.pc-art { margin: 1.5rem 0 2rem; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bg-secondary); }
html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }
.pc-skip { position: absolute; left: 1rem; top: -6rem; padding: .75rem; background: var(--bg); color: var(--text); z-index: 1000; }
.pc-skip:focus { top: 1rem; }
main h1, main h2 { text-wrap: balance; scroll-margin-top: 6rem; }
button, a { touch-action: manipulation; }
.series-status.is-complete { color: #166534; background: #f0fdf4; }
[data-theme="dark"] .series-status.is-complete { color: #bbf7d0; background: #163b27; }
.pc-art svg { display: block; width: 100%; height: auto; aspect-ratio: 1200 / 380; }
.pc-art .ground { fill: var(--bg-secondary, #f6f8fa); }
.pc-art .thread { stroke: #416775; }
.pc-art .ink { fill: #416775; }
.pc-art .sage { fill: #65816a; }
.pc-art .clay { fill: #ad684d; }
.pc-art .gold { fill: #a08848; }
[data-theme="dark"] .pc-art .thread { stroke: #a7ced9; }
[data-theme="dark"] .pc-art .ink { fill: #a7ced9; }
[data-theme="dark"] .pc-art .sage { fill: #b2cc9e; }
[data-theme="dark"] .pc-art .clay { fill: #edac88; }
[data-theme="dark"] .pc-art .gold { fill: #ddcb89; }
.pc-art.pc-motion .facet { animation: pc-settle 1.3s ease-out both; transform-box: fill-box; transform-origin: center; }
.pc-art.pc-motion .thread { stroke-dasharray: 1800; animation: pc-trace 2.2s ease-out both; }
@keyframes pc-settle { from { opacity: .2; } to { opacity: 1; } }
@keyframes pc-trace { from { stroke-dashoffset: 1800; } to { stroke-dashoffset: 0; } }
.pc-diagram { margin: 2rem 0; padding: 1.25rem; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-secondary); }
.pc-diagram figcaption { margin-top: 1rem; font-size: .875rem; color: var(--text-secondary); }
.pc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 175px), 1fr)); gap: .85rem; }
.pc-box { min-width: 0; padding: 1rem; border: 1px solid var(--border); border-radius: 4px; background: var(--bg); }
.pc-box strong { display: block; margin-bottom: .4rem; }
.pc-box p { font-size: .9rem; line-height: 1.6; margin: 0; }
.pc-edge { margin: .8rem 0 !important; font-size: .85rem; text-align: center; color: var(--text-secondary); }
.pc-stop { border-style: dashed; }
.pc-contract { margin: 1.5rem 0; }
.pc-contract dt { margin-top: 1rem; font-weight: 650; }
.pc-contract dd { margin: .25rem 0 .75rem; }
.content pre { white-space: pre-wrap; overflow-wrap: anywhere; padding: 1rem; border: 1px solid var(--border); background: var(--bg-secondary); border-radius: 6px; font-size: .85rem; line-height: 1.6; margin-bottom: 1rem; }
.content code { font-family: var(--font-mono); }
.content ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.pc-note { padding: .75rem 1rem; background: var(--bg-secondary); margin: 1.5rem 0; }
.pc-diagram h3 { font-size: 1rem; margin-bottom: .75rem; }
.pc-guide { margin: 1rem 0; padding-left: 1.5rem; }
.pc-guide li { margin-bottom: .75rem; }
.theme-toggle, .theme-btn { min-width: 44px; min-height: 44px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
@media (max-width: 600px) {
  .pc-art svg { aspect-ratio: 1200 / 520; }
  .pc-diagram { padding: .85rem; }
  .pc-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .pc-art *, .pc-art.pc-motion * { animation: none !important; }
}
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) { color-scheme: dark; --bg: #0d1117; --bg-secondary: #161b22; --text: #e6edf3; --text-muted: #8b949e; --text-secondary: #8b949e; --border: #30363d; --accent: #58a6ff; --accent-subtle: #1f2a38; }
  html:not([data-theme]) .pc-art .thread { stroke: #a7ced9; }
  html:not([data-theme]) .pc-art .ink { fill: #a7ced9; }
  html:not([data-theme]) .pc-art .sage { fill: #b2cc9e; }
  html:not([data-theme]) .pc-art .clay { fill: #edac88; }
  html:not([data-theme]) .pc-art .gold { fill: #ddcb89; }
  html:not([data-theme]) .series-status.is-complete { color: #bbf7d0; background: #163b27; }
}