:root {
  color-scheme: light dark;
  --font-sans: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --bg: oklch(1 0 0);
  --surface: oklch(0.968 0.004 100);
  --ink: oklch(0.17 0.006 100);
  --ink-2: oklch(0.42 0.008 100);
  --line: oklch(0.905 0.005 100);
  --accent: oklch(0.885 0.175 100);
  --on-accent: oklch(0.2 0.03 100);
  --gutter: 16px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(0.145 0 0);
    --surface: oklch(0.19 0.004 100);
    --ink: oklch(0.96 0.005 100);
    --ink-2: oklch(0.76 0.008 100);
    --line: oklch(0.26 0.004 100);
  }
}

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

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100dvh;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in oklch, var(--accent) 35%, transparent), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, color-mix(in oklch, var(--accent) 18%, transparent), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

.shell {
  width: min(100%, 42rem);
  margin: 0 auto;
  padding: calc(var(--safe-top) + 28px) 24px calc(var(--safe-bottom) + 48px);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: baseline;
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9375rem;
  color: var(--ink-2);
}

.topnav .brand {
  margin-right: auto;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.375rem;
  color: var(--ink);
  text-decoration: none;
}

.topnav .brand mark {
  padding: 0 0.12em;
  border-radius: 0.1em;
  background: var(--accent);
  color: var(--on-accent);
}

h1 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.25rem, 8vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

h2 {
  margin: 28px 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.015em;
}

p,
ul {
  color: var(--ink-2);
}

ul {
  padding-left: 1.2em;
}

li + li {
  margin-top: 0.4em;
}

.lede {
  font-size: 1.125rem;
  color: var(--ink);
}

.panel {
  margin-top: 28px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in oklch, var(--surface) 88%, transparent);
}

.footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--ink-2);
}