/* ==============================================================================
   Nuclear Valley 3D - Custom MkDocs Documentation Stylesheet
   ============================================================================== */

:root {
  --nv-cyan: #06b6d4;
  --nv-cyan-glow: rgba(6, 182, 212, 0.4);
  --nv-amber: #f59e0b;
  --nv-bg-card: rgba(15, 23, 42, 0.6);
  --nv-border: rgba(56, 189, 248, 0.2);
}

/* Call to Action Hero Button */
.cta-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 1.5rem 0 2rem 0;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #0d9488 100%);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none !important;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
  transition: all 0.25s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.55);
  background: linear-gradient(135deg, #0369a1 0%, #0891b2 50%, #0f766e 100%);
}

.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(148, 163, 184, 0.12);
  color: inherit !important;
  font-weight: 600;
  font-size: 1rem;
  padding: 12px 20px;
  border-radius: 8px;
  text-decoration: none !important;
  border: 1px solid rgba(148, 163, 184, 0.25);
  transition: all 0.2s ease;
}

.btn-cta-secondary:hover {
  background: rgba(148, 163, 184, 0.25);
  transform: translateY(-2px);
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 1.5rem 0;
}

.feature-card {
  background: var(--md-card-bg-color, rgba(148, 163, 184, 0.05));
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 8px;
  padding: 16px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  border-color: var(--nv-cyan);
  box-shadow: 0 4px 12px var(--nv-cyan-glow);
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.1rem;
  color: var(--md-primary-fg-color);
}

/* Isotope Chip */
.isotope-chip {
  display: inline-block;
  font-family: var(--md-code-font-family, monospace);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--nv-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* Math typesetting refinements */
.arithmatex {
  font-size: 1.05em;
}