body{
  margin:0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg,#e8f5e9,#ffffff,#c8e6c9);
  display:flex;
  justify-content:center;
  align-items:center;
  height:100vh;
}

.card{
  background:white;
  padding:30px;
  border-radius:20px;
  box-shadow:0 10px 25px rgba(0,0,0,0.1);
  text-align:center;
  width:320px;
}

h1{
  color:#2e7d32;
}

p{
  color:#555;
  font-size:18px;
}

nav a{
  display:inline-block;
  margin:5px;
  padding:10px 15px;
  background:#2e7d32;
  color:white;
  border-radius:10px;
  text-decoration:none;
}

button{
  margin-top:10px;
  padding:10px 15px;
  border:none;
  border-radius:10px;
  background:#333;
  color:white;
  cursor:pointer;
}