:root {
  --ink: #16181d;
  --muted: #5a6070;
  --line: #e3e5ea;
  --paper: #ffffff;
  --wash: #f5f6f8;
  --accent: #1f5eff;
  --accent-ink: #ffffff;
  --radius: 10px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eceef2;
    --muted: #a3a9b6;
    --line: #2b2f37;
    --paper: #121418;
    --wash: #1a1d22;
    --accent: #6f97ff;
    --accent-ink: #0d0f12;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

header.site {
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
nav.site a { color: var(--muted); text-decoration: none; margin-left: 18px; }
nav.site a:hover { color: var(--ink); }

.hero { padding: 64px 0 40px; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.01em; }
.hero p.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 28px; max-width: 40rem; }

.button {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
  border: 0;
  font: inherit;
}
.button[aria-disabled="true"] {
  background: var(--wash);
  color: var(--muted);
  border: 1px solid var(--line);
  cursor: default;
}

section { padding: 32px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 1.45rem; margin: 0 0 12px; }

.steps { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); padding: 0; margin: 0; list-style: none; }
.steps li { background: var(--wash); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.steps strong { display: block; margin-bottom: 4px; }

.plans { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.plan { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.plan h3 { margin: 0 0 4px; }
.plan .price { font-size: 1.5rem; font-weight: 700; margin: 0 0 10px; }
.plan ul { padding-left: 18px; margin: 0; }

.note { color: var(--muted); font-size: 0.95rem; }

.prose h1 { font-size: 2rem; margin: 48px 0 8px; }
.prose h2 { font-size: 1.25rem; margin: 28px 0 8px; }
.prose { padding-bottom: 48px; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 0.95rem; }
footer.site a { color: var(--muted); margin-right: 16px; }

@media (max-width: 520px) {
  nav.site a { margin-left: 12px; }
  .hero { padding-top: 40px; }
}