.instrument{padding-bottom:4rem}.i-hero{padding:5rem 0 3rem;max-width:720px}.i-hero h1{font-family:var(--serif-display);font-size:2.2rem;font-weight:400;line-height:1.35;color:var(--text);margin-bottom:1.5rem}.i-lead{font-family:var(--serif-body);font-size:1.1rem;line-height:1.75;color:var(--text-muted)}.i-section{padding:3rem 0;border-top:var(--border-width) solid var(--border)}.i-section h2{font-family:var(--serif-display);font-size:1.5rem;font-weight:400;color:var(--text);margin-bottom:1.25rem}.i-section>p{font-family:var(--serif-body);font-size:1.05rem;line-height:1.75;color:var(--text);max-width:720px;margin-bottom:1.25rem}.i-channels{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:2rem 0}.i-channel{border:var(--border-width) solid var(--border);border-radius:6px;padding:1.5rem}.i-channel-label{display:block;font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:.25rem}.i-channel-sub{display:block;font-family:var(--serif-body);font-size:1rem;color:var(--text);margin-bottom:1rem;padding-bottom:.75rem;border-bottom:var(--border-width) solid var(--border)}.i-channel ul{list-style:none;padding:0}.i-channel li{font-family:var(--serif-body);font-size:.9rem;line-height:1.5;color:var(--text-muted);padding:.3rem 0 .3rem 1rem;position:relative}.i-channel li:before{content:"";position:absolute;left:0;top:.75rem;width:4px;height:4px;border-radius:50%;background:var(--border)}.i-families{display:flex;flex-direction:column;gap:1.5rem;margin:2rem 0}.i-family{border:var(--border-width) solid var(--border);border-radius:6px;padding:1.5rem}.i-family-label{display:inline-block;font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:.5rem}.i-family-engine{display:inline-block;font-family:var(--mono);font-size:.6rem;color:var(--text-faint);margin-left:.5rem;margin-bottom:.5rem}.i-family>p{font-family:var(--serif-body);font-size:.95rem;line-height:1.6;color:var(--text);margin-bottom:1rem}.i-signals{display:flex;flex-wrap:wrap;gap:.5rem}.i-signals span{font-family:var(--mono);font-size:.7rem;letter-spacing:.02em;color:var(--text-muted);background:var(--bg-dim);padding:.35rem .75rem;border-radius:3px;border:var(--border-width) solid var(--border)}.i-calibration-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.5rem;margin:2rem 0}.i-cal-item{border:var(--border-width) solid var(--border);border-radius:6px;padding:1.5rem}.i-cal-label{display:block;font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:.75rem}.i-cal-item p{font-family:var(--serif-body);font-size:.9rem;line-height:1.6;color:var(--text)}.i-constraint-list{margin:2rem 0;border:var(--border-width) solid var(--border);border-radius:6px;overflow:hidden}.i-constraint{display:grid;grid-template-columns:200px 1fr;gap:1.5rem;padding:1rem 1.5rem;border-bottom:var(--border-width) solid var(--border);align-items:baseline}.i-constraint:last-child{border-bottom:none}.i-constraint-name{font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text)}.i-constraint-how{font-family:var(--serif-body);font-size:.95rem;line-height:1.6;color:var(--text-muted)}.i-stack{margin:1.5rem 0;border:var(--border-width) solid var(--border);border-radius:6px;overflow:hidden}.i-stack-row{display:grid;grid-template-columns:140px 1fr;gap:1.5rem;padding:.75rem 1.5rem;border-bottom:var(--border-width) solid var(--border);align-items:baseline}.i-stack-row:last-child{border-bottom:none}.i-stack-label{font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint)}.i-stack-value{font-family:var(--serif-body);font-size:.95rem;color:var(--text)}.i-close>p{font-family:var(--serif-display);font-size:1.3rem;font-weight:400;line-height:1.5;color:var(--text);max-width:600px}.i-close-links{display:flex;gap:2rem;margin-top:2rem}.i-close-links a{font-family:var(--serif-body);font-size:1rem;color:var(--accent);text-decoration:none;border-bottom:var(--border-width) solid var(--border);padding-bottom:.15rem;transition:border-color .2s ease}.i-close-links a:hover{border-color:var(--accent);text-decoration:none}@media(max-width:768px){.i-hero{padding:4rem 0 2rem}.i-hero h1{font-size:1.6rem}.i-channels,.i-calibration-grid{grid-template-columns:1fr}.i-constraint{grid-template-columns:1fr;gap:.35rem}.i-stack-row{grid-template-columns:1fr;gap:.25rem}.i-close-links{flex-direction:column;gap:1rem}}