:root{--blue:#0A2E52;--blue2:#0B3C6C;--blue3:#082544;--cyan:#9FD0FF;--cyan2:#5EA9E6;--paper:#FFFFFF;--paper2:#F4F7FB;--ink:#16283C;--ink2:#3D5269;--mut:#6B7F94;--line:#D7E1EC;--amber:#E8A33D;--amber-d:#C07F1D}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.68;font-size:16.5px}
a{color:#0B5FA5;text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.num{font-variant-numeric:tabular-nums}
/* header */
header.site{position:sticky;top:0;z-index:50;background:var(--blue3);color:#fff;border-bottom:3px solid var(--amber)}
header.site .bar{display:flex;align-items:center;gap:18px;padding:11px 0}
.logo{font-weight:800;font-size:19px;color:#fff;line-height:1.15;letter-spacing:.01em}
.logo b{color:var(--cyan)}
.logo small{display:block;font-weight:500;font-size:10.5px;color:#A9C6DE;letter-spacing:.07em;margin-top:2px}
nav.main{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap;align-items:center}
nav.main>div{position:relative}
nav.main a.nl{color:#DCEBF7;padding:9px 10px;display:inline-block;font-size:14px;font-weight:600;white-space:nowrap}
nav.main a.nl:hover{color:#fff;text-decoration:none}
nav.main .menu{display:none;position:absolute;top:100%;left:0;background:#fff;min-width:262px;border:1px solid var(--line);border-top:3px solid var(--amber);box-shadow:0 16px 40px rgba(8,37,68,.25);padding:8px;z-index:60}
nav.main .menu a{display:block;color:var(--ink);padding:8px 10px;font-size:14px;font-weight:500}
nav.main .menu a:hover{background:var(--paper2);text-decoration:none;color:#0B5FA5}
nav.main>div:hover .menu,nav.main>div:focus-within .menu{display:block}
.head-cta{background:var(--amber);color:#231600!important;padding:9px 14px!important;border-radius:6px;margin-left:8px;font-size:14px;font-weight:700}
.head-cta:hover{background:var(--amber-d);color:#fff!important;text-decoration:none}
.burger{display:none;background:none;border:1px solid #3E6184;color:#fff;border-radius:6px;padding:7px 11px;font-size:15px;cursor:pointer}
#navtoggle{display:none}
.mobilenav{display:none}
/* blueprint hero */
.bp{background:linear-gradient(160deg,var(--blue2) 0%,var(--blue) 58%,var(--blue3) 100%);color:#fff;position:relative;overflow:hidden;border-bottom:1px solid var(--blue3)}
.bp::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(159,208,255,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(159,208,255,.13) 1px,transparent 1px);background-size:34px 34px;pointer-events:none}
.bp .grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:center;padding:42px 0 38px}
.bp h1{font-size:36px;line-height:1.16;margin:14px 0 14px;letter-spacing:-.01em}
.bp h1 em{font-style:normal;color:var(--cyan)}
.bp p.lead{font-size:17px;color:#C9DEF0;max-width:58ch}
.dwg{display:inline-block;border:1.5px solid var(--cyan);color:var(--cyan);font-family:ui-monospace,Menlo,Consolas,monospace;font-size:11.5px;font-weight:700;letter-spacing:.09em;padding:5px 11px;background:rgba(8,37,68,.45)}
figure.schem{background:rgba(8,37,68,.5);border:1.5px solid rgba(159,208,255,.55);padding:12px 12px 8px}
figure.schem svg{width:100%;height:auto;display:block}
figure.schem figcaption{color:#A9C6DE;font-size:12px;padding:8px 2px 2px;font-family:ui-monospace,Menlo,Consolas,monospace;letter-spacing:.04em}
.ruler{height:14px;background:repeating-linear-gradient(90deg,var(--cyan) 0 1.5px,transparent 1.5px 12px),repeating-linear-gradient(90deg,var(--cyan) 0 1.5px,transparent 1.5px 60px);background-size:100% 6px,100% 14px;background-repeat:no-repeat;background-position:bottom left;opacity:.6;margin-top:16px}
.bp .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.btn{display:inline-block;background:var(--amber);color:#231600;font-weight:700;padding:12px 20px;border-radius:6px;font-size:15px}
.btn:hover{background:var(--amber-d);color:#fff;text-decoration:none}
.btn.ghost{background:transparent;color:var(--cyan);border:1.5px solid var(--cyan)}
.btn.ghost:hover{background:rgba(159,208,255,.12);color:#fff}
.bp .facts{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px}
.bp .facts div{border-left:2px solid var(--amber);padding-left:10px}
.bp .facts b{display:block;font-size:19px;font-family:ui-monospace,Menlo,Consolas,monospace}
.bp .facts span{font-size:12.5px;color:#A9C6DE}
/* body */
main{background:var(--paper)}
section.blk{padding:34px 0 8px}
h2.sec{font-size:25px;margin:0 0 12px;color:var(--ink);letter-spacing:-.01em}
h2.sec .no{color:#0B5FA5;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:15px;vertical-align:middle;margin-right:8px}
h3.sub{font-size:18px;margin:18px 0 8px;color:var(--ink)}
p{margin:0 0 14px;max-width:78ch}
ul.tight{margin:0 0 16px 20px}
ul.tight li{margin-bottom:7px;max-width:74ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:12px 0 10px}
.card{background:var(--paper2);border:1px solid var(--line);border-top:3px solid var(--blue2);padding:16px 16px 14px;display:flex;flex-direction:column}
.card .dwg{border-color:var(--blue2);color:var(--blue2);background:#fff;align-self:flex-start}
.card h3{font-size:16.5px;margin:10px 0 6px}
.card p{font-size:14.5px;color:var(--ink2);margin:0 0 10px}
.card a.more{margin-top:auto;font-weight:600;font-size:14px}
.twrap{overflow-x:auto;margin:8px 0 18px}
table.spec{width:100%;border-collapse:collapse;background:#fff;border:1.5px solid var(--blue2);font-size:15px;min-width:520px}
table.spec th{background:var(--blue2);color:#fff;text-align:left;padding:9px 12px;font-weight:600}
table.spec td{padding:8px 12px;border-top:1px solid var(--line);vertical-align:top}
table.spec td:first-child{font-weight:600;color:var(--blue);white-space:nowrap}
.note{background:var(--paper2);border-left:3px solid var(--amber);padding:12px 16px;margin:14px 0 18px;font-size:15px;color:var(--ink2)}
.note b{color:var(--ink)}
.cta-band{background:var(--blue);color:#fff;padding:30px 0;margin:36px 0 0}
.cta-band h2{font-size:23px;margin-bottom:8px}
.cta-band p{color:#C9DEF0;max-width:70ch}
.cta-band .btn{margin-top:8px}
.faq{border:1px solid var(--line);margin:0 0 12px;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:13px 16px;color:var(--blue)}
.faq .a{padding:0 16px 13px;color:var(--ink2)}
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:10px 0 6px}
.rel a{background:var(--paper2);border:1px solid var(--line);padding:12px 14px;font-weight:600;font-size:14.5px;color:var(--blue);display:block}
.rel a span{display:block;font-weight:400;color:var(--mut);font-size:13px;margin-top:3px}
.rel a:hover{border-color:var(--cyan2);text-decoration:none}
/* forms */
form.qf{background:var(--paper2);border:1px solid var(--line);padding:22px;margin:14px 0 20px}
form.qf .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form.qf label{display:block;font-size:13.5px;font-weight:600;margin:0 0 5px;color:var(--blue)}
form.qf input,form.qf select,form.qf textarea{width:100%;padding:10px 11px;border:1px solid #B9C9D9;border-radius:5px;font-size:15px;font-family:inherit;background:#fff;margin-bottom:13px}
form.qf button{background:var(--amber);border:0;color:#231600;font-weight:700;padding:13px 24px;border-radius:6px;font-size:15.5px;cursor:pointer}
form.qf button:hover{background:var(--amber-d);color:#fff}
/* calculator */
.calc{background:var(--blue);color:#fff;padding:20px;margin:16px 0 20px;border:1.5px solid var(--blue3)}
.calc h3{color:#fff;margin:0 0 6px;font-size:18px}
.calc p{color:#C9DEF0;font-size:14.5px}
.calc .row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:10px}
.calc label{font-size:12.5px;font-weight:600;color:var(--cyan);display:block;margin-bottom:4px}
.calc input,.calc select{width:100%;padding:9px;border:1px solid #3E6184;border-radius:4px;background:#fff;font-size:15px}
.calc .out{margin-top:14px;background:rgba(8,37,68,.6);border:1px solid rgba(159,208,255,.5);padding:12px 14px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:15px}
.calc .out b{color:var(--amber);font-size:19px}
/* footer */
footer.site{background:var(--blue3);color:#C9DEF0;margin-top:44px}
footer.site .cols{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:26px;padding:34px 0 8px}
footer.site h4{color:#fff;font-size:15px;margin-bottom:10px}
footer.site a{color:#C9DEF0;font-size:14px;display:block;margin-bottom:6px}
footer.site p{font-size:14px;max-width:44ch}
footer .titleblock{border-top:1px solid #2A4E73;margin-top:16px;padding:14px 0 20px;display:flex;gap:18px;flex-wrap:wrap;align-items:center;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;color:#A9C6DE}
footer .titleblock .dwg{margin-left:auto}
/* blog */
.post-meta{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px;color:var(--mut);letter-spacing:.05em;margin-bottom:8px}
article.post p{max-width:76ch}
article.post h2{font-size:22px;margin:24px 0 10px}
article.post h3{font-size:17.5px;margin:18px 0 8px}
/* animations */
@keyframes moveParcel{0%{transform:translateX(-30px)}100%{transform:translateX(330px)}}
@keyframes sweep{0%{transform:translateX(0);opacity:0}12%{opacity:.9}88%{opacity:.9}100%{transform:translateX(300px);opacity:0}}
.anim-parcel{animation:moveParcel 7s linear infinite}
.anim-sweep{animation:sweep 7s linear infinite}
@media (max-width:900px){
 .bp .grid{grid-template-columns:1fr;padding:34px 0 30px}
 .bp h1{font-size:30px}
 .cards,.rel{grid-template-columns:1fr 1fr}
 footer.site .cols{grid-template-columns:1fr 1fr}
 .calc .row{grid-template-columns:1fr 1fr}
 nav.main{display:none}
 .burger{display:block;margin-left:auto}
 .mobilenav{background:var(--blue3);padding:6px 0 14px}
 #navtoggle:checked~.mobilenav{display:block}
 .mobilenav a{display:block;color:#DCEBF7;padding:8px 22px;font-size:15px;font-weight:600}
 .mobilenav a.sub{padding-left:38px;font-weight:400;font-size:14px;color:#A9C6DE}
 form.qf .row{grid-template-columns:1fr}
}
@media (max-width:520px){
 .cards,.rel{grid-template-columns:1fr}
 body{font-size:16px}
 .bp h1{font-size:26px}
 footer.site .cols{grid-template-columns:1fr}
}