/* ============================================================
   part4.css - Page-specific styles for Part 4: Skills Architecture.
   Shared layout/content styles live in module.css.
   ============================================================ */

/* ----------------------------------------
   Loading levels timeline (3-level progressive disclosure)
   ---------------------------------------- */
.loading-levels {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 24px 0;
}

.loading-level {
  display: flex;
  gap: 20px;
}

.level-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.level-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue-accent);
  background: rgba(79, 195, 247, 0.1);
  border: 1px solid rgba(79, 195, 247, 0.3);
  border-radius: 50%;
  flex-shrink: 0;
}

.level-line {
  flex: 1;
  width: 1px;
  background: linear-gradient(to bottom, rgba(79, 195, 247, 0.3), rgba(79, 195, 247, 0.05));
  margin: 4px 0;
  min-height: 24px;
}

.loading-level:last-child .level-line {
  display: none;
}

.level-content {
  padding: 4px 0 28px;
  flex: 1;
}

.level-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.level-content p {
  font-size: 0.88rem !important;
  color: var(--text-secondary) !important;
  line-height: 1.7;
  margin: 0 !important;
}

.level-content code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--blue-accent);
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.15);
  border-radius: 4px;
  padding: 1px 6px;
}

/* ----------------------------------------
   Tradeoff grid (downside vs upside panels)
   ---------------------------------------- */
.tradeoff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
}

.tradeoff-panel {
  padding: 22px 24px;
  border-radius: var(--radius-lg);
}

.tradeoff-downside {
  background: rgba(248, 113, 113, 0.05);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

.tradeoff-upside {
  background: rgba(52, 211, 153, 0.05);
  border: 1px solid rgba(52, 211, 153, 0.18);
}

.tradeoff-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.tradeoff-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.tradeoff-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tradeoff-downside .tradeoff-title {
  color: #f87171;
}

.tradeoff-upside .tradeoff-title {
  color: #34d399;
}

.tradeoff-panel p {
  font-size: 0.875rem !important;
  color: var(--text-secondary) !important;
  line-height: 1.7;
  margin: 0 !important;
}

/* ----------------------------------------
   Responsive
   ---------------------------------------- */
@media (max-width: 600px) {
  .tradeoff-grid {
    grid-template-columns: 1fr;
  }

  .level-content {
    padding-bottom: 20px;
  }
}