/* Modern, visually appealing, responsive styles */
:root{
    --bg:#0b0e13;
    --card:#121722;
    --muted:#a8b3c7;
    --text:#e6ebf5;
    --brand:#64d2ff;
    --brand-hover:#7ee0ff;
    --brand-ink:#012331;
    --border:#1d2431;
    --accent-gradient:linear-gradient(135deg, #64d2ff 0%, #4facff 100%);
    --card-hover:#161d2b;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif}
a{color:var(--brand);text-decoration:none;transition:all 0.2s ease}
a:hover{color:var(--brand-hover);text-decoration:underline}
.container{max-width:980px;margin:0 auto;padding:32px 24px}
.site-header{border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(11,14,19,.95);backdrop-filter:saturate(140%) blur(12px);z-index:10;box-shadow:0 1px 3px rgba(0,0,0,0.2)}
.nav{display:flex;align-items:center;gap:16px;padding:16px 0}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px;transition:transform 0.2s ease}
.logo:hover{transform:translateY(-2px)}
.logo img{filter:drop-shadow(0 0 8px rgba(100,210,255,0.3))}
.nav-links{margin-left:auto;display:flex;gap:24px;list-style:none;padding:0;margin:0}
.nav-links a{font-weight:500;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--brand);transition:width 0.3s ease}
.nav-links a:hover::after{width:100%}
.nav-links a:hover{text-decoration:none}
#menu-toggle,.burger{display:none}
@media (max-width:720px){
    .nav-links{display:none}
    #menu-toggle:checked + label + .nav-links{display:flex;flex-direction:column;position:absolute;right:16px;top:64px;background:var(--card);padding:16px;border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,0.4);animation:slideDown 0.2s ease}
    .burger{display:block;margin-left:auto;cursor:pointer;font-size:24px}
}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
.hero{padding:80px 24px 60px;text-align:center;background:radial-gradient(ellipse at top, rgba(100,210,255,0.08) 0%, transparent 60%)}
h1{font-size:clamp(32px,5vw,48px);line-height:1.15;margin:0 0 16px;font-weight:800;background:linear-gradient(135deg,#e6ebf5 0%,#64d2ff 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
h2{font-size:clamp(24px,4vw,32px);margin:32px 0 16px;font-weight:700}
h3{font-size:clamp(18px,2.5vw,22px);margin:0 0 8px;font-weight:600;color:var(--brand)}
.lede{color:var(--muted);font-size:clamp(16px,2vw,20px);max-width:64ch;margin:0 auto 24px;line-height:1.6}
.note{color:var(--muted);font-size:14px;margin-top:12px;opacity:0.8}
.cta-row{display:flex;gap:12px;margin:28px 0;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:12px;border:1px solid var(--border);background:transparent;color:var(--text);font-weight:600;transition:all 0.3s ease;cursor:pointer;font-size:16px}
.btn.primary{background:var(--accent-gradient);color:var(--brand-ink);border:none;box-shadow:0 4px 12px rgba(100,210,255,0.25);transform:translateY(0)}
.btn.primary:hover{box-shadow:0 6px 20px rgba(100,210,255,0.4);transform:translateY(-2px)}
.btn.ghost{background:transparent;border:1px solid var(--brand)}
.btn.ghost:hover{background:rgba(100,210,255,0.1);border-color:var(--brand-hover)}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;transition:all 0.3s ease}
.card:hover{border-color:rgba(100,210,255,0.3);background:var(--card-hover);box-shadow:0 4px 16px rgba(0,0,0,0.2)}
.card ul{line-height:1.8;color:var(--muted)}
.card ul li{margin-bottom:8px}
.card strong{color:var(--brand);font-weight:600}
.features{margin:40px 0;padding:0}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;max-width:980px;margin:0 auto;padding:0 24px}
@media (max-width:720px){.features-grid{grid-template-columns:1fr;gap:16px}}
#problems,#introducing{margin:40px auto}
#contact{text-align:center;padding:60px 24px;background:radial-gradient(ellipse at center, rgba(100,210,255,0.05) 0%, transparent 70%)}
#contact h2{margin-bottom:20px}
#contact p{font-size:18px;margin:12px 0}
.form-wrap{max-width:760px;margin:40px auto}
.form input,.form select,.form textarea{width:100%;margin-top:8px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:#0f141d;color:var(--text);transition:all 0.2s ease;font-size:15px}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(100,210,255,0.1)}
.form label{display:block;margin:14px 0;font-weight:500}
.form .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media (max-width:720px){.form .grid-2{grid-template-columns:1fr}}
.form .check{display:flex;align-items:center;gap:10px}
.form button[type="submit"]{width:100%;margin-top:20px}
.hidden{display:none}
.tiny{font-size:13px;color:var(--muted);line-height:1.5}
.prose p, .prose li{color:var(--muted)}
.download{text-align:center;padding:40px}
.site-footer{border-top:1px solid var(--border);margin-top:80px;padding:32px 0;background:rgba(0,0,0,0.2)}
.footer-grid{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-nav{display:flex;gap:20px}
code{background:#0f141d;border:1px solid var(--border);padding:3px 8px;border-radius:6px;font-size:14px;font-family:'Courier New',monospace}

/* Smooth scroll offset for sticky header */
:target{scroll-margin-top:80px}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce){
    *{animation:none!important;transition:none!important}
}

/* Print styles */
@media print{
    .site-header,.site-footer,.cta-row{display:none}
    body{background:white;color:black}
    .card{border:1px solid #ccc;page-break-inside:avoid}
}