/**
 * Free WCAG Accessibility Suite - Frontend Toolbar Styles
 * 
 * @package WP_Accessibility_Suite
 * @since 1.0.0
 */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
    /* Base theme */
    --wpa11y-bg-primary: #ffffff;
    --wpa11y-bg-secondary: #f5f5f5;
    --wpa11y-text-primary: #1a1a1a;
    --wpa11y-text-secondary: #4a4a4a;
    --wpa11y-link-color: #0066cc;
    --wpa11y-focus-ring: #0066cc;
    --wpa11y-border-color: #e0e0e0;
    
    /* Typography */
    --wpa11y-font-scale: 1;
    --wpa11y-letter-spacing: normal;
    --wpa11y-word-spacing: normal;
    --wpa11y-line-height: 1.5;
    --wpa11y-font-family: inherit;
    
    /* Toolbar */
    --wpa11y-toolbar-bg: #1a1a2e;
    --wpa11y-toolbar-text: #ffffff;
    --wpa11y-toolbar-accent: #4a90d9;
    --wpa11y-toolbar-radius: 12px;
    --wpa11y-toolbar-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   High Contrast Modes
   ========================================================================== */

/* High Contrast - Dark */
[data-a11y-contrast="high-dark"] {
    --wpa11y-bg-primary: #000000 !important;
    --wpa11y-bg-secondary: #1a1a1a !important;
    --wpa11y-text-primary: #ffffff !important;
    --wpa11y-text-secondary: #e0e0e0 !important;
    --wpa11y-link-color: #ffff00 !important;
    --wpa11y-focus-ring: #ffff00 !important;
    --wpa11y-border-color: #ffffff !important;
}

[data-a11y-contrast="high-dark"] body {
    background-color: #000000 !important;
    color: #ffffff !important;
}

[data-a11y-contrast="high-dark"] a {
    color: #ffff00 !important;
}

[data-a11y-contrast="high-dark"] img {
    filter: brightness(0.9) contrast(1.1);
}

/* High Contrast - Light */
[data-a11y-contrast="high-light"] {
    --wpa11y-bg-primary: #ffffff !important;
    --wpa11y-bg-secondary: #f0f0f0 !important;
    --wpa11y-text-primary: #000000 !important;
    --wpa11y-text-secondary: #1a1a1a !important;
    --wpa11y-link-color: #0000ee !important;
    --wpa11y-focus-ring: #000000 !important;
}

[data-a11y-contrast="high-light"] body {
    background-color: #ffffff !important;
    color: #000000 !important;
}

[data-a11y-contrast="high-light"] a {
    color: #0000ee !important;
    text-decoration: underline !important;
}

/* Yellow on Black */
[data-a11y-contrast="yellow-black"] {
    --wpa11y-bg-primary: #000000 !important;
    --wpa11y-text-primary: #ffff00 !important;
    --wpa11y-link-color: #00ffff !important;
    --wpa11y-focus-ring: #ffff00 !important;
}

[data-a11y-contrast="yellow-black"] body {
    background-color: #000000 !important;
    color: #ffff00 !important;
}

[data-a11y-contrast="yellow-black"] a {
    color: #00ffff !important;
}

/* ==========================================================================
   Font Size Scaling
   ========================================================================== */

html {
    font-size: calc(1rem * var(--wpa11y-font-scale, 1));
}

/* ==========================================================================
   Visual Filters
   ========================================================================== */

/* Grayscale */
[data-a11y-grayscale="true"] body > *:not(.wpa11y-toolbar):not(.wpa11y-reading-guide):not(.wpa11y-reading-mask) {
    filter: grayscale(1);
}

/* Invert Colors */
[data-a11y-invert-colors="true"] body > *:not(.wpa11y-toolbar):not(.wpa11y-reading-guide):not(.wpa11y-reading-mask) {
    filter: invert(1) hue-rotate(180deg);
}

[data-a11y-invert-colors="true"] img,
[data-a11y-invert-colors="true"] video {
    filter: invert(1) hue-rotate(180deg);
}

/* Low Saturation */
[data-a11y-low-saturation="true"] body > *:not(.wpa11y-toolbar):not(.wpa11y-reading-guide):not(.wpa11y-reading-mask) {
    filter: saturate(0.5);
}

/* ==========================================================================
   Typography
   ========================================================================== */

/* Readable Font (Atkinson Hyperlegible) */
[data-a11y-font="readable"] body {
    font-family: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, sans-serif !important;
}

/* Dyslexia Font (OpenDyslexic) */
[data-a11y-font="dyslexia"] body {
    font-family: 'OpenDyslexic', -apple-system, BlinkMacSystemFont, sans-serif !important;
    letter-spacing: 0.05em;
    word-spacing: 0.1em;
}

/* Text Spacing */
[data-a11y-text-spacing="true"] body {
    letter-spacing: 0.12em !important;
    word-spacing: 0.16em !important;
    line-height: 1.8 !important;
}

[data-a11y-text-spacing="true"] p {
    margin-bottom: 2em !important;
}

/* ==========================================================================
   Cursor
   ========================================================================== */

[data-a11y-cursor="large"] * {
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cpath fill='%23000' stroke='%23fff' stroke-width='2' d='M8 8L32 32L20 32L16 44L8 8Z'/%3E%3C/svg%3E") 8 8, auto !important;
}

[data-a11y-cursor="large"] a,
[data-a11y-cursor="large"] button,
[data-a11y-cursor="large"] [role="button"] {
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cpath fill='%23000' stroke='%23fff' stroke-width='2' d='M16 4L16 36L22 30L28 42L34 40L28 28L36 28L16 4Z'/%3E%3C/svg%3E") 16 4, pointer !important;
}

/* ==========================================================================
   Reading Aids
   ========================================================================== */

/* Highlight Links */
[data-a11y-highlight-links="true"] a {
    background: #ffff00 !important;
    color: #000000 !important;
    padding: 2px 4px !important;
    text-decoration: underline !important;
    box-decoration-break: clone;
}

/* Highlight Headings */
[data-a11y-highlight-headings="true"] h1,
[data-a11y-highlight-headings="true"] h2,
[data-a11y-highlight-headings="true"] h3,
[data-a11y-highlight-headings="true"] h4,
[data-a11y-highlight-headings="true"] h5,
[data-a11y-highlight-headings="true"] h6 {
    background: #e6f3ff !important;
    border-left: 4px solid #0066cc !important;
    padding: 8px 12px !important;
}

/* Hide Images */
[data-a11y-hide-images="true"] img,
[data-a11y-hide-images="true"] svg,
[data-a11y-hide-images="true"] video,
[data-a11y-hide-images="true"] [role="img"] {
    visibility: hidden !important;
}

/* ==========================================================================
   Animation Control
   ========================================================================== */

[data-a11y-motion="reduce"] *,
[data-a11y-motion="reduce"] *::before,
[data-a11y-motion="reduce"] *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
}

/* Respect OS preference */
@media (prefers-reduced-motion: reduce) {
    :root:not([data-a11y-motion="allow"]) * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   Toolbar Component
   ========================================================================== */

.wpa11y-toolbar {
    position: fixed;
    z-index: 999999;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    /* Ensure toolbar is unaffected by body filters */
    filter: none !important;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Position variants */
.wpa11y-toolbar[data-position="left"] {
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.wpa11y-toolbar[data-position="right"] {
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.wpa11y-toolbar[data-position="bottom"] {
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}

/* Trigger Button */
.wpa11y-trigger {
    width: 56px;
    height: 56px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--wpa11y-toolbar-bg);
    color: var(--wpa11y-toolbar-text);
    box-shadow: var(--wpa11y-toolbar-shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.wpa11y-trigger:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

.wpa11y-trigger:focus {
    outline: 3px solid var(--wpa11y-toolbar-accent);
    outline-offset: 3px;
}

.wpa11y-trigger svg {
    width: 28px;
    height: 28px;
}

.wpa11y-trigger[aria-expanded="true"] {
    background: var(--wpa11y-toolbar-accent);
}

/* Panel */
.wpa11y-panel {
    position: absolute;
    width: 340px;
    max-height: 80vh;
    background: var(--wpa11y-toolbar-bg);
    border-radius: var(--wpa11y-toolbar-radius);
    box-shadow: var(--wpa11y-toolbar-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.wpa11y-panel[hidden] {
    display: none;
}

/* Panel positioning based on trigger position */
.wpa11y-toolbar[data-position="left"] .wpa11y-panel {
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
}

.wpa11y-toolbar[data-position="right"] .wpa11y-panel {
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
}

.wpa11y-toolbar[data-position="bottom"] .wpa11y-panel {
    bottom: 70px;
    left: 50%;
    transform: translateX(-50%);
}

/* Header */
.wpa11y-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.wpa11y-header h2 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--wpa11y-toolbar-text);
}

.wpa11y-close {
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--wpa11y-toolbar-text);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.wpa11y-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.wpa11y-close:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
}

/* Content */
.wpa11y-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
}

/* Sections */
.wpa11y-section {
    margin-bottom: 24px;
}

.wpa11y-section:last-child {
    margin-bottom: 0;
}

.wpa11y-section h3 {
    margin: 0 0 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.6);
}

/* Option Groups */
.wpa11y-option-group {
    border: none;
    margin: 0 0 16px;
    padding: 0;
}

.wpa11y-option-group legend {
    font-size: 13px;
    font-weight: 500;
    color: var(--wpa11y-toolbar-text);
    margin-bottom: 8px;
}

/* Button Group (Radio-style) */
.wpa11y-button-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.wpa11y-option-btn {
    padding: 10px 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--wpa11y-toolbar-text);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.wpa11y-option-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

.wpa11y-option-btn:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
}

.wpa11y-option-btn.is-active,
.wpa11y-option-btn[aria-checked="true"] {
    background: var(--wpa11y-toolbar-accent);
    border-color: var(--wpa11y-toolbar-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(74, 144, 217, 0.4);
}

/* Contrast button specific colors */
.wpa11y-option-btn[data-value="high-dark"] {
    background: linear-gradient(135deg, #1a1a1a 50%, #333 50%);
}

.wpa11y-option-btn[data-value="high-light"] {
    background: linear-gradient(135deg, #fff 50%, #f0f0f0 50%);
    color: #000;
    border-color: rgba(0, 0, 0, 0.2);
}

.wpa11y-option-btn[data-value="yellow-black"] {
    background: linear-gradient(135deg, #bebebe 50%, #ffff00 50%);
    color: #000000;
}

.wpa11y-option-btn[data-value="high-dark"].is-active,
.wpa11y-option-btn[data-value="high-dark"][aria-checked="true"] {
    border-color: #fff;
    box-shadow: 0 0 0 2px #fff;
}

.wpa11y-option-btn[data-value="high-light"].is-active,
.wpa11y-option-btn[data-value="high-light"][aria-checked="true"] {
    border-color: #000;
    box-shadow: 0 0 0 2px #000;
}

.wpa11y-option-btn[data-value="yellow-black"].is-active,
.wpa11y-option-btn[data-value="yellow-black"][aria-checked="true"] {
    border-color: #ffff00;
    box-shadow: 0 0 0 2px #ffff00;
}

/* Slider Option */
.wpa11y-slider-option {
    margin-bottom: 16px;
}

.wpa11y-slider-option label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--wpa11y-toolbar-text);
    margin-bottom: 8px;
}

.wpa11y-slider-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.wpa11y-btn-decrease,
.wpa11y-btn-increase {
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    background: transparent;
    color: var(--wpa11y-toolbar-text);
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.wpa11y-btn-decrease:hover,
.wpa11y-btn-increase:hover {
    background: rgba(255, 255, 255, 0.1);
}

.wpa11y-btn-decrease:focus,
.wpa11y-btn-increase:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
}

.wpa11y-slider-wrapper input[type="range"] {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.2);
    appearance: none;
    cursor: pointer;
}

.wpa11y-slider-wrapper input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--wpa11y-toolbar-accent);
    cursor: pointer;
}

.wpa11y-slider-wrapper input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border: none;
    border-radius: 50%;
    background: var(--wpa11y-toolbar-accent);
    cursor: pointer;
}

.wpa11y-slider-wrapper input[type="range"]:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 4px;
}

.wpa11y-output {
    min-width: 48px;
    text-align: right;
    font-size: 13px;
    font-weight: 600;
    color: var(--wpa11y-toolbar-text);
}

/* Toggle Option */
.wpa11y-toggle-option {
    margin-bottom: 8px;
}

.wpa11y-switch-btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--wpa11y-toolbar-text);
    cursor: pointer;
    transition: background 0.2s ease;
}

.wpa11y-switch-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.wpa11y-switch-btn:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
}

.wpa11y-toggle-label {
    font-size: 14px;
    font-weight: 500;
}

.wpa11y-toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.wpa11y-toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s ease;
}

.wpa11y-switch-btn[aria-checked="true"] .wpa11y-toggle-switch {
    background: var(--wpa11y-toolbar-accent);
}

.wpa11y-switch-btn[aria-checked="true"] .wpa11y-toggle-switch::after {
    transform: translateX(20px);
}

/* Footer */
.wpa11y-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.wpa11y-reset {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: transparent;
    color: var(--wpa11y-toolbar-text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.wpa11y-reset:hover {
    background: rgba(255, 255, 255, 0.1);
}

.wpa11y-reset:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
}

.wpa11y-credit {
    display: block;
    margin-top: 12px;
    text-align: center;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.2s ease;
}

.wpa11y-credit:hover {
    color: var(--wpa11y-toolbar-accent);
}

.wpa11y-credit:focus {
    outline: 2px solid var(--wpa11y-toolbar-accent);
    outline-offset: 2px;
    color: var(--wpa11y-toolbar-text);
}

/* ==========================================================================
   Reading Guide Overlay
   ========================================================================== */

.wpa11y-reading-guide {
    position: fixed;
    left: 0;
    right: 0;
    height: 40px;
    background: rgba(255, 255, 0, 0.3);
    border-top: 2px solid #ffcc00;
    border-bottom: 2px solid #ffcc00;
    pointer-events: none;
    z-index: 999998;
    transition: top 0.05s linear;
}

/* ==========================================================================
   Reading Mask Overlay
   ========================================================================== */

.wpa11y-reading-mask {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999997;
}

.wpa11y-reading-mask::before,
.wpa11y-reading-mask::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
}

.wpa11y-reading-mask::before {
    top: 0;
    height: var(--mask-top, 0);
}

.wpa11y-reading-mask::after {
    bottom: 0;
    height: var(--mask-bottom, 0);
}

/* ==========================================================================
   Screen Reader Only
   ========================================================================== */

.wpa11y-screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Skip Links (Included for completeness)
   ========================================================================== */

.wpa11y-skip-links {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 100000;
}

.wpa11y-skip-link {
    position: absolute;
    top: -100px;
    left: 10px;
    padding: 12px 24px;
    background: #000;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: top 0.2s ease-in-out;
}

.wpa11y-skip-link:focus {
    top: 0;
    outline: 3px solid var(--wpa11y-focus-ring, #0066cc);
    outline-offset: 2px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 480px) {
    .wpa11y-toolbar[data-position="left"],
    .wpa11y-toolbar[data-position="right"] {
        left: auto;
        right: 16px;
        bottom: 16px;
        top: auto;
        transform: none;
    }
    
    .wpa11y-toolbar[data-position="left"] .wpa11y-panel,
    .wpa11y-toolbar[data-position="right"] .wpa11y-panel {
        position: fixed;
        left: 16px;
        right: 16px;
        bottom: 80px;
        top: auto;
        width: auto;
        max-height: 60vh;
        transform: none;
    }
    
    .wpa11y-panel {
        width: auto;
        max-height: 60vh;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .wpa11y-toolbar,
    .wpa11y-skip-links,
    .wpa11y-reading-guide,
    .wpa11y-reading-mask {
        display: none !important;
    }
}