:root{
  --vt-ink:#102437;
  --vt-muted:#5c6d7c;
  --vt-blue:#075d96;
  --vt-blue-dark:#063e67;
  --vt-pale:#edf6fb;
  --vt-line:#d6e2ea;
  --vt-navy:#06192b;
  --vt-navy-soft:#0b2942;
  --vt-orange:#ff7a00;
  --vt-orange-dark:#d95f00;
  --vt-white:#fff;
  --vt-shadow:0 12px 30px rgba(15,39,59,.1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--vt-ink);background:#f6f7f8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--vt-blue)}
.vt-skip{position:absolute;left:-9999px;top:8px;z-index:1000;background:#fff;padding:10px 14px;border-radius:8px}
.vt-skip:focus{left:8px}
.vt-site-header{position:sticky;top:0;z-index:50;background:rgba(6,25,43,.98);border-bottom:1px solid rgba(255,122,0,.38);box-shadow:0 4px 18px rgba(3,17,29,.14);backdrop-filter:blur(10px)}
.vt-site-header-inner{width:min(1160px,calc(100% - 28px));min-height:66px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:18px}
.vt-wordmark{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:950;letter-spacing:.025em}
.vt-wordmark img{display:block;width:44px;height:44px;border-radius:12px}
.vt-wordmark span span{color:var(--vt-orange)}
.vt-main-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.vt-main-nav a{padding:9px 10px;border-radius:8px;color:#dce8f0;text-decoration:none;font-size:13px;font-weight:750}
.vt-main-nav a:hover,.vt-main-nav a[aria-current="page"]{background:rgba(255,255,255,.1);color:#fff}
.vt-nav-pack{background:var(--vt-orange)!important;color:var(--vt-navy)!important}

.vt-home-main,.vt-tool-main{width:min(1160px,calc(100% - 28px));margin:auto}
.vt-home-hero{margin-top:24px;padding:42px;border:1px solid rgba(255,122,0,.55);border-radius:26px;background:radial-gradient(circle at 92% 8%,rgba(255,122,0,.16),transparent 28%),linear-gradient(145deg,var(--vt-navy),#071f34);color:#fff;box-shadow:0 18px 42px rgba(6,25,43,.18)}
.vt-home-brand-intro{display:flex;align-items:center;gap:22px}
.vt-home-brand-intro>img{display:block;flex:0 0 auto;width:112px;height:112px;border-radius:26px;box-shadow:0 10px 26px rgba(0,0,0,.22)}
.vt-kicker{margin:0 0 10px;color:var(--vt-orange);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.12em}
.vt-home-hero h1,.vt-tool-hero h1{margin:0;max-width:790px;font-size:clamp(2.2rem,6vw,4.4rem);line-height:1.02;letter-spacing:-.045em}
.vt-home-hero h1 span{color:var(--vt-orange)}
.vt-home-hero p,.vt-tool-hero>p{max-width:720px;color:var(--vt-muted);font-size:clamp(1rem,2vw,1.2rem);line-height:1.65}
.vt-home-hero>p{color:#d7e4ed}
.vt-hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.vt-button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 16px;border:1px solid var(--vt-orange);border-radius:10px;background:var(--vt-orange);color:var(--vt-navy);text-decoration:none;font-weight:900}
.vt-button:hover{background:#ff8d27;border-color:#ff8d27}
.vt-button.secondary{background:#fff;color:var(--vt-navy);border-color:#fff}
.vt-install-button{font:inherit;cursor:pointer}
.vt-home-trust{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.vt-home-trust span{padding:7px 10px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(255,255,255,.07);color:#eef6fb;font-size:12px;font-weight:800}

.vt-section{padding:34px 0}
.vt-section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}
.vt-section h2{margin:0;font-size:clamp(1.55rem,3vw,2.2rem)}
.vt-section-head p{margin:5px 0 0;color:var(--vt-muted)}
.vt-tool-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.vt-tool-link{display:grid;grid-template-rows:220px 1fr;overflow:hidden;border:1px solid var(--vt-line);border-radius:18px;background:#fff;color:var(--vt-ink);text-decoration:none;box-shadow:var(--vt-shadow);transition:transform .16s ease,box-shadow .16s ease}
.vt-tool-link:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(15,39,59,.14)}
.vt-tool-link>img{display:block;width:100%;height:220px;object-fit:cover;background:#dbe4e9}
.vt-tool-link:nth-child(2)>img,.vt-tool-link:nth-child(3)>img{object-position:center 44%}
.vt-tool-link-content{padding:20px;border-top:4px solid var(--vt-orange)}
.vt-tool-link h3{margin:0 0 8px;font-size:1.4rem}
.vt-tool-link p{margin:0 0 16px;color:var(--vt-muted);line-height:1.5}
.vt-tool-link strong{display:inline-flex;align-items:center;gap:8px;color:var(--vt-orange-dark)}
.vt-home-pack{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:8px 0 28px;padding:26px;border-radius:18px;background:var(--vt-navy);color:#fff}
.vt-home-pack h2{margin:0 0 8px;font-size:clamp(1.4rem,3vw,2rem)}
.vt-home-pack p{max-width:680px;margin:0;color:#cfdee8;line-height:1.6}
.vt-home-pack .vt-kicker{margin-bottom:7px}
.vt-home-about{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:0 0 42px;padding:22px 0;border-top:1px solid var(--vt-line)}
.vt-home-about h2{margin:0 0 7px;font-size:1.35rem}
.vt-home-about p{max-width:800px;margin:0;color:var(--vt-muted);line-height:1.6}
.vt-home-about>a{flex:0 0 auto;color:var(--vt-orange-dark);font-weight:850;text-decoration:none}
.vt-value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.vt-value-card{padding:22px;border:1px solid var(--vt-line);border-radius:16px;background:#fff}
.vt-value-card h3{margin:0 0 8px}
.vt-value-card p{margin:0;color:var(--vt-muted);line-height:1.6}
.vt-manufacturer-strip{display:flex;gap:10px;flex-wrap:wrap}
.vt-manufacturer-strip span{padding:9px 12px;border:1px solid var(--vt-line);border-radius:999px;background:#fff;font-weight:800;font-size:13px}

.vt-breadcrumbs{padding-top:22px;color:var(--vt-muted);font-size:14px}
.vt-breadcrumbs a{text-decoration:none}
.vt-tool-hero{padding:22px 0 18px}
.vt-tool-hero h1{font-size:clamp(2rem,5vw,3.6rem)}
.vt-tool-trust{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.vt-tool-trust span{padding:7px 10px;border-radius:999px;background:#e3f1f9;color:#164f73;font-size:12px;font-weight:850}
.vt-calculator-mount{scroll-margin-top:82px}
.vt-calculator-mount>.page{display:block!important;padding:0!important}
.vt-calculator-mount .app-header{border-radius:15px 15px 0 0}
.vt-calculator-mount .back{display:none}
.vt-calculator-mount .page-intro{margin-top:0}
.vt-supporting-content{max-width:900px;margin:34px auto 50px}
.vt-supporting-content section{padding:22px 0;border-top:1px solid var(--vt-line)}
.vt-site-photo{margin:0 0 8px;overflow:hidden;border:1px solid #cbdde8;border-radius:22px;background:#e8f1f6;box-shadow:0 16px 38px rgba(5,39,65,.11)}
.vt-site-photo img{display:block;width:100%;height:min(52vw,520px);object-fit:cover}
.vt-site-photo-portrait img{object-position:center 46%}
.vt-site-photo figcaption{padding:13px 16px;color:#496274;background:#f7fbfd;font-size:.9rem;line-height:1.5}
.vt-supporting-content h2{margin:0 0 12px;font-size:1.55rem}
.vt-supporting-content h3{margin:18px 0 8px}
.vt-supporting-content p,.vt-supporting-content li{color:#40576a;line-height:1.75}
.vt-supporting-content ul,.vt-supporting-content ol{padding-left:22px}
.vt-example{padding:18px!important;border:1px solid #9fc9e3!important;border-radius:14px;background:#edf7fd}
.vt-example strong{color:var(--vt-blue-dark)}
.vt-related{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.vt-related a{display:block;padding:14px;border:1px solid var(--vt-line);border-radius:12px;background:#fff;text-decoration:none;font-weight:800}

.dc-dimension-editor{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.dc-dimension-field{padding:14px;border:1px solid var(--vt-line);border-radius:13px;background:#f8fbfc}
.dc-dimension-field.active{border-color:#2b83b8;box-shadow:0 0 0 3px rgba(43,131,184,.13)}
.dc-dimension-field>label{display:block;margin-bottom:8px;font-weight:850}
.dc-stepper{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:7px}
.dc-stepper button{border:1px solid #b7cbd8;border-radius:9px;background:#fff;color:var(--vt-blue-dark);font-size:20px;font-weight:900}
.dc-stepper input{text-align:center}
.dc-adjust-toggle{margin-top:12px}
.dc-adjust-toggle button{min-height:42px}
.dc-slider-only{display:grid;gap:8px;margin-top:14px}
.dc-slider-only input{width:100%}
.dc-swap-row{display:flex;justify-content:flex-end;margin-top:10px}
.dc-swap-row button{border:0;background:transparent;color:var(--vt-blue);font-weight:850;text-decoration:underline}

.vt-site-footer{padding:28px 0;border-top:1px solid rgba(255,122,0,.42);background:var(--vt-navy);color:#fff}
.vt-site-footer-inner{width:min(1160px,calc(100% - 28px));margin:auto;display:flex;justify-content:space-between;gap:18px;align-items:flex-start}
.vt-site-footer p{margin:4px 0;color:#b9cad6;font-size:13px}
.vt-footer-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}
.vt-footer-links a,.vt-footer-links button{padding:5px;border:0;background:transparent;color:#ffad62;font:inherit;font-size:13px;text-decoration:none;cursor:pointer}

@media(max-width:820px){
  .vt-main-nav a:not(.vt-nav-pack){display:none}
  .vt-home-hero{padding:34px}
  .vt-tool-links,.vt-value-grid{grid-template-columns:1fr}
  .vt-tool-link{grid-template-columns:minmax(180px,.85fr) minmax(0,1.15fr);grid-template-rows:none}
  .vt-tool-link>img{height:100%;min-height:220px}
  .vt-tool-link-content{border-top:0;border-left:4px solid var(--vt-orange)}
  .vt-home-pack,.vt-home-about{align-items:flex-start}
  .vt-site-footer-inner{display:block}
  .vt-footer-links{justify-content:flex-start;margin-top:14px}
}

@media(max-width:560px){
  .vt-site-header-inner,.vt-home-main,.vt-tool-main,.vt-site-footer-inner{width:min(100% - 18px,1160px)}
  .vt-wordmark span{font-size:14px}
  .vt-wordmark img{width:40px;height:40px;border-radius:10px}
  .vt-main-nav a{padding:8px}
  .vt-home-hero{margin-top:12px;padding:25px 18px;border-radius:20px}
  .vt-home-brand-intro{align-items:flex-start;gap:14px}
  .vt-home-brand-intro>img{width:76px;height:76px;border-radius:18px}
  .vt-home-hero h1,.vt-tool-hero h1{letter-spacing:-.035em}
  .vt-hero-actions{display:grid;grid-template-columns:1fr}
  .vt-button{width:100%}
  .vt-tool-link{display:block}
  .vt-tool-link>img{width:100%;height:190px;min-height:0}
  .vt-tool-link-content{border-top:4px solid var(--vt-orange);border-left:0}
  .vt-home-pack,.vt-home-about{display:block;padding:20px}
  .vt-home-pack .vt-button{margin-top:18px}
  .vt-home-about{padding-inline:0}
  .vt-home-about>a{display:inline-block;margin-top:12px}
  .vt-calculator-mount{margin-inline:-5px}
  .dc-dimension-editor{grid-template-columns:1fr}
  .vt-related{grid-template-columns:1fr}
}