.film-chapters{display:flex;gap:6px;flex-wrap:wrap;padding:14px 20px;border-top:1px solid var(--line)}.film-chapters button{border:1px solid var(--line);background:var(--surface);font:10px var(--sans);padding:7px 11px;color:var(--muted)}.film-chapters button:hover{color:var(--ink);background:var(--tint)}.film-chapters button span{font:9px var(--mono);margin-right:5px;opacity:.7}.loss-explainer{margin-top:45px;border-top:1px solid var(--line);padding-top:35px}.loss-heading{display:flex;align-items:baseline;justify-content:space-between;gap:25px}.loss-heading h3{font-size:27px;letter-spacing:-.6px}.loss-heading .mono{font-size:9px;color:var(--muted)}.loss-equation{background:#fffef8;border:1px solid var(--line);padding:30px;margin-top:24px;overflow:hidden}.loss-equation img{display:block;width:min(840px,100%);height:auto;margin:auto}.loss-explainer .loss-terms{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:25px}.loss-terms h4{font-size:14px;font-weight:550;line-height:1.5;margin:0}.loss-terms p{font-size:12px;line-height:1.85;color:var(--muted);margin-top:8px}.loss-details{margin-top:25px;border-top:1px solid var(--line);padding-top:16px}.loss-details summary{font-size:12px;cursor:pointer}.loss-details-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.loss-detail{padding:22px;border:1px solid var(--line);background:var(--surface);min-width:0}.loss-detail .mono{font-size:9px;color:var(--accent-dark)}.loss-detail h4{margin:10px 0 0;font-size:16px;line-height:1.4;font-weight:500}.loss-detail .equation-canvas{padding:14px;background:#fffef8;border:1px solid var(--line);margin:17px 0}.loss-detail img{width:100%;height:100px;object-fit:contain;display:block}.loss-detail p{font-size:11px;line-height:1.85;color:var(--muted)}.loss-note{font-size:10px;color:var(--muted);margin-top:20px}.loss-note a{font-weight:500}.loss-explainer code{font-size:11px}.loss-details-grid li{font-size:11px;line-height:1.8;color:var(--muted)}@media(max-width:760px){.film-chapters{padding:12px 14px;gap:5px}.film-chapters button{font-size:9px;padding:7px 8px}.loss-explainer{margin-top:30px;padding-top:26px}.loss-heading{display:block}.loss-heading .mono{margin-top:12px;display:block}.loss-heading h3{font-size:25px}.loss-equation{padding:18px 12px}.loss-explainer .loss-terms{grid-template-columns:1fr;gap:20px}.loss-details-grid{grid-template-columns:1fr}.loss-detail img{height:90px}}