/* Custom Variables */
:root {
  --blue-brand: #2563eb;
  --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* Header Image 3D Tilt - Chỉ dành cho Header */
.header-img-container {
  perspective: 1200px;
}

.header-tilt-card {
  transition: var(--transition-smooth);
  transform-style: preserve-3d;
  will-change: transform;
}

.header-tilt-card:hover {
  /* Nghiêng nhẹ nhàng cực sang */
  transform: rotateX(5deg) rotateY(-5deg) scale(1.02);
  box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.15);
}

/* Product Card - Hiệu ứng Floating (Không nghiêng) */
.product-card {
  background: white;
  border-radius: 24px;
  padding: 16px;
  border: 1px solid #f1f5f9;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.product-card:hover {
  transform: translateY(-10px); /* Bay lên */
  border-color: var(--blue-brand);
  box-shadow: 0 25px 50px -12px rgba(37, 99, 235, 0.15); /* Đổ bóng xanh nhẹ */
}

.product-card img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: 20px;
  transition: var(--transition-smooth);
}

/* Khi hover card thì ảnh hơi co lại hoặc phóng to nhẹ tùy gu, ở đây tôi cho phóng nhẹ */
.product-card:hover img {
  transform: scale(1.03);
}

.product-card h3 {
  font-weight: 800;
  margin: 15px 0 8px 0;
  color: #1e293b;
  font-size: 1.1rem;
}

.product-card .price {
  font-weight: 900;
  color: var(--blue-brand);
  font-size: 1.2rem;
  margin-top: auto;
}

.product-card:hover::after {
  opacity: 1;
  transform: translateY(5px);
}
.header-img-container {
  perspective: 2000px;
}

.header-tilt-card {
  transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1), box-shadow 0.6s ease;
  transform-style: preserve-3d;
}
.header-img-container:hover .header-tilt-card {
  transform: rotateX(8deg) rotateY(-12deg) scale(1.02);
  box-shadow: 0 60px 100px -30px rgba(0, 0, 0, 0.2);
}
#mobile-menu:not(.hidden) {
    display: flex !important;
    animation: slideDown 0.3s ease-out forwards;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
.header-tilt-card::after {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 50%; height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.3), transparent);
  transition: 0.8s;
}
.header-img-container:hover .header-tilt-card::after {
  left: 150%;
}