:root {
	color-scheme: light dark;
	--blue: #0a66c2;
	--blue-dark: #004182;
	--ink: #1d2327;
	--surface: #fff;
	--surface-soft: #f3f6f9;
	--line: #dce3ea;
	--muted: #5b6b7b;
	--content-width: 960px;
	--space-1: 0.375rem;
	--space-2: 0.75rem;
	--space-3: 1rem;
	--space-4: 1.5rem;
	--space-5: 2rem;
	--radius-card: 0.875rem;
}

@media (prefers-color-scheme: dark) {
	:root {
		--ink: #e7edf3;
		--surface: #0f1720;
		--surface-soft: #16212e;
		--line: #26333f;
		--muted: #9fb0c0;
	}
}

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

html { scroll-behavior: smooth; scroll-padding-top: 6rem; }

body {
	margin: 0;
	font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	color: var(--ink);
	background: var(--surface);
	line-height: 1.6;
}

a { color: var(--blue); }
a:hover { color: var(--blue-dark); }

.wrap {
	width: min(100% - 2.5rem, var(--content-width));
	margin-inline: auto;
}

header.nav {
	position: sticky;
	top: 0;
	z-index: 100;
	background: var(--surface);
	border-bottom: 1px solid var(--line);
	box-shadow: 0 2px 10px rgba( 15, 23, 32, 0.06 );
}

.nav-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-4);
	padding-block: var(--space-3);
}

section[id] { scroll-margin-top: 6rem; }

.brand { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; }
.brand span { color: var(--blue); }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-4); }
nav a { color: var(--muted); font-size: 0.9rem; text-decoration: none; }
nav a:hover { color: var(--ink); }

.btn {
	display: inline-flex;
	min-height: 2.9rem;
	align-items: center;
	justify-content: center;
	padding: 0.75rem 1.4rem;
	border: 1px solid var(--blue);
	border-radius: 999px;
	background: var(--blue);
	color: #fff;
	font-weight: 650;
	text-align: center;
	text-decoration: none;
}
.btn:hover { background: var(--blue-dark); color: #fff; }
.btn.ghost { background: transparent; color: var(--blue); }

.tiny { margin-top: var(--space-2); color: var(--muted); font-size: 0.82rem; }

section { padding-block: clamp(2.5rem, 6vw, 3.5rem); border-top: 1px solid var(--line); }
section h2 { margin: 0 0 var(--space-4); font-size: clamp(1.5rem, 3vw, 1.8rem); letter-spacing: -0.02em; }

.grid,
.tiers { display: grid; gap: var(--space-4); }

.card,
.tier {
	min-width: 0;
	padding: var(--space-4);
	border: 1px solid var(--line);
	border-radius: var(--radius-card);
	background: var(--surface-soft);
}
.card h3 { margin: 0 0 var(--space-1); font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }
.tier.pro { border-color: var(--blue); }
.tier h3 { margin: 0 0 var(--space-1); font-size: 1.25rem; }
.tier .price { margin-bottom: var(--space-3); color: var(--muted); }
.tier ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.tier li + li { margin-top: var(--space-1); }

ol.steps { counter-reset: steps; list-style: none; margin: 0; padding: 0; }
ol.steps li { position: relative; min-height: 2rem; padding: 0 0 var(--space-4) 2.75rem; }
ol.steps li::before {
	position: absolute;
	left: 0;
	top: 0;
	display: grid;
	width: 1.9rem;
	height: 1.9rem;
	place-items: center;
	border-radius: 50%;
	background: var(--blue);
	color: #fff;
	content: counter(steps);
	counter-increment: steps;
	font-size: 0.875rem;
	font-weight: 700;
}

code,
pre { border: 1px solid var(--line); border-radius: 0.5rem; background: var(--surface-soft); }
code { padding: 0.1rem 0.4rem; overflow-wrap: anywhere; font-size: 0.85em; }
pre { padding: var(--space-3) var(--space-4); overflow-x: auto; font-size: 0.82rem; }

footer { border-top: 1px solid var(--line); padding-block: var(--space-5); color: var(--muted); text-align: center; }

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
}

/* Wider screens */
@media (min-width: 641px) {
	.hero { padding: clamp(4rem, 9vw, 6rem) 0 3rem; text-align: center; }
	.hero h1 { margin: 0 0 1rem; font-size: clamp(2.75rem, 5vw, 3.5rem); line-height: 1.08; letter-spacing: -0.04em; }
	.hero p.lead { max-width: 40rem; margin: 0 auto 1.75rem; color: var(--muted); font-size: 1.2rem; }
	.hero .btn + .btn { margin-left: 0.5rem; }
	.grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
	.tiers { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.download-actions { margin-top: 1.25rem; }
}

/* Narrow screens */
@media (max-width: 640px) {
	.wrap { width: min(100% - 2rem, var(--content-width)); }
	.nav-inner { align-items: flex-start; flex-direction: column; gap: 0.75rem; padding-block: 1rem; }
	nav { width: 100%; gap: 0.5rem 1rem; }
	nav a { padding-block: 0.25rem; }
	.hero { padding: 2.75rem 0 2rem; text-align: left; }
	.hero h1 { margin: 0 0 1rem; font-size: clamp(2.1rem, 10vw, 2.75rem); line-height: 1.08; letter-spacing: -0.04em; }
	.hero p.lead { margin: 0 0 1.5rem; color: var(--muted); font-size: 1.05rem; }
	.hero .btn { width: 100%; }
	.hero .btn + .btn { margin-top: 0.65rem; }
	.grid,
	.tiers { grid-template-columns: minmax(0, 1fr); gap: 0.875rem; }
	.card,
	.tier { padding: 1.125rem; }
	.tier .price { line-height: 1.5; }
	section { padding-block: 2.25rem; }
	section h2 { margin-bottom: 1.125rem; }
	.download-actions .btn { width: 100%; }
	footer { text-align: left; }
}