/* ==========================================================================
   CSS Variables & Theme System
   ========================================================================== */
   :root {
    /* Base Font sizes and Spacing */
    --font-inter: 'Inter', sans-serif;
    --font-poppins: 'Poppins', sans-serif;
    
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --container-max: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --nav-height: 80px;

    /* Light Theme (Clean SaaS) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;

    --accent-primary: #3b82f6;      /* Blue */
    --accent-secondary: #06b6d4;    /* Cyan */
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.3);
    
    --border-color: rgba(15, 23, 42, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.4);
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

body.dark-theme {
    /* Dark Theme (Premium Tech / Apple / Stripe) */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #14141a;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(10, 10, 10, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    
    --accent-glow: rgba(6, 182, 212, 0.25);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-inter);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
    position: relative;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-poppins);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   Utility Classes & Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-2xl) 0;
    position: relative;
    z-index: 1;
}

.alt-bg {
    background-color: var(--bg-secondary);
}

.mt-nav {
    margin-top: var(--nav-height);
}

.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.w-100 { width: 100%; }
.inline-flex { display: inline-flex; }
.text-center { text-align: center; }

/* Grids */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

/* Gradients & Glows */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-effect {
    box-shadow: 0 0 40px var(--accent-glow);
}

/* Glassmorphism */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Background Shapes */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    opacity: 0.5;
    pointer-events: none;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -100px;
    left: -200px;
    opacity: 0.15;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: 20%;
    right: -150px;
    opacity: 0.1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-inter);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #ffffff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.05);
}

.btn-whatsapp {
    background: #25D366;
    color: #fff;
}

.btn-whatsapp:hover {
    background: #128C7E;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.icon-btn:hover {
    background: var(--bg-tertiary);
}

/* Section Headers */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-poppins);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-primary);
}

.dot {
    color: var(--accent-secondary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-menu-btn {
    display: none;
}

.hidden {
    display: none !important;
}

/* Mobile Menu overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--bg-primary);
    z-index: 1001;
    transition: right var(--transition-normal);
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
}

.mobile-menu.open {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: var(--space-xl);
}

.mobile-link {
    font-size: 1.25rem;
    font-family: var(--font-poppins);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    overflow: hidden;
}

.badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.image-wrapper {
    position: relative;
    padding: 1rem;
    background: var(--glass-bg);
}

.rounded-image {
    border-radius: var(--border-radius-md);
    width: 100%;
    box-shadow: inset 0 0 0 1px var(--glass-border);
}

/* ==========================================================================
   About System
   ========================================================================== */
.about-card {
    padding: var(--space-lg);
    text-align: left;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Products
   ========================================================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.product-card {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.product-img {
    height: 200px;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-img img {
    transform: scale(1.05);
}

.product-info {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.product-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.price-tag {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 0.4rem 0.85rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    align-self: flex-start;
    opacity: 0;
    animation: priceSlideUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes priceSlideUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: var(--space-xl);
    /* Allow horizontal scroll on very small screens */
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.25rem;
}
.category-filters::-webkit-scrollbar { display: none; }

.filter-btn {
    padding: 0.5rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-family: var(--font-inter);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap; /* Keep pill labels on one line */
    flex-shrink: 0;
}

.filter-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.filter-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

/* Product image container must be relative for overlays */
.product-img {
    position: relative;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: var(--space-xl);
}

.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.page-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.05);
}

.page-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.fade-in {
    animation: fadeIn 0.4s ease-in-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Students Section
   ========================================================================== */
.feature-list {
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.feature-list i {
    color: var(--accent-primary);
    font-size: 1.5rem;
}

/* ==========================================================================
   Forms (Distributors & Order)
   ========================================================================== */
.form-layout {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-inter);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.distributors-wrapper, .order-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: var(--space-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
}

.order-success-hidden {
    display: none;
}

.success-icon {
    width: 60px;
    height: 60px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1rem;
}

.highlight-id {
    font-family: monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-primary);
    letter-spacing: 1px;
}

/* ==========================================================================
   Payment Section
   ========================================================================== */
.payment-instructions {
    padding: var(--space-lg);
}

.step-list {
    margin: 1.5rem 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
}

.step-list li {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.step-list li span {
    position: absolute;
    left: 0;
    top: -2px;
    width: 2rem;
    height: 2rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.invoice-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: var(--space-md);
    border-radius: var(--border-radius-sm);
}

.invoice-card h4 {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.invoice-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.invoice-row.total {
    margin-top: 1rem;
    padding-top: 0.5rem;
    border-top: 1px dashed var(--border-color);
    font-size: 1rem;
}

.pending-status {
    color: var(--warning);
}

.method-card {
    padding: var(--space-md);
}

.method-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.method-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.copy-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.payment-number {
    font-family: monospace;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 1px;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-card {
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
    width: 40px;
    height: 40px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-card h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background: var(--bg-tertiary);
    padding: var(--space-xl) 0 var(--space-md);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-xl);
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 36px;
    height: 36px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.social-icon:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.link-group h4 {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.link-group ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.link-group a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.link-group a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-md);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(120%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast i {
    font-size: 1.25rem;
    color: var(--success);
}

/* ==========================================================================
   🛒 Flying Cart Animation
   ========================================================================== */

/* Cart icon bump animation — triggers when an item lands */
@keyframes cartBump {
    0%   { transform: scale(1); }
    30%  { transform: scale(1.45) rotate(-8deg); }
    55%  { transform: scale(1.2)  rotate(6deg); }
    75%  { transform: scale(1.3)  rotate(-4deg); }
    100% { transform: scale(1)   rotate(0deg); }
}

.cart-bump {
    animation: cartBump 0.5s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* Cart badge pulse when item is added */
@keyframes badgePop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.6); background: var(--accent-secondary); }
    100% { transform: scale(1); }
}

#cart-count {
    transition: background 0.3s;
}

#cart-count.pop {
    animation: badgePop 0.4s ease forwards;
}

/* ==========================================================================
   Animations & Scroll Reveal
   ========================================================================== */
.reveal-up {
    transform: translateY(40px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left {
    transform: translateX(-40px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right {
    transform: translateX(40px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-up.active,
.reveal-left.active,
.reveal-right.active {
    transform: translate(0);
    opacity: 1;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .grid-2-col {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .toast-container {
        right: 1rem;
        left: 1rem;
        bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* ==========================================================================
   Shopping Cart UI
   ========================================================================== */
.cart-btn { position: relative; }
.cart-badge {
    position: absolute;
    top: -5px; right: -5px;
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    width: 18px; height: 18px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-poppins);
}

.cart-drawer {
    position: fixed;
    top: 0;
    right: -400px;
    width: 100%;
    max-width: 380px;
    height: 100vh;
    background: var(--bg-primary);
    z-index: 1002;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.cart-drawer.open { right: 0; }
html[dir="rtl"] .cart-drawer { right: auto; left: -400px; }
html[dir="rtl"] .cart-drawer.open { left: 0; }

.cart-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1001;
    display: none;
}
.cart-overlay.show { display: block; }

.cart-header { padding: var(--space-md); border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.cart-header h3 { display: flex; align-items: center; gap: 0.5rem; }
.cart-body { padding: var(--space-md); flex-grow: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 1rem; }
.cart-footer { padding: var(--space-md); border-top: 1px solid var(--border-color); }
.cart-total { display: flex; justify-content: space-between; margin-bottom: 1rem; font-size: 1.25rem; font-weight: 600; }

.cart-item { display: flex; gap: 1rem; align-items: center; background: var(--bg-secondary); padding: 0.5rem; border-radius: var(--border-radius-sm); border: 1px solid var(--border-color); }
.cart-item img { width: 60px; height: 60px; object-fit: cover; border-radius: var(--border-radius-sm); }
.cart-item-info { flex-grow: 1; }
.cart-item-title { font-size: 0.875rem; font-weight: 600; margin-bottom:0.25rem; }
.cart-item-price { color: var(--accent-primary); font-weight: 500; font-size: 0.875rem; }
.cart-item-remove { color: var(--error); cursor: pointer; display:flex; align-items:center; justify-content:center; width:30px; height:30px; border-radius:50%; background:var(--bg-tertiary); transition:var(--transition-fast);}
.cart-item-remove:hover { background:var(--error); color:white; }

.empty-cart { text-align: center; color: var(--text-tertiary); margin-top: 2rem; font-size: 0.875rem; }

/* ==========================================================================
   RTL Styles
   ========================================================================== */
html[dir="rtl"] { text-align: right; }
html[dir="rtl"] .nav-links { flex-direction: row-reverse; }
html[dir="rtl"] .hero-title, html[dir="rtl"] .section-title { letter-spacing: normal; }
html[dir="rtl"] .social-links { flex-direction: row-reverse; }
html[dir="rtl"] .logo { flex-direction: row; }
html[dir="rtl"] .invoice-row { flex-direction: row-reverse; }

/* ==========================================================================
   Utility — Loader Spin + Spacing
   ========================================================================== */
@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.mb-4 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* ==========================================================================
   Premium Experience Additions (Apple/Linear Style)
   ========================================================================== */

/* Custom Cursor Styling */
@media (hover: hover) and (pointer: fine) {
    body, a, button, input, select, textarea, .product-card, .nav-link, .icon-btn {
        cursor: none !important;
    }
}

.cursor-dot, .cursor-outline {
    position: fixed;
    top: 0; left: 0;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: 10000;
    pointer-events: none;
    transition: opacity 0.2s;
}
html[dir="rtl"] .cursor-dot, html[dir="rtl"] .cursor-outline {
    transform: translate(50%, -50%);
}
.cursor-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-primary);
    transition: width 0.2s, height 0.2s, background-color 0.2s;
}
.cursor-outline {
    width: 34px;
    height: 34px;
    border: 1.5px solid var(--accent-primary);
    opacity: 0.5;
    transition: transform 0.1s cubic-bezier(0.2, 1, 0.2, 1), width 0.2s, height 0.2s, background-color 0.2s, border-color 0.2s;
}
.cursor-hover .cursor-dot { 
    width: 4px; height: 4px; 
}
.cursor-hover .cursor-outline {
    width: 54px;
    height: 54px;
    background-color: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.4);
}

/* Premium Loader */
#premium-loader {
    position: fixed;
    inset: 0;
    z-index: 10001;
    background-color: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s cubic-bezier(0.8, 0, 0.2, 1), transform 0.8s cubic-bezier(0.8, 0, 0.2, 1);
}
#premium-loader.loaded {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.02);
}
.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    animation: loaderPulse 2s infinite ease-in-out;
}
.loader-content .logo-icon {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.loader-content .logo-text {
    font-family: var(--font-poppins);
    font-weight: 700;
    font-size: 1.75rem;
    letter-spacing: 2px;
}
@keyframes loaderPulse {
    0%, 100% { opacity: 0.6; filter: blur(1px); transform: scale(0.96); }
    50% { opacity: 1; filter: blur(0px); transform: scale(1); }
}

/* Lenis Smooth Scroll Recommended */
html.lenis { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-stopped { overflow: hidden; }

/* 3D Product Cards & Depth */
.product-card {
    transition: transform 0.15s ease-out, box-shadow 0.3s ease;
    transform-style: preserve-3d;
    position: relative;
    will-change: transform;
    cursor: pointer; /* fallback if custom cursor fails */
}
/* Glowing Border Tracking Mouse */
.product-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: calc(var(--border-radius-md) + 2px);
    background: radial-gradient(800px circle at var(--mx, 50%) var(--my, 50%), rgba(59, 130, 246, 0.8), rgba(168, 85, 247, 0.5), transparent 40%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
/* Inner Light Reflection */
.product-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(800px circle at var(--rx, 50%) var(--ry, 50%), rgba(255,255,255,0.1), transparent 50%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 10;
}
.product-card:hover::before,
.product-card:hover::after { opacity: 1; }
.product-card:hover {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    z-index: 2;
}
.product-card .product-img {
    transform: translateZ(25px);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.product-card .product-info {
    transform: translateZ(10px);
}
.product-card:hover .product-img {
    transform: translateZ(40px) scale(1.02);
}

/* Buttons Micro-interactions */
.btn {
    position: relative;
    overflow: hidden;
}
.btn::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 0; height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease-out, height 0.5s ease-out, opacity 0.8s ease-out;
    opacity: 0;
    pointer-events: none;
}
.btn:active::after {
    width: 300px;
    height: 300px;
    opacity: 1;
    transition: 0s;
}

/* Parallax Depth Elements */
.parallax-el {
    will-change: transform;
}

/* ==========================================================================
   Product Detail Modal
   ========================================================================== */
.product-modal {
    position: fixed;
    inset: 0;
    z-index: 10005;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}
.product-modal.open {
    opacity: 1;
    pointer-events: auto;
}
.product-modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-xl);
    transform: translateY(30px) scale(0.95);
    transition: transform var(--transition-normal);
    opacity: 0;
}
.product-modal.open .product-modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}
.product-modal .close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}
.pm-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}
.pm-image img {
    width: 100%;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
}
.pm-category {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
}
.pm-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}
.pm-desc {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 2rem;
}
.pm-price {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}
@media (max-width: 768px) {
    .pm-grid { grid-template-columns: 1fr; gap: var(--space-md); }
    .pm-title { font-size: 2rem; }
}

/* ==========================================================================
   UI/UX Refinements (Mobile Grid & Animations)
   ========================================================================== */
@media (max-width: 768px) {
  .product-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: var(--space-md) !important;
  }
}

.product-card {
  opacity: 0;
  transform: translateY(30px) scale(0.98);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
  position: relative;
}

.product-card.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.product-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 0) 60%, rgba(255, 255, 255, 0.4));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  background-size: 200% 200%;
  animation: shimmerBorder 4s ease-in-out infinite;
  opacity: 0.5;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.product-card:hover::after {
  opacity: 1;
}

@keyframes shimmerBorder {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ==========================================================================
   Back Glow / Aura Effect
   ========================================================================== */
.card, .product-card, .glass-card {
  position: relative;
  isolation: isolate;
}

.card::before, .product-card::before, .glass-card::before {
  content: "";
  position: absolute;
  inset: -8px;
  background: radial-gradient(
    800px circle at var(--x, 50%) var(--y, 50%),
    rgba(6, 182, 212, 0.25),
    rgba(59, 130, 246, 0.1) 30%,
    transparent 60%
  );
  filter: blur(16px);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
  pointer-events: none;
  border-radius: inherit;
}

.card:hover::before, .product-card:hover::before, .glass-card:hover::before {
  opacity: 1;
}