/* ==========================================================================
   KARBÜRBURADA — SINGLE PRODUCT PAGE (PREMIUM)
   ========================================================================== */

:root {
    --kb-navy: #303030;
    --kb-blue: #E31E24;
    --kb-red: #E31E24;
    --kb-gold: #D4AF37;
    --kb-gold-light: #F1D592;
    --kb-dark: #1a0304;
    --kb-gray: #f8fafc;
    --kb-border: #e2e8f0;
    --kb-text: #303030;
    --kb-accent-gradient: linear-gradient(135deg, #E31E24 0%, #ff6b35 100%);
    --kb-gold-gradient: linear-gradient(135deg, #D4AF37 0%, #F1D592 100%);
    --kb-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== BREADCRUMB ==================== */
.kb-breadcrumb {
    background: white;
    padding: 16px 0;
    border-bottom: 1px solid var(--kb-border);
    margin-bottom: 30px;
}

.kb-breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: #64748b;
    flex-wrap: wrap;
}

.kb-breadcrumb a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
}

.kb-breadcrumb a:hover {
    color: var(--kb-red);
}

.kb-breadcrumb i {
    font-size: 0.65rem;
    color: #cbd5e1;
}

.kb-breadcrumb .current {
    color: var(--kb-navy);
    font-weight: 700;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==================== MAIN GRID ==================== */
.kb-product-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 48px;
    margin-bottom: 40px;
    align-items: start;
}

.kb-visuals,
.kb-content {
    min-width: 0;
}

@media (max-width: 992px) {
    .kb-product-grid {
        grid-template-columns: 1fr !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 24px !important;
        padding: 0 !important;
        width: 100% !important;
    }
    
    .kb-visuals, .kb-content {
        width: 100% !important;
        max-width: 100% !important;
        flex: 1 1 auto !important;
    }
}

/* Single-product main container should always be 100% width */
.kb-sp-main {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 16px !important;
    padding-right: 16px !important;
    overflow-x: hidden !important;
    box-sizing: border-box !important;
}

@media (max-width: 768px) {
    /* Trust bar: 1 column */
    .kb-trust-bar-product {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }

    /* Specs grid: 1 column */
    .kb-specs-grid {
        grid-template-columns: 1fr !important;
        padding: 16px !important;
    }
}

/* ==================== GALLERY ==================== */
.kb-gallery {
    position: sticky;
    top: 100px;
}

.kb-main-image {
    border-radius: 16px;
    border: 1px solid var(--kb-border);
    overflow: hidden;
    background: white;
    box-shadow:
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 10px 15px -3px rgba(0, 0, 0, 0.03);
    margin-bottom: 16px;
    position: relative;
    width: 100%;
    /* Dikey görseller için sabit yükseklik yerine 3:4 oran */
    aspect-ratio: 3 / 4;
    height: auto;
    max-height: 520px; /* PC'de aşırı büyümesini engellemek için */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: zoom-in;
    transition: box-shadow 0.3s var(--kb-ease);
}

.kb-main-image:hover {
    box-shadow:
        0 10px 25px -5px rgba(0, 0, 0, 0.1),
        0 20px 40px -10px rgba(0, 0, 0, 0.06);
}

.kb-main-image img {
    position: absolute; /* Tam container ortalaması için */
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain !important; /* Asla kesilmemeli */
    object-position: center;
    padding: 24px;
    transition: transform 0.5s var(--kb-ease);
    image-rendering: -webkit-optimize-contrast;
    display: block;
}

@media (max-width: 1200px) {
    .kb-product-grid {
        grid-template-columns: 360px 1fr;
        gap: 32px;
    }
    .kb-main-image {
        max-height: 480px;
    }
}

@media (max-width: 1024px) {
    .kb-main-image {
        max-height: none;   
    }
}

@media (max-width: 768px) {
    .kb-main-image {
        max-height: none;
        border-radius: 12px;
    }
    .kb-main-image img {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .kb-main-image {
        max-height: none;
        border-radius: 10px;
    }
    .kb-main-image img {
        padding: 12px;
    }
}

.kb-main-image:hover img {
    transform: scale(1.05);
}

/* Sale badge overlay */
.kb-main-image > div[style*="position: absolute"] {
    font-family: 'Outfit', sans-serif !important;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.8rem !important;
    box-shadow: 0 4px 12px rgba(227, 30, 36, 0.3);
}

/* Thumbnails */
.kb-thumbnails {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.kb-thumb {
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s var(--kb-ease);
    /* Dikey görseller için sabit oran - ana görsel ile tutarlı */
    aspect-ratio: 3 / 4;
    padding: 4px;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.kb-thumb:hover {
    border-color: var(--kb-gold);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(212, 175, 55, 0.2);
}

.kb-thumb.active {
    border-color: var(--kb-red);
    box-shadow: 0 4px 12px rgba(227, 30, 36, 0.15);
}

.kb-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain !important;
    border-radius: 6px;
    padding: 2px;
}
@media (max-width: 480px) {
    .kb-thumbnails {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }
}

/* ==================== PRODUCT HEADER ==================== */
.kb-product-header {
    margin-bottom: 28px;
    border-bottom: 1px solid var(--kb-border);
    padding-bottom: 24px;
}

.kb-category-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--kb-gold-gradient);
    color: var(--kb-dark);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.25);
    transition: transform 0.2s, box-shadow 0.2s;
}

.kb-category-badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.35);
}

.kb-product-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.85rem;
    color: var(--kb-navy);
    margin: 0 0 12px 0;
    font-weight: 800;
    line-height: 1.25;
    position: relative;
}

.kb-sku-badge {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    background: #f1f5f9;
    color: #475569;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--kb-border);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ==================== PRICE BOX ==================== */
.kb-price-box {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.kb-current-price {
    font-family: 'Outfit', sans-serif;
    font-size: 2.25rem;
    color: var(--kb-navy);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.kb-current-price del {
    font-size: 1.1rem;
    color: #94a3b8;
    font-weight: 500;
}

.kb-current-price ins {
    text-decoration: none;
    color: var(--kb-red);
}

/* Stock Status */
.kb-stock-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 8px 18px;
    border-radius: 99px;
    letter-spacing: 0.3px;
}

.kb-stock-in {
    background: #dcfce7;
    color: #166534;
    position: relative;
}

.kb-stock-in i {
    animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.kb-stock-out {
    background: #fee2e2;
    color: #991b1b;
}

/* ==================== TRUST BAR ==================== */
.kb-trust-bar-product {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--kb-border);
}

.kb-trust-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid var(--kb-border);
    transition: all 0.25s var(--kb-ease);
}

.kb-trust-item:hover {
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.kb-trust-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.kb-trust-icon.shipping {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.kb-trust-icon.secure {
    background: rgba(59, 130, 246, 0.1);
    color: #2563eb;
}

.kb-trust-icon.quality {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
}

.kb-trust-text h4 {
    margin: 0;
    font-size: 0.82rem;
    color: var(--kb-navy);
    font-weight: 700;
}

.kb-trust-text p {
    margin: 2px 0 0;
    font-size: 0.72rem;
    color: #94a3b8;
    line-height: 1.3;
}

@media (max-width: 768px) {
    .kb-trust-bar-product {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

/* ==================== SPECS GRID ==================== */
.kb-specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    background: white;
    padding: 28px;
    border-radius: 16px;
    border: 1px solid var(--kb-border);
    margin: 24px 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04);
}

.kb-spec-item {
    display: flex;
    align-items: start;
    gap: 14px;
    padding: 12px;
    border-radius: 12px;
    transition: all 0.25s var(--kb-ease);
}

.kb-spec-item:hover {
    background: #f8fafc;
    transform: translateY(-2px);
}

.kb-spec-icon {
    width: 44px;
    height: 44px;
    background: rgba(227, 30, 36, 0.08);
    color: var(--kb-red);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: all 0.3s;
}

.kb-spec-item:hover .kb-spec-icon {
    background: var(--kb-accent-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(227, 30, 36, 0.25);
}

.kb-spec-content h4 {
    margin: 0 0 4px 0;
    font-size: 0.9rem;
    color: var(--kb-navy);
    font-weight: 700;
}

.kb-spec-content p {
    margin: 0;
    font-size: 0.82rem;
    color: #64748b;
    line-height: 1.45;
}

/* ==================== FILTER TOOLBAR ==================== */
.kb-filter-toolbar {
    background: var(--kb-navy);
    padding: 16px 20px;
    border-radius: 14px 14px 0 0;
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.kb-search-input {
    flex: 1;
    min-width: 200px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    transition: all 0.25s;
}

.kb-search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.kb-search-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.kb-filter-check {
    color: white;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    cursor: pointer;
    user-select: none;
    font-weight: 500;
}

.kb-filter-check input {
    width: 18px;
    height: 18px;
    accent-color: var(--kb-red);
}

.kb-sort-select {
    background: white;
    border: none;
    padding: 10px 32px 10px 16px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--kb-navy);
    cursor: pointer;
    transition: box-shadow 0.2s;
}

.kb-sort-select:focus {
    box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.15);
}

/* ==================== CAMPAIGN BADGE ==================== */
.kb-row-campaign {
    background-color: rgba(255, 193, 7, 0.08) !important;
}

.kb-badge-campaign {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, #FFC107, #FFD54F);
    color: #000;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    margin-left: 8px;
    vertical-align: middle;
    text-transform: uppercase;
    box-shadow: 0 2px 6px rgba(255, 193, 7, 0.3);
    letter-spacing: 0.3px;
}

.kb-badge-campaign i {
    font-size: 9px;
}

/* ==================== VARIATIONS TABLE ==================== */
.kb-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--kb-border);
    border-top: none;
    border-radius: 0 0 14px 14px;
    background: white;
    box-shadow: 0 10px 25px -8px rgba(0, 0, 0, 0.06);
}

.kb-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.kb-table th {
    background: #f8fafc;
    color: #475569;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 14px 12px;
    border-bottom: 2px solid var(--kb-border);
    position: sticky;
    top: 0;
    z-index: 5;
}

.kb-table td {
    padding: 13px 12px;
    border-bottom: 1px solid #f1f5f9;
    text-align: center;
    color: var(--kb-text);
    transition: background 0.15s, border-color 0.15s;
}

.kb-table tbody tr {
    transition: all 0.15s var(--kb-ease);
}

.kb-table tbody tr:nth-child(even) td {
    background: rgba(248, 250, 252, 0.5);
}

.kb-table tbody tr:hover td {
    background: rgba(227, 30, 36, 0.03);
}

.kb-table tbody tr:hover {
    box-shadow: inset 3px 0 0 var(--kb-red);
}

.kb-table tr:last-child td {
    border-bottom: none;
}

/* In Stock Rows */
.kb-row-instock td {
    background: rgba(34, 197, 94, 0.03);
}

.kb-row-instock:hover td {
    background: rgba(34, 197, 94, 0.07);
}

@media (max-width: 768px) {
    .kb-table-wrapper {
        margin: 0 -15px; /* Pull to edges on mobile */
        border-radius: 0;
        width: calc(100% + 30px);
        max-width: none;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-left: none;
        border-right: none;
    }

    .kb-table th {
        padding: 12px 8px;
        font-size: 0.7rem;
        white-space: nowrap;
    }

    .kb-table td {
        padding: 10px 8px;
        font-size: 0.8rem;
    }
    
    .kb-qty-input {
        width: 50px;
        height: 38px;
        padding: 4px;
    }
    
    .kb-add-btn {
        width: 38px;
        height: 38px;
    }

    .kb-current-price {
        font-size: 1.75rem;
    }

    .kb-product-title {
        font-size: 1.4rem;
    }
    
    .kb-spec-item {
        padding: 10px;
        gap: 10px;
    }
    
    .kb-spec-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}

/* ==================== ACTION BUTTONS ==================== */
.kb-qty-input {
    width: 58px;
    padding: 8px;
    border: 1px solid var(--kb-border);
    border-radius: 8px;
    text-align: center;
    font-weight: 700;
    color: var(--kb-navy);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.kb-qty-input:focus {
    border-color: var(--kb-red);
    box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.1);
}

.kb-add-btn {
    background: var(--kb-accent-gradient);
    color: white;
    border: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s var(--kb-ease);
    box-shadow: 0 4px 12px rgba(227, 30, 36, 0.2);
    font-size: 0.95rem;
}

.kb-add-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 20px rgba(227, 30, 36, 0.35);
}

.kb-add-btn:active {
    transform: translateY(0) scale(0.98);
}

/* ==================== TABS ==================== */
.kb-tabs {
    margin-top: 48px;
}

.kb-tab-nav {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--kb-border);
    margin-bottom: 0;
    overflow-x: auto;
}

.kb-tab-btn {
    padding: 14px 28px;
    background: transparent;
    border: none;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: #94a3b8;
    cursor: pointer;
    position: relative;
    border-radius: 10px 10px 0 0;
    transition: all 0.25s var(--kb-ease);
    white-space: nowrap;
}

.kb-tab-btn:hover {
    color: var(--kb-navy);
    background: rgba(0, 0, 0, 0.02);
}

.kb-tab-btn.active {
    color: var(--kb-red);
    background: white;
}

.kb-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--kb-accent-gradient);
    border-radius: 3px 3px 0 0;
}

.kb-tab-content {
    display: none;
    padding: 28px;
    background: white;
    border-radius: 0 0 16px 16px;
    border: 1px solid var(--kb-border);
    border-top: none;
    line-height: 1.7;
    color: var(--kb-text);
    font-size: 0.95rem;
}

.kb-tab-content.active {
    display: block;
    animation: tabFadeIn 0.35s var(--kb-ease);
}

@keyframes tabFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== RELATED PRODUCTS ==================== */
.kb-related-section {
    margin-top: 64px;
}

.kb-related-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    color: var(--kb-navy);
    margin-bottom: 28px;
    padding-left: 18px;
    position: relative;
    font-weight: 800;
}

.kb-related-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--kb-accent-gradient);
    border-radius: 2px;
}

.kb-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 20px;
}

.kb-related-card {
    text-decoration: none !important;
    display: block;
    background: white;
    border: 1px solid var(--kb-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s var(--kb-ease);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.kb-related-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(227, 30, 36, 0.15);
}

.kb-related-card-img {
    aspect-ratio: 1;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
    overflow: hidden;
}

.kb-related-card-img img {
    max-width: 100%;
    max-height: 100%;
    mix-blend-mode: multiply;
    transition: transform 0.5s var(--kb-ease);
}

.kb-related-card:hover .kb-related-card-img img {
    transform: scale(1.1);
}

.kb-related-card-body {
    padding: 18px;
}

.kb-related-card-body h4 {
    margin: 0 0 10px 0;
    font-size: 0.92rem;
    color: var(--kb-navy);
    font-weight: 700;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-related-card-body .price {
    color: var(--kb-red);
    font-weight: 800;
    font-size: 1rem;
}

/* ==================== SOCIAL SHARE ==================== */
.kb-share-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    padding-top: 16px;
}

.kb-share-label {
    font-size: 0.82rem;
    color: #94a3b8;
    font-weight: 600;
}

.kb-share-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--kb-border);
    background: white;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s var(--kb-ease);
}

.kb-share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.kb-share-btn.whatsapp:hover {
    background: #25d366;
    color: white;
    border-color: #25d366;
}

.kb-share-btn.twitter:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.kb-share-btn.facebook:hover {
    background: #1877f2;
    color: white;
    border-color: #1877f2;
}

.kb-share-btn.copy:hover {
    background: var(--kb-navy);
    color: white;
    border-color: var(--kb-navy);
}

/* ==================== MOBILE STICKY BAR ==================== */
.kb-mobile-sticky-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--kb-border);
    padding: 12px 20px;
    z-index: 9990;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.kb-mobile-sticky-bar .sticky-price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--kb-navy);
}

/* ==========================================================================
   3D VIEWER V6 UNIVERSAL UI (PREMIUM FIX)
   ========================================================================== */

.kb-pro-3d-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    background: #020617; /* Deep Space */
    border-radius: 16px;
    overflow: hidden;
    user-select: none;
    font-family: 'JetBrains Mono', 'Outfit', sans-serif;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* --- HUD Overlays --- */
.kb-pro-3d-hud-top-left, .kb-pro-3d-hud-top-right {
    position: absolute;
    top: 60px;
    z-index: 110;
    display: flex;
    align-items: center;
    gap: 10px;
    pointer-events: none;
}

.kb-pro-3d-hud-top-left { left: 20px; }
.kb-pro-3d-hud-top-right { right: 20px; flex-direction: row-reverse; }

.kb-hud-line {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, #6366f1, transparent);
}
.kb-pro-3d-hud-top-right .kb-hud-line { background: linear-gradient(-90deg, #6366f1, transparent); }

.kb-hud-text {
    font-size: 9px;
    color: #6366f1;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.kb-pro-3d-hud-bottom-center {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 110;
    width: 200px;
    pointer-events: none;
}

.kb-scan-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.kb-scan-label {
    font-size: 8px;
    color: #10b981;
    font-weight: 800;
    letter-spacing: 2px;
    animation: kb-blink 1s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.kb-scan-progress {
    width: 100%;
    height: 2px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.kb-scan-fill {
    width: 100%;
    height: 100%;
    background: #10b981;
    box-shadow: 0 0 10px #10b981;
    animation: kb-scan-move 3s linear infinite;
}

@keyframes kb-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
@keyframes kb-scan-move { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }

/* Canvas Area */
#kb-stl-viewer-v5 {
    flex: 1;
    width: 100%;
    height: 100%;
    position: relative;
    background: #020617; /* Dark Scene */
}

/* --- Top Bar --- */
.kb-pro-3d-top {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 120;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: linear-gradient(to bottom, rgba(2, 6, 23, 0.9), transparent);
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.kb-pro-3d-top-left, .kb-pro-3d-top-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Button Base */
.kb-pro-3d-btn, .kb-pro-3d-action, .kb-pro-3d-icon, .kb-pro-tool-btn {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #94a3b8;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.kb-pro-3d-btn i, .kb-pro-3d-icon i, .kb-pro-tool-btn i {
    font-size: 14px;
    color: #6366f1;
}

.kb-pro-3d-btn:hover, .kb-pro-3d-action:hover, .kb-pro-3d-icon:hover, .kb-pro-tool-btn:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: #6366f1;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.kb-pro-3d-btn.active, .kb-pro-tool-btn.active {
    background: #6366f1;
    border-color: #6366f1;
    color: #fff;
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.5);
}

.kb-pro-3d-btn.active i, .kb-pro-tool-btn.active i { color: #fff; }

/* Top Center - Header */
.kb-pro-3d-top-center .kb-pro-searches {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.05);
    padding: 6px 14px;
    border-radius: 99px;
    color: white;
    font-size: 12px;
    font-weight: 700;
    border: 1px solid rgba(255,255,255,0.1);
    cursor: pointer;
}

.kb-pro-3d-top-center .kb-pro-searches:hover {
    background: rgba(255,255,255,0.1);
}

/* --- Left Toolbar --- */
.kb-pro-3d-left {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.kb-pro-tool-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
}

/* --- Watermark --- */
.kb-pro-3d-watermark {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 120;
    color: #475569;
    font-size: 10px;
    pointer-events: none;
    font-family: 'JetBrains Mono', monospace;
}

.kb-pro-3d-watermark i {
    margin-right: 4px;
}

.kb-pro-3d-copy {
    font-size: 9px;
    opacity: 0.6;
    margin-top: 2px;
}

/* --- Bottom Right Group --- */
.kb-pro-3d-bottom-right {
    position: absolute;
    bottom: 16px;
    right: 16px;
    z-index: 100;
    display: flex;
    gap: 8px;
}

/* --- 🧊 3D VIEW CUBE --- */
.kb-pro-3d-cube-container {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 100px;
    height: 100px;
    z-index: 95;
    perspective: 400px;
}

.kb-cube-scene {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kb-cube {
    width: 70px;
    height: 70px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
    transform: translateZ(-35px); /* Size / 2 */
}

.kb-cube-face {
    position: absolute;
    width: 70px;
    height: 70px;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-weight: 800;
    font-size: 9px;
    text-transform: uppercase;
    cursor: pointer;
    backface-visibility: visible;
    transition: all 0.3s;
}

.kb-cube-face:hover {
    background: rgba(99, 102, 241, 0.4);
    color: #fff;
    border-color: #6366f1;
    box-shadow: inset 0 0 15px rgba(99, 102, 241, 0.3);
}

/* Cubes placement */
.kb-cube-front  { transform: rotateY(  0deg) translateZ(35px); }
.kb-cube-back   { transform: rotateY(180deg) translateZ(35px); }
.kb-cube-right  { transform: rotateY( 90deg) translateZ(35px); }
.kb-cube-left   { transform: rotateY(-90deg) translateZ(35px); }
.kb-cube-top    { transform: rotateX( 90deg) translateZ(35px); }
.kb-cube-bottom { transform: rotateX(-90deg) translateZ(35px); }

/* --- Loading Overlay Overhaul --- */
.kb-stl-loading {
    position: absolute;
    inset: 0;
    background: #020617;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 200;
    color: #6366f1;
    font-weight: 800;
    gap: 20px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 2px;
}

.kb-loader-circle {
    width: 40px;
    height: 40px;
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-top-color: #6366f1;
    border-radius: 50%;
    animation: kb-spin 1s linear infinite;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}

@keyframes kb-spin { to { transform: rotate(360deg); } }

/* MOBILE FIXES */
@media (max-width: 600px) {
    .kb-pro-3d-top {
        padding: 8px;
    }
    .kb-pro-3d-top-center { display: none; }
    
    .kb-pro-3d-btn b, .kb-pro-3d-btn span { display: none; }
    .kb-pro-3d-btn { padding: 8px; width: 34px; height: 34px; justify-content: center; }
    
    .kb-pro-3d-action, .kb-pro-3d-btn { font-size: 0; gap: 0; }
    
    .kb-pro-3d-cube-container { bottom: 60px; top: auto; right: 10px; transform: scale(0.7); }
    .kb-pro-3d-left { left: 8px; }
}

.kb-mobile-sticky-bar .sticky-cta {
    background: var(--kb-accent-gradient);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 12px;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(227, 30, 36, 0.3);
    transition: all 0.2s;
    white-space: nowrap;
}

.kb-mobile-sticky-bar .sticky-cta:hover {
    box-shadow: 0 6px 20px rgba(227, 30, 36, 0.45);
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .kb-mobile-sticky-bar {
        display: flex;
    }

    /* Push footer up so sticky bar doesn't cover content */
    .site-footer {
        padding-bottom: 80px !important;
    }
}
/* ==========================================================================
   THREAD MILL CALCULATOR PRO V4.0 - COMMAND CENTER UI (FINAL)
   ========================================================================== */

#kb-mill-calc.kb-calculator-container {
    --kb-bg: #020617;
    --kb-surface: #0f172a;
    --kb-accent: #6366f1;
    --kb-accent-glow: rgba(99, 102, 241, 0.4);
    --kb-success: #10b981;
    --kb-text: #ffffff;
    --kb-text-dim: #94a3b8;
    --kb-border: rgba(255, 255, 255, 0.1);
    
    background: var(--kb-bg) !important;
    color: var(--kb-text) !important;
    padding: 30px !important;
    border-radius: 20px !important;
    font-family: 'Plus Jakarta Sans', sans-serif !important;
    max-width: 1000px !important;
    margin: 30px auto !important;
    border: 1px solid var(--kb-border) !important;
    box-shadow: 0 40px 100px -20px rgba(0,0,0,0.9) !important;
    position: relative;
    overflow: hidden;
}

.kb-calculator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--kb-border);
    padding-bottom: 15px;
}

.kb-brand-banner { display: flex; align-items: center; gap: 12px; }
.kb-brand-tag { background: var(--kb-accent); color: #fff; font-size: 10px; font-weight: 800; padding: 4px 8px; border-radius: 4px; }
.kb-brand-name { font-size: 13px; font-weight: 800; color: var(--kb-text-dim); text-transform: uppercase; letter-spacing: 2px; }

.kb-sys-status { font-size: 9px; color: var(--kb-text-dim); display: flex; align-items: center; gap: 6px; font-weight: 700; }
.kb-status-light { width: 6px; height: 6px; background: var(--kb-success); border-radius: 50%; box-shadow: 0 0 10px var(--kb-success); }

.kb-calculator-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 25px;
    background: rgba(0,0,0,0.4);
    padding: 6px;
    border-radius: 12px;
}

.kb-tab-btn {
    background: transparent;
    border: none;
    padding: 10px 20px;
    font-size: 11px;
    font-weight: 700;
    color: var(--kb-text-dim);
    cursor: pointer;
    border-radius: 8px;
    flex: 1;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.kb-tab-btn.active {
    background: var(--kb-accent);
    color: #fff;
    box-shadow: 0 4px 15px var(--kb-accent-glow);
}

.kb-tab-content { display: none; }
.kb-tab-content.active { display: block; animation: kbFadeIn 0.4s ease forwards; }

@keyframes kbFadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.kb-calc-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 30px;
}

.kb-calc-inputs h3, .kb-calc-results h3 { 
    font-size: 10px; 
    text-transform: uppercase; 
    letter-spacing: 1.5px; 
    color: var(--kb-accent); 
    margin-bottom: 20px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}
.kb-calc-inputs h3::after, .kb-calc-results h3::after { content: ''; flex: 1; height: 1px; background: linear-gradient(90deg, var(--kb-border), transparent); }

.kb-input-group { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.kb-input-group label { font-size: 10px; font-weight: 800; color: var(--kb-text-dim); text-transform: uppercase; }
.kb-input-group input, .kb-input-group select { 
    background: #000; 
    border: 1px solid var(--kb-border); 
    color: #fff; 
    padding: 12px; 
    border-radius: 10px; 
    font-size: 13px; 
    font-weight: 600; 
    transition: 0.3s;
}
.kb-input-group input:focus { border-color: var(--kb-accent); box-shadow: 0 0 0 3px var(--kb-accent-glow); }
.kb-input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

/* Result Cards Overhaul */
.kb-result-card { 
    background: #070b14 !important; 
    border: 1px solid var(--kb-border) !important; 
    padding: 20px !important; 
    border-radius: 14px !important; 
    margin-bottom: 12px !important; 
    position: relative;
    overflow: hidden;
}
.kb-result-card.highlight { 
    border-color: var(--kb-accent) !important; 
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), #070b14) !important; 
}

.kb-res-label { font-size: 9px; font-weight: 800; color: var(--kb-accent); display: block; margin-bottom: 8px; letter-spacing: 1px; text-transform: uppercase; }
.kb-res-value { font-size: 32px; font-weight: 800; color: #fff !important; font-family: 'JetBrains Mono', monospace; line-height: 1; }
.kb-res-unit { font-size: 9px; color: var(--kb-text-dim); font-weight: 700; margin-left: 4px; text-transform: uppercase; }

.kb-result-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.kb-result-row .kb-result-card { margin-bottom: 0 !important; }
.kb-result-row .kb-res-value { font-size: 20px; }

.kb-scanner { position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: var(--kb-accent); animation: kb-calc-scan 4s linear infinite; opacity: 0.2; }
@keyframes kb-calc-scan { 0% { top: 0; } 100% { top: 100%; } }

/* Legend & SVG */
.kb-diag-box { background: #000; border-radius: 16px; padding: 25px; border: 1px solid var(--kb-border); }
.kb-diag-legend { display: flex; justify-content: center; gap: 20px; margin-top: 20px; flex-wrap: wrap; }
.diag-leg-item { display: flex; align-items: center; gap: 8px; font-size: 10px; font-weight: 800; color: var(--kb-text-dim); }

/* Footer */
.kb-calc-footer { 
    margin-top: 30px; 
    padding-top: 20px; 
    border-top: 1px solid var(--kb-border); 
    display: flex; 
    justify-content: space-between; 
    font-size: 10px; 
}
.kb-dev-credit a { transition: 0.3s; }
.kb-dev-credit a:hover { color: #fff !important; text-shadow: 0 0 10px var(--kb-accent); }

@media (max-width: 900px) {
    .kb-calc-grid { grid-template-columns: 1fr; }
    .kb-calc-results { order: -1; }
}