/* Level: marketing + legal site.
 *
 * Static, no build step. Brand tokens mirror the iOS/macOS app's
 * Apple-native palette (Sources/LevelCore/Design/Colors.swift):
 *   ink0 (canvas)  #F2F2F7 light / #1C1C1E dark   → --bg
 *   ink1 (card)    #FFFFFF light / #2C2C2E dark   → --surface
 *   accent         systemBlue #007AFF / #0A84FF   → --accent
 * Type is the system stack (SF Pro on Apple platforms), matching the
 * app's move to native fonts. No bundled webfonts → zero render-blocking. */

:root {
	--bg: #F2F2F7;
	--surface: #FFFFFF;
	--text: #1D1D1F;
	--text-2: #6E6E73;
	--text-3: #8E8E93;
	--accent: #007AFF;
	--accent-press: #0061D1;
	--border: rgba(0, 0, 0, 0.08);
	--shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.04);
	--radius: 20px;
	--radius-sm: 12px;
	--maxw: 1000px;
	--ease: cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #1C1C1E;
		--surface: #2C2C2E;
		--text: #F5F5F7;
		--text-2: #AEAEB2;
		--text-3: #8E8E93;
		--accent: #0A84FF;
		--accent-press: #409CFF;
		--border: rgba(255, 255, 255, 0.12);
		--shadow: none;
	}
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
	font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
		system-ui, Roboto, Helvetica, Arial, sans-serif;
	background: var(--bg);
	color: var(--text);
	line-height: 1.5;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-press); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ─── Top nav ───────────────────────────────────────────────── */
.nav {
	position: sticky; top: 0; z-index: 10;
	background: color-mix(in srgb, var(--bg) 82%, transparent);
	backdrop-filter: saturate(180%) blur(20px);
	-webkit-backdrop-filter: saturate(180%) blur(20px);
	border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: inline-flex; align-items: baseline; color: var(--text); }
.brand-name { font-style: italic; font-weight: 500; font-size: 23px; letter-spacing: -0.01em; }
.brand-dot { color: var(--accent); }
.nav-links { display: flex; gap: 22px; align-items: center; font-size: 15px; }
.nav-links a { color: var(--text-2); }
.nav-links a:hover { color: var(--text); }
/* nav download button — scoped (0,2,0) so it wins over .nav-links a (0,1,1) */
.nav-links .store {
	display: inline-flex; align-items: center; gap: 7px;
	background: var(--accent); color: #fff; font-weight: 600;
	padding: 8px 16px; border-radius: 980px;
	transition: background 0.18s var(--ease), transform 0.18s var(--ease);
}
.nav-links .store:hover { background: var(--accent-press); color: #fff; transform: translateY(-1px); }
.nav-links .store:active { transform: translateY(0); }
.nav-links .store svg { width: 15px; height: 15px; fill: currentColor; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
	display: inline-flex; align-items: center; gap: 8px;
	background: var(--accent); color: #fff;
	font-size: 16px; font-weight: 600;
	padding: 13px 26px; border-radius: 980px;
	transition: background 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:hover { background: var(--accent-press); color: #fff; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 18px; height: 18px; fill: currentColor; }

/* ─── Hero ──────────────────────────────────────────────────── */
.hero { padding: 64px 0 56px; }
.hero-grid { display: grid; gap: 32px; align-items: center; }
.hero-copy { text-align: center; }
.hero h1 {
	font-size: clamp(38px, 7vw, 62px); font-weight: 700;
	letter-spacing: -0.03em; line-height: 1.05; max-width: 15ch;
	margin: 0 auto 20px;
}
.hero .lede {
	font-size: clamp(17px, 2.4vw, 21px); color: var(--text-2);
	max-width: 40ch; margin: 0 auto 30px; line-height: 1.45;
}
.hero-cta { display: flex; justify-content: center; }
.eyebrow {
	text-transform: uppercase; letter-spacing: 0.14em; font-size: 13px;
	font-weight: 600; color: var(--accent); margin-bottom: 18px;
}

/* ─── Device mockup (phone bezel around an app screenshot) ────── */
.device {
	width: 100%; max-width: 268px; margin: 0 auto;
	background: #0B0B0C; padding: 8px 8px 0; border-radius: 42px 42px 0 0;
	box-shadow: 0 22px 50px rgba(0, 0, 0, 0.18), 0 6px 14px rgba(0, 0, 0, 0.10);
	-webkit-mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
	mask-image: linear-gradient(to bottom, #000 80%, transparent 100%);
}
.device img { display: block; width: 100%; height: auto; border-radius: 34px; }
@media (prefers-color-scheme: dark) {
	.device { box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.07), 0 26px 60px rgba(0, 0, 0, 0.55); }
}

/* ─── Sections ──────────────────────────────────────────────── */
section { padding: 56px 0; }
.section-head { text-align: center; max-width: 60ch; margin: 0 auto 44px; }
.section-head h2 {
	font-size: clamp(28px, 4vw, 40px); font-weight: 700;
	letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 14px;
}
.section-head p { font-size: 18px; color: var(--text-2); }

/* card grid */
.grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .grid { grid-template-columns: 1fr; } }

.card {
	background: var(--surface); border: 1px solid var(--border);
	border-radius: var(--radius); padding: 28px;
	box-shadow: var(--shadow);
}
.card h3 { font-size: 20px; font-weight: 650; letter-spacing: -0.01em; margin-bottom: 10px; }
.card p { color: var(--text-2); font-size: 15.5px; }
.card .num {
	display: inline-flex; align-items: center; justify-content: center;
	width: 34px; height: 34px; border-radius: 10px;
	background: color-mix(in srgb, var(--accent) 14%, transparent);
	color: var(--accent); font-weight: 700; font-size: 16px; margin-bottom: 16px;
}

/* feature band (full-width tinted) */
.band { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.band-grid { display: grid; gap: 32px; align-items: center; }
.band-copy { text-align: center; }
.band .lead { font-size: clamp(22px, 3.2vw, 30px); font-weight: 600; letter-spacing: -0.02em; max-width: 22ch; line-height: 1.2; }
.band .body { color: var(--text-2); font-size: 18px; max-width: 52ch; margin-top: 16px; }
.band-copy .lead, .band-copy .body { margin-left: auto; margin-right: auto; }

/* "what we don't do" list */
.nots { display: grid; gap: 14px; max-width: 720px; margin: 0 auto; }
.not {
	display: flex; gap: 14px; align-items: flex-start;
	background: var(--surface); border: 1px solid var(--border);
	border-radius: var(--radius-sm); padding: 18px 20px;
}
.not .mark { color: var(--accent); font-weight: 700; flex-shrink: 0; }
.not strong { font-weight: 650; }
.not span.t { color: var(--text-2); }

/* closing CTA */
.cta { text-align: center; padding: 80px 0; }
.cta h2 { font-size: clamp(30px, 4.5vw, 46px); font-weight: 700; letter-spacing: -0.025em; margin-bottom: 28px; }

/* ─── Legal / content pages ─────────────────────────────────── */
.doc { max-width: 760px; margin: 0 auto; padding: 56px 0 96px; }
.doc h1 { font-size: clamp(32px, 5vw, 44px); font-weight: 700; letter-spacing: -0.025em; margin-bottom: 8px; }
.doc .updated { color: var(--text-3); font-size: 15px; margin-bottom: 36px; }
.doc h2 { font-size: 24px; font-weight: 650; letter-spacing: -0.015em; margin: 40px 0 12px; }
.doc h3 { font-size: 18px; font-weight: 650; margin: 24px 0 8px; }
.doc p, .doc li { color: var(--text); font-size: 16.5px; line-height: 1.65; }
.doc p { margin-bottom: 14px; }
.doc ul, .doc ol { margin: 0 0 16px 22px; }
.doc li { margin-bottom: 8px; }
.doc .muted { color: var(--text-2); }
.doc a { text-decoration: underline; text-underline-offset: 2px; }
.doc table { width: 100%; border-collapse: collapse; margin: 8px 0 22px; font-size: 15px; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc th { color: var(--text-2); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.callout {
	background: color-mix(in srgb, var(--accent) 8%, var(--surface));
	border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
	border-radius: var(--radius-sm); padding: 16px 18px; margin: 0 0 28px;
	font-size: 15px; color: var(--text-2);
}
.callout strong { color: var(--text); }

/* ─── Footer ────────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); padding: 40px 0; margin-top: 24px; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; justify-content: space-between; }
.footer .links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer a { color: var(--text-2); font-size: 15px; }
.footer a:hover { color: var(--text); }
.footer .copy { color: var(--text-3); font-size: 14px; }

/* ─── Responsive: two-column hero + band on wider viewports ───── */
@media (min-width: 861px) {
	.hero { padding: 88px 0 80px; }
	.hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: 56px; }
	.hero-copy { text-align: left; }
	.hero h1 { margin-left: 0; margin-right: 0; }
	.hero .lede { margin-left: 0; margin-right: 0; }
	.hero-cta { justify-content: flex-start; }
	.device { max-width: 300px; }
	.band-grid { grid-template-columns: 0.8fr 1.2fr; gap: 56px; }
	.band-copy { text-align: left; }
	.band-copy .lead, .band-copy .body { margin-left: 0; margin-right: 0; }
}

/* ─── Responsive: tighten nav on small screens ───────────────── */
@media (max-width: 600px) {
	.nav-links { gap: 14px; }
	.nav-links a[href="#how"] { display: none; }
}