/* ========================================
   ENTERPRISE ENHANCEMENTS - BEST-IN-CLASS UI/UX
   Premium polish matching Thomson Reuters, Clio, LexisNexis
   ======================================== */

/* ===== CSS Custom Properties - Extended Design Tokens ===== */
:root {
    /* Refined Color Palette - More sophisticated */
    --color-surface-elevated: #ffffff;
    --color-surface-sunken: #f8fafc;
    --color-surface-overlay: rgba(255, 255, 255, 0.95);
    
    /* Premium Gradients */
    --gradient-brand: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e40af 100%);
    --gradient-brand-subtle: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(30, 64, 175, 0.04) 100%);
    --gradient-ai: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 50%, #6d28d9 100%);
    --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --gradient-card-hover: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
    
    /* Enhanced Shadows - More depth and realism */
    --shadow-ambient: 0 1px 3px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 8px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-modal: 0 24px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-sticky: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-focus: 0 0 0 3px rgba(59, 130, 246, 0.25);
    --shadow-focus-danger: 0 0 0 3px rgba(239, 68, 68, 0.25);
    --shadow-focus-success: 0 0 0 3px rgba(16, 185, 129, 0.25);
    
    /* Refined Motion - More natural easing */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
    --duration-instant: 50ms;
    --duration-fast: 100ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;
    --duration-slower: 400ms;
    
    /* Typography - Enhanced Scale */
    --font-size-xxs: 0.625rem;   /* 10px */
    --font-size-xs: 0.6875rem;   /* 11px */
    --font-size-sm: 0.8125rem;   /* 13px */
    --font-size-base: 0.875rem;  /* 14px */
    --font-size-md: 0.9375rem;   /* 15px */
    --font-size-lg: 1rem;        /* 16px */
    --font-size-xl: 1.125rem;    /* 18px */
    --font-size-2xl: 1.375rem;   /* 22px */
    --font-size-3xl: 1.75rem;    /* 28px */
    
    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 900;
    --z-modal: 1000;
    --z-toast: 1100;
    --z-tooltip: 1200;
}

/* ===== Enhanced Body & Global Styles ===== */
body {
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Focus Management - Accessibility ===== */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

.focus-ring:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

/* ===== Skip Link for Accessibility ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: var(--color-primary-600);
    color: white;
    border-radius: var(--radius-lg);
    font-weight: 600;
    z-index: var(--z-toast);
    transition: top var(--duration-normal) var(--ease-out-quart);
}

.skip-link:focus {
    top: 16px;
}

/* ===== Enhanced Sidebar Navigation ===== */
.sidebar {
    background: var(--gradient-surface);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-ambient);
}

.sidebar-logo {
    position: relative;
    transition: transform var(--duration-normal) var(--ease-out-quart);
}

.sidebar-logo:hover {
    transform: scale(1.02);
}

.sidebar-logo::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* Enhanced Nav Items */
.nav-item {
    position: relative;
    border-radius: var(--radius-md);
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient-brand);
    border-radius: 0 2px 2px 0;
    transition: height var(--duration-normal) var(--ease-spring);
}

.nav-item:hover::before {
    height: 20px;
}

.nav-item.active::before {
    height: 28px;
}

.nav-item.active {
    background: var(--gradient-brand-subtle);
    font-weight: 600;
}

/* Nav Item Badge - Pulse Animation for Updates */
.nav-item-badge {
    animation: none;
}

.nav-item-badge.has-updates {
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ===== Premium Top Bar ===== */
.top-bar {
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    background: var(--color-surface-overlay) !important;
    box-shadow: var(--shadow-sticky);
}

/* Enhanced Search - Command Palette Style */
.top-bar input[type="text"] {
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.top-bar input[type="text"]:hover {
    border-color: var(--color-primary-300);
    box-shadow: var(--shadow-card);
}

/* Keyboard Shortcut Hint */
.keyboard-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--color-bg-hover);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: var(--font-size-xxs);
    font-weight: 600;
    color: var(--color-text-tertiary);
    box-shadow: 0 1px 0 var(--color-border);
}

/* ===== Premium Page Headers ===== */
.page-header {
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at 100% 0%, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.page-icon {
    position: relative;
    overflow: hidden;
}

.page-icon::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 40%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 60%
    );
    animation: iconShimmer 3s ease-in-out infinite;
}

@keyframes iconShimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* ===== Enhanced Buttons - Premium Feel ===== */
.btn {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.btn-primary {
    background: var(--gradient-brand);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    filter: brightness(1.05);
}

.btn-primary:active {
    filter: brightness(0.95);
}

/* Ripple Effect for Buttons */
.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: rippleEffect 0.6s ease-out;
    pointer-events: none;
}

@keyframes rippleEffect {
    to {
        transform: scale(2.5);
        opacity: 0;
    }
}

/* Loading State for Buttons */
.btn.loading {
    pointer-events: none;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btnSpinner 0.6s linear infinite;
}

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

/* ===== Premium Cards & Containers ===== */
.card {
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.card:hover {
    box-shadow: var(--shadow-card-hover);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary-200);
}

.card-interactive:active {
    transform: translateY(0);
}

/* ===== Premium Stat Cards ===== */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-slow) var(--ease-out-quart);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-value {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

/* Animated Counter */
.stat-value[data-animate="true"] {
    transition: all var(--duration-slow) var(--ease-out-quart);
}

/* Sparkline in Stat Cards */
.stat-sparkline {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 80px;
    height: 32px;
    opacity: 0.3;
}

/* ===== Enhanced Tables - Enterprise Grade ===== */
.table {
    font-variant-numeric: tabular-nums;
}

.table thead th {
    position: relative;
}

.table thead th::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 16px;
    background: var(--color-border);
}

.table thead th:last-child::after {
    display: none;
}

/* Sortable Headers */
.table th.sortable {
    cursor: pointer;
    user-select: none;
}

.table th.sortable:hover {
    background: var(--color-bg-hover);
}

.table th.sorted {
    background: var(--gradient-brand-subtle);
    color: var(--color-primary-700);
}

/* Row Selection Animation */
.table tbody tr {
    transition: all var(--duration-fast) var(--ease-out-quart);
}

.table tbody tr:active {
    background: var(--color-primary-50) !important;
}

/* Expandable Rows */
.table-row-expandable {
    cursor: pointer;
}

.table-row-expandable .expand-icon {
    transition: transform var(--duration-normal) var(--ease-out-quart);
}

.table-row-expandable.expanded .expand-icon {
    transform: rotate(90deg);
}

.table-row-details {
    background: var(--color-surface-sunken);
}

/* Inline Editing */
.table-cell-editable {
    position: relative;
    cursor: text;
}

.table-cell-editable:hover {
    background: var(--color-primary-50);
}

.table-cell-editable::after {
    content: '\f303'; /* FontAwesome edit icon */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    color: var(--color-text-tertiary);
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.table-cell-editable:hover::after {
    opacity: 1;
}

/* ===== Enhanced Status Badges ===== */
.status-badge {
    position: relative;
    overflow: hidden;
}

/* Status Dot Animation for Processing */
.status-badge.processing .status-dot {
    animation: statusPulse 1.5s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

/* ===== Premium Form Controls ===== */
.form-input,
.form-select,
.form-textarea {
    background: var(--gradient-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    font-size: var(--font-size-base);
    transition: all var(--duration-normal) var(--ease-out-quart);
}

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

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

/* Input with Icon */
.input-with-icon {
    position: relative;
}

.input-with-icon .input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
    transition: color var(--duration-fast);
}

.input-with-icon .form-input {
    padding-left: 40px;
}

.input-with-icon:focus-within .input-icon {
    color: var(--color-primary-500);
}

/* Floating Labels */
.form-group-floating {
    position: relative;
}

.form-group-floating .form-label {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
    pointer-events: none;
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.form-group-floating .form-input:focus ~ .form-label,
.form-group-floating .form-input:not(:placeholder-shown) ~ .form-label {
    top: 0;
    transform: translateY(-50%);
    font-size: var(--font-size-xs);
    background: white;
    padding: 0 4px;
    color: var(--color-primary-600);
}

/* ===== Enhanced Dropdowns ===== */
.dropdown-menu {
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
}

.dropdown-item {
    position: relative;
}

.dropdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-brand);
    transform: scaleY(0);
    transition: transform var(--duration-fast) var(--ease-out-quart);
}

.dropdown-item:hover::before {
    transform: scaleY(1);
}

/* Dropdown Item with Description */
.dropdown-item-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dropdown-item-title {
    font-weight: 600;
    color: var(--color-text-primary);
}

.dropdown-item-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* ===== Premium Modal/Dialog ===== */
.modal-backdrop {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal {
    background: var(--color-surface-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-modal);
    animation: modalEnter var(--duration-slow) var(--ease-out-quart);
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    background: var(--color-surface-sunken);
    border-top: 1px solid var(--color-border);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ===== Enhanced Toast Notifications ===== */
.toast {
    position: relative;
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    animation: toastEnter var(--duration-slow) var(--ease-spring);
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--color-primary-500);
    animation: toastProgress 5s linear forwards;
}

@keyframes toastProgress {
    from { width: 100%; }
    to { width: 0%; }
}

/* ===== Progress Indicators ===== */
.progress-bar {
    height: 6px;
    background: var(--color-bg-active);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-brand);
    border-radius: 3px;
    transition: width var(--duration-slow) var(--ease-out-quart);
}

.progress-bar-fill.animated {
    position: relative;
}

.progress-bar-fill.animated::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: progressShimmer 1.5s ease-in-out infinite;
}

@keyframes progressShimmer {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
}

/* ===== Skeleton Loading ===== */
.skeleton {
    position: relative;
    overflow: hidden;
    background: var(--color-bg-hover);
    border-radius: var(--radius-sm);
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.5),
        transparent
    );
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

@keyframes skeletonShimmer {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
}

.skeleton-text {
    height: 14px;
    margin-bottom: 8px;
}

.skeleton-text:last-child {
    width: 70%;
    margin-bottom: 0;
}

.skeleton-circle {
    border-radius: 50%;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
}

/* ===== Tooltips ===== */
.tooltip {
    position: absolute;
    padding: 8px 12px;
    background: var(--color-text-primary);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-modal);
    z-index: var(--z-tooltip);
    opacity: 0;
    transform: translateY(4px);
    pointer-events: none;
    transition: all var(--duration-fast) var(--ease-out-quart);
}

.tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: var(--color-text-primary);
}

/* ===== Command Palette ===== */
.command-palette-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.command-palette-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.command-palette {
    position: fixed;
    top: 15%;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    width: 100%;
    max-width: 600px;
    background: var(--color-surface-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-modal);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.command-palette.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.command-palette-input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.command-palette-input-wrapper i {
    color: var(--color-text-tertiary);
    font-size: 1rem;
}

.command-palette-input {
    flex: 1;
    border: none;
    background: none;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    outline: none;
}

.command-palette-input::placeholder {
    color: var(--color-text-tertiary);
}

.command-palette-results {
    max-height: 400px;
    overflow-y: auto;
    padding: 8px;
}

.command-palette-group {
    margin-bottom: 8px;
}

.command-palette-group-title {
    padding: 8px 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
}

.command-palette-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--duration-fast);
}

.command-palette-item:hover,
.command-palette-item.selected {
    background: var(--color-primary-50);
}

.command-palette-item-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-hover);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
}

.command-palette-item-content {
    flex: 1;
}

.command-palette-item-title {
    font-weight: 500;
    color: var(--color-text-primary);
}

.command-palette-item-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.command-palette-item-shortcut {
    display: flex;
    gap: 4px;
}

/* ===== Breadcrumbs Enhancement ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.breadcrumb-item:hover {
    color: var(--color-primary-600);
}

.breadcrumb-item.active {
    color: var(--color-text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--color-text-tertiary);
}

/* ===== Avatar & User Profile ===== */
.avatar {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 600;
    text-transform: uppercase;
    overflow: hidden;
}

.avatar-sm { width: 24px; height: 24px; font-size: 10px; }
.avatar-md { width: 32px; height: 32px; font-size: 12px; }
.avatar-lg { width: 40px; height: 40px; font-size: 14px; }
.avatar-xl { width: 56px; height: 56px; font-size: 18px; }

.avatar-status {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid white;
}

.avatar-status.online { background: var(--color-success-500); }
.avatar-status.away { background: var(--color-warning-500); }
.avatar-status.offline { background: var(--color-text-tertiary); }

/* ===== AI Assistant Styles ===== */
.ai-thinking {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.ai-thinking-dots {
    display: flex;
    gap: 4px;
}

.ai-thinking-dot {
    width: 6px;
    height: 6px;
    background: var(--color-ai);
    border-radius: 50%;
    animation: aiThinking 1.4s ease-in-out infinite;
}

.ai-thinking-dot:nth-child(2) { animation-delay: 0.2s; }
.ai-thinking-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes aiThinking {
    0%, 80%, 100% { transform: scale(0.7); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* AI Glow Effect */
.ai-glow {
    position: relative;
}

.ai-glow::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-ai);
    border-radius: inherit;
    filter: blur(8px);
    opacity: 0.4;
    z-index: -1;
}

/* ===== Data Visualization Enhancements ===== */
.chart-container {
    position: relative;
}

.chart-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-overlay);
    border-radius: inherit;
}

/* ===== Empty State Enhancement ===== */
.empty-state-illustration {
    width: 200px;
    height: 160px;
    margin-bottom: 24px;
}

.empty-state-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
}

.empty-state-secondary-action {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.empty-state-secondary-action a {
    color: var(--color-primary-600);
    text-decoration: none;
    font-weight: 500;
}

.empty-state-secondary-action a:hover {
    text-decoration: underline;
}

/* ===== Responsive Enhancements ===== */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        max-width: 280px;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: var(--z-modal);
        transform: translateX(-100%);
        transition: transform var(--duration-slow) var(--ease-out-quart);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.6);
        z-index: calc(var(--z-modal) - 1);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-normal);
    }
    
    .sidebar-backdrop.visible {
        opacity: 1;
        visibility: visible;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .top-bar .sidebar-toggle {
        display: flex !important;
    }
}

/* ===== Print Styles ===== */
@media print {
    .sidebar,
    .top-bar,
    .page-actions,
    .floating-ai-btn,
    .bulk-actions-bar,
    .pagination-wrapper,
    .action-btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .page {
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .table tbody tr {
        break-inside: avoid;
    }
}

/* ===== Dark Mode Refinements ===== */
[data-theme="dark"] {
    --color-surface-elevated: #1e293b;
    --color-surface-sunken: #0f172a;
    --color-surface-overlay: rgba(30, 41, 59, 0.95);
    
    --gradient-surface: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    --gradient-brand-subtle: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
}

[data-theme="dark"] .skeleton::after,
[data-theme="dark"] .progress-bar-fill.animated::after {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
}

[data-theme="dark"] .tooltip {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

[data-theme="dark"] .tooltip::after {
    border-bottom-color: var(--color-bg-hover);
}

/* ===== High Contrast Mode Support ===== */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-primary: #000000;
        --color-text-secondary: #333333;
    }
    
    .btn {
        border-width: 2px;
    }
    
    .status-badge,
    .filter-pill {
        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;
    }
}