/* ===================================
   MONOCHROME POD Store - Main Stylesheet
   Clean, minimal, monochrome aesthetic
   =================================== */

/* CSS Variables */
:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    --max-width: 1200px;
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: sticky;
    top: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md);
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

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

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-black);
}

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

.snipcart-checkout {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.snipcart-checkout:hover {
    background: var(--color-gray-800);
}

.snipcart-items-count {
    background: var(--color-white);
    color: var(--color-black);
    padding: 0.125rem 0.375rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 1.25rem;
    text-align: center;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-container {
        padding: var(--spacing-md);
    }
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding: var(--spacing-3xl) var(--spacing-md);
    max-width: var(--max-width);
    margin: 0 auto;
    min-height: 70vh;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-500);
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 8px;
}

@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin: 0 auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        order: 1;
    }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--color-gray-800);
}

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

.btn-secondary:hover {
    background: var(--color-black);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-black);
    border: 1px solid var(--color-gray-300);
}

.btn-outline:hover {
    border-color: var(--color-black);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
    width: 100%;
}

.btn-add-cart {
    background: var(--color-black);
    color: var(--color-white);
    margin-top: var(--spacing-md);
}

.btn-add-cart:hover {
    background: var(--color-gray-700);
}

/* ===================================
   Products Grid
   =================================== */
.featured,
.products-section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-link {
    display: block;
}

.product-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-gray-100);
}

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

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

.product-info {
    padding: var(--spacing-md);
}

.product-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.product-price {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.product-price-large {
    font-size: 1.5rem;
    font-weight: 700;
    margin: var(--spacing-md) 0;
}

.product-card .btn-add-cart {
    margin: 0 var(--spacing-md) var(--spacing-md);
    width: calc(100% - 2rem);
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

@media (max-width: 640px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .product-info {
        padding: var(--spacing-sm);
    }
    
    .product-info h3 {
        font-size: 0.875rem;
    }
    
    .product-price {
        font-size: 0.75rem;
    }
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.about-content p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.features-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 0.75rem;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .about-image {
        order: -1;
    }
}

/* ===================================
   Newsletter
   =================================== */
.newsletter {
    padding: var(--spacing-3xl) 0;
    background: var(--color-black);
    color: var(--color-white);
    text-align: center;
}

.newsletter h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.newsletter p {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 1px solid var(--color-gray-700);
    background: var(--color-gray-900);
    color: var(--color-white);
    border-radius: 4px;
    font-size: 1rem;
}

.newsletter-form input::placeholder {
    color: var(--color-gray-500);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-white);
}

.newsletter-form .btn {
    white-space: nowrap;
}

@media (max-width: 640px) {
    .newsletter-form {
        flex-direction: column;
    }
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--color-gray-900);
    color: var(--color-gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .nav-logo {
    color: var(--color-white);
    display: block;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    display: block;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
    font-size: 0.75rem;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
}

/* ===================================
   Page Header
   =================================== */
.page-header {
    padding: var(--spacing-2xl) 0;
    background: var(--color-gray-100);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-description {
    color: var(--color-gray-500);
    font-size: 1.125rem;
}

/* ===================================
   Filter Bar
   =================================== */
.filter-bar {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.filter-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.filter-options {
    display: flex;
    gap: var(--spacing-sm);
}

.filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    background: var(--color-white);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.sort-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sort-options label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.sort-options select {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    background: var(--color-white);
    cursor: pointer;
}

/* ===================================
   Breadcrumb
   =================================== */
.breadcrumb {
    padding: var(--spacing-md) 0;
    background: var(--color-gray-100);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-black);
}

.breadcrumb span {
    margin: 0 var(--spacing-sm);
    color: var(--color-gray-400);
}

/* ===================================
   Product Detail
   =================================== */
.product-detail {
    padding: var(--spacing-3xl) 0;
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.product-images {
    position: sticky;
    top: 100px;
    align-self: start;
}

.main-image {
    aspect-ratio: 1;
    background: var(--color-gray-100);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-row {
    display: flex;
    gap: var(--spacing-sm);
}

.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: 4px;
    overflow: hidden;
    border: 2px solid transparent;
    background: var(--color-gray-100);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.thumbnail:hover,
.thumbnail.active {
    border-color: var(--color-black);
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info-detail h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* Option Groups */
.option-group {
    margin-bottom: var(--spacing-lg);
}

.option-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.size-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.size-btn {
    min-width: 48px;
    height: 48px;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--color-white);
    transition: all var(--transition-fast);
}

.size-btn:hover,
.size-btn.active {
    border-color: var(--color-black);
    background: var(--color-black);
    color: var(--color-white);
}

.color-options {
    display: flex;
    gap: var(--spacing-sm);
}

.color-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-btn:hover,
.color-btn.active {
    border-color: var(--color-black);
    transform: scale(1.1);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 0;
    width: fit-content;
}

.qty-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-gray-300);
    background: var(--color-white);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qty-btn:first-child {
    border-radius: 4px 0 0 4px;
}

.qty-btn:last-child {
    border-radius: 0 4px 4px 0;
}

.quantity-selector input {
    width: 60px;
    height: 40px;
    border: 1px solid var(--color-gray-300);
    border-left: none;
    border-right: none;
    text-align: center;
    font-size: 1rem;
    font-family: inherit;
}

.quantity-selector input::-webkit-inner-spin-button,
.quantity-selector input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Product Features */
.product-features {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-200);
}

.product-features h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.product-features ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.product-features li {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    padding-left: var(--spacing-md);
    position: relative;
}

.product-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-gray-400);
}

/* Size Guide */
.size-guide {
    margin-top: var(--spacing-lg);
    font-size: 0.875rem;
}

.size-guide summary {
    cursor: pointer;
    color: var(--color-gray-500);
    text-decoration: underline;
}

.size-guide table {
    width: 100%;
    margin-top: var(--spacing-md);
    border-collapse: collapse;
}

.size-guide th,
.size-guide td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.size-guide th {
    font-weight: 600;
}

.fit-info {
    margin-top: var(--spacing-md);
}

.fit-info p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-600);
}

@media (max-width: 968px) {
    .product-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .product-images {
        position: static;
    }
}

/* ===================================
   Related Products
   =================================== */
.related-products {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-100);
}

.related-products h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

/* ===================================
   Utility Classes
   =================================== */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-xl); }