/**
 * ============================================================================
 * Buy Portal - Design System
 * ============================================================================
 * 
 * Clean, minimal design inspired by Linear, Stripe, and Apple.
 * Mobile-first, desktop-enhanced.
 * 
 * ============================================================================
 */

/* ============================================================================
   CSS Variables - Design Tokens
   ============================================================================ */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-primary-bg: #eef2ff;
    
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-error: #ef4444;
    --color-error-bg: #fef2f2;
    
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    --color-white: #ffffff;
    --color-black: #000000;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-sm: 640px;
    --container-md: 768px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
}

.buy-body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   Header
   ============================================================================ */
.buy-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
}

.buy-header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.buy-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    text-decoration: none;
    color: var(--color-gray-900);
}

.buy-logo-icon {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.buy-logo-text {
    font-weight: 600;
    font-size: var(--font-size-xl);
}

/* Progress Indicator */
.buy-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.buy-progress-steps {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.buy-progress-step {
    position: relative;
}

.buy-progress-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    width: var(--spacing-2);
    height: 2px;
    background: var(--color-gray-300);
}

.buy-progress-step.completed:not(:last-child)::after {
    background: var(--color-primary);
}

.buy-progress-dot {
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-gray-300);
    transition: var(--transition-base);
}

.buy-progress-step.completed .buy-progress-dot {
    background: var(--color-primary);
}

.buy-progress-step.active .buy-progress-dot {
    background: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-bg);
}

.buy-progress-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    display: none;
}

@media (min-width: 640px) {
    .buy-progress-text {
        display: block;
    }
}

/* Help Button */
.buy-help-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-gray-100);
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    cursor: pointer;
    transition: var(--transition-base);
}

.buy-help-btn:hover {
    background: var(--color-gray-200);
}

.buy-help-btn svg {
    width: 18px;
    height: 18px;
}

.buy-help-btn span {
    display: none;
}

@media (min-width: 640px) {
    .buy-help-btn span {
        display: inline;
    }
}

/* ============================================================================
   Main Content
   ============================================================================ */
.buy-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.buy-container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-6);
}

.buy-container-sm {
    max-width: var(--container-sm);
}

.buy-container-md {
    max-width: var(--container-md);
}

/* ============================================================================
   Industry Selection (Screen 1)
   ============================================================================ */
.buy-hero {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-6);
}

.buy-hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
    .buy-hero-title {
        font-size: var(--font-size-4xl);
    }
}

.buy-hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* Industry Grid */
.buy-industry-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-4);
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-6) var(--spacing-12);
}

@media (min-width: 640px) {
    .buy-industry-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .buy-industry-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.buy-industry-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-8) var(--spacing-6);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    color: inherit;
    position: relative;
}

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

.buy-industry-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.buy-industry-card.disabled:hover {
    transform: none;
    border-color: var(--color-gray-200);
    box-shadow: none;
}

.buy-industry-icon {
    width: 64px;
    height: 64px;
    background: var(--color-primary-bg);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
    font-size: 28px;
}

.buy-industry-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.buy-industry-count {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.buy-industry-badge {
    position: absolute;
    top: var(--spacing-3);
    right: var(--spacing-3);
    padding: var(--spacing-1) var(--spacing-2);
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

/* ============================================================================
   Quiz (Screen 2)
   ============================================================================ */
.buy-quiz {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-8) var(--spacing-6);
}

.buy-quiz-container {
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.buy-quiz-question {
    margin-bottom: var(--spacing-8);
}

.buy-quiz-number {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-2);
}

.buy-quiz-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

@media (min-width: 768px) {
    .buy-quiz-title {
        font-size: var(--font-size-3xl);
    }
}

.buy-quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.buy-quiz-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-5) var(--spacing-6);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.buy-quiz-option:hover {
    border-color: var(--color-primary-light);
    background: var(--color-primary-bg);
}

.buy-quiz-option.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.buy-quiz-option-key {
    width: 32px;
    height: 32px;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    flex-shrink: 0;
}

.buy-quiz-option.selected .buy-quiz-option-key {
    background: var(--color-primary);
    color: var(--color-white);
}

.buy-quiz-option-text {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
}

.buy-quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-8);
}

/* ============================================================================
   Plans (Screen 3)
   ============================================================================ */
.buy-plans-header {
    text-align: center;
    padding: var(--spacing-10) var(--spacing-6) var(--spacing-8);
}

.buy-plans-recommendation {
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-2);
}

.buy-plans-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.buy-plans-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-6);
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-6) var(--spacing-12);
}

@media (min-width: 768px) {
    .buy-plans-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.buy-plan-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    position: relative;
    transition: var(--transition-base);
}

.buy-plan-card:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-lg);
}

.buy-plan-card.recommended {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

.buy-plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-1) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.buy-plan-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.buy-plan-description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-6);
}

.buy-plan-price {
    margin-bottom: var(--spacing-6);
}

.buy-plan-price-amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.buy-plan-price-period {
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
}

.buy-plan-features {
    list-style: none;
    margin-bottom: var(--spacing-8);
}

.buy-plan-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-2) 0;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.buy-plan-feature svg {
    width: 18px;
    height: 18px;
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

.buy-plan-feature.disabled {
    color: var(--color-gray-400);
}

.buy-plan-feature.disabled svg {
    color: var(--color-gray-300);
}

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

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

.buy-btn-primary:hover {
    background: var(--color-primary-dark);
}

.buy-btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}

.buy-btn-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

.buy-btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.buy-btn-full {
    width: 100%;
}

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

/* ============================================================================
   Cart (Screen 5)
   ============================================================================ */
.buy-cart {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-8) var(--spacing-6);
}

.buy-cart-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-6);
}

.buy-cart-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.buy-cart-section {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-100);
}

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

.buy-cart-section-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-4);
}

.buy-cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-3) 0;
}

.buy-cart-item-name {
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
}

.buy-cart-item-price {
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
    font-weight: 500;
}

.buy-cart-item.included .buy-cart-item-price {
    color: var(--color-gray-400);
    font-weight: 400;
}

.buy-cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-gray-50);
}

.buy-cart-total-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
}

.buy-cart-total-amount {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.buy-cart-actions {
    display: flex;
    gap: var(--spacing-4);
    margin-top: var(--spacing-6);
}

/* ============================================================================
   Forms
   ============================================================================ */
.buy-form-group {
    margin-bottom: var(--spacing-5);
}

.buy-form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.buy-form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

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

.buy-form-input::placeholder {
    color: var(--color-gray-400);
}

.buy-form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
}

@media (min-width: 640px) {
    .buy-form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.buy-form-row-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ============================================================================
   Footer
   ============================================================================ */
.buy-footer {
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
    padding: var(--spacing-8) var(--spacing-6);
}

.buy-footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    text-align: center;
}

.buy-footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-4);
    flex-wrap: wrap;
}

.buy-footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    text-decoration: none;
    transition: var(--transition-base);
}

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

.buy-footer-trust {
    display: flex;
    justify-content: center;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

.buy-trust-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.buy-trust-badge svg {
    color: var(--color-success);
}

.buy-footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

/* ============================================================================
   Modal
   ============================================================================ */
.buy-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-6);
}

.buy-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.buy-modal-content {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-xl);
}

.buy-modal-close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    width: 32px;
    height: 32px;
    background: var(--color-gray-100);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-500);
}

.buy-modal-close:hover {
    background: var(--color-gray-200);
}

.buy-modal h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2);
}

.buy-modal p {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-6);
}

.buy-help-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.buy-help-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

.buy-help-option:hover {
    background: var(--color-gray-100);
}

.buy-help-option svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.buy-help-option span {
    font-weight: 600;
    display: block;
}

.buy-help-option small {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

/* ============================================================================
   Utilities
   ============================================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.hidden { display: none; }

/* ============================================================================
   Animations
   ============================================================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* ============================================================================
   Invoice & Renewal Screens
   ============================================================================ */
.buy-invoice {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-8) var(--spacing-6);
}

.buy-invoice-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.buy-invoice-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-100);
}

.buy-invoice-logo {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-2);
}

.buy-invoice-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.buy-invoice-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    background: var(--color-gray-50);
}

.buy-invoice-meta-item label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.buy-invoice-meta-item span {
    display: block;
    font-weight: 500;
    color: var(--color-gray-900);
}

.buy-invoice-items {
    padding: var(--spacing-6);
}

.buy-invoice-table {
    width: 100%;
    border-collapse: collapse;
}

.buy-invoice-table th,
.buy-invoice-table td {
    padding: var(--spacing-3);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-100);
}

.buy-invoice-table th {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-500);
}

.buy-invoice-table td {
    color: var(--color-gray-700);
}

.buy-invoice-table .text-right {
    text-align: right;
}

.buy-invoice-actions {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    border-top: 1px solid var(--color-gray-100);
}

/* Success Page */
.buy-success {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-8) var(--spacing-6);
}

.buy-success-icon {
    width: 80px;
    height: 80px;
    background: var(--color-success-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
}

.buy-success-icon svg {
    width: 40px;
    height: 40px;
    color: var(--color-success);
}

.buy-success-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.buy-success-message {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 500px;
    margin-bottom: var(--spacing-8);
}

/* Locations Input */
.buy-locations-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
}

.buy-locations-input label {
    font-weight: 500;
    color: var(--color-gray-700);
}

.buy-locations-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.buy-locations-btn {
    width: 36px;
    height: 36px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.buy-locations-btn:hover {
    background: var(--color-gray-100);
}

.buy-locations-value {
    font-size: var(--font-size-xl);
    font-weight: 600;
    min-width: 40px;
    text-align: center;
}

/* Loading spinner */
.buy-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-12);
}

.buy-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================================
   Toast Notifications
   ============================================================================ */
.buy-toast-container {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    max-width: 400px;
}

@media (max-width: 640px) {
    .buy-toast-container {
        left: var(--spacing-4);
        right: var(--spacing-4);
        max-width: none;
    }
}

.buy-toast {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-gray-400);
    animation: slideIn 0.3s ease-out;
}

.buy-toast.success {
    border-left-color: var(--color-success);
}

.buy-toast.error {
    border-left-color: var(--color-error);
}

.buy-toast.warning {
    border-left-color: var(--color-warning);
}

.buy-toast.info {
    border-left-color: var(--color-primary);
}

.buy-toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.buy-toast.success .buy-toast-icon { color: var(--color-success); }
.buy-toast.error .buy-toast-icon { color: var(--color-error); }
.buy-toast.warning .buy-toast-icon { color: var(--color-warning); }
.buy-toast.info .buy-toast-icon { color: var(--color-primary); }

.buy-toast-content {
    flex: 1;
}

.buy-toast-title {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.buy-toast-message {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.buy-toast-close {
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.buy-toast-close:hover {
    color: var(--color-gray-600);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.buy-toast.hiding {
    animation: slideOut 0.3s ease-in forwards;
}

/* ============================================================================
   Loading Overlay
   ============================================================================ */
.buy-loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.buy-loading-overlay .buy-spinner {
    width: 48px;
    height: 48px;
}

.buy-loading-text {
    margin-top: var(--spacing-4);
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
}

/* ============================================================================
   Button Loading State
   ============================================================================ */
.buy-btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.buy-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.buy-btn-primary.loading::after {
    border-top-color: var(--color-white);
}

/* ============================================================================
   Form Error States
   ============================================================================ */
.buy-form-input.error {
    border-color: var(--color-error);
    background: var(--color-error-bg);
}

.buy-form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.buy-form-error {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

.buy-form-error svg {
    width: 16px;
    height: 16px;
}

/* ============================================================================
   Empty & Error States
   ============================================================================ */
.buy-empty-state {
    text-align: center;
    padding: var(--spacing-16) var(--spacing-6);
}

.buy-empty-icon {
    width: 80px;
    height: 80px;
    background: var(--color-gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-6);
}

.buy-empty-icon svg {
    width: 40px;
    height: 40px;
    color: var(--color-gray-400);
}

.buy-empty-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.buy-empty-message {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-6);
}

/* ============================================================================
   Mobile Optimizations
   ============================================================================ */
@media (max-width: 640px) {
    :root {
        --font-size-3xl: 1.5rem;
        --font-size-4xl: 1.875rem;
        --spacing-8: 1.5rem;
        --spacing-12: 2.5rem;
    }
    
    .buy-header-inner {
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .buy-logo-text {
        display: none;
    }
    
    .buy-container {
        padding: var(--spacing-4);
    }
    
    .buy-hero {
        padding: var(--spacing-8) var(--spacing-4);
    }
    
    .buy-hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .buy-industry-grid {
        padding: 0 var(--spacing-4) var(--spacing-8);
    }
    
    .buy-industry-card {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .buy-industry-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
    
    .buy-quiz {
        padding: var(--spacing-6) var(--spacing-4);
        min-height: 60vh;
    }
    
    .buy-quiz-title {
        font-size: var(--font-size-xl);
    }
    
    .buy-quiz-option {
        padding: var(--spacing-4);
        gap: var(--spacing-3);
    }
    
    .buy-quiz-option-text {
        font-size: var(--font-size-base);
    }
    
    .buy-quiz-nav {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .buy-quiz-nav .buy-btn {
        width: 100%;
    }
    
    .buy-plans-header {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .buy-plans-title {
        font-size: var(--font-size-2xl);
    }
    
    .buy-plans-grid {
        padding: 0 var(--spacing-4) var(--spacing-8);
        gap: var(--spacing-4);
    }
    
    .buy-plan-card {
        padding: var(--spacing-6);
    }
    
    .buy-plan-price-amount {
        font-size: var(--font-size-3xl);
    }
    
    .buy-cart {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .buy-cart-actions {
        flex-direction: column;
    }
    
    .buy-invoice {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .buy-invoice-meta {
        grid-template-columns: 1fr;
    }
    
    .buy-invoice-actions {
        flex-direction: column;
    }
    
    .buy-success {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .buy-success-title {
        font-size: var(--font-size-2xl);
    }
    
    .buy-footer-links {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .buy-footer-trust {
        flex-direction: column;
        gap: var(--spacing-3);
    }
}

/* ============================================================================
   Print Styles
   ============================================================================ */
@media print {
    .buy-header,
    .buy-footer,
    .buy-help-btn,
    .buy-btn,
    .buy-toast-container {
        display: none !important;
    }
    
    .buy-invoice-card {
        border: none;
        box-shadow: none;
    }
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
    outline: none;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-primary);
    color: var(--color-white);
    z-index: 9999;
}

.skip-link:focus {
    top: 0;
}

/* ============================================================================
   Floating Help Button (FAB)
   ============================================================================ */
.buy-help-fab {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 900;
    transition: var(--transition-base);
}

.buy-help-fab:hover {
    background: var(--color-primary-dark);
    transform: scale(1.05);
}

.buy-help-fab:active {
    transform: scale(0.95);
}

@media (max-width: 640px) {
    .buy-help-fab {
        bottom: var(--spacing-4);
        right: var(--spacing-4);
        width: 48px;
        height: 48px;
    }
    
    .buy-help-fab svg {
        width: 20px;
        height: 20px;
    }
}

/* Hide FAB on desktop when header help button is visible */
@media (min-width: 768px) {
    .buy-help-fab {
        display: none;
    }
}

/* ============================================================================
   Status Badges
   ============================================================================ */
.buy-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.buy-badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.buy-badge-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.buy-badge-error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.buy-badge-info {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

/* ============================================================================
   Skeleton Loading
   ============================================================================ */
.buy-skeleton {
    background: linear-gradient(
        90deg,
        var(--color-gray-100) 25%,
        var(--color-gray-200) 50%,
        var(--color-gray-100) 75%
    );
    background-size: 200% 100%;
    animation: skeleton 1.5s infinite;
    border-radius: var(--radius-md);
}

.buy-skeleton-text {
    height: 1em;
    width: 100%;
}

.buy-skeleton-title {
    height: 1.5em;
    width: 60%;
}

.buy-skeleton-card {
    height: 200px;
}

@keyframes skeleton {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ============================================================================
   Promo Code Input
   ============================================================================ */
.buy-promo-input {
    display: flex;
    gap: var(--spacing-2);
    margin-top: var(--spacing-4);
}

.buy-promo-input input {
    flex: 1;
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.buy-promo-input button {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.buy-promo-input button:hover {
    background: var(--color-gray-200);
}

/* ============================================================================
   Addon Cards
   ============================================================================ */
.buy-addon-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

@media (min-width: 640px) {
    .buy-addon-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.buy-addon-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.buy-addon-card:hover {
    border-color: var(--color-gray-300);
}

.buy-addon-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.buy-addon-checkbox {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-base);
}

.buy-addon-card.selected .buy-addon-checkbox {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.buy-addon-content {
    flex: 1;
}

.buy-addon-name {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-1);
}

.buy-addon-description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-2);
}

.buy-addon-price {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
}