:root {
  --bg: #f7f6fb;
  --surface: rgba(255,255,255,0.88);
  --text: #23242a;
  --muted: #666b77;
  --accent: #5a5cf6;
  --border: rgba(90,92,246,0.12);
  --shadow: 0 20px 60px rgba(25, 28, 46, 0.10);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1320;
    --surface: rgba(21,26,41,0.84);
    --text: #f3f5fb;
    --muted: #b5bdd0;
    --accent: #8e90ff;
    --border: rgba(142,144,255,0.18);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.38);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(90,92,246,0.16), transparent 32%),
    radial-gradient(circle at top left, rgba(255,105,180,0.08), transparent 28%),
    var(--bg);
  line-height: 1.75;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  width: min(920px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 28px 24px;
}
.hero { margin-bottom: 18px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-weight: 700;
  color: var(--accent);
}
.brand-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #5a5cf6, #8e90ff);
  color: white;
  font-size: 22px;
  box-shadow: 0 10px 22px rgba(0,0,0,0.15);
}
h1, h2, h3 {
  line-height: 1.22;
  margin: 1.2em 0 0.56em;
}
h1 { font-size: clamp(2rem, 4vw, 2.9rem); margin-top: 0.2em; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.02rem; color: var(--text); }
p, li { color: var(--text); }
ul { padding-left: 1.25rem; }
nav.lang {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 18px;
}
nav.lang a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.5);
}
.footer {
  margin-top: 22px;
  font-size: 0.95rem;
  color: var(--muted);
}