:root {
  color-scheme: light dark;
  --bg: #f6f8f4;
  --card: #ffffff;
  --ink: #1a1c19;
  --muted: #52634f;
  --brand: #3f6b3f;
  --on-brand: #ffffff;
  --line: #dfe5db;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10140f;
    --card: #1a1f18;
    --ink: #e2e3dd;
    --muted: #b9ccb4;
    --brand: #a3d19c;
    --on-brand: #10240f;
    --line: #2b322a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 40px 32px;
  text-align: center;
  box-shadow: 0 12px 32px rgb(0 0 0 / 8%);
}
.mark { width: 56px; height: 56px; color: var(--brand); }
h1 {
  margin: 12px 0 8px;
  font-size: 34px;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.tagline { margin: 0 0 20px; color: var(--muted); }
.version {
  margin: 0 0 24px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.download {
  display: block;
  padding: 15px 24px;
  border-radius: 999px;
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 600;
  text-decoration: none;
}
.unavailable {
  margin: 0;
  padding: 15px 20px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  color: var(--muted);
}
.steps {
  margin: 28px 0 0;
  padding-left: 20px;
  text-align: left;
  color: var(--muted);
}
.steps li { margin-bottom: 8px; }
.steps b { color: var(--ink); font-weight: 600; }
.whats-new {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  text-align: left;
}
.whats-new h2 {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.whats-new p { margin: 0; font-size: 15px; }
.footer {
  margin: 28px 0 0;
  font-size: 13px;
  color: var(--muted);
}