.chapter{min-height:100vh;padding-bottom:60px}.chapter-back{margin:22px 0 0 24px;display:inline-flex}.chapter-hero{text-align:center;max-width:980px;margin:0 auto;padding:34px 24px 8px}.chapter-title{margin-top:10px}.chapter-lede{margin-left:auto;margin-right:auto}.chapter-chips{flex-wrap:wrap;justify-content:center;gap:8px;margin:18px 0 4px;display:flex}.chapter-chip{border:1px solid var(--line);color:var(--text-dim);border-radius:999px;padding:5px 12px;font-size:12.5px;text-decoration:none}a.chapter-chip:hover{border-color:var(--line-strong);color:var(--text)}.chapter-chip--soon{color:var(--text-faint);cursor:default;border-style:dashed}.chapter-chip--soon .chapter-chip-soon{font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;margin-left:6px;font-size:9px}.chapter-next{max-width:880px;margin:40px auto 0}.chapter-next--soon{opacity:.65;cursor:default}.track-hub{max-width:1080px;margin:0 auto;padding:5vh 24px 64px}.track-back{font-family:var(--mono);color:var(--altitude);border:1px solid var(--line-strong);border-radius:var(--radius-sm);margin-bottom:28px;padding:6px 12px;font-size:13px;text-decoration:none;display:inline-block}.track-hero{margin-bottom:10px}.track-eyebrow{font-family:var(--mono);letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin:0;font-size:12px}.track-hero-title{letter-spacing:-.02em;margin:14px 0;font-size:clamp(32px,4.6vw,48px);font-weight:800;line-height:1.05}.track-accent{color:var(--altitude)}.track-hero-lede{color:var(--text-dim);max-width:52ch;margin:0;font-size:16px;line-height:1.6}.track-cutaway-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);max-width:860px;margin:24px auto 0;padding:14px 16px 6px;position:relative}.cutaway-svg{width:100%;height:auto;display:block}.track-cutaway-hint{font-family:var(--mono);color:var(--text-faint);text-align:center;margin:2px 4px 8px;font-size:10.5px}.cut-marker:focus{outline:none}@media (max-width:640px){.cut-marker-hit{r:54px}}.cut-marker:focus-visible circle:nth-of-type(2){stroke:var(--accent);stroke-width:2.4px}.track-stages{grid-template-columns:1fr 1fr;gap:4px 28px;max-width:860px;margin:22px auto 0;display:grid}.track-stage-header{align-items:center;gap:12px;margin:30px 0 16px;display:flex}.track-stage-label{font-family:var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--accent);white-space:nowrap;font-size:11px}.track-stage-rule{background:var(--line);flex:1;height:1px}.track-stage-list{flex-direction:column;gap:4px;display:flex}.track-station{border-radius:var(--radius-sm);background:0 0;border:1px solid #0000;align-items:center;gap:14px;padding:10px 12px;text-decoration:none;transition:background .15s,border-color .15s;display:flex}.track-station--hot{border-color:var(--line-strong);background:#7ecbff0f}.track-station-glyph{flex:none;display:flex}.track-station-body{min-width:0}.track-station-head{align-items:baseline;gap:8px;display:flex}.track-station-n{font-family:var(--mono);color:var(--text-faint);letter-spacing:.12em;font-size:10px}.track-station-title{color:var(--text);font-size:15.5px;font-weight:650}.track-station--hot .track-station-title{color:#7ecbff}.track-station-line{color:var(--text-dim);margin-top:2px;font-size:12.5px;line-height:1.45;display:block}@media (max-width:760px){.track-stages{grid-template-columns:1fr}}