/* Project articles extend the existing STEM Guides shell and article styles. */
.project-guide .site-nav { margin-bottom: 28px; }
.project-guide .page-header { padding-bottom: 20px; }
.project-guide h1 { font-size: clamp(2rem, 5vw, 3.6rem); margin: 8px 0 16px; }
.project-guide .lead { max-width: 72ch; }
.project-guide .project-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.project-guide .guide-content { min-width: 0; }
.project-guide .guide-section { padding: 0 0 32px; margin: 0 0 24px; border-bottom: 1px solid var(--border); }
.project-guide .guide-section > h2 { display: block; margin: 0 0 14px; font-size: 1.65rem; }
.project-guide h3 { margin: 0 0 8px; font-size: 1.1rem; }
.project-guide p { margin: 0 0 14px; }
.project-guide ul, .project-guide ol { padding-left: 24px; }
.project-guide li { margin-bottom: 10px; }
.project-guide .steps { padding-left: 28px; }
.project-guide .steps > li { padding-left: 8px; margin-bottom: 26px; }
.project-guide .steps > li::marker { color: var(--cyan); font-weight: 800; font-size: 1.2rem; }
.project-guide figure { margin: 18px 0 24px; }
.project-guide img { display: block; max-width: 100%; height: auto; border-radius: 10px; }
.project-guide .hero-photo img { width: 100%; max-height: 370px; object-fit: contain; background: #f5f3ee; }
.project-guide .detail-photo img { width: min(100%, 560px); }
.project-guide figcaption { color: var(--muted); font-size: .84rem; margin-top: 8px; }
.project-guide .diagram { padding: 12px; border-radius: 10px; background: white; }
.project-guide .diagram img { width: 100%; border-radius: 0; }
.project-guide .diagram-scroll { overflow-x: auto; }
.project-guide .diagram-scroll img { min-width: 620px; }
.project-guide .diagram figcaption { color: #333; }
.project-guide .checkpoint { margin: 18px 0; padding: 16px 18px; border-left: 4px solid var(--focus); border-radius: 0 10px 10px 0; background: #28263a; }
.project-guide .checkpoint strong { display: block; margin-bottom: 5px; color: #ffe18a; }
.project-guide .checkpoint p:last-child { margin: 0; }
.project-guide .project-table { overflow-x: auto; margin: 18px 0; }
.project-guide table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.project-guide caption { text-align: left; font-weight: 700; padding-bottom: 8px; }
.project-guide th, .project-guide td { text-align: left; vertical-align: top; padding: 10px; border: 1px solid var(--border); }
.project-guide th { background: var(--panel-soft); }
.project-guide .formula { padding: 12px 16px; background: var(--panel-soft); border: 1px solid var(--border); border-radius: 8px; overflow-wrap: anywhere; }
.project-guide .project-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 18px 0 24px; }
.project-guide .print-button { font: inherit; padding: 9px 16px; color: var(--text); background: var(--panel-strong); border: 1px solid var(--border-strong); border-radius: 8px; cursor: pointer; }
.project-guide .print-button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.project-guide .guide-toc-mobile summary::before { content: '+'; font-family: inherit; }
.project-guide .guide-toc-mobile[open] summary::before { content: '-'; transform: none; }
.project-guide .source-credit { font-size: .9rem; color: var(--muted); }
@media (max-width: 600px) {
  .project-guide .shell { padding: 18px; }
  .project-guide th, .project-guide td { font-size: .85rem; padding: 8px; }
  .project-guide .diagram { padding: 3px; }
}
@media print {
  @page { size: letter; margin: 15mm; }
  body.project-guide { padding: 0; color: #111; background: white; font: 10.5pt/1.35 system-ui, sans-serif; }
  .project-guide .wrap { width: 100%; }
  .project-guide .shell { padding: 0; border: 0; border-radius: 0; background: white; box-shadow: none; overflow: visible; }
  .project-guide .site-nav, .project-guide .skip-link, .project-guide .guide-toc, .project-guide .guide-toc-mobile, .project-guide .project-actions, .project-guide .breadcrumb, .project-guide .site-footer { display: none !important; }
  .project-guide .guide-layout { display: block; }
  .project-guide .page-header { padding: 0 0 10px; }
  .project-guide h1 { font-size: 25pt; color: black; }
  .project-guide .lead { color: #111; font-size: 11pt; }
  .project-guide .eyebrow, .project-guide figcaption, .project-guide .source-credit { color: #333; }
  .project-guide h2, .project-guide h3 { break-after: avoid; color: black; }
  .project-guide figure, .project-guide .checkpoint, .project-guide tr { break-inside: avoid; }
  .project-guide .guide-section { border-color: #aaa; padding-bottom: 10px; margin-bottom: 12px; }
  .project-guide .guide-section > h2 { font-size: 15pt; }
  .project-guide h3 { font-size: 11pt; }
  .project-guide p { margin-bottom: 8px; }
  .project-guide .steps > li { margin-bottom: 12px; }
  .project-guide .source-credit { font-size: 9pt; }
  .project-guide figure img { max-height: 150mm; object-fit: contain; }
  .project-guide .hero-photo img { max-height: 65mm; width: auto; }
  .project-guide .detail-photo img { max-height: 60mm; width: auto; }
  .project-guide .checkpoint, .project-guide .formula { background: white; color: black; border: 1px solid #666; }
  .project-guide .checkpoint strong, .project-guide .steps > li::marker { color: black; }
  .project-guide th, .project-guide td { border-color: #777; background: white; }
  .project-guide .project-table { overflow: visible; }
  .project-guide .diagram-scroll { overflow: visible; }
  .project-guide .diagram-scroll img { min-width: 0; }
  .project-guide .tag { color: black; border-color: #888; background: white; }
  .project-guide a { color: #111; text-decoration: underline; }
}