:root {
  --bg: #ffffff;
  --text: #1c1c1e;
  --muted: #5f6368;
  --accent: #1E7A99;
  --line: #e3e6ea;
  --card: #f5f8fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --text: #f2f2f4;
    --muted: #a3a8ae;
    --accent: #5BC0DE;
    --line: #2a2d31;
    --card: #1a1c1f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { margin-bottom: 28px; }
.app { color: var(--accent); font-weight: 600; text-decoration: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: var(--accent); }
.updated { color: var(--muted); margin: 0; }
.faq > li { margin-bottom: 20px; }
.faq > li > strong { display: block; margin-bottom: 4px; }
.faq p { margin-bottom: 8px; }
.faq ul { margin-top: 4px; }
.summary {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 20px;
  margin: 24px 0;
}
.summary p:last-child, .summary ul:last-child { margin-bottom: 0; }
footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
footer a { margin-right: 16px; }