:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #5f6b7a;
  --line: #e4e7eb;
  --accent: #7c6ee6;
  --accent-soft: #eeeafe;
  --ok: #2e7d5b;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  background: radial-gradient(circle at top left, var(--accent-soft), transparent 32rem), var(--bg);
  color: var(--text);
}

header, main, footer {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  padding: 56px 0 28px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.brand {
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-links a, .button {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}

.hero {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  box-shadow: 0 18px 48px rgba(31, 41, 51, 0.08);
}

h1, h2, h3 {
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  margin-top: 48px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

h3 { margin-top: 28px; }

p { margin: 12px 0; }

.lead {
  font-size: 1.14rem;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 28px 0;
}

.card, section.language-block {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  padding: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.86rem;
}

.notice {
  border-left: 4px solid var(--ok);
  padding: 12px 16px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border-radius: 14px;
}

ul { padding-left: 1.3rem; }

li { margin: 8px 0; }

.lang-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 32px;
}

.lang-nav a {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
}

.small {
  color: var(--muted);
  font-size: 0.94rem;
}

footer {
  padding: 48px 0 56px;
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101418;
    --card: #171c22;
    --text: #eef2f6;
    --muted: #a9b3c1;
    --line: #2c3642;
    --accent: #b3a7ff;
    --accent-soft: #24213d;
    --ok: #8bd7b4;
  }

  .hero { box-shadow: none; }
}