body {
  font-family: Arial, sans-serif;
  background: #f0f4fa;
  color: #333;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: auto;
  text-align: center;
}

header img {
  width: 160px;
  border-radius: 50%;
  margin-bottom: 10px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: white;
  padding: 15px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.card button {
  padding: 8px 12px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.price {
  font-weight: bold;
  color: #e74c3c;
  margin: 10px 0;
}

.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal-box {
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  width: 300px;
  text-align: center;
}

.modal-box img.qr {
  width: 180px;
  margin: 15px 0;
}

.modal-box button {
  margin-top: 10px;
  padding: 8px 14px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.modal-box button:last-child {
  background: #dc3545;
}
footer {
  text-align: center;
  padding: 15px;
  margin-top: 40px;
  font-size: 14px;
  background-color: #f8f8f8;
  color: #555;
  border-top: 1px solid #ddd;
}