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@media(max-width:620px){.condition-grid,.roof-process,.map-layout{grid-template-columns:1fr;gap:30px}.condition-grid article{padding-top:24px}.condition-grid h3{font-size:27px}.scope-ledger>div{grid-template-columns:1fr;gap:12px;padding:25px 0}.scope-ledger dt{font-size:25px}.roof-process li{padding:0 0 0 65px}.roof-process h3{font-size:25px}.map-layout iframe{height:310px}.header-inner{gap:0}.header-inner nav{font-size:17px;gap:0}}
.map-layout img{height:auto;aspect-ratio:700/520;border-radius:12px}.editorial-hero{padding-block:62px;background:var(--paper)}.editorial-hero h1{font-size:50px;max-width:24ch;line-height:1.1}.editorial-hero nav{font-size:17px;margin-bottom:24px}.editorial-hero .article-date{font-size:16px;color:var(--muted)}.article-hero-photo{margin-top:35px}.article-hero-photo img{height:360px;border-radius:12px}.section-article-cta{background:var(--ink);color:white}.section-article-cta p{color:#e0ebf2}.section-article-cta .button{margin-top:12px}.ks-blog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:45px;margin-top:36px}.ks-blog-grid [data-blog-card]{display:flex;flex-direction:column;gap:25px}.ks-blog-grid img{width:100%;height:280px;border-radius:12px}.ks-blog-grid h3{font-size:30px}.ks-blog-grid h3 a{text-decoration:none}.ks-blog-grid .blog-date{font-size:15px;color:var(--muted);margin-bottom:15px}.ks-blog-grid .button{font-size:17px;margin-top:12px}.collection-actions{margin-top:40px}.blog-pagination{display:flex;align-items:center;gap:20px;margin-top:35px}.blog-pagination[hidden]{display:none}.storm-filters{display:grid;grid-template-columns:1fr 1.2fr 1fr auto;gap:22px;align-items:end;margin-bottom:27px;padding:28px;background:var(--paper);border-radius:12px}.storm-filters label{font-size:16px;font-weight:650}.storm-filters select{display:block;width:100%;margin-top:7px;background:white;color:var(--ink);border:1px solid #99afbd;min-height:48px;padding:10px;border-radius:5px;font-size:17px}.storm-filters .reset-button{padding:12px 0}.storm-table{width:100%;border-collapse:collapse;font-size:17px}.storm-table caption{text-align:left;color:var(--muted);font-size:15px;margin-bottom:20px}.storm-table th,.storm-table td{text-align:left;vertical-align:top;padding:20px 15px;border-bottom:1px solid var(--line);font-weight:400}.storm-table thead th{background:var(--paper);font-size:16px;font-weight:750}.storm-table tbody th{width:18%;font-weight:700}.storm-table strong,.storm-table small{display:block;margin-top:6px}.storm-table small{font-size:15px;color:var(--muted)}.storm-table td:nth-child(2){width:24%}.storm-table td:nth-child(3){width:35%}.storm-table a{font-weight:650}.storm-table [hidden],[data-storm-empty][hidden]{display:none!important}.reading p{max-width:74ch}
@media(min-width:851px){.header-inner nav{gap:13px;font-size:15px}.header-inner{gap:18px}.header-actions{gap:12px}.header-phone{font-size:16px}.header-cta{font-size:14px;padding-inline:12px}}
@media(max-width:850px){.storm-filters{grid-template-columns:1fr 1fr}.storm-table th,.storm-table td{padding-inline:10px}}
@media(max-width:620px){.editorial-hero{padding-block:38px}.editorial-hero h1{font-size:39px}.article-hero-photo img{height:235px}.ks-blog-grid{grid-template-columns:1fr;gap:42px}.ks-blog-grid img{height:230px}.ks-blog-grid h3{font-size:29px}.storm-filters{grid-template-columns:1fr;gap:19px;padding:23px}.storm-table thead{display:none}.storm-table tbody tr{display:grid;grid-template-columns:1fr;border-top:1px solid var(--line);padding:22px 0;gap:14px}.storm-table th,.storm-table td,.storm-table tbody th,.storm-table td:nth-child(2),.storm-table td:nth-child(3){width:100%;padding:0;border:0}.storm-table tbody th{font-size:21px}.storm-table td:before{content:attr(data-label);display:block;font-size:14px;font-weight:750;margin-bottom:4px}.storm-table strong{display:inline;font-size:18px;margin-left:8px}.storm-table small{margin-top:4px}}

/* September 21 depth revision: developed service explanations and recomposed text sections */
.service-groups{border-bottom:2px solid var(--ink)}.service-group{display:grid;grid-template-columns:1fr 1.05fr;gap:72px;padding:52px 0;border-top:2px solid var(--ink);align-items:start}.group-story h3{font-size:31px;max-width:20ch}.group-story p{max-width:60ch}.group-routes{list-style:none;margin:0;padding:6px 32px;background:var(--paper);border-radius:var(--radius)}.group-routes li{padding:24px 0;border-top:1px solid var(--line)}.group-routes li:first-child{border-top:0}.group-routes h4{font-size:21px;margin-bottom:8px;letter-spacing:-.015em}.group-routes p{font-size:17px;margin-bottom:10px}
.section-worksheet{background:var(--wash)}.worksheet-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:72px;align-items:start}.worksheet-story h2{max-width:18ch}.worksheet-story figure{margin-top:34px}.worksheet-story img{height:300px;border-radius:var(--radius)}.worksheet-sheet{background:white;border-radius:var(--radius);border-top:6px solid var(--yellow);padding:36px 40px 34px;box-shadow:0 12px 32px #14354a12}.worksheet-sheet h3{font-size:25px;margin-bottom:6px}.worksheet-sheet dl{margin:0}.worksheet-sheet dl>div{padding:22px 0;border-top:1px solid var(--line)}.worksheet-sheet dl>div:first-child{border-top:0}.worksheet-sheet dt{font-size:20px;margin-bottom:8px;letter-spacing:-.01em}.worksheet-sheet dd{margin:0;font-size:17px}.worksheet-sheet .section-after{border-top:1px solid var(--line);padding-top:20px;font-size:16px;color:var(--muted)}
.section-commercial-routes .commercial-systems{display:grid;grid-template-columns:repeat(3,1fr);gap:44px;margin-top:64px;padding-top:44px;border-top:1px solid #4d6a7c}.commercial-systems h3{font-size:24px;margin-bottom:14px}.commercial-systems p{color:#e6eef3;font-size:17px}.commercial-systems .text-link{color:white}
.rail-grid{display:grid;grid-template-columns:.82fr 1.2fr;gap:84px;align-items:start}.rail-lead h2{max-width:17ch}.rail-lead figure{margin-top:32px}.rail-lead img{height:310px;border-radius:var(--radius)}.rail-paper{background:var(--paper)}.rail-wash{background:var(--wash)}.rail-steps{list-style:none;counter-reset:railstep;margin:0;padding:0}.rail-steps li{counter-increment:railstep;position:relative;padding:4px 0 40px 74px}.rail-steps li:last-child{padding-bottom:0}.rail-steps li:before{content:counter(railstep);position:absolute;left:0;top:0;width:46px;height:46px;display:grid;place-items:center;background:var(--yellow);border-radius:50%;font:750 22px/1 var(--display)}.rail-steps li:after{content:'';position:absolute;left:22px;top:54px;bottom:8px;width:2px;background:#9cb6c6}.rail-steps li:last-child:after{display:none}.rail-steps h3{font-size:25px;margin-bottom:12px}.rail-parts{margin:0}.rail-parts>div{padding:28px 0;border-top:1px solid #9cb6c6}.rail-parts>div:first-child{border-top:2px solid var(--ink)}.rail-parts dt{font-size:25px;margin-bottom:12px}.rail-parts dd{margin:0}.rail-body .section-after{margin-top:30px;padding-top:26px;border-top:2px solid var(--ink)}
.contrast-table{border-top:2px solid var(--ink)}.contrast-head,.contrast-row{display:grid;grid-template-columns:.62fr 1fr 1fr;gap:0}.contrast-head>div{padding:15px 24px;font-size:16px;font-weight:750;background:var(--paper)}.contrast-head>div:first-child{background:none;padding-left:0}.contrast-row{border-bottom:1px solid var(--line)}.contrast-row>h3{font-size:23px;margin:0;padding:28px 24px 28px 0}.contrast-row>div{padding:28px 24px}.contrast-row>div:last-child{background:#eef5f9}.contrast-head>div:last-child{background:var(--wash)}.section-contrast .section-after{max-width:74ch;margin-top:30px}
.section-split{padding-block:76px}.split-grid{display:grid;grid-template-columns:.78fr 1.25fr;gap:84px;align-items:start;border-top:2px solid var(--ink);padding-top:48px}.split-head h2{max-width:16ch;margin:0}.split-body p{max-width:68ch}.split-notes{display:grid;grid-template-columns:1fr 1fr;gap:30px 44px;margin:34px 0 0}.split-notes>div{border-top:1px solid var(--line);padding-top:18px}.split-notes dt{font-size:20px;margin-bottom:8px;letter-spacing:-.01em}.split-notes dd{margin:0;font-size:17px}.split-compact{background:var(--paper);padding-block:54px}.split-compact .split-grid{border-top:0;padding-top:0}.split-compact h2{font-size:25px;letter-spacing:-.015em}.split-compact .split-body{font-size:16.5px;color:var(--muted)}.split-compact .split-body a{color:var(--ink)}.resource-intro+.section-split{padding-top:60px}
@media(min-width:851px){.rail-lead{position:sticky;top:132px}}
@media(max-width:1100px){.service-group,.worksheet-grid{gap:44px}.rail-grid,.split-grid{gap:48px}.commercial-systems{gap:30px}}
@media(max-width:850px){.rail-grid,.split-grid,.worksheet-grid,.service-group{grid-template-columns:1fr;gap:32px}.rail-lead img,.worksheet-story img{height:280px}.contrast-head,.contrast-row{grid-template-columns:.7fr 1fr 1fr}.contrast-row>div,.contrast-head>div{padding-inline:16px}.section-commercial-routes .commercial-systems{grid-template-columns:1fr;gap:30px;margin-top:44px;padding-top:34px}}
@media(max-width:620px){.service-group{padding:36px 0;gap:24px}.group-story h3{font-size:27px}.group-routes{padding:2px 22px}.group-routes li{padding:20px 0}.worksheet-sheet{padding:28px 22px 26px}.worksheet-story img,.rail-lead img{height:235px}.rail-lead figure,.worksheet-story figure{margin-top:24px}.rail-steps li{padding:2px 0 30px 60px}.rail-steps li:before{width:40px;height:40px;font-size:20px}.rail-steps li:after{left:19px;top:48px}.rail-steps h3{font-size:23px}.rail-parts>div{padding:24px 0}.rail-parts dt{font-size:24px}.contrast-head{display:none}.contrast-row{grid-template-columns:1fr;padding:24px 0}.contrast-row>h3{padding:0 0 14px;font-size:24px}.contrast-row>div{padding:14px 16px;border-radius:8px}.contrast-row>div+div{margin-top:10px}.contrast-row>div:nth-child(2){background:var(--paper)}.section-split{padding-block:48px}.split-grid{gap:20px;padding-top:32px}.split-notes{grid-template-columns:1fr;gap:22px}.split-compact{padding-block:40px}}

/* Resource introductions: heading and copy paired across the container instead of a floating narrow column */
@media(min-width:851px){.resource-intro .reading{max-width:none;display:grid;grid-template-columns:.78fr 1.25fr;column-gap:84px;align-items:start;border-top:2px solid var(--ink);padding-top:48px}.resource-intro .reading h2{grid-column:1;grid-row:1/span 8;max-width:16ch;margin:0}.resource-intro .reading p{grid-column:2;max-width:68ch}.group-routes{position:sticky;top:132px}}
@media(min-width:851px) and (max-width:1100px){.resource-intro .reading{column-gap:48px}}

.split-notes>div:only-child{grid-column:1/-1}.split-notes-wide{grid-column:1/-1;grid-template-columns:repeat(3,1fr);margin-top:8px}.section-split:not(.split-compact)+:is(.section-ledger,.section-faq,.section-process,.section-contrast),.section-rail:not(.rail-paper):not(.rail-wash)+:is(.section-ledger,.section-process,.section-faq,.section-contrast,.section-split){padding-top:36px}
@media(max-width:850px){.split-notes-wide{grid-template-columns:1fr;margin-top:0}}

.split-grid{row-gap:34px}.split-notes-wide{margin-top:0}

:is(.section-ledger,.section-process,.section-contrast,.section-systems)+.section-split:not(.split-compact),.section-ledger+.section-contrast{padding-top:36px}

/* Header spacing at full desktop width: the 851px compaction rule stays for narrow desktops only. */
@media(min-width:1280px){.header-inner nav{gap:22px;font-size:16px}.header-inner{gap:28px}.header-actions{gap:18px;margin-left:36px}.header-phone{font-size:17px}}
@media(min-width:851px){.nav-disclosure{min-width:26px;padding:10px 3px}}