	color: var(--accent);
}

header.hero {
	margin-bottom: 1.2rem;
}

header.hero p.kicker {
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--accent);
	font-weight: 700;
	font-size: 0.78rem;
	margin: 0 0 0.5rem;
}

.meta,
.small {
	color: var(--muted);
	font-size: 0.95rem;
}

.callout {
	background: var(--soft);
	border-left: 4px solid var(--accent);
	padding: 14px 16px;
	border-radius: 10px;
}

.callout.good {
	border-left-color: var(--good);
	background: #eef8f1;
}

.callout.warn {
	border-left-color: var(--warn);
	background: #fff7e6;
}

.card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 14px;
}

.card {
	border: 1px solid var(--line);
	border-radius: 14px;
	padding: 14px;
	background: white;
}

.card h3 {
	margin-top: 0;
}

table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.95rem;
}

th,
td {
	border: 1px solid var(--line);
	padding: 10px;
	vertical-align: top;
}

th {
	background: var(--soft-2);
	text-align: left;
}

blockquote {
	border-left: 4px solid var(--accent-2);
	margin-left: 0;
	padding: 8px 16px;
	background: #f6f2ff;
	border-radius: 10px;
}

code,
kbd {
	font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: 0.93em;
}

nav.lesson-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-bottom: 1rem;
}

nav.lesson-nav a {
	text-decoration: none;
	border: 1px solid var(--line);
	padding: 7px 10px;
	border-radius: 999px;
	background: white;
}

.quiz {
	border: 1px solid var(--line);
	border-radius: 16px;
	padding: 18px;
	background: #fff;
}

.quiz fieldset {
	border: 0;
	padding: 0;
	margin: 0 0 1rem;
}

.quiz legend {
	font-weight: 700;
	margin-bottom: 0.4rem;
}

.quiz label {
	display: block;
	padding: 6px 0;
}

.quiz button {
	border: 0;
	background: var(--accent);
	color: white;
	border-radius: 10px;
	padding: 10px 14px;
	cursor: pointer;
	font-weight: 700;
}

.quiz .result {
	margin-top: 0.9rem;
	padding: 10px 12px;
	border-radius: 10px;
	background: var(--soft-2);
}

footer {
	margin-top: 2rem;
	padding-top: 1rem;
	border-top: 1px solid var(--line);
}

.track-grid,
.link-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 16px;
	margin: 1rem 0;
}

.track,
.link-card {
	border: 1px solid var(--line);
	border-radius: 16px;
	padding: 16px;
	background: white;
}

.track h3,
.link-card h3 {
	margin-top: 0;
}

.pill {
	display: inline-block;
	padding: 0.2rem 0.55rem;
	border-radius: 999px;
	background: var(--soft-2);
	border: 1px solid var(--line);
	font-size: 0.82rem;
	color: var(--muted);
	margin-right: 0.35rem;
	margin-bottom: 0.35rem;
}

.checklist li,
.step-list li {
	margin: 0.45rem 0;
}

.two-col {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 16px;
}

footer .print-note,
.print-note {
	color: var(--muted);
	font-size: 0.9rem;
}

textarea,
input[type="text"],
input[type="number"] {
	width: 100%;
	border: 1px solid var(--line);
	border-radius: 10px;
	padding: 10px 12px;
	font: inherit;
	background: white;
}

hr.dinkus {
	border: 0;
	border-top: 1px solid var(--line);
	margin: 2rem 0;
}

@media print {
	body {
		background: white;
	}

	main {
		max-width: none;
		padding: 0;
	}

	article {
		box-shadow: none;
		border: 0;
		padding: 0;
	}

	nav.lesson-nav,
	.quiz button {
		display: none;
	}
}