#walkthrough{--walk-b0:#3fb38e;--walk-b1:#8fd9bf;--walk-b2:#d6f0e6;--walk-b3:#ecede8;--walk-b4:#f4ded3;z-index:20;overscroll-behavior:contain;background:var(--plane);color:var(--ink);font:15px/1.6 system-ui,-apple-system,Segoe UI,sans-serif;position:fixed;inset:0;overflow-y:auto}#walkthrough:focus{outline:none}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) #walkthrough{--walk-b0:#1e7a60;--walk-b1:#145443;--walk-b2:#0e3a2f;--walk-b3:#23282a;--walk-b4:#472a20}}:root[data-theme=dark] #walkthrough{--walk-b0:#1e7a60;--walk-b1:#145443;--walk-b2:#0e3a2f;--walk-b3:#23282a;--walk-b4:#472a20}html.walk-open,html.walk-open body{overflow:hidden}.walk-bar{z-index:1;background:var(--surface);border-bottom:1px solid var(--rule);align-items:center;gap:8px;padding:8px 16px;font-size:13px;display:flex;position:sticky;top:0}.walk-bar .spacer{flex:1}.walk-shell{max-width:1080px;margin:0 auto;padding:0 16px 64px}.walk-eyebrow,.walk-step-no{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;font-size:11px;font-weight:600}.walk-hero{border-bottom:1px solid var(--rule);padding:56px 0 40px}.walk-hero h1{letter-spacing:-.02em;margin:0 0 14px;font-size:clamp(30px,5vw,46px);line-height:1.1}.walk-lede{max-width:60ch;color:var(--ink-2);margin:0 0 22px;font-size:17px}.walk-invariant{color:var(--ink-2);flex-wrap:wrap;align-items:center;gap:8px 14px;font-size:13px;display:flex}.walk-invariant span{border:1px solid var(--rule);background:var(--surface);border-radius:6px;padding:5px 10px}.walk-invariant b{color:var(--muted);font-variant-numeric:tabular-nums;margin-right:6px}.walk-invariant i{color:var(--muted);font-style:normal}.walk-step{border-bottom:1px solid var(--rule);grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:20px 40px;padding:40px 0;display:grid}.walk-step.walk-wide{grid-template-columns:minmax(0,1fr)}.walk-step.walk-wide .walk-copy{max-width:70ch}@media (max-width:860px){.walk-step{grid-template-columns:minmax(0,1fr)}.walk-step .walk-copy{order:-1}}.walk-copy h2{letter-spacing:-.01em;margin:0 0 12px;font-size:22px;line-height:1.25}.walk-copy p,.walk-copy ul{color:var(--ink-2);max-width:62ch;margin:0 0 12px}.walk-copy ul{padding-left:20px}.walk-copy li{margin-bottom:4px}.walk-copy b{color:var(--ink);font-weight:600}#walkthrough code,.walk-code pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}#walkthrough code{font-size:.9em}.walk-code{border:1px solid var(--rule);background:var(--surface);border-radius:8px;overflow:hidden}.walk-code-head{letter-spacing:.04em;text-transform:uppercase;color:var(--muted);background:var(--sunken);border-bottom:1px solid var(--grid);justify-content:space-between;gap:12px;padding:7px 12px;font-size:11px;display:flex}.walk-code pre{color:var(--ink);margin:0;padding:14px 16px;font-size:12.5px;line-height:1.55;overflow-x:auto}.walk-comment{color:var(--muted)}.walk-stats{flex-wrap:wrap;gap:22px;padding:18px 16px;display:flex}.walk-stats .stat .v{font-size:22px}.walk-facts{grid-template-columns:auto 1fr;gap:8px 14px;margin:0;padding:14px 16px;font-size:13.5px;display:grid}.walk-facts dt{font-weight:600}.walk-facts dd{color:var(--ink-2);margin:0}.walk-map{margin:0}.walk-map-controls{align-items:center;gap:10px;margin-bottom:10px;font-size:13px;display:flex}.walk-seg{border:1px solid var(--rule);border-radius:7px;display:inline-flex;overflow:hidden}.walk-seg button{color:var(--ink);background:0 0;border:0;border-radius:0;padding:5px 12px;font-size:13px}.walk-seg button+button{border-left:1px solid var(--rule)}.walk-seg button[aria-pressed=true]{background:var(--ink);color:var(--plane)}.walk-plot{width:100%;height:min(440px,72vw);min-height:280px;position:relative}.walk-plot canvas{touch-action:pan-y;width:100%;height:100%;display:block}.walk-readout{min-height:1.6em;color:var(--ink-2);margin:8px 0 14px;font-size:13.5px}.walk-legend{color:var(--ink-2);flex-wrap:wrap;gap:6px 16px;font-size:13px;display:flex}.walk-legend span{align-items:center;gap:6px;display:inline-flex}.walk-legend i{border:1px solid var(--rule);border-radius:3px;width:13px;height:13px}.walk-key{border-top:1px solid var(--rule);grid-template-columns:auto 1fr;align-items:baseline;gap:6px 14px;margin-top:14px;padding-top:14px;font-size:13.5px;display:grid}.walk-key b{white-space:nowrap}.walk-key p{color:var(--ink-2);max-width:72ch;margin:0}@media (max-width:520px){.walk-key{grid-template-columns:1fr}.walk-key p{margin-bottom:6px}}.walk-end{max-width:64ch;padding:56px 0 8px}.walk-end h2{letter-spacing:-.01em;margin:0 0 12px;font-size:26px;line-height:1.2}.walk-end p{color:var(--ink-2);margin:0 0 20px}.walk-cta{padding:8px 16px;font-size:14px}