.site-navigation{--site-nav-ink: #eeede7;--site-nav-muted: #bfc2b6;--site-nav-panel: #262a26;--site-nav-edge: #686b61;--site-nav-gold: #bba16a;position:fixed;z-index:100;top:28px;right:0;left:0;display:flex;justify-content:center;pointer-events:none;color:var(--site-nav-ink)}.site-navigation *,.site-navigation *:before,.site-navigation *:after{box-sizing:border-box}.site-navigation__pill{position:relative;display:flex;width:calc(100% - 88px);max-width:1536px;min-height:68px;align-items:center;justify-content:space-between;gap:24px;padding:10px 26px 10px 34px;border:1px solid var(--site-nav-edge);border-radius:10px;background:#242725;box-shadow:inset 0 1px #ffffff14,0 3px 8px #1013111a;pointer-events:auto}.site-navigation a{color:inherit;text-decoration:none}.site-navigation button{font:inherit;cursor:pointer}.site-navigation :is(a,button):focus-visible{outline:2px solid #d4bd82;outline-offset:4px}.site-navigation__brand{display:flex;min-width:0;align-items:center;gap:20px}.site-navigation__wordmark{display:inline-flex;min-height:44px;align-items:center;padding:0 24px 0 0;border-right:2px solid var(--site-nav-gold);color:#f1f0e9;font-size:15px;font-weight:500;letter-spacing:.27em;white-space:nowrap}.site-navigation__wordmark:hover{color:#dec994}.site-navigation__divider{display:none}.site-navigation__tool{display:inline-flex;min-width:0;flex-shrink:1;align-items:center;gap:9px;color:var(--site-nav-ink);font-size:14px;font-weight:500;white-space:nowrap}.site-navigation__tool:hover{color:#dec994}.site-navigation__logo{width:24px;height:24px;border-radius:50%;filter:saturate(.65)}.site-navigation__links{display:flex;align-items:center;gap:8px;margin-left:auto;color:#dfdfd7;font-size:14px;font-weight:400}.site-navigation__links>a,.site-navigation__drop-toggle{display:inline-flex;min-height:44px;align-items:center;gap:6px;padding:9px 10px;border:0;border-radius:5px;background:transparent;color:#dfdfd7;font:inherit;font-weight:400;white-space:nowrap}.site-navigation__links>a:hover,.site-navigation__drop-toggle:hover,.site-navigation__links>a[aria-current=page]{background:#353837;color:#f5dfaa}.site-navigation__links>a[aria-current=page]{box-shadow:inset 0 -2px var(--site-nav-gold)}.site-navigation__dropdown{position:relative}.site-navigation__drop-toggle svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2;transition:transform .16s ease}.site-navigation__dropdown[data-open=true] .site-navigation__drop-toggle svg{transform:rotate(180deg)}.site-navigation__drop-panel{position:absolute;top:calc(100% + 20px);right:-36px;display:flex;width:296px;flex-direction:column;gap:0;padding:8px;border:1px solid var(--site-nav-edge);border-radius:8px;background:var(--site-nav-panel);box-shadow:0 16px 28px #0f120e3d;opacity:0;transform:translateY(-5px);visibility:hidden;transition:opacity .16s ease,transform .18s ease,visibility 0s linear .18s}.site-navigation__dropdown[data-open=true] .site-navigation__drop-panel{opacity:1;transform:none;visibility:visible;transition-delay:0s}.site-navigation__drop-panel a{display:flex;flex-direction:column;gap:4px;padding:16px;border-bottom:1px solid #41463c;border-radius:4px;color:#efeee6}.site-navigation__drop-panel a:last-child{border-bottom:0}.site-navigation__drop-panel a:hover{background:#383c3a}.site-navigation__drop-panel strong{color:#efeee6;font-size:14px;font-weight:500}.site-navigation__drop-panel span{color:var(--site-nav-muted);font-size:12px;margin-top:0}.site-navigation__menu-toggle{display:none;min-height:44px;align-items:center;gap:9px;padding:10px 16px;border:1px solid #6b6e62;border-radius:5px;background:#333735;color:var(--site-nav-ink);font-size:14px;font-weight:500}.site-navigation__menu-toggle i{position:relative;width:16px;height:12px}.site-navigation__menu-toggle i:before,.site-navigation__menu-toggle i:after{position:absolute;left:0;width:16px;height:2px;border-radius:1px;background:currentColor;content:"";transition:top .18s ease,transform .18s ease}.site-navigation__menu-toggle i:before{top:1px}.site-navigation__menu-toggle i:after{top:9px}.site-navigation__menu-toggle[aria-expanded=true] i:before{top:5px;transform:rotate(45deg)}.site-navigation__menu-toggle[aria-expanded=true] i:after{top:5px;transform:rotate(-45deg)}@media(max-width:1180px)and (min-width:981px){.site-navigation__pill{width:calc(100% - 48px);padding-right:14px;padding-left:22px;gap:16px}.site-navigation__links{gap:1px;font-size:13px}.site-navigation__wordmark{padding-right:18px;font-size:13px;letter-spacing:.19em}.site-navigation__brand{gap:14px}}@media(max-width:980px){.site-navigation{top:16px}.site-navigation__pill{width:calc(100% - 32px);min-height:64px;gap:10px;padding:8px 12px 8px 22px}.site-navigation__brand{flex:1;gap:12px}.site-navigation__wordmark{padding-right:15px;font-size:13px;letter-spacing:.2em}.site-navigation__menu-toggle{display:inline-flex;flex-shrink:0}.site-navigation__links{position:absolute;top:calc(100% + 10px);right:0;left:0;display:flex;max-height:calc(100dvh - 110px);flex-direction:column;align-items:stretch;overflow-y:auto;margin-left:0;padding:12px;border:1px solid #6d795f;border-radius:8px;background:#272928;box-shadow:0 14px 35px #0d130940;opacity:0;transform:translateY(-8px);visibility:hidden;transition:opacity .18s ease,transform .2s ease,visibility 0s linear .2s}.site-navigation__links[data-open=true]{opacity:1;transform:none;visibility:visible;transition-delay:0s}.site-navigation__links>a,.site-navigation__drop-toggle{width:100%;min-height:49px;justify-content:space-between;padding:12px 16px;border-radius:4px;color:#dfdfd7;font-size:16px}.site-navigation__dropdown{width:100%}.site-navigation__drop-panel{position:static;display:none;width:auto;margin:0 0 8px 16px;padding:0 0 0 8px;border:0;border-left:1px solid #a38e60;border-radius:0;background:none;box-shadow:none;opacity:1;transform:none;visibility:visible;transition:none}.site-navigation__dropdown[data-open=true] .site-navigation__drop-panel{display:flex}.site-navigation__drop-panel a{padding:14px 12px}}@media(max-width:640px){.site-navigation{top:16px}.site-navigation__wordmark{border-right:1px solid #a98f59;font-size:10px;letter-spacing:.12em;padding-right:10px}.site-navigation__brand{gap:8px}.site-navigation__tool{gap:0;font-size:11px;line-height:1.3;white-space:normal}.site-navigation__logo{display:none}.site-navigation__menu-toggle{font-size:12px;padding:10px 11px}}@media(prefers-reduced-motion:reduce){.site-navigation *,.site-navigation *:before,.site-navigation *:after{transition-duration:.01ms!important}}.desktop-gate{max-width:650px;margin:0 auto;padding:140px 26px 50px;text-align:center;color:#183d37}.desktop-gate>img{border-radius:23px;margin-bottom:20px;box-shadow:0 14px 30px #153f3d20}.desktop-gate__eyebrow{font-size:11px;font-weight:700;letter-spacing:2px}.desktop-gate h1{font-size:clamp(32px,7vw,48px);line-height:1.08;letter-spacing:-1.8px;margin:18px 0 24px}.desktop-gate>p:not(.desktop-gate__eyebrow){font-size:17px;line-height:1.65;color:#53695f}.desktop-gate>p.desktop-gate__detail{font-size:13px;margin:18px 0 26px}.desktop-gate>button{border:0;border-radius:14px;background:#174842;color:#fff;padding:16px 22px;font:inherit;font-weight:650;cursor:pointer}.desktop-gate label{display:block;margin:24px auto 0;max-width:330px;font-size:12px;color:#61756b}.desktop-gate__link{display:block;width:100%;padding:12px;margin-top:8px;border:1px solid #c7d1c7;background:#fff9;color:#244c42;border-radius:8px;font:inherit;font-size:14px;text-align:center}.desktop-gate__status{display:block;min-height:24px;font-size:12px;padding-top:8px}.desktop-gate__back{display:inline-block;margin-top:20px;color:#285a4e;font-size:14px}.desktop-loading{padding:120px 24px;text-align:center}:root{font-family:-apple-system,BlinkMacSystemFont,Helvetica Neue,sans-serif;color:#28332f;background:#eef0ed;font-synthesis:none;font-optical-sizing:auto;font-weight:400;-webkit-font-smoothing:antialiased;font-size:14px;--muted: #738077;--line: #dce1dc;--green: #386953;--warm: #c19363}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default}button{border:0;background:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #559883;outline-offset:4px}a{color:inherit}button{transition:background .18s,box-shadow .18s,transform .18s}button:hover{background-color:#dfe5de}button:active{transform:translateY(1px)}button svg{flex:none}button,a{touch-action:manipulation}.app-shell{max-width:1700px;margin:auto;padding:0 44px}.site-header{height:84px;display:flex;align-items:center;gap:24px;border-bottom:1px solid #dce1da}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-size:13px;font-weight:730;letter-spacing:1.15px}.brand-mark{font-family:Georgia,serif;font-size:29px;font-style:italic;letter-spacing:-4px;display:block;transform:translate(-3px)}.brand-mark span{color:#5c8973}.brand-cfi{font-weight:400;color:#7a847d}.app-wordmark{display:flex;align-items:center;gap:20px;font-size:14px;font-weight:550}.header-divider{width:1px;height:20px;background:#cdd4cd}.version{font-size:8px;letter-spacing:1.4px;color:#78837b;display:inline-block;border:1px solid #d6ddd4;border-radius:4px;padding:5px 6px}.site-header nav{display:flex;gap:16px;margin-left:auto;align-items:center}.text-button,.source-button{display:flex;align-items:center;gap:7px;font-size:11px;min-height:36px}.source-button{background:#f8f9f6;border:1px solid #dfe4dc;border-radius:30px;padding:9px 14px;box-shadow:inset 0 1px 1px #fff,0 2px 4px #3a483504}.intro{display:flex;align-items:center;justify-content:space-between;padding:35px 0 28px}.eyebrow{font-size:9px;font-weight:650;letter-spacing:1.8px;color:#7a857d;line-height:1.5}h1{font-size:34px;letter-spacing:-1.25px;font-weight:560;line-height:1.25;margin:7px 0 0}h1 span{color:#8b958d}h2,h3,p{margin:0}.intro p{font-size:12px;line-height:1.65;color:#738176;padding-right:9px}.workspace-bar{display:flex;gap:12px;align-items:center;margin-bottom:18px}.lesson-tabs{display:flex;padding:5px;background:#e3e7e0;border:1px solid #dce1d8;border-radius:11px;gap:3px}.lesson-tabs button{font-size:11px;color:#6f7d72;padding:10px 18px;min-height:37px;white-space:nowrap;border-radius:7px}.lesson-tabs button.active{background:linear-gradient(145deg,#fffefa,#f2f5ee);color:#314d3e;box-shadow:0 2px 5px #263e2314,inset 0 0 1px 1px #ffffffa8;font-weight:550}.reset-button{margin-left:auto;display:flex;align-items:center;gap:7px;font-size:10px;color:#7a847c;padding:10px}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;align-items:start}.visual-column,.control-column{min-width:0;display:flex;flex-direction:column;gap:18px}.tunnel-card{border-radius:15px;background:radial-gradient(ellipse at 30% 45%,#16323d,#10252f 45%,#0c1b23);overflow:hidden;box-shadow:0 8px 20px #2c413418,0 1px 2px #112b2c35;color:#eef4e9}.tunnel-topline{padding:24px 27px 0;display:flex;justify-content:space-between;align-items:center;position:relative;z-index:2;gap:12px}.tunnel-kicker{font-size:8px;letter-spacing:1.6px;color:#94abae;font-weight:550}.tunnel-topline h2{font-size:14px;font-weight:500;margin-top:7px;letter-spacing:.1px}.tunnel-topline h2 span{color:#91a6a8;font-size:11px;margin-left:4px}.flow-status{font-size:9px;color:#a7c7b7;display:flex;gap:7px;align-items:center;padding:7px 10px;border-radius:20px;background:#b0d8c307;border:1px solid #90bfb51f;white-space:nowrap}.flow-status>span{width:5px;height:5px;background:#91c5a5;border-radius:50%;box-shadow:0 0 8px #76c3934d}.flow-status.warning{color:#ecc08d;border-color:#d5b4862f}.flow-status.warning>span{background:#f0b378}.tunnel-stage{position:relative;height:350px}.tunnel-canvas{width:100%;height:100%;display:block}.section-label{position:absolute;left:27px;top:22px;font-size:7px;letter-spacing:1.3px;color:#839a9d;pointer-events:none}.section-label span{display:block;letter-spacing:0;margin-top:5px;font-size:8px;color:#82999c}.flow-kind{position:absolute;right:23px;bottom:24px;font-size:8px;color:#879d9f}.tunnel-actions{position:absolute;right:22px;top:19px;display:flex;gap:5px}.tunnel-actions button{border-radius:7px;padding:8px;display:grid;place-items:center;color:#b5c4c3;background:#7c9a9811;border:1px solid #a9c3bf1c}.tunnel-actions button:hover{background:#91a7a12a}.tunnel-toolbar{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #9cbbb818;padding:11px 22px;gap:8px}.overlay-group{display:flex;gap:4px}.overlay-toggle{display:flex;align-items:center;gap:5px;font-size:9px;color:#90a4a5;border-radius:6px;padding:7px 9px;min-height:30px}.overlay-toggle.selected{color:#d5e4dc;background:linear-gradient(165deg,#deeada20,#a2b5ad09);box-shadow:inset 0 1px #ffffff13,0 1px 3px #0000001a;border:1px solid #c7e1d019}.overlay-toggle:hover{background:#dae2d51b}.wake-button{display:flex;align-items:center;gap:4px;color:#8faeab;font-size:9px;padding:5px;border-radius:5px}.wake-button:hover,.wake-button.active{background:#b9c9be12;color:#d5e7df}.force-strip{display:grid;grid-template-columns:1.12fr 1fr 1fr 1.08fr;background:#03111747;border-top:1px solid #acc0b619;padding:19px 25px 21px;gap:20px}.force-strip>div>span{display:flex;align-items:center;gap:5px;font-size:7px;color:#99afad;letter-spacing:1.15px;white-space:nowrap}.force-strip strong{display:block;font-size:26px;font-weight:450;letter-spacing:-.8px;margin-top:7px;font-variant-numeric:tabular-nums}.force-strip strong small{font-size:10px;color:#91a5a4;font-weight:400;letter-spacing:0;margin-left:5px}.force-strip button{color:#89a19b;padding:0;display:inline-flex}.dot{display:inline-block;width:5px;height:5px;border-radius:50%;flex:none;vertical-align:middle}.dot.lift{background:#69a98e}.dot.drag{background:#c59a73}.dot.induced{background:#7ca3b7}.dot.total{background:#434d47}.warning-text{color:#f0b07b}.learning-card{background:#f8f9f5;border:1px solid #e0e5dc;border-radius:13px;display:flex;gap:17px;padding:23px 25px}.lesson-number{background:#e6eee3;color:#69846c;width:42px;height:42px;border:1px solid #e0e8da;border-radius:11px;display:grid;place-items:center;flex:none}.learning-card h3{font-size:19px;font-weight:550;letter-spacing:-.5px;margin:7px 0 9px}.learning-card p{font-size:12px;line-height:1.8;color:#7a867c;max-width:600px}.try-prompt{display:flex;gap:7px;align-items:start;margin-top:15px;border-top:1px solid #e5e9e0;padding-top:13px;color:#627c63;font-size:11px;line-height:1.6}.try-prompt svg{flex:none;margin-top:1px}.small-action{display:flex;align-items:center;gap:10px;border-radius:7px;background:#e1eade;color:#456b51;font-size:11px;padding:9px 11px;margin-top:12px}.analysis-card{border:1px solid #dce3d8;border-radius:13px;background:#f7f9f5;padding:22px 25px 15px}.analysis-heading{display:flex;justify-content:space-between;align-items:center}.analysis-heading h3{font-size:16px;font-weight:550;letter-spacing:-.35px;margin-top:5px}.segmented{display:flex;padding:3px;background:#e5e9e1;border:1px solid #dde3d8;border-radius:8px}.segmented button{padding:6px 15px;border-radius:5px;font-size:10px;color:#7b877b;min-height:29px}.segmented button.active{background:#fdfdf7;color:#3f604b;box-shadow:0 1px 3px #293e2320}.chart{width:100%;height:190px;margin-top:5px}.chart text{font:9px -apple-system,sans-serif;fill:#849083}.chart-footer{display:flex;justify-content:space-between;gap:10px;font-size:8px;color:#83917f}.chart-footer>span{display:flex;align-items:center;gap:5px}.chart-footer .dot:not(:first-child){margin-left:7px}.chart-note{color:#84917f;font-size:9px;line-height:1.6;border-top:1px solid #e3e8de;padding-top:12px;margin-top:13px}.cockpit-card,.controls-card,.drag-summary{background:linear-gradient(135deg,#f9faf7d9,#f3f6ef9c);border:1px solid #dce3d8;border-radius:13px;box-shadow:inset 0 1px 1px #ffffffd9,0 2px 8px #42593903}.cockpit-card{padding:19px 15px 13px}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.card-heading h2{font-size:11px;font-weight:550;display:flex;gap:8px;align-items:center;letter-spacing:.05px}.card-heading h2 svg{color:#84907d}.card-heading>span{font-size:7px;letter-spacing:1.1px;color:#939e8b}.instrument-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.instrument{min-width:0}.instrument svg{width:100%;display:block;filter:drop-shadow(0 5px 5px #253b2925)}.dial-label{font-size:8px;letter-spacing:1.3px;fill:#bcc9c3;font-weight:400}.dial-unit{font-size:7px;letter-spacing:1.6px;fill:#81928a}.instrument-caption{display:flex;justify-content:center;gap:5px;font-size:9px;font-weight:500;margin-top:11px;white-space:nowrap}.instrument-caption span{color:#8a9389;font-size:8px}.instrument-note{border-top:1px solid #e1e6dc;margin-top:15px;padding-top:10px;display:flex;justify-content:center;gap:5px;color:#939d8c;font-size:8px}.instrument-note button{padding:0;display:flex;color:#8d9a86}.controls-card{padding:21px 22px 0}.range-control{display:block;margin-top:25px}.range-label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:11px;color:#647260}.range-label output{font-size:17px;font-weight:500;color:#364c37;font-variant-numeric:tabular-nums;letter-spacing:-.3px}.range-label small{font-size:10px;font-weight:400;color:#8b9783;margin-left:3px;letter-spacing:0}input[type=range]{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:100%;height:5px;border-radius:5px;background:linear-gradient(to right,#6c8970 0%,#6c8970 var(--fill),#dce3d4 var(--fill),#dce3d4 100%);display:block;margin:19px 0 13px;cursor:pointer;box-shadow:inset 0 1px 2px #283e2614}input[type=range]::-webkit-slider-thumb{-moz-appearance:none;appearance:none;-webkit-appearance:none;background:linear-gradient(150deg,#fffef8,#e5ecdf);width:18px;height:18px;border-radius:50%;border:1px solid #c3cfbb;box-shadow:0 2px 3px #354c2923,inset 0 0 0 3px #ffffff60}input[type=range]::-moz-range-thumb{background:#f8f9f2;width:17px;height:17px;border-radius:50%;border:1px solid #c3cfbb}.range-scale{display:flex;justify-content:space-between;font-size:8px;color:#919d87;gap:7px}.range-control.disabled{opacity:.65}input:disabled{cursor:default}.flap-control{margin-top:25px}.flap-detents{display:flex;border:1px solid #d7dfd0;background:#e4eadf;border-radius:8px;padding:4px;gap:4px;margin-top:12px}.flap-detents button{flex:1;font-size:9px;padding:8px 4px 6px;color:#8b977e;border-radius:5px;position:relative;display:flex;align-items:center;flex-direction:column;gap:5px}.flap-detents button i{width:10px;height:2px;background:#c5d1bd;border-radius:2px}.flap-detents button.active{color:#355b3e;background:linear-gradient(145deg,#fffef9,#f0f5e9);box-shadow:0 2px 3px #293d211a,inset 0 1px #fff}.flap-detents button.active i{background:#67845c}.flap-context{display:flex;align-items:center;gap:3px;font-size:8px;color:#89977c;margin-top:8px;min-height:13px}.flap-context strong{font-weight:500;color:#ac6635}.flap-context>span{margin-left:auto}.constraint-control{border-top:1px solid #dfe5d9;padding-top:22px;margin-top:23px;display:flex;align-items:center;justify-content:space-between;gap:6px}.constraint-control>span{font-size:10px;color:#7d8b72}.constraint-control .segmented button{font-size:9px;padding:5px 10px}.turn-result{background:#e8eee2;border:1px solid #dce5d4;border-radius:9px;display:flex;gap:12px;align-items:center;margin-top:20px;padding:12px}.turn-result>div{min-width:91px;flex:none}.turn-result span{font-size:6px;letter-spacing:.7px;color:#889979}.turn-result strong{display:block;font-size:22px;font-weight:450;color:#577147;margin-top:5px;letter-spacing:-.7px}.turn-result strong small{font-size:9px;font-weight:400;color:#829374}.turn-result p{font-size:8px;line-height:1.75;color:#7b8c6b}.turn-result.unreachable{background:#f1e6d6;border-color:#e2d1b8}.turn-result.unreachable p{color:#946833}.advanced-button{width:calc(100% + 44px);margin:21px -22px 0;padding:15px 22px;border-top:1px solid #dfe5d6;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#839173;border-radius:0 0 12px 12px}.rotated{transform:rotate(180deg)}.advanced-controls{border-top:1px solid #e0e7d8;padding:16px 0 22px}.select-label{display:flex;flex-direction:column;gap:8px;font-size:10px;color:#738366;margin-bottom:15px}select{border:1px solid #d6e0cd;border-radius:6px;padding:9px 8px;font-size:11px;background:#fafbf4;color:#4c6440;width:100%}.checkbox-label{display:flex;gap:8px;align-items:center;color:#6d7e5d;font-size:10px;margin-top:24px}.checkbox-label input{accent-color:#678853}.drag-summary{padding:19px 22px}.drag-bar{display:flex;height:5px;border-radius:4px;overflow:hidden;margin:19px 0 13px;gap:3px}.drag-bar span:first-child{background:#c6a381}.drag-bar span:last-child{background:#85a6b4}.drag-numbers{display:grid;grid-template-columns:1fr 1fr}.drag-numbers>div:last-child{padding-left:21px;border-left:1px solid #dde4d5}.drag-numbers span{display:flex;align-items:center;gap:5px;font-size:9px;color:#7d8a70}.drag-numbers strong{display:block;font-size:19px;font-weight:450;color:#536442;margin-top:7px}.drag-numbers strong small{font-size:9px;font-weight:400;color:#94a081}.drag-summary>p{font-size:8px;line-height:1.75;color:#8e9b7f;border-top:1px solid #e1e6d8;padding-top:12px;margin-top:15px}.technical-details{margin-top:22px;border:1px solid #dbe2d3;border-radius:10px;color:#7f8d70;background:#e8ede2}.technical-details summary{cursor:pointer;list-style:none;display:flex;gap:15px;align-items:center;padding:18px 20px;font-size:11px;color:#5f7350}.technical-details summary::-webkit-details-marker{display:none}.technical-details summary>span{font-size:9px;color:#8d9b7d}.technical-details summary>svg{margin-left:auto}.technical-body{padding:5px 22px 20px}.equation{font-family:Georgia,serif;color:#4a6440;font-size:22px;padding:8px 0 20px}.equation span{display:block;font-family:-apple-system,sans-serif;font-size:10px;color:#819472;margin-top:8px}.technical-body dl{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:0}.technical-body dt{font-size:9px;color:#80916e}.technical-body dd{margin:6px 0 0;color:#506441;font-size:13px}.technical-body p{font-size:10px;line-height:1.8;max-width:1000px;margin-top:20px}.inline-link{padding:0;color:#466437;text-decoration:underline}.error-banner{background:#f3e1d7;border:1px solid #ddbcab;border-radius:8px;padding:15px;color:#91563f;font-size:12px;display:flex;gap:10px;align-items:center}.error-banner button{background:#e0c2b1;padding:8px;border-radius:5px}footer{display:flex;justify-content:space-between;gap:20px;padding:28px 0 32px;color:#96a186;font-size:8px;letter-spacing:.3px}footer>span{display:flex;align-items:center;gap:10px}footer button{display:flex;align-items:center;gap:5px;font-size:8px;color:#8c9b79;padding:0}.footer-dot{color:#bec9b3}dialog{border:1px solid #fff;border-radius:22px;max-width:680px;width:calc(100% - 30px);max-height:85vh;padding:0;background:#f5f7f0;color:#46593a;box-shadow:0 25px 100px #172b1c50}dialog::backdrop{background:#1b2e2580;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.dialog-content{padding:38px;position:relative}.dialog-close{position:absolute;right:20px;top:20px;border-radius:50%;background:#e4ebdc;color:#788b63;display:grid;place-items:center;width:32px;height:32px}.dialog-content h2{font-size:28px;letter-spacing:-1px;font-weight:500;margin-top:12px;margin-bottom:16px;max-width:480px}.dialog-content p,.help-steps{font-size:12px;line-height:1.9;color:#7b8d69;margin:14px 0}.dialog-content h3{font-size:15px;font-weight:550;margin-top:25px}.source-list{display:flex;flex-direction:column;gap:9px;margin:24px 0}.source-list a{display:flex;justify-content:space-between;align-items:center;gap:14px;border:1px solid #dce6d1;border-radius:10px;padding:16px;text-decoration:none;background:#edf2e5}.source-list a>span{display:flex;flex-direction:column;gap:6px}.source-list small{font-size:8px;letter-spacing:1px;color:#91a17d;text-transform:uppercase}.source-list strong{font-size:13px;font-weight:500}.source-list a>span>span{font-size:9px;color:#8b9c75}.help-steps{padding-left:23px}.help-steps li{padding-left:6px;margin:15px 0}.help-steps strong{color:#536f40}.tunnel-card:fullscreen{height:100vh;border-radius:0;display:flex;flex-direction:column}.tunnel-card:fullscreen .tunnel-stage{flex:1}.tunnel-card:fullscreen .tunnel-topline{padding-top:30px}.tunnel-card:fullscreen .force-strip{padding:25px 8%}@media(min-width:1500px){.lab-grid{grid-template-columns:minmax(0,1fr) 390px}.tunnel-stage{height:410px}.tunnel-topline{padding-top:26px}.force-strip{padding-top:22px;padding-bottom:24px}.lesson-tabs button{font-size:12px}.learning-card{padding:27px}.chart{height:220px}}@media(max-width:1200px){.app-shell{padding:0 25px}.lab-grid{grid-template-columns:minmax(0,1fr) 325px;gap:16px}.lesson-tabs button{padding:9px 12px;font-size:10px}.tunnel-stage{height:340px}.tunnel-topline{padding:22px 20px 0}.tunnel-topline h2 span{display:block;margin:5px 0 0}.tunnel-topline h2{font-size:13px}.flow-status{font-size:8px}.tunnel-toolbar{padding:10px 12px;flex-wrap:wrap}.wake-button{margin-left:auto}.force-strip{padding:18px 19px;gap:9px}.force-strip>div>span{font-size:6px;letter-spacing:.7px}.force-strip strong{font-size:23px}.learning-card{padding:20px}.chart-footer{flex-wrap:wrap}.instrument-pair{gap:8px}.instrument-caption{gap:3px;font-size:8px}.instrument-caption span{font-size:7px}.controls-card{padding:20px 19px 0}.advanced-button{width:calc(100% + 38px);margin-left:-19px;margin-right:-19px;padding-left:19px;padding-right:19px}.constraint-control .segmented button{padding:5px 8px}.intro p{font-size:11px}}@media(max-width:1000px){.lab-grid{grid-template-columns:minmax(0,1fr) 300px}.app-shell{padding:0 20px}h1{font-size:29px}.app-wordmark{gap:12px}.version{display:none}.site-header{gap:16px;height:74px}.site-header nav{gap:8px}.text-button{font-size:10px}.source-button{font-size:10px;padding:8px 10px}.intro{padding-top:26px;padding-bottom:25px}.intro p{font-size:10px}.lesson-tabs{gap:0;flex:1}.lesson-tabs button{padding:8px;flex:1;font-size:9px}.force-strip{grid-template-columns:1fr 1fr;row-gap:18px}.force-strip strong{font-size:25px}.force-strip>div>span{font-size:7px}.tunnel-stage{height:310px}.flow-status{max-width:115px;white-space:normal;line-height:1.5}.tunnel-actions{top:19px}.section-label{left:20px;font-size:6px}.section-label span{max-width:170px;font-size:7px}.flow-kind{font-size:7px;bottom:18px}.overlay-toggle{font-size:8px;padding:6px}.overlay-toggle svg{width:12px}.learning-card{gap:12px;padding:20px 17px}.learning-card h3{font-size:17px}.learning-card p{font-size:11px}.lesson-number{width:32px;height:32px;border-radius:9px}.lesson-number svg{width:16px}.try-prompt{font-size:10px}.chart{height:165px}.analysis-card{padding:18px 17px}.cockpit-card{padding:17px 11px 12px}.instrument-pair{gap:7px}.card-heading h2{font-size:10px}.card-heading>span{font-size:6px}.instrument-note{font-size:7px}.controls-card{padding:20px 17px 0}.advanced-button{width:calc(100% + 34px);margin-left:-17px;margin-right:-17px;padding-left:17px;padding-right:17px}.range-control{margin-top:22px}.turn-result{padding:10px;gap:9px}.turn-result>div{min-width:79px}.turn-result span{font-size:5.5px}.turn-result p{font-size:7.5px}.drag-summary{padding:18px}.technical-body dl{grid-template-columns:repeat(4,1fr)}}@media(max-width:760px){.app-shell{padding:0 16px}.site-header{height:68px}.brand{font-size:11px;gap:8px}.brand-mark{font-size:25px}.app-wordmark{font-size:12px;gap:12px}.site-header nav{gap:5px}.text-button span,.source-button span{display:none}.source-button,.text-button{width:34px;min-height:34px;padding:0;justify-content:center;border-radius:50%}.intro{padding:27px 0 23px}.intro p{display:none}h1{font-size:29px;letter-spacing:-1px}.eyebrow{font-size:8px;letter-spacing:1.5px}.workspace-bar{margin:0 -16px 16px;gap:0;overflow:auto;padding:0 16px}.lesson-tabs{flex:none;gap:3px;padding:4px;max-width:none}.lesson-tabs button{padding:9px 11px;font-size:10px;min-height:33px}.reset-button{padding:10px}.reset-button span{display:none}.lab-grid{display:flex;flex-direction:column;gap:18px}.visual-column,.control-column{display:contents}.tunnel-card{order:1;width:100%}.cockpit-card{order:2;width:100%;padding:18px 22px}.controls-card{order:3;width:100%;padding:22px 24px 0}.learning-card{order:4}.analysis-card{order:6;width:100%}.drag-summary{order:5;width:100%}.error-banner{order:0}.tunnel-stage{height:320px}.tunnel-topline{padding:20px 18px 0}.tunnel-topline h2{font-size:14px}.tunnel-topline h2 span{font-size:10px}.flow-status{font-size:8px;max-width:none}.section-label{left:18px;top:20px}.section-label span{max-width:none}.tunnel-actions{right:16px}.tunnel-toolbar{padding:10px 13px}.overlay-toggle{font-size:9px;padding:7px}.overlay-toggle svg{width:13px}.force-strip{grid-template-columns:repeat(4,1fr);padding:19px 17px;gap:10px}.force-strip>div>span{font-size:6px;letter-spacing:.5px}.force-strip strong{font-size:21px;letter-spacing:-.5px}.force-strip strong small{font-size:8px;margin-left:3px}.force-strip button{display:none}.instrument-pair{max-width:355px;gap:25px;margin:16px auto 0}.instrument-caption{font-size:10px;gap:8px}.instrument-caption span,.instrument-note{font-size:9px}.card-heading h2{font-size:12px}.card-heading>span{font-size:8px}.range-label{font-size:12px}.range-label output{font-size:19px}.range-scale{font-size:9px}input[type=range]{height:6px;margin-top:21px;margin-bottom:15px}input[type=range]::-webkit-slider-thumb{width:23px;height:23px}.flap-detents button{font-size:11px;padding:12px 5px 9px}.flap-context{font-size:10px}.constraint-control>span{font-size:12px}.constraint-control .segmented button{font-size:11px;padding:8px 17px}.turn-result{padding:14px;gap:20px}.turn-result>div{min-width:105px}.turn-result span{font-size:7px}.turn-result p{font-size:10px;line-height:1.7}.turn-result strong{font-size:26px}.advanced-button{width:calc(100% + 48px);margin-left:-24px;margin-right:-24px;padding:18px 24px;font-size:12px}.select-label{font-size:12px}select{font-size:13px;padding:12px}.checkbox-label{font-size:12px}.drag-summary{padding:22px 24px}.drag-summary p{font-size:10px}.drag-numbers span{font-size:11px}.drag-numbers strong{font-size:24px}.drag-bar{height:7px}.learning-card{padding:24px 20px}.learning-card h3{font-size:19px}.learning-card p{font-size:12px}.try-prompt{font-size:11px}.lesson-number{width:37px;height:37px}.analysis-card{padding:22px 20px}.chart{height:auto;min-height:150px}.chart-footer{font-size:9px}.chart-note{font-size:10px}.technical-details summary{font-size:12px;flex-wrap:wrap;gap:5px}.technical-details summary>span{font-size:9px;width:80%;order:3}.technical-details summary>svg{margin-left:auto}.technical-body dl{grid-template-columns:1fr 1fr}.technical-body p{font-size:11px}footer{flex-direction:column;gap:13px;font-size:8px;padding-bottom:25px}.dialog-content{padding:32px 23px}.dialog-content h2{font-size:26px;max-width:290px}.dialog-content p,.help-steps{font-size:12px}.source-list a{padding:13px}.source-list strong{font-size:12px}.dialog-close{right:12px;top:12px}.tunnel-card:fullscreen .tunnel-stage{min-height:200px}}@media(max-width:390px){.app-shell{padding:0 12px}.workspace-bar{margin-left:-12px;margin-right:-12px;padding-left:12px;padding-right:12px}.site-header{gap:11px}.app-wordmark{font-size:11px;gap:10px}.brand{font-size:10px}h1{font-size:26px}.force-strip{grid-template-columns:repeat(2,1fr);padding:19px 22px;gap:17px}.force-strip>div>span{font-size:9px}.force-strip strong{font-size:25px}.tunnel-stage{height:280px}.tunnel-topline{gap:6px}.flow-status{font-size:9px;padding:6px;max-width:110px}.overlay-group{width:100%;justify-content:space-between}.wake-button{margin:5px 0 0 auto}.tunnel-actions button{padding:6px}.section-label span{max-width:170px}.flow-kind{right:15px;font-size:6px}.instrument-pair{gap:15px}.instrument-caption{font-size:9px;gap:4px}.instrument-caption span{font-size:8px}.learning-card{gap:12px;padding:22px 16px}.lesson-number{display:none}.constraint-control .segmented button{padding:8px 12px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.eyebrow{color:#6d796e}.intro p{color:#677567}.range-scale{color:#748268}.instrument-note{color:#74806a}.learning-card p{color:#65735f}.chart-note{color:#6d7c62}.chart-footer{color:#69785e}.drag-summary>p{color:#6d7c5f}.turn-result p{color:#657953}.flap-context{color:#728262}.technical-details summary>span{color:#748462}.instrument-caption span{color:#6c7963}.card-heading>span{color:#77876a}.flow-warning{position:absolute;left:20px;right:20px;bottom:3px;text-align:center;font-size:9px;line-height:1.5;color:#e7b68c;padding:5px;background:#1c2629e8;border-radius:5px}.flow-kind{display:flex;align-items:center;gap:4px}.source-list a>span>span,.dialog-content p,.help-steps{color:#687c55}.bank-forces{width:100%;height:126px;display:block;margin-top:16px;border-top:1px solid #e0e6d9;padding-top:10px}.bank-forces text{font:6.5px -apple-system,sans-serif;letter-spacing:.4px;fill:#6b7f5c}.studio-launch{display:flex;gap:9px;align-items:center;justify-content:center;width:100%;border:1px solid #d4dec9;border-radius:7px;background:#e9f0e1;color:#597348;margin-top:20px;padding:12px;font-size:11px}.studio-loading{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;background:#edf0e9ea;display:grid;place-items:center;color:#53644a;font-size:16px}.field-controls{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 25px 11px;color:#91adac;font-size:8px}.field-controls>button{display:flex;align-items:center;gap:5px;color:#a8c2ba;font-size:9px;padding:4px 0}.field-controls button:hover{background:#9eb4ab14}.field-legend{display:flex;gap:6px;align-items:center}.field-legend>i{width:48px;height:4px;border-radius:4px;background:linear-gradient(90deg,#234172,#44979b,#dfa877)}.field-legend>i.vorticity{background:linear-gradient(90deg,#4f99bd,#192b30,#d49769)}.field-legend button{display:flex;padding:3px;color:#afc3bb}@media(max-width:760px){.field-controls{flex-wrap:wrap;padding:0 17px 14px;gap:9px}.field-legend{font-size:7px}}.tunnel-stage.native-stage{width:100%;min-width:0;height:auto;aspect-ratio:1.8;min-height:240px;background:#08101a}.native-flow-layer{position:absolute;top:0;right:0;bottom:0;left:0}.native-flow-layer iframe{display:block;width:100%;height:100%;border:0}.native-stage .tunnel-canvas{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.native-flow-loading{position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;background:#10212af0;padding:28px;text-align:center;color:#cfebe3;font-size:14px}.native-flow-loading span{max-width:420px;font-size:12px;line-height:1.6;color:#adc8c3}.native-flow-loading button{background:#def0e9;color:#1c4238;padding:12px 16px;border-radius:9px}.native-stage .section-label,.native-stage .flow-kind{background:#081521d9;color:#cfdfde;padding:7px 9px;border-radius:5px}.native-stage .section-label span{color:#b5cbcc}.native-stage .tunnel-actions button{background:#081521d9}.native-stage+.tunnel-controls .field-legend i.speed,.field-legend i.speed{background:linear-gradient(90deg,#051040,#1070c0,#20c0a0,#d0e030,#ff3020)}@media(max-width:760px){.tunnel-stage.native-stage{min-height:220px}.native-stage .section-label{left:12px;top:10px;max-width:62%}.native-stage .flow-kind{bottom:8px;right:10px;font-size:8px}}@media(max-width:760px){.native-stage .tunnel-actions{right:10px;top:10px}}.teaching-tabs{display:flex;gap:6px;padding:15px 22px 5px;background:#10212a}.teaching-tabs button{padding:11px 20px;border-radius:9px;color:#b7ccc7;background:transparent;font-size:13px}.teaching-tabs button[aria-pressed=true]{background:#dcebe3;color:#183b32;box-shadow:0 2px 6px #0002}.teaching-tools{display:flex;align-items:center;flex-wrap:wrap;gap:9px;padding:14px 22px;background:#10212a}.teaching-tools button,.teaching-tools select{border:1px solid #8ca79d35;border-radius:7px;color:#c2d6d0;background:#1c3039;padding:8px 10px;font-size:11px}.teaching-tools button[aria-pressed=true]{border-color:#9bd8c5;color:#d9f7ec;background:#27473f}.teaching-tools label{display:flex;align-items:center;gap:8px;color:#b7c9c4;font-size:11px}.teaching-tools input[type=range]{width:80px;accent-color:#a6c5b1}.teaching-tools button:focus-visible,.teaching-tabs button:focus-visible,.probe-target:focus-visible{outline:2px solid #b1eacb;outline-offset:3px}.teaching-caption{padding:0 22px 17px;color:#a8bdb8;font-size:11px;line-height:1.75;background:#10212a}.teaching-caption strong{color:#d3e8df;font-weight:500}.flow-dimmer{position:absolute;top:0;right:0;bottom:0;left:0;background:#05101c;pointer-events:none;z-index:1}.native-stage .tunnel-canvas{z-index:2}.native-stage .section-label,.native-stage .flow-kind,.native-stage .tunnel-actions{z-index:4}.native-stage .section-label,.native-stage .flow-kind{pointer-events:none}.force-view .flow-kind{display:none}.native-flow-layer{z-index:0}.probe-target{position:absolute;top:0;right:0;bottom:0;left:0;cursor:crosshair;touch-action:manipulation}.probe-marker{position:absolute;transform:translate(-50%,-50%);border:2px solid #fff;border-radius:50%;width:22px;height:22px;display:grid;place-content:center;color:#fff;background:#10212a99;box-shadow:0 0 0 4px #10212a55;pointer-events:none;font-size:22px}.probe-readout{display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding:14px 22px;background:#1b3338;color:#c4d8d3;border-top:1px solid #afcbb433;font-size:11px}.probe-readout strong{color:#eff8f1;font-weight:500}.probe-readout small{flex-basis:100%;color:#94b0a7;font-size:10px}.probe-readout b{color:#e0f7eb;font-variant-numeric:tabular-nums}@media(max-width:760px){.teaching-tabs{padding:12px 12px 3px}.teaching-tabs button{flex:1;padding:10px 8px;font-size:12px}.teaching-tools{padding:12px;gap:8px}.teaching-caption{padding:0 14px 14px;font-size:10px}.probe-readout{padding:12px 14px}.native-stage.force-view{min-height:320px}}.reference-cases{margin:24px 0}.reference-body .reference-intro,.reference-body article p,.reference-body .reference-links,.reference-theory p{font-size:12px}.reference-grid h3{font-size:16px}.reference-grid summary,.reference-theory label{font-size:12px}.reference-grid table,.reference-provenance{font-size:11px}.teaching-legend{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:0 22px 12px;background:#10212a;color:#bfd3cc;font-size:10px}.teaching-legend i{display:block;width:140px;height:7px;border-radius:4px}.teaching-legend i.speed{background:linear-gradient(90deg,#051040,#1070c0,#20c0a0,#d0e030,#ff3020)}.teaching-legend i.pressure{background:linear-gradient(90deg,#206cff,#eceef2,#ff442a)}.teaching-legend i.vorticity{background:linear-gradient(90deg,#3090ff,#080a12,#ff6030)}.teaching-legend small{margin-left:auto}@media(max-width:760px){.teaching-legend{padding:0 14px 12px}.teaching-legend small{flex-basis:100%;margin-left:0}}.app-utilities{margin-top:92px;height:48px;min-height:48px;padding-block:8px;justify-content:flex-end;border-bottom:0}