:root {
  --bg: #fbf8f6;
  --text: #1d1b2e;
  --muted: #5e5b72;
  --card: #ffffff;
  --line: #ebe6ef;
  --accent: #e9566f;
  --sky: linear-gradient(135deg, #2b2d7c 0%, #8b3f9a 38%, #f0627a 70%, #ffb24a 100%);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12111f;
    --text: #f2eff7;
    --muted: #aaa5bd;
    --card: #1c1a2e;
    --line: #2c2942;
    --accent: #ff8a66;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header {
  background: var(--sky);
  color: #fff;
  padding: 56px 16px 48px;
  text-align: center;
}
header img { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 8px 24px rgba(0,0,0,.25); }
header h1 { margin: 16px 0 4px; font-size: 40px; letter-spacing: -0.5px; }
header p { margin: 0; font-size: 19px; opacity: .92; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h2 { font-size: 24px; margin: 40px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }
p, li { color: var(--muted); }
strong { color: var(--text); }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 22px;
  margin: 16px 0;
}
.card p:first-child, .card h3:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
footer { text-align: center; color: var(--muted); font-size: 14px; padding: 0 16px 40px; }
nav { margin-top: 18px; }
nav a { color: #fff; margin: 0 10px; font-weight: 600; text-decoration: none; opacity: .95; }