:root{
  --bg:#0b0f14; --panel:#121821; --muted:#a7b1c2; --text:#e8eef7;
  --brand:#2dd4bf; --accent:#60a5fa; --danger:#f87171;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif;background:var(--bg);color:var(--text)}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.page{min-height:100svh;display:flex;flex-direction:column}
main{flex:1}
section{scroll-margin-top:84px}
.header{position:sticky;top:0;z-index:60;background:rgba(11,15,20,.85);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;position:relative}
.menu-btn{display:none;background:transparent;border:1px solid rgba(255,255,255,.25);color:var(--text);padding:8px 12px;border-radius:10px;cursor:pointer}
.nav-links{display:flex;align-items:center;gap:10px}
.nav-links a{color:var(--muted);text-decoration:none;font-weight:500;white-space:nowrap}
.nav-links a:hover{color:var(--text)}
.btn{display:inline-block;background:var(--brand);color:#002;padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:700;border:0;cursor:pointer}
.btn.alt{background:var(--accent);color:#001}
.btn.ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,.2)}
.only-mobile{display:none}
.hero{padding:68px 0 36px;border-bottom:1px solid rgba(255,255,255,.06)}
h1{font-size:clamp(28px,4vw + 1rem,44px);line-height:1.05;margin:0 0 10px}
h2{font-size:clamp(22px,2.2vw + .5rem,30px);margin:24px 0 12px}
p.lead{color:var(--muted);font-size:18px;max-width:760px}
.badge{font-size:12px;color:var(--muted)}
.grid{display:grid;gap:14px}
.grid.features{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{background:var(--panel);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:16px}
.section{padding:40px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.kv{display:flex;gap:10px;align-items:center;margin:8px 0}
.kv b{color:var(--text)} .kv span{color:var(--muted)}
.list{margin:0;padding-left:18px;color:var(--muted)}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row .half{flex:1 1 320px}
.input, textarea, select{width:100%;padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,.2);background:#0e141c;color:var(--text)}
label{display:block;margin:8px 0 6px;color:var(--muted);font-size:14px}
small.help,.note{color:var(--muted);font-size:13px}
footer{padding:28px 0;color:var(--muted)}
.success{background:#052;border:1px solid #0a5;color:#d9ffeb;padding:12px 14px;border-radius:10px}
.error{background:#2b0b0b;border:1px solid #b33;color:#ffd5d5;padding:12px 14px;border-radius:10px}
hr{border:0;border-top:1px solid rgba(255,255,255,.06);margin:16px 0}
ul.inline{display:flex;gap:10px;list-style:none;margin:8px 0 0;padding:0;flex-wrap:wrap}
ul.inline li{background:rgba(255,255,255,.06);padding:6px 10px;border-radius:999px;font-size:12px;color:var(--muted)}
.footer-links{display:flex;gap:10px;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--text)}

/* Mobile */
@media (max-width: 860px){
  .menu-btn{display:inline-block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(11,15,20,.98);
    border:1px solid rgba(255,255,255,.06);border-radius:12px;padding:10px;margin-top:8px}
  .nav-links.open{display:block}
  .nav-links a{display:block;padding:10px;border-radius:8px}
  .only-mobile{display:block}
  .header .nav .row{display:none}
}
@media (max-width: 768px){
  .hero{padding:48px 0 28px}
  .row .half{flex:1 1 100%}
  .grid.features{grid-template-columns:1fr 1fr}
}
@media (max-width: 520px){
  .grid.features{grid-template-columns:1fr}
}


/* Force-hide mobile menu button on desktop */
@media (min-width: 861px){
  .menu-btn{ display:none !important; }
  .nav-links{ display:flex !important; }
}


/* Accessibility helpers */
.skip-link{position:absolute;top:-40px;left:8px;background:var(--text);color:var(--bg);padding:8px 12px;border-radius:8px;z-index:1000;}
.skip-link:focus,.skip-link:focus-visible{top:8px;outline:3px solid currentColor;}
:where(a,button,input,select,textarea):focus-visible{outline:3px solid #88b6ff;outline-offset:2px;box-shadow:0 0 0 2px rgba(136,182,255,0.35);}