/**
 * JKR eShop System - Advanced Design System
 *
 * Modern design system with advanced components, animations,
 * micro-interactions, accessibility features, and comprehensive
 * component library built on design tokens and modern CSS
 *
 * @package JKR_eShop_System
 * @version 4.0.0
 * @author KKCSI
 * @since 2024
 */

/* ==========================================================================
   DESIGN TOKENS - SEMANTIC NAMING SYSTEM
   ========================================================================== */

:root {
    /* Color System - Semantic */
    --jkr-color-primary: #0073aa;
    --jkr-color-primary-hover: #005177;
    --jkr-color-primary-light: #e6f3ff;
    --jkr-color-primary-dark: #004964;
    
    --jkr-color-secondary: #646970;
    --jkr-color-secondary-hover: #50575e;
    --jkr-color-secondary-light: #f6f7f7;
    --jkr-color-secondary-dark: #3c434a;
    
    --jkr-color-success: #00a32a;
    --jkr-color-success-hover: #008a20;
    --jkr-color-success-light: #e6f7e6;
    --jkr-color-success-dark: #007017;
    
    --jkr-color-warning: #dba617;
    --jkr-color-warning-hover: #c7950f;
    --jkr-color-warning-light: #fff8e1;
    --jkr-color-warning-dark: #b8860b;
    
    --jkr-color-danger: #d63638;
    --jkr-color-danger-hover: #b32d2f;
    --jkr-color-danger-light: #fde8e8;
    --jkr-color-danger-dark: #991b1b;
    
    --jkr-color-info: #72aee6;
    --jkr-color-info-hover: #4f94d4;
    --jkr-color-info-light: #e8f4fd;
    --jkr-color-info-dark: #1e40af;
    
    /* Neutral Colors */
    --jkr-color-white: #ffffff;
    --jkr-color-gray-50: #f9fafb;
    --jkr-color-gray-100: #f3f4f6;
    --jkr-color-gray-200: #e5e7eb;
    --jkr-color-gray-300: #d1d5db;
    --jkr-color-gray-400: #9ca3af;
    --jkr-color-gray-500: #6b7280;
    --jkr-color-gray-600: #4b5563;
    --jkr-color-gray-700: #374151;
    --jkr-color-gray-800: #1f2937;
    --jkr-color-gray-900: #111827;
    --jkr-color-black: #000000;
    
    /* Typography Scale */
    --jkr-font-size-xs: 0.75rem;      /* 12px */
    --jkr-font-size-sm: 0.875rem;     /* 14px */
    --jkr-font-size-base: 1rem;       /* 16px */
    --jkr-font-size-lg: 1.125rem;     /* 18px */
    --jkr-font-size-xl: 1.25rem;      /* 20px */
    --jkr-font-size-2xl: 1.5rem;      /* 24px */
    --jkr-font-size-3xl: 1.875rem;    /* 30px */
    --jkr-font-size-4xl: 2.25rem;     /* 36px */
    --jkr-font-size-5xl: 3rem;        /* 48px */
    
    /* Font Weights */
    --jkr-font-weight-light: 300;
    --jkr-font-weight-normal: 400;
    --jkr-font-weight-medium: 500;
    --jkr-font-weight-semibold: 600;
    --jkr-font-weight-bold: 700;
    --jkr-font-weight-extrabold: 800;
    
    /* Line Heights */
    --jkr-line-height-tight: 1.25;
    --jkr-line-height-snug: 1.375;
    --jkr-line-height-normal: 1.5;
    --jkr-line-height-relaxed: 1.625;
    --jkr-line-height-loose: 2;
    
    /* Spacing Scale */
    --jkr-space-px: 1px;
    --jkr-space-0: 0;
    --jkr-space-1: 0.25rem;   /* 4px */
    --jkr-space-2: 0.5rem;    /* 8px */
    --jkr-space-3: 0.75rem;   /* 12px */
    --jkr-space-4: 1rem;      /* 16px */
    --jkr-space-5: 1.25rem;   /* 20px */
    --jkr-space-6: 1.5rem;    /* 24px */
    --jkr-space-8: 2rem;      /* 32px */
    --jkr-space-10: 2.5rem;   /* 40px */
    --jkr-space-12: 3rem;     /* 48px */
    --jkr-space-16: 4rem;     /* 64px */
    --jkr-space-20: 5rem;     /* 80px */
    --jkr-space-24: 6rem;     /* 96px */
    
    /* Border Radius */
    --jkr-radius-none: 0;
    --jkr-radius-sm: 0.125rem;  /* 2px */
    --jkr-radius-base: 0.25rem; /* 4px */
    --jkr-radius-md: 0.375rem;  /* 6px */
    --jkr-radius-lg: 0.5rem;    /* 8px */
    --jkr-radius-xl: 0.75rem;   /* 12px */
    --jkr-radius-2xl: 1rem;     /* 16px */
    --jkr-radius-3xl: 1.5rem;   /* 24px */
    --jkr-radius-full: 9999px;
    
    /* Shadows */
    --jkr-shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --jkr-shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --jkr-shadow-base: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --jkr-shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --jkr-shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --jkr-shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --jkr-shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --jkr-shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    
    /* Transitions */
    --jkr-transition-fast: 150ms;
    --jkr-transition-base: 200ms;
    --jkr-transition-slow: 300ms;
    --jkr-transition-slower: 500ms;
    
    /* Z-Index Scale */
    --jkr-z-0: 0;
    --jkr-z-10: 10;
    --jkr-z-20: 20;
    --jkr-z-30: 30;
    --jkr-z-40: 40;
    --jkr-z-50: 50;
    --jkr-z-dropdown: 1000;
    --jkr-z-sticky: 1020;
    --jkr-z-fixed: 1030;
    --jkr-z-modal-backdrop: 1040;
    --jkr-z-modal: 1050;
    --jkr-z-popover: 1060;
    --jkr-z-tooltip: 1070;
    --jkr-z-toast: 1080;
    
    /* Container Sizes */
    --jkr-container-xs: 20rem;     /* 320px */
    --jkr-container-sm: 24rem;     /* 384px */
    --jkr-container-md: 28rem;     /* 448px */
    --jkr-container-lg: 32rem;     /* 512px */
    --jkr-container-xl: 36rem;     /* 576px */
    --jkr-container-2xl: 42rem;    /* 672px */
    --jkr-container-3xl: 48rem;    /* 768px */
    --jkr-container-4xl: 56rem;    /* 896px */
    --jkr-container-5xl: 64rem;    /* 1024px */
    --jkr-container-6xl: 72rem;    /* 1152px */
    --jkr-container-7xl: 80rem;    /* 1280px */
    
    /* Animation Curves */
    --jkr-ease-linear: cubic-bezier(0, 0, 1, 1);
    --jkr-ease-in: cubic-bezier(0.4, 0, 1, 1);
    --jkr-ease-out: cubic-bezier(0, 0, 0.2, 1);
    --jkr-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --jkr-ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --jkr-ease-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Focus Ring */
    --jkr-focus-ring: 0 0 0 3px var(--jkr-color-primary-light);
    --jkr-focus-ring-danger: 0 0 0 3px var(--jkr-color-danger-light);
    --jkr-focus-ring-success: 0 0 0 3px var(--jkr-color-success-light);
}

/* Dark Mode Support */
[data-theme="dark"] {
    --jkr-color-white: #1f2937;
    --jkr-color-gray-50: #374151;
    --jkr-color-gray-100: #4b5563;
    --jkr-color-gray-200: #6b7280;
    --jkr-color-gray-300: #9ca3af;
    --jkr-color-gray-400: #d1d5db;
    --jkr-color-gray-500: #e5e7eb;
    --jkr-color-gray-600: #f3f4f6;
    --jkr-color-gray-700: #f9fafb;
    --jkr-color-gray-800: #ffffff;
    --jkr-color-gray-900: #ffffff;
    --jkr-color-black: #ffffff;
}

/* ==========================================================================
   ADVANCED COMPONENTS
   ========================================================================== */

/* Enhanced Button System */
.jkr-btn-group {
    display: inline-flex;
    border-radius: var(--jkr-radius-md);
    box-shadow: var(--jkr-shadow-sm);
    overflow: hidden;
}

.jkr-btn-group .jkr-btn {
    border-radius: 0;
    border-right-width: 0;
    position: relative;
    z-index: 1;
}

.jkr-btn-group .jkr-btn:first-child {
    border-top-left-radius: var(--jkr-radius-md);
    border-bottom-left-radius: var(--jkr-radius-md);
}

.jkr-btn-group .jkr-btn:last-child {
    border-top-right-radius: var(--jkr-radius-md);
    border-bottom-right-radius: var(--jkr-radius-md);
    border-right-width: 1px;
}

.jkr-btn-group .jkr-btn:hover,
.jkr-btn-group .jkr-btn:focus {
    z-index: 2;
}

/* Floating Action Button */
.jkr-fab {
    position: fixed;
    bottom: var(--jkr-space-6);
    right: var(--jkr-space-6);
    width: 56px;
    height: 56px;
    border-radius: var(--jkr-radius-full);
    background-color: var(--jkr-color-primary);
    color: var(--jkr-color-white);
    border: none;
    box-shadow: var(--jkr-shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--jkr-transition-base) ease;
    z-index: var(--jkr-z-fixed);
}

.jkr-fab:hover {
    background-color: var(--jkr-color-primary-hover);
    transform: scale(1.1);
    box-shadow: var(--jkr-shadow-xl);
}

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

/* Advanced Card Variations */
.jkr-card-elevated {
    box-shadow: var(--jkr-shadow-lg);
    transition: all var(--jkr-transition-base) ease;
}

.jkr-card-elevated:hover {
    transform: translateY(-4px);
    box-shadow: var(--jkr-shadow-xl);
}

.jkr-card-interactive {
    cursor: pointer;
    transition: all var(--jkr-transition-base) ease;
}

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

.jkr-card-gradient {
    background: linear-gradient(135deg, var(--jkr-color-primary-light) 0%, var(--jkr-color-white) 100%);
    border: 1px solid var(--jkr-color-primary);
}

/* Progress Components */
.jkr-progress {
    width: 100%;
    height: 8px;
    background-color: var(--jkr-color-gray-200);
    border-radius: var(--jkr-radius-full);
    overflow: hidden;
    position: relative;
}

.jkr-progress-bar {
    height: 100%;
    background-color: var(--jkr-color-primary);
    border-radius: var(--jkr-radius-full);
    transition: width var(--jkr-transition-slow) ease;
    position: relative;
    overflow: hidden;
}

.jkr-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 1rem 1rem;
    animation: jkr-progress-stripes 1s linear infinite;
}

@keyframes jkr-progress-stripes {
    0% {
        background-position: 1rem 0;
    }
    100% {
        background-position: 0 0;
    }
}

.jkr-progress-sm {
    height: 4px;
}

.jkr-progress-lg {
    height: 12px;
}

.jkr-progress-xl {
    height: 16px;
}

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

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

.jkr-skeleton-text {
    height: 1rem;
    margin-bottom: var(--jkr-space-2);
}

.jkr-skeleton-text:last-child {
    margin-bottom: 0;
    width: 60%;
}

.jkr-skeleton-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--jkr-radius-full);
}

.jkr-skeleton-button {
    height: 2.5rem;
    width: 5rem;
    border-radius: var(--jkr-radius-md);
}

/* Advanced Modal System */
.jkr-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--jkr-z-modal-backdrop);
    opacity: 0;
    transition: opacity var(--jkr-transition-base) ease;
}

.jkr-modal-overlay.active {
    opacity: 1;
}

.jkr-modal-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--jkr-z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--jkr-space-4);
}

.jkr-modal-content {
    background-color: var(--jkr-color-white);
    border-radius: var(--jkr-radius-lg);
    box-shadow: var(--jkr-shadow-2xl);
    max-width: 32rem;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(20px);
    opacity: 0;
    transition: all var(--jkr-transition-base) ease;
}

.jkr-modal-content.active {
    transform: scale(1) translateY(0);
    opacity: 1;
}

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

.jkr-modal-title {
    font-size: var(--jkr-font-size-lg);
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    margin: 0;
}

.jkr-modal-close {
    background: none;
    border: none;
    font-size: var(--jkr-font-size-xl);
    color: var(--jkr-color-gray-400);
    cursor: pointer;
    padding: var(--jkr-space-2);
    border-radius: var(--jkr-radius-base);
    transition: all var(--jkr-transition-fast) ease;
}

.jkr-modal-close:hover {
    color: var(--jkr-color-gray-600);
    background-color: var(--jkr-color-gray-100);
}

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

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

/* Toast Notifications */
.jkr-toast-container {
    position: fixed;
    top: var(--jkr-space-6);
    right: var(--jkr-space-6);
    z-index: var(--jkr-z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--jkr-space-3);
    max-width: 24rem;
}

.jkr-toast {
    background-color: var(--jkr-color-white);
    border-radius: var(--jkr-radius-lg);
    box-shadow: var(--jkr-shadow-lg);
    padding: var(--jkr-space-4);
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--jkr-transition-base) ease;
    position: relative;
    overflow: hidden;
}

.jkr-toast.show {
    transform: translateX(0);
    opacity: 1;
}

.jkr-toast.hide {
    transform: translateX(100%);
    opacity: 0;
}

.jkr-toast-success {
}

.jkr-toast-warning {
}

.jkr-toast-error {
}

.jkr-toast-info {
}

.jkr-toast-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--jkr-space-2);
}

.jkr-toast-title {
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    font-size: var(--jkr-font-size-sm);
    margin: 0;
}

.jkr-toast-close {
    background: none;
    border: none;
    color: var(--jkr-color-gray-400);
    cursor: pointer;
    padding: 0;
    font-size: var(--jkr-font-size-lg);
    line-height: 1;
    transition: color var(--jkr-transition-fast) ease;
}

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

.jkr-toast-body {
    color: var(--jkr-color-gray-600);
    font-size: var(--jkr-font-size-sm);
    line-height: var(--jkr-line-height-relaxed);
}

.jkr-toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: var(--jkr-color-primary);
    transition: width linear;
}

.jkr-toast-success .jkr-toast-progress {
    background-color: var(--jkr-color-success);
}

.jkr-toast-warning .jkr-toast-progress {
    background-color: var(--jkr-color-warning);
}

.jkr-toast-error .jkr-toast-progress {
    background-color: var(--jkr-color-danger);
}

.jkr-toast-info .jkr-toast-progress {
    background-color: var(--jkr-color-info);
}

/* Tooltip System */
.jkr-tooltip {
    position: relative;
    display: inline-block;
}

.jkr-tooltip-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    z-index: var(--jkr-z-tooltip);
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--jkr-color-gray-900);
    color: var(--jkr-color-white);
    text-align: center;
    padding: var(--jkr-space-2) var(--jkr-space-3);
    border-radius: var(--jkr-radius-md);
    font-size: var(--jkr-font-size-sm);
    white-space: nowrap;
    transition: all var(--jkr-transition-fast) ease;
    pointer-events: none;
}

.jkr-tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--jkr-color-gray-900) transparent transparent transparent;
}

.jkr-tooltip:hover .jkr-tooltip-content {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(-8px);
}

/* Dropdown Menu */
.jkr-dropdown {
    position: relative;
    display: inline-block;
}

.jkr-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--jkr-z-dropdown);
    background-color: var(--jkr-color-white);
    border: 1px solid var(--jkr-color-gray-200);
    border-radius: var(--jkr-radius-lg);
    box-shadow: var(--jkr-shadow-lg);
    min-width: 12rem;
    padding: var(--jkr-space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--jkr-transition-fast) ease;
}

.jkr-dropdown.active .jkr-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.jkr-dropdown-item {
    display: block;
    width: 100%;
    padding: var(--jkr-space-2) var(--jkr-space-3);
    color: var(--jkr-color-gray-700);
    text-decoration: none;
    border-radius: var(--jkr-radius-base);
    transition: all var(--jkr-transition-fast) ease;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-size: var(--jkr-font-size-sm);
}

.jkr-dropdown-item:hover {
    background-color: var(--jkr-color-gray-100);
    color: var(--jkr-color-gray-900);
}

.jkr-dropdown-divider {
    height: 1px;
    background-color: var(--jkr-color-gray-200);
    margin: var(--jkr-space-2) 0;
}

/* Tabs System */
.jkr-tabs {
    width: 100%;
}

.jkr-tab-list {
    display: flex;
    border-bottom: 1px solid var(--jkr-color-gray-200);
    margin-bottom: var(--jkr-space-6);
}

.jkr-tab-button {
    padding: var(--jkr-space-3) var(--jkr-space-4);
    border: none;
    background: none;
    color: var(--jkr-color-gray-600);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--jkr-transition-fast) ease;
    font-size: var(--jkr-font-size-sm);
    font-weight: var(--jkr-font-weight-medium);
    position: relative;
}

.jkr-tab-button:hover {
    color: var(--jkr-color-gray-900);
    border-bottom-color: var(--jkr-color-gray-300);
}

.jkr-tab-button.active {
    color: var(--jkr-color-primary);
    border-bottom-color: var(--jkr-color-primary);
}

.jkr-tab-panel {
    display: none;
    animation: jkr-fade-in var(--jkr-transition-base) ease;
}

.jkr-tab-panel.active {
    display: block;
}

@keyframes jkr-fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   MICRO-INTERACTIONS AND ANIMATIONS
   ========================================================================== */

/* Hover Lift Effect */
.jkr-hover-lift {
    transition: transform var(--jkr-transition-base) ease, box-shadow var(--jkr-transition-base) ease;
}

.jkr-hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--jkr-shadow-lg);
}

/* Pulse Animation */
.jkr-pulse {
    animation: jkr-pulse 2s infinite;
}

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

/* Bounce Animation */
.jkr-bounce {
    animation: jkr-bounce 1s infinite;
}

@keyframes jkr-bounce {
    0%, 20%, 53%, 80%, 100% {
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
        transform: translate3d(0, -8px, 0);
    }
    70% {
        animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
        transform: translate3d(0, -4px, 0);
    }
    90% {
        transform: translate3d(0, -2px, 0);
    }
}

/* Shake Animation */
.jkr-shake {
    animation: jkr-shake 0.5s ease-in-out;
}

@keyframes jkr-shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-4px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(4px);
    }
}

/* Fade In Up Animation */
.jkr-fade-in-up {
    animation: jkr-fade-in-up 0.6s ease-out;
}

@keyframes jkr-fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scale In Animation */
.jkr-scale-in {
    animation: jkr-scale-in 0.3s ease-out;
}

@keyframes jkr-scale-in {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Slide In Right Animation */
.jkr-slide-in-right {
    animation: jkr-slide-in-right 0.4s ease-out;
}

@keyframes jkr-slide-in-right {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN UTILITIES
   ========================================================================== */

/* Mobile First Responsive Classes */
@media (max-width: 639px) {
    .jkr-sm-hidden {
        display: none !important;
    }
    
    .jkr-sm-full-width {
        width: 100% !important;
    }
    
    .jkr-sm-stack {
        flex-direction: column !important;
        gap: var(--jkr-space-2) !important;
    }
    
    .jkr-modal-content {
        margin: var(--jkr-space-2);
        max-width: calc(100% - var(--jkr-space-4));
    }
    
    .jkr-toast-container {
        left: var(--jkr-space-4);
        right: var(--jkr-space-4);
        top: var(--jkr-space-4);
        max-width: none;
    }
}

@media (min-width: 640px) and (max-width: 767px) {
    .jkr-md-hidden {
        display: none !important;
    }
}

@media (min-width: 768px) {
    .jkr-lg-show {
        display: block !important;
    }
    
    .jkr-lg-flex {
        display: flex !important;
    }
}

/* ==========================================================================
   ACCESSIBILITY ENHANCEMENTS
   ========================================================================== */

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

/* Screen Reader Only */
.jkr-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .jkr-btn {
        border-width: 2px;
    }
    
    .jkr-card {
        border-width: 2px;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   ADVANCED UI COMPONENTS
   ========================================================================== */

/* Toggle Switch */
.jkr-toggle {
    position: relative;
    display: inline-block;
    width: 3rem;
    height: 1.5rem;
}

.jkr-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.jkr-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--jkr-color-gray-300);
    transition: var(--jkr-transition-base);
    border-radius: var(--jkr-radius-full);
}

.jkr-toggle-slider:before {
    position: absolute;
    content: "";
    height: 1.25rem;
    width: 1.25rem;
    left: 0.125rem;
    bottom: 0.125rem;
    background-color: var(--jkr-color-white);
    transition: var(--jkr-transition-base);
    border-radius: var(--jkr-radius-full);
    box-shadow: var(--jkr-shadow-sm);
}

.jkr-toggle input:checked + .jkr-toggle-slider {
    background-color: var(--jkr-color-primary);
}

.jkr-toggle input:focus + .jkr-toggle-slider {
    box-shadow: 0 0 0 2px var(--jkr-color-primary-light);
}

.jkr-toggle input:checked + .jkr-toggle-slider:before {
    transform: translateX(1.5rem);
}

/* Stepper Component */
.jkr-stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: var(--jkr-space-6) 0;
}

.jkr-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    flex: 1;
}

.jkr-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 1rem;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: var(--jkr-color-gray-200);
    z-index: -1;
}

.jkr-step.completed:not(:last-child)::after {
    background-color: var(--jkr-color-success);
}

.jkr-step-circle {
    width: 2rem;
    height: 2rem;
    border-radius: var(--jkr-radius-full);
    background-color: var(--jkr-color-gray-200);
    border: 2px solid var(--jkr-color-gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--jkr-space-2);
    transition: all var(--jkr-transition-base) ease;
}

.jkr-step.active .jkr-step-circle {
    background-color: var(--jkr-color-primary);
    border-color: var(--jkr-color-primary);
    color: var(--jkr-color-white);
    transform: scale(1.1);
}

.jkr-step.completed .jkr-step-circle {
    background-color: var(--jkr-color-success);
    border-color: var(--jkr-color-success);
    color: var(--jkr-color-white);
}

.jkr-step-label {
    font-size: var(--jkr-font-size-sm);
    color: var(--jkr-color-gray-600);
    text-align: center;
    font-weight: var(--jkr-font-weight-medium);
}

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

.jkr-step.completed .jkr-step-label {
    color: var(--jkr-color-success);
}

/* Accordion Component */
.jkr-accordion {
    border: 1px solid var(--jkr-color-gray-200);
    border-radius: var(--jkr-radius-lg);
    overflow: hidden;
}

.jkr-accordion-item {
    border-bottom: 1px solid var(--jkr-color-gray-200);
}

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

.jkr-accordion-header {
    background-color: var(--jkr-color-gray-50);
    padding: var(--jkr-space-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--jkr-transition-fast) ease;
    user-select: none;
}

.jkr-accordion-header:hover {
    background-color: var(--jkr-color-gray-100);
}

.jkr-accordion-header.active {
    background-color: var(--jkr-color-primary-light);
    color: var(--jkr-color-primary-dark);
}

.jkr-accordion-title {
    font-weight: var(--jkr-font-weight-semibold);
    font-size: var(--jkr-font-size-base);
    margin: 0;
}

.jkr-accordion-icon {
    transition: transform var(--jkr-transition-fast) ease;
}

.jkr-accordion-header.active .jkr-accordion-icon {
    transform: rotate(180deg);
}

.jkr-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--jkr-transition-base) ease;
}

.jkr-accordion-content.active {
    max-height: 500px; /* Adjust as needed */
}

.jkr-accordion-body {
    padding: var(--jkr-space-4);
    background-color: var(--jkr-color-white);
}

/* Avatar Component */
.jkr-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--jkr-radius-full);
    background-color: var(--jkr-color-gray-100);
    color: var(--jkr-color-gray-600);
    font-weight: var(--jkr-font-weight-semibold);
    overflow: hidden;
}

.jkr-avatar-xs {
    width: 1.5rem;
    height: 1.5rem;
    font-size: var(--jkr-font-size-xs);
}

.jkr-avatar-sm {
    width: 2rem;
    height: 2rem;
    font-size: var(--jkr-font-size-sm);
}

.jkr-avatar-base {
    width: 2.5rem;
    height: 2.5rem;
    font-size: var(--jkr-font-size-base);
}

.jkr-avatar-lg {
    width: 3rem;
    height: 3rem;
    font-size: var(--jkr-font-size-lg);
}

.jkr-avatar-xl {
    width: 4rem;
    height: 4rem;
    font-size: var(--jkr-font-size-xl);
}

.jkr-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.jkr-avatar-group {
    display: flex;
    align-items: center;
}

.jkr-avatar-group .jkr-avatar {
    margin-left: -0.5rem;
    border: 2px solid var(--jkr-color-white);
    position: relative;
    z-index: 1;
}

.jkr-avatar-group .jkr-avatar:first-child {
    margin-left: 0;
}

.jkr-avatar-group .jkr-avatar:hover {
    z-index: 2;
    transform: scale(1.1);
}

/* Status Indicator */
.jkr-status-indicator {
    position: relative;
    display: inline-block;
}

.jkr-status-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--jkr-radius-full);
    border: 2px solid var(--jkr-color-white);
    background-color: var(--jkr-color-gray-400);
}

.jkr-status-indicator.online::after {
    background-color: var(--jkr-color-success);
    animation: jkr-pulse-success 2s infinite;
}

.jkr-status-indicator.busy::after {
    background-color: var(--jkr-color-warning);
}

.jkr-status-indicator.offline::after {
    background-color: var(--jkr-color-gray-400);
}

@keyframes jkr-pulse-success {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 163, 42, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 163, 42, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 163, 42, 0);
    }
}

/* Breadcrumb Component */
.jkr-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--jkr-space-2);
    margin-bottom: var(--jkr-space-6);
    padding: var(--jkr-space-3) 0;
}

.jkr-breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--jkr-space-2);
    color: var(--jkr-color-gray-600);
    text-decoration: none;
    font-size: var(--jkr-font-size-sm);
    transition: color var(--jkr-transition-fast) ease;
}

.jkr-breadcrumb-item:hover {
    color: var(--jkr-color-primary);
}

.jkr-breadcrumb-item.active {
    color: var(--jkr-color-gray-900);
    font-weight: var(--jkr-font-weight-semibold);
}

.jkr-breadcrumb-separator {
    color: var(--jkr-color-gray-400);
    font-size: var(--jkr-font-size-sm);
}

/* Pagination Component */
.jkr-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--jkr-space-1);
    margin: var(--jkr-space-6) 0;
}

.jkr-pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--jkr-color-gray-300);
    background-color: var(--jkr-color-white);
    color: var(--jkr-color-gray-700);
    text-decoration: none;
    border-radius: var(--jkr-radius-base);
    font-size: var(--jkr-font-size-sm);
    font-weight: var(--jkr-font-weight-medium);
    transition: all var(--jkr-transition-fast) ease;
    cursor: pointer;
}

.jkr-pagination-item:hover {
    background-color: var(--jkr-color-gray-50);
    border-color: var(--jkr-color-primary);
    color: var(--jkr-color-primary);
}

.jkr-pagination-item.active {
    background-color: var(--jkr-color-primary);
    border-color: var(--jkr-color-primary);
    color: var(--jkr-color-white);
}

.jkr-pagination-item:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Data Visualization */
.jkr-stat-card-modern {
    background: linear-gradient(135deg, var(--jkr-color-white) 0%, var(--jkr-color-gray-50) 100%);
    border: 1px solid var(--jkr-color-gray-200);
    border-radius: var(--jkr-radius-xl);
    padding: var(--jkr-space-6);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all var(--jkr-transition-base) ease;
}

.jkr-stat-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--jkr-color-primary), var(--jkr-color-info));
}

.jkr-stat-card-modern:hover {
    transform: translateY(-4px);
    box-shadow: var(--jkr-shadow-lg);
}

.jkr-stat-value {
    font-size: var(--jkr-font-size-3xl);
    font-weight: var(--jkr-font-weight-bold);
    color: var(--jkr-color-gray-900);
    margin-bottom: var(--jkr-space-2);
    line-height: var(--jkr-line-height-tight);
}

.jkr-stat-label {
    font-size: var(--jkr-font-size-sm);
    color: var(--jkr-color-gray-600);
    font-weight: var(--jkr-font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.jkr-stat-trend {
    font-size: var(--jkr-font-size-xs);
    margin-top: var(--jkr-space-1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--jkr-space-1);
}

.jkr-stat-trend.up {
    color: var(--jkr-color-success);
}

.jkr-stat-trend.down {
    color: var(--jkr-color-danger);
}

.jkr-stat-trend.neutral {
    color: var(--jkr-color-gray-500);
}

/* Timeline Component */
.jkr-timeline {
    position: relative;
    padding-left: var(--jkr-space-8);
}

.jkr-timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--jkr-color-gray-200);
}

.jkr-timeline-item {
    position: relative;
    margin-bottom: var(--jkr-space-6);
}

.jkr-timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--jkr-radius-full);
    background-color: var(--jkr-color-primary);
    border: 2px solid var(--jkr-color-white);
    box-shadow: var(--jkr-shadow-sm);
}

.jkr-timeline-content {
    background-color: var(--jkr-color-white);
    border: 1px solid var(--jkr-color-gray-200);
    border-radius: var(--jkr-radius-lg);
    padding: var(--jkr-space-4);
    box-shadow: var(--jkr-shadow-sm);
    transition: all var(--jkr-transition-fast) ease;
}

.jkr-timeline-content:hover {
    box-shadow: var(--jkr-shadow-base);
    transform: translateX(4px);
}

.jkr-timeline-time {
    font-size: var(--jkr-font-size-xs);
    color: var(--jkr-color-gray-500);
    margin-bottom: var(--jkr-space-1);
}

.jkr-timeline-title {
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    margin-bottom: var(--jkr-space-2);
}

.jkr-timeline-description {
    color: var(--jkr-color-gray-600);
    font-size: var(--jkr-font-size-sm);
    line-height: var(--jkr-line-height-relaxed);
}

/* Search Component */
.jkr-search {
    position: relative;
    display: inline-block;
    width: 100%;
    max-width: 20rem;
}

.jkr-search-input {
    width: 100%;
    padding: var(--jkr-space-3) var(--jkr-space-4);
    padding-left: 2.5rem;
    border: 1px solid var(--jkr-color-gray-300);
    border-radius: var(--jkr-radius-lg);
    font-size: var(--jkr-font-size-sm);
    transition: all var(--jkr-transition-fast) ease;
}

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

.jkr-search-icon {
    position: absolute;
    left: var(--jkr-space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--jkr-color-gray-400);
    font-size: var(--jkr-font-size-base);
}

.jkr-search-clear {
    position: absolute;
    right: var(--jkr-space-3);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--jkr-color-gray-400);
    cursor: pointer;
    padding: var(--jkr-space-1);
    border-radius: var(--jkr-radius-base);
    transition: all var(--jkr-transition-fast) ease;
}

.jkr-search-clear:hover {
    color: var(--jkr-color-gray-600);
    background-color: var(--jkr-color-gray-100);
}

/* Filter Chips */
.jkr-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--jkr-space-2);
    margin-bottom: var(--jkr-space-4);
}

.jkr-filter-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--jkr-space-2);
    padding: var(--jkr-space-2) var(--jkr-space-3);
    background-color: var(--jkr-color-gray-100);
    color: var(--jkr-color-gray-700);
    border-radius: var(--jkr-radius-full);
    font-size: var(--jkr-font-size-sm);
    font-weight: var(--jkr-font-weight-medium);
    transition: all var(--jkr-transition-fast) ease;
    cursor: pointer;
    border: 1px solid transparent;
}

.jkr-filter-chip:hover {
    background-color: var(--jkr-color-gray-200);
    transform: translateY(-1px);
}

.jkr-filter-chip.active {
    background-color: var(--jkr-color-primary);
    color: var(--jkr-color-white);
    border-color: var(--jkr-color-primary-dark);
}

.jkr-filter-chip-remove {
    background: none;
    border: none;
    color: currentColor;
    cursor: pointer;
    padding: 0;
    margin-left: var(--jkr-space-1);
    opacity: 0.7;
    transition: opacity var(--jkr-transition-fast) ease;
}

.jkr-filter-chip-remove:hover {
    opacity: 1;
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

/* Animation Utilities */
.jkr-animate-none {
    animation: none !important;
}

.jkr-transition-none {
    transition: none !important;
}

.jkr-transition-all {
    transition: all var(--jkr-transition-base) ease;
}

.jkr-transition-fast {
    transition: all var(--jkr-transition-fast) ease;
}

.jkr-transition-slow {
    transition: all var(--jkr-transition-slow) ease;
}

/* Transform Utilities */
.jkr-transform-none {
    transform: none;
}

.jkr-scale-95 {
    transform: scale(0.95);
}

.jkr-scale-105 {
    transform: scale(1.05);
}

.jkr-rotate-45 {
    transform: rotate(45deg);
}

.jkr-rotate-90 {
    transform: rotate(90deg);
}

/* Interactive States */
.jkr-interactive {
    cursor: pointer;
    user-select: none;
}

.jkr-interactive:hover {
    opacity: 0.8;
}

.jkr-interactive:active {
    transform: scale(0.98);
}

/* Loading States */
.jkr-loading-overlay {
    position: relative;
    pointer-events: none;
}

.jkr-loading-overlay::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: inherit;
    z-index: 1;
}

/* ==========================================================================
   ENHANCED COMPONENT LIBRARY - NEW ADDITIONS
   ========================================================================== */

/* Advanced Data Visualization Components */
.jkr-data-card {
    background: var(--jkr-color-white);
    border-radius: var(--jkr-radius-lg);
    padding: var(--jkr-space-6);
    box-shadow: var(--jkr-shadow-sm);
    border: 1px solid var(--jkr-color-gray-200);
    transition: all var(--jkr-transition-base) var(--jkr-ease-out);
    position: relative;
    overflow: hidden;
}

.jkr-data-card:hover {
    box-shadow: var(--jkr-shadow-md);
    transform: translateY(-1px);
}

.jkr-data-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--jkr-color-primary), var(--jkr-color-info));
}

.jkr-data-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--jkr-space-4);
}

.jkr-data-card-title {
    font-size: var(--jkr-font-size-lg);
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    margin: 0;
}

.jkr-data-card-value {
    font-size: var(--jkr-font-size-3xl);
    font-weight: var(--jkr-font-weight-bold);
    color: var(--jkr-color-primary);
    margin: var(--jkr-space-2) 0;
    line-height: var(--jkr-line-height-tight);
}

.jkr-data-card-trend {
    display: inline-flex;
    align-items: center;
    gap: var(--jkr-space-1);
    font-size: var(--jkr-font-size-sm);
    font-weight: var(--jkr-font-weight-medium);
    padding: var(--jkr-space-1) var(--jkr-space-2);
    border-radius: var(--jkr-radius-full);
}

.jkr-data-card-trend.positive {
    background-color: var(--jkr-color-success-light);
    color: var(--jkr-color-success-dark);
}

.jkr-data-card-trend.negative {
    background-color: var(--jkr-color-danger-light);
    color: var(--jkr-color-danger-dark);
}

.jkr-data-card-trend.neutral {
    background-color: var(--jkr-color-gray-100);
    color: var(--jkr-color-gray-600);
}

/* Advanced Progress Components */
.jkr-progress-ring {
    position: relative;
    display: inline-block;
    width: 120px;
    height: 120px;
}

.jkr-progress-ring svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.jkr-progress-ring-bg {
    fill: none;
    stroke: var(--jkr-color-gray-200);
    stroke-width: 8;
}

.jkr-progress-ring-progress {
    fill: none;
    stroke: var(--jkr-color-primary);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--jkr-transition-slow) var(--jkr-ease-out);
}

.jkr-progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--jkr-font-size-xl);
    font-weight: var(--jkr-font-weight-bold);
    color: var(--jkr-color-gray-900);
}

/* Enhanced Status Indicators */
.jkr-status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: var(--jkr-radius-full);
    position: relative;
}

.jkr-status-dot.active {
    background-color: var(--jkr-color-success);
    animation: jkr-pulse 2s infinite;
}

.jkr-status-dot.inactive {
    background-color: var(--jkr-color-gray-400);
}

.jkr-status-dot.warning {
    background-color: var(--jkr-color-warning);
    animation: jkr-pulse 2s infinite;
}

.jkr-status-dot.error {
    background-color: var(--jkr-color-danger);
    animation: jkr-pulse 1s infinite;
}

@keyframes jkr-pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.2);
    }
}

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

.jkr-form-label {
    display: block;
    font-size: var(--jkr-font-size-sm);
    font-weight: var(--jkr-font-weight-medium);
    color: var(--jkr-color-gray-700);
    margin-bottom: var(--jkr-space-2);
}

.jkr-form-label.required::after {
    content: ' *';
    color: var(--jkr-color-danger);
}

.jkr-form-input {
    width: 100%;
    padding: var(--jkr-space-3) var(--jkr-space-4);
    border: 1px solid var(--jkr-color-gray-300);
    border-radius: var(--jkr-radius-md);
    font-size: var(--jkr-font-size-base);
    transition: all var(--jkr-transition-fast) var(--jkr-ease-out);
    background-color: var(--jkr-color-white);
}

.jkr-form-input:focus {
    outline: none;
    border-color: var(--jkr-color-primary);
    box-shadow: var(--jkr-focus-ring);
}

.jkr-form-input:invalid {
    border-color: var(--jkr-color-danger);
}

.jkr-form-input:invalid:focus {
    box-shadow: var(--jkr-focus-ring-danger);
}

.jkr-form-help {
    font-size: var(--jkr-font-size-sm);
    color: var(--jkr-color-gray-600);
    margin-top: var(--jkr-space-1);
}

.jkr-form-error {
    font-size: var(--jkr-font-size-sm);
    color: var(--jkr-color-danger);
    margin-top: var(--jkr-space-1);
    display: flex;
    align-items: center;
    gap: var(--jkr-space-1);
}

/* Advanced Toggle Switch */
.jkr-toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.jkr-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.jkr-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--jkr-color-gray-300);
    transition: var(--jkr-transition-base);
    border-radius: var(--jkr-radius-full);
}

.jkr-toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: var(--jkr-color-white);
    transition: var(--jkr-transition-base);
    border-radius: var(--jkr-radius-full);
    box-shadow: var(--jkr-shadow-sm);
}

.jkr-toggle input:checked + .jkr-toggle-slider {
    background-color: var(--jkr-color-primary);
}

.jkr-toggle input:focus + .jkr-toggle-slider {
    box-shadow: var(--jkr-focus-ring);
}

.jkr-toggle input:checked + .jkr-toggle-slider:before {
    transform: translateX(24px);
}

/* Advanced Breadcrumb */
.jkr-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--jkr-space-2);
    font-size: var(--jkr-font-size-sm);
    color: var(--jkr-color-gray-600);
    margin-bottom: var(--jkr-space-6);
}

.jkr-breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--jkr-space-2);
}

.jkr-breadcrumb-item:not(:last-child)::after {
    content: '/';
    color: var(--jkr-color-gray-400);
}

.jkr-breadcrumb-link {
    color: var(--jkr-color-primary);
    text-decoration: none;
    transition: color var(--jkr-transition-fast);
}

.jkr-breadcrumb-link:hover {
    color: var(--jkr-color-primary-hover);
    text-decoration: none;
}

.jkr-breadcrumb-current {
    color: var(--jkr-color-gray-900);
    font-weight: var(--jkr-font-weight-medium);
}

/* Advanced Notification System */
.jkr-notification-container {
    position: fixed;
    top: var(--jkr-space-4);
    right: var(--jkr-space-4);
    z-index: var(--jkr-z-toast);
    max-width: 400px;
    width: 100%;
}

.jkr-notification {
    background: var(--jkr-color-white);
    border-radius: var(--jkr-radius-lg);
    box-shadow: var(--jkr-shadow-lg);
    padding: var(--jkr-space-4);
    margin-bottom: var(--jkr-space-3);
    position: relative;
    animation: jkr-slide-in-right var(--jkr-transition-base) var(--jkr-ease-out);
}

.jkr-notification.success {
}

.jkr-notification.warning {
}

.jkr-notification.error {
}

.jkr-notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--jkr-space-2);
}

.jkr-notification-title {
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    margin: 0;
}

.jkr-notification-close {
    background: none;
    border: none;
    color: var(--jkr-color-gray-400);
    cursor: pointer;
    padding: var(--jkr-space-1);
    border-radius: var(--jkr-radius-sm);
    transition: color var(--jkr-transition-fast);
}

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

.jkr-notification-message {
    color: var(--jkr-color-gray-600);
    font-size: var(--jkr-font-size-sm);
    line-height: var(--jkr-line-height-relaxed);
}

@keyframes jkr-slide-in-right {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Advanced Modal System */
.jkr-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--jkr-z-modal-backdrop);
    animation: jkr-fade-in var(--jkr-transition-base) var(--jkr-ease-out);
    backdrop-filter: blur(2px);
}

.jkr-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--jkr-color-white);
    border-radius: var(--jkr-radius-xl);
    box-shadow: var(--jkr-shadow-2xl);
    z-index: var(--jkr-z-modal);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    animation: jkr-scale-in var(--jkr-transition-base) var(--jkr-ease-bounce);
}

.jkr-modal-header {
    padding: var(--jkr-space-6) var(--jkr-space-6) var(--jkr-space-4);
    border-bottom: 1px solid var(--jkr-color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.jkr-modal-title {
    font-size: var(--jkr-font-size-xl);
    font-weight: var(--jkr-font-weight-semibold);
    color: var(--jkr-color-gray-900);
    margin: 0;
}

.jkr-modal-body {
    padding: var(--jkr-space-6);
    overflow-y: auto;
    max-height: 60vh;
}

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

@keyframes jkr-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes jkr-scale-in {
    from {
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* ==========================================================================
   ACCESSIBILITY ENHANCEMENTS
   ========================================================================== */

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

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

/* High Contrast Support */
@media (prefers-contrast: high) {
    :root {
        --jkr-color-gray-300: #999999;
        --jkr-color-gray-400: #777777;
        --jkr-color-gray-500: #555555;
    }
}

/* Screen Reader Only Content */
.jkr-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip Links */
.jkr-skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--jkr-color-gray-900);
    color: var(--jkr-color-white);
    padding: var(--jkr-space-2) var(--jkr-space-4);
    border-radius: var(--jkr-radius-md);
    text-decoration: none;
    z-index: var(--jkr-z-modal);
    transition: top var(--jkr-transition-fast);
}

.jkr-skip-link:focus {
    top: 6px;
}

/* ==========================================================================
   UTILITY CLASSES - ENHANCED
   ========================================================================== */

/* Container Utilities */
.jkr-container {
    width: 100%;
    max-width: var(--jkr-container-7xl);
    margin: 0 auto;
    padding: 0 var(--jkr-space-4);
}

.jkr-container-sm { max-width: var(--jkr-container-sm); }
.jkr-container-md { max-width: var(--jkr-container-md); }
.jkr-container-lg { max-width: var(--jkr-container-lg); }
.jkr-container-xl { max-width: var(--jkr-container-xl); }
.jkr-container-2xl { max-width: var(--jkr-container-2xl); }

/* Aspect Ratio Utilities */
.jkr-aspect-square { aspect-ratio: 1 / 1; }
.jkr-aspect-video { aspect-ratio: 16 / 9; }
.jkr-aspect-photo { aspect-ratio: 4 / 3; }

/* Truncate Text */
.jkr-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.jkr-line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.jkr-line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}