/**
 * SKPB Product Catalog — Frontend Styles
 * Premium industrial paper/board company catalog design.
 *
 * All selectors are namespaced with .skpb- to prevent theme conflicts.
 */

/* ============================================================
   Google Font Import — Inter
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================================
   CSS Custom Properties (Design Tokens)
   ============================================================ */

.skpb-catalog {
    /* Brand Colors — matching SKPB live website */
    --skpb-primary:          #c8000c;   /* SKPB Brand Red (crimson) */
    --skpb-primary-light:    #e01020;
    --skpb-primary-dark:     #9a0008;
    --skpb-accent:           #0083b0;   /* SKPB Brand Blue (ocean) */
    --skpb-accent-light:     #009ed4;
    --skpb-accent-dark:      #006389;

    --skpb-bg:               #f8f9fb;
    --skpb-bg-card:          #ffffff;
    --skpb-bg-section:       #f0f4f8;
    --skpb-text-primary:     #1a1a2e;
    --skpb-text-secondary:   #4a5568;
    --skpb-text-muted:       #8a96a3;
    --skpb-border:           #e2e8f0;
    --skpb-border-light:     #edf2f7;

    /* Spacing */
    --skpb-space-xs:    0.5rem;
    --skpb-space-sm:    1rem;
    --skpb-space-md:    1.5rem;
    --skpb-space-lg:    2.5rem;
    --skpb-space-xl:    4rem;

    /* Typography */
    --skpb-font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

    /* Card */
    --skpb-card-radius: 10px;
    --skpb-card-shadow: 0 2px 12px rgba(26, 58, 92, 0.08);
    --skpb-card-shadow-hover: 0 8px 32px rgba(26, 58, 92, 0.16);

    /* Transition */
    --skpb-transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);

    /* Container constraints & centering - fits cleanly inside theme */
    width: 100%;
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
    padding-left: clamp(16px, 3.5vw, 36px);
    padding-right: clamp(16px, 3.5vw, 36px);
    padding-top: clamp(28px, 4vw, 48px);
    padding-bottom: clamp(48px, 6vw, 80px);
    box-sizing: border-box;

    /* Apply base styles */
    font-family: var(--skpb-font);
    color: var(--skpb-text-primary);
    background: transparent;
    line-height: 1.6;
}

.skpb-catalog *,
.skpb-catalog *::before,
.skpb-catalog *::after {
    box-sizing: inherit;
}

.skpb-catalog img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   Catalog Header / Hero
   ============================================================ */

.skpb-catalog-header {
    text-align: center;
    padding: var(--skpb-space-lg) var(--skpb-space-sm);
    margin-bottom: var(--skpb-space-lg);
    border-bottom: 2px solid var(--skpb-border);
    position: relative;
}

.skpb-catalog-header::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--skpb-primary);
    margin: var(--skpb-space-sm) auto 0;
    border-radius: 2px;
}

.skpb-catalog-title {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 700;
    color: #111111;
    margin: 0 0 var(--skpb-space-xs);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.skpb-catalog-subtitle {
    font-size: 1.05rem;
    color: var(--skpb-text-secondary);
    margin: 0;
    max-width: 560px;
    margin-inline: auto;
}

/* ============================================================
   Breadcrumbs
   ============================================================ */

.skpb-breadcrumbs {
    margin-bottom: var(--skpb-space-md);
    padding: var(--skpb-space-xs) 0;
    border-bottom: 1px solid var(--skpb-border-light);
}

.skpb-breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.82rem;
    color: var(--skpb-text-muted);
}

.skpb-breadcrumb-item {
    display: flex;
    align-items: center;
}

.skpb-breadcrumb-link {
    color: var(--skpb-accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--skpb-transition);
}

.skpb-breadcrumb-link:hover,
.skpb-breadcrumb-link:focus {
    color: var(--skpb-accent);
    text-decoration: underline;
}

.skpb-breadcrumb-sep {
    color: var(--skpb-border);
    margin: 0 0.25rem;
    user-select: none;
}

.skpb-breadcrumb-current {
    color: var(--skpb-text-primary);
    font-weight: 600;
}

@media (max-width: 600px) {
    .skpb-breadcrumb-list {
        font-size: 0.75rem;
    }
}

/* ============================================================
   Catalog Grid
   ============================================================ */

.skpb-catalog-grid {
    display: grid;
    gap: var(--skpb-space-md);
    margin-bottom: var(--skpb-space-lg);
}

/* Column classes */
.skpb-cols-1 { grid-template-columns: minmax(0, 600px); justify-content: center; }
.skpb-cols-2 { grid-template-columns: repeat(2, 1fr); }
.skpb-cols-3 { grid-template-columns: repeat(3, 1fr); }
.skpb-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .skpb-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .skpb-cols-3,
    .skpb-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .skpb-cols-1,
    .skpb-cols-2,
    .skpb-cols-3,
    .skpb-cols-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   Catalog Card
   ============================================================ */

.skpb-catalog-card {
    background: var(--skpb-bg-card);
    border-radius: var(--skpb-card-radius);
    border: 1px solid var(--skpb-border);
    overflow: hidden;
    box-shadow: var(--skpb-card-shadow);
    transition: transform var(--skpb-transition), box-shadow var(--skpb-transition), border-color var(--skpb-transition);
    display: flex;
    flex-direction: column;
}

.skpb-catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--skpb-card-shadow-hover);
    border-color: rgba(26, 58, 92, 0.2);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    .skpb-catalog-card { transition: box-shadow var(--skpb-transition); }
    .skpb-catalog-card:hover { transform: none; }
}

.skpb-card-link {
    display: flex;
    flex-direction: column;
    flex: 1;
    text-decoration: none;
    color: inherit;
    outline-offset: 3px;
}

.skpb-card-link:focus-visible {
    outline: 2px solid var(--skpb-accent);
    outline-offset: 2px;
    border-radius: var(--skpb-card-radius);
}

/* ---- Card Image ---- */

.skpb-card-image-wrap {
    overflow: hidden;
    background: var(--skpb-bg-section);
    position: relative;
}

/* Aspect ratio classes */
.skpb-ratio-4x3 .skpb-card-image,
.skpb-ratio-4x3 .skpb-card-placeholder {
    aspect-ratio: 4/3;
}

.skpb-ratio-1x1 .skpb-card-image,
.skpb-ratio-1x1 .skpb-card-placeholder {
    aspect-ratio: 1/1;
}

.skpb-ratio-16x9 .skpb-card-image,
.skpb-ratio-16x9 .skpb-card-placeholder {
    aspect-ratio: 16/9;
}

.skpb-ratio-3x2 .skpb-card-image,
.skpb-ratio-3x2 .skpb-card-placeholder {
    aspect-ratio: 3/2;
}

.skpb-ratio-auto .skpb-card-image { min-height: 200px; }

.skpb-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease, filter 0.3s ease;
}

.skpb-catalog-card:hover .skpb-card-image {
    transform: scale(1.04);
    filter: brightness(1.03);
}

.skpb-card-placeholder {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--skpb-border);
    background: linear-gradient(135deg, #f0f4f8 0%, #e8edf3 100%);
}

/* ---- Card Body ---- */

.skpb-card-body {
    padding: var(--skpb-space-md) var(--skpb-space-md) var(--skpb-space-sm);
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: var(--skpb-space-xs);
}

.skpb-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
    transition: color var(--skpb-transition);
}

.skpb-catalog-card:hover .skpb-card-title {
    color: var(--skpb-primary);
}

.skpb-card-desc {
    font-size: 0.88rem;
    color: var(--skpb-text-secondary);
    margin: 0;
    line-height: 1.55;
    flex: 1;
}

.skpb-card-cta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--skpb-accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: auto;
    padding-top: var(--skpb-space-xs);
    border-top: 1px solid var(--skpb-border-light);
    transition: gap var(--skpb-transition), color var(--skpb-transition);
}

.skpb-catalog-card:hover .skpb-card-cta {
    gap: 10px;
    color: var(--skpb-accent-dark);
}

.skpb-cta-arrow {
    flex-shrink: 0;
    transition: transform var(--skpb-transition);
}

.skpb-catalog-card:hover .skpb-cta-arrow {
    transform: translateX(3px);
}

/* ============================================================
   Item Detail Page
   ============================================================ */

.skpb-item-page {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.skpb-item-header {
    margin-bottom: var(--skpb-space-lg);
    padding-bottom: var(--skpb-space-md);
    border-bottom: 2px solid var(--skpb-border-light);
    position: relative;
}

.skpb-item-header::before {
    content: '';
    display: block;
    width: 44px;
    height: 4px;
    background: var(--skpb-primary);
    margin-bottom: var(--skpb-space-sm);
    border-radius: 2px;
}

.skpb-item-title {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.skpb-item-short-desc {
    font-size: 1.05rem;
    color: var(--skpb-text-secondary);
    margin: 0;
    max-width: 760px;
    line-height: 1.65;
}

/* ---- Featured Image ---- */

.skpb-item-featured-image {
    margin-bottom: var(--skpb-space-lg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--skpb-border);
}

.skpb-featured-img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
    display: block;
}

/* ---- Content ---- */

.skpb-item-content {
    margin-bottom: var(--skpb-space-xl);
    padding: 28px 36px;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid var(--skpb-border);
    border-left: 5px solid var(--skpb-primary);
    box-shadow: 0 2px 14px rgba(26, 58, 92, 0.05);
}

.skpb-content-body {
    color: var(--skpb-text-secondary);
    font-size: 0.98rem;
    line-height: 1.75;
}

.skpb-content-body p  { margin: 0 0 1em; }
.skpb-content-body p:last-child { margin-bottom: 0; }
.skpb-content-body h2 { font-size: 1.25rem; color: var(--skpb-primary); margin: 1.4em 0 0.5em; font-weight: 700; }
.skpb-content-body h3 { font-size: 1.1rem; color: var(--skpb-primary); margin: 1.2em 0 0.4em; font-weight: 700; }
.skpb-content-body ul,
.skpb-content-body ol { margin: 0.5em 0 1em 1.5em; padding-left: 0; }
.skpb-content-body li { margin-bottom: 0.35em; line-height: 1.6; }
.skpb-content-body strong { color: var(--skpb-text-primary); font-weight: 600; }

/* ---- Custom Button ---- */

.skpb-item-actions {
    margin-bottom: var(--skpb-space-lg);
}

.skpb-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.7rem 1.6rem;
    border-radius: 6px;
    font-family: var(--skpb-font);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--skpb-transition);
    letter-spacing: 0.02em;
}

.skpb-btn-primary {
    background: var(--skpb-accent);
    color: #fff;
    border-color: var(--skpb-accent);
}

.skpb-btn-primary:hover,
.skpb-btn-primary:focus {
    background: var(--skpb-accent-dark);
    border-color: var(--skpb-accent-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 131, 176, 0.35);
}

/* ---- Children Section ---- */

.skpb-children-section {
    margin-top: var(--skpb-space-xl);
    padding-top: var(--skpb-space-lg);
    border-top: 1px solid var(--skpb-border-light);
}

.skpb-children-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 var(--skpb-space-lg);
    padding-bottom: var(--skpb-space-xs);
    display: flex;
    align-items: center;
    gap: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.skpb-children-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 22px;
    background: var(--skpb-primary);
    border-radius: 2px;
}

/* ============================================================
   Gallery
   ============================================================ */

.skpb-catalog-gallery {
    margin-bottom: var(--skpb-space-xl);
}

.skpb-gallery-heading {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--skpb-primary);
    margin: 0 0 var(--skpb-space-md);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.skpb-gallery-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--skpb-border);
}

/* ---- Grid Layout ---- */

.skpb-gallery-grid .skpb-gallery-main {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--skpb-border);
    margin-bottom: 14px;
    cursor: zoom-in;
    display: block;
    background: #f8f9fb;
    box-shadow: 0 4px 20px rgba(26, 58, 92, 0.06);
}

.skpb-gallery-main a {
    display: block;
    position: relative;
    text-decoration: none;
}

.skpb-gallery-main-img {
    width: 100%;
    height: auto;
    max-height: 480px;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.skpb-gallery-main a:hover .skpb-gallery-main-img {
    transform: scale(1.02);
}

.skpb-gallery-zoom-icon {
    position: absolute;
    bottom: 14px;
    right: 14px;
    background: rgba(255,255,255,0.92);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
    box-shadow: 0 2px 10px rgba(0,0,0,.18);
    color: var(--skpb-primary);
}

.skpb-gallery-main a:hover .skpb-gallery-zoom-icon {
    opacity: 1;
}

/* ---- Thumbnails Strip ---- */

.skpb-gallery-thumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.skpb-gallery-thumb-item {
    width: 110px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--skpb-border);
    transition: border-color var(--skpb-transition), transform var(--skpb-transition), box-shadow var(--skpb-transition);
    aspect-ratio: auto;
    cursor: pointer;
    flex-shrink: 0;
    background: var(--skpb-bg-section);
}

.skpb-gallery-thumb-item:hover,
.skpb-gallery-thumb-item:focus-visible {
    border-color: var(--skpb-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 131, 176, 0.25);
    outline: none;
}

.skpb-gallery-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ---- Grid All Layout (slider mode) ---- */

.skpb-gallery-grid-all {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.skpb-gallery-grid-item {
    display: block;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--skpb-border);
    transition: transform var(--skpb-transition), box-shadow var(--skpb-transition);
    aspect-ratio: 4/3;
}

.skpb-gallery-grid-item:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0,0,0,.12);
}

.skpb-gallery-grid-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@media (max-width: 768px) {
    .skpb-catalog {
        padding-left: 16px;
        padding-right: 16px;
        padding-top: 20px;
        padding-bottom: 40px;
    }
    .skpb-gallery-grid-all { grid-template-columns: repeat(2, 1fr); }
    .skpb-gallery-thumb-item { width: 90px; height: 68px; }
    .skpb-item-content { padding: 20px 22px; }
}

@media (max-width: 480px) {
    .skpb-gallery-grid-all { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .skpb-gallery-thumb-item { width: 75px; height: 56px; }
    .skpb-gallery-main-img { aspect-ratio: 4 / 3; max-height: 320px; }
}

/* ============================================================
   Back Navigation
   ============================================================ */

.skpb-back-nav {
    margin-top: var(--skpb-space-xl);
    padding-top: var(--skpb-space-md);
    border-top: 1px solid var(--skpb-border-light);
}

.skpb-back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--skpb-accent);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    transition: color var(--skpb-transition), border-color var(--skpb-transition), transform var(--skpb-transition), box-shadow var(--skpb-transition);
    border-radius: 6px;
    padding: 8px 16px;
    background: #ffffff;
    border: 1px solid var(--skpb-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.skpb-back-link:hover,
.skpb-back-link:focus-visible {
    color: var(--skpb-accent-dark);
    border-color: var(--skpb-accent);
    transform: translateX(-4px);
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 131, 176, 0.15);
    outline: none;
}

.skpb-back-link svg {
    transition: transform var(--skpb-transition);
}

.skpb-back-link:hover svg {
    transform: translateX(-3px);
}

/* ============================================================
   Empty State
   ============================================================ */

.skpb-empty-state {
    text-align: center;
    padding: var(--skpb-space-xl) var(--skpb-space-sm);
    color: var(--skpb-text-muted);
}

.skpb-empty-state svg {
    display: block;
    margin: 0 auto var(--skpb-space-sm);
    color: var(--skpb-border);
}

.skpb-empty-state p {
    font-size: 1rem;
    font-style: italic;
    margin: 0;
}

/* ============================================================
   GLightbox Overrides — Professional lightbox appearance
   ============================================================ */

.glightbox-open { overflow: hidden; }

.goverlay { background: rgba(10, 20, 35, 0.97); }

.gslide-image img {
    border-radius: 6px;
}

.gslide-title {
    font-family: var(--skpb-font) !important;
    font-size: 0.95rem !important;
    font-weight: 600 !important;
    color: #fff !important;
}

.gslide-description {
    font-family: var(--skpb-font) !important;
    font-size: 0.85rem !important;
    color: rgba(255,255,255,0.75) !important;
}

.gnext, .gprev {
    background: rgba(255,255,255,0.1) !important;
    border: 1px solid rgba(255,255,255,0.2) !important;
    border-radius: 50% !important;
    width: 50px !important;
    height: 50px !important;
    transition: background 0.25s ease !important;
}

.gnext:hover, .gprev:hover {
    background: rgba(255,255,255,0.2) !important;
}

.gclose {
    background: rgba(255,255,255,0.1) !important;
    border: 1px solid rgba(255,255,255,0.2) !important;
    border-radius: 50% !important;
    width: 40px !important;
    height: 40px !important;
}

/* ============================================================
   Lightbox trigger focus state
   ============================================================ */

.skpb-lightbox-trigger:focus-visible {
    outline: 2px solid var(--skpb-accent);
    outline-offset: 3px;
    border-radius: 6px;
}

/* ============================================================
   Animations (disabled via JS if setting is off)
   ============================================================ */

.skpb-catalog[data-animations="0"] .skpb-catalog-card,
.skpb-catalog[data-animations="0"] .skpb-catalog-card:hover {
    transform: none !important;
    transition: box-shadow 0.2s ease !important;
}

.skpb-catalog[data-animations="0"] .skpb-card-image {
    transform: none !important;
}

/* ============================================================
   Entry animation
   ============================================================ */

@keyframes skpb-fade-up {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.skpb-catalog[data-animations="1"] .skpb-catalog-card {
    animation: skpb-fade-up 0.4s ease both;
}

.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(1) { animation-delay: 0.05s; }
.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(2) { animation-delay: 0.10s; }
.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(3) { animation-delay: 0.15s; }
.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(4) { animation-delay: 0.20s; }
.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(5) { animation-delay: 0.25s; }
.skpb-catalog[data-animations="1"] .skpb-catalog-card:nth-child(n+6) { animation-delay: 0.30s; }

@media (prefers-reduced-motion: reduce) {
    .skpb-catalog[data-animations="1"] .skpb-catalog-card {
        animation: none;
    }
}

/* ============================================================
   Responsive — Tablet
   ============================================================ */

@media (max-width: 768px) {
    .skpb-catalog-header { padding: var(--skpb-space-md) var(--skpb-space-sm); }
    .skpb-item-content   { padding: var(--skpb-space-md); }
    .skpb-gallery-main-img { max-height: 350px; }
}

/* ============================================================
   Responsive — Mobile
   ============================================================ */

@media (max-width: 480px) {
    .skpb-catalog-title  { font-size: 1.4rem; }
    .skpb-item-title     { font-size: 1.3rem; }
    .skpb-catalog-grid   { gap: var(--skpb-space-sm); }
    .skpb-gallery-grid-all { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .skpb-gallery-thumbs   { grid-template-columns: repeat(3, 1fr); }
    .skpb-gallery-main-img { max-height: 280px; }
    .skpb-item-content   { padding: 1rem; border-left-width: 3px; }
}

/* ============================================================
   Print
   ============================================================ */

@media print {
    .skpb-back-nav,
    .skpb-breadcrumbs { display: none; }
    .skpb-catalog-card { box-shadow: none; border: 1px solid #ccc; }
}