:root{
  --bg:#0d131b; --panel:#111723; --muted:#0f1620;
  --text:#e9eff7; --soft:#a8b3c4;
  --brand:#4f9cff; --brand-2:#7c6cff;
  --border:rgba(255,255,255,.10);
  --radius:14px; --shadow:0 10px 30px rgba(0,0,0,.35);
}

/* base (mobile-first) */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg); color:var(--text); line-height:1.55;
}

img{max-width:100%; display:block}

/* containers */
.container{width:min(100%,1080px); margin:0 auto; padding:0 16px}

/* header */
.site-header{position:sticky; top:0; z-index:10; background:#0f1520cc; border-bottom:1px solid var(--border); backdrop-filter:blur(6px)}
.header-wrap{display:flex; flex-direction:column; gap:10px; padding:12px 0}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--text); font-weight:700}
.brand img{height:34px}
.nav{display:flex; gap:14px; flex-wrap:wrap}
.nav a{color:var(--soft); text-decoration:none; padding:6px 0}
.nav a:hover{color:var(--text)}

/* hero */
.hero{padding:28px 0}
.hero-grid{display:grid; grid-template-columns:1fr; gap:18px}
.hero-copy h1{margin:0 0 8px; font-size:clamp(22px,6vw,36px)}
.hero-copy p{color:var(--soft); margin:0 0 12px}
.hero-mini{font-size:12px; color:#9fb1c7}
.hero-card{border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow)}
.hero-card img{width:100%; height:220px; object-fit:cover}

/* sections/cards */
.section{padding:28px 0}
.section.muted{background:var(--muted); border-block:1px solid var(--border)}
.cols-3{display:grid; grid-template-columns:1fr; gap:16px}
.card{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); padding:16px; box-shadow:var(--shadow)}
.card h3{margin:0 0 6px}

/* steps & faq */
.steps{display:flex; flex-direction:column; gap:12px}
.steps ol{margin:0 0 6px 18px; color:var(--soft)}
.faq details{background:var(--panel); border:1px solid var(--border); border-radius:12px; padding:12px; margin-bottom:10px}
.faq summary{cursor:pointer; font-weight:700}

/* buttons */
.btn{display:inline-block; padding:13px 18px; border-radius:12px; font-weight:800; text-decoration:none; color:#fff; border:1px solid rgba(255,255,255,.12); box-shadow:0 8px 24px rgba(79,156,255,.25); transition:transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),#0a71ff)}
.btn-secondary{background:linear-gradient(135deg,#2cc3a5,#52d0ff)}

/* footer */
.site-footer{border-top:1px solid var(--border); padding:18px 0; color:var(--soft)}
.footer-grid{display:flex; flex-direction:column; gap:8px; align-items:flex-start}
.footer-nav{display:flex; gap:12px; flex-wrap:wrap}
.footer-nav a{color:var(--soft); text-decoration:none}
.footer-nav a:hover{color:var(--text)}

/* ---------- breakpoints ---------- */

/* ≥ 600px (phones grandes) */
@media (min-width:600px){
  .hero-card img{height:260px}
  .btn{padding:14px 20px}
}

/* ≥ 768px (tablet) */
@media (min-width:768px){
  .header-wrap{flex-direction:row; align-items:center; justify-content:space-between}
  .hero{padding:40px 0}
  .hero-grid{grid-template-columns:1.1fr .9fr; gap:28px; align-items:center}
  .cols-3{grid-template-columns:repeat(3,1fr); gap:18px}
}

/* ≥ 1024px (desktop) */
@media (min-width:1024px){
  .container{padding:0 20px}
  .hero-copy h1{font-size:40px}
  .hero-card img{height:300px}
}