/* AutoAI Systems — blog / baza wiedzy. Branding spójny z landingiem. */
:root {
  --bg: #04060a;
  --bg-elev: #0a0f18;
  --bg-card: #0d1420;
  --border: #1a2434;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --text-faint: #64748b;
  --emerald: #10b981;
  --emerald-soft: #34d399;
  --blue: #3b82f6;
  --blue-soft: #60a5fa;
  --amber: #fbbf24;
  --radius: 14px;
  --radius-sm: 8px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}
h1 { font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 20px; }
h2 { font-size: clamp(1.4rem, 2.8vw, 1.9rem); margin: 48px 0 16px; }
h3 { font-size: clamp(1.1rem, 2vw, 1.3rem); margin: 28px 0 12px; }
p { color: var(--text-dim); margin-bottom: 16px; }
a { color: var(--emerald-soft); text-decoration: none; }
a:hover { color: var(--emerald); }
strong { color: var(--text); }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(4, 6, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: 820px; margin: 0 auto;
}
.logo {
  font-family: 'Space Grotesk', sans-serif; font-weight: 700;
  font-size: 1.1rem; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--emerald); box-shadow: 0 0 12px var(--emerald); }
.nav-cta {
  padding: 9px 18px; background: var(--emerald); color: #04060a;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem;
  transition: transform 0.15s;
}
.nav-cta:hover { color: #04060a; transform: translateY(-1px); }

/* ARTICLE */
main { max-width: 820px; margin: 0 auto; padding: 48px 24px 0; }
.breadcrumb { font-size: 0.85rem; color: var(--text-faint); margin-bottom: 24px; }
.breadcrumb a { color: var(--text-dim); }
.article-meta { font-size: 0.88rem; color: var(--text-faint); margin-bottom: 32px; }
.article-meta strong { color: var(--text-dim); }

article p { font-size: 1.06rem; }
article ul, article ol { color: var(--text-dim); margin: 0 0 18px 22px; }
article li { margin-bottom: 8px; font-size: 1.04rem; }

/* ANSWER BLOCK (40-60 słów, cytowalny) */
.answer {
  background: linear-gradient(135deg, rgba(16,185,129,0.09), rgba(59,130,246,0.05));
  border: 1px solid rgba(16,185,129,0.3);
  border-left: 4px solid var(--emerald);
  border-radius: var(--radius-sm);
  padding: 22px 26px; margin: 8px 0 36px;
}
.answer p { color: var(--text); font-size: 1.1rem; margin: 0; line-height: 1.65; }

/* TABLE */
.table-wrap { overflow-x: auto; margin: 8px 0 24px; }
table { width: 100%; border-collapse: collapse; font-size: 0.98rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); }
th { color: var(--text); font-family: 'Space Grotesk', sans-serif; font-weight: 600; background: var(--bg-elev); }
td { color: var(--text-dim); }

/* STAT highlight */
.stat { color: var(--amber); font-weight: 600; }
.est { font-size: 0.82rem; color: var(--text-faint); font-style: italic; }

/* CTA BOX */
.cta-box {
  background: var(--bg-card); border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius); padding: 32px; margin: 48px 0;
  text-align: center;
}
.cta-box h3 { margin-top: 0; }
.cta-box p { margin-bottom: 22px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; background: linear-gradient(135deg, var(--emerald), var(--emerald-soft));
  color: #04060a; border-radius: var(--radius-sm); font-weight: 700; font-size: 1rem;
  transition: transform 0.15s;
}
.btn-primary:hover { color: #04060a; transform: translateY(-2px); }

/* FAQ */
.faq { margin: 24px 0; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden;
}
.faq-item summary {
  padding: 18px 22px; cursor: pointer; font-weight: 600; color: var(--text);
  font-size: 1rem; list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.4rem; color: var(--emerald); font-weight: 300; transition: transform 0.2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body { padding: 0 22px 20px; color: var(--text-dim); font-size: 0.98rem; }

/* INTERLINKS */
.more {
  margin: 56px 0 0; padding-top: 32px; border-top: 1px solid var(--border);
}
.more h3 { margin-top: 0; }
.more-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.more-card {
  display: block; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 20px; transition: border-color 0.2s, transform 0.2s;
}
.more-card:hover { border-color: rgba(16,185,129,0.4); transform: translateY(-2px); }
.more-card span { display: block; font-size: 0.78rem; color: var(--blue-soft); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; }
.more-card strong { color: var(--text); font-size: 1.02rem; }

/* BLOG INDEX */
.hub-head { max-width: 820px; margin: 0 auto; padding: 56px 24px 16px; text-align: center; }
.hub-head p { max-width: 620px; margin: 12px auto 0; }
.hub-list { max-width: 820px; margin: 0 auto; padding: 24px 24px 0; display: grid; gap: 16px; }
.hub-item {
  display: block; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; transition: border-color 0.2s, transform 0.2s;
}
.hub-item:hover { border-color: rgba(16,185,129,0.4); transform: translateY(-2px); }
.hub-item h2 { margin: 0 0 8px; font-size: 1.25rem; }
.hub-item p { margin: 0; font-size: 0.98rem; }

/* FOOTER */
footer { margin-top: 80px; padding: 40px 0 32px; border-top: 1px solid var(--border); background: var(--bg-elev); }
.footer-inner { max-width: 820px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-inner p { font-size: 0.85rem; color: var(--text-faint); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-size: 0.88rem; }
.footer-bottom { max-width: 820px; margin: 24px auto 0; padding: 20px 24px 0; border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--text-faint); text-align: center; }

@media (max-width: 640px) {
  .more-grid { grid-template-columns: 1fr; }
  h2 { margin-top: 36px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}