* { box-sizing: border-box; }
:root {
  color-scheme: light dark;
  --bg1: #f4f7ff;
  --bg2: #eefaf5;
  --card: rgba(255,255,255,.92);
  --text: #172033;
  --muted: #5e687a;
  --accent: #2d6cff;
  --border: rgba(23,32,51,.10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg1: #101725;
    --bg2: #111c19;
    --card: rgba(24,33,49,.94);
    --text: #f3f6fb;
    --muted: #bcc5d3;
    --accent: #7ea5ff;
    --border: rgba(255,255,255,.10);
  }
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(45,108,255,.10), transparent 30%),
    radial-gradient(circle at 90% 15%, rgba(34,211,107,.10), transparent 30%),
    linear-gradient(145deg, var(--bg1), var(--bg2));
  min-height: 100vh;
}
.container {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 64px;
}
.hero {
  padding: 30px 28px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--card);
  box-shadow: 0 16px 50px rgba(0,0,0,.07);
  margin-bottom: 22px;
}
.badge {
  display: inline-block;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(45,108,255,.12);
  color: var(--accent);
  font-weight: 700;
  font-size: .9rem;
  margin-bottom: 12px;
}
h1 { margin: 0 0 8px; font-size: clamp(2rem, 6vw, 3.2rem); }
.subtitle { margin: 0; color: var(--muted); font-size: 1.08rem; }
.updated { color: var(--muted); margin-bottom: 0; font-size: .95rem; }
section {
  margin: 16px 0;
  padding: 24px 26px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
}
h2 { margin-top: 0; font-size: 1.28rem; }
p, li { line-height: 1.68; }
a { color: var(--accent); }
.button {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  color: white;
  background: var(--accent);
  border-radius: 12px;
  padding: 12px 18px;
}
footer {
  text-align: center;
  color: var(--muted);
  padding-top: 20px;
  font-size: .92rem;
}