:root{
  --clr-primary:#0A2463;--clr-secondary:#3E92CC;--clr-accent:#FF6B6B;
  --bg:#F8F9FA;--surface:#FFFFFF;--text:#2B2D42;--muted:#6B7180;--line:#E6E8EE;
  --shadow-1:0 2px 8px rgba(0,0,0,.06);--shadow-2:0 4px 14px rgba(0,0,0,.10);
}
:root.dark{
  --bg:#1E1E2E;--surface:#25273A;--text:#EDF2F4;--muted:#C3C7D1;--line:#2F3246;
  --clr-primary:#3E92CC;--clr-secondary:#8AC8E9;--clr-accent:#FF6B6B;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6}
.container{max-width:1120px;margin:0 auto;padding:24px}

.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{position:fixed;left:16px;top:16px;padding:8px 12px;background:var(--clr-secondary);color:#fff;border-radius:6px;z-index:1000}

.site-header{position:sticky;top:0;background:var(--surface);box-shadow:var(--shadow-1);z-index:999}
.nav-wrap{display:flex;align-items:center;gap:16px}
.logo{font-weight:700;color:var(--clr-primary);text-decoration:none}
.nav ul{display:flex;gap:20px;list-style:none;margin:0;padding:0}
.nav a{color:var(--text);text-decoration:none}
.nav a:hover{color:var(--clr-secondary)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:8px}
.nav-toggle .bar{display:block;width:18px;height:2px;background:var(--text);margin:3px 0}
.mode-toggle{margin-left:auto;border:1px solid var(--line);background:var(--surface);border-radius:6px;padding:8px}

.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 16px;border-radius:6px;text-decoration:none;border:1px solid transparent;transition:transform .2s ease, box-shadow .2s ease}
.btn-primary{background:var(--clr-primary);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-secondary{background:var(--surface);border-color:var(--clr-secondary);color:var(--clr-secondary)}
.btn-secondary:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.link{color:var(--clr-secondary);text-decoration:none}
.link:hover{text-decoration:underline}

.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center;min-height:64vh}
.hero-art{height:280px;background:linear-gradient(135deg, var(--clr-secondary), var(--clr-primary));border-radius:12px}

.logo-row{display:flex;gap:24px;flex-wrap:wrap;list-style:none;padding:0;margin:0}

.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4 .card, .grid-3 .card, .grid-2 .card{height:100%}

.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:var(--shadow-1);transition:transform .2s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.chips{display:flex;gap:10px;flex-wrap:wrap;padding:0;margin:0;list-style:none}
.chip, .chips .chip{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:8px 12px;background:var(--surface);color:var(--text)}
.chip[aria-pressed="true"], .chip.active{background:var(--clr-secondary);color:#fff}

.carousel{position:relative}
.carousel-track{display:flex;overflow:hidden;scroll-behavior:smooth}
.testimonial{min-width:100%;padding:16px}
.carousel-prev,.carousel-next{position:absolute;top:50%;transform:translateY(-50%);border:1px solid var(--line);background:var(--surface);border-radius:50%;width:36px;height:36px}
.carousel-prev{left:8px}.carousel-next{right:8px}
.carousel-dots{display:flex;gap:8px;justify-content:center;margin-top:8px}
.carousel-dots button{width:8px;height:8px;border-radius:50%;border:1px solid var(--line);background:var(--surface)}
.carousel-dots button[aria-selected="true"]{background:var(--clr-secondary)}

.page-hero .lead{color:var(--muted)}

.site-footer{margin-top:48px;background:var(--surface);border-top:1px solid var(--line);padding:24px 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
.muted{color:var(--muted)}
.small{font-size:.875rem}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .4s ease, transform .4s ease}
.reveal.visible{opacity:1;transform:none}

/* Forms */
.field{display:grid;gap:6px;margin-bottom:12px}
input,select,textarea{padding:10px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--text)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--clr-secondary)}
.form-msg{min-height:1.2em}

/* Responsive */
@media (max-width: 960px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .hero{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 640px){
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .nav ul{display:none}
  .nav-toggle{display:inline-flex}
}