/* Modern Digital — SaaS, rounded, gradient hero, dense cards */
.theme-digital {
  font-family: "Instrument Sans", system-ui, sans-serif;
}
.theme-digital .nb-body { background: radial-gradient(1200px 500px at 10% -10%, color-mix(in srgb, var(--nb-secondary) 18%, transparent), transparent), var(--bg); }
.theme-digital .hero {
  grid-template-columns: 1fr;
  text-align: center;
  padding: 5.5rem 1.25rem 3rem;
}
.theme-digital .hero h1 {
  font-family: "Instrument Sans", sans-serif;
  font-weight: 700;
  letter-spacing: -.04em;
  max-width: 16ch;
  margin-left: auto;
  margin-right: auto;
}
.theme-digital .hero-art img {
  border-radius: 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,.18);
  transform: rotate(-6deg);
}
.theme-digital .book-card { border-radius: 24px; }
.theme-digital .book-cover { border-radius: 24px 24px 0 0; overflow: hidden; }
.theme-digital .nb-btn { border-radius: 999px; }
.theme-digital .cat-grid { grid-template-columns: repeat(6, 1fr); }
.theme-digital .cat-card { border-radius: 22px; background: var(--card); min-height: 7rem; }
.theme-digital .section-title { font-family: "Instrument Sans", sans-serif; letter-spacing: -.03em; }
@media (max-width: 980px) { .theme-digital .cat-grid { grid-template-columns: 1fr 1fr; } }