.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}
header>.site-links{gap:22px}header>.site-links>a{display:inline-flex;align-items:center;gap:6px;height:var(--shell-height,72px);padding:0 1px;border-bottom:3px solid transparent;text-decoration:none;color:var(--text-secondary,#475569);font-size:12px;font-weight:600;white-space:nowrap}
header>.site-links>a:hover{color:var(--brand,#0369a1)}header>.site-links>a[aria-current]{color:var(--brand,#0369a1);border-bottom-color:var(--brand,#0369a1)}header>.site-links .tool-icon{width:17px;height:17px}.site-links>a>span[aria-hidden]{font-size:11px;color:var(--muted,#64748b)}
.portal{background:var(--canvas,#f8fafc);color:var(--text,#334155)}.portal header{border-bottom:1px solid var(--line,#e2e8f0)}.portal .portal-main{max-width:1180px;margin:0 auto;padding:54px 30px 0}.portal h1,.portal h2,.portal h3{color:var(--ink,#0c4a6e)}
.portal-actions{gap:8px;padding:4px 6px}.portal-languages{display:flex;gap:2px;align-items:center;border-right:1px solid var(--line,#e2e8f0);padding-right:8px}.portal-languages a{font-size:11px;padding:5px 6px;text-decoration:none;border-radius:4px;color:var(--muted,#64748b)}.portal-languages a[aria-current]{color:var(--brand,#0369a1);background:var(--tint,#f0f9ff);font-weight:700}.portal-account{display:flex;gap:7px;align-items:center;padding:5px 7px;font-size:12px;font-weight:600;color:var(--brand,#0369a1);text-decoration:none;white-space:nowrap}.portal-account .tool-icon{width:17px;height:17px}
.portal-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:center;gap:54px;padding:30px 0 58px}.portal-kicker{font-size:10px;letter-spacing:.15em;font-weight:700;color:var(--brand,#0369a1);line-height:1.6;margin:0 0 14px}.portal h1{display:block;font-size:clamp(32px,3.4vw,46px);letter-spacing:-1.5px;line-height:1.2;margin:0 0 20px;font-weight:700}.portal h1 span{color:var(--brand,#0369a1)}.hero-description{max-width:510px;color:var(--muted,#64748b);font-size:15px;line-height:1.85;margin:0}.portal-cta{display:flex;align-items:center;flex-wrap:wrap;gap:20px;margin-top:27px}.portal-primary{display:inline-flex;align-items:center;justify-content:center;gap:18px;padding:13px 18px;border:1px solid var(--brand,#0369a1);border-radius:7px;color:var(--surface,#fff);background:var(--brand,#0369a1);text-decoration:none;font-size:13px;font-weight:700;line-height:1.5}.portal-primary:hover{box-shadow:0 4px 18px #0ea5e926}.portal-text-link{color:var(--brand,#0369a1);font-size:12px;font-weight:600;text-decoration:none;line-height:1.6}.portal-text-link:hover{text-decoration:underline;text-underline-offset:4px}.hero-facts{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:24px;color:var(--muted,#64748b);font-size:11px}.hero-facts span{display:flex;align-items:center;gap:6px}.hero-facts i,.diagram-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--sky,#0ea5e9)}
.hero-diagram{position:relative;border:1px solid var(--sky-soft,#bae6fd);border-radius:16px;overflow:hidden;background:radial-gradient(ellipse at 0 0,var(--tint,#f0f9ff),transparent 70%),var(--surface,#fff);box-shadow:0 16px 40px #0369a108;padding:22px}.diagram-heading{display:flex;align-items:center;gap:7px;font-size:9px;color:var(--muted,#64748b);font-weight:600;letter-spacing:.12em}.diagram-mark{margin-left:auto;color:var(--brand,#0369a1)}.diagram-path{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:29px 2px}.diagram-path>a{position:relative;display:flex;gap:9px;align-items:center;min-height:82px;border:1px solid var(--line-soft,#e0f2fe);background:var(--surface,#fff);border-radius:8px;padding:10px;text-decoration:none;color:var(--ink,#0c4a6e);font-size:12px;font-weight:600}.diagram-path>a:hover{border-color:var(--brand,#0369a1)}.diagram-icon{display:grid;place-items:center;flex-shrink:0;width:36px;height:42px;border-radius:6px;background:var(--tint,#f0f9ff);color:var(--brand,#0369a1)}.diagram-icon .tool-icon{width:24px;height:24px}.diagram-path small{position:absolute;right:8px;top:5px;font-size:8px;font-weight:400;color:var(--subtle,#94a3b8)}.diagram-caption{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line-soft,#e0f2fe);padding-top:16px;font-size:10px;color:var(--muted,#64748b)}.diagram-caption>span:first-child{font-size:13px;font-family:monospace;color:var(--brand,#0369a1)}
.portal-section{margin:0 0 45px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 0 20px}.section-heading h2,.guide-content h2{font-size:22px;line-height:1.4;letter-spacing:-.4px;margin:0}.section-heading .portal-kicker{margin:0 0 7px}.section-heading p:not(.portal-kicker){font-size:13px;color:var(--muted,#64748b);margin:7px 0 0}.discipline-cards{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:16px}.discipline-card{position:relative;display:flex;align-items:flex-start;gap:14px;padding:23px 20px;border:1px solid var(--line,#e2e8f0);border-radius:9px;background:var(--surface,#fff);text-decoration:none;min-width:0}.discipline-card>.tool-icon{color:var(--brand,#0369a1);width:26px;height:26px;margin-top:29px;flex-shrink:0}.discipline-card h3{font-size:21px;margin:6px 0 8px}.discipline-card p{font-size:12px;line-height:1.7;color:var(--muted,#64748b);margin:0}.card-tag{font-size:9px;text-transform:uppercase;letter-spacing:.08em;font-weight:700;color:var(--muted,#64748b)}.is-available{background:var(--tint,#f0f9ff);border-color:var(--sky-soft,#bae6fd)}.is-available .card-tag,.is-available h3{color:var(--brand,#0369a1)}.coming-soon{background:transparent}.coming-soon h3,.coming-soon>.tool-icon{color:var(--muted,#64748b)}.card-arrow{flex-shrink:0;font-size:17px;color:var(--brand,#0369a1);margin-left:auto}.discipline-card>.card-arrow{position:absolute;top:15px;right:18px}.tool-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.tool-card{display:flex;align-items:flex-start;gap:14px;padding:23px 20px;min-width:0;background:var(--surface,#fff);border:1px solid var(--line,#e2e8f0);border-radius:9px;text-decoration:none;transition:border-color .15s,box-shadow .15s}.tool-card:hover{border-color:var(--sky,#0ea5e9);box-shadow:0 4px 20px #0369a108}.tool-card-icon{display:grid;place-items:center;flex-shrink:0;width:39px;height:42px;background:var(--tint,#f0f9ff);border-radius:7px;color:var(--brand,#0369a1)}.tool-card-icon .tool-icon{width:23px;height:23px}.tool-card h3{font-size:14px;line-height:1.5;margin:0 0 7px}.tool-card p{font-size:12px;line-height:1.75;margin:0;color:var(--muted,#64748b)}.tool-count{font-size:11px;color:var(--muted,#64748b);white-space:nowrap}.tool-card-copy{min-width:0}
.electrical-hero{padding-bottom:46px}.workflow-card{padding:24px;border-radius:12px;border:1px solid var(--line-soft,#e0f2fe);background:var(--surface,#fff)}.workflow-card>a{display:flex;align-items:center;gap:12px;padding:12px 0;text-decoration:none;font-size:13px;color:var(--text-secondary,#475569);border-bottom:1px solid var(--line-soft,#e0f2fe)}.workflow-card>a:last-child{border:0;padding-bottom:0}.workflow-card>a>span:last-child{margin-left:auto;color:var(--brand,#0369a1)}.workflow-card>a:hover{color:var(--brand,#0369a1)}.workflow-number{display:grid;place-items:center;width:29px;height:29px;flex-shrink:0;border-radius:50%;background:var(--tint,#f0f9ff);color:var(--brand,#0369a1);font-size:10px;font-weight:700}
.portal-notice{display:flex;align-items:flex-start;gap:12px;margin:18px 0 32px;padding:18px 20px;border:1px solid var(--line,#e2e8f0);border-radius:7px;color:var(--muted,#64748b);background:transparent}.portal-notice .tool-icon{flex-shrink:0;width:18px;height:18px}.portal-notice p{font-size:11px;line-height:1.8;margin:0}.portal-footer{max-width:1120px;margin:0 auto;padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted,#64748b);font-size:11px}.portal-footer nav{display:flex;gap:22px;flex-wrap:wrap}.portal-footer a{text-decoration:none}.portal-footer a:hover{color:var(--brand,#0369a1)}
.guide-hero{padding:24px 0 40px;max-width:850px}.guide-hero h1{font-size:35px;letter-spacing:-.8px}.guide-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:40px}.guide-index{align-self:start;position:sticky;top:100px;display:flex;flex-direction:column;gap:12px;border-left:2px solid var(--line-soft,#e0f2fe);padding-left:18px}.guide-index .portal-kicker{margin-bottom:4px}.guide-index a{font-size:12px;line-height:1.7;color:var(--muted,#64748b);text-decoration:none}.guide-index a:hover{color:var(--brand,#0369a1)}.guide-content{min-width:0}.guide-content section{scroll-margin-top:100px;margin-bottom:40px;padding-bottom:30px;border-bottom:1px solid var(--line,#e2e8f0)}.guide-content p,.project-instructions{font-size:13px;line-height:1.9;color:var(--muted,#64748b)}.guide-content h3{font-size:14px;line-height:1.5;margin:0 0 7px}.guide-content h3 a{text-decoration:none}.guide-steps{display:grid;gap:10px;margin-top:20px}.guide-steps article{display:flex;gap:14px;align-items:flex-start;background:var(--surface,#fff);border:1px solid var(--line,#e2e8f0);border-radius:8px;padding:17px}.guide-steps article p{margin:0}.guide-tips{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}.guide-tips article{padding:20px;background:var(--surface,#fff);border:1px solid var(--line,#e2e8f0);border-radius:8px}.guide-tips p{margin:0}.project-instructions{padding-left:22px}.project-instructions li{padding:5px 0 5px 4px}.guide-content details{border-bottom:1px solid var(--line,#e2e8f0);padding:16px 0;font-size:13px}.guide-content details summary{cursor:pointer;color:var(--text-secondary,#475569);font-weight:600}.guide-content details p{margin-bottom:0}.guide-content details a{color:var(--brand,#0369a1)}
@media(min-width:701px) and (max-width:1000px){header>.site-links{gap:14px}header>.brand{width:170px;margin-right:0}.brand img{width:170px}.portal-account>span{display:none}.portal-hero{gap:28px}.tool-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.discipline-cards{grid-template-columns:1fr 1fr}.discipline-card:first-child{grid-column:1/-1}.guide-layout{grid-template-columns:170px minmax(0,1fr);gap:24px}}
@media(max-width:700px){header>.site-links{height:auto;gap:3px;padding:8px;background:var(--surface,#fff)}header>.site-links>a,header>.site-links #electrical-menu{height:auto;min-height:44px;width:100%;padding:10px 12px;justify-content:flex-start;border:0;border-radius:5px;font-size:13px}header>.site-links>a[aria-current]{background:var(--tint,#f0f9ff)}#discipline-toggle{color:var(--brand,#0369a1)}.portal-actions{gap:0;padding:3px}.portal-languages{border:0;padding:0}.portal-languages a{padding:5px 4px;font-size:10px}.portal-account{padding:5px 6px}.portal-account>span{display:none}.portal .portal-main{padding:24px 18px 0}.portal-hero{grid-template-columns:1fr;gap:26px;padding:12px 0 36px}.portal h1{font-size:34px;letter-spacing:-1px}.hero-description{font-size:14px;line-height:1.8}.portal-cta{gap:17px;margin-top:22px}.portal-primary{font-size:12px;padding:12px 15px}.hero-facts{font-size:10px;gap:13px;margin-top:19px}.hero-diagram{padding:18px}.diagram-path{padding:22px 0;gap:12px}.diagram-path>a{font-size:11px;gap:7px;padding:9px}.diagram-icon{width:29px;height:36px}.diagram-icon .tool-icon{width:20px;height:20px}.diagram-caption{font-size:9px}.diagram-caption>span:first-child{font-size:11px}.section-heading{align-items:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:17px}.section-heading h2,.guide-content h2{font-size:20px}.section-heading .portal-text-link{font-size:11px}.portal-section{margin-bottom:32px}.discipline-cards,.tool-cards{grid-template-columns:1fr;gap:12px}.discipline-card{padding:20px}.tool-card{padding:20px}.discipline-card h3{font-size:20px}.coming-soon{padding:17px 20px}.coming-soon>.tool-icon{margin-top:20px}.coming-soon h3{font-size:17px;margin-bottom:4px}.portal-notice{padding:16px;margin-bottom:22px}.portal-footer{margin:0 18px;padding-bottom:24px;font-size:10px;gap:16px;flex-wrap:wrap}.portal-footer nav{gap:17px}.guide-hero{padding:8px 0 26px}.guide-hero h1{font-size:30px}.guide-layout{grid-template-columns:1fr;gap:24px}.guide-index{position:static;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:14px;background:var(--tint,#f0f9ff);border:0;border-radius:7px}.guide-index .portal-kicker{grid-column:1/-1}.guide-index a{font-size:11px}.guide-tips{grid-template-columns:1fr;gap:12px}.guide-content section{margin-bottom:28px;padding-bottom:22px}.workflow-card{padding:20px}.portal-kicker{font-size:9px}}
@media(prefers-reduced-motion:reduce){.tool-card{transition:none}}
@media(min-width:701px){.circuit-tools{grid-template-columns:repeat(2,minmax(0,1fr))}}
header>.site-links>.site-home-link{justify-content:center;min-width:34px;padding-left:7px;padding-right:7px}
.breadcrumb-home{display:inline-flex;align-items:center;justify-content:center;min-width:26px;min-height:26px;color:var(--brand,#0369a1);border-radius:4px;text-decoration:none}.breadcrumb-home .tool-icon{width:17px;height:17px}.breadcrumb-home:hover{background:var(--tint,#f0f9ff)}
@media(max-width:700px){header>.site-links>.site-home-link{justify-content:flex-start;padding-left:12px}}