:root{color-scheme:dark;--bg:#071624;--panel:#102d42;--line:#315369;--ink:#edf7fc;--muted:#a9c3d4;--cyan:#71ede0;--amber:#ffd099;--red:#f5a0a8;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 82% 3%,#245b7a 0,transparent 37%),radial-gradient(ellipse at 10% 46%,#124450 0,transparent 43%),var(--bg);color:var(--ink)}a{color:var(--cyan)}button,input,select{font:inherit}button,select{color:var(--ink);background:#14394f;border:1px solid #52778b;border-radius:6px;font-size:12px;padding:9px 12px}button{cursor:pointer}button:hover{background:#24566a;border-color:#8ecbd2}button:disabled{opacity:.4;cursor:not-allowed}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible,svg:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}.quiet{background:transparent}input[type=range]{width:100%;accent-color:var(--cyan);height:22px;cursor:pointer;margin:3px 0 0}select{width:100%}.skip{position:absolute;top:-80px;left:15px;z-index:8;background:white;color:#123;padding:12px}.skip:focus{top:10px}header{height:72px;padding:14px 30px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);background:#061a2bb8}.logos{display:flex;align-items:center;gap:20px}.logos img:first-child{width:177px}.logos img:last-child{width:145px}.logos span{height:32px;border-left:1px solid #53778e}header>a:last-child{font-size:12px;text-decoration:none;color:var(--muted)}main{max-width:1500px;margin:auto;padding:0 28px}.related{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}.related a{font-size:11px;border:1px solid #42657a;border-radius:25px;padding:7px 11px;text-decoration:none;color:#c4dce8}.related a[aria-current]{background:#1d5357;border-color:#72c8bd;color:#c5fff3}.intro{padding:28px 0;display:flex;justify-content:space-between;align-items:center;gap:20px}.eyebrow{font-size:10px;letter-spacing:.13em;color:var(--cyan);margin:0 0 10px}h1{font-size:38px;font-weight:500;letter-spacing:-.04em;line-height:1.12;margin:0}h1 span{color:#c2dfed}.intro>div>p:last-child{font-size:14px;color:var(--muted);margin:12px 0 0}.tag{font-size:12px;letter-spacing:.15em;white-space:nowrap}.tag i{display:inline-block;width:7px;height:7px;background:var(--cyan);border-radius:50%;margin-right:10px;box-shadow:0 0 15px var(--cyan)}.tag small{display:block;font-size:11px;letter-spacing:0;color:var(--muted);margin-top:10px}.experiment{display:grid;grid-template-columns:258px minmax(0,1fr);border:1px solid #456e85;border-radius:14px;overflow:hidden;background:#0b2538;box-shadow:0 20px 65px #0003}aside{background:linear-gradient(145deg,#1b4259,#102c40);border-right:1px solid var(--line);padding:20px}.section-no{font-size:11px;color:var(--cyan);display:flex;gap:12px}.section-no span{font-size:8px;letter-spacing:.08em;color:var(--muted);align-self:center}aside h2{font-size:21px;font-weight:500;margin:12px 0 18px}aside>label{display:block;color:var(--muted);font-size:11px;margin:0 0 6px}.control-label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px;margin-top:18px}output{color:var(--cyan);font-size:14px;font-variant-numeric:tabular-nums;white-space:nowrap}.input-note{font-size:10px;color:var(--muted);line-height:1.6;margin:3px 0 0}aside>button{width:100%;margin-top:16px}#balance{border-color:#7bc4b6;color:#c6fff0;background:#20514f}aside>button.quiet{margin-top:10px}.aircraft-spec{margin-top:20px;border-top:1px solid var(--line);padding-top:13px}summary{cursor:pointer;font-size:12px;line-height:1.5;color:#cfe6f0}.aircraft-spec dl{display:grid;grid-template-columns:1fr 1fr;gap:10px 8px;font-size:10px;line-height:1.5}.aircraft-spec dt{color:var(--muted)}.aircraft-spec dd{margin:0;text-align:right}.aircraft-spec p{font-size:10px;color:var(--muted);line-height:1.6}.workspace{min-width:0;display:flex;flex-direction:column}.viewbar{display:flex;justify-content:space-between;gap:10px;padding:15px 18px;font-size:10px;color:#bedbe8;border-bottom:1px solid var(--line);letter-spacing:.05em}.force-stage{background:radial-gradient(ellipse at 50% 45%,#255a75,#0c2338 78%);position:relative;flex:1;min-height:315px;display:flex;align-items:center}.force-stage svg{width:100%;height:auto;display:block;max-height:370px}.status-panel{padding:16px 20px;background:#113f46;border-top:1px solid #386d72;border-bottom:1px solid #386d72}.status-panel>div{display:flex;align-items:center;gap:9px}.status-panel i{width:7px;height:7px;border-radius:50%;background:var(--cyan);flex:none}.status-panel h2{font-size:17px;font-weight:500;margin:0}.status-panel p{font-size:12px;color:#b8d7df;line-height:1.6;margin:7px 0 0}.status-panel[data-state=outside],.status-panel[data-state=deficit]{background:#453137;border-color:#77545d}.status-panel[data-state=outside] i,.status-panel[data-state=deficit] i{background:var(--red)}.readouts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:19px 18px;gap:16px;background:#102d42}.readouts>div+div{border-left:1px solid var(--line);padding-left:14px}.readouts span{font-size:11px;color:var(--muted);display:block}.readouts strong{display:block;font-size:27px;font-weight:500;margin:8px 0 5px;font-variant-numeric:tabular-nums;letter-spacing:-.04em}.readouts em{font-style:normal;font-size:11px;margin-left:4px;letter-spacing:0;color:#c9e1e9}.readouts small{font-size:9px;line-height:1.5;color:var(--muted);display:block}.condition-strip{display:flex;flex-wrap:wrap;gap:12px 20px;padding:13px 18px;border-top:1px solid var(--line);color:#a6c5d6;font-size:11px}.condition-strip b{color:#d4e9f1;font-weight:500}.force-caption{font-size:10px;color:var(--muted);line-height:1.6;margin:0;padding:0 18px 16px}.casebar{padding:13px 17px;margin-top:auto;border-top:1px solid var(--line);background:#18364b;display:flex;gap:7px;flex-wrap:wrap;align-items:center}.casebar>div{flex:1;display:flex;align-items:center;gap:9px;min-width:140px}.casebar b{font-weight:500;color:var(--amber);border:1px solid #bb9571;border-radius:4px;padding:4px 7px}.casebar span{font-size:10px;color:#c5dce6}.casebar button{font-size:10px;padding:8px 9px}#save-a{background:#473e32;border-color:#ab8c67;color:#ffe2bc}.solve-line{color:var(--muted);font-size:10px;text-align:right;margin:11px 0 25px}.card{border:1px solid #355b73;border-radius:13px;background:linear-gradient(135deg,#153c53,#0b2336);padding:23px;min-width:0}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:19px}.section-heading h2,.card h2{font-size:24px;letter-spacing:-.025em;font-weight:500;margin:0}.case-key{display:flex;gap:20px;font-size:11px;white-space:nowrap}.key-a{color:var(--amber)}.key-b{color:var(--cyan)}.case-key span:before{content:'';display:inline-block;width:16px;border-top:2px solid currentColor;vertical-align:middle;margin-right:7px}.key-a:before{border-top-style:dashed!important}.envelope-layout{display:grid;grid-template-columns:2.2fr 1fr;gap:30px;align-items:center}.envelope-layout svg,.curves svg{width:100%;height:auto;display:block;touch-action:none;cursor:crosshair}.caption{font-size:12px;line-height:1.7;color:var(--muted);margin:11px 0 0}.envelope-summary{border-left:1px solid var(--line);padding-left:25px}.envelope-summary>strong{font-size:27px;color:var(--cyan);font-weight:500;display:block;line-height:1.4}.envelope-summary>p:not(.eyebrow){font-size:12px;line-height:1.7;color:var(--muted)}.boundary-key{display:flex;flex-direction:column;gap:11px;font-size:10px;margin:22px 0;color:var(--muted)}.boundary-key span:before{content:'';display:inline-block;width:24px;margin-right:10px;vertical-align:middle;border-top:2px dashed #91acbe}.boundary-key .lift-key:before{border-color:var(--red)}.boundary-key .window-key:before{border-top:8px solid #3f8f8a}.model-chip{border:1px solid #3c657b;background:#15384d;border-radius:7px;padding:11px;font-size:12px;line-height:1.6}.model-chip small{font-size:10px;color:var(--muted)}.curve-section{margin:30px 0}.curves{display:grid;grid-template-columns:1fr 1fr;gap:18px}.curves h3{font-size:18px;font-weight:500;margin:0 0 15px}.curve-section .section-heading .caption{text-align:right;margin:0}.explain-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:27px}#drag-split{margin-top:20px}.split-head{display:flex;justify-content:space-between;font-size:12px;margin:13px 0 7px}.split-head span{color:var(--muted)}.split-head b{font-weight:500}.track{height:8px;background:#071a29;border-radius:8px;overflow:hidden}.track span{display:block;height:100%;background:var(--cyan)}.optima{display:flex;gap:28px;margin-top:24px}.optima>div{flex:1}.optima span{font-size:12px;color:var(--muted);display:block}.optima strong{font-size:25px;font-weight:500;display:block;margin:8px 0;color:#cdf9ef}.optima small{font-size:10px;line-height:1.6;color:var(--muted)}.comparison{margin-bottom:27px}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:12px;margin-top:14px}th,td{padding:12px 10px;text-align:right;border-bottom:1px solid #33566d;white-space:nowrap}th{font-weight:500;font-size:11px}th:first-child,td:first-child{text-align:left;color:#bfd5e2}td:nth-child(2),th:nth-child(2){color:var(--amber)}td:nth-child(3),th:nth-child(3){color:var(--cyan)}td:last-child{color:#d8e9f1}.comparison details{margin-top:18px}.model-notes{border-top:1px solid var(--line);padding:25px 0 35px}.notes-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 35px;margin-top:18px}.notes-grid h3{font-size:16px;font-weight:500}.notes-grid p{font-size:12px;line-height:1.8;color:var(--muted)}.notes-grid .equation{background:#123f49;color:#d4fff0;border-radius:7px;padding:12px 15px;font-size:13px;line-height:1.9}footer{border-top:1px solid var(--line);background:#061321;padding:30px;display:flex;justify-content:space-between;gap:25px}footer b{font-weight:500}footer p{font-size:10px;color:var(--muted);line-height:1.8}footer>div:last-child{display:flex;flex-direction:column;align-items:flex-end;gap:15px;font-size:11px}footer small{font-size:9px;color:var(--muted);letter-spacing:.07em}
@media(max-width:1100px){main{padding:0 18px}.tag{display:none}h1{font-size:33px}.experiment{grid-template-columns:235px minmax(0,1fr)}aside{padding:18px 15px}.force-stage{min-height:280px}.readouts{gap:9px;padding:17px 14px}.readouts>div+div{padding-left:9px}.readouts strong{font-size:23px}.readouts span{font-size:10px}.envelope-layout{grid-template-columns:2fr 1fr;gap:18px}.envelope-summary{padding-left:16px}.card{padding:19px}.envelope-summary>strong{font-size:23px}.section-heading h2,.card h2{font-size:22px}.curves{gap:15px}}
@media(max-width:740px){header{height:59px;padding:12px 14px}.logos{gap:10px}.logos img:first-child{width:118px}.logos img:last-child{width:98px}.logos span{height:24px}header>a:last-child{font-size:9px}main{padding:0 12px}.related{gap:5px;margin-top:15px}.related a{font-size:10px;padding:6px 8px}.intro{padding:24px 0}h1{font-size:32px}h1 span{display:block}.intro>div>p:last-child{font-size:13px}.experiment{display:flex;flex-direction:column}aside{border:0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:0 18px;padding:18px}.section-no,aside h2,aside>label,aside select,aside .aircraft-spec,aside>.input-note,aside>button{grid-column:1/-1}aside h2{margin:10px 0 13px}.control-label{grid-column:1;margin-top:13px;align-self:center;font-size:11px;flex-wrap:wrap;gap:3px}.control-label output{font-size:13px}aside>input{grid-column:2;margin-top:13px;align-self:center}aside>.input-note:not(#balance-note){display:none}aside>button{margin-top:12px}aside .aircraft-spec{margin-top:13px;padding-top:10px}.aircraft-spec dl{font-size:12px}.aircraft-spec p{font-size:11px}.viewbar{padding:12px;font-size:9px}.viewbar span:last-child{display:none}.force-stage{min-height:215px}.status-panel{padding:14px}.status-panel p{font-size:12px}.readouts{grid-template-columns:1fr 1fr;gap:18px;padding:17px}.readouts>div:nth-child(3){border:0;padding-left:0}.readouts strong{font-size:27px}.readouts span{font-size:11px}.condition-strip{gap:10px 16px;padding:12px 15px;font-size:10px}.force-caption{padding:0 15px 13px}.casebar>div{flex-basis:100%;margin-bottom:4px}.casebar{padding:12px}.envelope-layout{display:block}.envelope-summary{border-left:0;border-top:1px solid var(--line);padding:20px 0 0;margin-top:20px}.boundary-key{flex-wrap:wrap;flex-direction:row;gap:15px;margin:15px 0}.model-chip{display:none}.section-heading{align-items:flex-start;flex-wrap:wrap;gap:14px}.eyebrow{font-size:9px}.case-key{font-size:10px}.curves,.explain-grid,.notes-grid{grid-template-columns:1fr}.curve-section .section-heading .caption{text-align:left}.card{padding:17px}.section-heading h2,.card h2{font-size:22px}.curves h3{font-size:17px}.caption{font-size:11px}.table-scroll{margin:0 -6px}table{font-size:11px}td,th{padding:11px 7px}.solve-line{text-align:left;font-size:9px}.optima{gap:14px}.optima strong{font-size:23px}footer{flex-direction:column;padding:24px 16px}footer>div:last-child{align-items:flex-start}}

.quick-controls{display:none}
@media(max-width:740px){aside{order:1;border-top:1px solid var(--line);border-bottom:0}.quick-controls{display:grid;grid-template-columns:1fr 1fr;gap:5px 18px;padding:14px 15px;background:#174653;border-bottom:1px solid var(--line)}.quick-controls label{display:flex;justify-content:space-between;align-items:center;font-size:11px}.quick-controls output{font-size:13px}.quick-controls a{grid-column:1/-1;text-align:right;font-size:10px;text-decoration:none}}