/* ============================================================================
   MK Universal Catalog Pro V1
   Theme: 03 - Electronics
   File: themes/theme03/assets/css/style.css
   Purpose: Complete design system for this theme. Same shared class
            structure as every theme, but a dark, high-contrast tech
            identity: near-black backgrounds, neon cyan accents, angular
            (not rounded) cards, and glow effects on interactive elements.
   ============================================================================ */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500&display=swap');

/* ----------------------------------------------------------------------------
   1. DESIGN TOKENS
   ---------------------------------------------------------------------------- */
:root {
    --color-bg: #0b0e14;
    --color-bg-alt: #12161f;
    --color-text: #e7ecf3;
    --color-text-muted: #8b93a7;
    --color-accent: #00d9ff;
    --color-accent-hover: #33e2ff;
    --color-border: #232a38;
    --color-success: #2dd4a7;
    --color-danger: #ff5470;
    --color-white: #ffffff;
    --color-card: #131824;

    --font-family: 'Inter', -apple-system, sans-serif;
    --font-display: 'Space Grotesk', -apple-system, sans-serif;
    --fs-xs: 0.75rem; --fs-sm: 0.9rem; --fs-base: 1rem;
    --fs-lg: 1.2rem; --fs-xl: 1.75rem; --fs-2xl: 2.4rem; --fs-3xl: 3.25rem;

    --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 1rem;
    --space-4: 1.5rem; --space-5: 2rem; --space-6: 3.5rem; --space-7: 5.5rem;

    --radius-sm: 4px; --radius-md: 6px; --radius-lg: 8px;
    --shadow-sm: 0 2px 12px rgba(0,0,0,0.4);
    --shadow-md: 0 10px 34px rgba(0,0,0,0.5);
    --shadow-lg: 0 24px 64px rgba(0,0,0,0.6);
    --glow: 0 0 0 1px rgba(0,217,255,0.25), 0 0 24px rgba(0,217,255,0.15);

    --max-width: 1240px;
    --header-height: 68px;
    --transition-fast: 0.18s ease;
    --transition-base: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ----------------------------------------------------------------------------
   2. RESET & BASE
   ---------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-family);
    font-size: var(--fs-base);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: var(--fs-base); }

h1, h2, h3, h4 { margin: 0 0 var(--space-3); font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 var(--space-3); color: var(--color-text-muted); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-4); }
.section { padding: var(--space-7) 0; }
.section-title { text-align: center; font-size: var(--fs-2xl); margin-bottom: var(--space-6); }
.section-title::after { content: ''; display: block; width: 40px; height: 3px; background: var(--color-accent); margin: var(--space-3) auto 0; box-shadow: var(--glow); }
.text-center { text-align: center; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ----------------------------------------------------------------------------
   3. BUTTONS - angular, glowing on hover
   ---------------------------------------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
    padding: 0.8rem 1.75rem; border-radius: var(--radius-sm);
    font-size: var(--fs-sm); font-weight: 600;
    border: 1px solid transparent;
    transition: background var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.btn-primary { background: var(--color-accent); color: #04121a; }
.btn-primary:hover { background: var(--color-accent-hover); box-shadow: var(--glow); }
.btn-secondary { background: var(--color-card); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { border-color: var(--color-accent); }
.btn-outline { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-whatsapp { background: #25d366; color: #04121a; }
.btn-whatsapp:hover { background: #20bd5a; }
.btn-block { width: 100%; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8em; }
.btn:active { transform: scale(0.98); }

/* ----------------------------------------------------------------------------
   4. HEADER / NAVIGATION - dark bar, glowing active states
   ---------------------------------------------------------------------------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    height: var(--header-height);
    display: flex; align-items: center;
    background: rgba(11,14,20,0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.site-logo { font-family: var(--font-display); font-size: var(--fs-lg); font-weight: 700; }
.site-logo::before { content: '◆ '; color: var(--color-accent); }
.main-nav { display: none; }
.main-nav ul { display: flex; gap: var(--space-5); }
.main-nav a { font-size: var(--fs-sm); color: var(--color-text-muted); transition: color var(--transition-fast); }
.main-nav a:hover { color: var(--color-accent); }
.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: var(--radius-sm);
    background: var(--color-card); border: 1px solid var(--color-border); color: var(--color-text);
    transition: border-color var(--transition-fast);
}
.icon-btn:hover { border-color: var(--color-accent); }
.mobile-menu-toggle { display: inline-flex; }

.mobile-nav {
    position: fixed; inset: 0; z-index: 200;
    background: var(--color-bg);
    display: flex; flex-direction: column; padding: var(--space-5);
    transform: translateX(100%);
    transition: transform var(--transition-base);
}
.mobile-nav.is-open { transform: translateX(0); }
.mobile-nav ul { display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-6); }
.mobile-nav a { font-family: var(--font-display); font-size: var(--fs-xl); }
.mobile-nav-close { align-self: flex-end; }

/* ----------------------------------------------------------------------------
   5. HERO / BANNER SLIDER
   ---------------------------------------------------------------------------- */
.hero-slider { position: relative; overflow: hidden; }
.hero-slide {
    display: none; position: relative; min-height: 62vh;
    align-items: center; justify-content: center; text-align: center;
    background-size: cover; background-position: center;
    background-color: var(--color-bg-alt);
    padding: var(--space-6) var(--space-4);
}
.hero-slide.is-active { display: flex; }
.hero-slide-content { max-width: 640px; }
.hero-slide-content h2 { font-size: var(--fs-3xl); margin-bottom: var(--space-3); }
.hero-slide-content p { font-size: var(--fs-lg); color: var(--color-text-muted); margin-bottom: var(--space-4); }
.hero-dots { position: absolute; bottom: var(--space-4); left: 50%; transform: translateX(-50%); display: flex; gap: var(--space-2); }
.hero-dot { width: 8px; height: 8px; border-radius: 2px; background: rgba(255,255,255,0.15); border: none; padding: 0; }
.hero-dot.is-active { background: var(--color-accent); box-shadow: var(--glow); }

/* ----------------------------------------------------------------------------
   6. CATEGORY / BRAND GRIDS
   ---------------------------------------------------------------------------- */
.grid { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.category-card, .brand-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-5) var(--space-4);
    text-align: center;
    transition: border-color var(--transition-base), transform var(--transition-base);
}
.category-card:hover, .brand-card:hover { border-color: var(--color-accent); transform: translateY(-3px); }
.category-card img, .brand-card img {
    width: 60px; height: 60px; margin: 0 auto var(--space-3);
    border-radius: var(--radius-sm); object-fit: cover; background: var(--color-bg-alt);
}
.category-card h3, .brand-card h3 { font-size: var(--fs-sm); margin: 0; }

/* ----------------------------------------------------------------------------
   7. PRODUCT CARDS
   ---------------------------------------------------------------------------- */
.product-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex; flex-direction: column;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.product-card:hover { border-color: var(--color-accent); box-shadow: var(--glow); }
.product-card-image {
    aspect-ratio: 1 / 1; background: var(--color-bg-alt);
    display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative;
}
.product-card-image img { width: 100%; height: 100%; object-fit: cover; }
.product-badge {
    position: absolute; top: var(--space-3); left: var(--space-3);
    background: var(--color-accent); color: #04121a;
    font-size: var(--fs-xs); font-weight: 700;
    padding: 0.25rem 0.6rem; border-radius: var(--radius-sm);
}
.product-card-body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.product-card-category { font-size: var(--fs-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.product-card-title { font-family: var(--font-display); font-size: var(--fs-base); font-weight: 600; margin: 0; }
.price-row { display: flex; align-items: baseline; gap: var(--space-2); margin-top: auto; }
.price-current { font-size: var(--fs-lg); font-weight: 700; color: var(--color-accent); }
.price-original { font-size: var(--fs-sm); color: var(--color-text-muted); text-decoration: line-through; }

/* ----------------------------------------------------------------------------
   8. PRODUCT DETAIL PAGE
   ---------------------------------------------------------------------------- */
.product-detail { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
.product-gallery-main {
    aspect-ratio: 1 / 1; border-radius: var(--radius-lg); overflow: hidden;
    background: var(--color-bg-alt); margin-bottom: var(--space-3);
    border: 1px solid var(--color-border);
}
.product-gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.product-gallery-thumbs { display: flex; gap: var(--space-2); overflow-x: auto; }
.product-gallery-thumbs img {
    width: 72px; height: 72px; object-fit: cover; border-radius: var(--radius-sm);
    cursor: pointer; border: 1px solid var(--color-border);
}
.product-gallery-thumbs img.is-active { border-color: var(--color-accent); box-shadow: var(--glow); }

.product-info-title { font-size: var(--fs-2xl); }
.product-info-meta { display: flex; gap: var(--space-3); font-size: var(--fs-sm); color: var(--color-text-muted); margin-bottom: var(--space-4); }
.product-info-price { font-size: var(--fs-2xl); font-family: var(--font-display); font-weight: 700; color: var(--color-accent); margin-bottom: var(--space-4); }
.product-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-5); }

.spec-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.spec-table tr { border-bottom: 1px solid var(--color-border); }
.spec-table td { padding: var(--space-3) 0; }
.spec-table td:first-child { color: var(--color-text-muted); width: 40%; }

.share-links { display: flex; gap: var(--space-2); }

/* ----------------------------------------------------------------------------
   9. GLASS CARD -> reinterpreted as a dark bordered tech panel with glow
   ---------------------------------------------------------------------------- */
.glass-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* ----------------------------------------------------------------------------
   10. FORMS
   ---------------------------------------------------------------------------- */
.form-group { margin-bottom: var(--space-4); }
.form-label { display: block; font-size: var(--fs-sm); font-weight: 500; margin-bottom: var(--space-2); }
.form-control {
    width: 100%; padding: 0.75rem 1rem;
    border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    background: var(--color-bg-alt); color: var(--color-text);
    transition: border-color var(--transition-fast);
}
.form-control:focus { outline: none; border-color: var(--color-accent); box-shadow: var(--glow); }
.search-bar { position: relative; max-width: 480px; margin: 0 auto; }
.search-bar input { padding-right: 3rem; }
.search-bar button { position: absolute; right: 4px; top: 4px; bottom: 4px; width: 40px; border: none; background: var(--color-accent); color: #04121a; border-radius: var(--radius-sm); }

/* ----------------------------------------------------------------------------
   11. FOOTER
   ---------------------------------------------------------------------------- */
.site-footer { background: var(--color-bg-alt); padding: var(--space-6) 0 var(--space-4); margin-top: var(--space-7); border-top: 1px solid var(--color-border); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); margin-bottom: var(--space-5); }
.footer-col h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col a { display: block; font-size: var(--fs-sm); color: var(--color-text-muted); padding: var(--space-1) 0; }
.footer-col a:hover { color: var(--color-accent); }
.footer-social { display: flex; gap: var(--space-3); margin-top: var(--space-3); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: var(--space-4); text-align: center; font-size: var(--fs-xs); color: var(--color-text-muted); }

.whatsapp-float {
    position: fixed; bottom: var(--space-4); right: var(--space-4);
    width: 56px; height: 56px; border-radius: var(--radius-lg);
    background: #25d366; color: #04121a;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-lg); z-index: 90;
    transition: transform var(--transition-fast);
}
.whatsapp-float:hover { transform: scale(1.08); }

/* ----------------------------------------------------------------------------
   12. PAGINATION
   ---------------------------------------------------------------------------- */
.pagination { display: flex; justify-content: center; gap: var(--space-2); margin-top: var(--space-6); flex-wrap: wrap; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 38px; height: 38px; border-radius: var(--radius-sm); font-size: var(--fs-sm);
    background: var(--color-card); border: 1px solid var(--color-border);
}
.pagination a:hover { border-color: var(--color-accent); }
.pagination .is-current { background: var(--color-accent); color: #04121a; border-color: var(--color-accent); }

/* ----------------------------------------------------------------------------
   13. FILTER SIDEBAR
   ---------------------------------------------------------------------------- */
.filter-sidebar { margin-bottom: var(--space-5); }
.filter-group { margin-bottom: var(--space-4); }
.filter-group h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-2); }
.filter-group a { display: block; font-size: var(--fs-sm); color: var(--color-text-muted); padding: var(--space-1) 0; }
.filter-group a.is-active, .filter-group a:hover { color: var(--color-accent); }
.listing-layout { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }

/* ----------------------------------------------------------------------------
   13b. CART PAGE
   ---------------------------------------------------------------------------- */
.cart-line-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}
.cart-line-item-image { width: 64px; height: 64px; object-fit: cover; border-radius: var(--radius-sm); background: var(--color-bg-alt); flex-shrink: 0; }
.cart-line-item-details { flex: 1; min-width: 140px; }
.cart-line-item-name { font-weight: 600; }
.cart-line-item-price { font-size: var(--fs-sm); color: var(--color-text-muted); }
.cart-line-item-qty { text-align: center; }
.cart-line-item-subtotal { font-weight: 700; min-width: 80px; text-align: right; }
.cart-summary { display: flex; align-items: center; justify-content: space-between; padding: var(--space-4) 0; margin-top: var(--space-3); border-top: 2px solid var(--color-border); }
.cart-summary-total { font-size: var(--fs-xl); font-weight: 700; }
.cart-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-4); }

/* ----------------------------------------------------------------------------
   13c. SIZE / COLOR VARIANT PICKERS (product detail page)
   ---------------------------------------------------------------------------- */
.cart-line-item-variant { font-size: var(--fs-xs); color: var(--color-text-muted); margin: 2px 0; }

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

.size-option {
    min-width: 44px;
    padding: 0.5rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white, #fff);
    color: var(--color-text);
    font-size: var(--fs-sm);
    font-weight: 500;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.size-option:hover { border-color: var(--color-accent); }
.size-option.is-selected { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }

.color-option {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    background: var(--color-bg-alt);
    cursor: pointer;
    padding: 0;
    transition: border-color 0.2s ease, transform 0.2s ease;
}
.color-option:hover { transform: scale(1.08); }
.color-option.is-selected { border-color: var(--color-accent); box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 3px var(--color-accent); }
.color-option-text {
    width: auto;
    height: auto;
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.8rem;
    font-size: var(--fs-xs);
    color: var(--color-text);
}

/* ----------------------------------------------------------------------------
   13d. CUSTOMER CONTACT MODAL (shown before an order goes to WhatsApp)
   ---------------------------------------------------------------------------- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 300;
    padding: var(--space-4);
}
.modal-overlay.is-visible { display: flex; }
.modal-box {
    background: var(--color-white, #fff);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    max-width: 420px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}
.modal-box h3 { margin-bottom: var(--space-2); }
.modal-actions { display: flex; gap: var(--space-3); margin-top: var(--space-4); }

/* ----------------------------------------------------------------------------
   14. EMPTY STATES & 404
   ---------------------------------------------------------------------------- */
.empty-state { text-align: center; padding: var(--space-7) var(--space-4); }
.empty-state h2 { font-size: var(--fs-xl); }

/* ----------------------------------------------------------------------------
   15. RESPONSIVE BREAKPOINTS (mobile-first)
   ---------------------------------------------------------------------------- */
@media (min-width: 640px) {
    .grid-sm-2 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
    .main-nav { display: block; }
    .mobile-menu-toggle { display: none; }
    .grid-md-3 { grid-template-columns: repeat(3, 1fr); }
    .product-detail { grid-template-columns: 1fr 1fr; }
    .listing-layout { grid-template-columns: 240px 1fr; }
}
@media (min-width: 1024px) {
    .grid-lg-4 { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}