:root {
  color-scheme: light dark;
  --bg: #0d1117;
  --fg: #e6edf3;
  --muted: #9ba3b4;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.15);
  --card-bg: #161b22;
  --border: #21262d;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8f9fb;
    --fg: #101828;
    --muted: #4c5462;
    --accent: #0059ff;
    --accent-soft: rgba(0, 89, 255, 0.08);
    --card-bg: #ffffff;
    --border: #e4e7ec;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-size: 16px;
  line-height: 1.7;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

header.page-header {
  margin-bottom: 2.5rem;
}

header.page-header h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin: 0 0 0.5rem;
}

header.page-header p.meta {
  margin: 0.25rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.85rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.85rem;
}

section.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 10px 35px rgba(15, 23, 42, 0.25);
}

section.card h2 {
  margin-top: 0;
  font-size: 1.35rem;
}

.faq-content p {
  margin: 0 0 1rem;
}

.faq-content ul,
.faq-content ol {
  padding-left: 1.5rem;
  margin: 0 0 1rem;
}

.faq-content a {
  color: var(--accent);
  text-decoration: none;
}

.faq-content a:hover {
  text-decoration: underline;
}

.meta-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  font-size: 0.95rem;
}

.meta-grid span {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag,
.keyword {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.65rem;
  border-radius: 12px;
  font-size: 0.82rem;
  border: 1px solid var(--border);
  color: var(--muted);
}

.tag {
  border-color: rgba(88, 166, 255, 0.4);
  color: var(--accent);
}

.language-switcher {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 2.5rem 0 0;
  font-size: 0.9rem;
}

.language-switcher a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  border: 1px solid transparent;
}

.language-switcher a.active {
  border-color: var(--accent);
  color: var(--accent);
}

footer.page-footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.category-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.category-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}

.category-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.category-card a {
  color: var(--accent);
  text-decoration: none;
}