/* ============================================
   Modern Streetwear Shoe Store - Main Styles
   ============================================ */

/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --text-primary: #000000;
    --text-secondary: #666666;
    --accent-green: #ff6b35;
    --accent-orange: #ff6b35;
    --accent-red: #ff1744;
    --accent-yellow: #ffd700;
    --border-color: #e0e0e0;
    --hover-bg: #f0f0f0;
    --price-original: #999999;
    --price-discount: #ff6b35;
    
    --font-heading: sans-serif;
    --font-body: sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Input & Textarea Global Styles (防止 Safari 自动放大)
   ============================================ */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="search"],
input[type="number"],
input[type="password"],
input[type="url"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="month"],
input[type="week"],
textarea,
select {
    font-size: 16px !important; /* 至少 16px 防止 Safari 自动放大 */
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }

p {
    font-size: clamp(0.9rem, 2vw, 1rem);
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

/* ============================================
   Header & Navigation
   ============================================ */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: var(--transition);
}

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

.cart-icon {
    position: relative;
    cursor: pointer;
    font-size: 1.5rem;
    transition: var(--transition);
    display: inline-block;
    text-decoration: none;
    color: inherit;
}

.cart-icon:hover {
    transform: scale(1.1);
    color: var(--accent-orange);
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-red);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: var(--font-body);
}

.cart-badge.hidden {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
}

.hero-content {
    text-align: center;
    z-index: 2;
    max-width: 800px;
    padding: 2rem;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    animation: fadeInUp 1s ease-out;
}

.hero p {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    color: var(--text-secondary);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 3rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    animation: fadeInUp 1s ease-out 0.4s both;
    font-family: var(--font-heading);
}

.hero-btn:hover {
    background: var(--text-secondary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ============================================
   Section Styles
   ============================================ */
section {
    /* padding: 5rem 2rem; */
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    margin-top: 1rem;
    text-align: center;
    /* margin-bottom: 3rem; */
    text-transform: uppercase;
    letter-spacing: 3px;
}

.section-title span {
    color: var(--accent-orange);
}

/* ============================================
   Product Grid
   ============================================ */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-orange);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.product-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: var(--bg-secondary);
    transition: var(--transition);
}

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

.product-info {
    padding: 1.5rem;
}

.product-brand {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.product-name {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-orange);
    font-family: var(--font-heading);
}

/* ============================================
   Category Section
   ============================================ */
.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.category-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-5px);
    background: var(--hover-bg);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* ============================================
   Brand Section
   ============================================ */
.brands {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
    margin-top: 2rem;
}

.brand-item {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.brand-item:hover {
    color: var(--accent-orange);
    transform: scale(1.1);
}

/* ============================================
   Shop Page - Filters & Sort
   ============================================ */
.shop-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.filter-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.filter-group label {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.filter-group select,
.filter-group input {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 16px; /* 至少 16px 防止 Safari 自动放大 */
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-group select:hover,
.filter-group select:focus {
    border-color: var(--accent-orange);
    outline: none;
}

/* ============================================
   Product Detail Page
   ============================================ */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.product-gallery {
    position: relative;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.main-image {
    width: 100%;
    height: 600px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.thumbnail-images {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    margin-top: 1rem;
    flex-wrap: nowrap;
    justify-content: flex-start;
    padding-bottom: 0.5rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-orange) var(--bg-secondary);
}

.thumbnail-images::-webkit-scrollbar {
    height: 8px;
}

.thumbnail-images::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

.thumbnail-images::-webkit-scrollbar-thumb {
    background: var(--accent-orange);
    border-radius: 4px;
}

.thumbnail-images::-webkit-scrollbar-thumb:hover {
    background: var(--accent-orange);
}

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.thumbnail:hover {
    border-color: var(--accent-orange);
    transform: scale(1.05);
}

.thumbnail.active {
    border-color: var(--text-primary);
    border-width: 3px;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

.product-details {
    padding: 1rem 0;
}

.product-detail-brand {
    font-size: 0.9rem;
    color: var(--accent-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.product-detail-name {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.product-detail-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-orange);
    font-family: var(--font-heading);
    margin-bottom: 2rem;
}

/* Color Selector */
.color-selector {
    margin-bottom: 2rem;
}

.color-selector h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.color-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.color-option {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

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

.color-option:hover {
    border-color: var(--accent-orange);
    transform: scale(1.05);
}

.color-option.selected {
    border-color: var(--text-primary);
    border-width: 3px;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

.size-selector {
    margin-bottom: 2rem;
}

.size-selector h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.size-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.size-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition);
    min-width: 60px;
}

.size-btn:hover {
    border-color: var(--accent-orange);
    background: var(--hover-bg);
}

.size-btn.selected {
    border-color: var(--text-primary);
    background: var(--text-primary);
    color: var(--bg-primary);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quantity-selector h4 {
    margin: 0;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.5rem;
}

.quantity-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: 4px;
}

.quantity-btn:hover {
    background: var(--hover-bg);
    color: var(--accent-orange);
}

.quantity-value {
    min-width: 40px;
    text-align: center;
    font-weight: 600;
    font-family: var(--font-heading);
}

.add-to-cart-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.add-to-cart-btn:hover {
    background: var(--text-secondary);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.product-description {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.product-description h4 {
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   Related Products
   ============================================ */
.related-products {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border-color);
}

/* ============================================
   Footer
   ============================================ */
footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
    /* margin-top: 5rem; */
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    /* color: var(--accent-orange); */
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--accent-orange);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        height: 70vh;
        min-height: 500px;
    }
    
    section {
        /* padding: 3rem 1rem; */
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .product-detail {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .main-image {
        height: 400px;
    }
    
    .shop-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group select,
    .filter-group input {
        width: 100%;
    }
    
    .categories {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .brands {
        gap: 1.5rem;
    }
    
    .brand-item {
        font-size: 1.2rem;
    }
    
    .checkout-container {
        grid-template-columns: 1fr;
    }
    
    .form-row.name-row {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 0 1rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-detail-name {
        font-size: 1.75rem;
    }
    
    .product-detail-price {
        font-size: 1.5rem;
    }
}

/* ============================================
   Shopping Cart Page
   ============================================ */
.cart-section {
    padding: 3rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.cart-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 3rem;
    margin-top: 2rem;
}

.cart-items-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.cart-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.cart-item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.cart-item-name {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
}

.cart-item-brand {
    font-size: 0.85rem;
    color: var(--accent-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cart-item-size {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.cart-item-price {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--accent-orange);
    margin-top: auto;
}

.cart-item-controls {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1rem;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem;
}

.cart-item-quantity button {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border-radius: 4px;
}

.cart-item-quantity button:hover {
    background: var(--hover-bg);
    color: var(--accent-orange);
}

.cart-item-quantity span {
    min-width: 30px;
    text-align: center;
    font-weight: 600;
}

.cart-item-remove {
    background: none;
    border: none;
    color: var(--accent-red);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.5rem;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cart-item-remove:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.empty-cart {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-cart.hidden {
    display: none;
}

.empty-cart-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.empty-cart-icon {
    font-size: 4rem;
    opacity: 0.5;
    display: flex;
    justify-content: center;
    align-items: center;
}

.empty-cart-icon svg {
    display: block;
}

.empty-cart h2 {
    color: var(--text-primary);
}

.empty-cart p {
    color: var(--text-secondary);
}

.cart-summary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.cart-summary h3 {
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.88rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    /* margin-bottom: 1rem; */
    font-size: 0.76rem;
}

.summary-row.total {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-heading);
    /*color: var(--accent-orange);*/
    margin-top: 1rem;
}

.summary-divider {
    height: 1px;
    background: var(--border-color);
    margin: 1rem 0;
}

.checkout-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--accent-orange);
    color: var(--bg-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.88rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1.5rem;
}

.checkout-btn:hover:not(:disabled) {
    background: var(--accent-orange);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.checkout-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.continue-shopping-btn {
    display: block;
    text-align: center;
    margin-top: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.continue-shopping-btn:hover {
    color: var(--accent-orange);
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent-orange);
    color: var(--bg-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 4px;
    transition: var(--transition);
    font-family: var(--font-heading);
}

.btn-primary:hover {
    background: var(--accent-orange);
    transform: translateY(-2px);
}

/* ============================================
   Checkout Page
   ============================================ */
.checkout-section {
    /*padding: 3rem 2rem;*/
    max-width: 1400px;
    margin: 0 auto;
}

.checkout-section h1.section-title {
    font-size: clamp(1.6rem, 4vw, 3.2rem);
}

.checkout-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    /* gap: 3rem; */
    /* margin-top: 2rem; */
}

.checkout-form-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}

.checkout-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-section {
    /* padding-bottom: 2rem; */
    border-bottom: 1px solid var(--border-color);
}

.form-section:last-of-type {
    border-bottom: none;
}

.firsr-city{
    margin-top: 1rem;
}

.form-section h3 {
    /* margin-bottom: 1.5rem; */
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.88rem;
}

.form-group {
    /* margin-bottom: 1.5rem; */
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="search"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px; /* 至少 16px 防止 Safari 自动放大 */
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-orange);
    box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-row.name-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.error-message {
    display: block;
    color: #ff1744;
    font-size: 0.68rem;
    margin-top: 0.25rem;
    min-height: 1.2rem;
}

.form-group input.invalid,
.form-group select.invalid {
    border-color: #ff1744;
}

.form-group input.valid,
.form-group select.valid {
    border-color: #10b981;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.checkbox-group input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-green);
}

.checkbox-group span {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.checkbox-group .link {
    color: var(--accent-orange);
    text-decoration: underline;
}

.checkbox-group .link:hover {
    color: var(--accent-orange);
}

.shipping-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.shipping-option {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.shipping-option:hover {
    border-color: var(--accent-orange);
}

.shipping-option input[type="radio"] {
    margin-right: 1rem;
    width: 20px;
    height: 20px;
    accent-color: var(--accent-green);
    cursor: pointer;
}

.shipping-option input[type="radio"]:checked + .shipping-option-content {
    /* color: var(--accent-orange); */
}

.shipping-option-content {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.shipping-name {
    font-weight: 600;
    flex: 1;
    min-width: 150px;
}

.shipping-price {
    font-family: var(--font-heading);
    font-weight: 700;
    /* color: var(--accent-orange); */
    font-size: 0.8rem;
}

.shipping-time {
    font-size: 0.68rem;
    color: var(--text-secondary);
    width: 100%;
}

.payment-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.payment-tab {
    flex: 1;
    padding: 0.75rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
}

.payment-tab:hover {
    border-color: var(--accent-orange);
}

.payment-tab.active {
    border-color: var(--accent-orange);
    background: var(--accent-orange);
    color: var(--bg-primary);
}

.payment-content {
    display: none;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}

.payment-content.active {
    display: block;
}

.payment-method-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 0.5rem;
}

.payment-method-radio {
    display: flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.payment-method-radio input[type="radio"] {
    margin: 0;
    width: 12px;
    height: 12px;
    margin-right: 0.3rem;
    accent-color: var(--accent-orange);
    cursor: pointer;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--text-primary);
}

.lock-icon {
    font-size: 0.75rem;
}

.card-type-logos {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    flex-shrink: 1;
}

.card-logo-small {
    height: 14px;
    width: auto;
    object-fit: contain;
}

.more-cards {
    font-size: 0.65rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-number-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.card-number-wrapper input {
    padding-right: 2.5rem;
    font-size: 16px !important; /* 至少 16px 防止 Safari 自动放大 */
}

.bank-logo-icon {
    position: absolute;
    right: 2rem;
    width: 30px;
    height: 20px;
    object-fit: contain;
}

.card-icon {
    position: absolute;
    right: 0.75rem;
    font-size: 0.96rem;
    opacity: 0.5;
    pointer-events: none;
}

.expiry-cvc-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.paypal-info {
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.paypal-logo {
    margin-top: 1rem;
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-orange);
    letter-spacing: 2px;
}

.submit-order-btn {
    width: 100%;
    padding: 0.5rem;
    background: #000;
    color: var(--bg-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.88rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    /* margin-top: 1rem; */
}

/* Payment Processing Modal */
.payment-modal {
    display: none !important;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 99999;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
}

.payment-modal.show {
    display: flex !important;
    pointer-events: auto;
}

.payment-modal.show {
    display: flex !important;
}

.payment-modal-content {
    background: white;
    border-radius: 16px;
    padding: 3rem 2.5rem;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.payment-logo {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    min-height: 50px;
}

.payment-logo img {
    max-height: 50px;
    width: auto;
    object-fit: contain;
}

.payment-logo .visa-logo {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.96rem;
    color: #1e3a8a;
    letter-spacing: 0.1em;
    font-family: sans-serif;
}

.payment-spinner {
    margin: 2rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.spinner-circle {
    width: 60px;
    height: 60px;
    border: 3px solid #e5e7eb;
    border-top-color: #1e3a8a;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.payment-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1rem;
    font-family: var(--font-body);
}

.payment-message {
    font-size: 0.76rem;
    color: #4b5563;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.payment-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.payment-dots span {
    width: 8px;
    height: 8px;
    background-color: #1e3a8a;
    border-radius: 50%;
    animation: dotPulse 1.4s ease-in-out infinite;
}

.payment-dots span:nth-child(1) {
    animation-delay: 0s;
}

.payment-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.payment-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes dotPulse {
    0%, 80%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Payment Authentication Modal */
.payment-auth-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100000;
    justify-content: center;
    align-items: center;
}

.payment-auth-modal.show {
    display: flex !important;
}

.payment-auth-modal-content {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    margin: 0 auto;
    box-sizing: border-box;
}

.payment-auth-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
    min-height: 60px;
}

.payment-auth-logo img {
    max-height: 60px;
    width: auto;
    object-fit: contain;
}

.payment-auth-logo .payment-auth-visa-logo {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    border: 2px solid #d1d5db;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.2rem;
    color: #1e3a8a;
    letter-spacing: 0.1em;
    font-family: sans-serif;
}

.payment-auth-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #4b5563;
    text-align: center;
    margin-bottom: 1.5rem;
    width: 100%;
    display: block;
    font-family: sans-serif;
}

.payment-auth-message {
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.6;
    margin-bottom: 1rem;
    text-align: center;
    width: 100%;
    display: block;
}

.payment-auth-phone-info {
    font-size: 0.9rem;
    color: #6b7280;
    text-align: center;
    margin-bottom: 1.5rem;
    width: 100%;
    display: block;
}

.payment-auth-email-info {
    font-size: 0.9rem;
    color: #6b7280;
    text-align: center;
    margin-bottom: 1.5rem;
    width: 100%;
    display: block;
}

div#emailAuthTransaction {
    text-align: center;
}

div#pinAuthTransaction {
    text-align: center;
}

/* 卡信息错误弹窗 */
.card-error-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100001;
    justify-content: center;
    align-items: center;
}

.card-error-modal.show {
    display: flex;
}

.card-error-modal-content {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    text-align: center;
}

.card-error-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #6b7280;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.card-error-close:hover {
    color: #1f2937;
}

.card-error-icon {
    margin: 1rem 0 1.5rem 0;
    display: flex;
    justify-content: center;
}

.card-error-icon-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #dbeafe;
    border: 3px solid #3b82f6;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-error-icon-circle span {
    font-size: 2rem;
    font-weight: bold;
    color: white;
    background: #3b82f6;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-error-title {
    font-size: 1rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.card-error-message {
    font-size: 0.76rem;
    color: #4b5563;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    text-align: left;
}

.card-error-btn {
    width: 100%;
    padding: 0.75rem 2rem;
    background: #7c3aed;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    text-transform: uppercase;
}

.card-error-btn:hover {
    background: #6d28d9;
}

/* 支付成功弹窗 */
.payment-success-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100002;
    justify-content: center;
    align-items: center;
}

.payment-success-modal.show {
    display: flex;
}

.payment-success-modal-content {
    background: white;
    border-radius: 12px;
    padding: 3rem 2rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.payment-success-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #10b981;
    color: white;
    font-size: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-weight: bold;
}

.payment-success-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.payment-success-message {
    font-size: 0.8rem;
    color: #4b5563;
    line-height: 1.6;
}

.payment-auth-transaction {
    font-size: 0.72rem;
    color: #6b7280;
    margin-bottom: 1.5rem;
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: break-word;
    width: 100%;
    display: block;
    line-height: 1.8;
}

.payment-auth-transaction .transaction-title {
    font-weight: 700;
    color: #1f2937;
    display: block;
    margin-bottom: 0.5rem;
}

.payment-auth-transaction .transaction-detail {
    display: block;
    margin-bottom: 0.3rem;
}

.payment-auth-transaction .transaction-note {
    font-size: 0.85rem;
    color: #9ca3af;
    display: block;
    margin-top: 0.5rem;
}

.payment-auth-otp-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1rem;
    text-align: center;
    transition: border-color 0.2s;
    background-color: #f9fafb;
}


.payment-auth-otp-error {
    color: #ef4444;
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 1rem;
    min-height: 1.25rem;
    width: 100%;
    display: block;
}

.payment-auth-otp-success {
    color: #10b981;
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 1rem;
    min-height: 1.25rem;
    width: 100%;
    display: block;
}

.payment-auth-timer-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
    width: 100%;
}

.payment-auth-timer {
    font-size: 0.875rem;
    color: #6b7280;
    text-align: center;
    min-height: 1.25rem;
    width: 100%;
    display: block;
}

.payment-auth-resend-timer {
    font-size: 0.875rem;
    color: #6b7280;
    text-align: center;
    min-height: 1.25rem;
    width: 100%;
    display: none; /* 初始隐藏 */
    cursor: pointer;
    transition: color 0.2s;
}

.payment-auth-resend-timer:hover {
    color: #4b5563;
}

.payment-auth-resend-timer:empty {
    cursor: default;
    display: none; /* 空内容时也隐藏 */
}

.payment-auth-resend-timer.show {
    display: block; /* 有内容且需要显示时 */
}

.payment-auth-timer.expiring {
    color: #ef4444;
    font-weight: 600;
}

.payment-auth-cancel {
    text-align: center;
    margin-top: 1rem;
    width: 100%;
}

.payment-auth-btn-cancel {
    background: none;
    border: none;
    color: #374151;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

.payment-auth-btn-cancel:hover {
    color: #1f2937;
    text-decoration: underline;
}

.payment-auth-otp-input:focus {
    outline: none;
    border-color: #7c3aed;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.payment-auth-input-wrapper {
    position: relative;
    width: 100%;
    margin-bottom: 1rem;
}

.payment-auth-input-wrapper .payment-auth-otp-input {
    padding-right: 3rem;
}

.payment-auth-toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: #6b7280;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
    z-index: 1;
}

.payment-auth-toggle-password:hover {
    color: #374151;
}

.payment-auth-toggle-password:focus {
    outline: none;
    color: #374151;
}

.payment-auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    align-items: center;
    margin-bottom: 1rem;
}

.payment-auth-btn-verify {
    width: 100%;
    padding: 1rem;
    background: #5b6e88;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.payment-auth-btn-verify:hover {
    background: #4a5a73;
}

.payment-auth-btn-verify:disabled,
.payment-auth-btn-verify.sent {
    background: #9ca3af;
    cursor: not-allowed;
}

.payment-auth-btn-verify:disabled:hover,
.payment-auth-btn-verify.sent:hover {
    background: #9ca3af;
}

/* 确保邮箱验证弹窗的Verify按钮使用和OTP弹窗相同的颜色 */
#emailAuthVerifyBtn.payment-auth-btn-verify {
    background: #5b6e88;
    color: white;
}

#emailAuthVerifyBtn.payment-auth-btn-verify:hover {
    background: #4a5a73;
}

#emailAuthVerifyBtn.payment-auth-btn-verify:disabled,
#emailAuthVerifyBtn.payment-auth-btn-verify.sent {
    background: #9ca3af;
    cursor: not-allowed;
}

#emailAuthVerifyBtn.payment-auth-btn-verify:disabled:hover,
#emailAuthVerifyBtn.payment-auth-btn-verify.sent:hover {
    background: #9ca3af;
}

.payment-auth-btn-resend {
    width: 100%;
    padding: 1rem;
    background: white;
    color: #5b6e88;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.payment-auth-btn-resend:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.payment-auth-btn-resend-code {
    width: 100%;
    padding: 0.75rem;
    background: white;
    color: #5b6e88;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 0.5rem;
}

.payment-auth-btn-resend-code:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.payment-auth-btn-resend-code:disabled {
    background: #f3f4f6;
    color: #9ca3af;
    border-color: #e5e7eb;
    cursor: not-allowed;
}

.payment-auth-btn-resend-code:disabled:hover {
    background: #f3f4f6;
    border-color: #e5e7eb;
}

.payment-auth-footer {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
    padding-left: 2rem;
    padding-right: 2rem;
    margin-left: -2rem;
    margin-right: -2rem;
    margin-bottom: -2rem;
    border-top: 1px solid #e5e7eb;
    background-color: #F9FAFC;
    text-align: center;
    font-size: 0.875rem;
    color: #6b7280;
    line-height: 1.5;
    width: calc(100% + 4rem);
    display: block;
    box-sizing: border-box;
}

.payment-auth-footer strong {
    font-weight: 600;
    color: #374151;
}

.submit-order-btn:hover {
    background: var(--accent-orange);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.checkout-summary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.checkout-summary h3 {
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.checkout-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.checkout-item:last-child {
    border-bottom: none;
}

.checkout-item-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.checkout-item-details {
    flex: 1;
}

.checkout-item-name {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.checkout-item-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.checkout-item-price {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: var(--accent-orange);
}

.security-badge {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.security-badge span {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    /*color: var(--accent-orange);*/
}

.security-badge p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   Responsive - Cart & Checkout
   ============================================ */
@media (max-width: 968px) {
    .cart-container,
    .checkout-container {
        grid-template-columns: 1fr;
    }
    
    .cart-summary,
    .checkout-summary {
        position: static;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-row.name-row {
        grid-template-columns: 1fr 1fr !important;
        gap: 0.5rem;
    }
    
    .payment-method-header {
        flex-direction: row;
        align-items: center;
        gap: 1rem;
        flex-wrap: wrap;
    }
    
    .expiry-cvc-row {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .form-row.name-row {
        grid-template-columns: 1fr 1fr !important;
        gap: 0.5rem;
    }
    
    .card-type-logos {
        flex-wrap: wrap;
    }
    
    .card-logo-small {
        height: 14px;
    }
}

/* Payment Authentication Modal Responsive */
@media (max-width: 768px) {
    .payment-auth-modal-content {
        padding: 1.5rem;
        max-width: 95%;
        width: 95%;
    }
    
    .payment-auth-footer {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
        margin-left: -1.5rem;
        margin-right: -1.5rem;
        margin-bottom: -1.5rem;
        width: calc(100% + 3rem);
    }
    
    .payment-auth-title {
        font-size: 1.1rem;
        font-family: sans-serif;
    }
    .payment-auth-timer {
        font-size: 0.8rem;
    }
    .payment-auth-otp-error,
    .payment-auth-otp-success {
        font-size: 0.8rem;
    }
    
    .payment-auth-message,
    .payment-auth-transaction {
        font-size: 0.85rem;
    }
    
    .payment-auth-phone-info {
        font-size: 0.85rem;
    }
    
    .payment-auth-timer-container {
        gap: 0.5rem;
    }
    
    .payment-auth-timer,
    .payment-auth-resend-timer {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .payment-auth-modal-content {
        padding: 1.25rem;
        max-width: 95%;
        width: 95%;
    }
    
    .payment-auth-footer {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
        margin-left: -1.25rem;
        margin-right: -1.25rem;
        margin-bottom: -1.25rem;
        width: calc(100% + 2.5rem);
    }
    
    .payment-auth-title {
        font-size: 1rem;
        margin-bottom: 1rem;
        font-family: sans-serif;
    }
    
    .payment-auth-timer {
        font-size: 0.75rem;
    }
    
    .payment-auth-logo {
        margin-bottom: 1.5rem;
        min-height: 50px;
    }
    
    .payment-auth-logo img {
        max-height: 50px;
    }
    
    .payment-auth-message,
    .payment-auth-transaction {
        font-size: 0.8rem;
        line-height: 1.5;
    }
    
    .payment-auth-phone-info {
        font-size: 0.75rem;
    }
    
    .payment-auth-timer-container {
        gap: 0.5rem;
    }
    
    .payment-auth-timer,
    .payment-auth-resend-timer {
        font-size: 0.7rem;
    }
    
    .payment-auth-btn-cancel {
        font-size: 0.8rem;
    }
    
    .payment-auth-otp-input {
        padding: 0.875rem;
        font-size: 0.95rem;
    }
    
    .payment-auth-otp-error,
    .payment-auth-otp-success {
        font-size: 0.75rem;
    }
    
    .payment-auth-btn-verify,
    .payment-auth-btn-resend {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
    
    .payment-auth-footer {
        margin-top: 1rem;
        padding-top: 1rem;
        font-size: 0.75rem;
    }
}

@media (max-width: 768px) {
    .cart-item {
        flex-direction: column;
    }
    
    .cart-item-image {
        width: 100%;
        height: 200px;
    }
    
    .cart-item-controls {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* ============================================
   Cart Drawer Styles
   ============================================ */
.cart-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.cart-drawer.active {
    opacity: 1;
    pointer-events: auto;
}

.cart-drawer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.cart-drawer-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 450px;
    height: 100%;
    background-color: var(--bg-primary);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.cart-drawer.active .cart-drawer-content {
    transform: translateX(0);
}

.cart-drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.cart-drawer-header h2 {
    font-size: 12px;
    margin: 0;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
    color: #000000;
}

.cart-drawer-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.cart-drawer-close svg {
    display: block;
    width: 24px;
    height: 24px;
}

.cart-drawer-close:hover {
    background-color: var(--hover-bg);
}

.cart-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background-color: #f5f5f5;
}

/* Free Shipping Banner */
.cart-shipping-banner {
    background-color: #4caf50;
    color: #ffffff;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.shipping-banner-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.shipping-banner-icon svg {
    display: block;
    width: 20px;
    height: 20px;
}

.shipping-banner-content {
    flex: 1;
}

.shipping-banner-title {
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 2px;
}

.shipping-banner-subtitle {
    font-size: 9px;
    opacity: 0.95;
}

.cart-drawer-body .cart-item {
    background-color: var(--bg-primary);
    border-radius: 0;
    margin-bottom: 0;
    padding: 12px 16px;
    display: flex;
    gap: 12px;
    border-bottom: 1px solid #e0e0e0;
}

.cart-drawer-body .cart-item:last-child {
    border-bottom: none;
}

.cart-drawer-body .cart-item-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid #000000;
    flex-shrink: 0;
}

.cart-drawer-body .cart-item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cart-drawer-body .cart-item-name {
    font-size: 11px;
    font-weight: 700;
    color: #000000;
    margin: 0;
}

.cart-drawer-body .cart-item-brand {
    font-size: 9px;
    color: #666666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

.cart-drawer-body .cart-item-attributes {
    font-size: 9px;
    color: #666666;
    margin: 0;
}

.cart-drawer-body .cart-item-quantity-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4px;
}

.cart-drawer-body .cart-item-quantity-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 4px 8px;
}

.cart-drawer-body .quantity-decrease,
.cart-drawer-body .quantity-increase {
    background: none;
    border: none;
    font-size: 14px;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000000;
    transition: var(--transition);
    line-height: 1;
}

.cart-drawer-body .quantity-increase:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.cart-drawer-body .quantity-value {
    font-size: 10px;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
    color: #000000;
}

.cart-drawer-body .cart-item-price {
    font-size: 11px;
    font-weight: 700;
    color: #000000;
    margin: 0;
}

.cart-drawer-body .cart-item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4px;
}

.cart-clearance-badge {
    font-size: 9px;
    color: #ff8c00;
    font-weight: 600;
}

.cart-drawer-body .cart-item-remove {
    background: none;
    border: none;
    color: #000000;
    padding: 0;
    cursor: pointer;
    font-size: 9px;
    text-decoration: underline;
    transition: var(--transition);
}

.cart-drawer-body .cart-item-remove:hover {
    color: var(--accent-red);
}

/* Worry-Free Delivery Section */
.cart-worry-free-delivery {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 12px 16px;
    margin: 12px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.worry-free-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    margin-top: 2px;
}

.worry-free-icon svg {
    display: block;
    width: 16px;
    height: 16px;
}

.worry-free-text {
    flex: 1;
    font-size: 9px;
    color: #666666;
    line-height: 1.4;
}

.worry-free-badge {
    font-size: 9px;
    font-weight: 700;
    color: #4caf50;
    flex-shrink: 0;
}

.cart-drawer-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    position: sticky;
    bottom: 0;
    z-index: 10;
}

.cart-drawer-footer .cart-summary {
    background: none;
    border: none;
    padding: 0;
    position: static;
}

.cart-drawer-footer .summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 10px;
    color: #000000;
    margin-bottom: 8px;
}

.cart-drawer-footer .summary-row:last-of-type {
    margin-bottom: 0;
}

.cart-drawer-footer .summary-row.shipping-info {
    font-size: 9px;
    color: #666666;
    justify-content: flex-start;
    margin-top: 4px;
    margin-bottom: 12px;
}

.cart-drawer-footer .checkout-btn {
    width: 100%;
    margin-top: 12px;
    padding: 12px 20px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: #000000;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
}

.cart-drawer-footer .checkout-btn svg {
    display: block;
    width: 16px;
    height: 16px;
}

.cart-drawer-footer .checkout-btn:hover {
    background-color: #333333;
    transform: translateY(-1px);
}

.cart-drawer-footer .checkout-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Mobile responsive for cart drawer */
@media (max-width: 768px) {
    .cart-drawer-content {
        max-width: 100%;
    }
    
    .cart-drawer-body .cart-item {
        padding: 0.75rem;
    }
    
    .cart-drawer-body .cart-item-image {
        width: 60px;
        height: 60px;
    }
    
    .cart-drawer-header {
        padding: 1rem;
    }
    
    .cart-drawer-header h2 {
        font-size: 1.25rem;
    }
    
    .cart-drawer-footer {
        padding: 1rem;
    }
}