:root{color-scheme:light;--color-paper:#f6f8f7;--color-surface:#fff;--color-field:#fbfcfc;--color-ink:#10272e;--color-ink-soft:#314c54;--color-muted:#536b72;--color-rule:#dce5e5;--color-rule-strong:#aebfc1;--color-accent:#087b75;--color-accent-ink:#075d59;--color-accent-light:#a7e0d9;--color-display:#073e40;--color-display-text:#f5fbfa;--color-display-muted:#c5dddd;--color-mist:#ecf2f1;--color-pale:#f9fbfa;--color-danger:#a4193d;--color-notice:#eaf3ee;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4.5rem;--font-sans:"Aptos", "Segoe UI", ui-sans-serif, system-ui, sans-serif;--font-display:Georgia, "Times New Roman", serif;--font-mono:ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;--text-micro:.73rem;--text-small:.8125rem;--text-label:.875rem;--text-body:1rem;--text-lead:1.125rem;--text-h3:1.2rem;--text-h2:clamp(2rem, 3vw, 2.7rem);--text-h1:clamp(2.6rem, 4vw, 4.1rem);--text-display:clamp(3.2rem, 5vw, 5.4rem);--text-readout:clamp(3rem, 5vw, 4.6rem);--content-width:1312px;--measure:68ch}*,:before,:after{box-sizing:border-box}body,h1,h2,h3,p,figure,dl,dd{margin:0}button,input,select,textarea{font:inherit}button,select{cursor:pointer}img,svg{max-width:100%;display:block}fieldset{border:0;min-width:0;margin:0;padding:0}legend{padding:0}[hidden]{display:none!important}body{background:var(--color-paper);color:var(--color-ink);font-family:var(--font-sans);font-size:var(--text-body);-webkit-font-smoothing:antialiased;line-height:1.6}a{color:var(--color-accent-ink);text-underline-offset:.2em;text-decoration-color:#99b4b2}a:hover{color:var(--color-ink);text-decoration-color:currentColor}button{color:inherit}:focus-visible{outline:3px solid var(--color-accent);outline-offset:3px}::selection{background:#c3e7e3}h1,h2,h3{color:var(--color-ink);letter-spacing:-.035em;text-wrap:balance;font-weight:650;line-height:1.12}h1{font-size:var(--text-h1)}h2{font-size:var(--text-h2)}h3{font-size:var(--text-h3)}p{color:var(--color-ink-soft)}button,input,select{min-height:44px}button:disabled{cursor:default;opacity:.55}.container{width:min(var(--content-width), calc(100% - 2 * var(--space-6)));margin-inline:auto}.section{padding-block:var(--space-8)}.ruler{background:repeating-linear-gradient(90deg,#8eb6b4 0 1px,#0000 1px 12px),repeating-linear-gradient(90deg,#c5dfd9 0 2px,#0000 2px 96px);border:0;height:5px;margin:0}.label{font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.14em;text-transform:uppercase;color:var(--color-muted);font-weight:600}.label-accent{color:var(--color-accent-ink)}.lead{max-width:58ch;font-size:var(--text-lead);line-height:1.6}.hint{color:var(--color-muted);font-size:var(--text-small);line-height:1.55;display:block}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{top:var(--space-2);left:var(--space-2);z-index:20;padding:var(--space-3) var(--space-4);background:var(--color-display);color:#fff;position:absolute;transform:translateY(-200%)}.skip-link:focus{transform:none}.section-head{gap:var(--space-6);margin-bottom:var(--space-7);grid-template-columns:minmax(0,.8fr) minmax(0,2fr);align-items:start;display:grid}.section-head .label{padding-top:.6rem}.section-head h2{font-family:var(--font-display);letter-spacing:-.04em;font-weight:500}.section-head h2+p{max-width:60ch;margin-top:var(--space-3)}.button{justify-content:center;align-items:center;gap:var(--space-2);min-height:44px;padding:var(--space-2) var(--space-5);border:1px solid var(--color-rule-strong);background:var(--color-surface);color:var(--color-ink);font-size:var(--text-label);cursor:pointer;border-radius:7px;font-weight:650;line-height:1.3;text-decoration:none;display:inline-flex}.button.primary{border-color:var(--color-display);color:#fff;background:linear-gradient(120deg,#07575a,#052f32)}.button.primary:hover{color:#fff;background:#07575a}.button.secondary:hover{background:var(--color-mist)}.button.ghost{color:var(--color-accent-ink);text-underline-offset:.2em;background:0 0;border-color:#0000;text-decoration:underline}.button.ghost:hover{color:var(--color-ink)}.text-link{align-items:center;gap:var(--space-2);min-height:44px;font-size:var(--text-label);font-weight:650;display:inline-flex}.brand{color:var(--color-ink);font-family:var(--font-display);letter-spacing:-.04em;white-space:nowrap;align-items:center;gap:.75rem;font-size:clamp(1.35rem,2vw,1.7rem);line-height:1;display:inline-flex}.brand strong{font-weight:700}.brand-mark{color:var(--color-accent-ink);flex-shrink:0}.brand-mark .mark-reading{fill:#16978f}.site-header{z-index:5;backdrop-filter:blur(10px);background:#f8fbfae6;border-bottom:1px solid #7e9d9c45;position:relative}.header-inner{grid-template-columns:auto 1fr auto;align-items:center;gap:clamp(1.5rem,3vw,4rem);min-height:88px;display:grid}body:has(.home-hero) .site-header{backdrop-filter:none;background:0 0;border-bottom-color:#0000}.header-inner>a:first-child{align-items:center;min-height:44px;text-decoration:none;display:inline-flex}.site-nav{justify-content:center;align-items:center;gap:clamp(1.2rem,2.8vw,3rem);display:flex}.site-nav a{min-height:44px;color:var(--color-ink-soft);font-size:var(--text-label);border-bottom:2px solid #0000;align-items:center;text-decoration:none;display:inline-flex}.site-nav a:hover,.site-nav a[aria-current]{color:var(--color-ink)}.site-nav a[aria-current]{border-bottom-color:var(--color-ink)}.header-cta{justify-content:space-between;align-items:center;gap:var(--space-4);background:var(--color-display);color:#fff;min-height:44px;font-size:var(--text-label);white-space:nowrap;border-radius:10px;padding:.55rem 1.25rem;font-weight:650;text-decoration:none;display:inline-flex;box-shadow:0 6px 16px #0631331f}.header-cta:hover{color:#fff;background:#07575a}.header-cta span{font-size:1.25rem;line-height:1}.breadcrumbs{align-items:center;gap:var(--space-2);font-size:var(--text-small);color:var(--color-muted);flex-wrap:wrap;display:flex}.breadcrumbs a{min-height:44px;color:var(--color-muted);align-items:center;display:inline-flex}.page-head{margin-bottom:var(--space-6);padding:var(--space-5) clamp(1.5rem, 3vw, 3rem) var(--space-7);border:1px solid var(--color-rule);background:linear-gradient(95deg,#f7faf9f7 0%,#f7faf9db 45%,#f7faf980 100%),url(/images/hero/bg.webp) 50% 70%/cover no-repeat;border-radius:0 0 16px 16px}.page-head h1{max-width:21ch;margin-top:var(--space-4);font-family:var(--font-display);letter-spacing:-.045em;font-weight:500}.page-head .lead{margin-top:var(--space-4)}.prose{max-width:var(--measure);counter-reset:section}.prose>h2{counter-increment:section;margin-top:var(--space-7);padding-top:var(--space-5);border-top:1px solid var(--color-rule);font-size:1.65rem}.prose>h2:before{content:counter(section, decimal-leading-zero);margin-bottom:var(--space-2);font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.1em;color:var(--color-accent-ink);display:block}.prose>h2:first-child{margin-top:0}.prose>h3{margin-top:var(--space-6)}.prose>p,.prose>dl{margin-top:var(--space-4)}.prose a{overflow-wrap:anywhere}.prose>h2{font-family:var(--font-display);letter-spacing:-.03em;font-weight:500}@media (width>=64.01rem){.content-grid .prose{grid-template-columns:15rem minmax(0,44rem);max-width:none;display:grid}.content-grid .prose>:not(h2){padding-left:var(--space-7);grid-column:2}.content-grid .prose>h2{margin-top:var(--space-7);grid-column:1}.content-grid .prose>h2+*{margin-top:var(--space-7);padding-top:var(--space-5);border-top:1px solid var(--color-rule)}.content-grid .prose>h2:first-child,.content-grid .prose>h2:first-child+*{margin-top:0}.content-grid .prose>h2+.methodology-formulas{display:grid}}.notice{padding:var(--space-3) var(--space-4);border-left:3px solid var(--color-accent);background:var(--color-notice);color:var(--color-ink);font-size:var(--text-label)}.site-footer{margin-top:var(--space-8);color:#d8eae7;background:linear-gradient(#0b3336 0%,#082a2d 100%)}.footer-grid{gap:var(--space-6);padding-block:var(--space-7);grid-template-columns:1.6fr repeat(3,minmax(0,1fr));display:grid}.site-footer :is(.brand,a,p,h2){color:inherit}.site-footer .brand-mark{color:#b5ddd5}.site-footer .brand-mark .mark-reading{fill:#5bc2b8}.footer-brand>a{align-items:center;min-height:44px;display:inline-flex}.footer-brand p{max-width:35ch;margin-top:var(--space-2);font-size:var(--text-label)}.footer-brand .footer-tagline{color:#fff;font-weight:700}.footer-grid h2{font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.1em;text-transform:uppercase;color:#b5ddd5;font-weight:600}.footer-grid ul{margin:var(--space-3) 0 0;padding:0;list-style:none}.footer-grid li a{min-height:34px;font-size:var(--text-label);color:#cfe3df;align-items:center;text-decoration:none;display:inline-flex}.footer-grid li a:hover{color:#fff;text-underline-offset:.2em;text-decoration:underline}.footer-grid h2{padding-bottom:var(--space-2);border-bottom:1px solid #285356}.footer-base{justify-content:space-between;gap:var(--space-3);padding-block:var(--space-3) var(--space-4);font-size:var(--text-small);color:#c1d6d2;border-top:1px solid #3f6768;flex-wrap:wrap;display:flex}@media (width<=64rem){.header-inner{grid-template-columns:auto 1fr}.header-cta{display:none}.footer-grid{grid-template-columns:repeat(3,1fr)}.footer-brand{grid-column:1/-1}}@media (width<=48rem){.container{width:calc(100% - 2 * var(--space-4))}.section{padding-block:var(--space-7)}.section-head{gap:var(--space-2);margin-bottom:var(--space-5);grid-template-columns:1fr}.page-head{padding:var(--space-3) var(--space-4) var(--space-6)}.footer-grid{gap:var(--space-5);padding-block:var(--space-6);grid-template-columns:1fr 1fr}}@media (width<=40rem){.header-inner{padding-top:var(--space-2);flex-wrap:wrap;gap:0;display:flex}.site-nav{justify-content:space-between;gap:var(--space-2);border-top:1px solid var(--color-rule);width:100%}}@media (prefers-reduced-motion:no-preference){a,.button{transition:color .12s,background-color .12s,border-color .12s}}.calculator{background:#fffffff7;border:1px solid #b6c8c78c;border-radius:18px;position:relative;overflow:hidden;box-shadow:0 24px 70px #15373921,0 2px 6px #1537390a}.calculator>.notice{margin:var(--space-4) var(--space-5) 0}.calc-body{grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);display:grid}.calc-inputs,.calc-results{min-width:0;padding:var(--space-5) 1.75rem var(--space-6)}.calc-inputs{background:#ffffffb8}.calc-results{border-left:1px solid var(--color-rule)}.calc-step{min-height:3.65rem;color:var(--color-ink);align-items:center;gap:.8rem;margin:0;padding-bottom:.9rem;display:flex}.calc-step>span:first-child{color:#fff;width:2.5rem;height:2.5rem;font-family:var(--font-mono);letter-spacing:.03em;background:linear-gradient(145deg,#074d50,#042a2d);border-radius:9px;flex:0 0 2.5rem;place-items:center;font-size:.72rem;display:grid}.calc-step-copy strong{letter-spacing:-.02em;font-size:1.08rem;font-weight:700;line-height:1.25;display:block}.calc-step-copy small{color:var(--color-muted);font-size:var(--text-small);letter-spacing:0;margin-top:.2rem;font-weight:400;line-height:1.35;display:block}.calc-inputs fieldset,.calc-inputs legend{width:100%}.calc-section-head{justify-content:space-between;align-items:center;gap:var(--space-3);display:flex}.calc-local{border:1px solid var(--color-rule);background:var(--color-pale);color:var(--color-ink-soft);white-space:nowrap;border-radius:999px;align-items:center;gap:.45rem;padding:.35rem .6rem;font-size:.7rem;line-height:1.25;display:inline-flex}.calc-local span{background:var(--color-accent);border-radius:50%;width:.42rem;height:.42rem;box-shadow:0 0 0 2px #d4ece8}.calc-status{margin:var(--space-3) 0;color:var(--color-muted);font-size:var(--text-small)}.calc-fields{gap:1.35rem var(--space-5);margin-top:var(--space-4);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.field{min-width:0}.field>label{color:var(--color-ink);font-size:var(--text-label);margin-bottom:.35rem;font-weight:700;display:block}.field input,.field select,.clipboard-fallback textarea{width:100%;min-width:0;padding:.55rem var(--space-3);border:1px solid var(--color-rule-strong);background:var(--color-field);color:var(--color-ink);border-radius:6px}.field input{font-variant-numeric:tabular-nums;font-size:1rem}.field input:focus,.field select:focus{background:#fff}.input-group{border:1px solid var(--color-rule-strong);background:var(--color-field);border-radius:6px;display:flex}.input-group:focus-within{border-color:var(--color-accent);box-shadow:0 0 0 3px #087b7521}.input-group:has([aria-invalid=true]){border-color:var(--color-danger)}.input-group input,.input-group select{background:0 0;border:0;border-radius:0}.input-group input{flex:auto}.input-group select,.input-unit{border-left:1px solid var(--color-rule);background:var(--color-mist);border-radius:0 5px 5px 0;flex:0 0 5.25rem}.input-unit{color:var(--color-ink-soft);font-family:var(--font-mono);font-size:var(--text-small);place-items:center;display:grid}.field select{appearance:none;background-image:linear-gradient(45deg, transparent 50%, var(--color-ink-soft) 50%), linear-gradient(135deg, var(--color-ink-soft) 50%, transparent 50%);background-position:calc(100% - 1.1rem) 52%,calc(100% - .8rem) 52%;background-repeat:no-repeat;background-size:.3rem .3rem;padding-right:2.25rem}.input-group select{background-position:calc(100% - 1rem) 52%,calc(100% - .7rem) 52%;padding-right:1.9rem}.field>select{border-color:var(--color-rule-strong);border-radius:8px;font-weight:550}.field>select:has(option[value=""]:checked){color:var(--color-muted);font-weight:400}.field>select:hover{border-color:var(--color-accent)}.field>select:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px #087b7521}.field .hint{margin-top:.35rem}.field-error{margin-top:var(--space-1);color:var(--color-danger);font-size:var(--text-small);font-weight:700;display:block}.field-error:empty{display:none}.field [aria-invalid=true]{box-shadow:inset 0 0 0 1px var(--color-danger)}.calc-actions{align-items:center;gap:var(--space-3) var(--space-5);grid-template-columns:minmax(10rem,17.5rem) auto auto;margin-top:2.4rem;display:grid}.calc-actions .primary{min-height:58px;padding-inline:var(--space-5);border-radius:8px;justify-content:space-between;font-size:1.0625rem}.calc-actions .primary span{font-size:1.3em}.calc-actions .ghost{white-space:nowrap;padding-inline:.2rem;font-weight:600}.readout{gap:.25rem var(--space-5);min-height:150px;padding:var(--space-5);color:var(--color-display-text);background:linear-gradient(115deg,#07565a,#052f32);border-radius:9px;grid-template-rows:auto 1fr auto;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);display:grid}.readout:not(:has(.scale-visual:not([hidden]))){grid-template-columns:1fr}.readout-label{color:#d3e8e4;font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.08em;text-transform:uppercase;grid-area:1/1;font-weight:700}.readout-value{color:#fff;font-size:var(--text-readout);letter-spacing:-.055em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;grid-area:2/1;align-self:center;font-weight:650;line-height:1}.readout-unit{letter-spacing:0;margin-left:.06em;font-size:.38em;font-weight:500}.readout-origin{color:var(--color-display-muted);font-size:var(--text-small);grid-area:3/1}.readout-empty{background:linear-gradient(125deg,#edf5f3,#f9fbfa);border:1px solid #cedcda;min-height:168px}.readout-empty .readout-label{color:var(--color-accent-ink)}.readout-empty .readout-value{color:#8ca9a5;font-size:clamp(2.8rem,4vw,3.5rem)}.readout-empty p{max-width:40ch;color:var(--color-ink-soft);font-size:var(--text-small);grid-column:1}.empty-path{justify-content:space-between;gap:var(--space-2);margin-top:var(--space-3);padding-top:var(--space-2);color:var(--color-muted);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;border-top:1px solid #cfddda;font-size:.67rem;display:flex}.empty-path span:not(:last-child):after{content:"→";color:var(--color-accent-ink);margin-left:.4rem}.scale-visual{min-width:0;padding-left:var(--space-4);color:#c6dfdc;border-left:1px solid #d9f1ec3b;grid-area:1/2/span 3;align-self:center}.scale-visual svg{width:100%;height:auto;display:block}.scale-ticks{stroke:currentColor;stroke-width:1px;fill:none}.scale-visual text{fill:currentColor;font-family:var(--font-mono);font-size:9px}.scale-marker{fill:#77ddd0;stroke:#063e41;stroke-width:2px}.scale-visual figcaption{color:#d0e6e1;margin-top:.25rem;font-size:.68rem;line-height:1.4}.result-list{gap:var(--space-2);margin-top:var(--space-2);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.result-list>div{align-items:end;column-gap:var(--space-3);border:1px solid var(--color-rule);background:#fbfcfc;border-radius:8px;grid-template-columns:minmax(0,1fr) auto;min-width:0;min-height:4.6rem;padding:.75rem 1rem;display:grid}.result-list dt{grid-column:1/-1}.result-list dd.result-unit{color:var(--color-muted);font-size:var(--text-small);margin:0;font-weight:400}.result-list>div:last-child:nth-child(odd){grid-column:1/-1}.result-list dt{color:var(--color-ink-soft);font-size:var(--text-small)}.result-list dd{color:var(--color-ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin-top:.15rem;font-size:1.24rem;font-weight:700}[data-results]>.hint,[data-results]>.notice{margin-top:var(--space-2)}.result-actions{align-items:center;gap:var(--space-2) var(--space-3);margin-top:var(--space-4);flex-wrap:wrap;display:flex}.result-rounding{flex:14rem;max-width:22rem;margin-left:auto;font-size:.72rem;line-height:1.45}.result-actions .button{padding-inline:var(--space-4)}.clipboard-fallback{margin-top:var(--space-3);font-size:var(--text-label);display:block}.clipboard-fallback textarea{margin-top:var(--space-2);resize:vertical;font-family:var(--font-mono);font-size:var(--text-small)}.action-status{margin-top:var(--space-2);color:var(--color-ink);font-size:var(--text-small)}.action-status:empty{display:none}.inspector{counter-reset:step}.inspector-head{justify-content:space-between;align-items:center;gap:var(--space-3) var(--space-5);margin-bottom:var(--space-5);flex-wrap:wrap;display:flex}.inspector-head .calc-step{min-height:0;padding:0;font-size:.85rem}.inspector-head .hint{max-width:55ch}.inspector-steps{margin:0;padding:0;list-style:none}.inspector-steps li{counter-increment:step;min-width:0}.step-label{color:var(--color-ink);font-size:var(--text-small);font-weight:700;display:block}.step-equation{margin-top:var(--space-2);color:var(--color-ink-soft);font-family:var(--font-mono);overflow-wrap:anywhere;font-size:.88rem;line-height:1.5}.inspector-live{padding:var(--space-5);border-top:1px solid var(--color-rule);background:#f8fbfa}.inspector-live .inspector-steps{background:#fff;border:1px solid #c7d8d5;border-radius:8px;grid-template-columns:repeat(auto-fit,minmax(min(100%,13rem),1fr));display:grid;overflow:hidden}.inspector-live .inspector-steps li{min-height:8.25rem;padding:var(--space-4);border-right:1px solid var(--color-rule);position:relative}.inspector-live .inspector-steps li:last-child{border-right:0}.inspector-live .inspector-steps li:before{content:counter(step, decimal-leading-zero);width:1.75rem;height:1.75rem;margin-bottom:var(--space-3);background:var(--color-accent);color:#fff;font-family:var(--font-mono);font-size:var(--text-micro);border-radius:50%;place-items:center;font-weight:700;display:grid}.inspector-live .inspector-steps li:not(:last-child):after{content:"→";z-index:1;width:1.1rem;height:1.1rem;color:var(--color-accent-ink);background:#fff;border:1px solid #a7c9bf;border-radius:50%;place-items:center;font-size:.7rem;display:grid;position:absolute;top:1.2rem;right:-.55rem}.inspector-example .inspector-head{display:block}.inspector-example .inspector-head .hint{margin-top:var(--space-2)}.inspector-example .inspector-steps{border-top:1px solid #c4d5d1}.inspector-example .inspector-steps li{gap:0 var(--space-3);padding:var(--space-3) 0;border-bottom:1px solid #c4d5d1;grid-template-columns:2rem minmax(0,1fr);display:grid}.inspector-example .inspector-steps li:before{content:counter(step, decimal-leading-zero);color:var(--color-accent-ink);font-family:var(--font-mono);font-size:var(--text-micro);grid-row:span 2;font-weight:700}.inspector-example .step-equation{grid-column:2;margin-top:.15rem}.calc-notice{margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid var(--color-rule);color:var(--color-muted);font-size:var(--text-small);line-height:1.55}.calc-notice a{color:var(--color-ink-soft);text-decoration-color:var(--color-rule-strong)}.calc-notice a:hover{color:var(--color-ink)}@media (width<=64rem){.calc-body{grid-template-columns:minmax(0,1fr)}.calc-results{border-left:0;border-top:1px solid var(--color-rule)}.inspector-live .inspector-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.inspector-live .inspector-steps li{border-bottom:1px solid var(--color-rule)}.inspector-live .inspector-steps li:nth-child(2n){border-right:0}.inspector-live .inspector-steps li:nth-child(2n):after{display:none}}@media (width<=40rem){.calc-inputs,.calc-results,.inspector-live{padding:var(--space-4)}.calculator>.notice{margin-inline:var(--space-4)}.calc-fields{gap:var(--space-4);grid-template-columns:minmax(0,1fr)}.calc-actions{margin-top:var(--space-5);grid-template-columns:auto 1fr;justify-items:start}.calc-actions .primary{grid-column:1/-1;width:100%}.calc-section-head{flex-wrap:wrap}.calc-local{margin-bottom:var(--space-2)}.readout{grid-template-columns:minmax(0,1fr)}.scale-visual{padding:var(--space-2) 0 0;border-top:1px solid #d9f1ec3b;border-left:0;grid-area:auto/1}.readout-origin{grid-row:auto}.result-list>div{grid-template-columns:minmax(0,1fr);align-content:start;align-items:start;row-gap:.1rem;padding:.65rem .8rem}.result-list dd.result-unit{margin-top:0}.result-list dd{font-size:1.15rem}.result-rounding{flex-basis:100%;max-width:none;margin-left:0}.inspector-live .inspector-steps{grid-template-columns:minmax(0,1fr)}.inspector-live .inspector-steps li{border-right:0;min-height:0}.inspector-live .inspector-steps li:not(:last-child):after{content:"↓";inset:auto auto -.55rem 1.2rem}.inspector-live .inspector-steps li:nth-child(2n):after{display:grid}}@media (prefers-reduced-motion:no-preference){.input-group{transition:border-color .12s,box-shadow .12s}[data-results]:not([hidden]) .readout{animation:.16s ease-out readout-in}@keyframes readout-in{0%{opacity:.55;transform:translateY(3px)}}}.home-hero{isolation:isolate;background:#eef3f2;min-height:560px;margin-top:-88px;padding-top:88px;position:relative;overflow:hidden}.home-hero:before{content:"";z-index:0;background:linear-gradient(90deg, #f7faf9e6 0%, #f7faf9b3 32%, #f7faf900 54%), linear-gradient(180deg, #f7faf980 0, #f7faf900 20%, #f7faf900 80%, var(--color-paper) 100%);position:absolute;inset:0}.hero-art{z-index:-1;position:absolute;inset:0;overflow:hidden}.hero-stage{--stage-w:clamp(1180px, 100vw, 1536px);left:50%;top:calc(300px - var(--stage-w) * .344);width:var(--stage-w);aspect-ratio:16/9;position:absolute;transform:translate(-50%)}@media (width>=96.01rem){.hero-stage{mask-image:linear-gradient(90deg,#0000,#000 10% 90%,#0000)}}.hero-stage img{width:100%;max-width:none;height:100%;position:absolute;inset:0}.hero-stage .layer-plant{top:30%;left:18%}.hero-stage .layer-panel{width:51.6%;height:auto;inset:26.4% auto auto 50.1%}.hero-stage .layer-vial{width:46.9%;height:auto;inset:34.6% auto auto 40.75%}.hero-inner{z-index:1;min-height:430px;padding-block:var(--space-4) 7.2rem;grid-template-columns:minmax(0,1fr);align-items:center;display:grid;position:relative}.hero-copy{z-index:1;position:relative}.hero-copy .label{color:#36575d}.hero-copy h1{margin-top:var(--space-4);color:#0b1d24;font-family:var(--font-display);font-size:var(--text-display);letter-spacing:-.052em;font-weight:500;line-height:.98}.hero-copy h1 em{color:var(--color-accent-ink);font-style:normal}.hero-copy .lead{max-width:30rem;margin-top:var(--space-5);color:#2d4b54;font-size:1.1875rem;line-height:1.55}.facts{gap:var(--space-4) var(--space-6);margin:var(--space-5) 0 0;flex-wrap:wrap;padding:0;list-style:none;display:flex}.facts li{align-items:center;gap:var(--space-3);color:var(--color-ink-soft);font-size:var(--text-label);line-height:1.35;display:flex}.facts svg{width:1.75rem;height:1.75rem;color:var(--color-ink);flex:none}.home-calculator{z-index:2;margin-top:-5.6rem;position:relative}.value-rail{padding-block:var(--space-6) var(--space-7);grid-template-columns:repeat(3,minmax(0,1fr));gap:0;display:grid}.value-rail a{align-items:center;gap:var(--space-4);min-width:0;padding-inline:var(--space-6);color:var(--color-ink);text-decoration:none;display:flex}.value-rail a:first-child{padding-left:0}.value-rail a+a{border-left:1px solid var(--color-rule)}.value-rail a:hover strong{color:var(--color-accent-ink);text-underline-offset:.2em;text-decoration:underline}.value-icon{border:1px solid var(--color-rule);width:3rem;height:3rem;color:var(--color-accent-ink);background:#edf4f3;border-radius:50%;flex:0 0 3rem;place-items:center;display:grid}.value-icon svg{stroke:currentColor;stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round;width:1.35rem;height:1.35rem}.value-rail strong{font-size:var(--text-label);display:block}.value-rail small{color:var(--color-muted);font-size:var(--text-small);margin-top:.2rem;line-height:1.35;display:block}.worked-band{padding-block:var(--space-8);border-top:1px solid var(--color-rule);background:#f9fbfa}.worked{gap:var(--space-7);grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:start;display:grid}.worked h2{max-width:14ch;margin-top:var(--space-4);font-family:var(--font-display);font-weight:500}.worked-copy>p:not(.label){max-width:48ch;margin-top:var(--space-4)}.worked-inputs{gap:var(--space-3);margin:var(--space-5) 0 var(--space-4);padding-block:var(--space-3);border-block:1px solid var(--color-rule);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.worked-inputs>div{min-width:0}.worked-inputs dt{color:var(--color-muted);font-size:var(--text-small)}.worked-inputs dd{color:var(--color-ink);font-variant-numeric:tabular-nums;font-weight:700}.worked .readout{grid-template-columns:1fr;min-height:128px}.worked .readout-value{font-size:clamp(2.4rem,4vw,3.6rem)}.worked .inspector{padding-top:var(--space-2)}.ecosystem{padding-block:var(--space-8)}.tool-library{gap:var(--space-7);display:grid}.tool-cluster{min-width:0}.cluster-heading{align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);display:flex}.cluster-heading:after{content:"";background:var(--color-rule-strong);flex:1;height:1px}.cluster-mark{border:2px solid var(--color-accent);border-radius:50%;width:.7rem;height:.7rem}.cluster-count{color:var(--color-muted);font-family:var(--font-mono);font-size:var(--text-micro);white-space:nowrap;order:3}.tool-index{gap:var(--space-4);grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.tool-index li{gap:var(--space-3);min-width:0;min-height:205px;padding:var(--space-5);border:1px solid var(--color-rule);background:var(--color-surface);border-radius:14px;grid-template-columns:2.5rem minmax(0,1fr) 1.5rem;align-content:start;display:grid;position:relative;box-shadow:0 5px 16px #123e400b}.tool-index li:hover,.tool-index li:focus-within{border-color:#8cb7b2;box-shadow:0 10px 24px #123e4018}.tool-index-no{color:var(--color-accent-ink);font-family:var(--font-mono);font-size:var(--text-small);padding-top:.2rem;font-weight:700}.tool-index-main{min-width:0}.tool-index-main :is(h2,h3){margin-top:var(--space-2);font-size:clamp(1.2rem,1.7vw,1.45rem)}.tool-index-main a{color:var(--color-ink);text-decoration:none}.tool-index-main a:after{content:"";position:absolute;inset:0}.tool-index-main p{margin-top:var(--space-2);font-size:var(--text-label)}.tool-index-spec{gap:var(--space-3);margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid var(--color-rule);font-size:var(--text-small);grid-column:2/3;grid-template-columns:repeat(2,minmax(0,1fr));align-self:end;display:grid}.tool-index-spec dd{margin-top:var(--space-1);color:var(--color-ink-soft)}.tool-index-arrow{border:1px solid var(--color-rule);width:2rem;height:2rem;color:var(--color-accent-ink);background:#edf4f3;border-radius:50%;grid-area:1/3;align-self:start;place-items:center;font-size:1rem;display:grid}.tool-index li:hover .tool-index-arrow,.tool-index li:focus-within .tool-index-arrow{border-color:var(--color-accent-ink);background:var(--color-accent-ink);color:#fff}.tool-cluster:first-child .tool-index{grid-template-columns:repeat(3,minmax(0,1fr))}.tool-cluster:first-child .tool-index li:not(:first-child) .tool-index-spec{grid-template-columns:minmax(0,1fr)}.tool-cluster:first-child .tool-index li:first-child{background:var(--color-display);border-color:#1e5b5c;border-radius:14px;grid-column:1/-1;grid-template-columns:3rem minmax(0,1.1fr) minmax(0,.9fr) 2rem;min-height:170px}.tool-cluster:first-child .tool-index li:first-child :is(.tool-index-no,.label){color:var(--color-accent-light)}.tool-cluster:first-child .tool-index li:first-child .tool-index-arrow{color:#fff;background:#ffffff14;border-color:#3c7677;grid-column:4}.tool-cluster:first-child .tool-index li:first-child :is(h2,h3,h2 a,h3 a){color:#fff;font-size:clamp(1.5rem,2vw,2rem)}.tool-cluster:first-child .tool-index li:first-child :is(p,dd){color:#d4e9e6}.tool-cluster:first-child .tool-index li:first-child .tool-index-spec{border:0;grid-area:1/3;align-self:center;margin:0;padding:0}.research-horizon{align-items:center;gap:var(--space-4);margin-top:var(--space-6);padding:var(--space-4) 0;border-block:1px solid var(--color-rule-strong);display:flex}.research-horizon .horizon-symbol{color:var(--color-accent-ink);font-size:1.35rem}.research-horizon p+p{margin-top:var(--space-1)}.reference-band{background:#edf3f2}.reference-band .section{padding-block:var(--space-8)}main:has(.reference-band)+.site-footer{margin-top:0}.reference-grid{gap:var(--space-7);grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);display:grid}.reference-grid h3{margin-bottom:var(--space-4);font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent-ink);font-weight:700}.reference-grid>div{padding:var(--space-5) var(--space-5) var(--space-4);border:1px solid var(--color-rule);background:var(--color-surface);border-radius:14px;box-shadow:0 5px 16px #123e400a}.definitions{border-top:1px solid var(--color-rule-strong)}.definitions>div{gap:var(--space-4);padding:var(--space-3) 0;border-bottom:1px solid var(--color-rule-strong);grid-template-columns:minmax(0,10rem) minmax(0,1fr);display:grid}.definitions dt{color:var(--color-ink);font-weight:700}.definitions dd{color:var(--color-ink-soft)}.principles{border-top:1px solid var(--color-rule-strong);counter-reset:principle;padding:0;list-style:none}.principles li{counter-increment:principle;padding:var(--space-3) 0 var(--space-3) 2.25rem;border-bottom:1px solid var(--color-rule-strong);color:var(--color-ink-soft);position:relative}.principles li:before{content:counter(principle, decimal-leading-zero);left:0;top:var(--space-3);color:var(--color-accent-ink);font-family:var(--font-mono);font-weight:700;position:absolute}.principles strong{color:var(--color-ink)}.tool-head-grid{gap:var(--space-7);margin-top:var(--space-4);grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);align-items:end;display:grid}.tool-head-grid h1{margin-top:var(--space-3)}.glance{padding:var(--space-4);border:1px solid var(--color-rule);font-size:var(--text-label);background:#ffffffb8;border-radius:8px}.glance>div{gap:var(--space-3);padding-block:var(--space-2);grid-template-columns:6.5rem minmax(0,1fr);display:grid}.glance>div+div{border-top:1px solid var(--color-rule)}.glance dd{color:var(--color-ink)}.home-calc-link{margin-top:var(--space-2);text-align:right}@media (width>=48.01rem){.glance.provenance>div{grid-template-columns:9rem minmax(0,1fr)}}@media (width>=64.01rem){.content-grid .prose>dl.provenance{margin-left:var(--space-7);padding-left:var(--space-4)}}.tool-content{gap:var(--space-7);margin-top:var(--space-8);grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);align-items:start;display:grid}.formula-block{padding:var(--space-5);border-left:4px solid var(--color-accent);color:var(--color-ink);font-family:var(--font-mono);font-size:var(--text-label);background:#e9f2ef;border-radius:0 6px 6px 0}.faq{padding:var(--space-5);border:1px solid var(--color-rule);background:#fff;border-radius:9px}.faq h2,.related h2{margin-bottom:var(--space-3);font-size:1.5rem}.faq details{border-bottom:1px solid var(--color-rule)}.faq summary{min-height:44px;padding-block:var(--space-3);color:var(--color-ink);cursor:pointer;align-items:center;font-weight:700;display:flex}.faq details p{padding-bottom:var(--space-4)}.method-strip{justify-content:space-between;align-items:center;gap:var(--space-2) var(--space-5);margin-block:var(--space-7);padding:var(--space-5);background:#e9f2ef;border-radius:8px;flex-wrap:wrap;display:flex}.method-strip p{color:var(--color-ink-soft)}.method-strip strong{color:var(--color-ink)}.related{margin-top:var(--space-7)}.methodology-formulas{gap:var(--space-2);display:grid}.methodology-formulas>div{gap:var(--space-4);padding:var(--space-4);border-left:3px solid var(--color-accent);background:#eaf3f0;grid-template-columns:minmax(0,12rem) minmax(0,1fr);display:grid}.methodology-formulas dt{font-weight:700}.methodology-formulas dd{color:var(--color-ink);font-family:var(--font-mono);font-size:var(--text-label);overflow-wrap:anywhere}.content-grid{gap:var(--space-7);grid-template-columns:minmax(0,1fr) minmax(12rem,17rem);align-items:start;display:grid}.content-aside{top:var(--space-5);padding:var(--space-5);border:1px solid var(--color-rule);background:#fff;border-radius:8px;position:sticky}.content-aside ul{margin:var(--space-2) 0 var(--space-3);padding:0;list-style:none}.content-aside li a{border-bottom:1px solid var(--color-rule);min-height:40px;font-size:var(--text-label);align-items:center;text-decoration:none;display:flex}.content-aside li a[aria-current]{padding-left:var(--space-3);box-shadow:inset 3px 0 0 var(--color-accent);font-weight:700}.tool-library.compact,.tool-library.compact .tool-index{display:block}.tool-library.compact .tool-index li,.tool-library.compact .tool-index li:first-child{min-height:0;padding:var(--space-3) var(--space-4);box-shadow:none;background:0 0;border-width:0 0 1px;border-radius:0;grid-template-columns:2.5rem minmax(0,1fr) 1.5rem;display:grid}.tool-library.compact .tool-index li:first-child :is(h2,h3,h2 a,h3 a){color:var(--color-ink);font-size:var(--text-h3)}.tool-library.compact .tool-index li:first-child :is(.tool-index-no,.tool-index-arrow,.label){color:var(--color-accent-ink)}.tool-library.compact .tool-index li:first-child{border-color:var(--color-rule)}.tool-library.compact .tool-index li:first-child .tool-index-arrow{border-color:var(--color-rule);color:var(--color-accent-ink);background:#edf4f3;grid-column:3}.tool-library.compact .tool-index-arrow{align-self:center}@media (width<=68.75rem){.hero-stage .layer-panel{display:none}}@media (width<=63.99rem){.hero-stage :is(.layer-vial,.layer-plant){display:none}.home-hero:before{background:linear-gradient(#f7faf9e6 0%,#f7faf9d1 60%,#f7faf98c 100%)}}@media (width<=64rem){.worked,.reference-grid,.tool-head-grid,.tool-content,.content-grid{grid-template-columns:minmax(0,1fr)}.worked h2{max-width:20ch}.tool-cluster:first-child .tool-index{grid-template-columns:repeat(2,minmax(0,1fr))}.content-aside{position:static}.value-rail a{padding-inline:var(--space-4)}}@media (width<=48rem){.home-hero{min-height:0}.hero-stage{--stage-w:200vw;top:0;left:30%;mask-image:linear-gradient(#000 70%,#0000 100%)}.hero-stage :is(.layer-panel,.layer-vial,.layer-plant){display:none}.home-hero:before{background:linear-gradient(#f7faf9e6 0%,#f7faf9d1 60%,#f7faf98c 100%)}.hero-inner{min-height:0;padding-block:var(--space-6) 7rem;grid-template-columns:1fr}.home-calculator{margin-top:-5.5rem}.value-rail{gap:var(--space-3);grid-template-columns:1fr}.value-rail a{padding:0}.value-rail a+a{border:0}.worked-band{padding-block:var(--space-7)}.worked-inputs{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-index,.tool-cluster:first-child .tool-index{grid-template-columns:minmax(0,1fr)}.tool-index li{min-height:0}.tool-cluster:first-child .tool-index li:first-child{grid-column:auto;grid-template-columns:2.5rem minmax(0,1fr) 1.5rem}.tool-cluster:first-child .tool-index li:first-child .tool-index-arrow{grid-column:3}.tool-cluster:first-child .tool-index li:first-child .tool-index-spec{margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid #547c7c;grid-area:auto/2}.tool-index-spec{grid-template-columns:minmax(0,1fr)}.research-horizon{align-items:start}.definitions>div,.methodology-formulas>div,.glance>div{gap:var(--space-1);grid-template-columns:1fr}.tool-content{margin-top:var(--space-7)}}@media (width<=40rem){.home-hero{margin-top:0;padding-top:0}.hero-copy h1{font-size:clamp(2.85rem,10vw,4rem)}.hero-copy .lead{max-width:38ch}.facts{gap:var(--space-3)}.facts li{font-size:var(--text-small)}.facts svg{width:1.4rem;height:1.4rem}}.not-found-head{position:relative;overflow:hidden}.not-found-head>:not(.not-found-mark){z-index:1;position:relative}.not-found-actions{gap:var(--space-3);margin-top:var(--space-5);flex-wrap:wrap;display:flex}.not-found-mark{color:#08626017;font-family:var(--font-display);letter-spacing:-.06em;pointer-events:none;user-select:none;font-size:clamp(7rem,20vw,17rem);font-weight:500;line-height:1;position:absolute;bottom:-.14em;right:clamp(1rem,5vw,4rem)}.not-found-list{margin-bottom:var(--space-6);border:1px solid var(--color-rule);background:var(--color-surface);border-radius:14px;overflow:hidden;box-shadow:0 5px 16px #123e400a}.not-found-list .tool-library.compact .tool-index li:last-child{border-bottom:0}@media print{body{color:#000;background:#fff;font-size:10pt}.site-header,.site-footer,.skip-link,.breadcrumbs,.calc-actions,.result-actions,.clipboard-fallback,.readout-empty,.related,.method-strip,.tool-index,.faq,.content-aside,.hero-art,.home-calc-link,.value-rail{display:none}.container{width:100%}.calculator{border-color:#000}.calc-body{grid-template-columns:1fr 1fr}.calc-inputs,.calc-results,.calculator .inspector{padding:.5rem}.readout{color:#000;background:#fff;border:1px solid #000}.readout-label,.readout-value,.readout-origin,.scale-visual,.scale-visual figcaption{color:#000}.result-list>div,.inspector-live{background:#fff}.home-hero{background:#fff;min-height:0;margin:0;padding:0}.hero-inner{min-height:0;padding:0 0 1rem}.home-calculator{margin-top:0}.scale-marker{stroke:#fff}.inspector{break-inside:avoid;background:#fff}.field{margin-bottom:.4rem}.field .hint,.calc-results .hint{display:none}.page-head{background:0 0;border:0;padding-block:0 .5rem}}