:root {
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --accent-glow: rgba(0, 242, 254, 0.15);
}

.product-page-premium { padding: 60px 0 100px; background: radial-gradient(circle at 50% 0%, var(--accent-glow) 0%, transparent 50%); }

.back-navigation { padding: 20px 0; }
.btn-back-ultra {
    display: inline-flex; align-items: center; gap: 10px;
    color: var(--text-muted); font-weight: 600; text-decoration: none;
    transition: 0.3s; padding: 10px 20px; border-radius: 12px;
    background: var(--glass-bg); border: 1px solid var(--glass-border);
}
.btn-back-ultra:hover { color: var(--accent-1); border-color: var(--accent-1); transform: translateX(-5px); }

.product-main-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: start;
    margin-bottom: 100px;
}

/* Visuals */
.product-visuals { position: sticky; top: 100px; }
.main-image-container {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 40px;
    padding: 80px;
    display: flex;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0,0,0,0.3);
}
.zoom-hint {
    position: absolute; bottom: 20px; right: 20px;
    font-size: 0.75rem; color: var(--text-muted);
    background: rgba(0,0,0,0.5); padding: 5px 12px; border-radius: 20px;
}
.glow-effect {
    position: absolute; width: 100%; height: 100%;
    background: radial-gradient(circle, var(--accent-1) 0%, transparent 70%);
    opacity: 0.05; top: 0; left: 0;
}
.main-image-container img {
    max-width: 100%; max-height: 450px;
    filter: drop-shadow(0 20px 50px rgba(0,0,0,0.4));
    transition: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.main-image-container:hover img { transform: scale(1.1) rotate(2deg); }

/* Gallery Thumbnails */
.product-gallery-thumbnails {
    display: flex; gap: 15px; margin-top: 20px; overflow-x: auto; padding-bottom: 10px;
}
.thumb-item {
    width: 80px; height: 80px; border-radius: 12px; overflow: hidden;
    border: 2px solid var(--glass-border); cursor: pointer; transition: 0.3s;
    flex-shrink: 0; background: var(--bg-surface);
}
.thumb-item img { width: 100%; height: 100%; object-fit: contain; padding: 5px; }
.thumb-item:hover { border-color: var(--accent-1); transform: translateY(-3px); }
.thumb-item.active { border-color: var(--accent-1); box-shadow: 0 0 15px var(--accent-1); }

.image-badges { display: flex; gap: 12px; margin-top: 25px; flex-wrap: wrap; }
.badge-tech {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    padding: 10px 18px; border-radius: 50px; font-size: 0.8rem;
    color: var(--text-muted); display: flex; align-items: center; gap: 10px;
    backdrop-filter: blur(10px);
}
.badge-tech i { color: var(--accent-1); }

/* Info Panel */
.breadcrumb-premium { display: flex; align-items: center; gap: 12px; margin-bottom: 25px; }
.breadcrumb-premium a { color: var(--text-muted); text-decoration: none; font-weight: 500; transition: 0.3s; }
.breadcrumb-premium a:hover { color: var(--accent-1); }
.category-name { color: var(--accent-1); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; font-size: 0.8rem; }

.product-title-ultra { font-size: 4rem; line-height: 1; margin-bottom: 25px; font-weight: 900; color: var(--text-pure); }

.rating-summary { display: flex; align-items: center; gap: 15px; margin-bottom: 35px; }
.review-count { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }

.price-display-ultra { margin-bottom: 45px; display: flex; align-items: center; gap: 30px; }
.current-price { display: flex; align-items: flex-start; gap: 8px; }
.currency { font-size: 1.8rem; font-weight: 800; color: var(--accent-1); margin-top: 8px; }
.amount { font-size: 4.5rem; font-weight: 900; line-height: 1; color: var(--text-pure); letter-spacing: -2px; }

.stock-status { 
    display: inline-flex; align-items: center; gap: 10px; 
    background: var(--glass-bg); padding: 10px 20px; border-radius: 50px; 
    font-size: 0.9rem; font-weight: 600; border: 1px solid var(--glass-border);
}
.status-dot { width: 10px; height: 10px; border-radius: 50%; position: relative; }
.in-stock .status-dot { background: #00ffcc; box-shadow: 0 0 15px #00ffcc; }
.in-stock .status-dot::after {
    content: ''; position: absolute; width: 100%; height: 100%; background: inherit;
    border-radius: 50%; animation: pulse 2s infinite; opacity: 0.5;
}
@keyframes pulse { 0% { transform: scale(1); opacity: 0.5; } 100% { transform: scale(3); opacity: 0; } }

.product-description-premium { font-size: 1.15rem; line-height: 1.8; color: var(--text-muted); margin-bottom: 45px; max-width: 90%; }

/* Buy Actions */
.buy-actions-premium { display: flex; gap: 20px; margin-bottom: 50px; }
.quantity-selector-premium {
    display: flex; align-items: center;
    background: var(--bg-surface); border: 1px solid var(--glass-border);
    border-radius: 15px; padding: 5px;
}
.qty-btn { 
    width: 50px; height: 50px; border: none; background: transparent; 
    color: white; cursor: pointer; border-radius: 12px; transition: 0.3s;
    display: flex; align-items: center; justify-content: center;
}
.qty-btn:hover { background: var(--glass-bg); color: var(--accent-1); }
#detail-qty { 
    width: 60px; text-align: center; border: none; background: transparent; 
    color: white; font-size: 1.4rem; font-weight: 800; 
}

.btn-main-buy {
    flex-grow: 1;
    background: var(--gradient-primary); border: none;
    color: var(--bg-base); font-weight: 800; font-size: 1.1rem;
    letter-spacing: 1px; border-radius: 15px; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 12px;
    transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 15px 35px rgba(0, 242, 254, 0.25);
}
.btn-main-buy:hover { transform: translateY(-5px) scale(1.02); box-shadow: 0 20px 50px rgba(0, 242, 254, 0.4); }

.wishlist-btn-detail {
    width: 65px; height: 65px; border-radius: 15px;
    border: 1px solid var(--glass-border); background: var(--glass-bg);
    color: var(--text-muted); cursor: pointer; transition: 0.3s; font-size: 1.4rem;
}
.wishlist-btn-detail:hover { border-color: #ff4757; color: #ff4757; background: rgba(255, 71, 87, 0.05); }
.wishlist-btn-detail.active { background: #ff4757; color: white; border-color: #ff4757; box-shadow: 0 10px 20px rgba(255, 71, 87, 0.3); }

.trust-cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; border-top: 1px solid var(--glass-border); pt: 40px; }
.trust-card-mini { display: flex; align-items: center; gap: 15px; }
.t-icon { 
    width: 45px; height: 45px; background: var(--glass-bg); border-radius: 12px;
    display: flex; align-items: center; justify-content: center; color: var(--accent-1); font-size: 1.2rem;
}
.t-text { display: flex; flex-direction: column; }
.t-text strong { font-size: 0.85rem; color: var(--text-pure); }
.t-text span { font-size: 0.75rem; color: var(--text-muted); }

/* Specs Section */
.specs-section { margin-top: 120px; }
.section-title-premium { font-size: 2.2rem; margin-bottom: 50px; font-weight: 800; color: var(--text-pure); position: relative; display: inline-block; }
.section-title-premium::after { content: ''; position: absolute; bottom: -10px; left: 0; width: 60px; height: 4px; background: var(--accent-1); border-radius: 2px; }

.specs-glass-table {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: 30px; padding: 50px;
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px 80px;
    backdrop-filter: blur(15px);
}
.spec-entry { display: flex; justify-content: space-between; align-items: center; padding-bottom: 15px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.spec-label { color: var(--text-muted); font-weight: 600; display: flex; align-items: center; gap: 12px; font-size: 0.95rem; }
.spec-label i { color: var(--accent-1); width: 20px; }
.spec-value { color: var(--text-pure); font-weight: 700; font-size: 1rem; }

/* Reviews Section */
.reviews-section { margin-top: 120px; }
.reviews-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 50px; }
.btn-review-trigger {
    background: transparent; border: 1px solid var(--accent-1); color: var(--accent-1);
    padding: 12px 30px; border-radius: 50px; font-weight: 700; cursor: pointer; transition: 0.3s;
    text-decoration: none; display: flex; align-items: center; gap: 10px;
}
.btn-review-trigger:hover { background: var(--accent-1); color: var(--bg-base); box-shadow: 0 10px 20px rgba(0, 242, 254, 0.2); }

.review-form-glass {
    background: var(--bg-surface); border: 1px solid var(--accent-1);
    padding: 40px; border-radius: 25px; margin-bottom: 60px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4); animation: slideDown 0.5s ease;
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

.review-form-glass h4 { font-size: 1.5rem; margin-bottom: 25px; }
.star-rating-input { display: flex; gap: 10px; margin-bottom: 25px; font-size: 1.8rem; color: #ffbc00; }
.star-rating-input i { cursor: pointer; transition: 0.2s; }
.star-rating-input i:hover { transform: scale(1.2); }
.review-form-glass textarea {
    width: 100%; height: 150px; background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border);
    border-radius: 15px; padding: 20px; color: white; font-family: inherit; font-size: 1rem;
    margin-bottom: 25px; resize: none; outline: none; transition: 0.3s;
}
.review-form-glass textarea:focus { border-color: var(--accent-1); background: rgba(0,0,0,0.3); }
.form-actions { display: flex; gap: 20px; align-items: center; }
.btn-cancel { background: transparent; border: none; color: var(--text-muted); cursor: pointer; font-weight: 600; }
.btn-cancel:hover { color: white; }

.reviews-grid-premium { display: grid; grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); gap: 30px; }
.review-card-premium {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    padding: 35px; border-radius: 25px; transition: 0.3s;
    backdrop-filter: blur(10px);
}
.review-card-premium:hover { border-color: var(--accent-1); transform: translateY(-5px); background: rgba(255,255,255,0.05); }
.rev-header { display: flex; justify-content: space-between; margin-bottom: 25px; }
.rev-user { display: flex; align-items: center; gap: 15px; }
.rev-avatar { 
    width: 45px; height: 45px; background: var(--gradient-primary); border-radius: 50%; 
    color: var(--bg-base); display: flex; align-items: center; justify-content: center; 
    font-weight: 900; font-size: 1.2rem;
}
.rev-user-info { display: flex; flex-direction: column; }
.rev-user-info strong { font-size: 1.1rem; color: var(--text-pure); }
.rev-status { font-size: 0.7rem; color: #00ffcc; font-weight: 700; text-transform: uppercase; }
.rev-stars { color: #ffbc00; font-size: 0.9rem; }
.rev-text { color: var(--text-muted); line-height: 1.7; margin-bottom: 25px; font-size: 1rem; }
.rev-footer { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,0.05); pt: 20px; }
.rev-date { font-size: 0.8rem; color: #666; display: flex; align-items: center; gap: 8px; }
.rev-helpful { font-size: 0.8rem; color: var(--accent-1); cursor: pointer; font-weight: 600; }

.empty-state-reviews { text-align: center; grid-column: 1/-1; padding: 100px; color: var(--text-muted); background: var(--glass-bg); border-radius: 30px; border: 1px dashed var(--glass-border); }
.empty-icon { font-size: 4rem; margin-bottom: 20px; opacity: 0.3; color: var(--accent-1); }
.empty-state-reviews p { font-size: 1.4rem; font-weight: 700; color: var(--text-pure); margin-bottom: 10px; }

/* Related Section */
.related-section { margin-top: 120px; }
.product-grid-premium { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }

.view-details-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-pure);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    margin-top: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.view-details-link:hover {
    background: var(--accent-1);
    color: var(--bg-base);
    border-color: var(--accent-1);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 242, 254, 0.2);
}

.view-details-link i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.view-details-link:hover i {
    transform: translateX(5px);
}

/* Responsive Improvements */
@media (max-width: 1200px) {
    .product-title-ultra { font-size: 3rem; }
    .amount { font-size: 3.5rem; }
    .product-grid-premium { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .product-main-grid { grid-template-columns: 1fr; gap: 40px; }
    .product-visuals { position: relative; top: 0; }
    .main-image-container { padding: 30px; height: 400px; }
    .trust-cards-grid { grid-template-columns: 1fr; }
    .specs-glass-table { grid-template-columns: 1fr; padding: 25px; }
    .reviews-grid-premium { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .product-title-ultra { font-size: 1.8rem !important; margin-bottom: 10px; }
    .amount { font-size: 2.2rem !important; }
    .main-image-container { height: 300px; }
    .product-grid-premium { grid-template-columns: 1fr !important; gap: 20px; }
    .buy-actions-premium { 
        flex-direction: column !important; 
        gap: 15px !important;
        width: 100%;
    }
    .quantity-selector-premium { 
        width: 100% !important; 
        justify-content: center !important; 
        padding: 15px !important;
    }
    .btn-main-buy { 
        width: 100% !important; 
        height: 60px !important;
        justify-content: center !important;
    }
    .wishlist-btn-detail { width: 100% !important; justify-content: center !important; }
}

@media (max-width: 480px) {
    .main-image-container { height: 250px; }
    .product-title-ultra { font-size: 1.6rem !important; }
    .amount { font-size: 2rem !important; }
}