:root{
  --bg:#0b0f19;
  --card:#11182a;
  --muted:#9aa4b2;
  --text:#e7edf6;
  --accent:#5eead4;
  --accent2:#60a5fa;
  --border:rgba(255,255,255,.10);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(900px 500px at 20% 0%, rgba(96,165,250,.25), transparent 60%),
              radial-gradient(800px 500px at 80% 10%, rgba(94,234,212,.18), transparent 55%),
              var(--bg);
  color:var(--text);
}

a{color:inherit; text-decoration:none}
a:hover{opacity:.9}

.container{max-width:1100px; margin:0 auto; padding:24px}
.nav{
  position:sticky; top:0;
  backdrop-filter: blur(10px);
  background: rgba(11,15,25,.75);
  border-bottom:1px solid var(--border);
  z-index:10;
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px;
}
.brand{
  display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:.2px;
}
.logo{
  width:34px; height:34px; border-radius:10px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}
.nav-links{display:flex; gap:14px; flex-wrap:wrap}
.nav-links a{
  padding:10px 12px;
  border:1px solid transparent;
  border-radius:12px;
  color:var(--muted);
}
.nav-links a.active, .nav-links a:hover{
  border-color: var(--border);
  color:var(--text);
}

.hero{
  padding:34px 0 10px;
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:18px;
}
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
}
.h-title{font-size:44px; line-height:1.05; margin:0}
.h-sub{color:var(--muted); margin:10px 0 0; font-size:16px; max-width:60ch}

.card{
  background: rgba(17,24,42,.75);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 12px 30px rgba(0,0,0,.25);
}

.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
}
@media (max-width: 900px){
  .grid{grid-template-columns:1fr}
}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(94,234,212,.18), rgba(96,165,250,.18));
  color: var(--text);
  font-weight:700;
  cursor:pointer;
}
.btn:hover{transform: translateY(-1px)}
.btn:disabled{opacity:.55; cursor:not-allowed; transform:none}

.kicker{color:var(--muted); font-weight:600; font-size:13px; letter-spacing:.2px}
.h2{margin:0; font-size:22px}
.small{color:var(--muted); font-size:14px}

form label{display:block; margin-top:12px; margin-bottom:6px; font-weight:650}
input, select, textarea{
  width:100%;
  padding:12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(11,15,25,.55);
  color: var(--text);
  outline:none;
}
input::placeholder, textarea::placeholder{color: rgba(154,164,178,.75)}
.row{display:grid; grid-template-columns:1fr 1fr; gap:12px}
@media (max-width: 700px){.row{grid-template-columns:1fr}}

pre{
  white-space:pre-wrap;
  word-break:break-word;
  background: rgba(11,15,25,.65);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px;
  margin:0;
}

.footer{
  margin-top:40px;
  padding:22px 0 10px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:14px;
}
.footer a{color:var(--text)}
/* Mobile polish */
@media (max-width: 600px) {
  .h-title {
    font-size: 32px;
  }

  .h-sub {
    font-size: 15px;
  }

  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .nav-links {
    gap: 8px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .container {
    padding: 16px;
  }
}