/* ==========================================================================
   Vertiv UPS Systems — SNA Power Engineering
   Design system: engineered navy + gold. Space Grotesk / Inter / JetBrains Mono
   ========================================================================== */

:root{
  /* Palette */
  --navy-900:#0b1220;
  --navy-800:#0d1526;
  --navy-700:#10182f;
  --navy-600:#151f3a;
  --navy-500:#1c2949;
  --gold:#d4af37;
  --gold-soft:#e6c65a;
  --blue:#5c83ee;
  --blue-600:#4f6ee0;
  --ink:#0d1526;
  --paper:#f6f7fb;
  --paper-2:#eef1f7;
  --white:#ffffff;
  --text:#1c2333;
  --muted:#5a6379;
  --muted-2:#8a93a8;
  --line:#e2e6ef;
  --line-dark:rgba(255,255,255,.10);
  --text-invert:#e8ecf6;
  --muted-invert:#9aa6c4;

  --radius:14px;
  --radius-sm:10px;
  --radius-lg:22px;
  --shadow:0 1px 2px rgba(13,21,38,.06),0 12px 32px -12px rgba(13,21,38,.18);
  --shadow-lg:0 24px 60px -20px rgba(13,21,38,.35);
  --maxw:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);

  --font-display:"Space Grotesk",-apple-system,Segoe UI,Roboto,sans-serif;
  --font-body:"Inter",-apple-system,Segoe UI,Roboto,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font-body);color:var(--text);
  background:var(--paper);line-height:1.65;font-size:16.5px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.1;letter-spacing:-.015em;margin:0}
p{margin:0 0 1rem}
::selection{background:var(--gold);color:var(--navy-800)}

/* Layout ------------------------------------------------------------------ */
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:60px 0}
.bg-navy{background:var(--navy-700);color:var(--text-invert)}
.bg-navy h1,.bg-navy h2,.bg-navy h3{color:#fff}
.bg-paper{background:var(--paper)}
.bg-white{background:var(--white)}
.bg-deep{background:linear-gradient(180deg,var(--navy-800),var(--navy-900))}

.eyebrow{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);margin:0 0 14px;font-weight:500;display:inline-flex;gap:10px;align-items:center}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);opacity:.7}
.bg-navy .eyebrow,.bg-deep .eyebrow{color:var(--gold-soft)}

.h-xl{font-size:clamp(2.1rem,5.2vw,3.55rem)}
.h-lg{font-size:clamp(1.8rem,4vw,2.7rem)}
.h-md{font-size:clamp(1.4rem,2.6vw,1.9rem)}
.lead{font-size:clamp(1.05rem,1.6vw,1.2rem);color:var(--muted);max-width:62ch}
.bg-navy .lead,.bg-deep .lead,.hero .lead{color:var(--muted-invert)}
.section-head{max-width:64ch;margin-bottom:44px}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* Buttons ----------------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-body);
  font-weight:600;font-size:.95rem;padding:13px 22px;border-radius:10px;
  border:1px solid transparent;cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s,color .18s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.btn-gold{background:var(--gold);color:var(--navy-800)}
.btn-gold:hover{background:var(--gold-soft);box-shadow:0 12px 26px -10px rgba(212,175,55,.7)}
.btn-dark{background:var(--navy-700);color:#fff}
.btn-dark:hover{background:var(--navy-600)}
.btn-ghost{background:transparent;color:currentColor;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-outline{background:#fff;color:var(--navy-700);border-color:var(--line)}
.btn-outline:hover{border-color:var(--navy-700)}
.btn svg{width:17px;height:17px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}

.chip{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;
  border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:6px 13px;display:inline-block}
.bg-navy .chip,.hero .chip{border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.05);color:var(--muted-invert)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* Header ------------------------------------------------------------------ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(11,18,32,.82);
  backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line-dark);color:#fff}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--gold),#b9932a);
  display:grid;place-items:center;color:var(--navy-800);flex:none;box-shadow:0 6px 16px -6px rgba(212,175,55,.6)}
.brand-mark svg{width:19px;height:19px}
.brand-name{font-family:var(--font-display);font-weight:700;font-size:1.06rem;letter-spacing:-.01em;line-height:1;color:#fff}
.brand-sub{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-invert);margin-top:3px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.92rem;font-weight:500;color:#cdd5e8;padding:9px 13px;border-radius:8px;transition:color .15s,background .15s}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-links a.active{color:#fff}
.nav-links a.active::after{content:"";display:block;height:2px;background:var(--gold);border-radius:2px;margin-top:5px}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-phone{font-family:var(--font-mono);font-size:.82rem;color:#fff;display:flex;align-items:center;gap:7px;padding:8px 12px;border:1px solid var(--line-dark);border-radius:9px}
.nav-phone svg{width:15px;height:15px;color:var(--gold)}
.nav-toggle{display:none;background:none;border:1px solid var(--line-dark);border-radius:9px;width:44px;height:40px;cursor:pointer;color:#fff}
.nav-toggle svg{width:20px;height:20px;margin:0 auto}

/* Hero -------------------------------------------------------------------- */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--navy-800)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.72),rgba(11,18,32,.92)),
             radial-gradient(1000px 500px at 78% -10%,rgba(92,131,238,.28),transparent 60%)}
.hero-inner{position:relative;z-index:1;padding:104px 0 92px}
.hero--sm .hero-inner{padding:74px 0 62px}
.hero h1{max-width:16ch}
.hero .lead{margin-top:18px}
.hero .btn-row{margin-top:30px}

/* Capacity ladder (signature) --------------------------------------------- */
.ladder{margin-top:52px;border-top:1px solid var(--line-dark);padding-top:22px}
.ladder-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-invert);margin-bottom:14px;display:flex;justify-content:space-between}
.ladder-track{position:relative;height:3px;background:rgba(255,255,255,.14);border-radius:3px}
.ladder-track::before{content:"";position:absolute;inset:0;border-radius:3px;
  background:linear-gradient(90deg,var(--blue),var(--gold))}
.ladder-ticks{display:flex;justify-content:space-between;margin-top:14px;gap:8px;flex-wrap:wrap}
.ladder-tick{font-family:var(--font-mono);font-size:.74rem;color:#cdd5e8}
.ladder-tick b{display:block;color:#fff;font-size:.92rem;letter-spacing:-.01em}
.ladder-tick span{color:var(--muted-invert);font-size:.64rem}

/* Stat strip -------------------------------------------------------------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-dark);
  border:1px solid var(--line-dark);border-radius:var(--radius);overflow:hidden}
.stat{background:var(--navy-700);padding:26px 22px;text-align:center}
.bg-paper .stats,.bg-white .stats{background:var(--line);border-color:var(--line)}
.bg-paper .stat,.bg-white .stat{background:#fff}
.stat b{font-family:var(--font-display);display:block;font-size:1.9rem;color:var(--gold);line-height:1}
.stat span{font-size:.82rem;color:var(--muted-invert);margin-top:8px;display:block}
.bg-paper .stat span,.bg-white .stat span{color:var(--muted)}

/* Cards ------------------------------------------------------------------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfd6e6}
.card h3{font-size:1.12rem;margin-bottom:9px}
.card p{color:var(--muted);font-size:.96rem;margin:0}
.card-ico{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,var(--navy-700),var(--navy-500));color:var(--gold)}
.card-ico svg{width:22px;height:22px}

/* Product card ------------------------------------------------------------ */
.product-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;transition:transform .2s var(--ease),box-shadow .2s,border-color .2s}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfd6e6}
.pc-media{position:relative;aspect-ratio:5/4;background:linear-gradient(180deg,#fff,#f2f4f9);
  display:grid;place-items:center;padding:24px;border-bottom:1px solid var(--line)}
.pc-media img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .3s var(--ease)}
.product-card:hover .pc-media img{transform:scale(1.04)}
.pc-media .pc-cap{position:absolute;top:12px;left:12px}
.pc-media .pc-tag{position:absolute;top:12px;right:12px}
.product-card .pc-top{padding:22px 22px 0;display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.product-card .pc-cap{font-family:var(--font-mono);font-size:.72rem;color:var(--blue-600);
  background:rgba(92,131,238,.12);border-radius:999px;padding:5px 11px;white-space:nowrap;backdrop-filter:blur(2px)}
.product-card .pc-body{padding:18px 22px 22px;display:flex;flex-direction:column;flex:1}
.product-card h3{font-size:1.08rem;margin-bottom:8px}
.product-card p{color:var(--muted);font-size:.92rem;flex:1;margin-bottom:16px}
.product-card .pc-link{font-weight:600;font-size:.9rem;color:var(--navy-700);display:inline-flex;align-items:center;gap:6px}
.product-card .pc-link svg{width:15px;height:15px;transition:transform .18s}
.product-card:hover .pc-link svg{transform:translateX(4px)}
.pc-tag{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--gold);border:1px solid rgba(212,175,55,.4);border-radius:5px;padding:3px 7px}

/* Feature / split --------------------------------------------------------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split-media{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split-media .frame-badge{position:absolute;left:18px;bottom:18px;background:rgba(11,18,32,.82);
  backdrop-filter:blur(6px);border:1px solid var(--line-dark);color:#fff;border-radius:10px;padding:10px 14px;font-family:var(--font-mono);font-size:.74rem}

/* Product shot (detail page) --------------------------------------------- */
.product-shot{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  background:radial-gradient(120% 120% at 50% 0,#fff,#eaeef6);padding:40px;display:grid;place-items:center;box-shadow:var(--shadow)}
.product-shot img{width:100%;max-height:400px;object-fit:contain;mix-blend-mode:multiply}

/* Checklist / steps ------------------------------------------------------- */
.checklist{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:14px}
.checklist li{display:flex;gap:13px;align-items:flex-start;font-size:.98rem}
.checklist li svg{width:20px;height:20px;color:var(--gold);flex:none;margin-top:2px}
.bg-navy .checklist li{color:var(--text-invert)}

.steps{counter-reset:step;display:grid;gap:20px}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;
  padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--font-mono);font-size:1.1rem;color:var(--gold);font-weight:500;
  border:1px solid var(--line);border-radius:9px;padding:8px 12px;background:var(--paper)}
.step h3{font-size:1.08rem;margin-bottom:6px}
.step p{margin:0;color:var(--muted);font-size:.95rem}

/* Spec table -------------------------------------------------------------- */
.spec-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:.9rem;min-width:640px}
table.spec th,table.spec td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.spec thead th{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted-2);background:var(--paper);position:sticky;top:0}
table.spec tbody tr:last-child td{border-bottom:none}
table.spec td:first-child{font-weight:600;color:var(--ink)}
table.spec .mono{font-family:var(--font-mono);font-size:.82rem}

/* Breadcrumb -------------------------------------------------------------- */
.crumbs{font-family:var(--font-mono);font-size:.74rem;color:var(--muted-invert);
  display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin-bottom:22px}
.crumbs a{color:var(--muted-invert)}
.crumbs a:hover{color:#fff}
.crumbs span{color:var(--gold)}
.crumbs .sep{opacity:.5}

/* FAQ --------------------------------------------------------------------- */
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:20px 4px}
.bg-navy .faq details,.bg-deep .faq details{border-color:var(--line-dark)}
.faq summary{cursor:pointer;list-style:none;font-family:var(--font-display);font-weight:600;
  font-size:1.06rem;display:flex;justify-content:space-between;gap:18px;align-items:center;color:var(--ink)}
.bg-navy .faq summary,.bg-deep .faq summary{color:#fff}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-mono);color:var(--gold);font-size:1.5rem;transition:transform .2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:14px 0 0;color:var(--muted)}
.bg-navy .faq details p,.bg-deep .faq details p{color:var(--muted-invert)}

/* CTA band ---------------------------------------------------------------- */
.cta-band{position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:linear-gradient(120deg,var(--navy-700),var(--navy-900));
  border:1px solid var(--line-dark);padding:52px 44px;text-align:center;color:#fff}
.cta-band::before{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 50% -20%,rgba(212,175,55,.22),transparent 60%)}
.cta-band>*{position:relative}
.cta-band .lead{margin:12px auto 0;color:var(--muted-invert)}
.cta-band .btn-row{justify-content:center;margin-top:26px}

/* Footer ------------------------------------------------------------------ */
.site-footer{background:var(--navy-900);color:var(--muted-invert);padding:70px 0 30px;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:.92rem;max-width:34ch}
.footer-contact{font-family:var(--font-mono);font-size:.82rem;margin-top:16px;display:grid;gap:8px}
.footer-contact a{color:#fff}
.footer-contact a:hover{color:var(--gold)}
.footer-col h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:#fff;margin-bottom:16px;font-weight:500}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{font-size:.9rem;color:var(--muted-invert)}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{margin-top:52px;padding-top:24px;border-top:1px solid var(--line-dark);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.8rem}
.footer-bottom a{color:var(--muted-invert)}
.footer-bottom a:hover{color:#fff}
.footer-partners{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.footer-partners img{height:34px;width:auto;opacity:.85;filter:saturate(0) brightness(1.6);transition:opacity .2s,filter .2s}
.footer-partners a:hover img{opacity:1;filter:none}

/* Forms ------------------------------------------------------------------- */
.form{display:grid;gap:16px}
.form .field label{display:block;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);margin-bottom:7px}
.form input,.form textarea,.form select{width:100%;padding:13px 15px;border:1px solid var(--line);
  border-radius:10px;font-family:var(--font-body);font-size:.96rem;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(92,131,238,.18)}
.form textarea{min-height:130px;resize:vertical}
.form-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* Info list / definition -------------------------------------------------- */
.deflist{display:grid;gap:2px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.deflist div{background:#fff;padding:16px 18px;display:flex;justify-content:space-between;gap:16px}
.deflist dt{font-weight:600;color:var(--ink)}
.deflist dd{margin:0;font-family:var(--font-mono);font-size:.85rem;color:var(--muted);text-align:right}

/* Dealer grid ------------------------------------------------------------- */
.dealer-grid{columns:4;column-gap:26px}
.dealer-grid li{break-inside:avoid;list-style:none;font-family:var(--font-mono);font-size:.8rem;
  color:var(--muted-invert);padding:7px 0;border-bottom:1px solid var(--line-dark)}
.dealer-grid li b{color:#fff;font-weight:500}

/* Prose (guide / article) ------------------------------------------------- */
.prose{max-width:760px}
.prose h2{font-size:1.6rem;margin:44px 0 14px}
.prose h3{font-size:1.2rem;margin:30px 0 10px}
.prose p{color:var(--text);font-size:1.02rem}
.prose ul{padding-left:1.1rem;color:var(--text)}
.prose li{margin-bottom:8px}
.prose .callout{background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:10px;padding:18px 20px;margin:24px 0}
.prose .callout p{margin:0;color:var(--muted)}
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin-bottom:34px}
.toc h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.toc ol{margin:0;padding-left:1.2rem;display:grid;gap:7px;color:var(--navy-700)}
.toc a{color:var(--navy-700);font-weight:500}
.toc a:hover{color:var(--gold)}

/* Reveal animation -------------------------------------------------------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* Responsive -------------------------------------------------------------- */
@media (max-width:960px){
  .split{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .dealer-grid{columns:2}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav-links,.nav-phone{display:none}
  .nav-toggle{display:grid;place-items:center}
  .site-header.open .nav-links{display:flex;position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;background:var(--navy-800);border-bottom:1px solid var(--line-dark);
    padding:12px;gap:2px}
  .site-header.open .nav-links a{padding:13px 14px;border-radius:8px}
  .section{padding:64px 0}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:40px 24px}
}
@media (max-width:560px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .form-2{grid-template-columns:1fr}
  .dealer-grid{columns:1}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .hero-inner{padding:80px 0 64px}
  .ladder-tick span{display:none}
}
@media (max-width:400px){
  .container{padding:0 16px}
  .nav{gap:10px}
  .nav-cta{gap:8px}
  .nav-cta .btn-gold{padding:10px 13px;font-size:.86rem}
  .brand-sub{display:none}
  .brand-name{font-size:1rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}