:root {
    /* Colors */
    --primary: #6B46C1;
    --primary-dark: #553C9A;
    --primary-light: #9F7AEA;
    --accent-pink: #FBB6CE;
    --accent-yellow: #FAF089;
    --text-main: #1A202C;
    --text-muted: #718096;
    --text-light: #F7FAFC;
    --bg-body: #FFFFFF;
    --bg-light: #F7FAFC;
    --bg-surface: #FFFFFF;
    --border-color: #E2E8F0;
    --success: #48BB78;
    --danger: #F56565;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #6B46C1 0%, #9F7AEA 100%);
    --gradient-soft: linear-gradient(135deg, #FFF5F7 0%, #FFFAF0 100%);

    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 4rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.my-lg { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-xl { margin-top: var(--spacing-xl); margin-bottom: var(--spacing-xl); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.hidden-mobile { display: none; }
@media (min-width: 768px) {
    .hidden-mobile { display: block; }
    .hidden-desktop { display: none; }
}

/* Typography Utilities */
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 2rem; }
.text-4xl { font-size: 2.5rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: var(--font-heading);
    font-size: 0.95rem;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: white;
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover {
    color: var(--primary);
    background-color: var(--bg-light);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

/* Header & Nav */
.top-bar {
    background-color: var(--bg-light);
    padding: var(--spacing-xs) 0;
    font-size: var(--text-xs);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    background-color: var(--bg-surface);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

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

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

.nav-icons {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.badge {
    background-color: var(--primary);
    color: white;
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-full);
    position: absolute;
    top: -5px;
    right: -5px;
}

.icon-btn {
    position: relative;
    font-size: 1.25rem;
    color: var(--text-main);
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: var(--spacing-xxl) 0;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

/* Cards */
.card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.card-img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    margin-bottom: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.category-card {
    text-align: center;
    cursor: pointer;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
}

.category-card.active {
    border-color: var(--primary);
    background-color: #F3EFFF;
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

/* Product Layout Page Structure */
.product-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .product-layout {
        grid-template-columns: 250px 1fr;
    }
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 640px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .product-grid { grid-template-columns: repeat(4, 1fr); }
}

.price {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.original-price {
    text-decoration: line-through;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-left: var(--spacing-sm);
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.filter-group {
    margin-bottom: var(--spacing-lg);
}

.filter-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    cursor: pointer;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-muted);
}

.checkbox-label:hover {
    color: var(--primary);
}

/* Product Detail */
.product-gallery {
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.thumbnails {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: center;
}

.thumb {
    width: 80px;
    height: 80px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    object-fit: cover;
}

.thumb.active {
    border-color: var(--primary);
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.tab {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    font-weight: 500;
    color: var(--text-muted);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

/* Footer */
.footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-grid { grid-template-columns: repeat(4, 1fr); }
}

.footer-heading {
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-link {
    display: block;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.footer-link:hover {
    color: var(--primary);
}

/* Mobile Nav Overlay */
.mobile-menu-btn {
    display: block;
    font-size: 1.5rem;
    cursor: pointer;
}
@media (min-width: 768px) {
    .mobile-menu-btn { display: none; }
}

/* Cart Specific */
.cart-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.cart-item-img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

/* Breadcrumbs */
.breadcrumbs {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
}

.breadcrumbs span {
    margin: 0 var(--spacing-xs);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}