/* ========================================
   Product Detail Page Styles
   ======================================== */

/* Product Hero */
.product-hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
    background: var(--canvas);
}
.product-hero-glow {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 70% 60% at 70% 40%, rgba(20,90,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}
.product-hero .container { position: relative; z-index: 1; }

.back-link {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 14px; font-weight: 500; color: var(--signal);
    margin-bottom: 40px;
    transition: gap 0.2s ease;
}
.back-link:hover { gap: 10px; }

.product-hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.product-hero-left .section-tag { display: inline-block; margin-bottom: 16px; }
.product-hero-left h1 {
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1.05;
    letter-spacing: -1.51px;
    margin-bottom: 20px;
}
.product-hero-left > p {
    font-size: 18px;
    color: var(--fog);
    line-height: 1.5;
    margin-bottom: 32px;
    max-width: 520px;
}

.product-hero-meta { margin-bottom: 36px; }
.meta-item {
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; color: var(--slate);
    margin-bottom: 10px;
}
.meta-item i { color: var(--signal); font-size: 16px; width: 20px; text-align: center; }

.product-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.product-hero-visual {
    width: 100%;
    aspect-ratio: 1;
    max-width: 380px;
    margin: 0 auto;
    border-radius: var(--r-big);
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-block);
    position: relative;
    overflow: hidden;
}
.product-hero-visual::after {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 50% 40%, rgba(255,255,255,0.15) 0%, transparent 60%);
}
.product-hero-visual i {
    font-size: 100px;
    color: rgba(255,255,255,0.9);
    position: relative; z-index: 1;
}

/* Features */
.pd-features { padding: 80px 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--white);
    border-radius: var(--r-big);
    padding: 36px 28px;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}
.feature-card:hover { box-shadow: var(--shadow-block); transform: translateY(-4px); }
.feature-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: var(--tint); display: flex; align-items: center; justify-content: center;
    color: var(--signal); font-size: 20px;
    margin-bottom: 20px;
}
.feature-card h4 { font-size: 18px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--fog); line-height: 1.5; }

/* Gallery */
.pd-gallery { padding: 80px 0; }
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.gallery-item {
    aspect-ratio: 16/10;
    border-radius: var(--r-card);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 12px;
    color: rgba(255,255,255,0.85);
    font-size: 14px;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
    cursor: pointer;
}
.gallery-item:hover { transform: scale(1.02); box-shadow: var(--shadow-block); }
.gallery-item i { font-size: 32px; }

/* Requirements */
.pd-requirements { padding: 80px 0; }
.req-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.req-card {
    background: var(--white);
    border-radius: var(--r-big);
    padding: 32px 28px;
    box-shadow: var(--shadow-card);
}
.req-card h5 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--action);
    display: flex; align-items: center; gap: 8px;
}
.req-card h5::before {
    content: '';
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--signal);
}
.req-card ul { list-style: none; }
.req-card li {
    font-size: 14px;
    color: var(--slate);
    padding: 8px 0;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}
.req-card li:last-child { border-bottom: none; }

/* Related */
.pd-related { padding: 80px 0; }

/* Responsive */
@media (max-width: 1024px) {
    .product-hero-content { grid-template-columns: 1fr; gap: 40px; }
    .product-hero-visual { max-width: 300px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: 1fr; }
    .req-grid { grid-template-columns: 1fr; }
    .product-hero-actions { flex-direction: column; align-items: flex-start; }
}