/* Additional sections for the INHEIF single-product front page.
   Keeps `what_building.css` focused on hero / value / CTA, and puts the
   new workflow + featured-papers visuals here. */

/* ── Workflow (numbered steps) ── */
.lp-workflow {
  padding: 5rem 2rem;
  background: #ffffff;
  border-top: 1px solid #e2e8f0;
}

.lp-workflow-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.lp-step {
  position: relative;
  background: #f7fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 2rem 1.75rem 1.75rem;
}

.lp-step-num {
  position: absolute;
  top: -1rem;
  left: 1.5rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: #2d3748;
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(45, 55, 72, 0.25);
}

.lp-step h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #2d3748;
  margin: 0.25rem 0 0.75rem;
}

.lp-step p {
  color: #4a5568;
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0;
}

/* ── Featured White Papers ── */
.lp-papers {
  padding: 5rem 2rem;
  background: #f7fafc;
  border-top: 1px solid #e2e8f0;
}

.lp-papers-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.lp-paper-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s, transform 0.25s;
}

.lp-paper-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
  color: inherit;
}

.lp-paper-category {
  display: inline-block;
  background: #2d3748;
  color: #fff;
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  align-self: flex-start;
}

.lp-paper-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #2d3748;
  margin: 0 0 0.5rem;
  line-height: 1.4;
}

.lp-paper-summary {
  color: #4a5568;
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0 0 1rem;
}

.lp-paper-meta {
  font-size: 0.8rem;
  color: #718096;
  margin-top: auto;
}

.lp-papers-cta {
  text-align: center;
  margin-top: 2.5rem;
}

.lp-papers-empty {
  text-align: center;
  color: #718096;
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .lp-workflow { padding: 3rem 1.5rem; }
  .lp-workflow-grid { grid-template-columns: 1fr; gap: 2rem; }
  .lp-papers { padding: 3rem 1.5rem; }
}