:root{color:#f1f0ec;font-synthesis:none;text-rendering:optimizelegibility;--surface:#16181b;--border:#41454a;--muted:#a8a7a2;--accent:#ffc135;--accent-dark:#503d12;--sonolabs-blue:#07698d;--sonolabs-yellow:#ffc135;background:#0b0c0e;font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}.app-header{justify-content:space-between;align-items:center;gap:1.25rem;width:min(1380px,100% - 3rem);margin:0 auto;padding:.75rem 0;display:flex}.eyebrow,.section-kicker{color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin:0 0 .5rem;font-size:.72rem;font-weight:800}h1{letter-spacing:-.035em;margin:0;font-size:clamp(1.15rem,2.4vw,1.75rem)}.app-header>div>p:last-child{max-width:680px;color:var(--muted);margin:.8rem 0 0;line-height:1.5}.reset-button{color:#dcebed;border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:10px;padding:.72rem 1.1rem}.reset-button:hover{border-color:var(--accent)}.clinical-header{border-bottom:1px solid #ffc13533}.sonolabs-brand{align-items:center;gap:.7rem;min-width:0;display:flex}.sonolabs-brand img{object-fit:cover;border-radius:10px;width:46px;height:46px;box-shadow:0 0 0 1px #ffc13573,0 5px 16px #0000004d}.sonolabs-brand .eyebrow{color:var(--sonolabs-yellow);margin-bottom:.15rem}.clinical-actions{justify-content:flex-end;align-items:center;gap:.45rem;display:flex}.clinical-actions button{color:#ecebe7;cursor:pointer;background:#181a1d;border:1px solid #45494e;border-radius:8px;min-height:36px}.interface-mode{background:#101113;border:1px solid #3b3e42;border-radius:9px;padding:3px;display:flex}.interface-mode button{text-transform:uppercase;background:0 0;border:0;min-height:28px;padding:.25rem .65rem;font-size:.72rem}.interface-mode button[aria-pressed=true]{color:#07141a;background:var(--sonolabs-yellow);font-weight:850}.freeze-button{letter-spacing:.08em;min-width:74px;padding:.45rem .7rem;font-size:.72rem;font-weight:900;color:#08151a!important;background:var(--sonolabs-yellow)!important;border-color:#ffe18e!important}.freeze-button.active{color:#fff!important;background:#a72828!important;border-color:#ff6d6d!important}.info-button{width:36px;padding:0;font-weight:900;color:var(--sonolabs-yellow)!important;border-radius:50%!important;font-family:Georgia,serif!important;font-size:1.15rem!important}.simulator-shell{flex-direction:column;width:min(1380px,100% - 3rem);margin:0 auto;padding-bottom:4rem;display:flex}.ultrasound-console{order:1}.clinical-display{order:2}.parameter-bar{order:3}.pw-control-deck{order:4}.physics-workbench{order:5}.drawer-grid{order:6}.control-drawer{order:7}.science-note{order:8}.clinical-display{background:#08090b;border:1px solid #4b4e52;border-radius:8px;margin-bottom:.45rem;overflow:hidden;box-shadow:0 18px 55px #00000061}.display-header{color:#aaa9a5;letter-spacing:.08em;text-transform:uppercase;background:#17191c;border-bottom:1px solid #3d4044;justify-content:space-between;align-items:center;gap:1rem;min-height:36px;padding:.45rem .8rem;font-size:.68rem;display:flex}.display-header div{color:var(--sonolabs-yellow);align-items:center;gap:.45rem;font-weight:850;display:flex}.display-header strong{color:#d7e1e4;text-overflow:ellipsis;white-space:nowrap;font-size:.72rem;overflow:hidden}.live-indicator{background:var(--sonolabs-yellow);width:7px;height:7px;box-shadow:0 0 8px var(--sonolabs-yellow);border-radius:50%}.duplex-grid{background:#0b0c0e;grid-template-columns:minmax(320px,.9fr) minmax(480px,1.35fr);align-items:start;gap:1px;display:grid}.duplex-grid>.panel{min-width:0;box-shadow:none;background:#0b0c0e;border:0;border-radius:0;padding:.85rem}.duplex-grid .panel-heading{margin-bottom:.55rem}.duplex-grid .spectral-panel{grid-column:auto}.duplex-grid .spectral-canvas{min-height:260px}.duplex-grid .color-canvas{height:auto;min-height:0}.mode-off{color:#65767c;text-align:center;background:#030b0f;place-content:center;min-height:360px;display:grid}.mode-off strong{font-size:2.5rem}.mode-off span{text-transform:uppercase;margin-top:.4rem;font-size:.75rem}.parameter-bar{color:#c2c0ba;scrollbar-width:thin;background:#17191c;border:1px solid #44474b;border-radius:7px;align-items:center;gap:0;margin-bottom:.65rem;display:flex;overflow-x:auto}.parameter-bar span{white-space:nowrap;border-right:1px solid #383b3f;flex:none;padding:.55rem .8rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.72rem}.parameter-bar b{color:var(--sonolabs-yellow)}.brand-readout{color:#dce8eb;background:#063e55}.physics-workbench{background:linear-gradient(145deg,#1c1e21,#111214);border:1px solid #5b522f;border-radius:14px;margin-bottom:.75rem;padding:1rem;box-shadow:inset 0 0 0 1px #ffc1350d}.workbench-heading{justify-content:space-between;align-items:end;gap:1.5rem;margin-bottom:.85rem;display:flex}.workbench-heading h2{margin:0;font-size:1.2rem}.workbench-heading>p{color:#9fb2b8;text-align:right;max-width:520px;margin:0;font-size:.78rem}.physics-workbench .panel{padding:1rem}.physics-workbench .physical-scene{min-height:290px}.physics-workbench .control-strip{box-shadow:none;background:#141618;border-radius:10px;margin:.85rem 0;padding:.85rem 1rem}.physics-workbench .flow-controls{gap:.75rem;margin:0}.physics-workbench .velocity-control,.physics-workbench .direction-control,.physics-workbench .vessel-control{background:#141618;border-radius:10px;padding:.75rem .85rem}.ultrasound-console{color:#edf5f6;grid-template-columns:repeat(3,110px);justify-content:center;align-items:start;gap:.75rem;width:max-content;max-width:100%;margin:0 auto .65rem;display:grid}.rotary-control{justify-items:center;gap:.35rem;display:grid}.rotary-knob{color:#f6f8f9;cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;background:radial-gradient(circle at 38% 32%,#4a5054 0,#24292d 55%,#111416 100%);border:7px solid #252a2e;border-radius:50%;place-items:center;width:82px;height:82px;padding:0;display:grid;position:relative;box-shadow:0 0 0 3px #0e1113,0 0 0 4px #747c80,inset 0 2px 4px #ffffff29,0 7px 13px #0006}.rotary-knob.active{box-shadow:0 0 0 3px #0e1113,0 0 0 6px var(--sonolabs-yellow),0 0 20px #ffc13552,inset 0 2px 4px #ffffff2e,0 8px 16px #0006;border-color:#4b555a}.rotary-label{letter-spacing:-.04em;font-size:1.35rem;font-weight:850}.rotary-arc{font-size:1.6rem;font-weight:900;line-height:.4;position:absolute;bottom:10px}.rotary-indicator{transform-origin:2px 34px;background:#fff;border-radius:3px;width:3px;height:32px;position:absolute;top:5px;left:34px;box-shadow:0 0 5px #fff}.rotary-readout{align-items:baseline;gap:.45rem;display:flex}.rotary-readout strong{color:var(--sonolabs-yellow);font-size:.9rem}.rotary-readout span{color:#aeb9bd;text-transform:uppercase;font-size:.68rem}.rotary-stepper{gap:.35rem;display:flex}.rotary-stepper button{color:#dce6e8;cursor:pointer;background:#171b1e;border:1px solid #555e63;border-radius:5px;width:28px;height:24px;padding:0}.future-mode{opacity:.55}.future-mode .rotary-knob{cursor:default}.clinical-mode .clinical-display{order:2}.clinical-mode .duplex-grid .color-canvas{height:auto;min-height:0}.clinical-mode .duplex-grid .spectral-canvas{min-height:clamp(300px,38vh,470px)}.spectral-canvas[title]{cursor:ns-resize;touch-action:none}.clinical-mode .pw-control-deck{border-radius:8px;padding:.65rem}.clinical-mode .pw-deck-heading{margin-bottom:.45rem}.clinical-mode .pw-deck-heading h2{font-size:.88rem}.clinical-mode .pw-deck-heading .section-kicker{display:none}.clinical-mode .pw-control-tiles{gap:.4rem}.clinical-mode .pw-control-tiles button{grid-template-columns:58px minmax(0,1fr);padding:.35rem}.clinical-mode .pw-control-icon{width:58px;height:48px}.clinical-mode .pw-selected-control{padding:.55rem .7rem}.guide-backdrop{z-index:50;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#00070ac7;place-items:center;padding:1rem;display:grid;position:fixed;inset:0}.simulator-guide{color:#f0efeb;background:linear-gradient(145deg,#1d1f22,#101113);border:1px solid #52555a;border-radius:16px;width:min(820px,100%);max-height:min(88vh,900px);overflow:auto;box-shadow:0 30px 90px #0009}.simulator-guide>header{border-bottom:3px solid var(--sonolabs-yellow);background:#07698d;grid-template-columns:58px 1fr auto;align-items:center;gap:.85rem;padding:1rem 1.15rem;display:grid}.simulator-guide>header img{object-fit:cover;border-radius:50%;width:58px;height:58px}.simulator-guide>header p{color:#ffe39a;letter-spacing:.09em;text-transform:uppercase;margin:0 0 .15rem;font-size:.7rem;font-weight:850}.simulator-guide>header h2{margin:0;font-size:1.25rem}.simulator-guide>header button{color:#fff;cursor:pointer;background:#00000038;border:1px solid #ffffff59;border-radius:50%;align-self:start;width:34px;height:34px;padding:0;font-size:1.45rem;line-height:1}.guide-intro{color:#f7e3ae;border-left:3px solid var(--sonolabs-yellow);background:#ffc1351a;margin:1rem 1rem 0;padding:.8rem 1rem;line-height:1.45}.guide-steps{grid-template-columns:1fr 1fr;gap:.7rem;padding:1rem;display:grid}.guide-steps article{background:#151719;border:1px solid #42454a;border-radius:10px;padding:.85rem}.guide-steps h3{color:var(--sonolabs-yellow);margin:0 0 .4rem;font-size:.9rem}.guide-steps p{color:#b9cbd0;margin:0;font-size:.82rem;line-height:1.5}.simulator-guide aside{color:#c7c5be;background:#111214;border-radius:8px;margin:0 1rem 1rem;padding:.8rem;font-size:.78rem;line-height:1.45}.simulator-guide aside strong{color:#fff}.pw-control-deck{color:#efeeea;background:linear-gradient(145deg,#25272a,#151618);border:1px solid #52555a;border-radius:14px;margin-bottom:.75rem;padding:1rem;box-shadow:inset 0 1px #ffffff12}.pw-deck-heading{justify-content:space-between;align-items:start;gap:1rem;margin-bottom:.75rem;display:flex}.pw-deck-heading h2{margin:0;font-size:1.05rem}.pw-deck-heading>span{color:var(--sonolabs-yellow);letter-spacing:.06em;text-transform:uppercase;font-size:.68rem;font-weight:800}.pw-control-tiles{grid-template-columns:repeat(7,minmax(0,1fr));gap:.65rem;display:grid}.color-control-tiles{grid-template-columns:repeat(3,minmax(0,1fr))}.pw-control-tiles button{color:#aab8bd;cursor:pointer;text-align:left;background:#0d1418;border:1px solid #424e54;border-radius:10px;grid-template-rows:auto auto;grid-template-columns:82px minmax(0,1fr);align-items:center;gap:.15rem .7rem;min-width:0;padding:.55rem;display:grid}.pw-control-tiles button.selected{color:#fff7dc;border-color:var(--sonolabs-yellow);box-shadow:inset 0 0 0 1px #ffc13559,0 0 14px #ffc1351f}.pw-control-tiles button>span{letter-spacing:.06em;text-transform:uppercase;align-self:end;font-size:.72rem;font-weight:850}.pw-control-tiles button>strong{color:#ffd56a;text-overflow:ellipsis;white-space:nowrap;align-self:start;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.74rem;overflow:hidden}.pw-control-icon{grid-row:1/3;width:82px;height:62px}.icon-frame{fill:#061015;stroke:#5b6a70;stroke-width:1.5px}.icon-baseline{stroke:#e6ecee;stroke-width:1.5px}.icon-wave{fill:none;stroke:#f1ede2;stroke-width:3px}.icon-wave.warning{stroke:#ff9f43}.icon-scale-arrow{fill:none;stroke:#7e9299;stroke-width:1.5px}.icon-vessel{fill:#071117;stroke:#596a71;stroke-width:2px}.icon-gate,.icon-gate-cap{stroke:#ffd166;stroke-width:4px}.icon-gate-cap{stroke-width:2px}.icon-vessel-axis{stroke:#83969d;stroke-width:3px}.icon-physical-angle{stroke:#728991;stroke-width:3px;stroke-dasharray:4 3}.icon-correction-angle{stroke-width:4px}.icon-correction-angle.aligned{stroke:var(--sonolabs-yellow)}.icon-correction-angle.caution{stroke:#ffd166}.icon-correction-angle.warning{stroke:#ff9f43}.acquisition-toolbar{color:#b9cbd2;letter-spacing:.08em;justify-content:center;align-items:center;gap:.65rem;margin:.55rem 0;font-size:.72rem;font-weight:800;display:flex}.acquisition-toolbar button{color:#ffe969;background:linear-gradient(#3a3c3f,#202225);border:1px solid #5a5d61;border-radius:7px;width:42px;height:34px;font-size:1.25rem;box-shadow:inset 0 1px #74777a,0 2px 4px #0008}.acquisition-toolbar button:disabled{opacity:.35}.acquisition-toolbar output{color:#ffe969;text-align:center;min-width:44px;font-size:.9rem}.acquisition-toolbar strong{color:#f5f1e7;white-space:nowrap;letter-spacing:0}.acquisition-toolbar small{color:#91a5ad;letter-spacing:0;font-weight:600}.angle-preset-group{grid-column:1/-1;grid-template-columns:repeat(5,1fr);gap:.45rem;display:grid}.angle-preset-group button{color:#eceae4;background:#1c1e20;border:1px solid #55585c;border-radius:7px;min-height:38px;font-weight:800}.angle-preset-group button[aria-pressed=true]{color:#ffe969;background:#3a321c;border-color:#ffe969;box-shadow:0 0 0 1px #ffe96955}.icon-angle-origin{fill:#f2f6f7}.icon-rotary-body{fill:#172126;stroke:#65757c;stroke-width:4px}.icon-rotary-body.warning{stroke:#ff9f43}.icon-rotary-indicator{stroke:#f5f8f8;stroke-width:3px;stroke-linecap:round}.icon-rotary-label{fill:#dfe9eb;font-size:14px;font-weight:850}.icon-color-toward{fill:#b51e45;opacity:.9}.icon-color-away{fill:#315bd8;opacity:.9}.icon-color-sample{fill:#ffd166;stroke:#fff4c2;stroke-width:1px}.icon-color-sample.warning{fill:#ff9f43}.icon-audio-speaker{fill:#63747a;stroke:#9babb0;stroke-width:2px}.icon-audio-speaker.active{fill:#ffc135;stroke:#fff4c2}.icon-audio-wave{fill:none;stroke:#ffd56a;stroke-width:4px;stroke-linecap:round}.icon-audio-muted{stroke:#ff9f43;stroke-width:5px;stroke-linecap:round}.pw-selected-control{background:#121416;border:1px solid #46494d;border-radius:9px;grid-template-columns:auto 90px minmax(220px,1fr);align-items:center;gap:.55rem 1rem;margin-top:.75rem;padding:.75rem .85rem;display:grid}.pw-selected-control label{font-size:.78rem;font-weight:800}.pw-selected-control output{color:#ffd56a;text-align:right;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;font-weight:800}.pw-selected-control input{width:100%;accent-color:var(--sonolabs-yellow)}.pw-selected-control small{color:#8fa1a7;grid-column:3;font-size:.7rem}.audio-toggle{color:#fff7dc;cursor:pointer;background:#332b16;border:1px solid #8b712a;border-radius:7px;grid-row:1/3;padding:.55rem .7rem}.audio-toggle:disabled{opacity:.55;cursor:not-allowed}.audio-toggle+label{grid-column:2}.audio-toggle+label+output{grid-column:3}#quick-audio-volume,#quick-audio-volume+small{grid-column:2/4}.drawer-grid{grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:.75rem;display:grid}.learning-drawer,.control-drawer{color:#ecebe7;background:#17191b;border:1px solid #46494d;border-radius:10px}.learning-drawer summary,.control-drawer summary{cursor:pointer;justify-content:space-between;align-items:center;gap:1rem;min-height:58px;padding:.75rem 1rem;list-style:none;display:flex}.learning-drawer summary::-webkit-details-marker{display:none}.control-drawer summary::-webkit-details-marker{display:none}.learning-drawer summary:after,.control-drawer summary:after{content:"⌄";color:var(--sonolabs-yellow);font-size:1.2rem;transition:transform .18s}.learning-drawer[open] summary:after,.control-drawer[open] summary:after{transform:rotate(180deg)}.learning-drawer summary>span:first-child,.control-drawer summary>span:first-child{flex-direction:column;gap:.2rem;display:flex}.learning-drawer summary strong,.control-drawer summary strong{text-transform:uppercase;letter-spacing:.06em;font-size:.85rem}.learning-drawer summary small,.control-drawer summary small{color:#8fa3aa;font-size:.72rem}.drawer-status{color:#efc27c;text-transform:uppercase;margin-left:auto;font-size:.68rem}.drawer-body,.control-drawer-body{border-top:1px solid #3d4043;padding:0 1rem 1rem}.artifact-picker{color:#9fb1b7;justify-content:space-between;align-items:center;gap:1rem;padding:.8rem 0;font-size:.76rem;font-weight:750;display:flex}.artifact-picker select{color:#efeeea;background:#151719;border:1px solid #4d5054;border-radius:7px;min-width:min(100%,330px);padding:.55rem 2rem .55rem .7rem}.artifact-drawer .artifact-panel{margin:0}.physics-drawer-body .hemodynamic-panel{margin-top:1rem}.control-drawer{margin-bottom:1.25rem}.control-drawer-body{padding-top:1rem}.control-drawer-body>:last-child{margin-bottom:0}.technical-summary{color:#a9bbc0;margin:1rem 0 0;font-size:.82rem;line-height:1.5}.control-strip,.panel{border:1px solid var(--border);background:linear-gradient(145deg,#1e2023fa,#0f1012fc);border-radius:18px;box-shadow:0 18px 55px #00000029}.control-strip{grid-template-columns:minmax(230px,1fr) auto minmax(320px,2fr);align-items:center;gap:1.5rem;margin-bottom:1.25rem;padding:1.25rem 1.5rem;display:grid}.control-strip label{font-weight:750}.control-strip p{color:var(--muted);margin:.3rem 0 0;font-size:.86rem}.control-strip output{min-width:3ch;color:var(--accent);text-align:right;font-size:2rem;font-weight:800}.control-strip input{width:100%;accent-color:var(--accent);cursor:ew-resize}.range-labels{color:var(--muted);grid-column:3;justify-content:space-between;font-size:.72rem;display:flex}.flow-controls{grid-template-columns:minmax(210px,.7fr) minmax(330px,1.4fr) minmax(300px,.8fr);gap:1.25rem;margin-bottom:1.25rem;display:grid}.velocity-control,.direction-control,.vessel-control{border:1px solid var(--border);background:#191b1de0;border-radius:14px;min-width:0;margin:0;padding:1rem 1.25rem}.velocity-control{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:.75rem 1rem;display:grid}.velocity-control label,.direction-control legend,.vessel-control legend{font-size:.86rem;font-weight:750}.velocity-control p{color:var(--muted);margin:.25rem 0 0;font-size:.76rem}.velocity-control output{color:var(--accent);font-size:1.25rem;font-weight:800}.velocity-control input{width:100%;min-width:0;accent-color:var(--accent);grid-column:1/-1;display:block}.direction-control,.vessel-control{grid-template-columns:1fr 1fr;gap:.5rem;display:grid}.direction-control legend,.vessel-control legend{color:#c9dadd;padding:0 .3rem}.direction-control button,.vessel-control button{color:var(--muted);cursor:pointer;background:#17191b;border:1px solid #46494d;border-radius:9px;padding:.72rem .5rem}.direction-control button[aria-pressed=true],.vessel-control button[aria-pressed=true]{color:#07181d;background:var(--accent);border-color:var(--accent);font-weight:800}.technical-control{background:linear-gradient(135deg,#202225,#151719);border:1px solid #4a4d51;border-radius:16px;margin-bottom:1.25rem;padding:1.15rem 1.35rem}.baseline-control{background:#17191b;border:1px solid #4a4d51;border-radius:16px;grid-template-columns:minmax(230px,1fr) auto minmax(320px,2fr);align-items:center;gap:1.25rem;margin-bottom:1.25rem;padding:1rem 1.35rem;display:grid}.baseline-control h2{margin:0;font-size:1rem}.baseline-control p:last-child{color:var(--muted);margin:.3rem 0 0;font-size:.78rem}.baseline-control output{color:#ffd166;font-weight:800}.baseline-control input{accent-color:#ffd166;width:100%;min-width:0}.wall-filter-control{background:#17191b;border:1px solid #4a4d51;border-radius:16px;grid-template-columns:minmax(230px,1fr) auto minmax(280px,1.7fr) auto;align-items:center;gap:1rem;margin-bottom:1.25rem;padding:1rem 1.35rem;display:grid}.wall-filter-control.filter-active{border-color:#b87428}.wall-filter-control h2{margin:0;font-size:1rem}.wall-filter-control p:last-child{color:var(--muted);margin:.3rem 0 0;font-size:.78rem}.wall-filter-control output{color:#ffd166;font-weight:800}.wall-filter-control input{accent-color:#ff9f43;width:100%;min-width:0}.wall-filter-control>strong{white-space:nowrap;font-size:.72rem}.wall-filter-control>small{color:var(--muted);text-align:right;grid-column:2/-1}.filter-warning{color:#ffbd75}.filter-ok{color:#ffd56a}.sample-volume-control{background:#17191b;border:1px solid #4a4d51;border-radius:16px;grid-template-columns:minmax(230px,.8fr) auto 70px minmax(240px,1fr);align-items:center;gap:.7rem 1rem;margin-bottom:1.25rem;padding:1rem 1.35rem;display:grid}.sample-volume-control>div{grid-row:1/3}.sample-volume-control h2{margin:0;font-size:1rem}.sample-volume-control p:last-child{color:var(--muted);margin:.3rem 0 0;font-size:.78rem}.sample-volume-control output{color:#ffd166;font-weight:800}.sample-volume-control input{accent-color:#ffd166;width:100%;min-width:0}.correction-control{background:#17191b;border:1px solid #4a4d51;border-radius:16px;grid-template-columns:minmax(230px,.8fr) auto 70px minmax(260px,1fr);align-items:center;gap:.8rem 1rem;margin-bottom:1.25rem;padding:1rem 1.35rem;display:grid}.correction-control h2{margin:0;font-size:1rem}.correction-control p:last-child{color:var(--muted);margin:.3rem 0 0;font-size:.78rem}.correction-control output{color:#ffd166;font-weight:800}.correction-control input{accent-color:#ffd166;width:100%;min-width:0}.correction-metrics{color:var(--muted);grid-column:2/-1;justify-content:flex-end;gap:1.2rem;font-size:.75rem;display:flex}.correction-metrics strong{color:#f5f1e7;margin-left:.3rem}.frequency-controls{background:#17191b;border:1px solid #4a4d51;border-radius:16px;grid-template-columns:minmax(230px,.8fr) repeat(2,minmax(260px,1fr));gap:1rem;margin-bottom:1.25rem;padding:1rem 1.35rem;display:grid}.frequency-controls h2{margin:0;font-size:1rem}.frequency-controls p:last-child{color:var(--muted);margin:.3rem 0 0;font-size:.78rem}.frequency-slider{background:#141618;border-radius:10px;grid-template-columns:1fr auto;align-items:center;gap:.6rem;padding:.7rem .8rem;display:grid}.frequency-slider input{width:100%;accent-color:var(--sonolabs-yellow);grid-column:1/-1}.frequency-slider output{color:var(--accent);font-weight:800}.artifact-panel{background:linear-gradient(135deg,#252014,#14222a);border:1px solid #765426;border-radius:16px;margin-bottom:1.25rem;padding:1.1rem 1.35rem}.artifact-heading{justify-content:space-between;align-items:start;gap:1rem;display:flex}.artifact-heading h2{margin:0;font-size:1.08rem}.artifact-heading>span{color:#ffd39a;background:#4b2d13;border-radius:999px;padding:.35rem .6rem;font-size:.7rem;font-weight:800}.artifact-actions{gap:.7rem;margin-top:1rem;display:flex}.artifact-actions button{color:#f0efeb;cursor:pointer;background:#17191b;border:1px solid #765426;border-radius:8px;padding:.65rem .85rem}.artifact-actions button:disabled{opacity:.4;cursor:not-allowed}.artifact-panel>p{color:#e5d7bd;margin:.8rem 0 0;font-size:.84rem}.technical-control.aliasing-active{border-color:#b87428;box-shadow:inset 0 0 0 1px #ff9f4326}.technical-heading{justify-content:space-between;align-items:start;gap:1rem;display:flex}.technical-heading h2{margin:0;font-size:1.05rem}.alias-status{white-space:nowrap;border-radius:999px;padding:.35rem .6rem;font-size:.68rem;font-weight:800}.alias-status.ok{color:#ffe39a;background:#3a2d0d}.alias-status.warning{color:#ffd39a;background:#4b2d13}.prf-control-row{grid-template-columns:auto 90px minmax(260px,1fr);align-items:center;gap:1rem;margin-top:1rem;display:grid}.prf-control-row label{font-weight:800}.prf-control-row output{color:var(--accent);font-size:1.2rem;font-weight:800}.prf-control-row input{accent-color:#ff9f43;width:100%}.sampling-metrics{grid-template-columns:repeat(3,1fr);gap:.7rem;margin-top:.9rem;display:grid}.sampling-metrics>div{background:#141618;border-radius:8px;justify-content:space-between;gap:.5rem;padding:.7rem .8rem;display:flex}.sampling-metrics span{color:var(--muted);font-size:.72rem}.sampling-metrics strong{font-size:.82rem}.alias-explanation{color:#ffd9ab;background:#3b2815;border:1px solid #62441f;border-radius:8px;margin:.8rem 0 0;padding:.7rem .8rem;font-size:.8rem}.primary-grid{grid-template-columns:minmax(0,1.45fr) minmax(330px,.85fr);gap:1.25rem;display:grid}.panel{padding:1.35rem}.panel-heading{justify-content:space-between;align-items:start;gap:1rem;margin-bottom:1rem;display:flex}.panel h2{margin:0;font-size:1.15rem}.fidelity{border-radius:999px;padding:.35rem .55rem;font-size:.68rem;font-weight:750}.fidelity.calculated{color:#ffe39a;background:var(--accent-dark)}.badge-group{align-items:center;gap:.4rem;display:flex}.modality-badge{letter-spacing:.04em;border-radius:999px;padding:.35rem .55rem;font-size:.68rem;font-weight:800}.modality-badge.modality-cf{color:#07181d;background:var(--accent)}.modality-badge.modality-pw{color:#3a2a04;background:#ffd166}.physical-scene{touch-action:none;cursor:crosshair;background:#101214;border:1px solid #46494d;border-radius:12px;width:100%;min-height:330px;display:block}.beam-line{stroke:#ffd166;stroke-width:5px;stroke-linecap:round;filter:drop-shadow(0 0 6px #ffd1668c)}.beam-handle{fill:#ffd166;stroke:#fff1bd;stroke-width:3px}.reference-line{stroke:#607c87;stroke-width:1.5px;stroke-dasharray:6 6}.angle-arc{fill:none;stroke:#f8a94c;stroke-width:3px}.angle-label{fill:#ffd790;font-size:17px;font-weight:750}.svg-label{fill:#b9ced5;font-size:13px}.flow-label{fill:#78eddb}.svg-hint{fill:#6f8c97;font-size:12px}.flow-particles{animation-name:flow-right;animation-timing-function:linear;animation-iteration-count:infinite}.flow-particles.toward{animation-direction:reverse}.flow-particles circle{fill:#f4cbcb;opacity:.82}@keyframes flow-right{0%{transform:translate(-120px)}to{transform:translate(520px)}}.equation-panel{flex-direction:column;display:flex}.formula{justify-content:center;align-items:center;gap:.55rem;min-height:92px;font-family:Georgia,serif;font-size:clamp(1.4rem,3vw,2rem);display:flex}.fraction{text-align:center;flex-direction:column;display:inline-flex}.fraction>span:first-child{border-bottom:1.5px solid #bcd0d6;padding:0 .35rem .32rem}.fraction>span:last-child{padding-top:.2rem}mark{border-radius:4px;padding:.05em .16em;transition:background .18s}mark.active-term{color:#07171d;background:#ffd166}mark.inactive-term{color:inherit;background:0 0}.cosine-readout,.result-card{border-radius:12px;justify-content:space-between;align-items:center;padding:1rem;display:flex}.cosine-readout{background:#141618;border:1px solid #45484c;margin-top:.8rem}.cosine-readout span,.result-card span{color:var(--muted)}.cosine-readout strong{color:#ffd166;font-size:1.55rem}.direction-readout{color:var(--muted);justify-content:space-between;padding:0 .25rem;font-size:.78rem;display:flex}.direction-readout strong.toward{color:var(--accent)}.direction-readout strong.away{color:#78b8ff}.substitution{color:#b9ced5;flex-direction:column;align-items:center;margin:1rem 0;font-size:.78rem;display:flex}.substitution span:first-child{border-bottom:1px solid #607c87;padding:0 .25rem .2rem}.result-card{background:linear-gradient(135deg,#242528,#17191b);border:1px solid #53565a;margin-top:auto}.result-card strong{color:var(--accent);font-size:1.65rem}.explanation-panel,.hemodynamic-panel{margin-top:1.25rem}.derived-grid{grid-template-columns:1fr 1fr;gap:1.25rem;margin-top:1.25rem;display:grid}.derived-grid .hemodynamic-panel{margin-top:0}.spectral-panel{grid-column:1/-1}.spectral-layout{grid-template-columns:76px minmax(0,1fr);gap:.7rem;display:grid}.spectral-scale{color:var(--muted);flex-direction:column;justify-content:space-between;align-items:end;padding:.2rem 0 .3rem;font-size:.7rem;display:flex;position:relative}.spectral-scale strong{color:#d6e3e7;position:absolute;right:0;transform:translateY(-50%)}.velocity-ticks{pointer-events:none;width:34px;position:absolute;inset:0 0 0 auto}.velocity-ticks i{background:#8b969a;width:8px;height:1px;position:absolute;right:-.45rem;transform:translateY(-50%)}.velocity-ticks i.major{background:#d8d4c7;width:13px}.velocity-ticks em{color:#949da0;font-size:.58rem;font-style:normal;line-height:1;position:absolute;top:50%;right:16px;transform:translateY(-50%)}.spectral-canvas{aspect-ratio:1000/330;background:#050607;border:1px solid #484b4f;border-radius:12px;width:100%;min-height:220px;display:block}.frozen-measurements{color:#bbc6c9;background:linear-gradient(90deg,#ffc13529,#07698d1f);border:1px solid #ffc1356b;border-radius:8px;grid-template-columns:auto auto 1fr;align-items:center;gap:.55rem;margin:.65rem 0 0 76px;padding:.55rem .7rem;display:grid}.frozen-measurements div{border-right:1px solid #ffffff24;align-items:baseline;gap:.4rem;padding-right:.7rem;display:flex}.frozen-measurements span{color:var(--sonolabs-yellow);letter-spacing:.08em;font-size:.72rem;font-weight:900}.frozen-measurements strong{color:#fff7dc;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem}.frozen-measurements small{color:#aebabe;font-size:.68rem}.spectral-readout{grid-template-columns:repeat(4,1fr);gap:.7rem;margin-top:.75rem;display:grid}.spectral-readout>div{background:#151719;border-radius:9px;justify-content:space-between;align-items:center;gap:.6rem;padding:.75rem;display:flex}.spectral-readout span{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:.72rem}.spectral-readout strong{color:#f5f1e7;text-align:right;font-size:.86rem}.spectral-teaching-note{color:#e8e1d1;border:1px solid #5b522f;border-left:3px solid var(--sonolabs-yellow);background:#1b1913;border-radius:8px;margin:.8rem 0 0;padding:.7rem .8rem;font-size:.8rem}.color-panel{min-width:0}.fidelity.mixed{color:#d2bcff;background:#2b2144}.color-canvas{aspect-ratio:800/260;background:#25272a;border:1px solid #484b4f;border-radius:12px;width:100%;display:block}.color-scale{color:var(--muted);grid-template-columns:1fr auto 1fr;align-items:center;gap:.75rem;margin:.7rem 0;font-size:.76rem;display:grid}.color-scale span:last-child{text-align:right}.color-scale i{vertical-align:-.05rem;border-radius:3px;width:1rem;height:.7rem;display:inline-block}.red-swatch{background:#ef3b4f}.blue-swatch{background:#3687ff}.color-readout{grid-template-columns:1fr 1fr;gap:.7rem;display:grid}.color-readout>div{background:#151719;border-radius:9px;flex-direction:column;gap:.25rem;padding:.75rem;display:flex}.color-readout span{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.7rem}.color-readout strong{font-size:.88rem}.color-teaching-note{color:#f3e2bd;background:#332817;border:1px solid #5b4725;border-radius:8px;margin:.8rem 0 0;padding:.7rem .8rem;font-size:.8rem}.pending-processing{color:#9b9585;margin:.55rem 0 0;font-size:.72rem}.fidelity.approximation{color:#ffd89a;background:#3a2a17}.waveform-toolbar{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.6rem;display:flex}.waveform-toolbar p{color:var(--muted);margin:0;font-size:.82rem}.waveform-toolbar button{color:#ecebe7;border:1px solid var(--border);cursor:pointer;background:#17191b;border-radius:8px;padding:.5rem .8rem}.hemodynamic-waveform{background:#101214;border:1px solid #46494d;border-radius:12px;width:100%;height:190px;display:block}.wave-axis{stroke:#536e78;stroke-width:1.5px}.wave-line{fill:none;stroke:var(--accent);stroke-width:4px;stroke-linejoin:round}.wave-cursor{stroke:#ffd166;stroke-width:2px;stroke-dasharray:4 4}.wave-point{fill:#ffd166;stroke:#fff0b5;stroke-width:2px}.instantaneous-readout{color:var(--muted);background:#151719;border-radius:10px;justify-content:space-between;align-items:center;margin-top:.75rem;padding:.8rem 1rem;display:flex}.instantaneous-readout strong{color:var(--accent);font-size:1.25rem}.explanation-steps{grid-template-columns:repeat(3,1fr);gap:1rem;margin:0;display:grid}.explanation-steps>div{border-left:2px solid #5b522f;padding-left:1rem}.explanation-steps dt{color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin-bottom:.45rem;font-size:.72rem;font-weight:800}.explanation-steps dd{color:#c8d9de;margin:0;line-height:1.55}.model-warning{color:#f5ddb9;background:#352819;border:1px solid #624922;border-radius:10px;margin:1rem 0 0;padding:.85rem 1rem;font-size:.88rem}.science-note{color:#6f8c97;padding:1rem .2rem 0;font-size:.78rem}@media (width<=900px){.duplex-grid{grid-template-columns:1fr}.duplex-grid .spectral-canvas{min-height:220px}.drawer-grid{grid-template-columns:1fr}.workbench-heading{flex-direction:column;align-items:start;gap:.4rem}.workbench-heading>p{text-align:left}.ultrasound-console{grid-template-columns:repeat(3,110px)}.pw-control-tiles,.color-control-tiles{grid-template-columns:1fr 1fr 1fr}.primary-grid,.flow-controls,.derived-grid{grid-template-columns:1fr}.control-strip{grid-template-columns:1fr auto}.control-strip input,.range-labels{grid-column:1/-1}.baseline-control{grid-template-columns:1fr auto}.baseline-control input{grid-column:1/-1}.wall-filter-control{grid-template-columns:1fr auto}.wall-filter-control input,.wall-filter-control>small{grid-column:1/-1}.sample-volume-control{grid-template-columns:1fr auto}.sample-volume-control>div{grid-area:auto/1/auto/-1}.sample-volume-control input{grid-column:1/-1}.correction-control{grid-template-columns:1fr auto}.correction-control>div:first-child,.correction-control input,.correction-metrics{grid-column:1/-1}.correction-metrics{flex-wrap:wrap;justify-content:space-between}.frequency-controls,.sampling-metrics{grid-template-columns:1fr}.spectral-readout{grid-template-columns:1fr 1fr}}@media (width<=650px){.app-header,.simulator-shell{width:min(100% - 1rem,1380px)}.app-header{flex-direction:column;align-items:stretch;padding-top:.6rem}.sonolabs-brand img{width:38px;height:38px}.clinical-actions{grid-template-columns:1fr auto auto auto;display:grid}.interface-mode{min-width:0}.interface-mode button{flex:1;padding-inline:.35rem}.reset-button{padding-inline:.55rem}.guide-steps{grid-template-columns:1fr}.simulator-guide>header{grid-template-columns:44px 1fr auto;padding:.75rem}.simulator-guide>header img{width:44px;height:44px}.simulator-guide>header h2{font-size:1rem}.app-header>div>p:last-child{display:none}.display-header strong{max-width:45vw}.duplex-grid .panel-heading{align-items:center}.duplex-grid .spectral-canvas{min-height:180px}.duplex-grid .color-canvas{height:auto;min-height:0}.duplex-grid .color-readout,.duplex-grid .spectral-readout,.duplex-grid .color-teaching-note,.duplex-grid .spectral-teaching-note,.duplex-grid .pending-processing{display:none}.duplex-grid .color-scale{margin-bottom:0}.parameter-bar{margin-inline:-.1rem}.physics-workbench{padding:.65rem}.physics-workbench .physical-scene{min-height:245px}.physics-workbench .control-strip{grid-template-columns:1fr auto}.physics-workbench .control-strip input,.physics-workbench .range-labels{grid-column:1/-1}.ultrasound-console{grid-template-columns:repeat(3,92px);gap:.35rem}.ultrasound-console .rotary-knob{border-width:6px;width:68px;height:68px}.ultrasound-console .rotary-indicator{transform-origin:2px 28px;height:26px;top:4px;left:28px}.ultrasound-console .rotary-label{font-size:1.12rem}.ultrasound-console .rotary-arc{font-size:1.35rem;bottom:8px}.pw-control-deck{padding:.7rem}.pw-control-tiles{grid-template-columns:1fr 1fr;gap:.45rem}.color-control-tiles{grid-template-columns:1fr}.pw-control-tiles button{grid-template-columns:58px minmax(0,1fr);padding:.4rem}.pw-control-icon{width:58px;height:50px}.pw-selected-control{grid-template-columns:1fr auto}.pw-selected-control input,.pw-selected-control small{grid-column:1/-1}.audio-toggle{grid-area:auto/1/auto/-1}.audio-toggle+label{grid-column:1}.audio-toggle+label+output{grid-column:2}#quick-audio-volume,#quick-audio-volume+small{grid-column:1/-1}.control-strip{gap:1rem;padding:1rem}.prf-control-row{grid-template-columns:1fr auto}.prf-control-row input{grid-column:1/-1}.panel{padding:1rem}.explanation-steps{grid-template-columns:1fr}.physical-scene{min-height:250px}.spectral-layout{grid-template-columns:58px minmax(0,1fr)}.frozen-measurements{grid-template-columns:1fr 1fr;margin-left:58px}.frozen-measurements small{grid-column:1/-1}.spectral-readout{grid-template-columns:1fr}.spectral-canvas{min-height:180px}}@media (prefers-reduced-motion:reduce){.flow-particles{animation:none}}