:root{
  --bg:#0f1720;
  --card:rgba(255,255,255,0.06);
  --muted:rgba(255,255,255,0.7);
  --accent1:#7b61ff;
  --accent2:#3ddc97;
  --glass:rgba(255,255,255,0.04);
  --radius:12px;
  --max-width:1100px;
  color-scheme: dark;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background:linear-gradient(180deg,var(--bg) 0%, #07101a 100%);
  color:#e8eef6;line-height:1.45;
}
.container{max-width:var(--max-width);margin:0 auto;padding:28px}
.site-header{backdrop-filter: blur(6px);position:sticky;top:0;z-index:40;background:linear-gradient(180deg,rgba(0,0,0,0.12),transparent)}
.header-inner{display:flex;align-items:center;gap:16px}
.brand{font-weight:700;color:var(--accent1);text-decoration:none;font-size:1.25rem}
.brand .dot{color:var(--accent2)}
.nav{margin-left:18px;display:flex;gap:12px}
.nav a{color:var(--muted);text-decoration:none;padding:8px;border-radius:8px}
.nav a:hover{color:white;background:rgba(255,255,255,0.03)}
.controls{margin-left:auto;display:flex;gap:8px}
.nav-toggle{display:none}

.hero{padding:48px 0}
.hero-inner{display:grid;grid-template-columns:1fr 420px;gap:28px;align-items:center}
.hero-copy h1{font-size:2.1rem;margin:0 0 12px}
.hero-copy p{color:var(--muted);margin:0 0 18px}
.hero-visual .mock{width:100%;height:100%;max-width:420px}

.btn{display:inline-block;padding:10px 16px;border-radius:10px;text-decoration:none;border:0;cursor:pointer}
.btn.primary{background:linear-gradient(90deg,var(--accent1),var(--accent2));color:#061018;box-shadow:0 6px 18px rgba(59,220,151,0.12)}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted)}

.features{padding:36px 0}
.section-title{margin:6px 0 18px;font-size:1.3rem}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--glass);padding:18px;border-radius:var(--radius);box-shadow:0 6px 24px rgba(2,6,23,0.6)}
.card h3{margin-top:0}

.about{padding:36px 0}

.contact{padding:36px 0}
.contact-form{display:grid;gap:12px;max-width:640px}
.contact-form label{display:block}
.contact-form input,.contact-form textarea{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit}
.form-actions{display:flex;gap:12px}
.form-result{margin-top:6px;color:var(--accent2)}

.site-footer{padding:20px 0;border-top:1px solid rgba(255,255,255,0.02);color:var(--muted)}
.footer-inner{display:flex;justify-content:space-between;gap:12px;align-items:center}
.small{font-size:0.85rem}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .nav{display:none}
  .nav-toggle{display:inline-block}
}

/* Light theme overrides (applied by .light on html) */
html.light{color-scheme:light}
html.light :root{--bg:#f3f6fb;--card:#0c1720;--muted:#273043}
html.light body{background:linear-gradient(180deg,#f8fbff,#eef6ff)}
html.light .card{background:linear-gradient(180deg,#ffffff,#f6fbff);box-shadow:0 6px 20px rgba(10,20,40,0.04)}
html.light .brand{color:var(--accent1)}