body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  text-align: center;
}

header {
  background-color: #f4c300;
  padding: 20px;
}

header h1 {
  margin: 0;
  font-size: 2em;
}

#sub-header {
  font-size: 1.1em;
  color: #333;
  margin-top: 8px;
}

.card {
  max-width: 500px;
  margin: 40px auto;
  background-color: #ef4444;
  padding: 20px;
  border-radius: 12px;
  color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border: 1px solid #000;
}

input[type="text"] {
  width: 80%;
  padding: 10px;
  margin-top: 10px;
  border-radius: 8px;
  border: 2px solid #ccc;
  font-size: 1em;
}

button {
  margin-top: 15px;
  padding: 10px 20px;
  font-size: 1em;
  border-radius: 8px;
  border: 2px solid #000;
  background-color: white;
  color: black;
  cursor: pointer;
}

button:hover {
  background-color: #f0f0f0;
}

.feedback {
  margin-top: 10px;
  font-weight: bold;
}