/**
 * PayrollGateway - Main Stylesheet
 * Modern Enterprise Payroll & Payment Gateway 2026
 */

/* ======================================
   CSS Variables - Modern Design System
====================================== */
:root {
    /* Colors - Primary (Electric Blue) */
    --color-primary-50: #eef2ff;
    --color-primary-100: #e0e7ff;
    --color-primary-200: #c7d2fe;
    --color-primary-300: #a5b4fc;
    --color-primary-400: #818cf8;
    --color-primary-500: #6366f1;
    --color-primary-600: #4f46e5;
    --color-primary-700: #4338ca;
    --color-primary-800: #3730a3;
    --color-primary-900: #312e81;
    
    /* Colors - Secondary (Vibrant Cyan) */
    --color-secondary-400: #22d3ee;
    --color-secondary-500: #06b6d4;
    --color-secondary-600: #0891b2;
    
    /* Colors - Accent (Crypto Gold) */
    --color-accent-400: #fbbf24;
    --color-accent-500: #f59e0b;
    --color-accent-600: #d97706;
    
    /* Colors - Success (Emerald) */
    --color-success-50: #ecfdf5;
    --color-success-100: #d1fae5;
    --color-success-400: #34d399;
    --color-success-500: #10b981;
    --color-success-600: #059669;
    --color-success-700: #047857;
    
    /* Colors - Warning */
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-500: #f59e0b;
    --color-warning-600: #d97706;
    
    /* Colors - Danger */
    --color-danger-50: #fef2f2;
    --color-danger-100: #fee2e2;
    --color-danger-400: #f87171;
    --color-danger-500: #ef4444;
    --color-danger-600: #dc2626;
    --color-danger-700: #b91c1c;
    
    /* Colors - Gray (Cool) */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-gray-950: #020617;
    
    /* Crypto Colors */
    --color-bitcoin: #f7931a;
    --color-ethereum: #627eea;
    --color-usdt: #26a17b;
    --color-usdc: #2775ca;
    --color-solana: #9945ff;
    --color-xrp: #23292f;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-secondary-500) 100%);
    --gradient-dark: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    --gradient-crypto: linear-gradient(135deg, var(--color-bitcoin) 0%, var(--color-ethereum) 50%, var(--color-solana) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --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;
    --font-size-6xl: 3.75rem;
    
    /* 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: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1rem;
}

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-4);
}

a {
    color: var(--color-primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-700);
}

/* ======================================
   Skip Link (Accessibility)
====================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-700);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    z-index: 9999;
    transition: top var(--transition-fast);
}

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

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

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: var(--spacing-6);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-gray-900);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.logo:hover {
    color: var(--color-gray-900);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-1);
}

.nav-link {
    display: block;
    padding: var(--spacing-2) var(--spacing-4);
    color: var(--color-gray-600);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-100);
}

.nav-link.active {
    color: var(--color-primary-700);
    background: var(--color-primary-50);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    transition: all var(--transition-fast);
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    gap: var(--spacing-3);
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2);
    background: none;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu-toggle:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--color-primary-600);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-name {
    font-weight: 500;
    color: var(--color-gray-700);
}

.icon-chevron {
    width: 16px;
    height: 16px;
    color: var(--color-gray-500);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-2);
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.user-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-100);
}

.dropdown-name {
    display: block;
    font-weight: 600;
    color: var(--color-gray-900);
}

.dropdown-email {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--spacing-1);
}

.dropdown-role {
    display: inline-block;
    margin-top: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-2);
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

.dropdown-menu {
    list-style: none;
    padding: var(--spacing-2) 0;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-2) var(--spacing-4);
    color: var(--color-gray-700);
    transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.dropdown-divider {
    border-top: 1px solid var(--color-gray-100);
    margin: var(--spacing-2) 0;
}

.logout-link {
    color: var(--color-danger-600) !important;
}

/* ======================================
   Buttons
====================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-weight: 500;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

.btn-primary {
    background: var(--color-primary-600);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-700);
    color: white;
}

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

.btn-secondary:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.btn-success {
    background: var(--color-success-600);
    color: white;
}

.btn-success:hover {
    background: var(--color-success-700);
    color: white;
}

.btn-danger {
    background: var(--color-danger-600);
    color: white;
}

.btn-danger:hover {
    background: var(--color-danger-700);
    color: white;
}

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

.btn-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-block {
    width: 100%;
}

/* ======================================
   Flash Messages
====================================== */
.flash-message {
    padding: var(--spacing-4) 0;
}

.flash-message .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flash-message p {
    margin: 0;
    font-weight: 500;
}

.flash-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.flash-close:hover {
    opacity: 1;
}

.flash-success {
    background: var(--color-success-50);
    color: var(--color-success-700);
}

.flash-error {
    background: var(--color-danger-50);
    color: var(--color-danger-700);
}

.flash-warning {
    background: var(--color-warning-50);
    color: var(--color-warning-600);
}

.flash-info {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
}

/* ======================================
   Cards
====================================== */
.card {
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-100);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-100);
}

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

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

.form-label .required {
    color: var(--color-danger-500);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    background: white;
    color: var(--color-gray-900);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

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

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-danger-500);
}

.form-error {
    margin-top: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-danger-600);
}

.form-help {
    margin-top: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-primary-600);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Input Group */
.input-group {
    display: flex;
}

.input-group .form-input {
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-group-append {
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-left: none;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    color: var(--color-gray-500);
}

/* ======================================
   Tables
====================================== */
.table-wrapper {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.table th {
    background: var(--color-gray-50);
    font-weight: 600;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr:hover {
    background: var(--color-gray-50);
}

/* ======================================
   Badges
====================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: currentColor;
}

.badge-success {
    background: var(--color-success-100);
    color: var(--color-success-700);
}

.badge-warning {
    background: var(--color-warning-100);
    color: var(--color-warning-600);
}

.badge-danger {
    background: var(--color-danger-100);
    color: var(--color-danger-700);
}

.badge-info {
    background: var(--color-primary-100);
    color: var(--color-primary-700);
}

.badge-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* ======================================
   Stats Cards
====================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

.stat-card {
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.stat-icon-primary {
    background: var(--color-primary-100);
    color: var(--color-primary-600);
}

.stat-icon-success {
    background: var(--color-success-100);
    color: var(--color-success-600);
}

.stat-icon-warning {
    background: var(--color-warning-100);
    color: var(--color-warning-600);
}

.stat-icon-danger {
    background: var(--color-danger-100);
    color: var(--color-danger-600);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--spacing-1);
}

.stat-change {
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-2);
}

.stat-change.positive {
    color: var(--color-success-600);
}

.stat-change.negative {
    color: var(--color-danger-600);
}

/* ======================================
   Footer
====================================== */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-16) 0 var(--spacing-8);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-12);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

.footer-logo:hover {
    color: white;
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-description {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin-bottom: var(--spacing-4);
}

.footer-contact p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-2);
}

.footer-section h3 {
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-4);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-2);
}

.footer-section ul a {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-section ul a:hover {
    color: white;
}

/* Compliance Badges */
.footer-compliance {
    padding: var(--spacing-6) 0;
    border-top: 1px solid var(--color-gray-800);
    border-bottom: 1px solid var(--color-gray-800);
    margin-bottom: var(--spacing-6);
}

.compliance-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-4);
}

.compliance-badges .badge {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-gray-300);
    padding: var(--spacing-2) var(--spacing-4);
}

.compliance-badges .badge-dot {
    background: var(--color-success-500);
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-4);
}

.social-links a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.social-links a:hover {
    color: white;
}

.social-links svg {
    width: 20px;
    height: 20px;
}

/* ======================================
   Hero Section
====================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary-800) 0%, var(--color-primary-600) 100%);
    color: white;
    padding: var(--spacing-20) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-6);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.hero .btn-primary {
    background: white;
    color: var(--color-primary-700);
}

.hero .btn-primary:hover {
    background: var(--color-gray-100);
}

.hero .btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

/* ======================================
   Features Section
====================================== */
.section {
    padding: var(--spacing-20) 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-12);
}

.section-title {
    margin-bottom: var(--spacing-4);
}

.section-subtitle {
    color: var(--color-gray-600);
    font-size: var(--font-size-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-8);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--color-primary-100);
    color: var(--color-primary-600);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin: 0 auto var(--spacing-5);
}

.feature-title {
    margin-bottom: var(--spacing-3);
}

.feature-description {
    color: var(--color-gray-600);
    margin: 0;
}

/* ======================================
   Payment Methods Section
====================================== */
.payment-methods {
    background: var(--color-gray-100);
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

.payment-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-normal);
}

.payment-card:hover {
    border-color: var(--color-primary-300);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.payment-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-4);
}

.payment-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2);
}

.payment-description {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
}

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

.payment-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2);
}

.payment-features li::before {
    content: '✓';
    color: var(--color-success-600);
    font-weight: 600;
}

/* ======================================
   Dashboard Page
====================================== */
.page-header {
    padding: var(--spacing-8) 0;
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
}

.page-title {
    margin: 0 0 var(--spacing-2);
}

.page-description {
    color: var(--color-gray-600);
    margin: 0;
}

.dashboard-content {
    padding: var(--spacing-8) 0;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-6);
}

/* ======================================
   Auth Pages
====================================== */
.auth-page {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-8) 0;
    background: linear-gradient(135deg, var(--color-primary-50) 0%, white 100%);
}

.auth-container {
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.auth-header {
    padding: var(--spacing-8) var(--spacing-8) 0;
    text-align: center;
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
    color: var(--color-gray-900);
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.auth-title {
    margin-bottom: var(--spacing-2);
}

.auth-subtitle {
    color: var(--color-gray-600);
}

.auth-body {
    padding: var(--spacing-8);
}

.auth-footer {
    padding: 0 var(--spacing-8) var(--spacing-8);
    text-align: center;
}

.auth-link {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin: var(--spacing-6) 0;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-gray-200);
}

/* ======================================
   Breadcrumbs
====================================== */
.breadcrumbs {
    padding: var(--spacing-4) 0;
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-200);
}

.breadcrumbs ol {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    list-style: none;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.breadcrumbs a {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

.breadcrumbs a:hover {
    color: var(--color-primary-600);
}

.breadcrumbs span[aria-current] {
    color: var(--color-gray-900);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.breadcrumbs .separator {
    color: var(--color-gray-400);
}

/* ======================================
   Pagination
====================================== */
.pagination {
    display: flex;
    justify-content: center;
    padding: var(--spacing-6) 0;
}

.pagination-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-1);
}

.pagination-list li a,
.pagination-list li span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-3);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pagination-list li a {
    color: var(--color-gray-700);
    background: white;
    border: 1px solid var(--color-gray-300);
}

.pagination-list li a:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

.pagination-list li span.current {
    background: var(--color-primary-600);
    color: white;
}

/* ======================================
   Loading & Spinner
====================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary-600);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ======================================
   Modal
====================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.open .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--color-gray-400);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-6);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
}

/* ======================================
   Utilities
====================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary-600); }
.text-success { color: var(--color-success-600); }
.text-warning { color: var(--color-warning-600); }
.text-danger { color: var(--color-danger-600); }
.text-muted { color: var(--color-gray-500); }

.bg-white { background: white; }
.bg-gray { background: var(--color-gray-50); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.hidden { display: none !important; }
.visible { visibility: visible !important; }

/* ======================================
   Responsive Design
====================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }
    
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-6);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        overflow-y: auto;
    }
    
    .main-nav.open {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-link {
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .auth-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .auth-buttons .btn {
        width: 100%;
    }
    
    .user-menu {
        width: 100%;
    }
    
    .user-menu-toggle {
        width: 100%;
        justify-content: flex-start;
    }
    
    .user-dropdown {
        position: static;
        box-shadow: none;
        border: 1px solid var(--color-gray-200);
        margin-top: var(--spacing-2);
    }
    
    /* Hero */
    .hero {
        padding: var(--spacing-12) 0;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
    
    /* Forms */
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        --container-padding: 1rem;
    }
    
    .card-body,
    .auth-body {
        padding: var(--spacing-4);
    }
    
    .auth-header {
        padding: var(--spacing-6) var(--spacing-4) 0;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .mobile-menu-toggle,
    .btn {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ======================================
   Modern 2026 Enhancements
====================================== */

/* Glass Morphism Cards */
.glass-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-2xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.dark-glass {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.crypto-gradient-text {
    background: var(--gradient-crypto);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Crypto Payment Cards */
.crypto-card {
    background: var(--color-gray-900);
    color: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.crypto-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-crypto);
    opacity: 0.1;
    transition: opacity var(--transition-normal);
}

.crypto-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.crypto-card:hover::before {
    opacity: 0.2;
}

.crypto-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
}

.crypto-icon-btc { background: var(--color-bitcoin); }
.crypto-icon-eth { background: var(--color-ethereum); }
.crypto-icon-usdt { background: var(--color-usdt); }
.crypto-icon-usdc { background: var(--color-usdc); }
.crypto-icon-sol { background: var(--color-solana); }
.crypto-icon-xrp { background: var(--color-xrp); color: white; }

/* Wallet Address Display */
.wallet-address {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    background: var(--color-gray-100);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3);
}

.wallet-address code {
    word-break: break-all;
}

.wallet-address .copy-btn {
    flex-shrink: 0;
    padding: var(--spacing-2);
    background: var(--color-primary-600);
    color: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.wallet-address .copy-btn:hover {
    background: var(--color-primary-700);
}

/* QR Code Container */
.qr-container {
    background: white;
    padding: var(--spacing-4);
    border-radius: var(--radius-xl);
    display: inline-block;
    box-shadow: var(--shadow-lg);
}

/* Live Price Ticker */
.price-ticker {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-gray-900);
    color: white;
    border-radius: var(--radius-lg);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
}

.price-ticker .price-change {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.price-ticker .price-up {
    color: var(--color-success-400);
}

.price-ticker .price-down {
    color: var(--color-danger-400);
}

/* Animated Background */
.animated-bg {
    position: relative;
    overflow: hidden;
}

.animated-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--color-primary-400) 0%, transparent 50%);
    animation: pulse-bg 15s ease-in-out infinite;
    opacity: 0.1;
}

@keyframes pulse-bg {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(25%, 25%) scale(1.2); }
}

/* Floating Elements Animation */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.floating {
    animation: float 3s ease-in-out infinite;
}

/* Glow Effects */
.glow-primary {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.glow-success {
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

.glow-crypto {
    box-shadow: 0 0 30px rgba(247, 147, 26, 0.3),
                0 0 60px rgba(98, 126, 234, 0.2);
}

/* Modern Stats Cards */
.stat-card-modern {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-6);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-normal);
}

.stat-card-modern::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    opacity: 0.1;
    border-radius: 0 var(--radius-2xl) 0 100%;
}

.stat-card-modern:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Payment Type Selector Modern */
.payment-type-modern {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-3);
}

.payment-type-modern label {
    cursor: pointer;
}

.payment-type-modern input[type="radio"] {
    display: none;
}

.payment-type-modern .option-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4);
    background: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.payment-type-modern input:checked + .option-card {
    background: var(--color-primary-50);
    border-color: var(--color-primary-600);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.payment-type-modern .option-card:hover {
    border-color: var(--color-primary-400);
}

.payment-type-modern .option-icon {
    font-size: 28px;
}

.payment-type-modern .option-label {
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

/* Crypto-specific Payment Option */
.payment-type-modern .crypto-option .option-card {
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    border-color: var(--color-gray-700);
    color: white;
}

.payment-type-modern .crypto-option .option-label {
    color: white;
}

.payment-type-modern .crypto-option input:checked + .option-card {
    background: linear-gradient(135deg, var(--color-gray-800) 0%, var(--color-gray-900) 100%);
    border-color: var(--color-bitcoin);
    box-shadow: 0 0 0 4px rgba(247, 147, 26, 0.2);
}

/* Cryptocurrency Selector */
.crypto-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-2);
}

.crypto-selector label {
    cursor: pointer;
}

.crypto-selector input[type="radio"] {
    display: none;
}

.crypto-selector .crypto-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-3);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.crypto-selector input:checked + .crypto-option {
    background: white;
    border-color: currentColor;
    box-shadow: var(--shadow-md);
}

.crypto-selector .btc { color: var(--color-bitcoin); }
.crypto-selector .eth { color: var(--color-ethereum); }
.crypto-selector .usdt { color: var(--color-usdt); }
.crypto-selector .usdc { color: var(--color-usdc); }
.crypto-selector .sol { color: var(--color-solana); }
.crypto-selector .xrp { color: var(--color-xrp); }

/* Transaction Timeline */
.transaction-timeline {
    position: relative;
    padding-left: var(--spacing-8);
}

.transaction-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-gray-200);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-6);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--spacing-8) + 8px);
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary-600);
    border: 2px solid white;
    box-shadow: 0 0 0 2px var(--color-primary-200);
}

.timeline-item.completed::before {
    background: var(--color-success-500);
    box-shadow: 0 0 0 2px var(--color-success-200);
}

.timeline-item.pending::before {
    background: var(--color-warning-500);
    box-shadow: 0 0 0 2px var(--color-warning-200);
    animation: pulse 2s infinite;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-gray-200) 0%,
        var(--color-gray-100) 50%,
        var(--color-gray-200) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

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

/* Modern Hero */
.hero-modern {
    background: var(--gradient-dark);
    color: white;
    padding: var(--spacing-20) 0;
    position: relative;
    overflow: hidden;
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(6, 182, 212, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero-modern .hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero-modern .hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-gray-300);
    max-width: 600px;
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Notification Badge */
.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 18px;
    height: 18px;
    background: var(--color-danger-500);
    color: white;
    font-size: 10px;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
}

/* Feature Badge */
.feature-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--gradient-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Dark Mode Toggle (prep) */
.dark-mode-toggle {
    width: 48px;
    height: 24px;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    position: relative;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dark-mode-toggle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.dark-mode-toggle.active {
    background: var(--color-primary-600);
}

.dark-mode-toggle.active::after {
    transform: translateX(24px);
}