:root{--bg:#f6f8fb;--card:#fff;--ink:#1a2233;--muted:#5a6477;--accent:#3b6ef5;--accent-d:#2a53c9;--border:#e3e8f0;--radius:12px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.container{width:100%;max-width:1100px;margin:0 auto;padding:0 20px}
.narrow{max-width:720px}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.2}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-weight:800;font-size:1.4rem}
.logo span{color:var(--accent)}
.main-nav ul{display:flex;gap:6px;list-style:none}
.main-nav a{display:block;padding:10px 16px;border-radius:8px;font-weight:500;color:var(--muted);transition:.2s}
.main-nav a:hover{background:#eef2fb;color:var(--ink)}
.main-nav a.active{color:var(--accent);background:#eaf0ff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:26px;height:3px;background:var(--ink);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* Hero */
.hero{background:linear-gradient(135deg,#eaf0ff,#f6f8fb);padding:80px 0}
.hero-inner{max-width:760px}
.hero h1{font-size:2.6rem;font-weight:800;margin-bottom:16px}
.lead{font-size:1.15rem;color:var(--muted);margin-bottom:28px}

/* Sections */
.section{padding:64px 0}
.page-head{padding:56px 0 20px;background:linear-gradient(135deg,#eaf0ff,#f6f8fb)}
.page-head h1{font-size:2.2rem;margin-bottom:10px}
.section-title{text-align:center;font-size:1.8rem;margin-bottom:40px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(30,50,90,.1)}
.card-icon{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:10px;background:#eaf0ff;color:var(--accent);font-weight:700;margin-bottom:16px}
.card h3{margin-bottom:10px}
.card p{color:var(--muted)}

/* Buttons */
.btn{display:inline-block;padding:13px 26px;border-radius:10px;font-weight:600;font-size:1rem;cursor:pointer;border:2px solid transparent;transition:.2s;text-align:center}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d)}
.btn-secondary{background:#fff;color:var(--accent);border-color:var(--accent)}
.btn-secondary:hover{background:#eaf0ff}
.btn-group{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.btn-group.center{justify-content:center;margin-top:40px}

/* Form */
.form{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.field{margin-bottom:18px;display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:.95rem}
.field input,.field textarea{padding:12px 14px;border:1px solid var(--border);border-radius:8px;font:inherit;background:#fbfcfe}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,110,245,.15)}
.alert{padding:14px 18px;border-radius:8px;margin-bottom:20px;font-weight:500}
.alert.success{background:#e4f8ec;color:#1a7a43}
.alert.error{background:#fdeaea;color:#c0392b}
.narrow p{margin-bottom:16px;color:var(--muted)}

/* Footer */
.site-footer{background:#141b2b;color:#c7cfdd;margin-top:40px}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding:48px 20px}
.site-footer .logo{color:#fff}
.site-footer p{color:#8e99ad;margin-top:8px}
.footer-nav{display:flex;flex-direction:column;gap:10px}
.footer-nav a{color:#c7cfdd;transition:.2s}
.footer-nav a:hover{color:#fff}
.footer-bottom{border-top:1px solid #26314a;padding:18px 0;font-size:.9rem;color:#8e99ad;text-align:center}

@media(max-width:768px){
  .nav-toggle{display:flex}
  .main-nav{position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);max-height:0;overflow:hidden;transition:max-height .3s}
  .main-nav.open{max-height:360px}
  .main-nav ul{flex-direction:column;padding:12px}
  .main-nav a{padding:14px}
  .hero h1{font-size:2rem}
  .hero{padding:56px 0}
}