.pd-step{border-top:1px solid var(--line);padding-block:2.5rem}.pd-step-body{position:relative}.pd-step-body :is(h3,h4){text-wrap:balance}.pd-step-inline{margin-top:2rem}.pd-chapter{margin-bottom:2rem}.pd-chapter-title{display:flex;align-items:center;gap:.65rem;font-family:var(--font-mono);font-size:.75rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-fg)}.pd-chapter-num{display:inline-flex;height:1.5rem;align-items:center;border-radius:9999px;border:1px solid color-mix(in srgb,var(--brand-fg) 40%,transparent);padding:0 .5rem;letter-spacing:.04em}.pd-step-num{display:inline-flex;height:1.75rem;align-items:center;border-radius:9999px;border:1px solid var(--line-strong);padding:0 .65rem;font-family:var(--font-mono);font-size:.75rem;font-variant-numeric:tabular-nums;color:var(--muted)}.pd-step-link{margin-top:.75rem;display:inline-flex;min-height:2.75rem;align-items:center;gap:.4rem;font-weight:500;color:var(--brand-fg);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}.pd-step-link:hover{color:var(--ink)}.pd-chip{display:inline-flex;height:2.75rem;align-items:center;gap:.55rem;border-radius:9999px;border:1px solid var(--line-strong);background:var(--surface);padding:0 1.1rem;font-size:14px;font-weight:500;color:var(--ink)}.pd-chip:hover{border-color:var(--ink)}.pd-stage{display:none}@media(min-width:1024px){html:not(.js-motion) .pd-step{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:center;column-gap:2.5rem;padding-block:3.5rem}html:not(.js-motion) .pd-chapter{grid-column:1 / -1}html:not(.js-motion) .pd-step-inline{margin-top:0}.js-motion .pd-chapnav,.js-motion .pd-step-inline{display:none}.js-motion .pd-stage-grid{display:grid;grid-template-columns:minmax(0,4.5fr) minmax(0,7.5fr);gap:2.5rem}.js-motion .pd-step{display:flex;min-height:54vh;flex-direction:column;justify-content:center}.js-motion .pd-step-body{padding-left:1.25rem}.js-motion .pd-step-body:before{content:"";position:absolute;inset:.2rem auto .2rem 0;width:2px;border-radius:2px;background:var(--line-strong)}.js-motion .pd-step.is-active .pd-step-body:before{background:var(--brand)}.js-motion .pd-step.is-active .pd-step-num{border-color:var(--brand);background:var(--brand);color:#fff}.js-motion .pd-stage{display:block}.pd-stage-sticky{position:sticky;top:7rem;display:grid;height:calc(100vh - 9rem);max-height:760px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:1.25rem}.pd-stage-frames{position:relative;height:100%}.pd-stage-frame{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(14px) scale(.985);pointer-events:none}.pd-stage-frame.is-active{opacity:1;visibility:visible;transform:none;pointer-events:auto}.pd-rail{display:flex;flex-direction:column;gap:.9rem}.pd-rail ol{position:relative;display:flex;flex-direction:column;gap:.15rem}.pd-rail ol:before{content:"";position:absolute;left:.95rem;top:.5rem;bottom:.5rem;width:1px;background:var(--line-strong)}.pd-rail-chapter{display:none}.pd-rail-link{display:flex;min-height:2rem;align-items:center;gap:.6rem;border-radius:9999px;font-size:13px;color:var(--muted)}.pd-rail-link:hover{color:var(--ink)}.pd-rail-num{position:relative;display:inline-flex;width:1.9rem;height:1.9rem;flex:none;align-items:center;justify-content:center;border-radius:9999px;border:1px solid var(--line-strong);background:color-mix(in srgb,var(--paper-2) 50%,var(--paper));font-family:var(--font-mono);font-size:11px;font-variant-numeric:tabular-nums}.pd-rail-link[aria-current]{color:var(--ink);font-weight:500}.pd-rail-link[aria-current] .pd-rail-num{border-color:var(--brand);background:var(--brand);color:#fff}.pd-rail-title{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.dark .pd-step.is-active .pd-step-num,.dark .pd-rail-link[aria-current] .pd-rail-num{border-color:var(--brand-fg);background:var(--brand-fg);color:#0e1311}.dark .pd-step.is-active .pd-step-body:before{background:var(--brand-fg)}}@media(min-width:1280px){.pd-rail{width:9.75rem}.pd-rail-chapter{display:block;margin:0 0 .35rem .15rem;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.pd-rail-title{position:static;width:auto;height:auto;overflow:visible;clip-path:none;white-space:normal;line-height:1.25}}@media(min-width:1024px)and (prefers-reduced-motion:no-preference){.pd-stage-frame{transition:opacity .45s ease,visibility .45s,transform .7s var(--ease-out-strong, cubic-bezier(.23, 1, .32, 1))}.pd-step-body:before,.pd-step-num,.pd-rail-num{transition:background-color .35s ease,border-color .35s ease,color .35s ease}}