:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #93C5FD;
    --secondary: #10B981;
    --secondary-dark: #059669;
    --accent: #F59E0B;
    --accent-dark: #D97706;
    --danger: #EF4444;
    --dark: #1E293B;
    --gray-900: #0F172A;
    --gray-800: #1E293B;
    --gray-700: #334155;
    --gray-600: #475569;
    --gray-500: #64748B;
    --gray-400: #94A3B8;
    --gray-300: #CBD5E1;
    --gray-200: #E2E8F0;
    --gray-100: #F1F5F9;
    --gray-50: #F8FAFC;
    --white: #FFFFFF;
    --success: #10B981;
    --warning: #F59E0B;
    --info: #3B82F6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--gray-800);
    background: var(--gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--gray-900); }
h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
p { margin-bottom: 1rem; color: var(--gray-600); }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-dark); }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.container-sm { max-width: 640px; margin: 0 auto; padding: 0 1rem; }
.container-md { max-width: 768px; margin: 0 auto; padding: 0 1rem; }
.container-lg { max-width: 1024px; margin: 0 auto; padding: 0 1rem; }

/* Navbar */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}
.navbar-brand img { height: 36px; }
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}
.navbar-nav a {
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}
.navbar-nav a:hover,
.navbar-nav a.active { color: var(--primary); }
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.cart-badge {
    position: relative;
}
.cart-badge .badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger);
    color: var(--white);
    font-size: 0.6875rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-700);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.5;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); color: var(--white); }
.btn-secondary { background: var(--secondary); color: var(--white); }
.btn-secondary:hover { background: var(--secondary-dark); color: var(--white); }
.btn-accent { background: var(--accent); color: var(--white); }
.btn-accent:hover { background: var(--accent-dark); color: var(--white); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #DC2626; color: var(--white); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-lg { padding: 0.875rem 1.75rem; font-size: 1.0625rem; }
.btn-block { display: flex; width: 100%; }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
    color: var(--white);
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { color: var(--white); font-size: 2.75rem; margin-bottom: 1rem; }
.hero p { color: rgba(255,255,255,0.9); font-size: 1.125rem; max-width: 600px; }
.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 2rem;
}
.hero-stat { text-align: center; }
.hero-stat .number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.hero-stat .label { font-size: 0.875rem; color: rgba(255,255,255,0.8); }
.hero-cta { display: flex; gap: 1rem; margin-top: 2rem; }

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--gray-100);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.card-img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    background: var(--gray-100);
}
.card-body { padding: 1rem 1.25rem; }
.card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.375rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
}
.card-price {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.price-current {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--primary);
}
.price-old {
    font-size: 0.875rem;
    color: var(--gray-400);
    text-decoration: line-through;
}
.discount-badge {
    background: var(--danger);
    color: var(--white);
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
}

/* Grid */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Section */
.section { padding: 3.5rem 0; }
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}
.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-title .icon {
    font-size: 1.5rem;
}

/* Categories */
.category-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    border: 2px solid var(--gray-100);
    transition: all 0.3s;
    text-decoration: none;
}
.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.category-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}
.category-name {
    font-weight: 700;
    color: var(--gray-800);
    font-size: 0.9375rem;
}

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray-700);
    margin-bottom: 0.375rem;
}
.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 100px; }

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.alert-success { background: #ECFDF5; color: #065F46; border: 1px solid #A7F3D0; }
.alert-error { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; }
.alert-warning { background: #FFFBEB; color: #92400E; border: 1px solid #FDE68A; }
.alert-info { background: #EFF6FF; color: #1E40AF; border: 1px solid #BFDBFE; }

/* Table */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--gray-200); }
.table th { font-weight: 600; font-size: 0.8125rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.05em; background: var(--gray-50); }
.table tr:hover { background: var(--gray-50); }

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}
.badge-success { background: #ECFDF5; color: #065F46; }
.badge-warning { background: #FFFBEB; color: #92400E; }
.badge-danger { background: #FEF2F2; color: #991B1B; }
.badge-info { background: #EFF6FF; color: #1E40AF; }

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 3rem 0 1.5rem;
    margin-top: 3rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}
.footer-brand { font-size: 1.5rem; font-weight: 800; color: var(--white); margin-bottom: 0.75rem; }
.footer-desc { font-size: 0.875rem; line-height: 1.7; }
.footer-title { color: var(--white); font-weight: 700; margin-bottom: 1rem; font-size: 1rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: var(--gray-400); font-size: 0.875rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--white); }
.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8125rem;
}

/* Product Detail */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; padding: 2rem 0; }
.product-image { border-radius: var(--radius-lg); overflow: hidden; }
.product-image img { width: 100%; height: auto; }
.product-info h1 { margin-bottom: 0.5rem; }
.product-meta { display: flex; gap: 1.5rem; margin: 1rem 0; font-size: 0.875rem; color: var(--gray-500); }
.product-price-box {
    background: var(--gray-50);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}
.product-price-large { font-size: 1.75rem; font-weight: 800; color: var(--primary); }
.product-actions { display: flex; gap: 0.75rem; margin-top: 1rem; }

/* Stars */
.stars { color: var(--accent); letter-spacing: 2px; }
.star-empty { color: var(--gray-300); }

/* Auth */
.auth-box {
    max-width: 420px;
    margin: 3rem auto;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}
.auth-box h2 { text-align: center; margin-bottom: 1.5rem; }
.auth-divider {
    text-align: center;
    color: var(--gray-400);
    font-size: 0.875rem;
    margin: 1rem 0;
}
.auth-link { text-align: center; font-size: 0.875rem; color: var(--gray-500); }

/* Checkout */
.checkout-summary {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    position: sticky;
    top: 5rem;
}
.checkout-item {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
}
.checkout-item-img { width: 60px; height: 80px; object-fit: cover; border-radius: var(--radius-sm); }
.checkout-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.25rem;
    font-weight: 800;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid var(--gray-200);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.375rem;
    margin-top: 2rem;
}
.pagination a, .pagination span {
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    color: var(--gray-600);
    transition: all 0.2s;
}
.pagination a:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* Rating */
.rating-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Search */
.search-box {
    display: flex;
    gap: 0.5rem;
    max-width: 500px;
}
.search-box .form-control { flex: 1; }

/* Admin */
.admin-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    min-height: 100vh;
}
.admin-sidebar {
    background: var(--gray-900);
    padding: 1.5rem;
    color: var(--gray-400);
}
.admin-sidebar .logo {
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-700);
}
.admin-menu { list-style: none; }
.admin-menu li { margin-bottom: 0.25rem; }
.admin-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius);
    color: var(--gray-400);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}
.admin-menu a:hover, .admin-menu a.active {
    background: var(--gray-800);
    color: var(--white);
}
.admin-content { padding: 1.5rem; background: var(--gray-50); }
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--gray-100);
}
.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
}
.stat-card .stat-label {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}
.stat-card .stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-400);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state p { margin-bottom: 1.5rem; }

/* Feature Icons */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.feature-card {
    text-align: center;
    padding: 1.5rem;
}
.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1rem;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}
.feature-title { font-weight: 700; color: var(--gray-800); margin-bottom: 0.375rem; }
.feature-desc { font-size: 0.875rem; color: var(--gray-500); }

/* Admin Sidebar */
.admin-body { display: flex; min-height: 100vh; background: var(--gray-50); }
.admin-sidebar {
    width: 260px;
    background: var(--gray-900);
    color: var(--gray-400);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    overflow-y: auto;
}
.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sidebar-logo {
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 800;
    text-decoration: none;
}
.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 1.5rem;
    cursor: pointer;
}
.sidebar-nav { flex: 1; padding: 1rem 0; display: flex; flex-direction: column; }
.sidebar-menu { list-style: none; padding: 0; margin: 0; flex: 1; }
.sidebar-menu li { margin-bottom: 0.125rem; }
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.2s;
}
.sidebar-link:hover { background: var(--gray-800); color: var(--white); }
.sidebar-link.active { background: var(--gray-800); color: var(--primary-light); border-right: 3px solid var(--primary); }
.sidebar-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--gray-800); }
.admin-wrapper { flex: 1; margin-left: 260px; display: flex; flex-direction: column; }
.admin-topbar {
    background: var(--white);
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}
.admin-sidebar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-600);
}
.admin-topbar-right { display: flex; align-items: center; gap: 1rem; }
.admin-user-name { font-weight: 600; font-size: 0.875rem; color: var(--gray-700); }
.admin-content { padding: 1.5rem; flex: 1; }

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-sidebar { transform: translateX(-100%); transition: transform 0.3s; }
    .admin-sidebar.active { transform: translateX(0); }
    .admin-wrapper { margin-left: 0; }
    .admin-sidebar-toggle { display: block; }
    .sidebar-close { display: block; }
}
@media (max-width: 768px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.75rem; }
    .hero-stats { gap: 1.5rem; }
    .hero-cta { flex-direction: column; }
    .product-detail { grid-template-columns: 1fr; gap: 1.5rem; }
    .navbar-nav { display: none; }
    .mobile-toggle { display: block; }
    .footer-grid { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .section-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
}
@media (max-width: 480px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .hero { padding: 2rem 0; }
    .hero .container { padding: 0 1rem; }
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.5s ease-out; }

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.text-sm { font-size: 0.875rem; }
.text-muted { color: var(--gray-500); }
.font-bold { font-weight: 700; }
.hidden { display: none; }

/* Bootstrap-compatible utilities */
.row { display: flex; flex-wrap: wrap; }
.col-lg-2 { width: 16.666%; }
.col-lg-3 { width: 25%; }
.col-lg-4 { width: 33.333%; }
.col-lg-5 { width: 41.666%; }
.col-lg-6 { width: 50%; }
.col-lg-7 { width: 58.333%; }
.col-lg-9 { width: 75%; }
.col-md-4 { width: 33.333%; }
.col-md-6 { width: 50%; }
.g-4, .g-5 { gap: 1.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }
.py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }
.px-4 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-5 { padding-left: 3rem; padding-right: 3rem; }
.ms-1 { margin-left: 0.5rem; }
.me-1 { margin-right: 0.5rem; }
.ms-auto { margin-left: auto; }
.me-auto { margin-right: auto; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-none { display: none; }
.flex-wrap { flex-wrap: wrap; }
.flex-column { flex-direction: column; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-self-center { align-self: center; }
.text-decoration-none { text-decoration: none; }
.text-decoration-line-through { text-decoration: line-through; }
.text-center { text-align: center; }
.text-primary { color: var(--primary) !important; }
.text-dark { color: var(--gray-800) !important; }
.text-warning { color: var(--accent) !important; }
.text-white { color: #fff !important; }
.text-muted { color: var(--gray-500) !important; }
.fw-bold { font-weight: 700; }
.fw-normal { font-weight: 400; }
.fs-1 { font-size: 2.5rem; }
.fs-2 { font-size: 2rem; }
.fs-3 { font-size: 1.5rem; }
.fs-5 { font-size: 1.125rem; }
.w-100 { width: 100%; }
.h-100 { height: 100%; }
.img-fluid { max-width: 100%; height: auto; }
.rounded { border-radius: var(--radius); }
.shadow { box-shadow: var(--shadow); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.border-0 { border: none; }
.border-top { border-top: 1px solid var(--gray-200); }
.border-bottom { border-bottom: 1px solid var(--gray-200); }
.bg-light { background: var(--gray-100); }
.bg-white { background: var(--white); }
.opacity-75 { opacity: 0.75; }
.sticky-top { position: sticky; top: 100px; z-index: 10; }
.list-unstyled { list-style: none; padding-left: 0; }
.input-group { display: flex; }
.input-group .form-control { flex: 1; }
.input-group .btn { flex-shrink: 0; }
.breadcrumb { display: flex; align-items: center; gap: 0.5rem; padding: 0; margin: 0; list-style: none; }
.breadcrumb-item { display: flex; align-items: center; gap: 0.5rem; }
.breadcrumb-item + .breadcrumb-item::before { content: '/'; color: var(--gray-400); }
.breadcrumb-item.active { color: var(--gray-500); }
.pagination { list-style: none; padding: 0; }
.pagination .page-item { display: inline-block; }
.pagination .page-link, .pagination .page-item.active span { display: inline-block; padding: 0.5rem 0.875rem; border-radius: var(--radius); font-size: 0.875rem; font-weight: 600; border: 1px solid var(--gray-200); color: var(--gray-600); transition: all 0.2s; text-decoration: none; }
.pagination .page-link:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .page-item.active .page-link { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .page-item.disabled .page-link { opacity: 0.5; pointer-events: none; }
.list-unstyled li { margin-bottom: 0.5rem; }
.input-group { gap: 0; }
.input-group .form-control { border-radius: var(--radius) 0 0 var(--radius); }
.input-group .btn { border-radius: 0 var(--radius) var(--radius) 0; }
.card-img-top { width: 100%; aspect-ratio: 3/4; object-fit: cover; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.mt-0 { margin-top: 0; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.p-4 { padding: 1.5rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }
.fs-3 { font-size: 1.5rem; }
.fw-bold { font-weight: 700; }
.mb-lg-0 { margin-bottom: 0; }
@media (max-width: 991px) {
    .row { flex-direction: column; }
    .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-9 { width: 100%; }
    .mb-lg-0 { margin-bottom: 1.5rem; }
    .d-lg-flex { display: flex; }
}
@media (min-width: 768px) {
    .col-md-4, .col-md-6 { flex: 0 0 auto; }
}
@media (max-width: 767px) {
    .col-md-4, .col-md-6 { width: 100%; }
}