:root{--paper:#f3f4f5;--paper-2:#fff;--ink:#191a1c;--muted:#4a4e54;--line:#cfd2d6;--field-border:#767b82;--pine:#1f5c4a;--accent:#3a4450;--accent-hover:#2c3440;--warn-bg:#e6e4e0;--focus:#3a4450;--banner:#222428;--banner-text:#eef0f2;--banner-link:#d5dbe3;--radius:3px;--max:68rem;--sans:"Avenir Next", "Segoe UI", ui-sans-serif, system-ui, sans-serif;--serif:"Iowan Old Style", "Palatino Linotype", Palatino, Palladio, Georgia, ui-serif, serif}*{box-sizing:border-box}html{color-scheme:light}body{background:var(--paper);color:var(--ink);font-family:var(--sans);margin:0;font-size:1rem;line-height:1.6}a{color:var(--accent);text-underline-offset:.15em}a:hover{color:var(--accent-hover)}.skip{position:absolute;top:0;left:-999px}.skip:focus{background:var(--paper-2);z-index:20;padding:.4rem .7rem;top:1rem;left:1rem}.site-header,.site-footer,main{width:min(var(--max), calc(100% - 2rem));margin-inline:auto}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:baseline;padding:1.75rem 0 1rem;display:flex}.wordmark{font-family:var(--serif);color:var(--ink);letter-spacing:-.03em;font-size:1.35rem;font-weight:600;text-decoration:none}.wordmark span{color:var(--pine)}.credit{color:var(--muted);letter-spacing:.04em;font-size:.8125rem;text-decoration:none}h1,h2,h3{font-family:var(--serif);letter-spacing:-.025em;color:var(--ink);font-weight:600;line-height:1.22}h1{margin:2rem 0 .7rem;font-size:clamp(1.7rem,3.1vw,2.25rem)}h2{font-size:1.28rem}h3{font-size:1.08rem}.lede{max-width:38rem;color:var(--muted);margin:0 0 .4rem;font-size:1.0625rem;line-height:1.55}.tool-grid{gap:1.25rem;margin:2rem 0 1rem;display:grid}@media (width>=720px){.tool-grid{grid-template-columns:1fr 1fr;align-items:start}}fieldset{border:1px solid var(--field-border);background:var(--paper-2);border-radius:var(--radius);min-width:0;margin:0;padding:1rem 1.1rem 1.2rem}legend{letter-spacing:-.01em;padding:0 .25rem;font-size:.9rem;font-weight:650}label{color:var(--muted);margin:.7rem 0 .25rem;font-size:.78rem;line-height:1.3;display:block}select,input[type=text],input[type=number]{width:100%;font:inherit;border:1px solid var(--field-border);border-radius:var(--radius);background:var(--paper-2);color:var(--ink);padding:.5rem .6rem}input[type=text],input[type=number]{font-variant-numeric:tabular-nums}select:disabled,option:disabled{color:#8b8f96}button,.btn{font:inherit;background:var(--accent);color:#f3f4f5;border-radius:var(--radius);cursor:pointer;border:0;padding:.6rem 1.15rem;font-weight:600}button.secondary{color:var(--ink);border:1px solid var(--line);background:0 0}.banner button,.banner button.secondary{color:#191a1c;border-radius:var(--radius);background:#eef0f2;border:0;padding:.6rem 1.15rem;font-weight:600}.banner button:hover,.banner button:focus-visible,.banner button.secondary:hover,.banner button.secondary:focus-visible{color:#191a1c;background:#eef0f2}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.banner button:focus-visible,.banner a:focus-visible{outline-color:var(--banner-text)}.size-row{border-top:1px solid var(--line);min-width:0;margin-top:.85rem;padding-top:.75rem}.submit-row{margin:.25rem 0 0}.result-block{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);margin:2rem 0 2.5rem;padding:1.75rem 1.6rem 2rem}.result-block h2{font-variant-numeric:tabular-nums;margin:0 0 .85rem;font-size:1.42rem;line-height:1.3}.result-block>p{max-width:42rem;margin:.45rem 0}.warn{border-left:2px solid var(--accent);background:0 0;border-radius:0;margin:1rem 0 0;padding:.1rem 0 .1rem .9rem}.disclaimers{border-top:1px solid var(--line);color:var(--muted);margin-top:1.6rem;padding-top:1.15rem;font-size:.875rem;line-height:1.5}.disclaimers p{margin:.35rem 0}figure{margin:1.1rem 0 0}.result-block figure{background:var(--paper);border:1px solid var(--line);margin:1.5rem 0 0;padding:1.05rem .85rem .55rem}figcaption{font-family:var(--sans);letter-spacing:0;color:var(--ink);margin-bottom:.55rem;font-size:.82rem;font-weight:600}.ratio-chart{width:100%;height:auto;display:block}.chart-line{stroke:var(--accent);stroke-width:1.8px}.chart-mean{stroke:var(--ink);stroke-dasharray:3 4;stroke-width:1.1px;opacity:.5}.chart-grid{stroke:var(--line);stroke-width:1px}.chart-tick,.chart-x,.chart-axis,.chart-mean-label{fill:var(--muted);font-size:11px;font-family:var(--sans)}.state{background:var(--paper-2);border:1px dashed var(--line);border-radius:var(--radius);padding:1rem 1.1rem}.prose{max-width:40rem;padding-bottom:3.5rem}.prose p{margin:.85rem 0}.site-footer{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;gap:.45rem 1.2rem;padding:1.4rem 0 3rem;font-size:.8125rem;display:flex}.site-footer button.linkish{color:inherit;text-underline-offset:.15em;background:0 0;border-radius:0;padding:0;font-weight:500;text-decoration:underline}.banner{background:var(--banner);color:var(--banner-text);z-index:10;padding:1rem;position:sticky;bottom:0}.banner-inner{width:min(var(--max), calc(100% - 0rem));flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.8rem 1rem;margin:0 auto;display:flex}.banner p{max-width:46rem;margin:0}.banner a{color:var(--banner-link)}.banner-actions{flex-wrap:wrap;gap:.5rem;display:flex}.legal-list{padding-left:1.2rem}.note{color:var(--muted);margin:.6rem 0 2rem;font-size:.875rem}