:root{
  --sky-1:#e0f2fe;--sky-2:#bae6fd;--sky-3:#7dd3fc;--sky-4:#0ea5e9;--sky-5:#0369a1;
  --ink:#0b1220;--ink-2:#1e293b;--muted:#334155;--card:#ffffff;--border:#bae6fd;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{font-family:'Segoe UI',Roboto,system-ui,sans-serif;color:var(--ink);background:linear-gradient(180deg,#f0f9ff 0%,#e0f2fe 100%);line-height:1.55}
a{text-decoration:none;color:var(--sky-5)}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Navbar */
.nav{background:#fff;border-bottom:3px solid var(--sky-3);position:sticky;top:0;z-index:50;box-shadow:0 2px 10px rgba(14,165,233,.1)}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;max-width:1200px;margin:0 auto}
.logo{font-size:24px;font-weight:800;color:var(--sky-5);display:flex;align-items:center;gap:8px}
.logo span{background:var(--sky-4);color:#fff;padding:4px 10px;border-radius:8px}
.nav ul{display:flex;gap:24px;list-style:none}
.nav ul a{color:var(--ink);font-weight:600}
.nav ul a:hover{color:var(--sky-4)}

/* Hero */
.hero{position:relative;background:linear-gradient(135deg,var(--sky-3),var(--sky-4));padding:0;overflow:hidden}
.hero img{width:100%;max-height:480px;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,105,161,.55),transparent 60%);display:flex;align-items:center}
.hero-text{padding:40px;max-width:600px;color:#fff}
.hero-text h1{font-size:48px;font-weight:900;margin-bottom:12px;text-shadow:0 2px 8px rgba(0,0,0,.3)}
.hero-text p{font-size:18px;margin-bottom:20px}
.btn{display:inline-block;background:#fff;color:var(--sky-5);padding:12px 28px;border-radius:30px;font-weight:700;border:none;cursor:pointer;font-size:16px;transition:.2s;box-shadow:0 4px 14px rgba(0,0,0,.15)}
.btn:hover{transform:translateY(-2px);background:var(--sky-1)}
.btn-primary{background:var(--sky-4);color:#fff}
.btn-primary:hover{background:var(--sky-5);color:#fff}

/* Section */
section{padding:60px 0}
.section-title{text-align:center;font-size:34px;font-weight:800;color:var(--ink);margin-bottom:10px}
.section-sub{text-align:center;color:var(--muted);margin-bottom:40px;font-size:16px}

/* Features strip */
.features{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat{text-align:center;padding:20px}
.feat .ic{width:60px;height:60px;border-radius:50%;background:var(--sky-1);color:var(--sky-5);font-size:28px;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;border:2px solid var(--sky-3)}
.feat h4{color:var(--ink);font-size:16px;margin-bottom:4px}
.feat p{color:var(--muted);font-size:14px}

/* Code grid */
.codes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px}
.code-card{background:#fff;border:2px solid var(--sky-2);border-radius:14px;padding:18px;text-align:center;transition:.25s;color:var(--ink)}
.code-card:hover{transform:translateY(-4px);border-color:var(--sky-4);box-shadow:0 10px 24px rgba(14,165,233,.18)}
.code-card .ico{width:64px;height:64px;border-radius:14px;background:linear-gradient(135deg,var(--sky-3),var(--sky-4));color:#fff;font-size:30px;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:800}
.code-card h3{font-size:17px;color:var(--ink);margin-bottom:4px}
.code-card p{font-size:13px;color:var(--muted);margin-bottom:12px}
.code-card .badge{display:inline-block;background:var(--sky-1);color:var(--sky-5);font-size:11px;padding:3px 10px;border-radius:20px;margin-bottom:10px;font-weight:700}
.code-card .btn{padding:9px 20px;font-size:14px;width:100%}

/* About */
.about{background:#fff}
.about-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.about p{color:var(--muted);margin-bottom:14px}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:20px}
.stat{background:var(--sky-1);border:1px solid var(--sky-2);border-radius:12px;padding:18px;text-align:center}
.stat b{display:block;font-size:28px;color:var(--sky-5)}
.stat span{font-size:13px;color:var(--muted)}

/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step-card{background:#fff;border-radius:14px;padding:24px;border:2px solid var(--sky-2);text-align:center}
.step-card .num{width:46px;height:46px;border-radius:50%;background:var(--sky-4);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:20px}
.step-card h4{color:var(--ink);margin-bottom:6px}
.step-card p{color:var(--muted);font-size:14px}

/* Testimonials */
.test-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.test{background:#fff;border-left:4px solid var(--sky-4);padding:20px;border-radius:8px;box-shadow:0 4px 12px rgba(14,165,233,.08)}
.test p{color:var(--ink-2);font-style:italic;margin-bottom:12px}
.test b{color:var(--sky-5);font-size:14px}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--sky-2);border-radius:10px;padding:16px 20px;margin-bottom:10px}
.faq-item h4{color:var(--ink);margin-bottom:6px;font-size:16px}
.faq-item p{color:var(--muted);font-size:14px}

/* Footer */
footer{background:var(--ink);color:#cbd5e1;padding:40px 0 20px;margin-top:40px}
footer .container{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
footer h4{color:#fff;margin-bottom:12px;font-size:16px}
footer a{color:#cbd5e1;display:block;padding:4px 0;font-size:14px}
footer a:hover{color:var(--sky-3)}
.copy{text-align:center;border-top:1px solid #1e293b;margin-top:30px;padding-top:18px;font-size:13px;color:#94a3b8}

/* Unlock page */
.unlock-wrap{max-width:760px;margin:50px auto;background:#fff;border-radius:18px;padding:40px;box-shadow:0 10px 40px rgba(14,165,233,.15);border:2px solid var(--sky-2)}
.progress{height:10px;background:var(--sky-1);border-radius:10px;overflow:hidden;margin:20px 0 30px}
.progress > div{height:100%;background:linear-gradient(90deg,var(--sky-3),var(--sky-4));transition:.4s}
.unlock-wrap h1{color:var(--ink);font-size:28px;margin-bottom:8px;text-align:center}
.unlock-wrap .sub{color:var(--muted);text-align:center;margin-bottom:10px}
.ad-box{background:linear-gradient(135deg,var(--sky-1),#fff);border:2px dashed var(--sky-3);border-radius:12px;padding:30px;text-align:center;margin:24px 0;color:var(--ink-2)}
.ad-box h3{color:var(--sky-5);margin-bottom:8px}
.nav-btns{display:flex;justify-content:space-between;gap:12px;margin-top:24px}
.nav-btns .btn{flex:1;text-align:center}
.tip-list{background:var(--sky-1);border-radius:10px;padding:16px 22px;color:var(--ink-2)}
.tip-list li{margin:6px 0}

/* Reward */
.reward-box{max-width:600px;margin:60px auto;background:#fff;border-radius:18px;padding:40px;text-align:center;border:3px solid var(--sky-4);box-shadow:0 10px 40px rgba(14,165,233,.25)}
.reward-box .big-ic{font-size:60px;margin-bottom:10px}
.reward-box h1{color:var(--ink);margin-bottom:6px}
.reward-box p{color:var(--muted);margin-bottom:20px}
.code-display{background:linear-gradient(135deg,var(--sky-4),var(--sky-5));color:#fff;font-size:26px;font-weight:800;letter-spacing:3px;padding:22px;border-radius:12px;margin:20px 0;font-family:'Courier New',monospace;word-break:break-all}

/* Promo Banner */
.promo-banner{max-width:1200px;margin:40px auto 0;padding:0 20px}
.promo-banner a{display:block;background:linear-gradient(135deg,#0284c7 0%,var(--sky-4) 40%,#0369a1 100%);border-radius:20px;padding:28px 36px;color:#fff;text-decoration:none;position:relative;overflow:hidden;box-shadow:0 12px 32px rgba(14,165,233,.4);transition:.3s;min-height:180px}
.promo-banner a:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(14,165,233,.55)}
.promo-banner a::before{content:"";position:absolute;top:-60px;right:-60px;width:220px;height:220px;background:rgba(255,255,255,.12);border-radius:50%}
.promo-banner a::after{content:"";position:absolute;bottom:-40px;left:30%;width:160px;height:160px;background:rgba(255,255,255,.08);border-radius:50%}
.promo-inner{display:flex;align-items:center;gap:30px;position:relative;z-index:1;flex-wrap:wrap}
.promo-iphone{width:200px;height:auto;flex-shrink:0;filter:drop-shadow(0 14px 24px rgba(0,0,0,.35));transform:rotate(-8deg);transition:.3s}
.promo-banner a:hover .promo-iphone{transform:rotate(-4deg) scale(1.05)}
.promo-text{flex:1;min-width:240px}
.promo-tag{display:inline-block;background:rgba(255,255,255,.18);backdrop-filter:blur(4px);color:#fff;font-size:11px;font-weight:700;letter-spacing:2px;padding:5px 12px;border-radius:20px;margin-bottom:10px;text-transform:uppercase}
.promo-text b{display:block;font-size:28px;margin-bottom:6px;line-height:1.2;text-shadow:0 2px 8px rgba(0,0,0,.2)}
.promo-text span{font-size:15px;opacity:.95;display:block;margin-bottom:4px}
.promo-cta{background:#fff;color:var(--sky-5);padding:14px 28px;border-radius:30px;font-weight:800;font-size:15px;white-space:nowrap;box-shadow:0 6px 16px rgba(0,0,0,.18)}
.promo-banner a:hover .promo-cta{background:var(--sky-1);transform:scale(1.05)}
@media(max-width:700px){.promo-inner{flex-direction:column;text-align:center;gap:18px}.promo-iphone{width:160px;transform:rotate(0)}.promo-text b{font-size:22px}}

@media(max-width:768px){
  .nav ul{display:none}
  .hero-text h1{font-size:30px}
  .hero-text{padding:24px}
  .feat-grid,.steps-grid,.test-grid,footer .container{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .section-title{font-size:26px}
}