:root{
  --bg:#0e0f12; --panel:#171a21; --muted:#9aa4b2; --text:#e5e7eb;
  --accent:#3b82f6; --accent-2:#22c55e; --border:#2a2e38;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:linear-gradient(180deg,#0e0f12 0%, #0b0c10 100%);
  color:var(--text); font:16px/1.5 "Inter",system-ui,Segoe UI,Roboto,Arial;
}

/* Topbar */
.topbar{
  max-width:1100px; margin:20px auto 10px; padding:0 16px;
  display:flex; align-items:center; justify-content:space-between;
}
.brand{display:flex; align-items:center; gap:10px}
.brand .logo{font-size:28px}
.brand h1{margin:0; font-size:22px; letter-spacing:.2px}
.nav{display:flex; gap:10px; flex-wrap:wrap}
.nav .link{
  color:#c7d2fe; text-decoration:none; border:1px solid var(--border);
  padding:8px 12px; border-radius:10px;
}
.nav .link:hover{border-color:var(--accent)}

/* Hero */
.hero{max-width:1100px; margin:10px auto 30px; padding:0 16px}
.hero h2{margin:.2em 0 .2em; font-size:28px}
.subtitle{margin:0 0 18px; color:var(--muted)}

/* Grid de cards */
.grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:16px;
}
.card{
  background:var(--panel); border:1px solid var(--border); border-radius:16px;
  padding:18px; text-decoration:none; color:var(--text);
  display:flex; flex-direction:column; gap:8px; position:relative; overflow:hidden;
  transition:transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.card:hover{
  transform:translateY(-2px);
  border-color:#3b82f6aa;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.icon{font-size:34px}
.card h3{margin:0; font-size:18px}
.card p{margin:0; color:var(--muted)}
.btn{
  align-self:flex-start; margin-top:10px; background:var(--accent);
  color:#fff; padding:8px 14px; border-radius:999px; font-weight:600;
  border:1px solid #0000;
}
.card:hover .btn{background:linear-gradient(90deg,var(--accent),var(--accent-2))}

/* Footer */
.footer{
  max-width:1100px; margin:26px auto; padding:0 16px; color:var(--muted);
  display:flex; align-items:center; justify-content:center;
  border-top:1px solid var(--border); padding-top:16px;
}

/* Responsivo */
@media (max-width:980px){
  .grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .topbar{flex-direction:column; gap:10px; align-items:flex-start}
  .grid{grid-template-columns:1fr}
}