/* Modern Checkout Styles */
:root {
    /* Import existing variables from shop.css */
    --primary: #8B4513;
    --primary-light: #A0522D;
    --primary-dark: #654321;
    --secondary: #D2691E;
    --accent: #CD853F;
    --background: #FAF9F6;
    --surface: #FFFFFF;
    --text-primary: #2C1810;
    --text-secondary: #6B5B73;
    --text-muted: #8B7D8B;
    --border: #E5E0DB;
    --brown-50: #FAF9F6;
    --brown-100: #F5F0EB;
    --brown-200: #E5E0DB;
    --brown-300: #D4C4B0;
    --brown-400: #C4A484;
    --brown-500: #B8946F;
    --brown-600: #A67C52;
    --brown-700: #8B5A2B;
    --brown-800: #6B4423;
    --brown-900: #4A2C17;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

/* Checkout Layout */
.checkout-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
    min-height: 80vh;
}

/* Checkout Header */
.checkout-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--brown-50) 0%, var(--background) 100%);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.checkout-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="checkout" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="%23A0522D" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23checkout)"/></svg>');
    opacity: 0.3;
}

.checkout-header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
    position: relative;
    z-index: 2;
}

.checkout-header h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 2px;
}

.checkout-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin: 0;
    position: relative;
    z-index: 2;
}

/* Checkout Content */
.checkout-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-2xl);
    align-items: start;
}

/* Checkout Form */
.checkout-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* Checkout Steps */
.checkout-step {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    transition: opacity 0.3s ease, transform 0.3s ease, display 0.3s ease;
    position: relative;
    overflow: hidden;
}

.checkout-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}

.checkout-step.hidden {
    display: none;
}

.checkout-step:not(.hidden) {
    animation: fadeInUp 0.4s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.checkout-step h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-xl) 0;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.checkout-step h2::before {
    content: '';
    width: 4px;
    height: 30px;
    background: var(--primary);
    border-radius: 2px;
}

/* Form Rows */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.form-row:last-child {
    margin-bottom: 0;
}

/* Form Groups */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.form-control {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

.form-control[readonly] {
    background: var(--brown-50);
    color: var(--primary);
    font-weight: 600;
    cursor: not-allowed;
    border-color: var(--brown-200);
}

.form-control[readonly]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

/* Promo Code Styling */
#promoCode {
    background: linear-gradient(135deg, var(--brown-50) 0%, var(--brown-100) 100%);
    border: 2px dashed var(--primary);
    font-weight: 600;
    color: var(--primary);
    position: relative;
}

#promoCode:focus {
    border: 2px solid var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

#promoCode::placeholder {
    color: var(--primary);
    opacity: 0.7;
}

/* Promo Code Messages */
#promoCodeMessage {
    margin-top: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    animation: slideInDown 0.3s ease-out;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Payment Widget */
.payment-widget {
    background: var(--brown-50);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Summary Details */
.summary-details {
    background: var(--brown-50);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--border);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    border-bottom: 1px solid rgba(139, 69, 19, 0.1);
    font-size: 0.95rem;
}

.summary-row:last-child {
    border-bottom: none;
}

.summary-row span:first-child {
    color: var(--text-secondary);
    font-weight: 500;
}

.summary-row span:last-child {
    color: var(--text-primary);
    font-weight: 600;
}

.discount-row {
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin: var(--space-sm) 0;
    border: 1px solid rgba(16, 185, 129, 0.3);
    animation: slideInUp 0.3s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.total-row {
    background: var(--primary);
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-top: var(--space-md);
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.total-row span {
    color: white !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    background: var(--brown-300);
    border-color: var(--brown-300);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.1rem;
    width: 100%;
}

/* Checkout Summary */
.checkout-summary {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    position: sticky;
    top: var(--space-xl);
    height: fit-content;
}

.checkout-summary h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-lg) 0;
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--brown-100);
}

/* Checkout Items */
#checkoutItems {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.checkout-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--brown-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.checkout-item-image {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--brown-100);
    flex-shrink: 0;
}

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

.checkout-item-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brown-100);
    color: var(--text-muted);
    font-size: 1.5rem;
}

.checkout-item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.checkout-item-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.checkout-item-price {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

.checkout-item-quantity {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

/* Step Indicators */
.step-indicators {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-2xl);
    gap: var(--space-lg);
}

.step-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--brown-100);
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.step-indicator.active {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.step-indicator.completed {
    background: var(--success);
    color: white;
}

.step-indicator i {
    font-size: 1rem;
}

/* Loading States */
.checkout-step.loading {
    opacity: 0.6;
    pointer-events: none;
}

.checkout-step.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 3px solid var(--brown-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Animations */
.checkout-step {
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Step Actions */
.step-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

.step-actions .btn {
    min-width: 140px;
}

.step-actions .btn i {
    margin: 0 var(--space-xs);
}

/* Step Description */
.step-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

/* Shipping Options */
.shipping-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.shipping-option {
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    cursor: pointer;
}

.shipping-option:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.shipping-option.selected {
    border-color: var(--primary);
    background: var(--brown-50);
    box-shadow: var(--shadow-lg);
}

.shipping-option-header {
    position: relative;
}

.shipping-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.shipping-label {
    display: flex;
    align-items: center;
    padding: var(--space-xl);
    cursor: pointer;
    width: 100%;
    gap: var(--space-lg);
}

.shipping-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.shipping-info {
    flex: 1;
}

.shipping-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-sm) 0;
}

.shipping-info p {
    color: var(--text-secondary);
    margin: 0 0 var(--space-md) 0;
    font-size: 0.95rem;
}

.shipping-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.shipping-features .feature {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.shipping-features .feature i {
    color: var(--success);
    font-size: 0.8rem;
}

.shipping-price {
    text-align: right;
    flex-shrink: 0;
}

.shipping-price .price {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--space-xs);
}

.shipping-price .free-condition {
    display: block;
    font-size: 0.85rem;
    color: var(--success);
    font-weight: 600;
}

/* Shipping Option Selection */
.shipping-option input[type="radio"]:checked + .shipping-label {
    background: var(--brown-50);
}

.shipping-option input[type="radio"]:checked ~ .shipping-option-header {
    border-color: var(--primary);
}

.shipping-option:has(input[type="radio"]:checked) {
    border-color: var(--primary);
    background: var(--brown-50);
    box-shadow: var(--shadow-lg);
}

.shipping-option:has(input[type="radio"]:checked) .shipping-icon {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: scale(1.05);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .checkout-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .checkout-summary {
        position: static;
        order: -1;
    }
}

@media (max-width: 768px) {
    .checkout-layout {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .checkout-header {
        padding: var(--space-xl) var(--space-md);
    }
    
    .checkout-step {
        padding: var(--space-lg);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .step-indicators {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .step-indicator {
        font-size: 0.8rem;
        padding: var(--space-xs) var(--space-sm);
    }
    
    .checkout-summary {
        padding: var(--space-lg);
    }
    
    .summary-details {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .checkout-layout {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .checkout-header h1 {
        font-size: 2rem;
    }
    
    .checkout-header p {
        font-size: 1rem;
    }
    
    .checkout-step {
        padding: var(--space-md);
    }
    
    .checkout-step h2 {
        font-size: 1.5rem;
    }
    
    .form-control {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: var(--space-md) var(--space-lg);
        font-size: 1rem;
    }
    
    .checkout-summary {
        padding: var(--space-md);
    }
    
    .checkout-item {
        padding: var(--space-sm);
    }
    
    .checkout-item-image {
        width: 50px;
        height: 50px;
    }
    
    .checkout-item-title {
        font-size: 0.8rem;
    }
    
    .checkout-item-price,
    .checkout-item-quantity {
        font-size: 0.7rem;
    }
    
    .summary-row {
        font-size: 0.9rem;
        padding: var(--space-sm) 0;
    }
    
    .total-row {
        padding: var(--space-md);
        font-size: 1rem;
    }
    
    /* Login Required Message Mobile */
    .login-required-message {
        padding: var(--space-xl) var(--space-md);
        margin: var(--space-lg) 0;
    }
    
    .login-required-icon {
        width: 60px;
        height: 60px;
        margin-bottom: var(--space-lg);
    }
    
    .login-required-icon i {
        font-size: 1.5rem;
    }
    
    .login-required-message h2 {
        font-size: 1.5rem;
    }
    
    .login-required-message p {
        font-size: 1rem;
    }
    
    .login-required-actions {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .login-required-actions .btn {
        min-width: unset;
        width: 100%;
    }
    
    .login-required-benefits {
        padding: var(--space-lg);
    }
    
    .login-required-benefits ul {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .login-required-benefits h3 {
        font-size: 1.1rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
.form-control:focus,
.btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Login Required Message */
.login-required-message {
    background: var(--surface);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
    margin: var(--space-2xl) 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    text-align: center;
    animation: slideInUp 0.5s ease-out;
}

.login-required-content {
    max-width: 600px;
    margin: 0 auto;
}

.login-required-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-xl);
    box-shadow: var(--shadow-md);
}

.login-required-icon i {
    font-size: 2rem;
    color: white;
}

.login-required-message h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
}

.login-required-message p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0 0 var(--space-2xl) 0;
    line-height: 1.6;
}

.login-required-actions {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.login-required-actions .btn {
    min-width: 180px;
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    transition: var(--transition-normal);
}

.btn-secondary {
    background: var(--brown-100);
    color: var(--text-primary);
    border: 2px solid var(--brown-200);
}

.btn-secondary:hover {
    background: var(--brown-200);
    border-color: var(--brown-300);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.login-required-benefits {
    background: var(--brown-50);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--border);
    text-align: left;
}

.login-required-benefits h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-lg) 0;
    text-align: center;
}

.login-required-benefits ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
}

.login-required-benefits li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: var(--space-sm) 0;
}

.login-required-benefits li i {
    color: var(--success);
    font-size: 1rem;
    width: 16px;
    text-align: center;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .checkout-step,
    .checkout-summary {
        border: 2px solid currentColor;
    }
    
    .btn-primary {
        border: 2px solid currentColor;
    }
}