/**
 * Accessibility styles for CoralLedger Manager
 * Phase 23: Accessibility & i18n
 */

/* ============================================
   Skip Link
   ============================================ */
.skip-link {
    position: fixed;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    padding: 12px 24px;
    background: var(--mud-palette-primary, #00B4D8);
    color: white;
    text-decoration: none;
    border-radius: 0 0 8px 8px;
    font-weight: 500;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--mud-palette-primary-darken);
    outline-offset: 2px;
}

/* ============================================
   Screen Reader Only
   ============================================ */
.sr-only,
.visually-hidden {
    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;
}

/* Show when focused (for skip links) */
.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
}

/* ============================================
   Focus Styles
   ============================================ */
:focus-visible {
    outline: 3px solid var(--mud-palette-primary, #00B4D8) !important;
    outline-offset: 2px !important;
}

/* Prevent focus outline on mouse click */
:focus:not(:focus-visible) {
    outline: none !important;
}

/* High visibility focus for buttons and links */
button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--mud-palette-primary, #00B4D8) !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 6px rgba(0, 180, 216, 0.2);
}

/* Focus within for form groups */
.mud-input-control:focus-within {
    outline: 2px solid var(--mud-palette-primary, #00B4D8);
    outline-offset: 1px;
    border-radius: 4px;
}

/* ============================================
   Keyboard Navigation
   ============================================ */
.keyboard-navigable {
    cursor: pointer;
}

.keyboard-navigable:focus-visible {
    outline: 3px solid var(--mud-palette-primary, #00B4D8);
    outline-offset: 2px;
}

.keyboard-navigable.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* ============================================
   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;
    }

    .skip-link {
        transition: none;
    }
}

/* ============================================
   High Contrast Mode
   ============================================ */
@media (prefers-contrast: more) {
    :root {
        --mud-palette-primary: #0066CC;
        --mud-palette-secondary: #660066;
        --mud-palette-error: #CC0000;
        --mud-palette-warning: #CC6600;
        --mud-palette-success: #006600;
    }

    button,
    a,
    [role="button"] {
        border: 2px solid currentColor !important;
    }

    :focus-visible {
        outline: 4px solid currentColor !important;
        outline-offset: 3px !important;
    }
}

/* Windows High Contrast Mode */
@media (forced-colors: active) {
    :focus-visible {
        outline: 3px solid Highlight !important;
    }

    button,
    a,
    [role="button"] {
        border: 2px solid ButtonText !important;
    }

    .skip-link {
        background: Highlight;
        color: HighlightText;
    }
}

/* ============================================
   RTL Support
   ============================================ */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .mud-drawer {
    right: 0;
    left: auto;
}

[dir="rtl"] .mud-drawer-content {
    direction: rtl;
}

[dir="rtl"] .d-flex {
    flex-direction: row-reverse;
}

[dir="rtl"] .d-flex.flex-column {
    flex-direction: column;
}

[dir="rtl"] .ml-auto {
    margin-left: 0 !important;
    margin-right: auto !important;
}

[dir="rtl"] .mr-auto {
    margin-right: 0 !important;
    margin-left: auto !important;
}

[dir="rtl"] .ml-1, [dir="rtl"] .ml-2, [dir="rtl"] .ml-3, [dir="rtl"] .ml-4 {
    margin-left: 0 !important;
}

[dir="rtl"] .mr-1, [dir="rtl"] .mr-2, [dir="rtl"] .mr-3, [dir="rtl"] .mr-4 {
    margin-right: 0 !important;
}

[dir="rtl"] .pl-1, [dir="rtl"] .pl-2, [dir="rtl"] .pl-3, [dir="rtl"] .pl-4 {
    padding-left: 0 !important;
}

[dir="rtl"] .pr-1, [dir="rtl"] .pr-2, [dir="rtl"] .pr-3, [dir="rtl"] .pr-4 {
    padding-right: 0 !important;
}

/* RTL text alignment */
[dir="rtl"] .text-left {
    text-align: right !important;
}

[dir="rtl"] .text-right {
    text-align: left !important;
}

/* RTL icons */
[dir="rtl"] .mud-icon-root {
    transform: scaleX(-1);
}

/* Don't flip certain icons */
[dir="rtl"] .mud-icon-root.no-rtl-flip {
    transform: none;
}

/* RTL navigation */
[dir="rtl"] .nav-item .mud-icon-root {
    margin-left: 8px;
    margin-right: 0;
}

/* RTL breadcrumbs */
[dir="rtl"] .mud-breadcrumbs .mud-breadcrumb-separator {
    transform: scaleX(-1);
}

/* ============================================
   Accessible Form Styles
   ============================================ */
.accessible-form-field {
    margin-bottom: 16px;
}

.accessible-form-field label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 0.875rem;
}

.accessible-form-field .required-indicator {
    color: var(--mud-palette-error);
    margin-left: 2px;
}

[dir="rtl"] .accessible-form-field .required-indicator {
    margin-left: 0;
    margin-right: 2px;
}

.accessible-form-field .helper-text {
    font-size: 0.75rem;
    color: var(--mud-palette-text-secondary);
    margin-top: 4px;
}

.accessible-form-field .error-message {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--mud-palette-error);
    margin-top: 4px;
}

/* ============================================
   Accessible Dialog Styles
   ============================================ */
.accessible-dialog .mud-dialog-title {
    padding: 16px 24px;
    border-bottom: 1px solid var(--mud-palette-divider);
}

.accessible-dialog .mud-dialog-content {
    padding: 24px;
}

.accessible-dialog .mud-dialog-actions {
    padding: 16px 24px;
    border-top: 1px solid var(--mud-palette-divider);
}

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

.loading-announcement {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

/* ============================================
   Interactive Element Minimum Size
   WCAG 2.5.5 Target Size (Enhanced)
   ============================================ */
button,
a,
[role="button"],
[role="link"],
input[type="checkbox"],
input[type="radio"],
.clickable {
    min-width: 44px;
    min-height: 44px;
}

/* Exception for inline links */
p a,
span a,
li a {
    min-width: auto;
    min-height: auto;
}

/* ============================================
   Landmark Regions
   ============================================ */
main,
[role="main"] {
    outline: none;
}

main:focus {
    outline: none;
}

/* ============================================
   Table Accessibility
   ============================================ */
.accessible-table th {
    font-weight: 600;
    text-align: left;
}

[dir="rtl"] .accessible-table th {
    text-align: right;
}

.accessible-table th[scope="col"] {
    vertical-align: bottom;
}

.accessible-table th[scope="row"] {
    font-weight: 500;
}

/* Sortable column headers */
.accessible-table th[aria-sort] {
    cursor: pointer;
}

.accessible-table th[aria-sort]:hover {
    background-color: var(--mud-palette-background-grey);
}

.accessible-table th[aria-sort="ascending"]::after {
    content: " ▲";
    font-size: 0.75em;
}

.accessible-table th[aria-sort="descending"]::after {
    content: " ▼";
    font-size: 0.75em;
}