:root {
  --bg: #f4f5f8;
  --card: #ffffff;
  --text: #1c1e24;
  --muted: #5c616e;
  --accent: #3b73e0;
  --up: #2eab5b;
  --border: rgba(0, 0, 0, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121318;
    --card: #1b1d24;
    --text: #eceef2;
    --muted: #9aa0ad;
    --accent: #4f8cff;
    --up: #3ecf6e;
    --border: rgba(255, 255, 255, 0.09);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 16px;
}
main {
  max-width: 680px;
  margin: 40px auto 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 40px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.07);
}
h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 1.12rem; margin: 28px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.ring {
  width: 52px; height: 52px; border-radius: 50%;
  border: 7px solid var(--up);
  display: inline-block; margin-bottom: 14px;
}
nav { margin-top: 18px; }
nav a { margin-right: 18px; }
footer {
  max-width: 680px; margin: 0 auto 32px;
  padding: 0 40px;
  color: var(--muted); font-size: 0.85rem;
}
footer .store-badge { display: inline-block; }
footer .store-badge img { height: 44px; width: auto; }
footer p { margin: 10px 0 0; }
ul { padding-left: 1.2em; }
code {
  background: var(--border); border-radius: 5px;
  padding: 1px 6px; font-size: 0.9em;
}