/* Product Detail Layout */
.product-detail-section {
    padding: var(--section-spacing-mobile) 0;
    background-color: var(--color-white);
}

@media (min-width: 1024px) {
    .product-detail-section {
        padding: var(--section-spacing-desktop) 0;
    }
}

.product-detail-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .product-detail-container {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
        align-items: start;
    }
}

/* Gallery */
.product-gallery {
    background-color: var(--color-cloud-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.main-image {
    width: 100%;
    border-radius: var(--radius-md);
    aspect-ratio: 1;
    object-fit: cover;
    box-shadow: var(--shadow-soft);
}

.thumbnail-row {
    display: flex;
    gap: var(--space-2);
    overflow-x: auto;
}

.thumbnail-img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
}
.thumbnail-img:hover { border-color: var(--color-warm-apricot); }

/* Sticky Image on Desktop */
@media (min-width: 768px) {
    .product-gallery {
        position: sticky;
        top: 100px; /* Below sticky header */
    }
}

/* Product Info */
.product-info-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.product-meta h1 {
    margin-bottom: var(--space-1);
}

.product-price {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-warm-apricot);
    margin-bottom: var(--space-3);
}

/* Variant Switcher */
.variant-switcher {
    border-top: 1px solid var(--color-warm-taupe);
    padding-top: var(--space-4);
    margin-bottom: var(--space-2);
}

.variant-label {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
    display: block;
}

.variant-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.variant-btn {
    border: 1px solid var(--color-warm-taupe);
    background: transparent;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    transition: all 0.2s ease;
}

.variant-btn[aria-pressed="true"], .variant-btn.active {
    background-color: var(--color-charcoal-plum);
    color: var(--color-white);
    border-color: var(--color-charcoal-plum);
}

/* Sticky Add to Cart Mobile */
.mobile-sticky-cart {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--color-white);
    padding: var(--space-2) var(--space-3);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.05);
    z-index: 99;
    display: flex;
    gap: var(--space-2);
}

@media (min-width: 768px) {
    .mobile-sticky-cart {
        display: none;
    }
}

.quantity-selector {
    display: flex;
    border: 1px solid var(--color-warm-taupe);
    border-radius: var(--radius-sm);
}

.quantity-selector button {
    background: transparent;
    border: none;
    padding: 0 var(--space-2);
    cursor: pointer;
}

.quantity-selector input {
    width: 40px;
    text-align: center;
    border: none;
    padding: var(--space-1) 0;
}

/* Spec Table */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-4);
}

.spec-table th, .spec-table td {
    padding: var(--space-2);
    text-align: left;
    border-bottom: 1px solid rgba(201, 184, 174, 0.4);
    font-size: var(--text-sm);
}

.spec-table th {
    font-weight: 600;
    color: var(--color-charcoal-plum);
    width: 40%;
}

.spec-table td {
    color: var(--color-warm-taupe);
}

/* FAQ Accordion */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.faq-item {
    border: 1px solid var(--color-warm-taupe);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: var(--color-cloud-cream);
    border: none;
    padding: var(--space-2);
    text-align: left;
    font-weight: 600;
    font-size: var(--text-base);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: var(--text-lg);
    font-weight: 400;
    transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: var(--space-2);
    font-size: var(--text-sm);
    background: var(--color-white);
    color: var(--color-charcoal-plum);
    opacity: 0.8;
}

/* 4-icon sequence for usage */
.usage-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

@media (min-width: 600px) {
    .usage-steps {
        grid-template-columns: repeat(4, 1fr);
    }
}

.usage-step {
    text-align: center;
}

.usage-icon {
    font-size: 2rem;
    margin-bottom: var(--space-1);
    color: var(--color-warm-apricot);
}

.usage-text {
    font-size: var(--text-xs);
    font-weight: 600;
}