/**
 * Modern Core Styles
 * Production-ready CSS framework for Quantix
 * Uses CSS variables, Grid, Flexbox - no framework dependencies
 */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Primary (Blue) */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;

    /* Colors - Neutral */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Colors - Semantic */
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-danger: #ef4444;
    --color-danger-bg: #fee2e2;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;

    /* Spacing */
    --spacing-0: 0;
    --spacing-1: 0.25rem;    /* 4px */
    --spacing-2: 0.5rem;     /* 8px */
    --spacing-3: 0.75rem;    /* 12px */
    --spacing-4: 1rem;       /* 16px */
    --spacing-5: 1.25rem;    /* 20px */
    --spacing-6: 1.5rem;     /* 24px */
    --spacing-8: 2rem;       /* 32px */
    --spacing-10: 2.5rem;    /* 40px */
    --spacing-12: 3rem;      /* 48px */
    --spacing-16: 4rem;      /* 64px */

    /* Typography */
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */

    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.125rem;    /* 2px */
    --radius-md: 0.375rem;    /* 6px */
    --radius-lg: 0.5rem;      /* 8px */
    --radius-xl: 0.75rem;     /* 12px */
    --radius-2xl: 1rem;       /* 16px */
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.04);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 8px -2px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 12px 24px -4px rgb(0 0 0 / 0.08), 0 4px 8px -4px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 24px 48px -8px rgb(0 0 0 / 0.10), 0 8px 16px -6px rgb(0 0 0 / 0.06);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
--z-tooltip: 1070;

    /* Elevation */
    --elevation-1: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
    --elevation-2: 0 2px 6px rgba(0,0,0,0.05), 0 8px 20px rgba(0,0,0,0.05);
    --elevation-3: 0 4px 16px rgba(0,0,0,0.07), 0 12px 32px rgba(0,0,0,0.06);
    --elevation-4: 0 8px 28px rgba(0,0,0,0.10), 0 20px 48px rgba(0,0,0,0.08);

    /* Table Density */
    --table-row-height: 48px;
    --table-cell-padding-y: 12px;
    --table-cell-padding-x: 16px;
}

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

* {
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    min-height: 100vh;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    color: var(--color-gray-900);
}

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

p {
    margin-top: 0;
    margin-bottom: var(--spacing-4);
}

/* ===== Layout ===== */
.page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.page-header {
    background: linear-gradient(to bottom, #ffffff 0%, #fafbfd 100%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.07);
    padding: var(--spacing-5) var(--spacing-6);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.03);
}

.page-header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
}

.page-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-gray-900);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.page-main {
    flex: 1;
    padding: var(--spacing-5) var(--spacing-6);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ===== Card ===== */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-100);
    background: linear-gradient(to bottom, var(--color-gray-50) 0%, white 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
}

.card-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-gray-900);
    letter-spacing: -0.01em;
}

.card-body {
    flex: 1 1 auto;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-4);
    min-height: 0;
}

.table-container {
    flex: 1 1 auto;
    overflow: auto;
    min-height: 0;
}

.pagination {
    flex: 0 0 auto;
    padding: var(--spacing-3) 0 0;
    border-top: 1px solid var(--color-gray-200);
    margin-top: var(--spacing-3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.pagination-info {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

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

/* ===== Grid System ===== */
.grid {
    display: grid;
    gap: var(--spacing-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
    letter-spacing: -0.01em;
}

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

.btn-primary {
    background-color: var(--color-primary-600);
    color: white;
    border-color: var(--color-primary-600);
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.20), 0 2px 8px rgba(37, 99, 235, 0.14);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-700);
    border-color: var(--color-primary-700);
    box-shadow: 0 2px 4px rgba(29, 78, 216, 0.24), 0 4px 12px rgba(29, 78, 216, 0.18);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    color: var(--color-gray-700);
    border-color: var(--color-gray-200);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-300);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
    border-color: #dc2626;
}

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

.btn-success:hover:not(:disabled) {
    background-color: #059669;
    border-color: #059669;
}

.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-base);
}

/* ===== Icon Buttons ===== */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--color-gray-100);
    color: var(--color-gray-900);
}

.btn-icon.btn-sm {
    padding: var(--spacing-1);
}

.icon {
    width: 1.25rem;
    height: 1.25rem;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.icon-sm {
    width: 1rem;
    height: 1rem;
}

.icon-lg {
    width: 1.5rem;
    height: 1.5rem;
}

/* ===== Modern Table ===== */
.modern-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: var(--text-sm);
}

.modern-table thead th {
    background: var(--color-gray-50);
    font-weight: var(--font-semibold);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-gray-500);
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-200);
    white-space: nowrap;
    user-select: none;
    position: sticky;
    top: 0;
    z-index: 1;
}

.modern-table thead th:first-child { border-radius: 0; }

.modern-table tbody td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-700);
    vertical-align: middle;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modern-table tbody tr:last-child td {
    border-bottom: none;
}

.modern-table tbody tr:hover td {
    background-color: var(--color-primary-50);
    color: var(--color-gray-900);
}

/* ===== Forms ===== */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
}

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

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-gray-900);
    background-color: white;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow 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 rgba(59, 130, 246, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background-color: var(--color-gray-100);
    color: var(--color-gray-500);
    cursor: not-allowed;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

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

.form-input.is-invalid:focus,
.form-select.is-invalid:focus,
.form-textarea.is-invalid:focus {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* ===== Search ===== */
.search-box {
    position: relative;
}

.search-input {
    padding-left: var(--spacing-10);
}

.search-icon {
    position: absolute;
    left: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    pointer-events: none;
}

/* ===== Dialog/Modal ===== */
dialog {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 0;
    max-width: 90vw;
    max-height: 90vh;
}

dialog::backdrop {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.dialog-content {
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

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

.dialog-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-gray-900);
}

.dialog-body {
    padding: var(--spacing-6);
    overflow-y: auto;
    flex: 1;
}

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

/* ===== Responsive Utilities ===== */
@media (max-width: 640px) {
    .page-header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .card-header {
        flex-direction: column;
        align-items: stretch;
    }

    .dialog-footer {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ===== Loading Spinner ===== */
.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    min-width: 300px;
    max-width: 400px;
    padding: var(--spacing-4);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    animation: slideInRight 0.3s ease;
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

.toast-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2);
}

.toast-message {
    flex: 1;
    color: inherit;
    line-height: 1.5;
}

.toast-message strong {
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
}

.toast-close {
    background: none;
    border: none;
    font-size: var(--text-lg);
    color: var(--color-gray-400);
    cursor: pointer;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

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

/* ===== UX Enhancement Layer ===== */

/* Toast spring animation */
@keyframes toastSpringIn {
    0%   { opacity: 0; transform: translateX(60px) scale(0.9); }
    60%  { opacity: 1; transform: translateX(-6px) scale(1.02); }
    80%  { transform: translateX(4px) scale(0.99); }
    100% { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastSlideOut {
    to { opacity: 0; transform: translateX(60px); }
}
.toast.toast-spring {
    animation: toastSpringIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast-icon {
    font-size: 1rem;
    font-weight: 700;
    width: 1.5rem;
    flex-shrink: 0;
    text-align: center;
}

/* Fetch progress bar */
@keyframes qFetchSweep {
    0%   { left: -30%; width: 30%; }
    50%  { left: 40%;  width: 40%; }
    100% { left: 110%; width: 30%; }
}
.q-fetch-bar {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 0 0 2px 2px;
    overflow: hidden;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.15s;
}
.q-fetch-bar--active { opacity: 1; }
.q-fetch-bar--active::after {
    content: '';
    position: absolute;
    top: 0; height: 100%;
    background: var(--color-primary-500, #3b82f6);
    animation: qFetchSweep 1.1s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Search text highlight */
mark.q-highlight {
    background: rgba(255, 193, 40, 0.38);
    color: inherit;
    border-radius: 2px;
    font-weight: 600;
    padding: 0 1px;
}

/* Active search badge */
.q-search-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    background: var(--color-primary-100, #dbeafe);
    color: var(--color-primary-600, #2563eb);
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--color-primary-200, #bfdbfe);
    margin-right: 8px;
}

/* Recently viewed chips */
.q-recent-chips {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--color-gray-100, #f3f4f6);
}
.q-recent-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-gray-400, #9ca3af);
    letter-spacing: 0.05em;
    margin-right: 4px;
}
.q-recent-chip {
    padding: 3px 10px;
    border-radius: 20px;
    background: var(--color-gray-100, #f3f4f6);
    color: var(--color-gray-600, #4b5563);
    border: 1px solid var(--color-gray-200, #e5e7eb);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
}
.q-recent-chip:hover {
    background: var(--color-primary-100, #dbeafe);
    color: var(--color-primary-700, #1d4ed8);
    border-color: var(--color-primary-200, #bfdbfe);
}

/* Page entrance animation */
@keyframes qPageEntrance {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}
.page {
    animation: qPageEntrance 0.35s ease-out;
}

/* ===== Utilities ===== */
.text-sm { font-size: var(--text-sm); }
.text-lg { font-size: var(--text-lg); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }

.text-gray-500 { color: var(--color-gray-500); }
.text-gray-700 { color: var(--color-gray-700); }
.text-primary { color: var(--color-primary-500); }

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }

.hidden { display: none; }

/* ===== Keyboard Shortcuts ===== */
/* Selected Row (for keyboard navigation) */
.selected-row {
    background-color: var(--color-primary-50) !important;
    outline: 2px solid var(--color-primary-500);
    outline-offset: -2px;
}

/* Keyboard Shortcuts Help Dialog */
.shortcuts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-6);
}

.shortcut-category {
    margin-bottom: var(--spacing-6);
}

.shortcut-category h3 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    margin-bottom: var(--spacing-4);
    color: var(--color-gray-900);
}

.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.shortcut-keys {
    display: flex;
    gap: var(--spacing-1);
}

.shortcut-keys kbd {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-2);
    background-color: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    box-shadow: 0 1px 0 var(--color-gray-300);
}

.shortcut-description {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
}

/* Responsive */
@media (max-width: 640px) {
    .shortcuts-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Draft Auto-Save ===== */
.draft-toast {
    min-width: 400px;
    max-width: 500px;
    padding: var(--spacing-4);
}

.draft-toast .toast-content {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-3);
}

.draft-toast .font-semibold {
    font-size: var(--text-sm);
    color: var(--color-gray-900);
}

/* Draft Indicator in Form Header */
.draft-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-2);
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    margin-left: var(--spacing-2);
}

.draft-indicator::before {
    content: '●';
    animation: draftPulse 2s ease-in-out infinite;
}

@keyframes draftPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ===== Column Customization ===== */
.column-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    max-height: 400px;
    overflow-y: auto;
    padding: var(--spacing-2);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
}

.column-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2);
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    cursor: move;
    transition: all var(--transition-fast);
}

.column-item:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

.column-item[draggable="true"]:active {
    cursor: grabbing;
}

.column-drag-handle {
    color: var(--color-gray-400);
    cursor: grab;
    font-size: 16px;
    line-height: 1;
}

.column-item:hover .column-drag-handle {
    color: var(--color-gray-600);
}

.column-label {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.column-pin-btn {
    opacity: 0.3;
    transition: opacity var(--transition-fast);
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    padding: 0;
}

.column-pin-btn:hover {
    opacity: 0.6;
}

.column-pin-btn.pinned {
    opacity: 1;
}

/* Pinned columns in table */
.pinned {
    position: sticky;
    left: 0;
    background: white;
    z-index: 10;
    box-shadow: 2px 0 4px rgba(0, 0, 0, 0.1);
}

/* Responsive column customization */
@media (max-width: 640px) {
    .column-list {
        max-height: 300px;
    }

    .column-item {
        flex-wrap: wrap;
    }
}

/* ===== Export Dialog Styles ===== */
/* Spin animation for loading state */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.spin {
    animation: spin 1s linear infinite;
}

/* Export range radio buttons styling */
input[type="radio"][name="export-range"]:checked + div {
    color: var(--color-primary-700);
}

/* Column selection grid */
#export-columns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-2);
    max-height: 250px;
    overflow-y: auto;
    padding: var(--spacing-2);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background-color: var(--color-gray-50);
}

#export-columns-grid label:hover {
    background-color: var(--color-primary-50);
    border-radius: var(--radius-sm);
}

/* Export button icon animation */
#execute-export-btn:hover svg {
    transform: translateY(2px);
    transition: transform 0.2s ease;
}

/* Responsive export dialog */
@media (max-width: 640px) {
    #export-columns-grid {
        grid-template-columns: 1fr;
        max-height: 200px;
    }

    .export-range-options label {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ===== Optimistic UI Animations ===== */

/* Optimistic update state - pulse animation */
.optimistic-updating {
    animation: optimistic-pulse 1s ease-in-out;
}

@keyframes optimistic-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* New optimistic item - green highlight */
.optimistic-new {
    background-color: var(--color-success-bg) !important;
    animation: slideIn 0.3s ease;
}

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

/* Reverted item - shake animation + yellow highlight */
.reverted {
    animation: shake 0.5s ease;
    background-color: var(--color-warning-bg) !important;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* Toast slide animations */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* Undo toast button styling */
.toast .undo-btn {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast);
}

.toast .undo-btn:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}

/* Optimistic delete animation */
tr[data-id] {
    transition: all 0.2s ease;
}

/* ===== Virtual Scrolling Styles ===== */

/* Virtual scroll container */
.virtual-scroll-container {
    position: relative;
    overflow: auto;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
}

/* Virtual scroll wrapper */
.virtual-scroll-wrapper {
    position: relative;
}

/* Table in virtual scroll container */
.virtual-scroll-container table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

/* Table header stays sticky */
.virtual-scroll-container thead {
    position: sticky;
    top: 0;
    z-index: 10;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Virtual scrolling rows */
.virtual-scroll-container tbody tr {
    backface-visibility: hidden;
    will-change: transform;
}

/* Smooth scrolling for virtual container */
.virtual-scroll-container {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* Scrollbar styling for webkit browsers */
.virtual-scroll-container::-webkit-scrollbar {
    width: 12px;
}

.virtual-scroll-container::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: 6px;
}

.virtual-scroll-container::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: 6px;
    transition: background var(--transition-fast);
}

.virtual-scroll-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* Performance optimization: GPU acceleration */
.virtual-scroll-container tbody {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

/* Loading indicator for virtual scroll */
.virtual-scroll-loading {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-4);
    text-align: center;
    background: linear-gradient(to top, rgba(255,255,255,1), rgba(255,255,255,0));
    pointer-events: none;
}

/* Smooth row transitions */
.virtual-scroll-container tbody tr {
    transition: opacity 0.15s ease;
}

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

/* Ensure cells don't overflow */
.virtual-scroll-container td {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: var(--spacing-3);
}

/* Allow text wrapping in vendor name column */
.virtual-scroll-container td:first-child {
    white-space: normal;
}

/* Responsive design */
@media (max-width: 768px) {
    .virtual-scroll-container {
        font-size: 0.875rem;
    }

    .virtual-scroll-container td {
        padding: var(--spacing-2);
    }
}

/* Focus states for accessibility */
.virtual-scroll-container tbody tr:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: -2px;
    z-index: 5;
}

/* Print styles - disable virtual scrolling */
@media print {
    .virtual-scroll-container {
        height: auto !important;
        overflow: visible !important;
    }

    .virtual-scroll-container tbody {
        position: static !important;
        display: table-row-group !important;
    }

    .virtual-scroll-container tbody tr {
        position: static !important;
        height: auto !important;
    }
}

/* ===== Accessibility Styles (WCAG 2.1 AA) ===== */

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

/* Make sure screen reader content is not displayed */
.sr-only:focus {
    position: static !important;
    width: auto !important;
    height: auto !important;
    padding: inherit !important;
    margin: inherit !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
}

/* Focus visible indicator */
*:focus-visible {
    outline: 2px solid var(--color-primary-500) !important;
    outline-offset: 2px;
    outline-style: solid;
}

/* Hide outline for mouse users, show for keyboard users */
:focus:not(:focus-visible) {
    outline: none;
}

/* For browsers without :focus-visible support */
body:not(.user-is-tabbing) *:focus {
    outline: none;
}

body.user-is-tabbing *:focus,
body.user-is-tabbing .btn-icon:focus,
body.user-is-tabbing input:focus,
body.user-is-tabbing select:focus,
body.user-is-tabbing textarea:focus,
body.user-is-tabbing button:focus {
    outline: 2px solid var(--color-primary-500) !important;
    outline-offset: 2px;
}

/* Skip links for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-600);
    color: white;
    padding: var(--spacing-3) var(--spacing-4);
    text-decoration: none;
    z-index: 10000;
    transition: top 0.3s ease;
    font-weight: 500;
    border-radius: 0 0 var(--radius-md) 0;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    *:focus-visible {
        outline-width: 3px;
    }

    .btn-icon:focus {
        outline-width: 3px;
    }
}

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

    .skip-link {
        transition: none;
    }
}

/* Minimum touch target size (44x44px) */
@media (pointer: coarse) {
    .btn-icon,
    .modern-table tbody tr,
    button,
    input[type="checkbox"],
    input[type="radio"] {
        min-width: 44px;
        min-height: 44px;
    }

    .btn-icon {
        padding: var(--spacing-3);
    }
}

/* Ensure sufficient color contrast (already using good colors) */
/* Link focus indicator */
a:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Table row focus for keyboard navigation */
.modern-table tbody tr:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: -2px;
    background-color: var(--color-gray-50);
    position: relative;
    z-index: 1;
}

/* Dialog accessibility */
dialog[open] {
    z-index: 9999;
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
}

/* Ensure form labels are properly associated */
.form-group label {
    cursor: pointer;
    display: inline-block;
    margin-bottom: var(--spacing-1);
    font-weight: 500;
}

/* Error message accessibility */
.error-message,
.validation-error {
    color: var(--color-danger);
    display: block;
    margin-top: var(--spacing-1);
    font-size: 0.875rem;
}

[aria-invalid="true"] {
    border-color: var(--color-danger) !important;
}

[aria-invalid="true"]:focus-visible {
    outline-color: var(--color-danger) !important;
}

/* Live region announcements */
[aria-live="polite"],
[aria-live="assertive"] {
    /* Screen reader only - handled by .sr-only */
}

/* Loading indicators should announce to screen readers */
.loading-indicator[aria-busy="true"]::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-gray-300);
    border-top-color: var(--color-primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: var(--spacing-2);
}

/* Toggle buttons should have proper state */
[aria-pressed="true"] {
    background-color: var(--color-primary-100);
    border-color: var(--color-primary-500);
}

[aria-pressed="true"]::after {
    content: ' ✓';
    color: var(--color-primary-600);
}

/* Expanded/collapsed indicators */
[aria-expanded="true"] .icon-chevron,
[aria-expanded="false"] .icon-chevron {
    transition: transform var(--transition-fast);
}

[aria-expanded="true"] .icon-chevron {
    transform: rotate(180deg);
}

/* Disabled state should be visible */
button:disabled,
.btn:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button:disabled:focus,
.btn:disabled:focus {
    outline-style: dashed;
    outline-width: 2px;
}

/* Print accessibility */
@media print {
    .skip-link,
    [role="complementary"] {
        display: none;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }

    a[href^="#"]::after {
        content: "";
    }
}

/* Custom checkbox accessibility */
input[type="checkbox"]:focus-visible {
    outline-offset: 4px;
}

/* Radio button accessibility */
input[type="radio"]:focus-visible {
    outline-offset: 4px;
}

/* Multi-select checkbox groups */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
}

/* Autocomplete accessibility */
[role="combobox"] {
    position: relative;
}

[role="listbox"] {
    position: absolute;
    z-index: 100;
    background: white;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

[role="option"] {
    padding: var(--spacing-2) var(--spacing-3);
    cursor: pointer;
}

[role="option"][aria-selected="true"] {
    background-color: var(--color-primary-100);
}

[role="option"]:hover {
    background-color: var(--color-gray-100);
}

[role="option"]:focus {
    background-color: var(--color-primary-50);
    outline: 2px solid var(--color-primary-500);
    outline-offset: -2px;
}

/* Tabs accessibility */
[role="tablist"] {
    display: flex;
    gap: var(--spacing-2);
    border-bottom: 1px solid var(--color-gray-200);
}

[role="tab"] {
    padding: var(--spacing-3) var(--spacing-4);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

[role="tab"][aria-selected="true"] {
    border-bottom-color: var(--color-primary-500);
    color: var(--color-primary-600);
    font-weight: 500;
}

[role="tab"]:hover {
    background-color: var(--color-gray-50);
}

[role="tab"]:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Progress bar accessibility */
[role="progressbar"] {
    position: relative;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

[role="progressbar"]::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--color-primary-500);
    width: attr(value, '%');
    transition: width var(--transition-fast);
}

/* Modal accessibility */
.dialog[aria-modal="true"] {
    /* Already handled by native <dialog> element */
}

.dialog-content {
    /* Ensure modal content is accessible */
    position: relative;
}

/* Focus visible for icons in buttons */
.btn-icon:focus-visible svg {
    outline: none;
}

/* ===== Advanced Forms Styles ===== */

/* Field help tooltip icon */
.field-help-tooltip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--color-gray-200);
    color: var(--color-gray-600);
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition-fast);
    margin-left: var(--spacing-2);
}

.field-help-tooltip:hover {
    background-color: var(--color-primary-500);
    color: white;
    transform: scale(1.1);
}

.field-help-tooltip:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Tooltip popup */
.field-tooltip-popup {
    animation: tooltipFadeIn 0.2s ease;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Autocomplete dropdown */
.autocomplete-list {
    list-style: none;
    margin: 0;
    padding: 0;
    background: white;
}

.autocomplete-list li {
    padding: var(--spacing-2) var(--spacing-3);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.autocomplete-list li:hover,
.autocomplete-list li[aria-selected="true"] {
    background-color: var(--color-primary-50);
}

/* Field error messages */
.field-error-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    color: var(--color-danger);
    font-size: 0.875rem;
    margin-top: var(--spacing-1);
    animation: errorShake 0.3s ease;
}

.field-error-message::before {
    content: '⚠️';
    font-size: 1rem;
}

@keyframes errorShake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-4px);
    }
    75% {
        transform: translateX(4px);
    }
}

/* Invalid field styling */
[aria-invalid="true"] {
    border-color: var(--color-danger) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

[aria-invalid="true"]:focus {
    border-color: var(--color-danger) !important;
    outline-color: var(--color-danger) !important;
}

/* Required field indicator */
.form-group.required label::after {
    content: ' *';
    color: var(--color-danger);
}

/* Form group transitions */
.form-group {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.form-group[aria-hidden="true"] {
    display: none;
}

/* Enhanced input focus states */
input:focus,
select:focus,
textarea:focus {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transition: all var(--transition-fast);
}

/* Input validation states */
input:valid:not(:placeholder-shown),
select:valid,
textarea:valid:not(:placeholder-shown) {
    border-color: var(--color-gray-300);
}

input:not(:focus):user-invalid:not(:placeholder-shown),
select:user-invalid,
textarea:user-invalid {
    border-color: var(--color-danger);
}

/* Character counter for text inputs */
.character-counter {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    text-align: right;
    margin-top: var(--spacing-1);
}

.character-counter.warning {
    color: var(--color-warning);
}

.character-counter.error {
    color: var(--color-danger);
}

/* Form help text */
.form-help-text {
    display: block;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-top: var(--spacing-1);
    line-height: 1.4;
}

/* Inline validation feedback */
.input-with-validation {
    position: relative;
}

.input-with-validation .validation-icon {
    position: absolute;
    right: var(--spacing-3);
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.validation-icon.valid {
    color: var(--color-success);
}

.validation-icon.invalid {
    color: var(--color-danger);
}

/* Loading state for inputs */
input.loading,
select.loading {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24'%3E%3Cstyle%3E@keyframes spin { 100% { transform: rotate(360deg); } } .spinner { animation: spin 1s linear infinite; transform-origin: center; } %3C/style%3E%3Ccircle class='spinner' cx='12' cy='12' r='10' fill='none' stroke='%233b82f6' stroke-width='2' stroke-opacity='0.3' /%3E%3Cpath d='M12 2a10 10 0 0 1 10 10' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' /%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-2) center;
    background-size: 16px 16px;
}

/* Enhanced checkbox styling */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-gray-400);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

input[type="checkbox"]:checked {
    background-color: var(--color-primary-500);
    border-color: var(--color-primary-500);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    color: white;
    font-size: 14px;
    font-weight: bold;
}

input[type="checkbox"]:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

input[type="checkbox"]:hover {
    border-color: var(--color-primary-500);
}

/* Enhanced radio button styling */
input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-gray-400);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

input[type="radio"]:checked {
    border-color: var(--color-primary-500);
    box-shadow: inset 0 0 0 4px var(--color-primary-500);
}

input[type="radio"]:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

input[type="radio"]:hover {
    border-color: var(--color-primary-500);
}

/* Tag input styling */
.tag-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    padding: var(--spacing-2);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    min-height: 42px;
    align-items: center;
}

.tag-input-container:focus-within {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-2);
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.tag-remove {
    cursor: pointer;
    font-weight: bold;
    transition: color var(--transition-fast);
}

.tag-remove:hover {
    color: var(--color-danger);
}

.tag-input {
    border: none;
    outline: none;
    flex: 1;
    min-width: 100px;
    padding: var(--spacing-1);
}

/* File input styling */
.file-input-wrapper {
    position: relative;
    display: inline-block;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.file-name {
    margin-left: var(--spacing-2);
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* Form progress indicator */
.form-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

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

.form-progress-step.completed .step-number {
    background-color: var(--color-success);
    color: white;
}

.form-progress-step.active .step-number {
    background-color: var(--color-primary-500);
    color: white;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-gray-200);
    color: var(--color-gray-600);
    font-weight: 600;
    font-size: 0.875rem;
}

.step-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

.form-progress-step.active .step-label {
    color: var(--color-primary-600);
    font-weight: 500;
}

/* Responsive form adjustments */
@media (max-width: 640px) {
    .field-help-tooltip {
        width: 20px;
        height: 20px;
    }

    .tag-input-container {
        min-height: 48px; /* Larger touch target */
    }

    input[type="checkbox"],
    input[type="radio"] {
        width: 20px;
        height: 20px;
    }
}

/* Print styles */
@media print {
    .field-help-tooltip,
    .character-counter,
    .form-progress {
        display: none;
    }
}

/* ===== Action Log & Audit Trail Styles ===== */

/* Audit timeline container */
.audit-timeline {
    position: relative;
    max-height: 500px;
    overflow-y: auto;
    padding: var(--spacing-4) 0;
}

/* Individual audit event */
.audit-event {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-4) 0;
    position: relative;
}

.audit-event:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 48px;
    bottom: -8px;
    width: 2px;
    background: var(--color-gray-200);
}

/* Audit icon */
.audit-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-gray-100);
    font-size: 1rem;
    flex-shrink: 0;
    z-index: 1;
}

.audit-event:first-child .audit-icon {
    background-color: var(--color-primary-100);
}

/* Audit content */
.audit-content {
    flex: 1;
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    transition: background-color var(--transition-fast);
}

.audit-content:hover {
    background-color: var(--color-gray-100);
}

/* Audit header */
.audit-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2);
    gap: var(--spacing-3);
}

.audit-title {
    font-weight: 600;
    color: var(--color-gray-900);
}

.audit-time {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

/* Audit user info */
.audit-user {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2);
}

/* Audit diff viewer */
.audit-diff {
    margin-top: var(--spacing-3);
    padding-top: var(--spacing-3);
    border-top: 1px solid var(--color-gray-200);
}

.diff-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.diff-item {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    padding: var(--spacing-1) 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.diff-key {
    font-weight: 500;
    color: var(--color-gray-700);
}

.diff-removed {
    color: var(--color-danger);
    text-decoration: line-through;
    opacity: 0.8;
}

.diff-added {
    color: var(--color-success);
    font-weight: 600;
}

/* Audit trail button */
.audit-trail-btn {
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.audit-trail-btn:hover {
    color: var(--color-primary-600);
}

/* Audit empty state */
.audit-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-8);
    text-align: center;
    color: var(--color-gray-500);
}

/* History icon styling */
#icon-history {
    display: none;
}

/* Responsive design */
@media (max-width: 640px) {
    .audit-event {
        gap: var(--spacing-2);
    }

    .audit-icon {
        width: 28px;
        height: 28px;
        font-size: 0.875rem;
    }

    .audit-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    .audit-diff {
        flex-direction: column;
        gap: var(--spacing-1);
    }

    .diff-item {
        flex-direction: column;
        gap: 0;
    }
}

/* Print styles */
@media print {
    .audit-timeline {
        max-height: none;
        overflow: visible;
    }

    .audit-event {
        break-inside: avoid;
    }

    .audit-icon {
        background-color: white !important;
        border: 1px solid var(--color-gray-300);
    }
}

/* Animation for new audit events */
@keyframes auditSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.audit-event {
    animation: auditSlideIn 0.3s ease;
}

/* Icon color coding by action type */
.audit-event:first-child .audit-icon {
    background-color: var(--color-primary-100);
}

/* Action type-specific icons could be added here */
.audit-event[data-action="create"] .audit-icon {
    background-color: var(--color-success-bg);
}

.audit-event[data-action="update"] .audit-icon {
    background-color: var(--color-info-bg);
}

.audit-event[data-action="delete"] .audit-icon {
    background-color: var(--color-danger-bg);
}

/* Diff viewer enhancements */
.diff-item {
    page-break-inside: avoid;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .diff-removed {
        text-decoration: none;
        border-bottom: 2px solid var(--color-danger);
    }

    .diff-added {
        border-bottom: 2px solid var(--color-success);
    }
}

/* ===== Mobile Gestures Styles ===== */
/* Swipe Actions */

.swipe-action-overlay {
    position: absolute;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1.5rem;
    font-weight: 600;
    color: white;
    font-size: var(--text-sm);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
    z-index: 1;
}

.swipe-action-overlay svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.swipe-action-overlay.swipe-delete {
    background: linear-gradient(90deg, #ef4444 0%, #dc2626 100%);
    right: 0;
    left: auto;
    transform: translateX(100%);
}

.swipe-action-overlay.swipe-delete.visible {
    opacity: 1;
    transform: translateX(0);
}

.swipe-action-overlay.swipe-edit {
    background: linear-gradient(90deg, #3b82f6 0%, #2563eb 100%);
    left: 0;
    right: auto;
    transform: translateX(-100%);
}

.swipe-action-overlay.swipe-edit.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Pull-to-Refresh Indicator */

.pull-refresh-indicator {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 0 0 2rem 2rem;
    font-weight: 600;
    font-size: var(--text-sm);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    z-index: 1000;
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.pull-refresh-indicator .refresh-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.pull-refresh-indicator.loading .refresh-icon {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Touch Target Sizing */

@media (hover: none) and (pointer: coarse) {
    /* Touch device - enhance touch targets */
    
    .btn,
    .modern-table button,
    .pagination button,
    .filter-group button {
        min-height: 44px;
        min-width: 44px;
        padding: 0.75rem 1.25rem;
        font-size: var(--text-base);
    }

    .btn-icon {
        width: 44px;
        height: 44px;
        padding: 0;
    }

    /* Increase spacing between clickable elements */
    .actions-cell {
        gap: 0.5rem;
    }

    .actions-cell .btn-icon {
        margin: 0;
    }

    /* Better tap feedback */
    .btn:active,
    button:active {
        transform: scale(0.97);
        transition: transform 0.1s ease;
    }

    /* Remove tap highlight color */
    * {
        -webkit-tap-highlight-color: transparent;
        tap-highlight-color: transparent;
    }

    /* Custom tap highlight for buttons */
    .btn,
    button,
    a {
        position: relative;
        overflow: hidden;
    }

    .btn::after,
    button::after,
    a::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(102, 126, 234, 0.2);
        opacity: 0;
        transition: opacity 0.15s ease;
        pointer-events: none;
    }

    .btn:active::after,
    button:active::after,
    a:active::after {
        opacity: 1;
    }

    /* Prevent zoom on double tap */
    button,
    a,
    input,
    select,
    textarea {
        touch-action: manipulation;
    }

    /* Better scrolling */
    .modern-table-wrapper {
        -webkit-overflow-scrolling: touch;
        scroll-behavior: smooth;
    }

    /* Increase checkbox and radio button sizes */
    input[type="checkbox"],
    input[type="radio"] {
        width: 24px;
        height: 24px;
        min-width: 24px;
    }

    /* Better form inputs on mobile */
    input[type="text"],
    input[type="email"],
    input[type="number"],
    input[type="tel"],
    select,
    textarea {
        font-size: 16px; /* Prevent iOS zoom */
        min-height: 44px;
        padding: 0.75rem 1rem;
    }

    /* Increase close button hit areas */
    .dialog .btn-icon[data-close="dialog"] {
        width: 44px;
        height: 44px;
    }

    /* Toast notifications full width on mobile */
    .toast-container {
        left: 1rem;
        right: 1rem;
        width: auto;
        max-width: none;
    }

    /* Filter panel adjustments */
    .filter-panel {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        max-width: none;
        border-radius: 0;
        z-index: var(--z-modal);
    }

    .filter-panel .panel-header {
        padding-top: env(safe-area-inset-top, 1rem);
    }

    .filter-panel .panel-footer {
        padding-bottom: env(safe-area-inset-bottom, 1rem);
    }

    /* Pagination - larger buttons */
    .pagination button {
        min-width: 44px;
        min-height: 44px;
    }

    /* Table row swipe hint */
    .modern-table tbody tr {
        position: relative;
        overflow: hidden;
        touch-action: pan-y pinch-zoom;
    }

    /* Show swipe hint on first load */
    .swipe-hint {
        position: fixed;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.8);
        color: white;
        padding: 0.75rem 1.5rem;
        border-radius: var(--radius-full);
        font-size: var(--text-sm);
        z-index: var(--z-tooltip);
        animation: swipeHintFade 4s ease forwards;
        pointer-events: none;
    }

    @keyframes swipeHintFade {
        0% { opacity: 0; transform: translateX(-50%) translateY(20px); }
        10% { opacity: 1; transform: translateX(-50%) translateY(0); }
        80% { opacity: 1; transform: translateX(-50%) translateY(0); }
        100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    }
}

/* Responsive adjustments for small screens */
@media (max-width: 640px) {
    /* Pull refresh indicator centered */
    .pull-refresh-indicator {
        left: 1rem;
        right: 1rem;
        transform: translateY(-100%);
        border-radius: 0 0 1rem 1rem;
    }

    /* Swipe actions full width on mobile */
    .swipe-action-overlay {
        padding: 0 1rem;
    }

    /* Adjust table for swipe */
    .modern-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Ensure swiping doesn't interfere with horizontal scroll */
    .modern-table tbody tr {
        touch-action: pan-x pan-y;
    }
}

/* Support for notches and safe areas */
@supports (padding: max(0px)) {
    .pull-refresh-indicator {
        padding-top: max(1rem, env(safe-area-inset-top));
    }

    .filter-panel {
        padding-left: max(0px, env(safe-area-inset-left));
        padding-right: max(0px, env(safe-area-inset-right));
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .pull-refresh-indicator,
    .swipe-action-overlay {
        transition: none;
    }

    .btn:active,
    button:active {
        transform: none;
    }

    @keyframes spin {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }
}

/* ===== Zen Mode Toggle ===== */

.zen-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 50;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--color-border, var(--color-gray-200));
    background: var(--color-bg-elevated, var(--color-white, #fff));
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.7;
}

.zen-toggle:hover {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.zen-toggle svg {
    width: 18px;
    height: 18px;
    stroke: var(--color-gray-500);
    fill: none;
    stroke-width: 2;
    transition: all 0.3s ease;
}

.zen-toggle.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.zen-toggle.active svg {
    stroke: white;
}

/* Zen mode tooltip */
.zen-toggle::before {
    content: 'Zen Mode';
    position: absolute;
    right: 44px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    padding: 6px 10px;
    background: var(--color-gray-800);
    color: white;
    font-size: 11px;
    font-weight: 500;
    border-radius: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.zen-toggle:hover::before {
    opacity: 1;
}

.zen-toggle.active::before {
    content: 'Exit Zen';
}

/* ===== Page Header (Zen Mode Support) ===== */

.page-header {
    flex: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.zen-mode .page-header {
    flex: none;
    height: 0;
    min-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
    opacity: 0;
    pointer-events: none;
}

.zen-mode .page-header.zen-search-open {
    height: auto;
    min-height: unset;
    padding-top: var(--spacing-3);
    padding-bottom: var(--spacing-3);
    opacity: 1;
    pointer-events: auto;
}

.zen-mode .page-header.zen-search-open .page-header-content {
    display: flex;
}

.zen-mode .page-header.zen-search-open .kpi-cards,
.zen-mode .page-header.zen-search-open .kpi-strip {
    display: none !important;
}

#zen-search-close {
    display: none;
    flex-shrink: 0;
}

.zen-mode .page-header.zen-search-open #zen-search-close {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Zen mode - table gets more space */
.zen-mode .page-main {
    padding-top: var(--spacing-2);
}

/* Keep search functional even in zen mode (move to toolbar) */
.zen-mode .page-header-content {
    display: none;
}