/* Mobicolon — How We Build timeline (extends main design system) */

.build-timeline {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  min-height: 700px;
}

.build-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.build-timeline-item {
  display: grid;
  grid-template-columns: 1fr 3rem 1fr;
  align-items: center;
  gap: 1.25rem 1.5rem;
  min-height: 128px;
  position: relative;
}

.build-timeline-track {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  align-self: stretch;
  z-index: 2;
}

.build-timeline-track::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #dbeafe 0%, #2563eb 50%, #dbeafe 100%);
  opacity: 0.55;
}

.dark .build-timeline-track::before {
  background: linear-gradient(180deg, #334155 0%, #3b82f6 50%, #334155 100%);
  opacity: 0.7;
}

.build-timeline-item:first-child .build-timeline-track::before {
  top: 50%;
}

.build-timeline-item:last-child .build-timeline-track::before {
  bottom: 50%;
}

.build-timeline-node {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 2px solid #2563eb;
  background: #fff;
  font-size: 11px;
  font-weight: 700;
  color: #2563eb;
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.08);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s ease;
}

.dark .build-timeline-node {
  background: #1e293b;
  border-color: #3b82f6;
  color: #60a5fa;
  box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.12);
}

.build-timeline-item:hover .build-timeline-node {
  transform: scale(1.08);
  box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.12);
}

.build-timeline-card-wrap {
  grid-row: 1;
  width: 100%;
  max-width: 400px;
}

.build-timeline-item--left .build-timeline-card-wrap {
  grid-column: 1;
  justify-self: end;
}

.build-timeline-item--right .build-timeline-card-wrap {
  grid-column: 3;
  justify-self: start;
}

.build-timeline-spacer {
  grid-row: 1;
}

.build-timeline-item--left .build-timeline-spacer {
  grid-column: 3;
}

.build-timeline-item--right .build-timeline-spacer {
  grid-column: 1;
}

.build-timeline-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.35rem 1.5rem;
  border-radius: 16px;
  border: 1px solid #e5e7eb;
  background: #fff;
  transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark .build-timeline-card {
  border-color: #334155;
  background: #1e293b;
}

.build-timeline-card:hover {
  border-color: #d1d5db;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

.dark .build-timeline-card:hover {
  border-color: #475569;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.build-timeline-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  background: #eff6ff;
  color: #2563eb;
  transition: background 0.3s ease, transform 0.35s ease;
}

.dark .build-timeline-icon {
  background: rgba(37, 99, 235, 0.15);
  color: #60a5fa;
}

.build-timeline-card:hover .build-timeline-icon {
  transform: scale(1.05);
}

.build-timeline-content {
  min-width: 0;
  flex: 1;
}

.build-timeline-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
  color: #111827;
}

.dark .build-timeline-title {
  color: #f1f5f9;
}

.build-timeline-desc {
  font-size: 14px;
  line-height: 1.65;
  color: #6b7280;
  margin: 0;
}

.dark .build-timeline-desc {
  color: #94a3b8;
}

/* Tablet: tighter alternating */
@media (max-width: 1023px) and (min-width: 768px) {
  .build-timeline {
    max-width: 720px;
  }

  .build-timeline-item {
    grid-template-columns: 1fr 2.5rem 1fr;
    gap: 1rem;
    min-height: 108px;
  }

  .build-timeline-card-wrap {
    max-width: 320px;
  }

  .build-timeline-card {
    padding: 1.15rem 1.25rem;
  }
}

/* Mobile: vertical timeline */
@media (max-width: 767px) {
  .build-timeline {
    min-height: auto;
    padding-left: 0.25rem;
  }

  .build-timeline-item {
    grid-template-columns: 2.75rem 1fr;
    grid-template-rows: auto;
    gap: 0 1.25rem;
    min-height: auto;
    padding: 0.75rem 0;
  }

  .build-timeline-track {
    grid-column: 1;
    grid-row: 1;
    align-self: stretch;
  }

  .build-timeline-track::before {
    left: 50%;
    top: 0;
    bottom: 0;
  }

  .build-timeline-item:first-child .build-timeline-track::before {
    top: 1.5rem;
  }

  .build-timeline-item:last-child .build-timeline-track::before {
    bottom: 1.5rem;
  }

  .build-timeline-card-wrap {
    grid-column: 2;
    grid-row: 1;
    justify-self: stretch !important;
    max-width: none;
  }

  .build-timeline-spacer {
    display: none;
  }

  .build-timeline-node {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .build-timeline-card,
  .build-timeline-node,
  .build-timeline-icon,
  .build-timeline-item:hover .build-timeline-node {
    transition: none;
    transform: none;
  }

  .build-timeline-card:hover {
    transform: none;
  }
}