:root{--ground:#f2f2f2;--ink:#000114;--accent:#2f0ac2;--line:#d4d4da;color-scheme:light;font-family:Inter,Arial,sans-serif;color:var(--ink);background:var(--ground)}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit;text-underline-offset:4px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.wrap{max-width:1400px;margin:auto;padding:0 5vw}.top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:25px 0;gap:20px}.wordmark{font-size:24px;letter-spacing:-1.4px}.meta,.eyebrow,.number{font:11px/1.5 ui-monospace,monospace;letter-spacing:.06em}.intro{padding:72px 0 48px;display:grid;grid-template-columns:1.5fr 1fr;align-items:end;gap:45px}h1{font-size:clamp(38px,5.5vw,76px);font-weight:400;line-height:1.02;letter-spacing:-.055em;margin:15px 0 0;max-width:12ch}p{line-height:1.6}h2{font-size:27px;letter-spacing:-.035em;font-weight:400;margin:0}.intro p{max-width:40ch;color:#555}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 30px}.filters button,.play{border:1px solid var(--line);background:transparent;padding:11px 17px;font-size:13px}.filters [aria-pressed=true]{background:var(--ink);color:var(--ground);border-color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:44px 24px}.card{min-width:0;border-top:1px solid var(--ink);padding-top:18px;scroll-margin-top:24px}.card[hidden]{display:none}.card-head{display:flex;justify-content:space-between;gap:16px;align-items:center}.card-head .number{color:#555}.art{position:relative;width:100%;aspect-ratio:1.6;margin:20px 0 0;contain:layout paint;isolation:isolate;background:#e9e9ed;overflow:hidden}.art img,.art .vector{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.art .vector:empty{display:none}.vector svg{width:100%;height:100%;display:block;pointer-events:none;color:var(--ink)}.vector .occ{fill:var(--ground)}.vector .act{fill:var(--accent);opacity:0}.vector .ln-layer{transition:transform 700ms cubic-bezier(.2,.7,.15,1)}.vector .activated .act{opacity:.13}.vector .activated{color:var(--accent)}.vector .lane{fill:none;stroke:currentColor;stroke-width:1.6;opacity:.3}.vector .traveller{fill:var(--accent);opacity:0}.vector .moving-layer{transform:translate(var(--dx,0px),var(--dy,0px))}.art{--ground:#e9e9ed}.card.blue .art{--ground:#000114;background:var(--ground)}.card.blue .vector svg{color:#c0baff;--accent:#c0baff}.card.lilac .art{--ground:#c0baff;background:var(--ground)}
.steps{display:flex;align-items:center;gap:8px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:15px 0;font-size:12px;min-height:49px}.steps span+span:before{content:'→';color:#8a8a95;margin-right:8px}.steps span[data-current=true]{color:var(--accent)}.card-copy{color:#555;font-size:14px;max-width:55ch;min-height:45px;margin:14px 0}.control{display:flex;align-items:center;gap:15px;justify-content:space-between;min-height:48px}.status{font:11px/1.4 ui-monospace,monospace;color:#666;text-align:right}.play{min-width:105px;border-color:var(--ink)}.play:disabled{cursor:default;opacity:.55}.reference{font-size:11px;color:#666;margin:14px 0 0}.earlier{margin:65px 0 0;border-top:1px solid var(--line);padding-top:25px}.earlier summary{cursor:pointer;font-size:20px;margin-bottom:30px}.sources{padding:55px 0;border-top:1px solid var(--line);margin-top:60px}.sources p{color:#555;font-size:14px;max-width:75ch}.source-links{display:flex;gap:20px;flex-wrap:wrap;font-size:13px}.foot{padding:20px 0 35px;border-top:1px solid var(--line);font-size:11px;color:#555}.noscript{padding:15px;background:#e7e7e7}.filters{display:none}.js .filters{display:flex}.play{display:none}.js .play{display:block}
@media(max-width:700px){.wrap{padding:0 20px}.intro{grid-template-columns:1fr;gap:20px;padding:42px 0 28px}.intro p{margin:0}.grid{grid-template-columns:1fr;gap:35px}.meta{font-size:9px;max-width:13ch;text-align:right}.art{aspect-ratio:1.35}h2{font-size:24px}.steps{font-size:11px;gap:5px}.status{max-width:18ch}.card-copy{min-height:0}.source-links{gap:14px}.top{padding:20px 0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}