body{
  background:#0f172a;
  color:white;
  font-family:Arial,sans-serif;
  margin:0;
}
.navbar{
  background:#111827;
  padding:15px;
}
.navbar a{
  color:white;
  margin-right:15px;
  text-decoration:none;
}
.container{
  max-width:1000px;
  margin:auto;
  padding:40px;
}
.btn{
  display:inline-block;
  padding:12px 20px;
  background:#2563eb;
  color:white;
  text-decoration:none;
  border:none;
  border-radius:10px;
  margin-top:10px;
  cursor:pointer;
}
input{
  display:block;
  width:100%;
  padding:12px;
  margin:10px 0;
  border-radius:10px;
  border:none;
}
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;
}
.card{
  background:#1e293b;
  padding:20px;
  border-radius:15px;
}
.footer{
  text-align:center;
  padding:20px;
  background:#111827;
  margin-top:50px;
}