/* Scoped tutorial styles */
.polydbms-tutorial { --bg: #f8fafc; --card: #ffffff; --muted: #64748b; --text: #0f172a; --border: #e2e8f0; }
.polydbms-tutorial { font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; color: var(--text); }
.polydbms-tutorial .container { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }
.polydbms-tutorial .nav { position: sticky; top: 0; background: rgba(255,255,255,.85); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); z-index: 20; }
.polydbms-tutorial .nav-inner { height: 56px; display: flex; align-items: center; justify-content: space-between; }
.polydbms-tutorial a { color: inherit; text-decoration: none; }
.polydbms-tutorial a:hover { text-decoration: underline; }
.polydbms-tutorial .chips a { display: inline-flex; align-items: center; gap: .5rem; padding: .5rem .875rem; border: 1px solid var(--border); border-radius: 999px; background: var(--card); box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.polydbms-tutorial .hero { background: linear-gradient(#fff, var(--bg)); padding: 3rem 0 2rem; }
.polydbms-tutorial .grid { display: grid; gap: 1rem; }
@media (min-width: 900px) { .polydbms-tutorial .grid-2 { grid-template-columns: 1fr 1fr; } .polydbms-tutorial .grid-3 { grid-template-columns: 2fr 1fr; } }
.polydbms-tutorial h1 { font-size: clamp(1.8rem, 2.8vw, 3rem); line-height: 1.1; margin: .25rem 0 0; }
.polydbms-tutorial h2 { font-size: 1.5rem; margin: 0 0 .25rem; }
.polydbms-tutorial h3 { font-size: 1.1rem; margin: .5rem 0; }
.polydbms-tutorial p.muted, .polydbms-tutorial .muted { color: var(--muted); }
.polydbms-tutorial .card { border: 1px solid var(--border); border-radius: 16px; background: var(--card); padding: 1rem; }
.polydbms-tutorial table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.polydbms-tutorial th, .polydbms-tutorial td { padding: .75rem; text-align: left; border-top: 1px solid var(--border); }
.polydbms-tutorial thead th { background: #f1f5f9; border-top: 0; }
.polydbms-tutorial .footer { border-top: 1px solid var(--border); padding: 1.5rem 0; font-size: .95rem; color: var(--muted); }
.polydbms-tutorial .section { padding: 2rem 0; }
.polydbms-tutorial .badge { display:inline-block; padding: .25rem .5rem; border:1px solid var(--border); border-radius: 8px; font-size:.85rem; color: var(--muted); }
.polydbms-tutorial .section { scroll-margin-top: 80px; }
/* Speaker images */
.polydbms-tutorial .speaker-photo {
  width: 92px; height: 92px; border-radius: 14px; object-fit: cover; background: #e5e7eb;
  border: 1px solid #e2e8f0;
}
.polydbms-tutorial .speaker-photo.small {
  width: 56px; height: 56px; border-radius: 10px;
}
.polydbms-tutorial .speaker-photo.placeholder {
  display: inline-block;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}