/* BNT Racing — stile sito v2 (dark racing, accento rosso) */
:root{
  --accent:#e6222e; --accent-hot:#ff2f3c; --accent-soft:rgba(230,34,46,.13); --accent-line:rgba(230,34,46,.45);
  --bg:#0a0c10; --bg2:#0f1319; --card:#141a22; --card2:#1a212b;
  --txt:#eef2f7; --muted:#9aa5b1; --line:#232c37; --ok:#22c55e;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:'Segoe UI',system-ui,-apple-system,sans-serif;line-height:1.6}
img{max-width:100%}
a{color:inherit}

/* ---------- header ---------- */
.bnt-header{position:sticky;top:0;z-index:50;background:rgba(10,12,16,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bnt-nav{max-width:1200px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:13px 24px;gap:16px}
.bnt-logo{font-weight:900;font-size:22px;font-style:italic;letter-spacing:-.5px;text-decoration:none;line-height:1.1}
.bnt-logo b{color:var(--accent)}
.bnt-logo small{display:block;font-size:9px;letter-spacing:.45em;color:var(--muted);font-style:normal;font-weight:600}
.bnt-menu{display:flex;align-items:center;gap:2px}
.bnt-menu a{color:var(--muted);text-decoration:none;font-size:14px;font-weight:600;padding:8px 12px;border-radius:8px}
.bnt-menu a:hover{color:var(--txt);background:var(--card)}
.bnt-menu a.active{color:var(--txt)}
.bnt-menu a.active::after{content:"";display:block;height:2px;margin-top:2px;background:var(--accent);border-radius:2px}
.bnt-burger{display:none;background:none;border:1px solid var(--line);color:var(--txt);font-size:20px;border-radius:8px;padding:4px 10px;cursor:pointer}

/* ---------- bottoni ---------- */
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:800;padding:12px 22px;border-radius:10px;text-decoration:none;font-size:14px;border:none;cursor:pointer;transition:.15s}
.btn:hover{background:var(--accent-hot);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--txt);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--card);border-color:var(--muted)}
.btn.small{padding:9px 16px;font-size:13px}
.btn.wa{background:#1faa53}
.btn.wa:hover{background:#25c25f}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 400px at 80% -10%, var(--accent-soft), transparent 60%),
  repeating-linear-gradient(115deg, transparent 0 34px, rgba(255,255,255,.018) 34px 68px), var(--bg)}
.hero-in{max-width:1200px;margin:auto;padding:72px 24px 56px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-in.solo{grid-template-columns:1fr;text-align:center;padding:56px 24px 40px}
.hero-in.solo .lead{margin-left:auto;margin-right:auto}
.tag{display:inline-block;background:var(--accent-soft);color:var(--accent-hot);border:1px solid var(--accent-line);padding:6px 14px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px}
h1{font-size:44px;line-height:1.12;font-weight:900;letter-spacing:-1px}
h1 em{color:var(--accent);font-style:normal}
.lead{color:var(--muted);margin:18px 0 26px;font-size:17px;max-width:56ch}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap}
.hero-in.solo .hero-ctas{justify-content:center}
.trust{display:flex;gap:28px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}
.trust div b{font-size:22px;color:var(--accent);display:block;font-weight:900}
.trust div span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}

/* ---------- sezioni ---------- */
section{padding:64px 24px}
section.dark{background:var(--bg2)}
.wrap{max-width:1200px;margin:auto}
.sec-head{text-align:center;max-width:680px;margin:0 auto 42px}
.sec-head h2, .split h2{font-size:31px;font-weight:900;letter-spacing:-.5px}
.sec-head h2 em, .split h2 em{color:var(--accent);font-style:normal}
.sec-head p{color:var(--muted);margin-top:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}

.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;transition:.2s}
.card:hover{border-color:var(--accent-line);transform:translateY(-3px)}
.card .ico{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent-hot);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:14px}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);margin-bottom:14px}
.credits{display:inline-block;background:var(--accent-soft);color:var(--accent-hot);font-weight:800;font-size:13px;padding:5px 12px;border-radius:8px;border:1px solid var(--accent-line)}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 22px 20px}
.step b.num{position:absolute;top:-14px;left:20px;background:var(--accent);color:#fff;width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:900}
.step h4{margin:6px 0;font-size:15px}
.step p{font-size:13px;color:var(--muted)}

.steps5{grid-template-columns:repeat(5,1fr)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split h2{margin-bottom:14px}
.split p{color:var(--muted);margin-bottom:12px}
.check{list-style:none;margin:16px 0 22px}
.check li{padding-left:28px;position:relative;margin-bottom:10px;font-size:15px}
.check li::before{content:"✓";position:absolute;left:0;color:var(--accent-hot);font-weight:900}
.panel{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px}
.panel.center{text-align:center}
.flow{display:flex;align-items:center;justify-content:center;gap:12px;margin:16px 0;font-size:24px;flex-wrap:wrap}
.flow span{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px 15px}
.flow b{color:var(--accent-hot)}
.note{font-size:13px;color:var(--muted)}

/* ---------- selettore veicoli ---------- */
.selector{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 24px 60px #0008}
.selector h3{font-size:17px;margin-bottom:4px}
.selector .sub{font-size:13px;color:var(--muted);margin-bottom:10px}
.selector label{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:700;display:block;margin:12px 0 5px}
.selector select{width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--txt);padding:11px 12px;border-radius:10px;font-size:14px}
.selector select:disabled{opacity:.45}
.result{margin-top:18px;background:var(--bg2);border:1px solid var(--accent-line);border-radius:14px;padding:16px}
.result .rname{font-size:14px;font-weight:700;margin-bottom:12px}
.bar-row{display:grid;grid-template-columns:74px 1fr 84px;gap:10px;align-items:center;font-size:12px;color:var(--muted);margin-bottom:8px}
.bar{height:10px;border-radius:6px;background:#2a3340;overflow:hidden;position:relative}
.bar i{position:absolute;left:0;top:0;bottom:0;border-radius:6px;background:#5b6673;transition:width .5s ease}
.bar.tuned i{background:linear-gradient(90deg,var(--accent),var(--accent-hot))}
.gain{color:var(--accent-hot);font-weight:800}
.delta{display:flex;gap:12px;margin-top:10px;flex-wrap:wrap}
.delta span{background:var(--accent-soft);border:1px solid var(--accent-line);color:var(--accent-hot);font-weight:800;font-size:13px;padding:6px 12px;border-radius:8px}
.result .cta{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
.est-note{font-size:11px;color:var(--muted);margin-top:10px}

/* ---------- form ---------- */
.form{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px}
.form label{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700;display:block;margin:14px 0 6px}
.form input,.form textarea,.form select{width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--txt);padding:12px;border-radius:10px;font-size:14px;font-family:inherit}
.form textarea{min-height:120px;resize:vertical}
.form .hp{position:absolute;left:-9999px}
.alert{padding:14px 18px;border-radius:12px;margin-bottom:18px;font-size:14px;font-weight:600}
.alert.ok{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.4);color:#4ade80}
.alert.err{background:var(--accent-soft);border:1px solid var(--accent-line);color:var(--accent-hot)}

/* ---------- tabelle info ---------- */
.info-list{display:grid;gap:12px}
.info-list .row{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.info-list .row .ico{font-size:20px}
.info-list .row b{display:block;font-size:14px}
.info-list .row span{font-size:13px;color:var(--muted)}

/* ---------- footer ---------- */
.bnt-footer{border-top:1px solid var(--line);padding:38px 24px 28px;color:var(--muted);font-size:13px;background:var(--bg)}
.bnt-footer .wrap{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:26px}
.bnt-footer h5{color:var(--txt);font-size:13px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px}
.bnt-footer a{color:var(--muted);text-decoration:none;display:block;margin-bottom:6px}
.bnt-footer a:hover{color:var(--txt)}
.bnt-footer .legal{grid-column:1/-1;border-top:1px solid var(--line);margin-top:18px;padding-top:16px;font-size:12px}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-in,.split{grid-template-columns:1fr}
  .grid3,.grid4,.steps{grid-template-columns:repeat(2,1fr)}
  .bnt-footer .wrap{grid-template-columns:1fr 1fr}
  h1{font-size:34px}
}
@media(max-width:640px){
  .grid3,.grid4,.steps,.grid2{grid-template-columns:1fr}
  .bnt-menu{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px}
  .bnt-menu.open{display:flex}
  .bnt-burger{display:block}
  .bnt-footer .wrap{grid-template-columns:1fr}
  section{padding:44px 18px}
  .hero-in{padding:48px 18px 40px}
}