* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.app-container {
  width: 100%;
  max-width: 420px;
  background-color: #fff;
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Top Header */
.top-box {
  background: linear-gradient(to right, #580e8f, #9200ff);
  color: #fff;
  padding: 24px 30px 40px;
  position: relative;
  overflow: hidden;
}

.top-box::before {
  content: "";
  position: absolute;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -80px;
  right: -80px;
}

.top-box::after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  bottom: -60px;
  left: -60px;
}

.top-box p {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 18px;
  font-weight: 600;
  position: relative;
  z-index: 1;
}

.left-icon,
.right-icon {
  font-size: 22px;
  cursor: pointer;
  transition: transform 0.3s;
}

.left-icon:hover {
  transform: translateX(-5px);
}

.right-icon:hover {
  transform: scale(1.1);
}

/* Payment Amount Display */
.middle-box {
  background: #fff;
  margin: -35px 30px 25px;
  padding: 25px;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  position: relative;
  z-index: 2;
}

.middle-box h1 {
  color: #2d2d2d;
  font-size: 52px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.middle-box h1 span {
  font-size: 28px;
  font-weight: 600;
  margin-top: 10px;
  margin-left: 5px;
  color: #9200ff;
}

.middle-box p {
  color: #777;
  font-size: 15px;
  font-weight: 500;
}

.payment-company {
  display: inline-flex;
  align-items: center;
  margin-top: 5px;
  background: #f8f9fa;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 14px;
}

.payment-company i {
  color: #9200ff;
  margin-right: 8px;
}

/* Payment Options */
.bottom-box {
  padding: 0 30px 25px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.payment-option-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px;
  border-radius: 14px;
  border: 2px solid #eef0f3;
  background: #fff;
  color: #333;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
}

.payment-option-btn:hover {
  border-color: #9200ff;
  background: #f9f4ff;
  transform: translateY(-3px);
  box-shadow: 0 8px 15px rgba(146, 0, 255, 0.1);
}

.payment-option-btn i {
  font-size: 20px;
  color: #9200ff;
}

/* Card Details */
.card-details {
  background: #f8f9fa;
  margin: 0 30px 30px;
  padding: 25px;
  border-radius: 20px;
}

.card-details > p {
  /* font-size: 16px; */
  font-weight: 600;
  color: #444;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-details > p i {
  color: #9200ff;
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #555;
  margin-bottom: 8px;
}

.input-group input {
  width: 100%;
  padding: 16px 18px;
  border: 2px solid #e1e5eb;
  border-radius: 12px;
  font-size: 16px;
  font-family: "Poppins", sans-serif;
  transition: all 0.3s;
  background: #fff;
}

.input-group input:focus {
  outline: none;
  border-color: #9200ff;
  box-shadow: 0 0 0 3px rgba(146, 0, 255, 0.1);
}

.input-row {
  display: flex;
  gap: 15px;
}

.input-row .input-group {
  flex: 1;
}

.pay-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(to right, #580e8f, #9200ff);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 6px 20px rgba(146, 0, 255, 0.3);
}

.pay-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(146, 0, 255, 0.4);
}

.pay-btn:active {
  transform: translateY(0);
}

.pay-btn i {
  font-size: 20px;
}

/* Payment Methods Footer */
.payment-methods {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 20px 30px;
  border-top: 1px solid #eee;
}

.payment-methods i {
  font-size: 28px;
  color: #aaa;
  transition: color 0.3s;
  cursor: pointer;
}

.payment-methods i:hover {
  color: #9200ff;
}

/* Security Badge */
.security-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px;
  background: #f0f7ff;
  border-radius: 12px;
  margin-top: 20px;
  font-size: 14px;
  color: #2d6ae3;
}

.security-badge i {
  font-size: 18px;
}

/* Responsive Design */
@media (max-width: 480px) {
  .app-container {
    max-width: 100%;
    margin: 10px;
  }

  .middle-box h1 {
    font-size: 46px;
  }

  .top-box,
  .bottom-box,
  .card-details {
    padding-left: 25px;
    padding-right: 25px;
  }

  .input-row {
    flex-direction: column;
    gap: 0;
  }
}

/* Animation for input focus */
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(146, 0, 255, 0.2);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(146, 0, 255, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(146, 0, 255, 0);
  }
}

.input-group input:focus {
  animation: pulse 1.5s infinite;
}