/* =====================
   Bridge Ads - Design System (styles.css)
   ===================== */

/* Colors & tokens */
:root{
  --brand-900:#003366;
  --brand-800:#0a3f75;
  --brand-700:#0a4d8c;
  --brand-600:#0055A4;  /* primary */
  --accent-500:#00B3E6; /* accent */
  --bg-100:#F9FAFB;     /* base bg */
  --bg-hero:#f2f8ff;    /* hero tint */
  --text-900:#1F2937;   /* body */
  --text-700:#374151;   /* secondary */
  --muted:#eef1f4;
  --white:#fff;
  --shadow:0 10px 25px rgba(0,0,0,.08);
  --radius:14px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text-900);
  background:var(--bg-100);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* Utilities */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.h1{font-size:44px;line-height:1.12;margin:0 0 12px;color:var(--brand-900);font-weight:800}
.h2{font-size:32px;line-height:1.2;margin:0 0 10px;color:var(--brand-900);font-weight:800}
.lead{font-size:18px;color:var(--text-700);line-height:1.7;margin:0}
.center{text-align:center}

/* Header / Nav */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(1.2) blur(8px);
  border-bottom:1px solid var(--muted);
}
.navbar{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:36px;width:auto}
.brand-name{font-weight:800;color:var(--brand-900);letter-spacing:.2px}

.nav{display:flex;gap:18px;align-items:center}
.nav a{padding:8px 12px;border-radius:10px;color:var(--text-900);font-weight:700;text-decoration:none}
.nav a:hover{background:#eef6ff}
.nav a.active{background:var(--brand-600);color:var(--white)}
.nav-cta{padding:10px 14px;background:var(--brand-600);color:#fff;border-radius:12px;box-shadow:var(--shadow);font-weight:800}
.nav-cta:hover{background:var(--accent-500)}

.nav-toggle{display:none;border:0;background:transparent;font-size:22px}
@media (max-width:900px){
  .nav{display:none}
  .nav.is-open{
    display:flex;position:absolute;top:68px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--muted);
    padding:12px 20px;flex-direction:column;gap:8px
  }
  .nav-toggle{display:block}
}

/* Hero */
.hero{padding:88px 0;background:linear-gradient(135deg,#f6fbff, var(--bg-hero))}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center}
.hero .badge{display:inline-block;background:#e6f5ff;color:#0369a1;border:1px solid #ccecff;padding:6px 10px;border-radius:999px;font-weight:800;margin-bottom:12px}
.hero .cta{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap}
.hero-illu{filter:drop-shadow(0 12px 28px rgba(0,0,0,.12))}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;border:1px solid transparent;font-weight:800;box-shadow:var(--shadow);transition:.2s;cursor:pointer}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--accent-500)}
.btn-ghost{background:#fff;border-color:#e5eaf0;color:var(--brand-600)}
.btn-ghost:hover{border-color:#cfe2ff}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
}

/* Cards & Grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media (max-width:1000px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .grid-3,.grid-2{grid-template-columns:1fr}
}
.card{
  background:#fff;border:1px solid var(--muted);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);transition:transform .2s ease, box-shadow .2s ease
}
.card:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(0,0,0,.09)}
.card .icon{height:40px;width:40px;border-radius:10px;background:#e8f3ff;display:inline-flex;align-items:center;justify-content:center;margin-bottom:10px;color:var(--brand-600)}

/* Steps */
.steps{counter-reset:step;display:grid;gap:14px}
.step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:flex-start}
.step-num{counter-increment:step;background:var(--brand-600);color:#fff;min-width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:900;margin-top:2px}
.step-title{font-weight:900;color:var(--brand-900);margin-top:2px}
.step p{margin:0;color:var(--text-700)}

/* Testimonials */
.testimonials{background:linear-gradient(180deg,#f7fbff,#eef6ff);border-top:1px solid var(--muted);border-bottom:1px solid var(--muted)}
.quote{background:#fff;border:1px solid var(--muted);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
.quote .who{display:flex;align-items:center;gap:12px;margin-top:12px;font-weight:800;color:var(--brand-900)}

/* Contact CTA */
.contact-cta{background:linear-gradient(135deg,var(--brand-600),var(--brand-800));color:#fff;border-radius:18px;padding:32px;box-shadow:var(--shadow);text-align:center}
.contact-cta .btn{box-shadow:none}

/* Footer */
.site-footer{background:#0d2342;color:#c8d4e3;padding:32px 0;margin-top:64px}
.site-footer a{color:#e7f2ff}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:18px}
.footer-note{color:#9fb2c9;font-size:14px;margin-top:12px}
.socials{display:flex;gap:10px;margin-top:10px}
.socials a{height:36px;width:36px;border-radius:50%;background:#fff;color:#0A66C2;display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow)}

@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr}
}