:where(.tool-page){--tool-accent:var(--site-accent);--tool-accent-ink:var(--site-accent-ink);--tool-surface:var(--site-muted-surface);--tool-ink:var(--site-ink);--tool-border:var(--site-border);--tool-radius:var(--site-radius);--tool-font-display:var(--site-font-display);--chart-palette-1:#1d5fa8;--chart-palette-2:#b8530a;--chart-palette-3:#2f7d32;--chart-palette-4:#6b4fa0}.tool-page{--tool-accent-soft:color-mix(in srgb, var(--tool-accent) 9%, #fff);--tool-line:color-mix(in srgb, var(--tool-ink) 55%, #fff);--diagram-ink:var(--tool-ink);--diagram-top:color-mix(in srgb, var(--tool-accent) 14%, #fff);--diagram-side:color-mix(in srgb, var(--tool-accent) 30%, #fff);--diagram-front:color-mix(in srgb, var(--tool-accent) 22%, #fff);--diagram-pattern:color-mix(in srgb, var(--tool-accent) 45%, #fff);--diagram-dim:var(--tool-accent)}.tool-page h1,.tool-page h2{font-family:var(--tool-font-display)}.tool-hero{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.9rem;display:flex}.tool-hero__img{flex:none;width:84px;height:auto}.tool-category{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.06em;margin:0;font-weight:700}.tool-category a{color:var(--site-muted-ink);text-decoration:none}.tool-category a:hover{color:var(--tool-accent);text-decoration:underline}.tool-intro{max-width:48rem;color:var(--site-muted-ink);margin:0;font-size:1.02rem}@media (width<=30rem){.tool-hero__img{width:56px}}.tool-frame{background:var(--tool-surface);color:var(--tool-ink);border:1px solid var(--tool-border);border-top:4px solid var(--tool-accent);border-radius:var(--tool-radius);gap:1rem;padding:1rem;display:grid}.tool-frame>*{min-width:0}@media (width>=48rem){.tool-frame{gap:1.25rem;padding:1.25rem}.tool-page:not([data-layout=stacked]) .tool-frame{grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);align-items:start}}.tool-output{align-content:start;gap:1rem;display:grid}.tool-form fieldset{border:0;min-width:0;margin:0 0 .9rem;padding:0}.tool-form legend{margin-bottom:.45rem;padding:0;font-size:1rem;font-weight:800}.tool-form__fields{grid-template-columns:repeat(auto-fill,minmax(min(100%,12.5rem),1fr));gap:0 .85rem;display:grid}.calc-field{min-width:0;margin-bottom:.7rem}.calc-field label{margin-bottom:.25rem;font-size:.97rem;font-weight:650;line-height:1.3;display:block}.calc-input{position:relative}.calc-field input,.calc-field select{width:100%;font:inherit;border:1.5px solid var(--site-border-strong,#767676);border-radius:calc(var(--tool-radius) * .75);color:#1f2328;font-variant-numeric:tabular-nums;background:#fff;min-height:2.75rem;padding:.5rem .7rem;font-size:1.02rem;transition:border-color .12s,box-shadow .12s}.calc-input--suffix input{padding-right:calc(var(--suffix-ch,3) * .62em + 1.3rem)}.calc-input__unit{color:#4d545b;pointer-events:none;white-space:nowrap;font-size:.9rem;position:absolute;top:50%;right:.7rem;transform:translateY(-50%)}.calc-field select{-webkit-appearance:none;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%231f2328' stroke-width='1.8'/%3E%3C/svg%3E");background-position:right .75rem center;background-repeat:no-repeat;background-size:.75rem;padding-right:2.2rem}.calc-field input:hover,.calc-field select:hover{border-color:var(--tool-ink)}.calc-field input:focus-visible,.calc-field select:focus-visible{border-color:var(--tool-accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--tool-accent) 35%, transparent);outline:none}.calc-field input[aria-invalid=true],.calc-field select[aria-invalid=true]{background:#fff8f7;border-width:2px;border-color:#b3261e}.calc-unit{color:var(--site-muted-ink);font-weight:400}.calc-help{color:var(--site-muted-ink);margin:.25rem 0 0;font-size:.85rem;line-height:1.4}.calc-error{color:#b3261e;margin:.25rem 0 0;font-size:.88rem;font-weight:650}.calc-error:empty{display:none}.calc-error:before{content:"! ";font-weight:800}.tool-form__actions{flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:.25rem;display:flex}.tool-submit,.tool-reset{font:inherit;cursor:pointer;border-radius:999px;min-height:2.75rem;padding:.55rem 1.3rem;font-weight:700}.tool-submit{background:var(--tool-accent);color:var(--tool-accent-ink);border:2px solid var(--tool-accent)}.tool-submit:hover{filter:brightness(1.1)}.tool-reset{color:var(--tool-ink);border:1.5px solid var(--site-border-strong,#767676);background:0 0;font-weight:600}.tool-reset:hover{background:#fff}.tool-submit:focus-visible,.tool-reset:focus-visible{outline:3px solid var(--tool-ink);outline-offset:2px}.calc-advanced{border:1px solid var(--tool-border);border-radius:calc(var(--tool-radius) * .75);background:color-mix(in srgb, var(--tool-surface) 50%, #fff);margin:0 0 .9rem}.calc-advanced>summary{cursor:pointer;border-radius:calc(var(--tool-radius) * .75);align-items:center;gap:.5rem;padding:.65rem .8rem;font-weight:700;list-style:none;display:flex}.calc-advanced>summary::-webkit-details-marker{display:none}.calc-advanced>summary:before{content:"";border-bottom:2px solid;border-right:2px solid;flex:none;width:.5rem;height:.5rem;transition:transform .15s;transform:rotate(-45deg)}.calc-advanced[open]>summary:before{transform:rotate(45deg)}.calc-advanced>summary:focus-visible{outline:3px solid var(--tool-ink);outline-offset:2px}.calc-advanced[open]>summary{border-bottom:1px solid var(--tool-border)}.calc-advanced__hint{color:var(--site-muted-ink);font-weight:400}.calc-advanced__body{padding:.8rem .8rem 0}.calc-advanced__group{margin:0 0 .6rem}.calc-advanced__legend{margin:0 0 .35rem;font-weight:700}.calc-sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.calc-field[hidden],.tool-form fieldset[hidden],.calc-advanced__group[hidden]{display:none}.calc-results{color:var(--tool-ink);border-radius:calc(var(--tool-radius) * 1.5);border:1px solid var(--tool-border);box-shadow:var(--site-shadow);background:#fff;padding:1.1rem 1.1rem .9rem}.calc-results__head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.75rem;display:flex}.calc-results__title{text-transform:uppercase;letter-spacing:.06em;color:var(--tool-ink);margin:0;font-size:1.05rem}.calc-units{border:1.5px solid var(--tool-line);background:#fff;border-radius:999px;padding:2px;display:inline-flex}.calc-units[hidden]{display:none}.calc-units__btn{color:var(--tool-ink);cursor:pointer;background:0 0;border:0;border-radius:999px;min-height:2rem;padding:.25rem .75rem;font-size:.85rem;font-weight:650}.calc-units__btn[aria-pressed=true]{background:var(--tool-accent);color:var(--tool-accent-ink)}.calc-units__btn:focus-visible{outline:3px solid var(--tool-ink);outline-offset:1px}.calc-primary{background:var(--tool-accent-soft);border-left:5px solid var(--tool-accent);border-radius:calc(var(--tool-radius) * .75);padding:.75rem 1rem .85rem}.calc-primary__label{margin:0;font-size:.95rem;font-weight:700}.calc-primary__value{font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:var(--tool-ink);overflow-wrap:anywhere;margin:.1rem 0 0;font-size:clamp(2.3rem,7vw,3.25rem);font-weight:800;line-height:1.05}.calc-primary__unit{letter-spacing:0;color:var(--tool-ink);font-size:.42em;font-weight:650}.calc-keys{grid-template-columns:repeat(auto-fit,minmax(8.5rem,1fr));gap:.5rem;margin:.6rem 0 0;display:grid}.calc-key{border:1px solid var(--tool-border);border-radius:calc(var(--tool-radius) * .75);background:#fff;padding:.5rem .7rem}.calc-key dt{color:var(--site-muted-ink);font-size:.82rem;font-weight:600;line-height:1.3}.calc-key dd{font-variant-numeric:tabular-nums;margin:.1rem 0 0;font-size:1.3rem;font-weight:800}.calc-key dd .calc-unit{color:var(--tool-ink);font-size:.8rem;font-weight:600}.calc-breakdown{gap:.75rem;margin-top:.9rem;display:grid}.calc-breakdown__group[hidden],.calc-key[hidden],.calc-result[hidden]{display:none}.calc-breakdown__title{text-transform:uppercase;letter-spacing:.08em;color:var(--site-muted-ink);font-size:.78rem;font-family:var(--site-font-body);margin:0 0 .2rem}.calc-breakdown dl{margin:0}.calc-result{align-items:baseline;gap:.5rem;padding:.28rem 0;font-size:.97rem;display:flex}.calc-result dt{flex:auto;align-items:baseline;gap:.5rem;min-width:0;display:flex}.calc-result dt:after{content:"";border-bottom:1.5px dotted var(--tool-line);flex:1.5rem;min-width:1rem;transform:translateY(-.25em)}.calc-result dd{font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap;margin:0;font-weight:750}.calc-result dd .calc-unit{font-weight:500}.calc-result__unitval+.calc-result__unitval:before{content:" · ";color:var(--site-muted-ink);font-weight:400}.calc-results.has-unit-toggle .calc-result__unitval[data-unit-index]{display:none}.calc-results.has-unit-toggle .calc-result__unitval+.calc-result__unitval:before{content:none}.calc-results.has-unit-toggle[data-unit="0"] .calc-result__unitval[data-unit-index="0"],.calc-results.has-unit-toggle[data-unit="1"] .calc-result__unitval[data-unit-index="1"],.calc-results.has-unit-toggle[data-unit="2"] .calc-result__unitval[data-unit-index="2"]{display:inline}@media (width<=26rem){.calc-result{flex-wrap:wrap}.calc-result dd{white-space:normal}}.calc-results__invalid{border-radius:calc(var(--tool-radius) * .75);color:#8c1d16;background:#fff4f2;border:1px solid #e3b4ae;margin:.75rem 0 0;padding:.6rem .8rem;font-size:.95rem;font-weight:650;display:none}.calc-results__invalid span{color:#fff;background:#b3261e;border-radius:50%;place-items:center;width:1.3rem;height:1.3rem;margin-right:.35rem;font-size:.8rem;display:inline-grid}.calc-results[data-state=invalid] .calc-results__invalid{display:block}.calc-results[data-state=invalid] .calc-primary__value,.calc-results[data-state=invalid] .calc-keys,.calc-results[data-state=invalid] .calc-breakdown{opacity:.35}.calc-results[data-state=empty] .calc-primary__value{color:var(--site-muted-ink)}.calc-results__noscript{background:var(--tool-accent-soft);border-radius:6px;margin:.75rem 0 0;padding:.6rem .8rem;font-size:.92rem}.calc-actions{flex-wrap:wrap;gap:.45rem;margin-top:.9rem;display:flex}.calc-actions[hidden]{display:none}.calc-action{cursor:pointer;color:var(--tool-ink);border:1.5px solid var(--tool-line);background:#fff;border-radius:999px;align-items:center;gap:.35rem;min-height:2.25rem;padding:.35rem .85rem;font-size:.88rem;font-weight:650;display:inline-flex}.calc-action:hover{border-color:var(--tool-ink);background:var(--tool-accent-soft)}.calc-action:focus-visible{outline:3px solid var(--tool-ink);outline-offset:2px}.calc-action[hidden]{display:none}.calc-actions__status{overflow-wrap:anywhere;min-height:0;margin:.4rem 0 0;font-size:.88rem;font-weight:600}.calc-actions__status:empty{display:none}.calc-results__notice{border-top:1px solid var(--tool-border);color:var(--site-muted-ink);margin:.9rem 0 0;padding-top:.6rem;font-size:.82rem;line-height:1.45}.calc-results__notice a{color:inherit;text-underline-offset:2px;text-decoration:underline}.calc-updated{color:var(--site-muted-ink);margin:.6rem 0 0;font-size:.88rem}.calc-updated a{color:inherit}.calc-figure{border:1px solid var(--tool-border);border-radius:calc(var(--tool-radius) * 1.5);color:var(--tool-ink);background:#fff;margin:0;padding:.75rem .85rem .65rem}.calc-figure figcaption{color:var(--site-muted-ink);font-size:.85rem;font-weight:600}.calc-chart-figure figcaption{color:var(--tool-ink);margin-bottom:.25rem;font-weight:700}.calc-diagram figcaption{margin-top:.25rem}.calc-chart,.calc-diagram__svg{min-width:0;color:var(--tool-ink)}.calc-chart svg,.calc-diagram__svg svg{width:100%;max-width:100%;height:auto;margin:0 auto;display:block}.calc-diagram__svg svg{max-width:30rem}.calc-chart svg{max-width:34rem}.calc-chart:empty:before{content:"Chart appears with valid inputs.";color:var(--site-muted-ink);font-size:.85rem}.tool-chart text{font-family:var(--site-font-body)}.tool-chart__tick,.tool-chart__sub{fill:var(--site-muted-ink)}.tool-diagram text{font-family:var(--site-font-body);fill:var(--diagram-ink)}.tool-diagram .dg-label{paint-order:stroke;stroke:#fff;stroke-width:3.5px;stroke-linejoin:round}.tool-diagram .dg-label--dim{fill:var(--diagram-ink)}.tool-diagram .dg-label--on{stroke:color-mix(in srgb, var(--diagram-top) 85%, #fff)}.tool-diagram .dg-note{fill:var(--site-muted-ink);font-style:italic}.tool-diagram .dg-shape{stroke:var(--diagram-ink);stroke-width:1.4px;stroke-linejoin:round}.tool-diagram .dg-shape--top{fill:var(--diagram-top)}.tool-diagram .dg-shape--side{fill:var(--diagram-side)}.tool-diagram .dg-shape--front{fill:var(--diagram-front)}.tool-diagram .dg-floor{fill:color-mix(in srgb, var(--tool-ink) 8%, #fff)}.tool-diagram .dg-ceiling{fill:color-mix(in srgb, var(--tool-accent) 10%, #fff);stroke-dasharray:4 3}.tool-diagram .dg-hole{fill:#fff}.tool-diagram .dg-insul{fill:#f6e7b3}.tool-diagram .dg-badge{fill:#fff;stroke:var(--diagram-ink);stroke-width:1.4px}.tool-diagram .dg-post{fill:var(--diagram-side);stroke:var(--diagram-ink);stroke-width:1.2px}.tool-diagram .dg-pat{stroke:var(--diagram-pattern);stroke-width:1px;fill:none}.tool-diagram .dg-line{stroke:var(--diagram-ink);stroke-width:1.4px;fill:none}.tool-diagram .dg-line--strong{stroke-width:2.6px}.tool-diagram .dg-line--accent{stroke:var(--diagram-dim);stroke-width:2.2px}.tool-diagram .dg-line--hidden{stroke-dasharray:5 4;stroke-width:1px}.tool-diagram .dg-line--ground{stroke-width:1.2px;stroke-dasharray:2 3}.tool-diagram .dg-line--bar{stroke:var(--diagram-dim);stroke-width:1.6px}.tool-diagram .dg-line--layer{stroke-dasharray:4 3}.tool-diagram .dg-dim{stroke:var(--diagram-dim);stroke-width:1.3px}.tool-diagram .dg-ext{stroke:var(--diagram-dim);stroke-width:.9px}.tool-diagram .dg-arrow{fill:var(--diagram-dim)}.tool-diagram .dg-flow{stroke:var(--diagram-dim);stroke-width:2px;stroke-dasharray:6 4}.calc-sticky{z-index:30;text-align:center;background:var(--tool-ink);color:#fff;font-variant-numeric:tabular-nums;border-radius:999px;padding:.7rem 1rem;font-weight:700;text-decoration:none;display:block;position:fixed;bottom:.75rem;left:.75rem;right:.75rem;box-shadow:0 6px 24px #00000040}.calc-sticky[hidden]{display:none}.calc-sticky:focus-visible{outline:3px solid var(--tool-accent);outline-offset:2px}@media (width>=48rem){.calc-sticky{display:none!important}}.tool-guide{max-width:52rem;margin-top:.5rem}.tool-guide__eyebrow{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--site-muted-ink);margin:0 0 .5rem;font-weight:800}.tool-guide .tool-content{max-width:none;margin:0}.tool-content>p,.tool-content>ul,.tool-content>ol{max-width:46rem}.tool-section{border:1px solid var(--site-border);border-radius:var(--site-radius);background:var(--site-surface,#fff);margin:0 0 .5rem}.tool-section>summary{cursor:pointer;border-radius:var(--site-radius);flex-wrap:wrap;align-items:baseline;gap:.15rem .75rem;padding:.8rem 2.75rem .8rem 1rem;list-style:none;display:flex;position:relative}.tool-section>summary::-webkit-details-marker{display:none}.tool-section>summary:after{content:"";border-bottom:2px solid;border-right:2px solid;width:.55rem;height:.55rem;transition:transform .15s;position:absolute;top:1.15rem;right:1.1rem;transform:rotate(45deg)}.tool-section[open]>summary:after{top:1.35rem;transform:rotate(-135deg)}.tool-section>summary:hover{background:var(--site-muted-surface)}.tool-section>summary:focus-visible{outline:3px solid var(--site-accent);outline-offset:2px}.tool-section>summary h2{margin:0;font-size:1.1rem;display:inline}.tool-section__hint{color:var(--site-muted-ink);font-size:.85rem}.tool-section[open]>summary{border-bottom:1px solid var(--site-border);border-radius:var(--site-radius) var(--site-radius) 0 0}.tool-section__body{padding:.25rem 1rem .75rem}.tool-section__body>*{max-width:46rem}.tool-section__body>table,.tool-section__body>.table-wrap{max-width:100%}.tool-faq{border-top:1px solid var(--site-border)}.tool-faq:first-of-type{border-top:0}.tool-faq>summary{cursor:pointer;padding:.6rem 1.75rem .6rem 0;list-style:none;position:relative}.tool-faq>summary::-webkit-details-marker{display:none}.tool-faq>summary:after{content:"+";color:var(--site-accent);font-size:1.15rem;font-weight:800;position:absolute;top:.45rem;right:.25rem}.tool-faq[open]>summary:after{content:"–"}.tool-faq>summary:focus-visible{outline:3px solid var(--site-accent);outline-offset:2px}.tool-faq>summary h3{margin:0;font-size:1rem;display:inline}.tool-faq__body>:first-child{margin-top:0}.tool-content table{font-variant-numeric:tabular-nums;max-width:100%;font-size:.95rem;display:block;overflow-x:auto}.tool-content thead th{background:var(--site-muted-surface)}.calc-sources ol{padding-left:1.25rem}.calc-sources li{margin-bottom:.35rem}.calc-sources__date{color:var(--site-muted-ink);font-size:.9rem}.tool-related{margin-top:2rem}.tool-related h2{margin:0 0 .6rem;font-size:1.15rem}.tool-related__list{grid-template-columns:repeat(auto-fill,minmax(min(100%,14rem),1fr));gap:.6rem;margin:0;padding:0;list-style:none;display:grid}.tool-related__card{border:1px solid var(--site-border);border-radius:var(--site-radius);background:var(--site-surface,#fff);height:100%;color:var(--site-ink);padding:.75rem .9rem;text-decoration:none;display:block}.tool-related__card:hover{border-color:var(--site-accent);box-shadow:var(--site-shadow)}.tool-related__name{color:var(--site-accent);font-weight:750;display:block}.tool-related__blurb{color:var(--site-muted-ink);font-size:.9rem;display:block}.tool-page[data-layout=stepper] .tool-form{counter-reset:step}.tool-page[data-layout=stepper] .tool-form fieldset{counter-increment:step;padding-left:2.4rem;position:relative}.tool-page[data-layout=stepper] .tool-form fieldset:before{content:counter(step);background:var(--tool-accent);width:1.75rem;height:1.75rem;color:var(--tool-accent-ink);border-radius:50%;place-items:center;font-size:.9rem;font-weight:700;display:grid;position:absolute;top:0;left:0}@media print{.tool-frame{background:#fff;border:0;padding:0;display:block}.tool-form__actions,.calc-actions,.calc-actions__status,.calc-units,.calc-sticky,.tool-guide,.tool-related,.tool-hero__img,.calc-help,.calc-advanced>summary:before{display:none!important}.calc-advanced{border:0}.calc-advanced:not([open]){display:none}.tool-form__fields{grid-template-columns:repeat(3,1fr)}.calc-field input,.calc-field select{background-image:none;border:1px solid #999;min-height:0;padding:.15rem .4rem}.calc-diagram figcaption{display:none}.calc-results,.calc-figure{box-shadow:none;break-inside:avoid;margin-top:.5rem}.calc-results.has-unit-toggle .calc-result__unitval[data-unit-index]{display:inline}.calc-results.has-unit-toggle .calc-result__unitval+.calc-result__unitval:before{content:" · "}.tool-output{display:block}.calc-diagram,.calc-chart-figure{max-width:70%}}.ad-slot[data-astro-cid-m2ztedwe]{box-sizing:border-box;width:100%;min-height:var(--ad-slot-height);border:1px dashed var(--site-border,#c9c9c9);background:var(--site-muted-surface,#f6f6f6);border-radius:6px;margin:2.5rem 0}