/**
 * ========================================
 * Accessibility Enhancements Styles
 * ========================================
 * أنماط تحسينات إمكانية الوصول
 * 
 * @version 1.0.0
 * @since Phase 5.2.3 - Accessibility Critical Fixes
 */

/* ========================================
   CSS Variables for Accessibility
   ======================================== */
:root {
    /* Focus Indicator System */
    --focus-ring-width: 2px;
    --focus-ring-color: #3b82f6;
    --focus-ring-offset: 2px;
    --focus-ring-style: solid;
    --focus-ring-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    
    /* High Contrast Mode */
    --high-contrast-bg: #000000;
    --high-contrast-text: #ffffff;
    --high-contrast-border: #ffffff;
}

/* Dark mode adjustments */
body.dark-mode {
    --focus-ring-color: #60a5fa; /* Brighter blue for dark backgrounds */
    --focus-ring-shadow: 0 0 0 3px rgba(96, 165, 250, 0.3);
}

/* ========================================
   Visually Hidden (Screen Reader Only)
   ======================================== */

/**
 * إخفاء بصري مع الحفاظ على إمكانية الوصول
 * Visually hidden but accessible to screen readers
 */
.visually-hidden,
.sr-only,
.screen-reader-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Make visible when focused (for skip links) */
.visually-hidden:focus,
.sr-only:focus,
.screen-reader-only:focus {
    position: static !important;
    width: auto !important;
    height: auto !important;
    margin: 0 !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
}

/* ========================================
   Skip Links
   ======================================== */

.skip-links {
    position: relative;
    z-index: 10000;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 10px;
    z-index: 10001;
    padding: 12px 20px;
    background: #3b82f6;
    color: #ffffff !important;
    text-decoration: none;
    border-radius: 0 0 8px 8px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: top 0.3s ease;
    font-family: 'Cairo', 'Tajawal', sans-serif;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid #fbbf24;
    outline-offset: 2px;
}

.skip-link:hover {
    background: #2563eb;
    color: #ffffff !important;
}

/* RTL Support */
[dir="rtl"] .skip-link {
    left: auto;
    right: 10px;
}

/* ========================================
   Unified Focus Indicators
   ======================================== */

/**
 * Global focus style (fallback for all focusable elements)
 */
*:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

/* Remove default outline (we're using custom) */
*:focus {
    outline: none;
}

/* ========================================
   Buttons & Interactive Elements
   ======================================== */

button:focus-visible,
.btn:focus-visible,
.control-btn:focus-visible,
.pause-btn:focus-visible,
.resume-btn:focus-visible,
.stop-btn:focus-visible,
.theme-toggle-btn:focus-visible,
.settings-btn:focus-visible,
.notifications-btn:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    box-shadow: var(--focus-ring-shadow);
}

/* Classification cards (clickable) */
.classification-card:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    transform: translateY(-2px);
}

/* ========================================
   Form Elements
   ======================================== */

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    box-shadow: var(--focus-ring-shadow);
    border-color: var(--focus-ring-color);
}

/* Filter inputs */
.filter-group input:focus,
.filter-group select:focus,
.search-group input:focus,
.search-group select:focus,
.smart-search-input:focus,
.range-inputs input:focus {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color) !important;
    outline-offset: var(--focus-ring-offset) !important;
    box-shadow: var(--focus-ring-shadow) !important;
}

/* Settings modal inputs */
.setting-input:focus {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color) !important;
    outline-offset: var(--focus-ring-offset) !important;
    box-shadow: var(--focus-ring-shadow) !important;
    border-color: var(--focus-ring-color) !important;
}

/* ========================================
   Links
   ======================================== */

a:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

/* ========================================
   DataTables Elements
   ======================================== */

/* Table cells */
table.dataTable tbody td:focus,
table.dataTable tbody tr:focus {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: -2px;
}

/* DataTables buttons */
.dt-button:focus-visible,
.buttons-excel:focus-visible,
.buttons-pdf:focus-visible,
.buttons-print:focus-visible,
.buttons-copy:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    box-shadow: var(--focus-ring-shadow);
}

/* Pagination */
.dataTables_paginate .paginate_button:focus {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

/* ========================================
   Tabs Navigation
   ======================================== */

.modern-tabs .tab-btn:focus-visible,
.tab-button:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    box-shadow: var(--focus-ring-shadow);
}

/* Modal tabs */
.modal-tabs button:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

/* ========================================
   Modal Dialogs
   ======================================== */

/* Modal overlay for screen readers */
.modal[aria-hidden="false"] {
    display: flex !important;
}

.modal[aria-hidden="true"] {
    display: none !important;
}

/* Modal close buttons */
.modal .close-btn:focus-visible,
#closeModal:focus-visible,
#minimizeModal:focus-visible,
#maximizeModal:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
    box-shadow: var(--focus-ring-shadow);
}

/* ========================================
   ARIA Live Regions
   ======================================== */

/* Ensure live regions are always hidden visually */
[role="status"],
[role="alert"],
[aria-live] {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   High Contrast Mode Support
   ======================================== */

@media (prefers-contrast: high) {
    :root {
        --focus-ring-width: 3px;
        --focus-ring-color: #000000;
    }
    
    body.dark-mode {
        --focus-ring-color: #ffffff;
    }
    
    /* Increase contrast for all interactive elements */
    button,
    a,
    input,
    select,
    textarea {
        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;
    }
    
    .skip-link {
        transition: none;
    }
}

/* ========================================
   Touch Target Sizes (Mobile Accessibility)
   ======================================== */

@media (max-width: 768px) {
    /* Ensure minimum 44x44px touch targets (WCAG 2.5.5) */
    button,
    .btn,
    a,
    .control-btn,
    .classification-card,
    .tab-btn,
    input[type="checkbox"],
    input[type="radio"] {
        min-width: 44px;
        min-height: 44px;
        padding: 12px;
    }
    
    /* Increase spacing between interactive elements */
    .filter-group,
    .search-group {
        margin-bottom: 16px;
    }
    
    button + button,
    .btn + .btn {
        margin-right: 12px;
    }
    
    [dir="rtl"] button + button,
    [dir="rtl"] .btn + .btn {
        margin-right: 0;
        margin-left: 12px;
    }
}

/* ========================================
   Dark Mode Specific Adjustments
   ======================================== */

body.dark-mode {
    /* Ensure sufficient contrast in dark mode */
    --focus-ring-color: #60a5fa;
}

body.dark-mode .skip-link {
    background: #60a5fa;
    color: #0b1220 !important;
}

body.dark-mode .skip-link:hover {
    background: #93c5fd;
}

body.dark-mode .skip-link:focus {
    outline-color: #fbbf24;
}

/* ========================================
   Keyboard Navigation Helpers
   ======================================== */

/* Visual indicator for keyboard users */
body.user-is-tabbing *:focus {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color) !important;
    outline-offset: var(--focus-ring-offset) !important;
}

/* Detect keyboard usage */
body:not(.user-is-tabbing) *:focus {
    outline: none;
}

/* ========================================
   Screen Reader Announcements
   ======================================== */

/* Loading states */
[aria-busy="true"]::after {
    content: " (جاري التحميل...)";
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Required fields */
[aria-required="true"]::before,
[required]::before {
    content: "*";
    color: #ef4444;
    margin-left: 4px;
    font-weight: bold;
}

[dir="rtl"] [aria-required="true"]::before,
[dir="rtl"] [required]::before {
    margin-left: 0;
    margin-right: 4px;
}

/* Invalid fields */
[aria-invalid="true"],
input:invalid,
select:invalid,
textarea:invalid {
    border-color: #ef4444 !important;
    border-width: 2px !important;
}

[aria-invalid="true"]:focus,
input:invalid:focus,
select:invalid:focus,
textarea:invalid:focus {
    outline-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

/* ========================================
   Print Styles (Accessibility)
   ======================================== */

@media print {
    .skip-links,
    [aria-hidden="true"],
    .visually-hidden {
        display: none !important;
    }
    
    /* Ensure links are visible */
    a[href]::after {
        content: " (" attr(href) ")";
    }
}

/* ========================================
   Custom Scrollbar (Accessibility)
   ======================================== */

/* Higher contrast scrollbars */
*::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

*::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

*::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.5);
    background-clip: padding-box;
}

body.dark-mode *::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

body.dark-mode *::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    background-clip: padding-box;
}

body.dark-mode *::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
    background-clip: padding-box;
}

/* ========================================
   Utility Classes
   ======================================== */

/* Force focus visible (for testing) */
.force-focus-visible:focus {
    outline: 3px solid #ff0000 !important;
    outline-offset: 2px !important;
}

/* Disable interactions (with proper ARIA) */
[aria-disabled="true"],
.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Loading state */
[aria-busy="true"] {
    opacity: 0.6;
    cursor: wait;
}

/* ========================================
   End of Accessibility Styles
   ======================================== */