:root {
  color-scheme: light dark;
  --bg: #f5f7fb;
  --card: rgba(255,255,255,0.92);
  --text: #162033;
  --muted: #5b6475;
  --accent: #2f7cf6;
  --border: rgba(22,32,51,0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --card: rgba(19,27,41,0.92);
    --text: #eef3fb;
    --muted: #a4afc1;
    --accent: #75a9ff;
    --border: rgba(255,255,255,0.08);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg) 82%, white 18%));
  color: var(--text);
  line-height: 1.6;
}
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}
.language-toggle {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 0 0 18px;
}
.language-toggle button {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
}
.language-toggle button.active {
  background: color-mix(in srgb, var(--accent) 18%, var(--card));
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  font-weight: 600;
}
h1, h2 { line-height: 1.2; margin: 0 0 12px; }
p { margin: 0 0 14px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.lang-pane.hidden { display: none; }
.hero, .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.06);
  margin-bottom: 18px;
}
.badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
ul { padding-left: 20px; margin: 0; }
li + li { margin-top: 8px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.note {
  font-size: 14px;
  color: var(--muted);
}
.footer {
  margin-top: 28px;
  font-size: 14px;
  color: var(--muted);
}