:root{--ink:#090b0e;--ink-2:#11151a;--paper:#090b0e;--text:#f1f4f8;--muted:#a8b4c7;--gold:#ffb000;--line:#27303a}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--gold);color:var(--ink);padding:10px 14px;font-weight:800;z-index:3}
.skip-link:focus{top:12px}
.guide-wrap{width:min(100% - 40px,920px);margin:auto}
.site-top{border-bottom:1px solid var(--line);background:rgba(9,11,14,.96);position:sticky;top:0;z-index:2}
.top-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand-logo{display:block;width:180px;height:70px;flex:0 0 auto;background:url('/assets/solarx-academy-logo-variants.webp') center center/100% 300% no-repeat}
.brand{font-size:20px;font-weight:900;text-decoration:none;letter-spacing:-.04em;text-transform:uppercase}
.brand b{color:var(--gold)}
nav{display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end}
nav a{color:var(--muted);font-size:14px;text-decoration:none}
nav a:hover,nav a:focus{color:#fff}
.language-picker{appearance:none;background:#11151a;border:1px solid var(--line);border-radius:999px;color:#dce4ee;font:inherit;font-size:14px;padding:7px 30px 7px 11px;cursor:pointer;background-image:linear-gradient(45deg,transparent 50%,#ffb000 50%),linear-gradient(135deg,#ffb000 50%,transparent 50%);background-position:calc(100% - 16px) 12px,calc(100% - 11px) 12px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.language-picker:hover,.language-picker:focus{border-color:var(--gold);color:#fff;outline:none}
.language-picker option{background:#11151a;color:#f1f4f8}
.guide-article{padding:36px 0 90px}
.breadcrumbs{color:var(--muted);font-size:14px;margin:0 0 52px}
.breadcrumbs a{color:#d7dfeb}
.guide-header{max-width:760px;padding-bottom:36px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--gold);font-size:13px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;margin:0 0 12px}
h1,h2{letter-spacing:-.04em;line-height:1.08}
h1{font-size:clamp(38px,7vw,70px);margin:0 0 22px;max-width:820px}
h2{font-size:clamp(27px,4vw,42px);margin:0 0 16px}
p{max-width:740px}
.lead{font-size:21px;line-height:1.5;color:#dce4ee;margin:0 0 20px}
.byline{font-size:14px;color:var(--muted);margin:0}
.guide-article>section{max-width:760px;padding:44px 0;border-bottom:1px solid var(--line)}
.guide-article>section p:last-child{margin-bottom:0}
.guide-article li{margin:10px 0;padding-left:4px}
.guide-article li::marker{color:var(--gold)}
.guide-article ol li::marker{font-weight:900}
.guide-cta{background:var(--ink-2);border:1px solid var(--line);padding:34px;border-radius:12px;margin-top:44px}
.guide-cta h2{font-size:clamp(28px,4vw,42px)}
.guide-cta p{color:var(--muted)}
.button{display:inline-block;background:var(--gold);color:var(--ink);font-weight:900;text-decoration:none;border-radius:999px;padding:13px 20px;margin-top:8px}
.related{border-bottom:0!important;max-width:none!important}
.related-grid,.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.related-card{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);padding:18px;border-radius:8px;text-decoration:none;background:#0d1116}
.related-card:hover,.related-card:focus{border-color:var(--gold)}
.related-card strong{color:#fff}
.related-card span{color:var(--muted);font-size:15px}
.site-footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
.site-footer p{margin:0}
.site-footer a{color:#d7dfeb}
.back-float{position:fixed;right:20px;bottom:20px;z-index:10;display:inline-flex;align-items:center;gap:8px;background:var(--gold);color:var(--ink);font-weight:900;text-decoration:none;border-radius:999px;padding:13px 18px;box-shadow:0 10px 28px rgba(0,0,0,.35);transition:transform .18s ease,box-shadow .18s ease}
.back-float:hover,.back-float:focus-visible{color:var(--ink);transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.45)}
@media(max-width:680px){.guide-wrap{width:min(100% - 28px,620px)}.top-inner{align-items:flex-start;flex-direction:column;padding:10px 0}.brand-logo{width:148px;height:58px}.top-inner nav{justify-content:flex-start}.guide-article{padding-top:26px}.breadcrumbs{margin-bottom:34px}.lead{font-size:18px}.guide-article>section{padding:34px 0}.related-grid,.guide-grid{grid-template-columns:1fr}.guide-cta{padding:24px}.back-float{right:14px;bottom:14px;padding:11px 15px;font-size:14px}}