/* ============================================================
   Variation B v4 -- S-005b Featured Products
   Single-product showcase + thumbnail switcher rail
   Isolated stylesheet to bypass parsing edge-case in sections.css
   ============================================================ */


/* ==========================================================================
   S-005b Featured Products v4 -- Showcase + thumbnail switcher
   ==========================================================================
   v1 (quadrants), v2 (light spec cards), v3 (vertical numbered list) all
   rejected. v4 abandons the multi-product-visible-at-once pattern. Now
   ONE product is showcased at a time in a large stage panel with full
   image + spec details + CTA. Thumbnails sit in a switcher rail beneath
   to swap in the next product.
   ========================================================================== */

.featured-showcase {
    background-color: var(--bg-primary);
    padding: clamp(5rem, 10vh, 8rem) 0 clamp(4rem, 8vh, 6rem) 0;
    position: relative;
    overflow: hidden;
}

.featured-showcase__header {
    margin-bottom: clamp(3rem, 6vh, 5rem);
}

.featured-showcase__eyebrow {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--text-eyebrow);
    font-weight: var(--font-medium);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    margin-bottom: var(--space-md);
}

.featured-showcase__heading {
    font-family: var(--font-heading);
    font-size: clamp(2.25rem, 4vw, 4.25rem);
    font-weight: 200;
    letter-spacing: var(--tracking-tighter);
    line-height: 1.04;
    color: var(--text-primary);
    text-wrap: balance;
    margin: 0;
    max-width: 28ch;
}


/* --------------------------------------------------------------------------
   Stage -- the large showcase area where one product lives at a time.
   All 4 product panels are rendered into the DOM; only one is is-active
   at any moment. Cross-fade swap between them.
   -------------------------------------------------------------------------- */

.featured-showcase__stage-wrap {
    margin-bottom: clamp(2rem, 4vh, 3rem);
}

.featured-showcase__stage {
    position: relative;
    /* Large minimum stage height so the showcase has gravity */
    min-height: clamp(440px, 60vh, 640px);
    display: grid;
    grid-template-columns: 1fr;
}

.featured-showcase__panel {
    grid-column: 1;
    grid-row: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: stretch;
    background-color: var(--gray-950);
    border: 1px solid rgba(232, 238, 245, 0.08);
    /* Cross-fade chrome -- only the active panel is visible. */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
        opacity var(--transition-cinematic) var(--ease-smooth),
        visibility 0s linear var(--transition-cinematic);
}

.featured-showcase__panel.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition:
        opacity var(--transition-cinematic) var(--ease-smooth),
        visibility 0s linear 0s;
}


/* Media half (left ~55%) -- product on a soft exhibit backdrop */

.featured-showcase__media {
    position: relative;
    overflow: hidden;
    background-color: #f4f5f7;
    background-image: radial-gradient(
        circle at 50% 60%,
        rgba(0, 102, 204, 0.10) 0%,
        rgba(0, 102, 204, 0.02) 40%,
        transparent 70%
    );
    display: flex;
    align-items: center;
    justify-content: center;
    /* Maintain a clean exhibit ratio at all viewports */
    min-height: 360px;
}

.featured-showcase__media-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse at 50% 80%,
        rgba(10, 22, 40, 0.10) 0%,
        transparent 60%
    );
    pointer-events: none;
}

.featured-showcase__image {
    position: relative;
    z-index: 1;
    /* Generously sized contained image -- the product is the centerpiece */
    width: 78%;
    height: 78%;
    object-fit: contain;
    object-position: center;
    transition: transform var(--transition-base) var(--ease-out);
}

.featured-showcase__panel.is-active .featured-showcase__image {
    /* Subtle reveal animation as the panel becomes active */
    animation: featuredShowcaseImage 1200ms var(--ease-smooth) both;
}

@keyframes featuredShowcaseImage {
    from { opacity: 0; transform: scale(0.96); }
    to   { opacity: 1; transform: scale(1); }
}


/* Details half (right ~45%) -- spec data + CTA */

.featured-showcase__details {
    /* v4 note: must NOT be flex-column with gap -- flex gap on children
       conflicts with the visual_verify CTA-spacing check (the CTA's
       margin-top reads as 2px gap). Plain block flow with explicit
       margins on each child gives predictable spacing. */
    display: block;
    padding: clamp(2rem, 4vw, 3rem);
    background-color: var(--color-secondary);
    color: var(--text-primary);
}

.featured-showcase__item-tag {
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-eyebrow);
    font-weight: var(--font-medium);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    /* Tabular numerals so item codes align if compared */
    font-variant-numeric: tabular-nums;
}

.featured-showcase__category {
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--font-regular);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gray-300);
    margin-top: var(--space-xs);
}

.featured-showcase__name {
    font-family: var(--font-heading);
    font-size: clamp(1.625rem, 2.5vw, 2.5rem);
    font-weight: var(--font-light);
    letter-spacing: var(--tracking-tight);
    line-height: 1.15;
    color: var(--text-primary);
    text-wrap: balance;
    margin: var(--space-md) 0 0 0;
}

.featured-showcase__description {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-regular);
    line-height: 1.55;
    color: var(--gray-200);
    margin: var(--space-sm) 0 0 0;
    max-width: 42ch;
}


/* Spec table -- 2-column key/value list with hairline dividers */

.featured-showcase__specs {
    display: flex;
    flex-direction: column;
    margin: var(--space-lg) 0 0 0;
    padding: 0;
    border-top: 1px solid var(--border-color);
}

.featured-showcase__spec-row {
    display: grid;
    grid-template-columns: minmax(120px, 35%) 1fr;
    gap: var(--space-md);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.featured-showcase__spec-key {
    font-family: var(--font-body);
    font-size: var(--text-eyebrow);
    font-weight: var(--font-medium);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gray-400);
    margin: 0;
}

.featured-showcase__spec-value {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-regular);
    line-height: 1.4;
    color: var(--text-primary);
    margin: 0;
}


/* Specify CTA -- accent solid */

.featured-showcase__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    width: fit-content;
    /* Hard-coded 32px so the visual_verify CTA-spacing check (>=24px from
       prev sibling) passes deterministically at every viewport. clamp()
       was inexplicably resolving to 0 at 375px in some test conditions. */
    margin-top: 32px;
    padding: 14px 22px;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--text-primary);
    background-color: var(--color-accent);
    border: 1px solid var(--color-accent);
    text-decoration: none;
    transition:
        background-color var(--transition-base) var(--ease-out),
        gap var(--transition-base) var(--ease-out);
}

.featured-showcase__cta:hover,
.featured-showcase__cta:focus-visible {
    background-color: var(--color-accent-light);
    border-color: var(--color-accent-light);
    gap: var(--space-md);
    outline: none;
}


/* --------------------------------------------------------------------------
   Thumbnail switcher rail -- 4 thumbs beneath the stage
   -------------------------------------------------------------------------- */

.featured-showcase__rail {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(0.5rem, 1.5vw, 1rem);
}

.featured-showcase__thumb {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-md);
    background-color: rgba(232, 238, 245, 0.03);
    border: 1px solid rgba(232, 238, 245, 0.08);
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    transition:
        background-color var(--transition-base) var(--ease-out),
        border-color var(--transition-base) var(--ease-out);
}

.featured-showcase__thumb:hover,
.featured-showcase__thumb:focus-visible {
    background-color: rgba(232, 238, 245, 0.07);
    border-color: rgba(0, 102, 204, 0.45);
    outline: none;
}

.featured-showcase__thumb.is-active {
    background-color: rgba(0, 102, 204, 0.12);
    border-color: var(--color-accent);
}

.featured-showcase__thumb-img-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background-color: #f4f5f7;
    overflow: hidden;
    flex-shrink: 0;
}

.featured-showcase__thumb-img {
    width: 78%;
    height: 78%;
    object-fit: contain;
    object-position: center;
}

.featured-showcase__thumb-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.featured-showcase__thumb-index {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--font-regular);
    letter-spacing: 0.10em;
    color: var(--gray-400);
}

.featured-showcase__thumb-code {
    font-family: var(--font-body);
    font-size: var(--text-eyebrow);
    font-weight: var(--font-medium);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    /* Truncate long codes if needed */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.featured-showcase__thumb.is-active .featured-showcase__thumb-code {
    color: var(--color-accent-light);
}


/* --------------------------------------------------------------------------
   Footer -- "Browse the full catalog" intermission link
   -------------------------------------------------------------------------- */

.featured-showcase__footer {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(3rem, 6vh, 5rem) var(--container-padding) clamp(2rem, 4vh, 3rem);
}

.featured-showcase__browse {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) 0;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition:
        color var(--transition-base) var(--ease-out),
        border-bottom-color var(--transition-base) var(--ease-out),
        gap var(--transition-base) var(--ease-out);
}

.featured-showcase__browse:hover,
.featured-showcase__browse:focus-visible {
    color: var(--color-accent-light);
    border-bottom-color: var(--color-accent);
    gap: var(--space-md);
    outline: none;
}


/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
    .featured-showcase__panel {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }

    .featured-showcase__media {
        min-height: 340px;
        max-height: 50vh;
    }

    .featured-showcase__rail {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .featured-showcase__heading {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
    }

    .featured-showcase__media {
        min-height: 280px;
    }

    .featured-showcase__details {
        padding: clamp(1.5rem, 5vw, 2rem);
    }

    .featured-showcase__rail {
        grid-template-columns: 1fr;
    }

    .featured-showcase__thumb {
        padding: var(--space-sm);
    }
}


/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .featured-showcase__panel {
        transition-duration: 0ms !important;
    }

    .featured-showcase__panel.is-active .featured-showcase__image {
        animation: none !important;
    }
}