/* ============================================================
   PRODUCT DETAIL PAGE
   ============================================================ */

:root {
    --product-bg:        #FFFFFF;
    --product-off-white:   #F9F9FB;
    --product-yellow:      #FFD700;
    --product-charcoal:    #111111;
    --product-muted:       #555555;
    --product-border:      #E5E5E5;
    --product-radius-lg:   24px;
    --product-radius-sm:   8px;
    --product-safe-x:      40px;
}

@media (max-width: 1023px) {
    :root {
        --product-safe-x: 20px;
    }
}

.product-page {
    background: var(--product-bg);
    color: var(--product-charcoal);
    min-height: 100vh;
}

.product-page .navbar {
    position: sticky;
    top: 0;
    z-index: 100;
}

/* ── Layout ─────────────────────────────────────────────── */
.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: start;
    padding: 0 var(--product-safe-x);
    max-width: 1440px;
    margin: 0 auto;
    gap: 48px;
}

.product-media-col {
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 32px 0 48px;
}

.product-media-frame {
    width: 100%;
    border-radius: var(--product-radius-lg);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
    background: var(--product-off-white);
    line-height: 0;
}

#dynamic-product-image {
    width: 100%;
    height: auto;
    display: block;
    vertical-align: middle;
}

.product-details-col {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 32px 0 80px;
    max-width: 560px;
}

/* ── Meta stack ─────────────────────────────────────────── */
.product-breadcrumbs {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--product-muted);
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.product-breadcrumbs a {
    color: var(--product-muted);
    transition: color 0.2s ease;
}

.product-breadcrumbs a:hover {
    color: var(--product-charcoal);
}

.product-breadcrumbs span {
    color: var(--product-charcoal);
}

#dynamic-product-title {
    font-size: clamp(1.75rem, 4vw, 3.5rem);
    font-weight: 800;
    font-style: italic;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--product-charcoal);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

#dynamic-product-price {
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--product-charcoal);
}

#dynamic-product-description {
    font-size: 1rem;
    line-height: 1.65;
    color: var(--product-muted);
}

/* ── Size selector ──────────────────────────────────────── */
.product-size-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.product-size-label {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--product-charcoal);
}

.product-size-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.product-size-btn {
    width: 48px;
    height: 48px;
    border: 1px solid var(--product-border);
    background: var(--product-bg);
    border-radius: var(--product-radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--product-charcoal);
    transition: all 0.2s ease;
}

.product-size-btn:hover {
    border-color: var(--product-charcoal);
}

.product-size-btn.active {
    background: var(--product-charcoal);
    color: var(--product-bg);
    border-color: var(--product-charcoal);
}

/* ── CTA ────────────────────────────────────────────────── */
.product-add-btn {
    width: 100%;
    height: 56px;
    border-radius: var(--product-radius-sm);
    background: var(--product-yellow);
    color: var(--product-charcoal);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    transition: opacity 0.2s ease, transform 0.15s ease;
}

.product-add-btn:hover {
    opacity: 0.9;
}

.product-add-btn:active {
    transform: scale(0.995);
}

.product-designer-link {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--product-charcoal);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.product-designer-link:hover {
    opacity: 0.7;
}

/* ── Spec accordion ─────────────────────────────────────── */
.product-accordion {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--product-border);
}

.product-accordion-item {
    border-bottom: 1px solid var(--product-border);
}

.product-accordion-item.is-open .product-accordion-icon {
    transform: rotate(180deg);
}

.product-accordion-item.is-open .product-accordion-icon-v {
    opacity: 0;
}

.product-accordion-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 0;
    background: none;
    text-align: left;
    color: var(--product-charcoal);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.product-accordion:hover .product-accordion-item:not(:hover) {
    opacity: 0.5;
}

.product-accordion-item:hover .product-accordion-trigger {
    transform: translateX(6px);
}

.product-accordion-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--product-charcoal);
}

.product-accordion-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    position: relative;
    transition: transform 0.3s ease;
}

.product-accordion-icon-h,
.product-accordion-icon-v {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 2px;
    background: var(--product-charcoal);
    transform: translate(-50%, -50%);
    transition: opacity 0.25s ease;
}

.product-accordion-icon-v {
    transform: translate(-50%, -50%) rotate(90deg);
}

.product-accordion-panel {
    height: 0;
    overflow: hidden;
    opacity: 0;
    transition: height 0.35s ease, opacity 0.3s ease;
}

.product-accordion-panel.is-open {
    opacity: 1;
}

.product-accordion-body {
    padding: 0 0 20px;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--product-charcoal);
}

#dynamic-spec-material,
#dynamic-spec-shipping {
    color: var(--product-charcoal);
}

/* ── Not found ──────────────────────────────────────────── */
.product-not-found {
    padding: 120px var(--product-safe-x);
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.product-not-found h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.product-not-found p {
    color: var(--product-muted);
    margin-bottom: 24px;
}

/* ── Mobile ─────────────────────────────────────────────── */
@media (max-width: 1023px) {
    .product-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .product-media-col {
        position: static;
        padding: 20px 0 0;
    }

    .product-media-frame {
        max-width: 100%;
    }

    .product-details-col {
        padding: 0 0 64px;
        max-width: none;
        gap: 24px;
    }

    #dynamic-product-title {
        font-size: clamp(1.5rem, 6vw, 2.25rem);
    }
}

@media (max-width: 480px) {
    .product-layout {
        gap: 20px;
    }

    .product-media-col {
        padding-top: 16px;
    }

    .product-details-col {
        gap: 20px;
        padding-bottom: 48px;
    }

    .product-breadcrumbs {
        font-size: 0.6875rem;
        letter-spacing: 0.06em;
    }
}