/**
 * Accessibility Styles - Stream 17: UI/UX Polish & Accessibility
 * Comprehensive accessibility and UI enhancement styles
 */

/* === THEME SYSTEM === */
:root {
    --color-focus: #4a90e2;
    --color-focus-ring: rgba(74, 144, 226, 0.3);
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;

[data-theme="light"] {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f5f5f5;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;

[data-theme="dark"] {
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #1a1a1a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #cccccc;
    --color-border: #333333;

/* === FONT SIZE SYSTEM === */
[data-font-size="small"] {
    font-size: 0.875rem;

[data-font-size="medium"] {
    font-size: 1rem;

[data-font-size="large"] {
    font-size: 1.125rem;

[data-font-size="xlarge"] {
    font-size: 1.25rem;

[data-font-size="small"] * {
    font-size: inherit;

[data-font-size="large"] * {
    font-size: inherit;

[data-font-size="xlarge"] * {
    font-size: inherit;

/* === LAYOUT SYSTEM === */
[data-layout="compact"] {
    --spacing-base: 0.5rem;
    --spacing-sm: 0.25rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;

[data-layout="spacious"] {
    --spacing-base: 1.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.25rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

/* === HIGH CONTRAST MODE === */
.high-contrast {
    --color-text-primary: #ffffff;
    --color-text-secondary: #ffffff;
    --color-bg-primary: #000000;
    --color-bg-secondary: #1a1a1a;
    --color-border: #ffffff;

.high-contrast * {
    border-color: var(--color-border) !important;

.high-contrast button,
.high-contrast .btn-terminal {
    border: 2px solid var(--color-border) !important;

/* === REDUCED MOTION === */
.reduced-motion *,
.reduced-motion *::before,
.reduced-motion *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;

/* === FOCUS INDICATORS === */
*:focus-visible {
    outline: 3px solid var(--color-focus) !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 5px var(--color-focus) !important;

button:focus-visible,
.btn-terminal:focus-visible {
    outline: 3px solid var(--color-focus) !important;
    outline-offset: 2px !important;

/* === 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;

/* === LOADING STATES === */
.accessibility-loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 99999;

.accessibility-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);

.accessibility-loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border, #333);
    border-top-color: var(--color-focus, #4a90e2);
    border-radius: 50%;
    animation: accessibility-spin 1s linear infinite;

.accessibility-loading-message {
    color: var(--color-text-primary, #fff);
    font-size: 1rem;
    text-align: center;

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

.reduced-motion .accessibility-loading-spinner {
    animation: none;
    border-top-color: var(--color-focus, #4a90e2);

/* === FORM VALIDATION === */
.field-error {
    color: #ff4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;

input.error,
textarea.error,
select.error {
    border-color: #ff4444 !important;
    box-shadow: 0 0 0 2px rgba(255, 68, 68, 0.2) !important;

input.error:focus,
textarea.error:focus,
select.error:focus {
    outline-color: #ff4444 !important;

/* === ACCESSIBILITY SETTINGS PANEL === */
.accessibility-settings-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    background: var(--color-bg-secondary, #1a1a1a);
    border: 2px solid var(--color-border, #333);
    border-radius: 8px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow), transform var(--transition-slow);

.accessibility-settings-panel.active {
    opacity: 1;
    pointer-events: all;

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border, #333);

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-text-primary, #fff);

.close-btn {
    background: none;
    border: none;
    color: var(--color-text-primary, #fff);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    border-radius: 4px;
    transition: background var(--transition-base);

.close-btn:hover {
    background: var(--color-bg-primary, #0a0a0a);

.close-btn:focus-visible {
    outline: 3px solid var(--color-focus) !important;
    outline-offset: 2px !important;

.modal-content {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;

.settings-section {
    margin-bottom: 2rem;

.settings-section h3 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
    color: var(--color-text-primary, #fff);

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;

.settings-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary, #ccc);
    cursor: pointer;

.settings-group input[type="radio"],
.settings-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;

.settings-hint {
    font-size: 0.875rem;
    color: var(--color-text-secondary, #999);
    margin-top: 0.5rem;
    font-style: italic;

.modal-footer {
    padding: 1rem;
    border-top: 1px solid var(--color-border, #333);
    display: flex;
    justify-content: flex-end;

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
    .accessibility-settings-panel {
        width: 95%;
        max-height: 95vh;

    .modal-content {
        padding: 1rem;

    .settings-section {
        margin-bottom: 1.5rem;

/* === KEYBOARD NAVIGATION ENHANCEMENTS === */
[role="tablist"] [role="tab"]:focus,
[role="group"] button:focus,
.button-group button:focus {
    outline: 3px solid var(--color-focus) !important;
    outline-offset: 2px !important;

/* === TOOLTIP ACCESSIBILITY === */
[data-tooltip][aria-describedby] {
    position: relative;

/* === ANIMATIONS === */
@keyframes fadeIn {
    from {
        opacity: 0;

    to {
        opacity: 1;

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

    to {
        transform: translateY(0);
        opacity: 1;

.fade-in {
    animation: fadeIn var(--transition-slow);

.slide-in {
    animation: slideIn var(--transition-slow);

.reduced-motion .fade-in,
.reduced-motion .slide-in {
    animation: none;

/* === SKIP LINKS === */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-bg-primary, #0a0a0a);
    color: var(--color-text-primary, #fff);
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 100000;
    border: 2px solid var(--color-focus, #4a90e2);

.skip-link:focus {
    top: 0;

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