/* ============================================================
   Accessibility & RTL Support - Enhanced
   ============================================================ */

/* ---------- Screen reader only ---------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* ---------- Focus visible for keyboard navigation ---------- */
:focus-visible {
    outline: 2px solid #4F46E5;
    outline-offset: 2px;
    border-radius: 2px;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid #4F46E5;
    outline-offset: 2px;
}

/* ---------- Skip link ---------- */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #4F46E5;
    color: white;
    padding: 8px 16px;
    z-index: 1000;
    transition: top 0.2s;
    text-decoration: none;
    font-weight: 600;
}
.skip-link:focus {
    top: 0;
}

/* ---------- ARIA live regions ---------- */
[aria-live="polite"] {
    min-height: 1.5em;
}
[aria-live="assertive"] {
    font-weight: 600;
}

/* ---------- Role: alert ---------- */
[role="alert"] {
    border-left: 4px solid #dc2626;
    padding: 12px 16px;
    background: #fef2f2;
    color: #991b1b;
    margin: 8px 0;
    border-radius: 0 4px 4px 0;
}
[role="status"] {
    border-left: 4px solid #2563eb;
    padding: 12px 16px;
    background: #eff6ff;
    color: #1e40af;
    margin: 8px 0;
    border-radius: 0 4px 4px 0;
}

/* ---------- Disabled state ---------- */
[aria-disabled="true"],
[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---------- Hidden but accessible ---------- */
[aria-hidden="true"] {
    /* Keep visual hidden but note: aria-hidden removes from AT */
}
.visually-hidden {
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

/* ============================================================
   RTL Support - Enhanced
   ============================================================ */

[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

/* Text alignment */
[dir="rtl"] .text-left { text-align: right; }
[dir="rtl"] .text-right { text-align: left; }
[dir="rtl"] .text-center { text-align: center; }

/* Float */
[dir="rtl"] .float-left { float: right; }
[dir="rtl"] .float-right { float: left; }

/* Margin auto */
[dir="rtl"] .ml-auto { margin-left: 0; margin-right: auto; }
[dir="rtl"] .mr-auto { margin-right: 0; margin-left: auto; }

/* Padding/margin mirroring for common components */
[dir="rtl"] .pl-1 { padding-left: 0; padding-right: 0.25rem; }
[dir="rtl"] .pr-1 { padding-right: 0; padding-left: 0.25rem; }
[dir="rtl"] .pl-2 { padding-left: 0; padding-right: 0.5rem; }
[dir="rtl"] .pr-2 { padding-right: 0; padding-left: 0.5rem; }
[dir="rtl"] .pl-3 { padding-left: 0; padding-right: 0.75rem; }
[dir="rtl"] .pr-3 { padding-right: 0; padding-left: 0.75rem; }
[dir="rtl"] .pl-4 { padding-left: 0; padding-right: 1rem; }
[dir="rtl"] .pr-4 { padding-right: 0; padding-left: 1rem; }

[dir="rtl"] .ml-1 { margin-left: 0; margin-right: 0.25rem; }
[dir="rtl"] .mr-1 { margin-right: 0; margin-left: 0.25rem; }
[dir="rtl"] .ml-2 { margin-left: 0; margin-right: 0.5rem; }
[dir="rtl"] .mr-2 { margin-right: 0; margin-left: 0.5rem; }
[dir="rtl"] .ml-3 { margin-left: 0; margin-right: 0.75rem; }
[dir="rtl"] .mr-3 { margin-right: 0; margin-left: 0.75rem; }
[dir="rtl"] .ml-4 { margin-left: 0; margin-right: 1rem; }
[dir="rtl"] .mr-4 { margin-right: 0; margin-left: 1rem; }

/* Navigation bar mirror */
[dir="rtl"] nav ul {
    padding-right: 0;
    padding-left: 0;
}
[dir="rtl"] nav li {
    float: right;
}
[dir="rtl"] .nav-left { float: right; }
[dir="rtl"] .nav-right { float: left; }

/* Forms */
[dir="rtl"] input[type="checkbox"],
[dir="rtl"] input[type="radio"] {
    margin-right: 0;
    margin-left: 8px;
}
[dir="rtl"] label {
    text-align: right;
}
[dir="rtl"] .form-group {
    text-align: right;
}

/* Cards and panels */
[dir="rtl"] .card {
    text-align: right;
}
[dir="rtl"] .card-header {
    text-align: right;
}

/* Tables */
[dir="rtl"] table {
    text-align: right;
}
[dir="rtl"] th,
[dir="rtl"] td {
    text-align: right;
}

/* Lists */
[dir="rtl"] ul,
[dir="rtl"] ol {
    padding-right: 1.5rem;
    padding-left: 0;
}

/* Icons and arrows flip */
[dir="rtl"] .arrow-left::before { content: "\\2192"; }
[dir="rtl"] .arrow-right::before { content: "\\2190"; }
[dir="rtl"] .chevron-left::before { content: "\\203A"; }
[dir="rtl"] .chevron-right::before { content: "\\2039"; }

/* Modal and dialog */
[dir="rtl"] .modal-header {
    text-align: right;
}
[dir="rtl"] .modal-close {
    left: 16px;
    right: auto;
}

/* Dropdown menus */
[dir="rtl"] .dropdown-menu {
    right: auto;
    left: 0;
    text-align: right;
}

/* Tooltips */
[dir="rtl"] .tooltip {
    text-align: right;
}

/* Progress bars */
[dir="rtl"] .progress-bar {
    direction: ltr;
}

/* Scrollbar for RTL */
[dir="rtl"]::-webkit-scrollbar {
    /* Keep default scrollbar */
}

/* ============================================================
   High contrast mode
   ============================================================ */
@media (prefers-contrast: high) {
    * {
        border-width: 2px !important;
        border-color: #000 !important;
    }
    a {
        text-decoration: underline !important;
    }
    button {
        border: 2px solid #000 !important;
    }
    :focus-visible {
        outline: 3px solid #000 !important;
        outline-offset: 3px !important;
    }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@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;
    }
}

/* ============================================================
   Color contrast helpers (WCAG 2.1 AA)
   ============================================================ */
.text-contrast-high {
    color: #111827;
}
.bg-contrast-high {
    background-color: #f9fafb;
}
.error-text {
    color: #991b1b;
    font-weight: 600;
}
.success-text {
    color: #166534;
    font-weight: 600;
}
.warning-text {
    color: #92400e;
    font-weight: 600;
}

/* ============================================================
   Keyboard navigation helpers
   ============================================================ */
.keyboard-nav *:focus {
    outline: 2px solid #4F46E5;
    outline-offset: 2px;
}
.trap-focus {
    /* Use with JS to trap focus in modals */
}

/* ============================================================
   Print styles (accessibility)
   ============================================================ */
@media print {
    .skip-link,
    nav,
    .no-print {
        display: none !important;
    }
    a[href]::after {
        content: " (" attr(href) ")";
    }
}