/* One stylesheet for the whole site. No frameworks and no downloaded fonts —
   these pages have to keep working, untouched, for years. */
:root {
	--ink: #14161a;
	--muted: #656b74;
	--faint: #9aa1ab;
	--line: #e6e8ec;
	--page: #ffffff;
	--panel: #f7f8fa;
	--accent: #1f7a4d;
	--accent-soft: #e8f3ed;
	--radius: 18px;
}

@media (prefers-color-scheme: dark) {
	:root {
		--ink: #f4f5f7;
		--muted: #9ba2ac;
		--faint: #6d747e;
		--line: #26292e;
		--page: #0f1113;
		--panel: #16191c;
		--accent: #3fbf7d;
		--accent-soft: #14271e;
	}
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	margin: 0;
	padding: 0 24px 96px;
	background: var(--page);
	color: var(--ink);
	font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	-webkit-font-smoothing: antialiased;
	-webkit-text-size-adjust: 100%;
}

.wrap { max-width: 50rem; margin: 0 auto; }
.narrow { max-width: 42rem; }

/* ---- header ---- */

header.site {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 30px 0 10px;
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 11px;
	text-decoration: none;
	color: inherit;
	font-weight: 640;
	letter-spacing: -0.015em;
}

.mark {
	width: 30px;
	height: 30px;
	border-radius: 9px;
	background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #0a4d78));
	position: relative;
	flex: none;
}

.mark::after {
	content: "";
	position: absolute;
	inset: 9px;
	border-radius: 3px;
	background: var(--page);
	clip-path: polygon(0 55%, 38% 55%, 38% 0, 62% 0, 62% 100%, 100% 100%, 100% 45%, 62% 45%);
	opacity: 0.92;
}

nav { margin-left: auto; display: flex; gap: 22px; font-size: 0.95rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--ink); }

/* ---- hero ---- */

.hero { padding: 72px 0 24px; position: relative; }

.hero::before {
	content: "";
	position: absolute;
	top: -80px;
	left: -18%;
	width: 62%;
	height: 340px;
	background: radial-gradient(
		closest-side,
		color-mix(in srgb, var(--accent) 22%, transparent),
		transparent
	);
	filter: blur(14px);
	pointer-events: none;
	z-index: -1;
}

h1 {
	font-size: clamp(2.3rem, 7vw, 3.6rem);
	line-height: 1.04;
	letter-spacing: -0.035em;
	margin: 0 0 18px;
	font-weight: 680;
}

.lead {
	font-size: clamp(1.1rem, 2.6vw, 1.3rem);
	line-height: 1.5;
	color: var(--muted);
	margin: 0;
	max-width: 34rem;
}

h2 {
	font-size: 0.82rem;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--faint);
	font-weight: 640;
	margin: 76px 0 20px;
}

h3 { font-size: 1.1rem; letter-spacing: -0.015em; margin: 0 0 4px; }
p { margin: 0 0 16px; }
a { color: var(--accent); text-underline-offset: 3px; }

/* ---- product card ---- */

.product {
	display: flex;
	gap: 20px;
	align-items: flex-start;
	padding: 24px;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: var(--panel);
	text-decoration: none;
	color: inherit;
	transition: border-color 0.15s ease, transform 0.15s ease;
}

.product:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); transform: translateY(-1px); }

.icon {
	width: 62px;
	height: 62px;
	border-radius: 15px;
	flex: none;
	display: grid;
	place-items: center;
	font-size: 30px;
	background: linear-gradient(160deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #0d5c8a));
	color: #fff;
}

.product .meta { color: var(--muted); font-size: 0.96rem; margin: 0; }
.tag {
	display: inline-block;
	margin-top: 10px;
	font-size: 0.78rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--accent);
	background: var(--accent-soft);
	padding: 3px 9px;
	border-radius: 100px;
	font-weight: 600;
}

/* ---- principles ---- */

.beliefs { display: grid; gap: 2px; }
.beliefs > div { padding: 20px 0; border-top: 1px solid var(--line); }
.beliefs > div:first-child { border-top: 0; }
.beliefs p { color: var(--muted); margin: 0; }

/* ---- long-form pages ---- */

.doc h2 {
	font-size: 1.22rem;
	text-transform: none;
	letter-spacing: -0.015em;
	color: var(--ink);
	margin: 38px 0 10px;
}
.doc h3 { font-size: 1.02rem; margin: 26px 0 6px; }
.doc ul { padding-left: 1.15rem; }
.doc li { margin-bottom: 7px; }
.date { color: var(--faint); font-size: 0.92rem; margin-top: -8px; }

.panel {
	background: var(--panel);
	border: 1px solid var(--line);
	border-radius: 14px;
	padding: 18px 20px;
	margin: 24px 0;
}
.panel p:last-child { margin-bottom: 0; }

footer {
	margin-top: 84px;
	padding-top: 22px;
	border-top: 1px solid var(--line);
	color: var(--faint);
	font-size: 0.88rem;
	display: flex;
	flex-wrap: wrap;
	gap: 6px 18px;
}
footer a { color: var(--faint); text-decoration: none; }
footer a:hover { color: var(--ink); }
footer .spacer { margin-left: auto; }