:root {
  --bg: #f6f8f6;
  --card: #ffffff;
  --text: #14211b;
  --muted: #5b6b63;
  --accent: #23a26d;
  --accent-text: #ffffff;
  --border: #e3e9e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1511;
    --card: #14211b;
    --text: #e8f0eb;
    --muted: #9db0a6;
    --accent: #3cc488;
    --accent-text: #0c1511;
    --border: #22352b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 22px;
  color: inherit;
  text-decoration: none;
  margin-bottom: 32px;
}

.brand img {
  width: 36px;
  height: 36px;
}

h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 12px;
}

h2 {
  font-size: 18px;
  margin: 28px 0 8px;
}

p,
li {
  color: var(--text);
}

.muted {
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin: 20px 0;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 12px;
  text-decoration: none;
}

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

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

footer {
  margin-top: 48px;
  font-size: 14px;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  margin-right: 16px;
}