/* General styling */
body {
  font-family: 'Courier New', Courier, monospace;
  text-align: center;
  margin-top: 50px;
  background-color: #f8f9fa;
  background-image: url('https://www.transparenttextures.com/patterns/giftly.png');
  color: #2c3e50;
}

h1 {
  font-size: 2.5em;
  color: #e74c3c;
  text-shadow: 2px 2px #d35400;
}

p {
  font-size: 1.2em;
  margin-bottom: 20px;
}

input {
  padding: 10px;
  font-size: 16px;
  width: 200px;
  border: 2px solid #27ae60;
  border-radius: 5px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin-left: 10px;
  cursor: pointer;
  background-color: #27ae60;
  color: #fff;
  border: none;
  border-radius: 5px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #2ecc71;
}

.result {
  margin-top: 20px;
  font-size: 1.5em;
  font-weight: bold;
  color: #16a085;
}

.error {
  color: #e74c3c;
}

footer {
  margin-top: 30px;
  font-size: 0.9em;
  color: #7f8c8d;
}

footer a {
  color: #3498db;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Festive decorations */
body::before {
  content: '🎄';
  font-size: 5em;
  position: absolute;
  top: 10px;
  left: 10px;
}

body::after {
  content: '🎁';
  font-size: 5em;
  position: absolute;
  top: 10px;
  right: 10px;
}