body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: url('images/beijing-theme-park.jpg') no-repeat center center fixed;
  background-size: cover;
}

body::after {
  content: "";
  background: url('images/growing-roses-front-cover.jpg') no-repeat center center;
  background-size: contain;
  opacity: 0.06;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  position: fixed;
  pointer-events: none;
}

.container {
  position: relative;
  z-index: 1;
  width: 90%;
  max-width: 420px;
}

.card {
  background: rgba(255,255,255,0.95);
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: 0 12px 30px rgba(0,0,0,0.45);
}

.book-img {
  width: 100%;
  max-width: 280px;
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease;
}

.book-img:hover {
  transform: scale(1.04);
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: #222;
}

.subtitle {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: #666;
}

.price {
  font-size: 1.4rem;
  font-weight: bold;
  color: #e91e63;
  margin-bottom: 1rem;
}

.shipping-note {
  margin-top: 14px;
  font-size: 0.92rem;
  color: #666;
}

.paypal-form {
  width: 100%;
}

.btn-pay {
  width: 100%;
  border: none;
  cursor: pointer;
  display: inline-block;
  background-color: #e91e63;
  color: #fff;
  font-weight: bold;
  padding: 0.95rem 1rem;
  border-radius: 0.6rem;
  text-decoration: none;
  transition: all 0.25s ease;
  font-size: 1rem;
}

.btn-pay:hover {
  background-color: #d81b60;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

@media (max-width: 576px) {
  h1 {
    font-size: 1.6rem;
  }
}

@media (max-width: 576px) {
  .price {
    font-size: 1.2rem;
  }
}

@media (max-width: 576px) {
  .card {
    padding: 1.5rem;
  }
}