body {
  margin: 0;
  height: 100vh;
  background: radial-gradient(circle at top, #0f1c2e, #050c17);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-family: 'Poppins', sans-serif;
}

.payment-box {
  background: #0f1c2e;
  padding: 25px;
  border-radius: 20px;
  width: 350px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

.highlight {
  color: #4da3ff;
}

.subtitle {
  color: #ccc;
  font-size: 14px;
  margin-bottom: 15px;
}

input {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: none;
  border-radius: 10px;
  background: #1a2a40;
  color: #fff;
  text-align: center;
  font-size: 15px;
}

input:focus {
  outline: 2px solid #4da3ff;
}

.reason-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.reason-buttons button {
  flex: 48%;
  margin-top: 8px;
  padding: 10px;
  border: none;
  border-radius: 10px;
  background: #1a2a40;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
}

.reason-buttons button.active,
.reason-buttons button:hover {
  background: #4da3ff;
  color: #fff;
}

.pay-btn {
  background: #007bff;
  border: none;
  padding: 12px;
  margin-top: 12px;
  border-radius: 10px;
  color: white;
  width: 100%;
  font-size: 16px;
  cursor: pointer;
}

.upi-buttons a {
  display: block;
  background: #1a2a40;
  margin: 6px 0;
  padding: 10px;
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
  transition: 0.3s;
}

.upi-buttons a:hover {
  background: #4da3ff;
}

.whatsapp-btn {
  display: block;
  background: #25D366;
  color: #fff;
  text-decoration: none;
  padding: 10px;
  margin-top: 10px;
  border-radius: 10px;
  font-weight: bold;
}