/* ================= HEADER (detail pages) ================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 14px 40px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 15px;
  border-bottom: 1px solid var(--border);
}

.nav-links{
  display: flex;
  gap: 24px;
}

.nav-links a{
  position: relative;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover{
  color: var(--primary);
}

.logo{
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img{
  height: 54px;
  max-width: 180px;
  object-fit: contain;
}

.header-right{
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--text);
}

.cart{
  position: relative;
  font-size: 19px;
  transition: transform 0.2s ease;
}

.cart:hover{ transform: translateY(-2px) scale(1.05); }

.cart-count{
  position: absolute;
  top: -8px;
  right: -10px;
  background: var(--gradient);
  color: #fff;
  font-size: 11px;
  font-weight: bold;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ================= BREADCRUMB ================= */
.breadcrumb{
  font-size: 13px;
  color: var(--text-muted);
  margin: 20px 40px 15px;
  animation: fadeUp 0.4s ease both;
}

.breadcrumb a{
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover{
  color: var(--primary);
  text-decoration: underline;
}

/* ================= PRODUCT BOX ================= */
.product-box{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 44px;
  margin: 0 40px 50px;
  display: flex;
  gap: 54px;
  flex-wrap: wrap;
  animation: fadeUp 0.5s ease both;
}

.product-image{
  position: relative;
  flex: 1;
  min-width: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border-radius: var(--radius-md);
  padding: 30px;
}

.product-image img{
  max-width: 100%;
  max-height: 320px;
  transition: transform 0.4s ease;
}

.product-image:hover img{
  transform: scale(1.05);
}

.zoom-icon{
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 16px;
  color: var(--text);
  background: var(--surface);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.product-info{
  flex: 1;
  min-width: 280px;
}

.product-info h1{
  font-family: var(--font-display);
  font-style: italic;
  font-size: 26px;
  color: var(--text);
  margin: 0 0 15px;
  line-height: 1.3;
}

.price{
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
  text-decoration: none;
}

.in-stock{
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--success-bg);
  color: var(--success-text);
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 22px;
}

.desc{
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

.specs{
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.9;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.specs li b{
  color: var(--text-muted);
  font-weight: 600;
}

.buy-row{
  display: flex;
  gap: 12px;
}

.buy-row input{
  width: 64px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
}

.buy-row button{
  background: var(--gradient);
  background-size: 160% auto;
  background-position: left center;
  color: #fff;
  border: none;
  padding: 14px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-position 0.4s ease, transform 0.15s ease, box-shadow 0.25s ease;
}

.buy-row button:hover{
  background-position: right center;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(200, 29, 69, 0.3);
}

.buy-row button:active{
  transform: translateY(0) scale(0.97);
}

@media (max-width: 600px){
  .product-box{ margin: 0 16px 40px; padding: 26px; }
  .breadcrumb{ margin: 16px 16px 12px; }
  .site-header{ padding: 14px 18px; }
}