:root {

  --color-flight-teal: #4A7A8A;
  --color-flight-teal-light: #EDF3F5;
  --color-flight-sky: #5A8AAA;
  --color-flight-sky-light: #EDF5FA;
  --color-flight-rust: #8A6A4A;
  --color-flight-rust-light: #F5F0EA;

}

.meta {
  font-size: 13px;
  line-height: 1.4;
  color: var(--color-meta);
}

.post-body {
  padding: var(--space-3xl) 0;
}

.post-body p {
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.post-body strong {
  font-weight: 600;
}

.section-break .section-desc {
  font-size: 15px;
  color: var(--color-meta);
  margin-bottom: var(--space-xl);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-lg);
}

.status-badge.early {
  background: var(--color-flight-teal-light);
  color: var(--color-flight-teal);
}

.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.phase-timeline {
  margin: var(--space-xl) 0 var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.phase-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.phase-item:hover {
  border-color: var(--color-flight-teal);
  box-shadow: 0 2px 12px rgba(74, 122, 138, 0.06);
}

.phase-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-flight-teal-light);
  color: var(--color-flight-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.phase-item.active .phase-number {
  background: var(--color-flight-teal);
  color: white;
}

.phase-content h4 {
  font-size: 15px;
  margin-bottom: 2px;
}

.phase-content p {
  font-size: 13px;
  color: var(--color-meta);
  line-height: 1.5;
}

.category-section {
  margin-bottom: var(--space-2xl);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.category-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  background: var(--color-surface);
  flex-shrink: 0;
}

.category-header h3 {
  font-size: 21px;
  flex: 1;
}

.category-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-meta);
  background: var(--color-surface);
  padding: 4px 10px;
  border-radius: 999px;
}

.item-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.item-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.item-card:hover {
  border-color: var(--color-flight-teal);
  box-shadow: 0 2px 12px rgba(74, 122, 138, 0.06);
}

.item-thumb {
  width: 120px;
  height: 120px;
  border-radius: 10px;
  object-fit: contain;
  background: white;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  padding: 6px;
}

@media (max-width: 640px) {
  .item-thumb {
    width: 96px;
    height: 96px;
  }
}

.item-details {
  flex: 1;
  min-width: 0;
}

.item-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 2px;
}

.item-name a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.item-name a:hover {
  color: var(--color-flight-teal);
}

.item-desc {
  font-size: 13px;
  color: var(--color-meta);
  line-height: 1.5;
}

.item-tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border-radius: 999px;
  display: inline-block;
  margin-top: 4px;
}

.item-tag.radio {
  background: var(--color-flight-sky-light);
  color: var(--color-flight-sky);
}

.item-tag.power {
  background: #FDF3E8;
  color: #B8763A;
}

.item-tag.airframe {
  background: var(--color-flight-teal-light);
  color: var(--color-flight-teal);
}

.item-tag.propulsion {
  background: #F0EDF5;
  color: #6B5A8A;
}

.item-tag.control {
  background: #EDF5EF;
  color: #5A8A6B;
}

.item-tag.charging {
  background: #F5F0EA;
  color: var(--color-flight-rust);
}

.item-tag.tool {
  background: var(--color-surface);
  color: var(--color-meta);
}

.stats-bar {
  display: flex;
  gap: var(--space-2xl);
  padding: var(--space-xl) 0;
  margin: var(--space-lg) 0 var(--space-xl);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-section);
  font-size: 32px;
  font-weight: 400;
  color: var(--color-flight-teal);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-meta);
}

.inline-figure {
  margin: var(--space-2xl) 0;
}

.inline-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(31, 31, 31, 0.08);
  display: block;
}

.inline-figure figcaption {
  font-size: 12px;
  color: var(--color-meta);
  margin-top: var(--space-xs);
  font-style: italic;
  text-align: center;
  line-height: 1.4;
}

#site-footer .footer {
  margin-top: var(--space-3xl);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-4 { animation-delay: 0.4s; opacity: 0; }

.zoomable {
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.zoomable:hover {
  box-shadow: 0 8px 32px rgba(31, 31, 31, 0.16);
}

@media print {
  .nav, .toc { display: none; }
  .item-card { break-inside: avoid; }
  body { background: white; }
}