.hp-tool{gap:1rem;max-width:780px;margin:1.5rem auto 3rem;padding:0 1rem;display:grid}.hp-panel{border:1px solid var(--border,#e2e2e2);border-radius:1rem;gap:.75rem;padding:1rem 1.25rem 1.25rem;display:grid}.hp-panel legend{padding:0 .5rem;font-weight:700}.hp-channels{grid-template-columns:repeat(3,1fr);gap:.75rem;display:grid}.hp-channel{border:2px solid var(--border,#e2e2e2);background:var(--surface,#fff);min-height:64px;color:inherit;cursor:pointer;border-radius:.9rem;place-content:center;gap:.15rem;font-size:1rem;font-weight:600;display:grid}.hp-channel span{font-size:1.5rem;font-weight:800}.hp-channel.is-on{border-color:var(--info);background:var(--info-bg);color:var(--info-ink)}.hp-row{gap:.35rem;display:grid}.hp-row label{font-weight:600}.hp-row input[type=range]{width:100%;min-height:44px}.hp-hint{color:var(--muted,#666);margin:0;font-size:.9rem}.hp-actions{flex-wrap:wrap;gap:.75rem;display:flex}.hp-play-balance,.hp-stop,.hp-bass,.hp-sweep-start{cursor:pointer;border-radius:.8rem;min-height:48px;padding:.65rem 1.25rem;font-size:1rem;font-weight:700}.hp-stop,.hp-bass{border:2px solid var(--border,#e2e2e2);background:var(--surface,#fff);color:inherit}.hp-bass.is-on{border-color:var(--info);background:var(--info-bg);color:var(--info-ink)}.hp-sweep-row{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.hp-freq{font-variant-numeric:tabular-nums;font-size:1.4rem;font-weight:800}.hp-sweep-bar{background:var(--border,#e8e8e8);border-radius:999px;height:10px;overflow:hidden}.hp-sweep-bar span{background:var(--info);height:100%;display:block}.hp-status{text-align:center;font-size:1rem}@media (prefers-reduced-motion:reduce){.hp-sweep-bar span{transition:none}}.hp-safety{border:2px solid var(--warn-ink);background:var(--warn-bg);border-radius:.9rem;margin:0;padding:.75rem 1rem;font-weight:600}.hp-wave{border:2px solid var(--border,#c9c9c9);background:var(--surface,#fff);border-radius:.9rem;width:100%;height:120px}.hp-bass-row{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.hp-repeat{cursor:pointer;align-items:center;gap:.5rem;min-height:44px;font-weight:600;display:inline-flex}.hp-repeat input{width:1.25rem;height:1.25rem;accent-color:var(--info)}