:root{--font-ui: var(--font-text);--accent-ui: var(--accent);--accent-text: var(--accent-ink);--muted: var(--text-2);--line-hard: var(--line-strong);--line-soft: var(--line);--paper-bg: var(--bg);--surface: var(--bg-raised);--raised: var(--bg-raised);--c-bg: var(--night);--c-panel: var(--night-800);--c-text: var(--chalk);--c-muted: #C9C2B3;--c-line: var(--night-700);--c-line-2: #4C473C;--c-accent: var(--copper-400);--c-accent-2: var(--copper-300);--c-good: #8FD6A8;--good: #22744A;--bad: #B3261E;--radius: var(--r-lg);--shadow-xl: var(--shadow-3);--ease: var(--ease-out);--rule: 1px solid var(--line);--t-small: var(--fs-small);--t-label: var(--fs-caption);--c-series-3: #C9C2AE;--c-series-5: #8A93B5;--c-series-6: #77735F;--c-on-accent: #1C1205}.label{display:block;font-size:var(--fs-caption);font-weight:var(--w-semibold);color:var(--text-2);margin:0}.mt-md{margin-top:var(--s-3)}.mt-lg{margin-top:var(--s-5)}.working{border:var(--rule);border-left:2px solid var(--accent);border-radius:var(--r-sm);background:var(--bg-raised);padding:var(--s-3)}.working__list{display:grid;gap:0;border-top:var(--rule);list-style:none;padding:0}.working__list li{display:grid;grid-template-columns:minmax(4.5rem,max-content) 1fr;gap:var(--s-half) var(--s-2);align-items:baseline;padding:var(--s-1-5) 0;border-bottom:var(--rule);font-size:var(--fs-small);color:var(--text-2);line-height:1.5}.working__n{font-family:var(--font-display);font-weight:var(--w-display-strong);font-size:1.125rem;color:var(--text);font-variant-numeric:tabular-nums;white-space:nowrap}.working__sum .working__n{color:var(--accent-ink)}.working__sum{background:color-mix(in srgb,var(--accent) 7%,transparent);padding-inline:var(--s-1);margin-inline:calc(var(--s-1) * -1)}.working__t{min-width:0}@media(max-width:479px){.working__list li{grid-template-columns:1fr;gap:2px}.working__n{font-size:1.25rem}}@property --p{syntax: "<number>"; inherits: false; initial-value: 0;}html:has(.fkt-tool){scroll-padding-top:5.5rem}@media(max-width:939px){html:has(.fkt-tool){scroll-padding-bottom:6rem}}.js-ready .fkt-h1 .wl{overflow:visible;padding:0;margin:0}.js-ready .fkt-h1 .wl>span{transform:none;opacity:1;animation:none;will-change:auto}.fkt-hero{padding-block:clamp(1.5rem,3.2vw,2.75rem) clamp(1.25rem,2.4vw,2rem)}.fkt-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1rem;margin-bottom:1.1rem}.fkt-pill{display:inline-flex;align-items:center;gap:.55em;padding:.45rem .75rem;font:700 .875rem/1 var(--font-ui);letter-spacing:0;text-transform:none;color:var(--accent-text);border:1px solid var(--line-hard);border-radius:99px;background:color-mix(in srgb,var(--accent) 8%,transparent)}.fkt-pill:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.fkt-upd{font:500 .875rem/1.4 var(--font-ui);letter-spacing:0;color:var(--muted);margin:0}.fkt-h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1;letter-spacing:-.018em;max-width:24ch}.fkt-answer{margin-top:clamp(1rem,2vw,1.4rem);padding-left:1.1rem;border-left:2px solid var(--accent-ui);max-width:84ch}.fkt-q{font:700 .9375rem/1.25 var(--font-display);letter-spacing:-.005em;margin:0 0 .4rem;color:var(--accent-text)}.fkt-lede{margin:0;font-size:clamp(1rem,1.3vw,1.125rem);line-height:1.55;text-wrap:pretty}.fkt-answer .fkt-upd{margin-top:.7rem}.fkt-tool-sec{padding-bottom:clamp(1.5rem,3vw,2.5rem)}.fkt-tool{display:grid;gap:1.25rem;grid-template-columns:minmax(0,1fr)}.fkt-tool>*{min-width:0}@media(min-width:940px){.fkt-tool{grid-template-columns:minmax(0,1.1fr) minmax(340px,.9fr);gap:1.75rem;align-items:start}}.fkt-in{display:grid;grid-template-columns:minmax(0,1fr);gap:1.5rem;padding:clamp(1.1rem,2.8vw,1.9rem);background:var(--surface);border:1px solid var(--line);border-radius:14px}.fkt-in fieldset{border:0;margin:0;padding:0;min-width:0;display:grid;grid-template-columns:minmax(0,1fr);gap:1.15rem}.fkt-in legend{padding:0;margin:0 0 .9rem;font:700 .875rem/1 var(--font-ui);letter-spacing:0;text-transform:none;color:var(--accent-text)}.fkt-row2{display:grid;gap:1.15rem;grid-template-columns:minmax(0,1fr)}@media(min-width:560px){.fkt-row2{grid-template-columns:repeat(2,minmax(0,1fr))}}.fkt-f{display:grid;grid-template-columns:minmax(0,1fr);gap:.4rem;align-content:start;min-width:0}.fkt-f>label,.fkt-lbl{font:600 .9375rem/1.3 var(--font-ui);color:var(--ink)}.fkt-opt{font-weight:500;color:var(--muted)}.fkt-hint{margin:0;font-size:var(--fs-caption);line-height:1.45;color:var(--muted)}.fkt-err{margin:0;font-size:var(--fs-caption);line-height:1.4;color:var(--bad);font-weight:600}.fkt-ctl{position:relative;display:flex;align-items:center}.fkt-ctl input,.fkt-ctl select,.fkt-ta{width:100%;min-height:48px;padding:.7rem .9rem;font:500 1rem/1.25 var(--font-ui);color:var(--ink);background:var(--paper-bg);border:1px solid var(--line-hard);border-radius:10px;appearance:none;-webkit-appearance:none;transition:border-color .2s,box-shadow .2s}.fkt-ctl input,.fkt-ctl select{font-variant-numeric:tabular-nums}.fkt-ta{display:block;resize:vertical;min-height:9rem;font:500 .875rem/1.5 var(--font-ui)}.fkt-ctl select{padding-right:2.4rem;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 1.2rem) 50%,calc(100% - .9rem) 50%;background-size:5px 5px;background-repeat:no-repeat}.fkt-ctl select option{background:var(--surface);color:var(--ink)}.fkt-ctl .u{font-size:var(--fs-small);position:absolute;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--muted);font-weight:600}.fkt-pre .u{left:.9rem}.fkt-pre input{padding-left:1.7rem}.fkt-suf .u{right:.9rem}.fkt-suf input{padding-right:2.3rem}.fkt-ctl input:hover,.fkt-ctl select:hover,.fkt-ta:hover{border-color:var(--muted)}.fkt-ctl input:focus-visible,.fkt-ctl select:focus-visible,.fkt-ta:focus-visible,.fkt-extras input:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px;border-color:var(--accent-ui)}[aria-invalid=true]{border-color:var(--bad)!important}.fkt-range{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:0 1rem;align-items:center}.fkt-range output{font:700 1.25rem/1 var(--font-display);font-variant-numeric:tabular-nums;min-width:3.4ch;text-align:right}.fkt-range input[type=range]{--p: 50%;-webkit-appearance:none;appearance:none;width:100%;height:44px;margin:0;background:transparent;cursor:pointer}.fkt-range input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:linear-gradient(to right,var(--accent-ui) var(--p),var(--line-hard) var(--p))}.fkt-range input[type=range]::-moz-range-track{height:6px;border-radius:3px;background:var(--line-hard)}.fkt-range input[type=range]::-moz-range-progress{height:6px;border-radius:3px;background:var(--accent-ui)}.fkt-range input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:24px;height:24px;margin-top:-9px;border-radius:50%;background:var(--surface);border:3px solid var(--accent-ui);box-shadow:0 1px 5px #0000004d}.fkt-range input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--surface);border:3px solid var(--accent-ui)}.fkt-range input[type=range]:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px;border-radius:6px}.fkt-range .fkt-hint{grid-column:1 / -1}.fkt-tag{display:inline-block;margin-left:.4rem;padding:.15rem .5rem;border-radius:99px;font:700 .875rem/1.4 var(--font-ui);letter-spacing:0;text-transform:none;color:var(--accent-text);border:1px solid var(--line-hard);vertical-align:middle}.fkt-seg-row{display:grid;grid-template-columns:minmax(0,1fr);gap:.5rem;padding:.7rem 0;border-top:1px solid var(--line-soft)}@media(min-width:600px){.fkt-seg-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:1rem}}.fkt-seg-row .fkt-hint{grid-column:1 / -1}.fkt-seg-row .fkt-lbl small{display:inline-block;margin-left:.4rem;font:600 .875rem/1 var(--font-ui);color:var(--muted);letter-spacing:0}.fkt-seg{position:relative;display:inline-grid;grid-auto-flow:column;border:1px solid var(--line-hard);border-radius:10px;overflow:hidden;background:var(--paper-bg);justify-self:start}.fkt-seg input{position:absolute;opacity:0;inset:0;width:100%;height:100%;margin:0;pointer-events:none}.fkt-seg label{display:inline-flex;align-items:center;justify-content:center;gap:.4em;min-width:4.5rem;min-height:44px;padding:0 .85rem;font:600 .875rem/1 var(--font-ui);color:var(--muted);cursor:pointer;border-left:1px solid var(--line-hard);-webkit-user-select:none;user-select:none}.fkt-seg label:first-of-type{border-left:0}.fkt-seg input:checked+label{background:var(--ink);color:var(--paper-bg)}.fkt-seg input:checked+label:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.fkt-seg input:focus-visible+label{outline:3px solid var(--accent-ui);outline-offset:-3px}.fkt-check{display:flex;align-items:flex-start;gap:.7rem;min-height:44px;cursor:pointer;font-size:var(--fs-small);line-height:1.4}.fkt-check input{width:22px;height:22px;margin:.1rem 0 0;flex:none;accent-color:var(--accent-ui);cursor:pointer}.fkt-check input:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px}.fkt-bench{border:1px dashed var(--line-hard);border-radius:12px;background:var(--paper-bg)}.fkt-bench>summary{display:flex;flex-wrap:wrap;align-items:center;gap:.2rem .6rem;min-height:48px;padding:.7rem 1rem;font:600 .9375rem/1.3 var(--font-ui);color:var(--ink);cursor:pointer;list-style:none}.fkt-bench>summary::-webkit-details-marker{display:none}.fkt-bench>summary:after{content:"";margin-left:auto;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s}.fkt-bench[open]>summary:after{transform:rotate(-135deg)}.fkt-bench>summary:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px;border-radius:12px}.fkt-bench-in{display:grid;grid-template-columns:minmax(0,1fr);gap:.7rem;padding:0 1rem 1rem}.fkt-bench-in p{margin:0;font-size:var(--fs-caption);line-height:1.45;color:var(--muted)}.fkt-bench-in a{color:var(--accent-text);text-decoration:underline;text-underline-offset:3px}.fkt-btab{table-layout:auto}.fkt-btab th,.fkt-btab td{padding:.45rem .4rem}.fkt-btab th[scope=row]{min-width:8.5rem;font:600 .875rem/1.3 var(--font-ui);letter-spacing:0;text-transform:none;color:var(--ink);background:transparent;white-space:normal}.fkt-btab th[scope=col]{white-space:normal;vertical-align:bottom;line-height:1.25}.fkt-btab th[scope=row] small{display:block;margin-top:.15rem;font:500 .875rem/1.3 var(--font-ui);color:var(--muted);font-variant-numeric:tabular-nums}.fkt-btab tr.is-you th[scope=row]{background:color-mix(in srgb,var(--accent) 18%,transparent);box-shadow:inset 3px 0 0 var(--accent-ui)}.fkt-btab tr.is-you td{background:color-mix(in srgb,var(--accent) 10%,transparent)}.fkt-btab tr.is-you th[scope=row] small:after{content:" \b7  Your trade";font-weight:700;color:var(--accent-text)}.fkt-fill{min-height:44px;min-width:3.9rem;padding:0 .5rem;font:700 .9375rem/1 var(--font-ui);font-variant-numeric:tabular-nums;color:var(--ink);background:var(--surface);border:1px solid var(--line-hard);border-radius:10px;cursor:pointer}.fkt-fill:hover{border-color:var(--accent-ui)}.fkt-fill:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px}.fkt-fill[aria-pressed=true]{border-color:var(--accent-ui);background:color-mix(in srgb,var(--accent) 10%,transparent)}.fkt-btn2{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:44px;padding:0 1rem;font:600 .875rem/1 var(--font-ui);color:var(--ink);background:transparent;border:1px solid var(--line-hard);border-radius:10px;cursor:pointer;text-decoration:none}.fkt-btn2:hover{border-color:var(--accent-ui);color:var(--accent-text)}.fkt-btn2:focus-visible{outline:2px solid var(--accent-ui);outline-offset:2px}.fkt-rows{display:grid;grid-template-columns:minmax(0,1fr);gap:.6rem}.fkt-rowc{display:grid;gap:.5rem .75rem;grid-template-columns:minmax(0,1fr) minmax(0,1fr);padding:.8rem;border:1px solid var(--line);border-radius:12px;background:var(--paper-bg)}.fkt-rowc .fkt-f:first-child{grid-column:1 / -1}.fkt-rowc .fkt-check{grid-column:1}.fkt-rowc .fkt-btn2{justify-self:end}@media(min-width:640px){.fkt-rowc{grid-template-columns:minmax(0,1.4fr) 5.5rem 6.5rem auto auto;align-items:end}.fkt-rowc .fkt-f:first-child{grid-column:auto}}.fkt-console{position:relative;overflow:hidden;isolation:isolate;color:var(--c-text);min-height:25rem;padding:clamp(1.15rem,2.6vw,1.75rem);border:1px solid var(--c-line-2);border-radius:var(--radius, 14px);background:radial-gradient(120% 70% at 100% 0%,rgba(232,135,74,.17),transparent 58%),var(--c-bg);box-shadow:var(--shadow-xl)}.fkt-console:before{content:"";position:absolute;inset:0;z-index:-1;opacity:.55;pointer-events:none;background-image:linear-gradient(var(--c-line) 1px,transparent 1px),linear-gradient(90deg,var(--c-line) 1px,transparent 1px);background-size:30px 30px;-webkit-mask-image:linear-gradient(180deg,#000,transparent 75%);mask-image:linear-gradient(180deg,#000,transparent 75%)}@media(min-width:940px){.fkt-console{position:sticky;top:5.5rem;z-index:2}}.fkt-ch{display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap;font:700 .875rem/1.3 var(--font-ui);letter-spacing:0;text-transform:none;color:var(--c-muted)}.fkt-live{display:inline-flex;align-items:center;gap:.55em}.fkt-live:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c-accent);animation:fkt-pulse 2.6s ease-out infinite}@keyframes fkt-pulse{0%{box-shadow:0 0 #e8874a8c}70%,to{box-shadow:0 0 0 8px #e8874a00}}.fkt-ex{padding:.35rem .6rem;border-radius:99px;color:var(--c-on-accent);background:var(--c-accent-2);letter-spacing:.06em;text-transform:none;font-size:var(--fs-caption)}.fkt-cl{margin:1.2rem 0 0;font:600 .9375rem/1.3 var(--font-ui);color:var(--c-muted)}.fkt-big{margin:.35rem 0 0;min-height:1.05em;font:700 clamp(2.9rem,5.4vw,4.4rem)/1 var(--font-display);letter-spacing:-.018em;font-variant-numeric:tabular-nums;color:var(--c-text);overflow-wrap:anywhere}.fkt-rule{height:2px;margin:.9rem 0 0;background:linear-gradient(90deg,var(--c-accent),transparent 85%);transform:scaleX(0);transform-origin:left}.fkt-rule.is-in{transform:scaleX(1);transition:transform .9s var(--ease-out)}.fkt-sub{margin:.9rem 0 0;min-height:1.5em;font:600 1.0625rem/1.4 var(--font-ui);color:var(--c-text)}.fkt-band,.fkt-note{margin:.7rem 0 0;font-size:var(--fs-small);line-height:1.5;color:var(--c-muted)}.fkt-note{color:var(--c-muted);font-size:var(--fs-caption)}.fkt-band:empty,.fkt-note:empty{display:none}.fkt-console a{color:var(--c-accent-2)}.fkt-share{margin-top:1.25rem;padding-top:1rem;border-top:1px solid var(--c-line);display:grid;grid-template-columns:minmax(0,1fr);gap:.5rem}.fkt-share p{margin:0;font-size:var(--fs-caption);line-height:1.45;color:var(--c-muted)}.fkt-share .fkt-sharerow{display:flex;gap:.5rem}.fkt-share .fkt-sharerow:has([data-copy-link]:disabled){display:none}.fkt-share:has([data-copy-link]:not(:disabled)) [data-share-hint]{display:none}.fkt-share input{flex:1;min-width:0;min-height:44px;padding:0 .75rem;font:500 var(--fs-caption) var(--font-ui);color:var(--c-text);background:var(--c-panel);border:1px solid var(--c-line-2);border-radius:9px}.fkt-share input:disabled{color:var(--c-muted);background:transparent;border-style:dashed}.fkt-share button{min-height:44px;padding:0 1rem;font:700 var(--fs-caption) var(--font-ui);color:var(--c-text);background:transparent;border:1px solid var(--c-line-2);border-radius:9px;cursor:pointer}.fkt-share button:disabled{color:var(--c-muted);border-style:dashed;cursor:not-allowed}.fkt-share button:not(:disabled):hover{border-color:var(--c-accent)}.fkt-share input:focus-visible,.fkt-share button:focus-visible{outline:2px solid var(--c-accent-2);outline-offset:2px}.fkt-viz{margin-top:1.25rem;min-height:4.5rem}.fkt-stack{display:flex;height:14px;gap:2px;border-radius:7px;overflow:hidden;background:var(--c-line)}.fkt-stack i{display:block;flex:var(--w, 0) 1 0;min-width:0;transition:flex-grow .45s var(--ease-out)}.fkt-leg{display:grid;grid-template-columns:minmax(0,1fr);gap:.35rem;margin:.85rem 0 0;padding:0;list-style:none;font-size:var(--fs-caption);color:var(--c-muted)}.fkt-leg li{display:flex;align-items:center;gap:.6rem}.fkt-leg li:before{content:"";width:10px;height:10px;border-radius:3px;flex:none;background:var(--k, var(--c-accent))}.fkt-leg b{margin-left:auto;color:var(--c-text);font-variant-numeric:tabular-nums}.k1{--k: var(--c-accent)}.k2{--k: var(--c-accent-2)}.k3{--k: var(--c-series-3)}.k4{--k: var(--c-good)}.k5{--k: var(--c-series-5)}.k6{--k: var(--c-series-6)}.fkt-stack i{background:var(--k)}.fkt-ringw{position:relative;display:grid;place-items:center;width:8.5rem;aspect-ratio:1}.fkt-ring{--p: 0;position:absolute;inset:0;border-radius:50%;transition:--p .6s var(--ease-out);background:conic-gradient(var(--c-accent) calc(var(--p) * 1%),var(--c-line-2) 0);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 11px),#000 calc(100% - 10px));mask:radial-gradient(farthest-side,transparent calc(100% - 11px),#000 calc(100% - 10px))}.fkt-ringw span{position:relative;font:700 1.5rem/1 var(--font-display);font-variant-numeric:tabular-nums}.fkt-ringrow{display:flex;align-items:center;gap:1.1rem}.fkt-ringrow 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