.attr-btn input[type="radio"] { display: none; }

.attr-btn {
  margin: .2rem;
  user-select: none;
}

.attr-btn.active {
  background-color: #0d6efd;
  color: #fff;
  border-color: #0d6efd;
}

.product-card {
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 24px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.product-header {
  border-bottom: 1px solid #eee;
  padding-bottom: 12px;
  margin-bottom: 24px;
}

.thumb-active {
  border: 2px solid var(--bs-primary);
}

.price-box span {
  font-size: 1.5rem;
  font-weight: bold;
}

.old-price {
  text-decoration: line-through;
  color: #999;
  margin-left: 8px;
}

.spec-box {
  background: #f9f9f9;
  padding: 16px;
  border-radius: 8px;
  margin-top: 32px;
}