.spk-app{--spk-bg:var(--at-page);--spk-card:var(--at-card);--spk-card-hover:var(--at-card-2);--spk-border:var(--at-border);--spk-purple:var(--at-violet);--spk-purple-light:var(--at-violet-text);--spk-purple-glow:var(--at-violet-glow);--spk-cyan:var(--at-brand);--spk-cyan-light:var(--at-brand-text);--spk-cyan-glow:color-mix(in srgb, var(--at-brand) 30%, transparent);--spk-green:var(--at-success);--spk-amber:var(--at-warning);--spk-red:var(--at-danger);--spk-text:var(--at-text);--spk-text-muted:var(--at-body);--spk-text-subtle:var(--at-mute);--spk-mono:ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;--spk-radius-card:24px;--spk-radius-inner:16px;--spk-radius-btn:14px;--spk-shadow-card:0 24px 50px -32px color-mix(in srgb, var(--color-ink) 55%, transparent), inset 0 1px 0 0 #ffffff0d;--spk-shadow-soft:0 14px 32px -22px color-mix(in srgb, var(--color-ink) 45%, transparent);background-color:var(--spk-bg);color:var(--spk-text);min-height:100vh;padding:3rem 1.5rem 4.5rem;font-family:Inter,system-ui,sans-serif;position:relative}:root.dark .spk-app{--spk-shadow-card:0 30px 60px -34px #000000bf, inset 0 1px 0 0 #ffffff0d;--spk-shadow-soft:0 18px 40px -26px #000000b3}.rtk-audio.spk-app{--at-violet:var(--color-link);--at-violet-text:var(--color-link-deep);--at-violet-glow:#ff7a0047;--at-violet-btn-from:#ff8a1f;--at-violet-btn-to:#d96200;--at-violet-btn-hover:#ff7a00;--at-violet-tint:color-mix(in srgb, var(--color-link) 12%, var(--at-card));--at-violet-line:color-mix(in srgb, var(--color-link) 34%, var(--at-border));--at-scope-cyan:#ff9a3d;--at-scope-cyan-deep:#ff7a00;--at-scope-cyan-tint:#ff7a0024;--at-scope-cyan-line:#ff7a0061;--at-scope-violet:#ffb066;--at-scope-violet-deep:#ff7a00;--at-scope-violet-tint:#ff7a0029;--at-scope-violet-line:#ff7a0066}:root.dark .rtk-audio.spk-app{--at-violet:var(--color-link);--at-violet-text:var(--color-accent-bright);--at-violet-glow:#ff8a1f59;--at-violet-tint:color-mix(in srgb, var(--color-link) 16%, var(--at-card));--at-violet-line:color-mix(in srgb, var(--color-link) 40%, var(--at-border))}.spk-glow{background:radial-gradient(50% 50% at 50% 50%, color-mix(in srgb, var(--at-violet) 14%, transparent) 0%, color-mix(in srgb, var(--at-brand) 9%, transparent) 45%, transparent 72%);filter:blur(64px);z-index:0;pointer-events:none;border-radius:999px;width:min(900px,100%);height:520px;position:absolute;top:-200px;left:50%;translate:-50%}.spk-shell{z-index:1;flex-direction:column;gap:1.75rem;max-width:1320px;margin:0 auto;display:flex;position:relative}.spk-hero{text-align:center;margin-bottom:.5rem}.spk-hero-badges{flex-wrap:wrap;justify-content:center;align-items:center;gap:.5rem;margin-bottom:1.25rem;display:flex}.spk-title-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:.85rem;display:flex}.spk-title-icon{background:linear-gradient(135deg, color-mix(in srgb, var(--at-violet) 16%, var(--at-card)), color-mix(in srgb, var(--at-brand) 16%, var(--at-card)));border:1px solid var(--at-violet-line);width:56px;height:56px;color:var(--spk-purple-light);box-shadow:0 10px 30px -16px var(--at-violet-glow);border-radius:16px;justify-content:center;align-items:center;display:inline-flex}.spk-title{letter-spacing:-.03em;color:var(--spk-text);margin:0;font-size:clamp(2.3rem,1.4rem + 4vw,3.6rem);font-weight:800;line-height:1.05}.spk-badge{letter-spacing:.08em;border-radius:999px;padding:.32rem .75rem;font-size:.72rem;font-weight:800}.spk-badge--pro{background:var(--at-violet-tint);color:var(--spk-purple-light);border:1px solid var(--at-violet-line)}.spk-status-dot-badge{letter-spacing:.06em;color:var(--spk-green);background:var(--at-success-tint);border:1px solid var(--at-success-line);border-radius:999px;align-items:center;gap:.45rem;padding:.32rem .75rem;font-size:.72rem;font-weight:800;display:inline-flex}.spk-dot{background-color:currentColor;border-radius:50%;width:7px;height:7px;box-shadow:0 0 8px}.spk-subtitle{color:var(--spk-text-muted);max-width:44rem;margin:.9rem auto 0;font-size:1.05rem;line-height:1.6}.spk-hero-actions{justify-content:center;align-items:center;margin-top:1.25rem;display:flex}.spk-privacy-pill{letter-spacing:.04em;background:var(--at-success-tint);color:var(--spk-green);border:1px solid var(--at-success-line);border-radius:999px;align-items:center;gap:.45rem;padding:.4rem .85rem;font-size:.72rem;font-weight:700;display:inline-flex}.spk-privacy-dot{background-color:currentColor;border-radius:50%;width:7px;height:7px;box-shadow:0 0 8px}.spk-nodownload-pill{background:var(--at-tint-fill);border:1px solid var(--spk-border);color:var(--spk-text-subtle);border-radius:999px;padding:.4rem .7rem;font-size:.72rem;font-weight:700}.spk-btn-icon{background:var(--spk-card);border:1px solid var(--spk-border);border-radius:var(--spk-radius-btn);width:46px;height:46px;color:var(--spk-text-muted);cursor:pointer;box-shadow:var(--spk-shadow-soft);justify-content:center;align-items:center;transition:all .18s;display:inline-flex}.spk-btn-icon:hover{color:var(--spk-text);border-color:var(--spk-purple-light);background:var(--spk-card-hover)}.spk-safe-banner{background:var(--at-brand-tint);border:1px solid var(--at-brand-line);color:var(--at-info-text);box-shadow:var(--spk-shadow-soft);border-radius:16px;align-items:center;gap:.85rem;padding:.95rem 1.2rem;font-size:.9rem;display:flex}.spk-safe-icon{color:var(--spk-cyan-light);flex-shrink:0}.spk-safe-text{flex:1;line-height:1.5}.spk-paused-banner{background:var(--at-warning-tint);border:1px solid var(--at-warning-line);color:var(--at-warning-text);border-radius:16px;align-items:center;gap:.6rem;padding:.9rem 1.2rem;font-size:.85rem;display:flex}.spk-paused-banner[hidden]{display:none!important}.spk-pause-dot{background:var(--spk-amber);border-radius:50%;width:9px;height:9px;animation:1.2s infinite spkPulse}@keyframes spkPulse{0%,to{opacity:1}50%{opacity:.3}}.spk-card{background:var(--spk-card);border:1px solid var(--spk-border);border-radius:var(--spk-radius-card);box-shadow:var(--spk-shadow-card);position:relative;overflow:hidden}.spk-card-head{border-bottom:1px solid var(--spk-border);background:color-mix(in srgb, var(--at-tint-fill) 60%, var(--spk-card));justify-content:space-between;align-items:center;padding:1.1rem 1.6rem;display:flex}.spk-panel-kicker{font-family:var(--spk-mono);letter-spacing:.1em;color:var(--spk-purple-light);font-size:.78rem;font-weight:800}.spk-grid{grid-template-columns:minmax(0,1fr) 360px;align-items:start;gap:1.75rem;display:grid}.spk-col-main,.spk-col-side{flex-direction:column;gap:1.75rem;display:flex}.spk-test-topbar{background:color-mix(in srgb, var(--at-tint-fill) 70%, var(--spk-card));border-bottom:1px solid var(--spk-border);grid-template-columns:repeat(5,1fr);display:grid}.spk-topbar-cell{border-right:1px solid var(--spk-border);flex-direction:column;justify-content:center;align-items:center;gap:.3rem;padding:.95rem .4rem;display:flex}.spk-topbar-cell:last-child{border-right:none}.spk-top-lbl{letter-spacing:.08em;color:var(--spk-text-subtle);text-transform:uppercase;font-size:.66rem;font-weight:700}.spk-top-val{font-size:1rem;font-family:var(--spk-mono);color:var(--spk-text);font-weight:700}.spk-top-val--cyan{color:var(--spk-cyan-light);font-weight:800}.spk-status--ready{color:var(--spk-green)}.spk-status--playing{color:var(--spk-cyan-light);font-weight:800}.spk-status--paused{color:var(--spk-amber)}.spk-status--stopped{color:var(--spk-text-muted)}.spk-viewport-wrapper{background:radial-gradient(circle at center, #ff7a0014 0%, var(--at-scope-bg) 80%);border-bottom:1px solid var(--at-scope-border);height:420px;position:relative;overflow:hidden}.spk-main-canvas{width:100%;height:100%;display:block}.spk-vp-overlay-bar{z-index:3;pointer-events:none;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;display:flex;position:absolute;top:.9rem;left:1.1rem;right:1.1rem}.spk-vp-modes{pointer-events:auto;gap:.4rem;display:flex}.spk-vp-mode-btn{background:var(--at-scope-panel);backdrop-filter:blur(8px);border:1px solid var(--at-scope-line);color:var(--at-scope-muted);cursor:pointer;border-radius:10px;padding:.4rem .8rem;font-size:.72rem;font-weight:700;transition:all .15s}.spk-vp-mode-btn:hover{color:var(--at-scope-text)}.spk-vp-mode-btn.is-active{background:var(--at-scope-cyan-tint);border-color:var(--at-scope-cyan-deep);color:var(--at-scope-cyan)}.spk-vp-telemetry{background:var(--at-scope-panel);backdrop-filter:blur(8px);border:1px solid var(--at-scope-line);color:var(--at-scope-muted);font-size:.74rem;font-family:var(--spk-mono);border-radius:10px;align-items:center;gap:.5rem;padding:.4rem .85rem;display:flex}.spk-vp-telemetry strong{color:var(--at-scope-text)}.spk-vp-sep{color:var(--at-scope-subtle)}.spk-speaker-indicators{background:var(--at-scope-panel);backdrop-filter:blur(8px);border:1px solid var(--at-scope-border);z-index:3;border-radius:12px;gap:1.5rem;padding:.5rem 1rem;display:flex;position:absolute;bottom:1.1rem;left:1.1rem}.spk-ind-item{align-items:center;gap:.55rem;display:flex}.spk-ind-lbl{letter-spacing:.05em;color:var(--at-scope-subtle);font-size:.7rem;font-weight:700}.spk-ind-dot{background:var(--at-scope-fill-2);border:1px solid var(--at-scope-border);border-radius:50%;width:12px;height:12px;transition:all .15s}.spk-ind-dot.is-active{background:var(--at-scope-cyan);border-color:var(--at-scope-cyan-deep);box-shadow:0 0 12px #ff7a0099}.spk-center-state{z-index:4;text-align:center;background:var(--at-scope-panel);border:1px solid var(--at-scope-border);backdrop-filter:blur(10px);width:calc(100% - 2.5rem);max-width:540px;box-shadow:var(--at-scope-shadow);border-radius:20px;flex-direction:column;align-items:center;padding:2.5rem 2rem;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.spk-center-state[hidden]{display:none!important}.spk-ready-halo{background:var(--at-scope-violet-tint);border:1px solid var(--at-scope-violet-line);width:84px;height:84px;color:var(--at-scope-violet);border-radius:50%;justify-content:center;align-items:center;margin-bottom:1.5rem;display:flex;box-shadow:0 0 36px #ff7a0066}.spk-ready-halo svg{width:44px;height:44px}.spk-ready-title{letter-spacing:-.02em;color:var(--at-scope-text);margin:0 0 .6rem;font-size:1.9rem;font-weight:800}.spk-ready-desc{color:var(--at-scope-muted);max-width:36ch;margin:0 0 1.5rem;font-size:.98rem;line-height:1.55}.spk-ready-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;display:flex}.spk-center-state .spk-btn-outline{background:var(--at-scope-fill);border-color:var(--at-scope-line);color:var(--at-scope-text)}.spk-center-state .spk-btn-outline:hover{background:var(--at-scope-fill-2);border-color:var(--at-scope-cyan-deep)}.spk-meters-row{background:color-mix(in srgb, var(--at-tint-fill) 70%, var(--spk-card));border-bottom:1px solid var(--spk-border);grid-template-columns:1fr 1fr;gap:1.25rem;padding:1rem 1.6rem;display:grid}.spk-meter-unit{flex-direction:column;gap:.4rem;display:flex}.spk-meter-header{justify-content:space-between;align-items:center;font-size:.72rem;display:flex}.spk-meter-lbl{color:var(--spk-text-subtle);letter-spacing:.04em;font-weight:700}.spk-meter-db{font-family:var(--spk-mono);color:var(--spk-cyan-light);font-weight:700}.spk-meter-track{background:var(--at-card-2);border-radius:999px;width:100%;height:10px;overflow:hidden}.spk-meter-fill{background:linear-gradient(90deg, var(--at-scope-cyan-deep) 0%, var(--at-scope-cyan) 70%, #ef4444 100%);height:100%;transition:width 80ms}.spk-fs-overlay{z-index:9999;background:var(--at-scope-panel);backdrop-filter:blur(12px);border:1px solid var(--at-scope-line);border-radius:100px;align-items:center;gap:1.25rem;padding:.65rem 1.25rem;transition:opacity .4s,transform .4s;display:flex;position:fixed;bottom:2rem;left:50%;transform:translate(-50%);box-shadow:0 8px 30px #000000b3}.spk-fs-overlay.is-faded{opacity:0;pointer-events:none;transform:translate(-50%)translateY(10px)}.spk-tool-container:not(.is-fullscreen) .spk-fs-overlay{display:none}.spk-tool-container.is-fullscreen{z-index:9998;width:100vw;height:100vh;padding:0;position:fixed;top:0;left:0}.spk-tool-container.is-fullscreen .spk-shell{max-width:none;height:100vh}.spk-tool-container.is-fullscreen .spk-hero,.spk-tool-container.is-fullscreen .spk-safe-banner,.spk-tool-container.is-fullscreen .spk-col-side,.spk-tool-container.is-fullscreen .spk-quick-card,.spk-tool-container.is-fullscreen .spk-channels-card,.spk-tool-container.is-fullscreen .spk-controls-card,.spk-tool-container.is-fullscreen .spk-freq-card,.spk-tool-container.is-fullscreen .spk-sweep-card,.spk-tool-container.is-fullscreen .spk-bands-card,.spk-tool-container.is-fullscreen .spk-chanid-card,.spk-tool-container.is-fullscreen .spk-guide-section,.spk-tool-container.is-fullscreen .spk-cta-section{display:none!important}.spk-tool-container.is-fullscreen .spk-grid{grid-template-columns:1fr;height:100vh}.spk-tool-container.is-fullscreen .spk-vis-card{height:100vh;box-shadow:none;border:none;border-radius:0}.spk-tool-container.is-fullscreen .spk-test-topbar{display:none}.spk-tool-container.is-fullscreen .spk-viewport-wrapper{height:calc(100vh - 120px)}.spk-fs-info{font-size:.8rem;font-family:var(--spk-mono);align-items:center;gap:.5rem;display:flex}.spk-fs-tag{color:var(--at-scope-violet);font-weight:700}.spk-fs-sep{color:var(--at-scope-subtle)}.spk-fs-meta{color:var(--at-scope-muted)}.spk-fs-meta strong{color:var(--at-scope-text)}.spk-fs-controls{align-items:center;gap:.5rem;display:flex}.spk-fs-btn{background:var(--at-scope-fill-2);border:1px solid var(--at-scope-line);color:var(--at-scope-text);cursor:pointer;border-radius:100px;padding:.35rem .85rem;font-size:.78rem;font-weight:600;transition:all .15s}.spk-fs-btn:hover{border-color:var(--at-scope-violet);background:#ff7a0038}.spk-fs-btn--exit{background:var(--at-scope-red-tint);border-color:var(--at-scope-red-line);color:#fca5a5}.spk-actions-strip{border-top:1px solid var(--spk-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.85rem;padding:1.1rem 1.6rem;display:flex}.spk-actions-left{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.spk-quick-body{flex-direction:column;gap:1.1rem;padding:1.4rem;display:flex}.spk-quick-meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;display:flex}.spk-quick-step-label{color:var(--spk-text);font-size:1rem;font-family:var(--spk-mono);font-weight:700}.spk-quick-timer-badge{font-size:.8rem;font-family:var(--spk-mono);color:var(--spk-cyan-light);background:var(--at-brand-tint);border:1px solid var(--at-brand-line);border-radius:8px;padding:.3rem .7rem;font-weight:700}.spk-quick-controls{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.spk-channels-grid{grid-template-columns:repeat(4,1fr);gap:1rem;padding:1.4rem;display:grid}.spk-chan-box{background:color-mix(in srgb, var(--at-tint-fill) 60%, var(--spk-card));border:1px solid var(--spk-border);border-radius:var(--spk-radius-inner);text-align:center;flex-direction:column;align-items:center;gap:.5rem;padding:1.25rem 1rem;display:flex}.spk-chan-title{color:var(--spk-text);font-size:1rem;font-weight:700}.spk-chan-desc{color:var(--spk-text-subtle);margin:0 0 .5rem;font-size:.78rem;line-height:1.45}.spk-controls-body{flex-direction:column;gap:1.5rem;padding:1.4rem;display:flex}.spk-slider-unit{flex-direction:column;gap:.6rem;display:flex}.spk-slider-head{justify-content:space-between;align-items:center;display:flex}.spk-ctrl-lbl{letter-spacing:.06em;color:var(--spk-text-subtle);text-transform:uppercase;font-size:.78rem;font-weight:700}.spk-slider-readout{font-family:var(--spk-mono);color:var(--spk-text);font-size:.95rem;font-weight:700}.spk-range-slider{width:100%;accent-color:var(--spk-purple);cursor:pointer;height:8px}.spk-slider-presets{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.spk-freq-body{flex-direction:column;gap:1.1rem;padding:1.4rem;display:flex}.spk-sub-group{flex-direction:column;gap:.5rem;display:flex}.spk-pills-wrap{flex-wrap:wrap;gap:.5rem;display:flex}.spk-pill-btn{background:var(--at-chip);border:1px solid var(--spk-border);color:var(--spk-text-muted);cursor:pointer;border-radius:12px;min-height:40px;padding:.5rem .95rem;font-size:.82rem;font-weight:700;transition:all .15s}.spk-pill-btn:hover{color:var(--spk-text);border-color:var(--at-line-hover);background:var(--at-hover-fill)}.spk-pill-btn.is-active{background:var(--at-brand-tint);border-color:var(--spk-cyan);color:var(--spk-cyan-light);box-shadow:0 4px 14px -8px var(--spk-cyan-glow)}.spk-freq-pills-grid{grid-template-columns:repeat(6,1fr);gap:.5rem;display:grid}.spk-freq-btn{background:var(--at-chip);border:1px solid var(--spk-border);font-size:.8rem;font-family:var(--spk-mono);color:var(--spk-text-muted);cursor:pointer;text-align:center;border-radius:12px;padding:.6rem .2rem;font-weight:700;transition:all .15s}.spk-freq-btn:hover{color:var(--spk-text);border-color:var(--spk-cyan);background:var(--at-hover-fill)}.spk-freq-btn.is-active{background:var(--at-violet-tint);border-color:var(--spk-purple);color:var(--spk-purple-light);box-shadow:0 4px 14px -8px var(--spk-purple-glow)}.spk-sweep-body{flex-direction:column;gap:1rem;padding:1.4rem;display:flex}.spk-sweep-desc{color:var(--spk-text-muted);margin:0;font-size:.88rem;line-height:1.55}.spk-sweep-buttons{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.spk-bands-body{flex-direction:column;gap:1.25rem;padding:1.4rem;display:flex}.spk-band-unit{flex-direction:column;gap:.5rem;display:flex}.spk-band-title{color:var(--spk-text);font-size:.85rem;font-weight:700}.spk-chanid-body{flex-direction:column;gap:.85rem;padding:1.4rem;display:flex}.spk-chanid-desc{color:var(--spk-text-muted);margin:0;font-size:.88rem;line-height:1.55}.spk-chanid-actions{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.spk-chanid-choices{gap:.5rem;display:flex}.spk-feedback-text{font-size:.85rem;font-family:var(--spk-mono);color:var(--spk-text-subtle);background:color-mix(in srgb, var(--at-tint-fill) 60%, var(--spk-card));border:1px solid var(--spk-border);border-radius:12px;padding:.6rem .9rem}.spk-feedback--correct{color:var(--spk-green);border-color:var(--at-success-line);background:var(--at-success-tint)}.spk-feedback--wrong{color:var(--at-danger-text);border-color:var(--at-danger-line);background:var(--at-danger-tint)}.spk-feedback--listening{color:var(--spk-cyan-light);border-color:var(--at-brand-line);background:var(--at-brand-tint)}.spk-device-body,.spk-obs-body,.spk-check-body,.spk-notes-body{flex-direction:column;gap:.85rem;padding:1.4rem;display:flex}.spk-select{background:var(--at-card-2);border:1px solid var(--spk-border);width:100%;color:var(--spk-text);border-radius:12px;padding:.6rem .7rem;font-size:.82rem}.spk-subtle-hint{color:var(--spk-text-subtle);font-size:.72rem}.spk-obs-unit{flex-direction:column;gap:.4rem;display:flex}.spk-obs-unit:not(:first-child){border-top:1px solid var(--spk-border);padding-top:.75rem}.spk-check-list{flex-direction:column;gap:.5rem;display:flex}.spk-check-item{color:var(--spk-text-muted);cursor:pointer;align-items:center;gap:.6rem;font-size:.82rem;display:flex}.spk-check-item input[type=checkbox]{accent-color:var(--spk-purple);width:17px;height:17px}.spk-notes-textarea{background:var(--at-card-2);border:1px solid var(--spk-border);width:100%;height:85px;color:var(--spk-text);resize:none;border-radius:12px;padding:.6rem;font-family:inherit;font-size:.82rem}.spk-notes-textarea::placeholder{color:var(--spk-text-subtle)}.spk-notes-textarea:focus{border-color:var(--spk-purple-light);box-shadow:0 0 0 3px color-mix(in srgb, var(--spk-purple) 18%, transparent);outline:none}.spk-sum-grid{grid-template-columns:repeat(4,1fr);gap:.6rem;padding:1.4rem;display:grid}.spk-sum-cell{background:color-mix(in srgb, var(--at-tint-fill) 60%, var(--spk-card));border:1px solid 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