/* Biz San Marino — foglio di stile */
:root{
  --navy:#0e2a47;
  --navy-2:#163a5f;
  --azzurro:#4ea5e0;
  --azzurro-chiaro:#e8f3fc;
  --oro:#d9a441;
  --testo:#24313f;
  --grigio:#5d6b7a;
  --bordo:#dde6ef;
  --bianco:#ffffff;
  --sfondo:#f6f9fc;
  --raggio:14px;
  --ombra:0 10px 30px rgba(14,42,71,.08);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--testo);background:var(--bianco);line-height:1.65;font-size:17px;
}
img{max-width:100%;display:block}
a{color:var(--azzurro);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1140px,100% - 32px);margin-inline:auto}

/* ---------- Header ---------- */
.header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--bordo);
}
.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:800;font-size:1.25rem;letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo img{width:38px;height:38px}
.logo span{color:var(--azzurro)}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--testo);font-weight:500;font-size:.95rem}
.nav a:hover{color:var(--azzurro);text-decoration:none}
.lang{display:flex;gap:4px;border:1px solid var(--bordo);border-radius:999px;padding:3px}
.lang a{padding:4px 10px;border-radius:999px;font-size:.8rem;font-weight:700;color:var(--grigio)}
.lang a.active{background:var(--navy);color:#fff}
.lang a:hover{text-decoration:none}

/* menu mobile (solo CSS) */
#menu-toggle{display:none}
.menu-btn{display:none;cursor:pointer;width:42px;height:42px;border-radius:10px;border:1px solid var(--bordo);
  align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-btn span{display:block;width:20px;height:2px;background:var(--navy);border-radius:2px}

/* ---------- Bottoni ---------- */
.btn{display:inline-block;padding:14px 26px;border-radius:999px;font-weight:700;font-size:.98rem;transition:.2s}
.btn-primary{background:var(--azzurro);color:#fff;box-shadow:0 8px 20px rgba(78,165,224,.35)}
.btn-primary:hover{background:#3a92cd;text-decoration:none;transform:translateY(-1px)}
.btn-ghost{border:2px solid rgba(255,255,255,.4);color:#fff;margin-left:10px}
.btn-ghost:hover{border-color:#fff;text-decoration:none}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#1f5687 100%);
  color:#fff;padding:90px 0 100px;position:relative;overflow:hidden;
}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(78,165,224,.35),transparent 70%)}
.hero .container{display:grid;grid-template-columns:1.05fr 1fr;gap:50px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  padding:6px 14px;border-radius:999px;font-size:.82rem;font-weight:600;letter-spacing:.04em;margin-bottom:22px}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.4rem);line-height:1.12;letter-spacing:-.03em;margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--azzurro)}
.hero p{font-size:1.12rem;color:rgba(255,255,255,.82);max-width:540px;margin-bottom:32px}
.hero-img{filter:drop-shadow(0 25px 45px rgba(0,0,0,.3))}

/* ---------- Sezioni ---------- */
section{padding:90px 0}
.section-alt{background:var(--sfondo)}
.section-head{text-align:center;max-width:680px;margin:0 auto 54px}
.section-head .tag{color:var(--azzurro);font-weight:700;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase}
.section-head h2{font-size:clamp(1.8rem,3.4vw,2.5rem);color:var(--navy);letter-spacing:-.02em;line-height:1.2;margin:10px 0 14px}
.section-head p{color:var(--grigio)}

/* Servizi */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--bordo);border-radius:var(--raggio);padding:30px;transition:.25s}
.card:hover{box-shadow:var(--ombra);transform:translateY(-4px);border-color:transparent}
.icon{width:54px;height:54px;border-radius:12px;background:var(--azzurro-chiaro);display:grid;place-items:center;margin-bottom:20px}
.icon svg{width:28px;height:28px;stroke:var(--azzurro);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card h3{color:var(--navy);font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--grigio);font-size:.96rem}

/* Chi siamo */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split h2{font-size:clamp(1.8rem,3.4vw,2.4rem);color:var(--navy);line-height:1.2;letter-spacing:-.02em;margin:10px 0 18px}
.split .tag{color:var(--azzurro);font-weight:700;font-size:.85rem;letter-spacing:.12em;text-transform:uppercase}
.split p{color:var(--grigio);margin-bottom:14px}
.checks{list-style:none;margin-top:22px}
.checks li{padding-left:34px;position:relative;margin-bottom:12px;font-weight:500}
.checks li::before{content:"";position:absolute;left:0;top:3px;width:22px;height:22px;border-radius:50%;
  background:var(--azzurro-chiaro) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234ea5e0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/13px no-repeat}
.split-img{border-radius:20px;overflow:hidden;box-shadow:var(--ombra)}

/* Come lavoriamo */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{background:#fff;border-radius:var(--raggio);padding:28px;border:1px solid var(--bordo);position:relative}
.step::before{counter-increment:step;content:"0" counter(step);display:block;font-size:2rem;font-weight:800;
  color:var(--azzurro);opacity:.35;margin-bottom:10px;letter-spacing:-.03em}
.step h3{color:var(--navy);font-size:1.08rem;margin-bottom:8px}
.step p{color:var(--grigio);font-size:.94rem}

/* Box AI (secondario) */
.ai-box{margin-top:44px;display:flex;gap:22px;align-items:center;background:var(--azzurro-chiaro);
  border-radius:var(--raggio);padding:26px 30px;border-left:4px solid var(--azzurro)}
.ai-box .icon{background:#fff;margin:0;flex-shrink:0}
.ai-box p{color:var(--testo);font-size:.98rem}

/* Modelli di collaborazione */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.model{background:#fff;border:1px solid var(--bordo);border-radius:var(--raggio);padding:30px 26px;text-align:center}
.model.featured{background:var(--navy);color:#fff;border-color:var(--navy);transform:scale(1.03);box-shadow:var(--ombra)}
.model.featured h3,.model.featured p{color:#fff}
.model.featured p{opacity:.8}
.model .badge{display:inline-block;background:var(--oro);color:var(--navy);font-size:.72rem;font-weight:800;
  padding:4px 10px;border-radius:999px;margin-bottom:12px;letter-spacing:.05em;text-transform:uppercase}
.model h3{color:var(--navy);font-size:1.15rem;margin-bottom:10px}
.model p{color:var(--grigio);font-size:.94rem}

/* Banda CTA */
.cta{background:linear-gradient(135deg,var(--azzurro),#2f7fbf);color:#fff;text-align:center;padding:70px 0}
.cta h2{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:12px;letter-spacing:-.02em}
.cta p{opacity:.9;margin-bottom:28px}
.cta .btn{background:#fff;color:var(--navy)}
.cta .btn:hover{text-decoration:none;transform:translateY(-1px)}

/* Contatti */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#fff;border:1px solid var(--bordo);border-radius:var(--raggio);padding:30px;text-align:center}
.contact-card .icon{margin:0 auto 16px}
.contact-card h3{color:var(--navy);font-size:1.05rem;margin-bottom:6px}
.contact-card p{color:var(--grigio);font-size:.96rem}

/* Footer */
.footer{background:var(--navy);color:rgba(255,255,255,.7);padding:46px 0 30px;font-size:.92rem}
.footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px}
.footer .logo{color:#fff;margin-bottom:10px}
.footer a{color:rgba(255,255,255,.85)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;width:100%;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.85rem}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero .container,.split{grid-template-columns:1fr}
  .hero{padding:60px 0 70px}
  .hero-img{max-width:520px;margin:0 auto}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps,.grid-4{grid-template-columns:repeat(2,1fr)}
  .model.featured{transform:none}
}
@media (max-width:760px){
  .menu-btn{display:flex}
  .nav{position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;
    gap:0;padding:8px 16px 18px;border-bottom:1px solid var(--bordo);display:none}
  .nav a{padding:12px 0;width:100%;border-bottom:1px solid var(--bordo)}
  .nav .lang{margin-top:14px}
  .nav .lang a{border:none;width:auto;padding:4px 12px}
  #menu-toggle:checked ~ .nav{display:flex}
  section{padding:64px 0}
  .grid-3,.steps,.grid-4,.contact-grid{grid-template-columns:1fr}
  .ai-box{flex-direction:column;align-items:flex-start}
  .btn-ghost{margin:12px 0 0}
}