/* Base styles */
:root{
  --bg:#0b1020; /* deep navy */
  --bg-alt:#0f1530;
  --text:#e5e7eb; /* gray-200 */
  --muted:#b6c2d9;
  --primary:#3b82f6;
  --primary-2:#0ea5ea;
  --card:#121933;
  --border:#223056;
  --accent:#7d9cff;
  --success:#22c55e;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:system-ui,-apple-system,Segoe UI,Roboto,Pretendard,Apple SD Gothic Neo,Noto Sans KR,Malgun Gothic,sans-serif;
  background:radial-gradient(1200px 600px at 70% 10%, rgba(61,120,250,.15), transparent 60%),
            radial-gradient(800px 400px at 20% 0%, rgba(14,165,234,.15), transparent 60%),
            var(--bg);
  color:var(--text);
  line-height:1.6;
}
img{max-width:100%;height:auto}
.container{width:min(1120px, 92%); margin:0 auto}
.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;background:#fff;color:#111;padding:.5rem .75rem;border-radius:.5rem;z-index:1000}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.7);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.8rem 0}
.brand{display:flex;align-items:center;gap:.6rem;color:#fff;text-decoration:none;font-weight:700}
.logo-box{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:.7rem;font-weight:800;letter-spacing:.5px;background:linear-gradient(135deg, var(--primary-2), var(--primary));color:#0b1020;filter:drop-shadow(0 6px 14px rgba(61,120,250,.35))}
.logo-box.small{width:28px;height:28px;border-radius:.6rem;font-size:.8rem}
.brand-text{letter-spacing:.2px}
.site-nav .nav-list{display:flex;gap:1rem;list-style:none;margin:0;padding:0;align-items:center}
.site-nav a{color:var(--text);text-decoration:none}
.site-nav a:hover{color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:.4rem .6rem;border-radius:.5rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:.7rem;padding:.75rem 1rem;border:1px solid var(--border);text-decoration:none;color:#fff}
.btn-small{padding:.5rem .7rem}
.btn-primary{background:linear-gradient(135deg, var(--primary-2), var(--primary));border-color:transparent}
.btn-primary:hover{filter:brightness(1.1)}
.btn-outline{background:transparent}
.btn-outline:hover{background:rgba(255,255,255,.06)}

/* Hero */
.hero{padding:72px 0 32px;border-bottom:1px solid rgba(255,255,255,.06)}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center}
.hero .lead{color:var(--muted);font-size:1.1rem}
.cta-row{display:flex;gap:.8rem;margin:1rem 0 1.25rem}
.trust-badges{display:flex;gap:1rem;list-style:none;margin:0;padding:0;color:#cbd5e1;font-size:.95rem}
.hero-art{position:relative}
.hero-art-visual{width:100%;height:320px;border-radius:1.2rem;background:
  radial-gradient(200px 120px at 20% 20%, rgba(59,130,246,.35), transparent 60%),
  radial-gradient(260px 160px at 80% 60%, rgba(14,165,234,.28), transparent 55%),
  linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,0));
position:relative;overflow:hidden;border:1px solid var(--border)}
.hero-art-visual:before,
.hero-art-visual:after{content:"";position:absolute;left:-10%;right:-10%;height:2px;background:linear-gradient(90deg, rgba(14,165,234,.8), rgba(59,130,246,.8));opacity:.7}
.hero-art-visual:before{top:35%;filter:blur(.2px)}
.hero-art-visual:after{top:55%;opacity:.5}
.hero-art-visual .wave{position:absolute;left:-10%;right:-10%;height:1px;background:linear-gradient(90deg, rgba(14,165,234,.6), rgba(59,130,246,.6));opacity:.45}

/* Section */
.section{padding:64px 0}
.section.alt{background:linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0))}
.section-header{margin-bottom:1.5rem}
.section-header h2{margin:.2rem 0 .25rem;font-size:1.9rem}
.section-header p{margin:0;color:var(--muted)}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.feature{background:var(--card);border:1px solid var(--border);border-radius:1rem;padding:1rem}
.icon-dot{width:12px;height:12px;border-radius:50%;background:radial-gradient(circle at 30% 30%, #cfe0ff, #7d9cff);box-shadow:0 0 0 6px rgba(125,156,255,.08), 0 6px 18px rgba(125,156,255,.25)}
.feature h3{margin:.6rem 0 .4rem}
.feature p{margin:0;color:#cbd5e1}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:.75rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:1rem;padding:1.1rem;position:relative}
.card.popular{border-color:var(--accent);box-shadow:0 10px 30px rgba(125,156,255,.18)}
.ribbon{position:absolute;top:12px;right:-8px;background:var(--accent);color:#0b1020;padding:.2rem .6rem;border-top-left-radius:.4rem;border-bottom-left-radius:.4rem;font-weight:700}
.card .price{font-size:1.8rem;margin:.4rem 0;color:#fff}
.card .features{list-style:none;margin:.6rem 0 1rem;padding:0;color:#cbd5e1}
.card .features li{margin:.3rem 0}

/* Testimonials */
.testimonials{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.quote{margin:0;background:var(--card);border:1px solid var(--border);padding:1rem;border-radius:1rem}
.quote blockquote{margin:0 0 .5rem;font-size:1.05rem}
.quote figcaption{color:#cbd5e1}

/* FAQ */
.faq details{background:var(--card);border:1px solid var(--border);padding:1rem;border-radius:1rem}
.faq details+details{margin-top:.8rem}
.faq summary{cursor:pointer;color:#fff}
.faq p{color:#cbd5e1;margin:.6rem 0 0}

/* Contact */
.contact-form{max-width:720px}
.form-row{display:flex;flex-direction:column;margin-bottom:.9rem}
label{font-weight:600;margin-bottom:.35rem}
input,select,textarea{background:#0d1430;border:1px solid var(--border);color:#e6ebff;padding:.65rem .75rem;border-radius:.6rem;font:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(61,120,250,.5);outline-offset:1px}
.form-actions{display:flex;gap:.6rem;align-items:center}

/* Footer */
.site-footer{border-top:1px solid rgba(255,255,255,.06);padding:24px 0;background:rgba(8,12,26,.6)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.footer-brand{display:flex;align-items:center;gap:.5rem;color:#cbd5e1}
.footer-links{list-style:none;display:flex;gap:1rem;margin:0;padding:0}
.footer-links a{color:#cbd5e1;text-decoration:none}
.footer-links a:hover{color:#fff}

/* Utilities */
.hidden{display:none}

/* Responsive */
@media (max-width: 960px){
  .hero-inner{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr 1fr}
  .pricing-grid{grid-template-columns:1fr}
  .testimonials{grid-template-columns:1fr}
}
@media (max-width: 760px){
  .site-nav .nav-list{display:none;position:absolute;right:4%;top:64px;background:var(--card);border:1px solid var(--border);border-radius:.8rem;padding:.6rem;width:min(260px, 92%);flex-direction:column}
  .nav-toggle{display:inline-flex}
  .site-header{padding:0 .4rem}
}