body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
}

header {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 20px;
}

.container {
  width: 90%;
  max-width: 600px;
  margin: 40px auto;
  text-align: center;
}

input {
  padding: 10px;
  width: 70%;
  margin-right: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  padding: 10px 15px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #218838;
}

.card {
  margin-top: 20px;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}