/* Global Styles */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #1a1a1a, #000);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Payment Container */
.payment-container {
  width: 90%;
  max-width: 350px;
  padding: 20px;
  background: rgba(20, 20, 20, 0.95);
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(255, 0, 0, 0.4);
  text-align: center;
}

/* Headings and Text */
h1 {
  color: #f40808;
  margin-bottom: 10px;
  font-size: 2rem;
}

p {
  font-size: 0.95rem;
  color: #ddd;
  margin-bottom: 20px;
}

/* QR Code */
.qr-code {
  width: 80%;
  aspect-ratio: 35.6 / 53.98; /* ID card proportion */
  object-fit: cover;
  border: 1px solid #400489;
  border-radius: 10px;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}

.qr-code:hover {
  transform: scale(1.03);
}

/* UPI Section */
.upi-section {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

#upi-id {
  background: #2a2a2a;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  color: #fff;
  word-break: break-all;
  text-align: center;
}

#copy-btn {
  padding: 8px 15px;
  background: #f40202;
  border: none;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
}

#copy-btn:hover {
  background: #590808;
  transform: scale(1.05);
}

/* Copy Popup */
.copy-popup {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #930303;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.95rem;
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
  opacity: 0;
  transition: all 0.5s ease;
  z-index: 999;
}

.copy-popup.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Back Button */
.back-btn {
  display: inline-block;
  padding: 10px 20px;
  background: transparent;
  border: 2px solid #e60808;
  border-radius: 6px;
  color: #e61111;
  text-decoration: none;
  transition: 0.3s;
}

.back-btn:hover {
  background: #570606;
  color: #fff;
  border: none;
}

/* Responsive Styles */

/* Small Phones */
@media (max-width: 480px) {
  .payment-container {
    width: 75%;
    max-width: 220px;
    padding: 12px;
    border-radius: 10px;
  }

  h1 {
    font-size: 1.4rem;
  }

  p {
    font-size: 0.85rem;
  }

  .qr-code {
    width: 90%;
    aspect-ratio: 3/4;
  }

  .upi-section {
    flex-direction: column;
    gap: 6px;
  }

  #upi-id {
    font-size: 0.85rem;
    padding: 6px 10px;
  }

  #copy-btn, .back-btn {
    font-size: 0.85rem;
    padding: 6px 12px;
    width: 100%;
  }

  .back-btn {
    width: 80%;
    margin-top: 10px;
  }
}

/* Very Small Phones */
@media (max-width: 360px) {
  h1 {
    font-size: 1.2rem;
  }

  .qr-code {
    width: 100%;
  }

  #upi-id {
    font-size: 0.8rem;
  }

  #copy-btn, .back-btn {
    font-size: 0.8rem;
    padding: 5px 10px;
  }
}

/* Large Monitors */
@media (min-width: 1600px) {
  .payment-container {
    max-width: 300px;
    padding: 15px;
  }

  h1 {
    font-size: 1.8rem;
  }

  p {
    font-size: 0.9rem;
  }

  .qr-code {
    width: 70%;
  }

  #upi-id {
    font-size: 0.85rem;
  }

  #copy-btn, .back-btn {
    font-size: 0.85rem;
    padding: 7px 14px;
  }
}

/* Extra-Large Monitors (Ultra-wide) */
@media (min-width: 2000px) {
  .payment-container {
    max-width: 280px;
    padding: 12px;
  }

  h1 {
    font-size: 1.7rem;
  }

  p {
    font-size: 0.85rem;
  }

  .qr-code {
    width: 65%;
  }

  #upi-id {
    font-size: 0.8rem;
  }

  #copy-btn, .back-btn {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
}