:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #10b981;
    --text: #1f2937;
    --text-light: #6b7280;
    --bg: #f9fafb;
    --card-bg: #ffffff;
    --border: #e5e7eb;
    --radius: 12px;
    --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);
}

body {
    color: var(--text);
    background: var(--bg);
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.75rem;
    color: #111827;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.05em;
    line-height: 1;
}

.main-nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.main-nav a {
    color: #4b5563;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.main-nav a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 1.25rem;
    margin-left: 1.5rem;
    padding-left: 1.5rem;
    border-left: 1px solid #e5e7eb;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    text-decoration: none;
    letter-spacing: 0.025em;
    line-height: 1.5;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2), 0 2px 4px -1px rgba(79, 70, 229, 0.1);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid #6b7280;
    color: #1f2937;
    font-weight: 600;
}

.btn-outline:hover {
    background: #f3f4f6;
    border-color: #374151;
    color: #111827;
    transform: translateY(-1px);
}

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

/* Page Header */
.page-header {
    background: var(--card-bg);
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2.25rem;
    font-weight: 800;
    margin: 0 0 0.5rem 0;
    color: var(--text);
    letter-spacing: -0.025em;
}

.breadcrumbs {
    color: var(--text-light);
    font-size: 0.9rem;
}

.breadcrumbs a {
    color: var(--text-light);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--primary);
}

/* Layout & Grid */
.shop-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 768px) {
    .shop-layout {
        grid-template-columns: 1fr;
    }

    .shop-sidebar {
        display: none;
    }

    /* Hide filters on mobile for now */
}

/* Sidebar */
.shop-sidebar .sidebar-widget {
    margin-bottom: 2.5rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.sidebar-widget h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
}

.categories-widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.categories-widget li {
    margin-bottom: 0.5rem;
}

.categories-widget a {
    text-decoration: none;
    color: var(--text-light);
    transition: color 0.2s;
    display: block;
    padding: 0.25rem 0;
}

.categories-widget a:hover {
    color: var(--primary);
    transform: translateX(2px);
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.product-image {
    position: relative;
    padding-top: 100%;
    /* 1:1 Aspect Ratio */
    background: #f3f4f6;
    overflow: hidden;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
    /* Subtle zoom */
}

.badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: #ef4444;
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 99px;
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

.product-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-title {
    font-size: 1.1rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
    line-height: 1.4;
}

.product-title a {
    text-decoration: none;
    color: var(--text);
    transition: color 0.2s;
}

.product-title a:hover {
    color: var(--primary);
}

.product-price {
    margin-top: auto;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.original-price {
    font-size: 0.9rem;
    color: var(--text-light);
    text-decoration: line-through;
    font-weight: 400;
}

.add-to-cart {
    width: 100%;
    justify-content: center;
    font-weight: 600;
}

/* Footer */
footer.site-footer {
    background: #111827;
    color: #9ca3af;
    padding: 4rem 0;
    margin-top: 5rem;
    font-size: 0.9rem;
}

/* Forms */
input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

input:focus {
    border-color: var(--primary);
    ring: 2px solid var(--primary);
}