:root{
  --bg:#071C2E;
  --card:#0D253A;
  --glass:rgba(255,255,255,0.06);
  --text:#E6F1F8;
  --muted:#B7C0C8;
  --accent:#1ED6CB;
  --accent2:#1AA7A1;
  --ring:rgba(30,214,203,0.35);
}
:root.light{
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --glass:rgba(0,0,0,0.04);
  --text:#0E1720;
  --muted:#6B7B88;
  --accent:#0FB5AC;
  --accent2:#0C8E88;
  --ring:rgba(15,181,172,0.25);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  background-image:
    radial-gradient(1200px 600px at 20% -10%, rgba(30,214,203,0.12), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(18,84,120,0.35), transparent 60%);
  background-blend-mode: screen;
}

.container{max-width:1100px;margin:0 auto;padding:0 20px}
.container.narrow{max-width:800px}

.site-header{
  position:sticky; top:0; z-index:10;
  background: linear-gradient(180deg, rgba(7,28,46,0.95), rgba(7,28,46,0.75));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
:root.light .site-header{
  background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(255,255,255,0.85));
  border-bottom-color: rgba(0,0,0,0.06);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand img{height:44px;display:block}
.links a{
  color: var(--muted); text-decoration:none; margin-left:18px; font-weight:500;
}
.links a:hover{color:var(--text)}
.links .cta{
  padding:8px 14px; border:1px solid rgba(255,255,255,0.15); border-radius:10px;
}
.theme-toggle{
  margin-left:16px;
  display:inline-flex; align-items:center; gap:8px;
  color:var(--muted);
  cursor:pointer;
}
.theme-toggle button{
  border:1px solid rgba(255,255,255,0.15);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding:6px 12px;
}
:root.light .theme-toggle button{
  border-color: rgba(0,0,0,0.1);
}

.hero{padding:80px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:40px;align-items:center}
.hero h1{font-size:42px; line-height:1.2; margin:0 0 10px}
.lead{font-size:18px; color:var(--muted)}
.hero-ctas{margin:24px 0 8px}
.btn{
  display:inline-block; padding:12px 18px; border-radius:14px; text-decoration:none; font-weight:600;
  border:1px solid rgba(255,255,255,0.1);
}
.btn.primary{background:linear-gradient(135deg, var(--accent), var(--accent2)); color:#052225; border:none}
.btn.ghost{color:var(--text)}
.subtle{color:#9FB0BD}

.hero-art .glass{
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  border:1px solid rgba(255,255,255,0.08);
  border-radius:18px; padding:16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.08);
}
:root.light .hero-art .glass{
  background: linear-gradient(180deg, rgba(0,0,0,0.04), rgba(0,0,0,0.02));
  border-color: rgba(0,0,0,0.06);
  box-shadow: 0 20px 60px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.5);
}
.hero-art .code{
  background: #0A1B2A; border-radius:12px; padding:18px;
  outline: 1px solid rgba(255,255,255,0.05);
}
:root.light .hero-art .code{
  background:#F1F5F9; outline-color: rgba(0,0,0,0.06);
}
pre{margin:0; overflow:auto}
code{font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; color:#CFE8FF}
:root.light code{color:#183A58}

.about{padding:60px 0}
.about h2, .why h2, .updates h2, .contact h2{font-size:28px;margin:0 0 10px}

.why{padding:20px 0 60px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:14px}
.card{
  background: var(--card);
  border:1px solid rgba(255,255,255,0.06);
  border-radius:16px; padding:16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
:root.light .card{
  border-color: rgba(0,0,0,0.06);
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
}
.card h3{margin:0 0 6px}
.card p{margin:0;color:#C9D6E1}
:root.light .card p{color:#446176}

.updates{padding:50px 0}
.signup{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.input{
  background: var(--card);
  color: var(--text);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:12px;
  padding:12px 14px;
  min-width: 280px;
  outline: none;
}
:root.light .input{border-color: rgba(0,0,0,0.1)}
.form-note{font-size:13px;color:#9FB0BD}
.success{color:#3BE1D6}
.error{color:#FF7070}

.contact{padding:20px 0 80px}

.site-footer{padding:22px 0;border-top:1px solid rgba(255,255,255,0.06)}
.site-footer p{margin:0;color:#87A0B1}

@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr;gap:24px}
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 560px){
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:34px}
}