:root {
  --bg: #F2F5FA;
  --card: #FFFFFF;
  --text: #121420;
  --muted: #6B7080;
  --line: rgba(0, 0, 0, 0.08);
  --accent: #5A7A00;
  --mark: #D9FF43;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D1017;
    --card: #161A23;
    --text: #F2F4FA;
    --muted: #8A90A3;
    --line: rgba(255, 255, 255, 0.08);
    --accent: #D9FF43;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

header a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

header img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

h1 {
  font-size: 32px;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin: 32px 0 8px;
}

p, li { margin: 0 0 12px; }

ul { padding-left: 22px; }

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

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  margin: 24px 0;
}

.card p:last-child { margin-bottom: 0; }

.links {
  list-style: none;
  padding: 0;
}

.links a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 18px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 15px;
}