:root{--ink:#142e3b;--muted:#607782;--teal:#087f76;--blue:#668fae;--line:#dce6e8;--paper:#f4f7f7;--white:#fff;--soft:#eaf4f1;--danger:#a53d35;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-size:14px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:var(--teal);text-underline-offset:3px}button,input,select,textarea{font:inherit}button,.button{cursor:pointer;text-decoration:none;border-radius:7px;padding:11px 15px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;gap:12px;font-weight:600;transition:background .15s}button:hover:not(:disabled),.button:hover{filter:brightness(.96)}button:disabled,input:disabled,.file-button:has(input:disabled){opacity:.45;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,.file-button:focus-within{outline:3px solid #75bdb3;outline-offset:2px}.primary{background:var(--teal);color:white;border-color:var(--teal)}.secondary{background:white;color:var(--ink)}.quiet{border-color:transparent;background:transparent;color:var(--teal)}.small{padding:7px 10px;font-size:12px}.file-button{width:100%;justify-content:space-between;position:relative;overflow:hidden}.file-button input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}.masthead{max-width:1500px;margin:0 auto;padding:35px 38px 28px;display:flex;justify-content:space-between;align-items:flex-start}.brand{font-size:12px;font-weight:750;letter-spacing:.15em;text-decoration:none;color:var(--teal)}h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:38px;letter-spacing:-1.2px;margin:16px 0 9px}h2{font-size:16px;letter-spacing:-.25px;margin:8px 0}p{line-height:1.55}.masthead p{margin:0;color:var(--muted);font-size:15px}.local-badge{display:flex;align-items:center;gap:8px;border:1px solid #cddfdb;background:#edf5f2;border-radius:30px;font-size:12px;padding:9px 13px;margin-top:5px;color:#32625c}.local-badge span{width:7px;height:7px;border-radius:50%;background:var(--teal)}.layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:24px;max-width:1500px;margin:0 auto;padding:0 38px}.panel{background:white;border:1px solid var(--line);border-radius:12px;box-shadow:0 2px 4px #153b4010}.controls{padding:24px;align-self:start}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.eyebrow{font-size:10px;letter-spacing:.15em;font-weight:750;color:var(--muted)}.tag{font-size:10px;font-weight:650;border:1px solid var(--line);border-radius:20px;padding:5px 9px;white-space:nowrap;background:#f8fafb}.tag.active{background:var(--soft);color:var(--teal);border-color:#c8e2dc}.muted{color:var(--muted);font-size:12px}.hint{font-size:11px;line-height:1.55;color:var(--muted);margin:9px 0}.hint code{font-size:11px}hr{border:0;border-top:1px solid var(--line);margin:23px 0}fieldset{padding:0;margin:0;border:0;min-width:0}legend{padding:0;margin-bottom:15px}label{font-size:12px;font-weight:600;display:block;margin:12px 0 7px}select,input,textarea{width:100%;border:1px solid #cddadd;border-radius:6px;padding:10px;background:#fff;color:var(--ink)}textarea{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:1.5;resize:vertical}select{font-size:12px}input[type=number]{font-variant-numeric:tabular-nums}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:2px 12px}.button-row{display:flex;gap:8px;flex-wrap:wrap}.formula-feedback{font-size:11px;color:var(--teal);min-height:14px;margin:9px 0}.formula-feedback.invalid{color:var(--danger)}details{font-size:11px;margin-top:10px}summary{cursor:pointer;color:var(--muted)}.derivatives{overflow-wrap:anywhere;font:10px/1.7 ui-monospace,monospace;max-height:240px;overflow-y:auto}.derivatives p{margin:6px 0}.constraint{display:flex;gap:10px;background:var(--soft);border-radius:7px;padding:12px;margin-top:20px;font-size:11px}.constraint strong,.constraint span:not(.constraint-icon){display:block}.constraint span:not(.constraint-icon){color:#52716e;margin-top:5px;line-height:1.5}.constraint-icon{color:var(--teal);font-weight:700}.run-buttons{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:23px}.run-buttons .primary{grid-column:1/-1;justify-content:space-between}.workspace{display:flex;flex-direction:column;gap:20px;min-width:0}.plot-panel{overflow:hidden}.plot-header{display:flex;justify-content:space-between;align-items:center;padding:23px 26px 9px}.plot-header h2{font-size:22px;font-weight:500;margin:7px 0}.status-row{display:flex;justify-content:space-between;gap:12px;padding:0 26px 14px;color:var(--muted);font-size:12px;min-height:30px}.status-row #elapsed{font-variant-numeric:tabular-nums;white-space:nowrap}.shape-wrap{position:relative;min-height:300px;background:linear-gradient(180deg,#fcfdfd,white);border-top:1px solid #edf1f1}#shape{display:block;width:100%;height:clamp(330px,40vw,480px)}.plot-note{position:absolute;left:24px;bottom:8px;line-height:1.6;font-size:10px;color:var(--muted);pointer-events:none}.plot-note span{font-size:9px;color:#87989f}.legend{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;padding:16px;font-size:11px;color:var(--muted)}.legend>span{display:flex;align-items:center;gap:7px}.swatch{display:inline-block;width:17px;height:3px}.swatch.best{background:var(--teal)}.swatch.current{background:var(--blue)}.swatch.disk{border-top:2px dashed #aab8be}.metrics{display:grid;grid-template-columns:repeat(4,1fr);background:#f9fbfb;border-top:1px solid var(--line);padding:20px 12px}.metrics>div{padding:0 12px;border-right:1px solid var(--line)}.metrics>div:last-child{border:0}.metrics span{display:block;color:var(--muted);font-size:10px;margin-bottom:7px}.metrics strong{font-size:19px;font-weight:550;font-variant-numeric:tabular-nums;letter-spacing:-.5px}.lower-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px}.history-panel,.spectrum-panel{padding:20px;min-width:0}.history-panel h2,.spectrum-panel h2{font-size:14px}#history{width:100%;display:block;margin:10px 0 0;min-height:160px}.spectrum-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:20px;margin-top:15px}.spectral-row{display:flex;justify-content:space-between;font-size:12px;padding:8px 0;border-bottom:1px solid #eef2f2;font-variant-numeric:tabular-nums}.spectral-row span{color:var(--muted)}.spectral-row strong{font-weight:550}.save-panel{padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}.save-panel h2{margin:0 0 6px}.save-panel p{margin:0;font-size:11px}.save-panel button{font-size:11px;padding:9px 12px}.disclaimer{margin:0;padding:0 5px;font-size:11px;line-height:1.7;color:var(--muted)}.error{margin:0 24px 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@media(min-width:1400px){.layout{grid-template-columns:340px minmax(0,1fr)}}
@media(max-width:1050px){.layout{padding:0 22px;gap:18px;grid-template-columns:290px minmax(0,1fr)}.masthead{padding:28px 22px}.controls{padding:20px}.lower-grid{grid-template-columns:1fr}.metrics{grid-template-columns:1fr 1fr;row-gap:16px}.metrics>div:nth-child(2){border-right:0}.local-badge{font-size:10px}.legend{gap:14px}}
@media(max-width:730px){.masthead{display:block;padding:24px 18px}.masthead h1{font-size:32px}.masthead p{font-size:13px}.local-badge{display:inline-flex;margin-top:18px}.layout{display:flex;flex-direction:column;padding:0 14px}.controls{width:100%;padding:22px}.workspace{width:100%}.plot-header{padding:20px 18px 9px}.status-row{padding:0 18px 14px}.metrics strong{font-size:18px}#shape{height:360px}.plot-note{left:15px;font-size:9px}.save-panel{align-items:flex-start}.save-panel .button-row{width:100%}.save-panel button{flex:1 1 40%}footer{padding:20px 18px;flex-direction:column}.controls hr{margin:18px 0}}