:root{--brand:#ea6113;--brand-mid:#f88f22;--brand-gold:#fbb931;--brand-tint:#ffe3b3;--brand-gradient:linear-gradient(90deg,#ea6113,#f88f22 38%,#fbb931 70%,#ffe3b3);--on-brand:#1c1917;--page:#faf6ef;--surface:#fffcf7;--surface-alt:#f4ede3;--border:#ded2bf;--border-strong:#cdbfa6;--ink:#1c1917;--body:#44403c;--muted:#6b635c;--brand-text:#b53b0a;--result:#0f766e;--warn:#b45309;--focus:#2563eb;--shadow-menu:0 12px 32px rgba(28,25,23,0.12),0 2px 8px rgba(28,25,23,0.06);--font-sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;--font-mono:ui-monospace,"SFMono-Regular","Menlo","Consolas",monospace;--radius:10px;--radius-card:14px;--maxw:1180px;--maxw-prose:68ch;--ease-out:cubic-bezier(0.16,1,0.3,1);--dur-fast:140ms;--dur-base:220ms;--dur-enter:620ms}[data-theme=dark]{--page:#1c1917;--surface:#262220;--surface-alt:#302b27;--border:#443d37;--border-strong:#574d45;--ink:#faf6ef;--body:#e7dfd5;--muted:#b3a89c;--brand-text:#f88f22;--result:#2dd4bf;--warn:#fbb931;--focus:#7aa7ff;--shadow-menu:0 12px 32px rgba(0,0,0,0.5),0 2px 8px rgba(0,0,0,0.35);color-scheme:dark}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--page);transition:background-color var(--dur-base) var(--ease-out),color var(--dur-base) var(--ease-out);color:var(--body);font-family:var(--font-sans);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:700;margin:0 0 .5em;text-wrap:balance}h1{font-size:clamp(1.85rem,1.3rem + 2vw,2.5rem);letter-spacing:-.02em}h2{font-size:clamp(1.35rem,1.1rem + 1vw,1.7rem);letter-spacing:-.01em;margin-top:2.25rem}h3{font-size:1.15rem;margin-top:1.75rem}ol,p,ul{margin:0 0 1.1em}a{color:var(--brand-text);text-underline-offset:2px}a:hover{color:var(--ink)}:where(a,button,input,select,summary):focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}.prose{max-width:var(--maxw-prose)}table{width:100%;border-collapse:collapse;font-size:.94rem;margin:0 0 1.5rem}td,th{text-align:left;padding:9px 12px;border-bottom:1px solid var(--border)}th{color:var(--ink);font-weight:600;background:var(--surface-alt)}td:not(:first-child),th:not(:first-child){font-feature-settings:"tnum";font-variant-numeric:tabular-nums}code{font-family:var(--font-mono);font-size:.9em;background:var(--surface-alt);padding:1px 5px;border-radius:4px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}.skip-link{position:absolute;left:-9999px;top:0;z-index:100;background:var(--surface);color:var(--ink);padding:10px 16px;border-radius:var(--radius)}.skip-link:focus{left:12px;top:12px}.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;z-index:50}.site-header .container{max-width:1360px}.brand{text-decoration:none;justify-self:start}.logo{display:inline-flex;align-items:center;gap:9px}.logo-mark{border-radius:7px;flex:0 0 auto}.logo-word{font-size:1.12rem;letter-spacing:-.025em;color:var(--ink);white-space:nowrap}.logo-word strong{font-weight:700}.logo-word span{color:var(--brand-text);font-weight:400}.header-right{display:flex;align-items:center;gap:4px;justify-self:end;white-space:nowrap}.header-desktop>.brand,.header-desktop>.header-right{min-width:max-content}.header-link{font-size:.9rem;color:var(--body);text-decoration:none;padding:7px 11px;border-radius:var(--radius)}.header-link:hover{background:var(--surface-alt);color:var(--ink)}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--body);cursor:pointer;flex:0 0 auto}.icon-btn:hover{background:var(--surface-alt);color:var(--ink);border-color:var(--border-strong)}.mega{justify-self:center;position:relative;min-width:0}.mega-nav{display:flex;align-items:center;gap:2px}.mega-trigger{display:inline-flex;align-items:center;gap:5px;font:inherit;font-size:.92rem;color:var(--body);background:none;border:0;padding:8px 12px;border-radius:var(--radius);cursor:pointer;white-space:nowrap}.mega-trigger.is-open,.mega-trigger:hover{background:var(--surface-alt);color:var(--ink)}.chev{transition:transform var(--dur-fast) var(--ease-out);opacity:.6}.mega-trigger.is-open .chev{transform:rotate(180deg)}.mega-panel{position:absolute;top:100%;left:0;width:max-content;max-width:min(620px,calc(100vw - 24px));padding-top:8px;z-index:60}.mega-panel[hidden]{display:none}.mega-panel.is-open{animation:menu-in var(--dur-base) var(--ease-out) both}.mega-panel-inner{display:grid;grid-template-columns:230px minmax(0,1fr);grid-gap:16px;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-menu);padding:16px}.mega-hub{display:flex;flex-direction:column;gap:5px;text-decoration:none;background:var(--surface-alt);border-radius:var(--radius);padding:14px;border-top:3px solid var(--brand);transition:box-shadow var(--dur-base) var(--ease-out)}.mega-hub:hover{box-shadow:inset 0 0 0 1px var(--brand)}.mega-hub-title{font-weight:600;color:var(--ink);font-size:.98rem;line-height:1.3}.mega-hub-lede{font-size:.84rem;color:var(--muted);line-height:1.45}.mega-hub-cta{font-size:.84rem;color:var(--brand-text);font-weight:600;margin-top:auto;padding-top:8px}.mega-tools{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));grid-gap:2px;gap:2px;align-content:start}.mega-tools a{display:block;text-decoration:none;padding:9px 11px;border-radius:var(--radius)}.mega-tools a:hover{background:var(--surface-alt)}.mega-tool-title{display:block;font-size:.92rem;color:var(--ink);font-weight:500}.mega-tool-blurb{display:block;font-size:.8rem;color:var(--muted);line-height:1.4}.mega-panel-inner.is-empty{grid-template-columns:230px auto}.mega-empty{font-size:.85rem;color:var(--muted);margin:0;align-self:center;white-space:nowrap;padding-right:8px}.search-overlay{position:fixed;inset:0;z-index:90;background:rgba(28,25,23,.45);display:flex;justify-content:center;padding:clamp(1rem,8vh,6rem) 1rem 1rem;animation:enter-fade var(--dur-base) var(--ease-out) both}.search-panel{width:min(620px,100%);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-menu);overflow:hidden;align-self:start;max-height:80vh;display:flex;flex-direction:column;animation:menu-in var(--dur-base) var(--ease-out) both}.search-field{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--border);color:var(--muted)}.search-input{flex:1 1;min-width:0;border:0;background:transparent;font:inherit;font-size:1rem;color:var(--ink)}.search-input:focus{outline:none}.search-close{padding:4px 9px;font-size:.78rem}.search-results{list-style:none;margin:0;padding:6px;overflow-y:auto}.search-results a{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:2px 10px;gap:2px 10px;text-decoration:none;padding:10px 12px;border-radius:var(--radius)}.search-results a:hover{background:var(--surface-alt)}.search-result-title{color:var(--ink);font-weight:500;font-size:.95rem}.search-result-blurb{color:var(--muted);font-size:.82rem;grid-column:1}.search-kind{grid-row:1/span 2;grid-column:2;align-self:center;font-size:.72rem;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:2px 9px;white-space:nowrap}.search-empty{padding:1.5rem;color:var(--muted);font-size:.92rem;margin:0}.drawer{position:fixed;inset:62px 0 0;z-index:80;background:var(--page);overflow-y:auto;animation:enter-fade var(--dur-base) var(--ease-out) both}.drawer-inner{padding:1.25rem clamp(1rem,4vw,2rem) 3rem}.drawer-label{font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;margin:1.25rem 0 .5rem}.drawer-label:first-child{margin-top:0}.drawer-list{list-style:none;margin:0;padding:0}.drawer-list a{display:block;text-decoration:none;padding:12px 0;border-bottom:1px solid var(--border)}.drawer-title{display:block;color:var(--ink);font-size:1.02rem;font-weight:500}.drawer-blurb{display:block;color:var(--muted);font-size:.85rem;line-height:1.45}.drawer-cta{display:block;text-align:center;margin-top:1.75rem;padding:13px;border-radius:var(--radius);background:var(--brand-gradient);color:var(--on-brand);font-weight:600;text-decoration:none}.header-desktop{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;grid-gap:1rem;gap:1rem;min-height:66px;position:relative}.header-desktop>*{min-width:0}.header-mobile{display:none}@media (max-width:1240px){.header-desktop{display:none}.header-mobile{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:62px;grid-gap:8px;gap:8px}.header-mobile .brand{justify-self:center}.header-mobile-left{justify-self:start}.header-mobile-right{justify-self:end;display:flex;align-items:center;gap:6px}.logo-word{font-size:1.02rem}}@media (min-width:1241px) and (max-width:1440px){.mega-trigger{padding:8px;font-size:.88rem}.header-link{padding:7px 8px}}@media (max-width:380px){.logo-word{display:none}}.site-footer{background:var(--surface);border-top:1px solid var(--border);margin-top:4rem;padding:2rem 0 2.5rem;font-size:.9rem}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:1.5rem;gap:1.5rem}.footer-grid h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;font-weight:600;margin-bottom:.5rem}.footer-grid h4 a{color:var(--muted);text-decoration:none}.footer-grid h4 a:hover{color:var(--brand-text)}.footer-grid .muted{color:var(--muted)}.footer-grid ul{list-style:none;padding:0;margin:0}.footer-grid li{margin-bottom:3px}.footer-grid a{color:var(--body);text-decoration:none}.footer-grid a:hover{color:var(--brand-text)}.footer-legal{border-top:1px solid var(--border);margin-top:1.75rem;padding-top:1.25rem;color:var(--muted);font-size:.85rem}.breadcrumbs{font-size:.86rem;color:var(--muted);padding:1rem 0 .25rem}.breadcrumbs a{color:var(--muted);text-decoration:none}.breadcrumbs a:hover{color:var(--brand-text)}.breadcrumbs span{margin:0 6px}.crumb-current{color:var(--body)}.page-head{padding:.5rem 0 1.5rem}.page-lede{font-size:1.08rem;color:var(--body);max-width:60ch;margin:0}.hero{padding:clamp(2.5rem,6vw,4rem) 0 1rem;max-width:62ch}.hero h1{font-size:clamp(2rem,1.3rem + 3vw,3.1rem)}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:1.5rem}.hero-rule{height:4px;border-radius:2px;background:var(--brand-gradient);margin-top:2.25rem;max-width:220px}.card-meta{margin-top:8px!important;color:var(--brand-text)!important;font-weight:600}.page-note{font-size:.86rem;color:var(--muted);border-top:1px solid var(--border);padding-top:1.25rem;margin-top:2.5rem}.calc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:clamp(1rem,3vw,1.5rem);margin-bottom:2rem}.calc-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-gap:clamp(1rem,3vw,1.75rem);gap:clamp(1rem,3vw,1.75rem)}@media (max-width:720px){.calc-grid{grid-template-columns:minmax(0,1fr)}}.panel-title{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600;margin:0 0 .75rem}.segmented{display:flex;gap:5px;margin-bottom:1rem;flex-wrap:wrap}.segment{flex:1 1 auto;min-width:84px;text-align:center;font-size:.88rem;padding:8px 10px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface-alt);color:var(--muted);cursor:pointer;font-family:inherit}.segment:hover{border-color:var(--border-strong);color:var(--ink)}.segment.is-active{background:var(--brand-gold);border-color:var(--brand);color:var(--on-brand);font-weight:600}.panel-head{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap}.unit-toggle{flex:0 0 auto;margin-bottom:.75rem}.unit-toggle .segment{min-width:66px;padding:4px 10px;font-size:.8rem}.field{margin-bottom:.85rem}.field-label{display:block;font-size:.9rem;color:var(--ink);font-weight:500;margin-bottom:4px}.field-control{display:flex;align-items:stretch;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);overflow:hidden}.field-control:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(234,97,19,.14)}.field-input{flex:1 1;min-width:0;border:0;background:transparent;padding:9px 11px;font:inherit;font-size:.98rem;color:var(--ink);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.field-input:focus{outline:none}.field-unit{display:flex;align-items:center;padding:0 11px;background:var(--surface-alt);border-left:1px solid var(--border);color:var(--muted);font-size:.85rem;white-space:nowrap}.field-help{color:var(--muted)}.field-error,.field-help{font-size:.82rem;margin:3px 0 0}.field-error{color:var(--warn)}.calc-results{background:var(--surface-alt);border-radius:var(--radius);padding:clamp(.9rem,2.5vw,1.25rem);align-self:start}.result-label{font-size:.85rem;color:var(--muted);margin:0}.result-value{font-size:clamp(1.85rem,1.3rem + 2vw,2.4rem);line-height:1.15;color:var(--result);font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:-.02em;margin:2px 0 0}.result-list{margin:1rem 0 0;border-top:1px solid var(--border)}.result-row{display:flex;justify-content:space-between;gap:1rem;padding:7px 0;border-bottom:1px solid var(--border);font-size:.92rem}.result-row dt{color:var(--body);margin:0}.result-row dd{color:var(--ink);font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;margin:0;text-align:right}.result-formula{font-family:var(--font-mono);font-size:.82rem;color:var(--muted);margin:.9rem 0 0;word-break:break-word}.callout{background:var(--brand-tint);color:var(--on-brand);padding:11px 14px;border-radius:var(--radius);font-size:.92rem;margin:1rem 0}.callout-warn{border-radius:0;border-top:3px solid transparent;border-image:repeating-linear-gradient(45deg,#ea6113 0 8px,#ffe3b3 8px 16px) 3}.presets{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 1rem}.preset{font-size:.85rem;padding:5px 11px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--body);cursor:pointer;font-family:inherit}.preset:hover{border-color:var(--brand);color:var(--ink);background:var(--surface-alt)}.action-bar{display:flex;flex-wrap:wrap;gap:8px;margin-top:1rem}.action-bar,.btn{align-items:center}.btn{display:inline-flex;gap:7px;font-family:inherit;font-size:.9rem;line-height:1;padding:9px 14px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--surface);color:var(--ink);text-decoration:none;cursor:pointer;transition:background var(--dur-base) var(--ease-out),border-color var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out)}.btn svg{width:15px;height:15px;flex:none;transition:transform var(--dur-base) var(--ease-out)}.btn:hover svg{transform:translateX(3px)}@media (prefers-reduced-motion:reduce){.btn,.btn:hover,.btn:hover svg{transform:none}}.btn:hover{background:var(--surface-alt);border-color:var(--brand);color:var(--ink);transform:translateY(-1px)}.btn-lg{font-size:.94rem;font-weight:600;gap:8px;padding:12px 20px}.btn-lg svg{width:17px;height:17px}.btn-primary{border:1px solid transparent;background:var(--brand-gradient);color:var(--on-brand);font-weight:600}.btn-primary.btn-lg{padding:12px 22px}.btn-primary:hover{background:var(--brand-gradient);border-color:transparent;color:var(--on-brand);filter:saturate(1.06) brightness(1.03)}.action-flash{font-size:.85rem;color:var(--result);min-width:5.5rem}.print-head{margin-bottom:4mm}.print-title{font-size:14pt;font-weight:700;color:#000;margin:0}.print-meta{font-size:9pt;color:#555;margin:0}.result-attribution{margin:.9rem 0 0;padding-top:.75rem;border-top:1px solid var(--border);font-size:.78rem;color:var(--muted);letter-spacing:.01em}.result-attribution strong{color:var(--brand-text);font-weight:600}.rule-measured{height:9px;border-top:1px solid var(--border);background-image:linear-gradient(90deg,var(--border) 1px,transparent 1px);background-size:8px 9px;margin:2.5rem 0 1.5rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));grid-gap:12px;gap:12px;margin:0 0 1.5rem;padding:0;list-style:none}.card{display:block;position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:1rem 1.1rem;text-decoration:none;height:100%;transition:border-color var(--dur-base) var(--ease-out),box-shadow var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out)}.card:hover{border-color:var(--brand);transform:translateY(-2px)}@media (prefers-reduced-motion:reduce){.card:hover{transform:none}}.card h3{margin:0 0 4px;font-size:1rem;color:var(--ink)}.card p{margin:0;font-size:.9rem;color:var(--muted);line-height:1.5}.calc-card{display:flex;flex-direction:column;min-height:168px;padding:1.15rem 1.2rem 1.25rem}.calc-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--brand-gradient);opacity:0;transition:opacity var(--dur-base) var(--ease-out)}.calc-card:focus-visible:before,.calc-card:hover:before{opacity:1}.calc-card-icon{display:grid;place-items:center;width:42px;height:42px;margin-bottom:.85rem;border-radius:11px;background:var(--brand-tint);color:var(--on-brand);transition:background var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out)}.calc-card-icon svg{width:24px;height:24px}.calc-card:hover .calc-card-icon{background:var(--brand-mid);transform:scale(1.06)}@media (prefers-reduced-motion:reduce){.calc-card:hover .calc-card-icon{transform:none}}.calc-card h3{margin:0 0 5px;font-size:1.02rem;line-height:1.3;letter-spacing:-.01em}.calc-card p{margin:0 0 auto;font-size:.88rem}[data-theme=dark] .calc-card-icon{background:rgba(248,143,34,.14);color:var(--brand-gold)}[data-theme=dark] .calc-card:hover .calc-card-icon{background:var(--brand-mid);color:var(--on-brand)}.cat-card{display:flex;flex-direction:column;min-height:196px;padding:1.15rem 1.2rem 1.1rem}.cat-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--brand-gradient);opacity:0;transition:opacity var(--dur-base) var(--ease-out)}.cat-card:focus-visible:before,.cat-card:hover:before{opacity:1}.cat-card-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:.85rem;border-radius:12px;background:var(--brand-gradient);color:var(--on-brand);transition:transform var(--dur-base) var(--ease-out)}.cat-card-icon svg{width:25px;height:25px}.cat-card:hover .cat-card-icon{transform:scale(1.06)}@media (prefers-reduced-motion:reduce){.cat-card:hover .cat-card-icon{transform:none}}.cat-card h3{margin:0 0 5px;font-size:1.06rem;letter-spacing:-.01em}.cat-card p{margin:0 0 auto;font-size:.88rem}.cat-card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:.9rem;padding-top:.75rem;border-top:1px solid var(--border)}.cat-count{font-size:.78rem;font-weight:600;letter-spacing:.01em;color:var(--brand-text)}.cat-arrow{width:17px;height:17px;flex:none;color:var(--muted);transition:transform var(--dur-base) var(--ease-out),color var(--dur-base) var(--ease-out)}.cat-card:hover .cat-arrow{transform:translateX(3px);color:var(--brand-text)}@media (prefers-reduced-motion:reduce){.cat-card:hover .cat-arrow{transform:none}}.hub-bookmark{border-left:3px solid var(--brand);padding-left:1.25rem}.save-prompt{position:fixed;left:16px;bottom:16px;z-index:70;width:min(340px,calc(100vw - 32px));background:var(--surface);border:1px solid var(--border);border-top:3px solid var(--brand);border-radius:var(--radius-card);box-shadow:var(--shadow-menu);padding:1rem 1.15rem 1.1rem;animation:enter var(--dur-enter) var(--ease-out) both}.save-close{position:absolute;top:8px;right:8px;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:var(--radius);background:none;color:var(--muted);cursor:pointer}.save-close:hover{background:var(--surface-alt);color:var(--ink)}.save-title{margin:0 0 .35rem;font-weight:700;color:var(--ink);font-size:1rem;padding-right:1.5rem}.save-body{margin:0 0 .85rem;font-size:.9rem;color:var(--body);line-height:1.5}.save-body strong{color:var(--ink)}.save-done{margin:0;font-size:.95rem;color:var(--result);font-weight:600;padding-right:1.5rem}.save-actions{display:flex;gap:8px;flex-wrap:wrap}.save-actions .btn{font-size:.86rem;padding:7px 14px}kbd{font-family:var(--font-mono);font-size:.84em;background:var(--surface-alt);border:solid var(--border);border-width:1px 1px 2px;border-radius:5px;padding:1px 6px;color:var(--ink);white-space:nowrap}@media (max-width:560px){.save-prompt{left:12px;right:12px;bottom:12px;width:auto}}.diagram-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:12px;gap:12px;margin:0 0 2rem}.diagram{margin:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:.75rem .9rem .9rem}.diagram svg{width:100%;height:auto;display:block}.d-label{fill:var(--ink);font-size:11px;font-weight:700;font-family:var(--font-sans)}.diagram figcaption strong{display:block;font-size:.92rem;color:var(--ink)}.diagram figcaption span{display:block;font-size:.8rem;color:var(--muted);line-height:1.45}.formula-list{list-style:none;margin:1.25rem 0;padding:0;border-top:1px solid var(--border)}.formula-list li{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;padding:10px 0;border-bottom:1px solid var(--border)}.formula-label{flex:0 0 7rem;font-size:.85rem;font-weight:600;color:var(--brand-text)}.formula-list code{background:none;padding:0;font-size:.92rem;color:var(--ink)}.example-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:12px;gap:12px;margin-bottom:1.5rem}.example{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:1.1rem 1.25rem}.example h3{margin:0 0 .35rem;font-size:1.02rem}.example-scenario{margin:0 0 .9rem;font-size:.9rem;color:var(--muted);line-height:1.5}.example-steps{margin:0;border-top:1px solid var(--border)}.example-steps>div{display:flex;justify-content:space-between;gap:1rem;padding:6px 0;border-bottom:1px solid var(--border);font-size:.88rem}.example-steps dt{color:var(--body);margin:0}.example-steps dd{margin:0;color:var(--ink);font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;text-align:right;font-family:var(--font-mono);font-size:.84rem}.example-answer{margin:.9rem 0 0;font-size:1.02rem;font-weight:700;color:var(--result);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.example-note{margin:.5rem 0 0;font-size:.86rem;color:var(--muted);line-height:1.55}.ref-table{margin-bottom:2rem}.ref-table h3{margin-top:0}.ref-caption{font-size:.86rem;color:var(--muted);margin:-.25rem 0 .75rem}.author-card{background:var(--surface);border:1px solid var(--border);border-top:3px solid var(--brand);border-radius:var(--radius-card);padding:1.1rem 1.35rem;margin-bottom:2rem;max-width:46ch}.author-name{margin:0;font-size:1.15rem;font-weight:700;color:var(--ink)}.author-role{margin:0 0 .6rem;font-size:.9rem;color:var(--brand-text);font-weight:600}.author-facts{list-style:none;margin:0;padding:0;font-size:.92rem;color:var(--body)}.author-facts li{padding:3px 0 3px 18px;position:relative}.author-facts li:before{content:"";position:absolute;left:0;top:.75em;width:8px;height:2px;background:var(--brand)}.byline{font-size:.88rem;color:var(--muted);border-top:1px solid var(--border);padding-top:1rem;margin-top:2rem}.table-scroll{overflow-x:auto;margin-bottom:1.5rem}.table-scroll table{min-width:640px;margin-bottom:0}.table-scroll th[scope=row]{background:none;font-weight:500;color:var(--ink)}.source-list{list-style:none;padding:0;margin:0 0 1.5rem;counter-reset:src}.source-list li{counter-increment:src;border-top:1px solid var(--border);padding:1rem 0 1rem 2.5rem;position:relative}.source-list li:before{content:counter(src);position:absolute;left:0;top:1rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--brand-text);font-weight:600;font-size:.9rem}.source-title{margin:0;font-weight:600;color:var(--ink)}.source-publisher{margin:0;font-size:.86rem;color:var(--brand-text)}.source-what{margin:.35rem 0 0;font-size:.94rem;color:var(--body)}.log-day{border-top:1px solid var(--border);padding-top:1rem;margin-bottom:1.5rem}.log-day h3{margin:0 0 .6rem;font-size:.95rem;color:var(--muted);font-weight:600}.log-list{list-style:none;padding:0;margin:0}.log-list li{display:flex;gap:12px;align-items:baseline;padding:7px 0;font-size:.95rem}.log-kind{flex:0 0 auto;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;padding:2px 9px;border-radius:999px;border:1px solid var(--border);color:var(--muted);min-width:5.5rem;text-align:center}.log-added{border-color:var(--brand);color:var(--brand-text)}.log-corrected,.log-fixed{border-color:var(--result);color:var(--result)}.trust-note{border-left:3px solid var(--border);padding-left:1.25rem}.trust-note h2{font-size:1.15rem;margin-top:0}.trust-note p{font-size:.95rem}.faq-item{border-bottom:1px solid var(--border);padding:.85rem 0}.faq-item h3{margin:0 0 .35rem;font-size:1rem}.faq-item p{margin:0;font-size:.95rem}.ad-slot{display:block;margin:2rem auto;text-align:center;overflow:hidden}.ad-slot[data-slot=in-content],.ad-slot[data-slot=mid-article]{min-height:280px}.embed-wrap{max-width:720px;margin:0 auto;padding:14px 14px 10px}.embed-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}.embed-head .embed-brand{display:inline-flex;line-height:0}.embed-title{font-weight:700;color:var(--ink);font-size:1.05rem}.embed-credit{margin:12px 2px 4px;padding-top:10px;border-top:1px solid var(--border);color:var(--muted);font-size:.82rem}.embed-credit a{color:var(--brand-text);font-weight:600}.embed-code pre{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;overflow-x:auto;font-family:var(--font-mono);font-size:.8rem;line-height:1.55;-webkit-user-select:all;-moz-user-select:all;user-select:all}.calc-visual{margin-top:14px;border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface);padding:14px 16px 12px}.calc-visual .panel-head{align-items:baseline;gap:12px}.visual-note{color:var(--muted);font-size:.78rem;margin:0;max-width:46ch;text-align:right}.visual-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.visual-model{flex:1 1 300px;max-width:420px;height:auto}.iso-top{fill:var(--surface-alt)}.iso-left,.iso-top{stroke:var(--border-strong);stroke-width:1}.iso-left{fill:var(--border)}.iso-right{fill:var(--border-strong);stroke:var(--border-strong);stroke-width:1}.iso-label{fill:var(--body);font-family:var(--font-mono);font-size:12px}.visual-bags{flex:0 1 220px}.bag-grid{display:flex;flex-wrap:wrap;gap:4px;max-width:220px;margin:6px 0}.bag{width:16px;height:10px;border-radius:3px;background:var(--brand-mid);border:1px solid var(--brand)}.visual-caption{color:var(--muted);font-size:.78rem;margin:0}.visual-caption.strong{color:var(--ink);font-weight:700;font-size:.9rem}@media (max-width:640px){.calc-visual .panel-head{flex-direction:column;align-items:flex-start;gap:2px}.visual-note{text-align:left}}@keyframes enter{0%{opacity:0;transform:translate3d(0,var(--enter-y,14px),0) scale(var(--enter-scale,.985))}to{opacity:1;transform:translateZ(0) scale(1)}}@keyframes enter-fade{0%{opacity:0}to{opacity:1}}@keyframes menu-in{0%{opacity:0;transform:translate3d(0,-6px,0) scale(.98)}to{opacity:1;transform:translateZ(0) scale(1)}}@keyframes sweep{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.enter{animation:enter var(--dur-enter) var(--ease-out) both}.enter-fade{animation:enter-fade var(--dur-enter) var(--ease-out) both}.stagger>*{animation:enter var(--dur-enter) var(--ease-out) both}.stagger>:first-child{animation-delay:40ms}.stagger>:nth-child(2){animation-delay:90ms}.stagger>:nth-child(3){animation-delay:.14s}.stagger>:nth-child(4){animation-delay:.19s}.stagger>:nth-child(5){animation-delay:.24s}.stagger>:nth-child(6){animation-delay:.29s}.stagger>:nth-child(7){animation-delay:.33s}.stagger>:nth-child(8){animation-delay:.37s}.stagger>:nth-child(n+9){animation-delay:.41s}.delay-1{animation-delay:80ms}.delay-2{animation-delay:.16s}.delay-3{animation-delay:.24s}.delay-4{animation-delay:.32s}@supports (animation-timeline:view()){@media (prefers-reduced-motion:no-preference){.reveal{animation:enter 1ms var(--ease-out) both;animation-timeline:view();animation-range:entry 0 entry 55%}}}.sweep{transform-origin:left center;animation:sweep .9s var(--ease-out) both;animation-delay:.12s}@media (prefers-reduced-motion:reduce){.enter,.enter-fade,.reveal,.stagger>*,.sweep{animation:none!important;opacity:1!important;transform:none!important}}@media print{@page{margin:16mm 14mm}:root{--page:#ffffff;--surface:#ffffff;--surface-alt:#ffffff;--border:#999999;--ink:#000000;--body:#1a1a1a;--muted:#555555;--result:#000000;--brand-text:#000000}body{background:#ffffff!important;color:#000000;font-size:11pt;line-height:1.45}.action-bar,.ad-slot,.breadcrumbs,.drawer,.hero-actions,.mega-panel,.presets,.related-section,.rule-measured,.save-prompt,.search-overlay,.site-footer,.site-header,.skip-link,.unit-toggle{display:none!important}.print-only{display:block!important}.container{max-width:none;padding:0}.enter,.enter-fade,.reveal,.stagger>*,.sweep{animation:none!important;opacity:1!important;transform:none!important}.calc{border:1px solid #999999;border-radius:0;padding:0;margin:0 0 10mm;page-break-inside:avoid;break-inside:avoid}.calc-grid{grid-template-columns:1fr 1fr;gap:0}.calc-inputs,.calc-results{padding:5mm;background:none!important;border-radius:0}.calc-inputs{border-right:1px solid #999999}.field-control{border:0;border-bottom:1px solid #cccccc;border-radius:0}.field-input{padding:2px 0;font-weight:600}.field-unit{background:none!important;border:0;padding:0 0 0 6px}.field-help{display:none}.result-value{font-size:20pt;color:#000000!important}.result-row{border-bottom:1px solid #dddddd}.result-formula{border-top:1px solid #dddddd;padding-top:3mm}.callout{background:none!important;border:1px solid #999999;border-radius:0;color:#000000!important}h1{font-size:18pt;margin-bottom:2mm}h2{font-size:13pt}h2,h3{page-break-after:avoid;break-after:avoid}.page-lede,h3{font-size:11pt}.faq-item,section{page-break-inside:avoid;break-inside:avoid}.segmented[role=tablist] .segment{display:none}.segmented[role=tablist] .segment.is-active{display:inline-block;border:1px solid #999999;background:none!important;color:#000000!important;font-weight:700}a{color:#000000;text-decoration:none}.print-watermark{display:flex!important;position:fixed;inset:0;align-items:center;justify-content:center;z-index:9999;pointer-events:none;font-size:46pt;font-weight:700;letter-spacing:-.02em;white-space:nowrap;transform:rotate(-28deg);color:rgba(28,25,23,.07);-webkit-print-color-adjust:exact;print-color-adjust:exact}}.print-only,.print-watermark{display:none}