/**
 * Neutral Checkout Design System
 * Universal & Brand-Agnostic Payment Interface
 * Version: 3.0.0
 * 
 * Design Principles:
 * - Culturally neutral
 * - Accessible (WCAG 2.1 AA)
 * - Clean & Professional
 * - Adaptable to any brand
 */

/* ============================================
   NEUTRAL COLOR SYSTEM
   ============================================ */
:root {
    /* Primary - Professional Blue */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    
    /* Neutral Grays */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* Text */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --text-inverse: #ffffff;
    
    /* Borders */
    --border-color: #e5e7eb;
    --border-focus: #2563eb;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* ============================================
   HEADER - CLEAN & PROFESSIONAL
   ============================================ */
.checkout-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-6) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
}

/* Toggle Header Button (Mobile Only) */
.toggle-header-btn {
    display: none;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    z-index: 10;
}

.toggle-header-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-50%) scale(1.1);
}

.toggle-header-btn i {
    transition: transform var(--transition-base);
}

.toggle-header-btn.collapsed i {
    transform: rotate(180deg);
}

/* Header content collapsed state */
.header-content.collapsed {
    max-height: 0 !important;
    opacity: 0 !important;
    margin-bottom: 0 !important;
    pointer-events: none;
}

/* Compact header on mobile for better space usage */
@media (max-width: 768px) {
    .checkout-header {
        padding: var(--space-4) 0;
        position: relative;
    }
    
    .toggle-header-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .header-content {
        gap: var(--space-2);
        margin-bottom: var(--space-3);
    }
    
    .checkout-header .logo {
        max-height: 36px;
    }
    
    .checkout-header h1 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--space-1);
    }
    
    .header-subtitle {
        font-size: var(--font-size-xs);
    }
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    margin-bottom: var(--space-2);
}

.checkout-header .logo {
    max-height: 48px;
    width: auto;
    transition: opacity var(--transition-base);
}

.checkout-header .logo:hover {
    opacity: 0.8;
}

.header-text {
    text-align: center;
    width: 100%;
}

.checkout-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-2) 0;
    line-height: 1.3;
}

.header-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-1);
}

.header-subtitle::before {
    content: '🔒';
    font-size: var(--font-size-base);
}

/* Progress Steps - Minimalist */
.progress-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    position: relative;
    min-width: 80px;
}

.step::after {
    content: '';
    position: absolute;
    top: 18px;
    right: -20px;
    width: 24px;
    height: 2px;
    background: var(--gray-300);
}

.step:last-child::after {
    display: none;
}

.step.active::after {
    background: var(--primary-color);
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.step.active .step-number {
    background: var(--primary-color);
    color: var(--text-inverse);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.step-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.step.active .step-label {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   BACK NAVIGATION
   ============================================ */
.back-navigation {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) 0;
}

.back-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.back-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--gray-300);
}

.back-btn i {
    font-size: var(--font-size-base);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.checkout-main {
    padding: var(--space-12) 0;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    align-items: start;
}

@media (min-width: 1024px) {
    .checkout-grid {
        grid-template-columns: 380px 1fr;
    }
}

/* ============================================
   ORDER SUMMARY - CARD DESIGN
   ============================================ */
.order-summary {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

@media (min-width: 1024px) {
    .order-summary {
        position: sticky;
        top: calc(120px + var(--space-4));
    }
}

.order-summary h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--gray-200);
}

/* Package Info */
.package-info {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-6);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.package-icon {
    font-size: 3rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
}

.package-icon i {
    color: #ffffff;
}

.package-details {
    flex: 1;
}

.package-details h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: #ffffff;
}

.package-details p {
    font-size: var(--font-size-sm);
    opacity: 0.95;
    margin: var(--space-1) 0;
    color: rgba(255, 255, 255, 0.95);
}

/* Price Breakdown */
.price-breakdown {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-6);
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) 0;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.price-row.total {
    border-top: 2px solid var(--border-color);
    margin-top: var(--space-3);
    padding-top: var(--space-4);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

/* Features List */
.features-list {
    margin-bottom: var(--space-6);
}

.features-list h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.features-list ul {
    list-style: none;
}

.features-list li {
    padding: var(--space-2) 0;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.features-list li i {
    color: var(--success);
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

/* Support Box */
.support-box {
    background: var(--success-light);
    border: 1px solid var(--success);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    text-align: center;
}

.support-box p {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--success);
    color: var(--text-inverse);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.whatsapp-btn:hover {
    background: #0ea472;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   CHECKOUT FORM
   ============================================ */
.checkout-form-container {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.checkout-form-container h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--gray-200);
}

/* Alert Messages */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    border: 1px solid;
}

.alert-error {
    background: var(--error-light);
    border-color: var(--error);
    color: #991b1b;
}

.alert ul {
    margin: 0;
    padding-right: var(--space-5);
}

.alert li {
    margin: var(--space-1) 0;
}

/* Form Groups */
.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
}

.form-group label i {
    color: var(--primary-color);
    font-size: var(--font-size-base);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"] {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: all var(--transition-base);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.form-group small {
    display: block;
    margin-top: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

/* Checkbox */
.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    font-weight: normal !important;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-large {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-lg);
}

.btn-outline {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* Security Badges */
.security-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
}

.security-badges .badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

.security-badges .badge i {
    color: var(--success);
    font-size: var(--font-size-base);
}

/* ============================================
   FOOTER
   ============================================ */
.checkout-footer {
    background: var(--gray-900);
    color: var(--gray-400);
    text-align: center;
    padding: var(--space-8) 0;
    margin-top: var(--space-16);
}

.checkout-footer p {
    margin: 0;
    font-size: var(--font-size-sm);
}

/* ============================================
   ERROR PAGE
   ============================================ */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

.error-box {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    max-width: 600px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    text-align: center;
    border: 1px solid var(--border-color);
}

.error-icon {
    font-size: 4rem;
    color: var(--error);
    margin-bottom: var(--space-6);
}

.error-box h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.error-message {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--error-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--error);
}

.info-box {
    background: var(--info-light);
    border: 1px solid var(--info);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin: var(--space-6) 0;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    text-align: right;
}

.info-box i {
    font-size: var(--font-size-xl);
    color: var(--info);
    flex-shrink: 0;
}

.info-box p {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
    margin-top: var(--space-8);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .checkout-header {
        padding: var(--space-4) 0;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .progress-steps {
        gap: var(--space-4);
    }
    
    .step::after {
        right: -16px;
        width: 16px;
    }
    
    .step-label {
        display: none;
    }
    
    .checkout-main {
        padding: var(--space-8) 0;
    }
    
    .checkout-form-container {
        padding: var(--space-6);
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .back-buttons {
        flex-direction: column;
    }
    
    .back-btn {
        width: 100%;
        justify-content: center;
    }
    
    .security-badges {
        flex-direction: column;
        gap: var(--space-3);
    }
}

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

/* Focus Visible for Keyboard Navigation */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --bg-tertiary: #374151;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-tertiary: #9ca3af;
        --border-color: #374151;
    }
}

/* ============================================
   CHECKOUT NOTICE BOX - MULTIPLE NOTICES SUPPORT
   ============================================ */
.checkout-notice {
    margin-top: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    border: 1px solid;
    animation: slideIn 0.3s ease-out;
}

/* First notice has more top margin */
.checkout-notice:first-of-type {
    margin-top: var(--space-5);
}

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

.checkout-notice .notice-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
    line-height: 1;
    margin-top: 2px;
}

.checkout-notice .notice-content {
    flex: 1;
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

/* Notice Title */
.checkout-notice .notice-title {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.checkout-notice .notice-text {
    font-size: var(--font-size-sm);
}

/* Info Notice (Blue) */
.checkout-notice-info {
    background-color: var(--info-light);
    border-color: var(--info);
    color: #1e40af;
}

.checkout-notice-info .notice-icon {
    color: var(--info);
}

/* Warning Notice (Orange) */
.checkout-notice-warning {
    background-color: var(--warning-light);
    border-color: var(--warning);
    color: #92400e;
}

.checkout-notice-warning .notice-icon {
    color: var(--warning);
}

/* Success Notice (Green) */
.checkout-notice-success {
    background-color: var(--success-light);
    border-color: var(--success);
    color: #065f46;
}

.checkout-notice-success .notice-icon {
    color: var(--success);
}

/* Error Notice (Red) */
.checkout-notice-error {
    background-color: var(--error-light);
    border-color: var(--error);
    color: #991b1b;
}

.checkout-notice-error .notice-icon {
    color: var(--error);
}

/* RTL Support */
[dir="rtl"] .checkout-notice {
    direction: rtl;
}

/* Responsive Design */
@media (max-width: 768px) {
    .checkout-notice {
        padding: var(--space-3);
        gap: var(--space-2);
    }
    
    .checkout-notice .notice-icon {
        font-size: 1rem;
    }
    
    .checkout-notice .notice-title {
        font-size: var(--font-size-sm);
    }
    
    .checkout-notice .notice-text {
        font-size: var(--font-size-xs);
    }
}

/* Dark Mode for Notice */
@media (prefers-color-scheme: dark) {
    .checkout-notice-info {
        background-color: rgba(59, 130, 246, 0.1);
        color: #93c5fd;
    }
    
    .checkout-notice-warning {
        background-color: rgba(245, 158, 11, 0.1);
        color: #fcd34d;
    }
    
    .checkout-notice-success {
        background-color: rgba(16, 185, 129, 0.1);
        color: #6ee7b7;
    }
    
    .checkout-notice-error {
        background-color: rgba(239, 68, 68, 0.1);
        color: #fca5a5;
    }
}

/* ============================================
   COUPON SECTION
   ============================================ */
.coupon-section {
    margin-top: var(--space-5);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border-color);
}

.coupon-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    gap: var(--space-3);
}

.coupon-section h4 {
    margin: 0;
    font-size: var(--font-size-base);
    color: var(--text-primary);
}

.btn-show-coupons {
    padding: var(--space-2) var(--space-3);
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(245, 158, 11, 0.3);
}

.btn-show-coupons:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(245, 158, 11, 0.4);
}

.btn-show-coupons i {
    font-size: 1rem;
}

.coupon-input-group {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.coupon-input-group input {
    flex: 1;
    padding: var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-base);
}

.coupon-input-group input:focus {
    outline: none;
    border-color: var(--border-focus);
}

.coupon-input-group input:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
}

.btn-apply-coupon {
    padding: var(--space-3) var(--space-5);
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-base);
    white-space: nowrap;
}

.btn-apply-coupon:hover {
    background: var(--primary-hover);
}

.btn-apply-coupon:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-apply-coupon.btn-remove {
    background: var(--error);
}

.btn-apply-coupon.btn-remove:hover {
    background: #dc2626;
}

.coupon-message {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
    display: none;
}

.coupon-message:not(:empty) {
    display: block;
}

.coupon-message-success {
    background: var(--success-light);
    color: #065f46;
    border: 1px solid var(--success);
}

.coupon-message-error {
    background: var(--error-light);
    color: #991b1b;
    border: 1px solid var(--error);
}

.discount-row {
    color: var(--success);
    font-weight: 600;
}

.discount-row span:last-child {
    color: var(--success);
}

/* Responsive Design for Coupon */
@media (max-width: 768px) {
    .coupon-section {
        padding: var(--space-3);
    }
    
    .coupon-input-group {
        flex-direction: column;
    }
    
    .btn-apply-coupon {
        width: 100%;
    }
}

/* Dark Mode for Coupon */
@media (prefers-color-scheme: dark) {
    .coupon-section {
        background: var(--bg-tertiary);
        border-color: var(--border-color);
    }
    
    .coupon-message-success {
        background: rgba(16, 185, 129, 0.1);
        color: #6ee7b7;
    }
    
    .coupon-message-error {
        background: rgba(239, 68, 68, 0.1);
        color: #fca5a5;
    }
}

/* ============================================
   COUPONS POPUP MODAL
   ============================================ */
.coupons-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    animation: fadeIn 0.3s ease-out;
}

.coupons-modal.active {
    display: block;
}

.coupons-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.coupons-modal-content {
    position: relative;
    max-width: 600px;
    max-height: 80vh;
    margin: 5vh auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.coupons-modal-header {
    padding: var(--space-5);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.coupons-modal-header h3 {
    margin: 0;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.coupons-modal-header h3 i {
    color: var(--primary-color);
}

.coupons-modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    color: var(--text-secondary);
}

.coupons-modal-close:hover {
    background: var(--error);
    color: white;
    transform: rotate(90deg);
}

.coupons-modal-body {
    padding: var(--space-5);
    overflow-y: auto;
    max-height: calc(80vh - 100px);
}

.coupons-loading {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-secondary);
}

.coupons-loading i {
    font-size: 2rem;
    margin-bottom: var(--space-3);
    color: var(--primary-color);
}

.coupons-empty {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-secondary);
}

.coupons-empty i {
    font-size: 3rem;
    margin-bottom: var(--space-3);
    color: var(--gray-300);
}

.coupon-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.coupon-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-hover) 100%);
}

.coupon-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-3);
}

.coupon-card-code {
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.coupon-card-discount {
    background: var(--primary-color);
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.coupon-card-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.coupon-card-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
    line-height: 1.5;
}

.coupon-card-details {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.coupon-card-detail {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.coupon-card-detail i {
    color: var(--primary-color);
}

.coupon-card-badges {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.coupon-badge {
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.coupon-badge-limited {
    background: var(--warning-light);
    color: #92400e;
}

.coupon-badge-expiring {
    background: var(--error-light);
    color: #991b1b;
}

.coupon-card-actions {
    display: flex;
    gap: var(--space-2);
}

.btn-copy-coupon,
.btn-apply-coupon-modal {
    flex: 1;
    padding: var(--space-3);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.btn-copy-coupon {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-copy-coupon:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.btn-copy-coupon.copied {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.btn-apply-coupon-modal {
    background: var(--primary-color);
    color: white;
}

.btn-apply-coupon-modal:hover {
    background: var(--primary-hover);
}

/* Responsive Design for Modal */
@media (max-width: 768px) {
    .coupons-modal-content {
        max-width: 95%;
        margin: 2vh auto;
        max-height: 90vh;
    }
    
    .coupons-modal-header,
    .coupons-modal-body {
        padding: var(--space-4);
    }
    
    .coupon-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .btn-show-coupons {
        width: 100%;
        justify-content: center;
    }
    
    .coupon-card-header {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .coupon-card-actions {
        flex-direction: column;
    }
}

/* Dark Mode for Modal */
@media (prefers-color-scheme: dark) {
    .coupons-modal-content {
        background: var(--bg-secondary);
    }
    
    .coupon-card {
        background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    }
}