body {
  font-family: 'Inter', sans-serif;
  background: #f8fafc;
  color: #0f172a;
  scroll-behavior: smooth;
}

section {
  scroll-margin-top: 5rem;
}

.hero-gradient {
  background: radial-gradient(circle at top, rgba(59, 130, 246, 0.16), transparent 40%),
              radial-gradient(circle at top right, rgba(16, 185, 129, 0.14), transparent 35%);
}

.card-shadow {
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
}

.course-card {
  min-height: 260px;
}

.accordion-button {
  transition: color .2s ease;
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height .28s ease, padding .28s ease;
}

.accordion-panel.open {
  max-height: 400px;
  padding-top: 1rem;
}

.testimonial-dot {
  width: 10px;
  height: 10px;
  border-radius: 9999px;
  background: rgba(148, 163, 184, 0.6);
}

.testimonial-dot.active {
  background: #2563eb;
}

button.primary:hover {
  transform: translateY(-1px);
}

button.secondary:hover {
  transform: translateY(-1px);
}

model-viewer {
  width: 100%;
  min-height: 320px;
  border-radius: 1.5rem;
  background: rgba(15, 23, 42, 0.92);
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}