.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.led-calc-main{padding:28px 0 72px}
.led-calc-hero{position:relative;overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,var(--card),var(--soft));border-radius:30px;padding:32px;box-shadow:var(--shadow);margin-bottom:18px}
.led-calc-hero:after{content:"";position:absolute;width:230px;height:230px;right:-92px;bottom:-128px;border-radius:50%;background:color-mix(in srgb,var(--brand) 13%,transparent);pointer-events:none}
.led-calc-breadcrumbs{position:relative;margin:0 0 18px;font-size:13px;color:var(--muted)}
.led-calc-breadcrumbs ol{display:flex;align-items:center;gap:8px;flex-wrap:wrap;list-style:none;padding:0;margin:0}
.led-calc-breadcrumbs li{display:flex;align-items:center;gap:8px}
.led-calc-breadcrumbs li:not(:last-child):after{content:"→";color:color-mix(in srgb,var(--muted) 65%,transparent)}
.led-calc-breadcrumbs a{text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--brand) 35%,transparent);text-underline-offset:3px}
.led-calc-breadcrumbs a:hover,.led-calc-breadcrumbs a:focus-visible{color:var(--brand-3);outline:none}
.led-calc-eyebrow{color:var(--brand-3);font-size:12px;font-weight:950;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}
html[data-theme="night"] .led-calc-eyebrow{color:var(--brand)}
.led-calc-hero h1{position:relative;font-family:var(--heading-font);font-size:clamp(34px,5vw,48px);line-height:1.04;letter-spacing:-.055em;margin:0 0 12px}
.led-calc-hero>p{position:relative;max-width:900px;margin:0;color:var(--muted);font-size:17px;line-height:1.6}
.led-calc-nav{position:relative;display:flex;gap:8px;flex-wrap:wrap;margin-top:22px;scrollbar-width:none}
.led-calc-nav::-webkit-scrollbar{display:none}
.led-calc-nav a{display:inline-flex;align-items:center;min-height:42px;padding:0 15px;border:1px solid var(--line);border-radius:999px;background:var(--card);font-weight:850}
.led-calc-nav a:hover,.led-calc-nav a:focus-visible{border-color:var(--brand);color:var(--brand-3);outline:none}
html[data-theme="night"] .led-calc-nav a:hover,html[data-theme="night"] .led-calc-nav a:focus-visible{color:var(--brand)}
.led-calc-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(330px,.65fr);gap:18px;align-items:start}
.led-calc-card{min-width:0;border:1px solid var(--line);border-radius:26px;background:var(--card);padding:26px;box-shadow:0 12px 34px color-mix(in srgb,var(--brand) 7%,transparent);scroll-margin-top:170px}
.led-calc-card-heading{display:flex;align-items:flex-start;gap:14px;margin-bottom:22px}
.led-calc-card-heading h2{font-family:var(--heading-font);font-size:28px;line-height:1.12;letter-spacing:-.04em;margin:1px 0 6px}
.led-calc-card-heading p{color:var(--muted);line-height:1.5;margin:0}
.led-calc-step{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;border-radius:13px;background:linear-gradient(135deg,var(--brand-3),var(--brand-2));color:#fff;font-weight:950;box-shadow:0 9px 20px color-mix(in srgb,var(--brand) 24%,transparent)}
.led-calc-step-muted{background:var(--soft);color:var(--brand-3);box-shadow:none;border:1px solid var(--line)}
html[data-theme="night"] .led-calc-step-muted{color:var(--brand)}
.led-calc-form{margin:0}
.led-calc-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.led-calc-fields-wire{grid-template-columns:repeat(2,minmax(0,1fr))}
.led-calc-field{display:flex;flex-direction:column;gap:8px;min-width:0;font-weight:800}
.led-calc-field>span:first-child{font-size:14px}
.led-calc-field small{color:var(--muted);font-size:12px;font-weight:500;line-height:1.4}
.led-calc-input-wrap{display:flex;align-items:center;min-height:50px;border:1px solid var(--line);border-radius:15px;background:var(--page);overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.led-calc-input-wrap:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 13%,transparent)}
.led-calc-input-wrap input,.led-calc-input-wrap select{min-width:0;width:100%;height:48px;border:0;outline:0;background:transparent;color:var(--text);padding:0 13px}
.led-calc-input-wrap select{cursor:pointer}
.led-calc-input-wrap b{flex:0 0 auto;color:var(--muted);font-size:13px;border-left:1px solid var(--line);padding:5px 12px}
.led-calc-submit{display:inline-flex;align-items:center;justify-content:center;min-height:50px;margin-top:18px;padding:0 22px;border:0;border-radius:16px;color:#fff;font-weight:900;background:linear-gradient(135deg,var(--brand-3),var(--brand-2));box-shadow:0 12px 24px color-mix(in srgb,var(--brand) 22%,transparent)}
.led-calc-submit:hover{filter:brightness(1.04);transform:translateY(-1px)}
.led-calc-submit:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 30%,transparent);outline-offset:3px}
.led-calc-error{margin:14px 0 0;padding:12px 14px;border:1px solid color-mix(in srgb,var(--danger) 35%,var(--line));border-radius:13px;background:color-mix(in srgb,var(--danger) 8%,var(--card));color:var(--danger);font-weight:750;line-height:1.45}
.led-calc-result{margin-top:22px;padding:20px;border:1px solid color-mix(in srgb,var(--brand) 35%,var(--line));border-radius:20px;background:color-mix(in srgb,var(--brand) 7%,var(--card))}
.led-calc-result h3{font-family:var(--heading-font);font-size:21px;margin:0 0 14px}
.led-calc-result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:0}
.led-calc-result-grid>div{padding:13px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.led-calc-result-grid dt{color:var(--muted);font-size:12px;line-height:1.35;margin-bottom:5px}
.led-calc-result-grid dd{font-size:18px;font-weight:900;margin:0;line-height:1.3}
.led-calc-result-grid .led-calc-result-primary{border-color:color-mix(in srgb,var(--brand) 45%,var(--line));background:var(--soft)}
.led-calc-result-note{color:var(--muted);font-size:13px;line-height:1.55;margin:14px 0 0}
.led-calc-reference{position:sticky;top:170px}
.led-calc-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px}
.led-calc-reference table{width:100%;border-collapse:collapse;min-width:350px}
.led-calc-reference th,.led-calc-reference td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line)}
.led-calc-reference th{background:var(--soft);font-size:12px;color:var(--muted)}
.led-calc-reference tbody tr:last-child td{border-bottom:0}
.led-calc-table-pick{min-width:48px;border:1px solid color-mix(in srgb,var(--brand) 30%,var(--line));border-radius:10px;background:var(--soft);color:var(--brand-3);padding:6px 8px;font-weight:900}
.led-calc-table-pick:hover,.led-calc-table-pick:focus-visible{border-color:var(--brand);outline:none}
html[data-theme="night"] .led-calc-table-pick{color:var(--brand)}
.led-calc-hint{color:var(--muted);font-size:12px;line-height:1.5;margin:12px 0 0}
.led-calc-wire{margin-top:18px}
.led-calc-wire-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);gap:24px;align-items:start}
.led-calc-wire .led-calc-result{margin-top:0}
.led-calc-explainer,.led-calc-content,.led-calc-faq{scroll-margin-top:170px;margin-top:18px;border:1px solid var(--line);border-radius:26px;background:var(--card);padding:28px;box-shadow:0 12px 34px color-mix(in srgb,var(--brand) 7%,transparent)}
.led-calc-section-heading{max-width:950px;margin-bottom:22px}
.led-calc-section-heading h2{font-family:var(--heading-font);font-size:clamp(28px,4vw,36px);line-height:1.1;letter-spacing:-.045em;margin:0 0 10px}
.led-calc-section-heading>p{color:var(--muted);font-size:16px;line-height:1.6;margin:0}
.led-calc-formula-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.led-calc-formula-card{position:relative;min-width:0;border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,var(--card),var(--soft));padding:22px}
.led-calc-formula-card h3{font-family:var(--heading-font);font-size:21px;line-height:1.2;margin:0 44px 12px 0}
.led-calc-formula-card p{color:var(--muted);line-height:1.6;margin:13px 0 0}
.led-calc-formula-card p strong{color:var(--text)}
.led-calc-formula-index{position:absolute;right:18px;top:18px;display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:var(--card);border:1px solid var(--line);color:var(--brand-3);font-weight:950}
html[data-theme="night"] .led-calc-formula-index{color:var(--brand)}
.led-calc-formula{overflow-x:auto;border-left:4px solid var(--brand);border-radius:10px;background:var(--card);padding:13px 15px;font-family:"Cascadia Code","SFMono-Regular",Consolas,monospace;font-size:clamp(17px,2.5vw,22px);font-weight:850;white-space:nowrap}
.led-calc-method-notes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px}
.led-calc-method-notes article{border:1px solid var(--line);border-radius:18px;padding:20px}
.led-calc-method-notes h3{font-family:var(--heading-font);font-size:19px;line-height:1.25;margin:0 0 9px}
.led-calc-method-notes p{color:var(--muted);line-height:1.62;margin:0}
.led-calc-guide{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.75fr);gap:24px;align-items:center;margin-top:18px;border:1px solid var(--line);border-radius:26px;background:var(--card);padding:26px}
.led-calc-guide h2{font-family:var(--heading-font);font-size:27px;letter-spacing:-.04em;margin:0 0 12px}
.led-calc-guide p{color:var(--muted);line-height:1.6;margin:0 0 10px}
.led-calc-guide p:last-child{margin-bottom:0}
.led-calc-guide figure{margin:0}
.led-calc-guide img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
.led-calc-guide figcaption{color:var(--muted);font-size:12px;margin-top:8px;text-align:center}
.led-calc-content-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.led-calc-content-grid article{border-top:4px solid color-mix(in srgb,var(--brand) 55%,var(--line));border-radius:18px;background:var(--soft);padding:20px}
.led-calc-content-grid article:last-child:nth-child(odd){grid-column:1/-1}
.led-calc-content-grid h3{font-family:var(--heading-font);font-size:20px;line-height:1.25;margin:0 0 10px}
.led-calc-content-grid p{color:var(--muted);line-height:1.65;margin:0}
.led-calc-faq-list{display:grid;gap:12px}
.led-calc-faq-list article{border:1px solid var(--line);border-radius:18px;padding:20px 22px;background:linear-gradient(135deg,var(--card),color-mix(in srgb,var(--soft) 65%,var(--card)))}
.led-calc-faq-list h3{font-family:var(--heading-font);font-size:19px;line-height:1.3;margin:0 0 8px}
.led-calc-faq-list p{color:var(--muted);line-height:1.62;margin:0}
.led-calc-warning{display:flex;align-items:flex-start;gap:8px;margin-top:18px;border-left:5px solid var(--warning);border-radius:18px;background:color-mix(in srgb,var(--warning) 10%,var(--card));padding:18px 20px;line-height:1.55}
.led-calc-warning strong{flex:0 0 auto}
.led-calc-warning p{margin:0}
.calculator-index-section{border:1px solid var(--line);border-radius:26px;background:var(--card);padding:28px;box-shadow:0 12px 34px color-mix(in srgb,var(--brand) 7%,transparent)}
.calculator-index-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.calculator-index-card{display:grid;grid-template-columns:90px minmax(0,1fr);gap:20px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,var(--card),var(--soft));padding:24px}
.calculator-index-icon{display:grid;place-items:center;width:90px;height:90px;border-radius:24px;background:linear-gradient(135deg,var(--brand-3),var(--brand-2));color:#fff;font-size:22px;font-weight:950;box-shadow:0 14px 28px color-mix(in srgb,var(--brand) 22%,transparent)}
.calculator-index-card h3{font-family:var(--heading-font);font-size:24px;line-height:1.2;margin:0 0 10px}
.calculator-index-card h3 a:hover,.calculator-index-card h3 a:focus-visible{color:var(--brand-3);outline:none}
.calculator-index-card p{color:var(--muted);line-height:1.6;margin:0 0 12px}
.calculator-index-card ul{color:var(--muted);display:grid;gap:6px;margin:0 0 16px;padding-left:20px}
.calculator-index-action{display:inline-flex;align-items:center;min-height:42px;border-radius:13px;background:var(--brand-3);color:#fff;padding:0 15px;font-weight:900}
.calculator-index-action:hover,.calculator-index-action:focus-visible{background:var(--brand);outline:none}
@media(max-width:1050px){.led-calc-grid{grid-template-columns:minmax(0,1fr)}.led-calc-reference{position:static}.led-calc-wire-layout{grid-template-columns:minmax(0,1fr)}.led-calc-wire .led-calc-result{margin-top:0}.led-calc-guide{grid-template-columns:minmax(0,1fr)}}
@media(max-width:760px){.led-calc-main{padding-top:18px}.led-calc-hero{border-radius:24px;padding:22px}.led-calc-breadcrumbs{margin-bottom:15px}.led-calc-breadcrumbs li[aria-current="page"]{width:100%}.led-calc-nav{overflow-x:auto;flex-wrap:nowrap;padding-bottom:3px}.led-calc-nav a{white-space:nowrap}.led-calc-card{padding:20px;border-radius:22px;scroll-margin-top:150px}.led-calc-card-heading h2{font-size:24px}.led-calc-fields,.led-calc-fields-wire{grid-template-columns:1fr}.led-calc-result-grid{grid-template-columns:1fr}.led-calc-explainer,.led-calc-content,.led-calc-faq,.calculator-index-section{padding:21px;border-radius:22px;scroll-margin-top:150px}.led-calc-formula-grid,.led-calc-method-notes,.led-calc-content-grid,.calculator-index-grid{grid-template-columns:1fr}.led-calc-content-grid article:last-child:nth-child(odd){grid-column:auto}.calculator-index-card{grid-template-columns:1fr;padding:20px}.calculator-index-icon{width:72px;height:72px;border-radius:20px}.led-calc-guide{padding:20px;border-radius:22px}.led-calc-warning{display:block}.led-calc-warning strong{display:block;margin-bottom:4px}.led-calc-submit{width:100%}}
@media(max-width:420px){.led-calc-card-heading{gap:10px}.led-calc-step{flex-basis:34px;width:34px;height:34px}.led-calc-card{padding:17px}.led-calc-result{padding:15px}}