:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:#e8f3fa;background:#091625;font-synthesis:none;scroll-behavior:smooth}*{box-sizing:border-box}body{margin:0;min-width:320px;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #6ee6c8;outline-offset:3px}.shell{width:min(1180px,calc(100% - 64px));margin-inline:auto}.nav{height:90px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #28415485}.brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:750;letter-spacing:.12em}.mark{height:35px;width:35px;display:grid;place-items:center;color:#6ee6c8;border:1px solid #6ee6c8;border-radius:10px;font-size:20px;letter-spacing:-.1em}.soft{color:#89a4b5;font-weight:500}.nav nav{display:flex;gap:35px;align-items:center;font-size:13px;color:#b9cddd}.nav nav a:hover,footer a:hover{color:#6ee6c8}.nav-github{border:1px solid #355267;padding:9px 16px;border-radius:9px}.hero{min-height:600px;display:grid;grid-template-columns:1.03fr .97fr;gap:64px;align-items:center;padding-block:72px 90px}.eyebrow{color:#6ee6c8;letter-spacing:.15em;font-weight:750;font-size:11px}.dim{color:#91acbe}.led{display:inline-block;background:#6ee6c8;border-radius:50%;width:7px;height:7px;box-shadow:0 0 12px #6ee6c899;vertical-align:middle;margin-right:6px}.hero h1{font-size:clamp(43px,5.1vw,72px);letter-spacing:-.065em;font-weight:700;line-height:1.13;margin:25px 0}.hero h1 em{font-style:normal;color:#6ee6c8}.lead{color:#adbfcd;font-size:16px;line-height:1.85;max-width:560px}.buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:27px}.button{border:1px solid transparent;padding:12px 17px;border-radius:8px;display:inline-block;font-size:13px;font-weight:700;cursor:pointer}.primary{background:#6ee6c8;color:#08261f}.primary:hover{background:#99f8da}.secondary{border-color:#426074;color:#dce8ef}.secondary:hover{border-color:#6ee6c8}.facts{display:flex;gap:19px;justify-content:space-between;border-top:1px solid #2e485b;margin-top:51px;padding-top:21px}.facts div{display:flex;flex-direction:column;gap:6px}.facts small{color:#849fb1;font-size:10px;letter-spacing:.08em}.facts strong{font-size:12px;font-weight:600}.hero-diagram{border:1px solid #32536b;background:#0f2334;border-radius:16px;padding:24px;box-shadow:0 18px 80px #0003}.diagram-label,.diagram-legend{display:flex;justify-content:space-between;align-items:center;gap:10px;color:#93afbf;font-size:10px;letter-spacing:.13em}.hero-diagram svg{width:100%;height:auto;display:block;margin:12px 0 4px}.diagram-legend{justify-content:flex-start;gap:22px;letter-spacing:0;font-size:12px}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;vertical-align:middle;margin-right:6px}.green{background:#6ee6c8}.amber{background:#f5bc79}.small{font-size:11px;line-height:1.7}.muted{color:#8ba7b7}.hero-diagram .small{margin:15px 0 0}.workbench-wrap{background:#0c1d2e;border-block:1px solid #254057;padding-block:83px 100px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:33px}.section-head h2{font-size:clamp(29px,4vw,43px);letter-spacing:-.05em;line-height:1.2;margin:8px 0}.section-head>p{max-width:420px;color:#aac0ce;font-size:14px}.workbench{display:grid;grid-template-columns:340px minmax(0,1fr);gap:18px;align-items:start}.panel{border:1px solid #2d5067;background:#11293e;border-radius:12px}.inputs{padding:25px;position:sticky;top:14px}.panel-title{display:flex;justify-content:space-between;gap:10px;color:#9db5c5;font-weight:700;letter-spacing:.12em;font-size:10px}.indicator{color:#6ee6c8;font-size:9px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:16px 12px;margin-top:29px}.fields label{display:flex;flex-direction:column;gap:7px;font-size:12px;font-weight:650;min-width:0}.fields small{font-size:10px;color:#829bad;font-weight:400}.fields input,.fields select{background:#0b2031;border:1px solid #3c5f73;border-radius:7px;color:#f1f8fb;padding:11px 10px;width:100%;min-width:0;font-size:15px}.fields input:focus,.fields select:focus{border-color:#6ee6c8}.fields .full{grid-column:1/-1}.joined{display:grid;grid-template-columns:1fr 113px;gap:8px}.input-actions{display:flex;align-items:center;gap:12px;margin-top:28px}.reset{background:transparent;border:0;text-decoration:underline;color:#a4bccb;font-size:12px;font-weight:400;padding:8px}.inputs>.small{margin:20px 0 0}.error{color:#ffbaad;font-size:12px}.output{display:flex;flex-direction:column;gap:18px;min-width:0}.prices{display:grid;grid-template-columns:1fr 1fr;gap:18px}.price-box{padding:24px}.price-box .panel-title span{font:italic 21px Georgia,serif}.price-box strong{display:block;font-size:clamp(34px,4.5vw,56px);letter-spacing:-.05em;margin:7px 0;font-variant-numeric:tabular-nums}.call-txt{color:#6ee6c8}.put-txt{color:#f5bc79}.price-box small{color:#89a8bb;font-size:11px}.chart-box,.greek-box{padding:24px}.chart-top{display:flex;justify-content:space-between;align-items:center;gap:20px}.chart-top h3{font-size:21px;letter-spacing:-.025em;margin:7px 0 0}.legend{display:flex;gap:15px;font-size:12px;color:#b2cad8}#curve{margin:18px 0 0;min-height:260px}#curve svg{width:100%;height:auto;max-height:325px;display:block}table{border-collapse:collapse;width:100%;margin-top:18px}th,td{text-align:right;border-bottom:1px solid #29485e;padding:10px 4px;font-size:13px;font-variant-numeric:tabular-nums}th:first-child,td:first-child{text-align:left}th{color:#98b4c5;letter-spacing:.08em;font-size:10px;text-transform:uppercase}tr:last-child td{border-bottom:0}td small{display:block;color:#849fae;font-size:10px}.method{padding-block:92px 105px}.method-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:75px}.formula-wrap{border-top:1px solid #34566a;padding-top:24px}.formula-wrap h3{font-size:30px;letter-spacing:-.04em;margin:12px 0 16px}.formula-wrap p{color:#a5becd}.formula{background:#132d40;padding:16px 18px;border-left:2px solid #6ee6c8;white-space:nowrap;overflow-x:auto;font:17px Georgia,serif;margin:14px 0}.limitations{display:flex;flex-direction:column;gap:18px}.limitations article{padding-bottom:16px;border-bottom:1px solid #2c475b}.limitations span{font-size:10px;letter-spacing:.13em;color:#6ee6c8}.limitations h4{font-size:17px;margin:8px 0}.limitations p{font-size:13px;color:#9bb3c1;margin:0}footer{background:#07131f;border-top:1px solid #243e52;padding:35px 0 48px}.footer-content{display:flex;align-items:center;justify-content:space-between;gap:16px}.footer-content>div{display:flex;flex-direction:column;align-items:end;color:#92aebd;font-size:11px;gap:7px}@media(max-width:1000px){.hero{gap:26px}.hero h1{font-size:49px}.workbench{grid-template-columns:290px minmax(0,1fr)}.method-grid{gap:28px}}@media(max-width:740px){.shell{width:min(100% - 38px,600px)}.nav{height:73px}.nav nav a:not(.nav-github){display:none}.hero{display:flex;flex-direction:column;align-items:stretch;padding:57px 0 63px}.hero h1{font-size:clamp(39px,8.5vw,58px)}.facts{margin-top:35px;gap:10px}.facts strong{font-size:11px}.workbench-wrap{padding-block:60px}.section-head{display:block}.workbench,.method-grid{grid-template-columns:1fr}.inputs{position:static}.price-box{padding:18px}.price-box strong{font-size:39px}.chart-box,.greek-box{padding:18px}.method{padding-block:70px}.footer-content{flex-direction:column;align-items:start}.footer-content>div{align-items:start}}@media(max-width:410px){.prices{gap:8px}.price-box{padding:12px}.price-box strong{font-size:30px}.price-box .panel-title{font-size:9px}.facts{flex-wrap:wrap}.legend{gap:9px;font-size:10px}}