@layer base{:root{--ink:#181a1b;--muted:#62676d;--line:#e3e5e8;--soft:#f5f6f7;--accent:#c74b08;--accent-light:#fff1e7;--radius:24px;color:var(--ink);font-synthesis:none;background:#fff;font-family:Arial,Helvetica,sans-serif;font-size:18px}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}input{min-width:0}input:focus{outline:none}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}input[aria-invalid=true]{outline:2px solid #b91c1c!important}p{margin:0;line-height:1.6}h1,h2,h3{letter-spacing:-.04em;margin:0;line-height:1.12}h1{font-size:clamp(2rem,5.2vw,3.5rem);font-weight:700}h2{font-size:1.7rem}h3{font-size:1.1rem}button{border:0}svg{display:block}[hidden]{display:none!important}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{background:var(--ink);color:#fff;z-index:20;padding:12px;position:absolute;top:-100px;left:16px}.skip-link:focus{top:12px}}@layer layout{.wrap{width:min(1120px,100% - 64px);margin-inline:auto}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:100px;display:flex}.header-nav{align-items:center;gap:32px;display:flex}.brand{letter-spacing:-.06em;align-items:center;gap:10px;font-size:1.55rem;font-weight:750;display:flex}.brand-watt{font-weight:400}.brand-dot{color:var(--accent)}.brand-mark{background:var(--accent);color:#fff;letter-spacing:-.15em;border-radius:10px;justify-content:center;align-items:center;width:35px;height:35px;padding-right:4px;font-size:1.45rem;font-style:italic;font-weight:700;display:flex}.desktop-link{font-size:.88rem;font-weight:600}.language-link{border:1px solid var(--line);border-radius:100px;place-items:center;min-width:54px;min-height:44px;font-size:.8rem;font-weight:700;display:grid}.page-heading{max-width:840px;padding:42px 0 28px}.eyebrow{color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin-bottom:16px;font-size:.75rem;font-weight:700;display:block}.page-heading p{color:var(--muted);max-width:650px;margin-top:18px;font-size:1rem}.calculator{margin-bottom:48px}.calculator-tabs{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.calculator-tabs a{background:var(--soft);color:var(--muted);border-radius:100px;min-height:48px;padding:13px 22px;font-size:.85rem;font-weight:600}.calculator-tabs a.active{background:var(--ink);color:#fff}.calculator-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-items:start;gap:38px;display:grid}.calculator-form{border:1px solid var(--line);border-radius:var(--radius);padding:30px}.result-column{position:sticky;top:24px}.content-section{border-top:1px solid var(--line);padding:44px 0}.section-heading{margin-bottom:26px}.card-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.tool-card{background:var(--soft);border-radius:20px;padding:26px;display:block}.tool-card:hover{background:var(--accent-light)}.tool-card .tool-number{color:var(--accent);margin-bottom:30px;font-size:.8rem;font-weight:700;display:block}.tool-card h3{margin-bottom:12px;font-size:1.3rem;line-height:1.2}.tool-card p{color:var(--muted);font-size:.88rem}.editorial{max-width:780px}.editorial p{color:var(--muted);margin-bottom:18px}.editorial h2{margin-bottom:20px}.editorial h3{margin:26px 0 12px}.editorial ul{color:var(--muted);padding-left:24px;line-height:1.6}.editorial a{text-underline-offset:4px;text-decoration:underline}.formula{background:var(--soft);overflow-wrap:anywhere;border-radius:14px;margin:20px 0;padding:22px;font-family:Arial,Helvetica,sans-serif;font-size:1rem;line-height:1.6;display:block}.sources{font-size:.85rem}.updated{color:var(--muted);margin:20px 0 0;font-size:.8rem}.faq details{border-bottom:1px solid var(--line);padding:20px 0}.faq summary{cursor:pointer;font-weight:600;line-height:1.5}.faq details p{color:var(--muted);padding-top:14px;font-size:.95rem}.site-footer{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:26px;margin-top:40px;padding:38px 0;display:flex}.footer-brand{letter-spacing:-.05em;font-size:1.2rem;font-weight:700}.site-footer p,.copyright{color:var(--muted);margin-top:8px;font-size:.8rem}.site-footer nav{flex-wrap:wrap;gap:20px;font-size:.8rem;display:flex}.article-page{max-width:780px;padding-bottom:24px}.breadcrumb{color:var(--muted);flex-wrap:wrap;gap:8px;padding-top:24px;font-size:.78rem;display:flex}.breadcrumb a:hover{text-decoration:underline}}@layer components{.field-group{margin-bottom:24px}.field-group>label,.field-heading>label{margin-bottom:10px;font-size:.95rem;font-weight:600;display:block}.field-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:10px;display:flex}.field-heading>label{margin:0}.input-shell{background:var(--soft);border:1px solid #0000;border-radius:12px;align-items:center;gap:12px;min-height:68px;padding:0 18px;display:flex}.input-shell:focus-within{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px #c74b0814}.input-shell input{width:100%;color:var(--ink);background:0 0;border:0;border-radius:2px;padding:14px 0;font-size:1.65rem;font-weight:500;line-height:1.3}.input-shell>span{color:var(--muted);white-space:nowrap;font-size:.9rem}.field-hint{color:var(--muted);margin-top:9px;font-size:.78rem;line-height:1.5}.unit-switch{background:var(--soft);border:0;border-radius:8px;gap:2px;margin:0;padding:3px;display:flex}.unit-switch label{cursor:pointer;position:relative}.unit-switch input{opacity:0;width:1px;height:1px;position:absolute}.unit-switch span{color:var(--muted);border-radius:6px;padding:8px 10px;font-size:.75rem;display:block}.unit-switch input:checked+span{color:var(--ink);background:#fff;font-weight:700;box-shadow:0 1px 4px #00000012}.unit-switch input:focus-visible+span{outline:3px solid var(--accent)}.advanced{border-top:1px solid var(--line);margin-top:28px}.advanced summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;min-height:62px;font-size:.83rem;font-weight:600;list-style:none;display:flex}.advanced summary::-webkit-details-marker{display:none}.advanced summary span{color:var(--muted);font-size:1.35rem}.advanced[open] summary span{transform:rotate(45deg)}.advanced-fields{padding-top:8px}.advanced-fields .input-shell{min-height:58px}.advanced-fields .input-shell input{font-size:1.2rem}.form-actions{align-items:center;gap:16px;margin-top:12px;display:flex}.primary-button{background:var(--accent);color:#fff;border-radius:12px;flex:1;justify-content:space-between;align-items:center;gap:20px;min-height:62px;padding:16px 22px;font-weight:600;display:flex}.primary-button:hover{background:#a93e04}.primary-button span{font-size:1.3rem}.reset-button{color:var(--muted);background:0 0;min-height:48px;padding:14px 0;font-size:.78rem}.result-card{background:var(--accent-light);border-radius:var(--radius);padding:36px;scroll-margin-top:20px}.result-eyebrow{color:var(--accent);align-items:center;gap:10px;font-size:.75rem;font-weight:700;display:flex}.result-symbol{background:#ffdbc3;border-radius:50%;place-items:center;width:29px;height:29px;font-size:1.1rem;display:grid}.result-card h2{letter-spacing:-.025em;margin-top:27px;font-size:1.2rem;line-height:1.3}.result-output{margin:10px 0 24px}.result-number{letter-spacing:-.07em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere;font-size:clamp(3.8rem,6vw,5.2rem);font-weight:600;line-height:1.15}.result-unit{color:var(--accent);white-space:nowrap;margin-left:10px;font-size:1.3rem;font-weight:500}.result-secondary{color:#805332;min-height:26px;margin-top:4px;font-size:.9rem}.energy-meter{gap:7px;height:28px;margin-bottom:28px;display:flex}.energy-meter span{background:#f0b78e;border-radius:4px;flex:1}.energy-meter span:nth-child(-n+8){background:var(--accent)}.energy-meter span:last-child{background:#f6d8c4}.result-details{border-top:1px solid #eacbb7;border-bottom:1px solid #eacbb7;flex-direction:column;gap:15px;margin:0;padding:22px 0;display:flex}.result-details>div{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.result-details dt{color:#805332;font-size:.82rem}.result-details dd{white-space:nowrap;margin:0;font-size:.95rem;font-weight:600}.result-note{color:#805332;margin-top:22px;font-size:.78rem;line-height:1.6}.compatibility-note{color:var(--muted);padding:18px 8px 0;font-size:.75rem;line-height:1.6}.form-error,.noscript{color:#9f201b;background:#fff1f0;border-radius:10px;margin:12px 0;padding:14px;font-size:.85rem;line-height:1.5}.device-row{background:var(--soft);border-radius:14px;margin-bottom:12px;padding:16px}.device-top{align-items:center;gap:8px;margin-bottom:14px;display:flex}.device-name{background:0 0;border:0;width:100%;padding:6px 0;font-size:.95rem;font-weight:600}.remove-device{min-width:44px;min-height:44px;color:var(--muted);background:#fff;border-radius:8px;font-size:1.5rem}.device-numbers{grid-template-columns:1.1fr .8fr 1fr;gap:10px;display:grid}.device-numbers label{color:var(--muted);margin-bottom:7px;font-size:.68rem;line-height:1.3;display:block}.device-numbers input{border:1px solid var(--line);background:#fff;border-radius:8px;width:100%;min-height:50px;padding:12px 10px;font-size:1.1rem}.add-device{width:100%;color:var(--ink);background:#fff;border:1px dashed #aeb4ba;border-radius:12px;min-height:54px;padding:14px;font-size:.85rem;font-weight:600}.devices-field{margin-bottom:26px}.ad-slot{display:none}.ad-slot[data-enabled=true]{border:1px solid var(--line);text-align:center;min-height:100px;margin:24px auto;padding:14px;display:block}.ad-label{color:var(--muted);font-size:.7rem}}@media (width<=760px){:root{font-size:18px}.wrap{width:calc(100% - 36px)}.site-header{height:78px}.brand{font-size:1.4rem}.brand-mark{border-radius:8px;width:31px;height:31px}.desktop-link{display:none}.page-heading{padding:29px 0 23px}.page-heading h1{max-width:620px;font-size:2.15rem;line-height:1.08}.page-heading p{margin-top:14px;font-size:.9rem;line-height:1.55}.eyebrow{letter-spacing:.04em;margin-bottom:12px;font-size:.65rem}.calculator-tabs{gap:6px;margin-bottom:18px}.calculator-tabs a{text-align:center;border-radius:11px;flex:1;justify-content:center;align-items:center;min-height:45px;padding:12px 9px;font-size:.73rem;line-height:1.35;display:flex}.calculator-grid{grid-template-columns:1fr;gap:18px}.calculator-form{border-radius:20px;padding:22px 18px}.field-group{margin-bottom:22px}.field-group>label,.field-heading>label{font-size:.9rem}.input-shell{min-height:64px;padding:0 16px}.input-shell input{font-size:1.55rem}.field-hint{font-size:.78rem}.unit-switch span{padding:8px 9px}.advanced{margin-top:22px}.advanced summary{font-size:.8rem}.form-actions{gap:15px}.primary-button{min-height:60px;padding:15px 18px}.result-column{position:static}.result-card{border-radius:20px;padding:28px 24px}.result-card h2{margin-top:23px}.result-number{font-size:4.25rem}.result-unit{font-size:1.1rem}.compatibility-note{padding-inline:4px;font-size:.78rem}.calculator{margin-bottom:30px}.content-section{padding:30px 0}.section-heading{font-size:1.45rem}.card-grid{grid-template-columns:1fr;gap:12px}.tool-card{grid-template-columns:28px 1fr;column-gap:14px;padding:22px;display:grid}.tool-card .tool-number{grid-row:1/3;margin:4px 0 0}.tool-card h3{margin-bottom:8px;font-size:1.12rem}.tool-card p{font-size:.82rem}.editorial h2{font-size:1.4rem}.editorial p,.editorial ul{font-size:.9rem}.formula{padding:18px;font-size:.87rem}.faq summary{font-size:.93rem}.faq details p{font-size:.85rem}.site-footer{flex-direction:column;align-items:flex-start;gap:23px;margin-top:20px;padding:30px 0}.site-footer nav{gap:15px 20px;line-height:1.5}.copyright{margin:0}.breadcrumb{padding-top:18px;font-size:.72rem}.device-numbers label{font-size:.78rem}.device-numbers{gap:8px}.device-row{padding:13px}.device-numbers input{padding:10px 8px}.energy-meter{gap:6px}}@media (width<=370px){.wrap{width:calc(100% - 28px)}.page-heading h1{font-size:1.95rem}.calculator-form{padding:20px 14px}.field-heading{align-items:flex-start}.field-heading>label{flex-basis:100%}.calculator-tabs a{padding:10px 6px;font-size:.7rem}.device-numbers{grid-template-columns:1fr 1fr}.device-numbers>div:last-child{grid-column:1/3}.result-number{font-size:3.5rem}}.form-actions{flex-wrap:wrap}.primary-button{flex-basis:200px;min-width:0}.editorial a{overflow-wrap:anywhere}.result-details>div{flex-wrap:wrap}.input-shell>span{white-space:normal;overflow-wrap:anywhere;max-width:45%}.device-numbers>div,.calculator-grid>*{min-width:0}.calculator-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}h1,h2,h3,.primary-button{overflow-wrap:anywhere}.primary-button{gap:10px}.primary-button>span{flex-shrink:0}.input-shell input{flex:1;width:0}.input-shell>span{white-space:nowrap;flex-shrink:0;max-width:none}.calculator-tabs a{text-align:center;justify-content:center;align-items:center;line-height:1.25;display:flex}.result-number{letter-spacing:0;font-kerning:none}.device-numbers{align-items:stretch}.device-numbers>div{grid-template-rows:1fr auto;display:grid}.device-numbers label,.device-numbers input{align-self:end}.error-page{flex-direction:column;min-height:100svh;display:flex}.error-main{flex:1;align-items:center;padding-block:56px;display:flex}.error-content{max-width:740px}.error-code{letter-spacing:-.05em;margin-bottom:28px;font-size:clamp(5rem,16vw,9rem);font-weight:700;line-height:1}.error-code span{color:var(--accent)}.error-content h1{margin-bottom:20px;font-size:clamp(1.8rem,4vw,3rem)}.error-description{max-width:600px;color:var(--muted)}.error-english{border-top:1px solid var(--line);max-width:600px;margin-top:28px;padding-top:24px}.error-english h2{margin-bottom:10px;font-size:1.15rem}.error-english p{color:var(--muted);font-size:.9rem}.error-actions{flex-wrap:wrap;gap:14px;margin-top:32px;display:flex}.error-actions .primary-button{flex:0 auto;justify-content:center}.secondary-button{border:1px solid var(--line);background:var(--soft);text-align:center;border-radius:12px;justify-content:center;align-items:center;min-height:62px;padding:16px 22px;font-size:.95rem;font-weight:600;display:flex}.secondary-button:hover{background:#e9ebed}.error-footer{border-top:1px solid var(--line);color:var(--muted);padding-block:24px;font-size:.8rem}@media (width<=760px){.error-main{padding-block:36px}.error-actions{flex-direction:column}.error-actions a{overflow-wrap:anywhere;width:100%;min-width:0}.error-description{font-size:.95rem}.error-code{margin-bottom:22px}.calculator-grid{grid-template-columns:minmax(0,1fr)}.site-header{flex-wrap:wrap;gap:12px;height:auto;min-height:78px;padding-block:18px}.advanced summary{overflow-wrap:anywhere}.unit-switch{flex-wrap:wrap;max-width:100%}.result-number{overflow-wrap:anywhere}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}