/* =========================================================
   LAYOUT D — Vertical Timeline
   Used for: MVP Development
   ========================================================= */

/* Minimalist Typography Hero */
.layout-d-hero {
  padding: 8rem 0 5rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.layout-d-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-purple), transparent);
}

.layout-d-hero h1 {
  font-size: clamp(3.5rem, 6vw, 5rem);
  font-weight: 800;
  color: var(--color-gray-900);
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.layout-d-hero p {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

/* Vertical Timeline */
.timeline-section {
  padding: 6rem 0;
  background: var(--surface-soft);
}

.timeline-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

/* The vertical line */
.timeline-container::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 40px;
  width: 2px;
  background: var(--color-gray-200);
}

.timeline-item {
  position: relative;
  padding-left: 100px;
  margin-bottom: 4rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: 20px;
  top: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-white);
  border: 4px solid var(--color-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-purple);
  box-shadow: 0 0 0 4px var(--surface-soft);
  z-index: 2;
}

.timeline-item:nth-child(even) .timeline-marker {
  border-color: var(--color-mint);
  color: var(--color-mint);
}

.timeline-content {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.timeline-meta {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin-bottom: 0.5rem;
  display: block;
}

.timeline-content h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--color-gray-900);
}

.timeline-content p {
  color: var(--color-gray-600);
  font-size: 1.1rem;
  line-height: 1.6;
  margin: 0;
}

/* Benefits Grid */
.benefits-section {
  padding: 6rem 0;
  background: var(--surface);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  margin-top: 3rem;
}

.benefit-item {
  display: flex;
  gap: 1.5rem;
}

.benefit-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  background: var(--surface-soft);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.benefit-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-purple);
}

.benefit-text h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.benefit-text p {
  color: var(--color-gray-600);
  font-size: 0.95rem;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .timeline-container::before {
    left: 20px;
  }
  .timeline-marker {
    left: 0;
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }
  .timeline-item {
    padding-left: 60px;
  }
  .timeline-content {
    padding: 1.5rem;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}