/**
 * Accessibility Styles - WCAG 2.1 AA Compliance
 * High contrast mode, focus indicators, and accessibility-specific styles
 */

/* Skip Links */
.skip-links {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 9999;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    font-weight: 600;
    font-size: 14px;
    transition: top 0.2s ease-in-out;
    z-index: 10000;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid #ffd700;
    outline-offset: 2px;
}

/* Enhanced Focus Indicators */
.accessibility-focus-enhanced {
    outline: 3px solid #0066cc !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 5px rgba(0, 102, 204, 0.3) !important;
    position: relative;
    z-index: 1000;
}

/* High contrast focus for better visibility */
.high-contrast .accessibility-focus-enhanced {
    outline: 4px solid #ffff00 !important;
    outline-offset: 3px !important;
    box-shadow: 0 0 0 7px rgba(255, 255, 0, 0.5) !important;
}

/* Focus indicators for interactive elements */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus,
[role="button"]:focus,
[role="link"]:focus,
[role="tab"]:focus,
[role="menuitem"]:focus {
    outline: 2px solid #0066cc;
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.2);
}

/* Enhanced focus for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[role="button"]:focus-visible,
[role="link"]:focus-visible {
    outline: 3px solid #0066cc;
    outline-offset: 2px;
    box-shadow: 0 0 0 5px rgba(0, 102, 204, 0.3);
}

/* Remove focus outline for mouse users */
button:focus:not(:focus-visible),
a:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
    outline: none;
    box-shadow: none;
}

/* High Contrast Mode */
.high-contrast {
    filter: contrast(150%) brightness(110%);
}

.high-contrast * {
    background-color: #000000 !important;
    color: #ffffff !important;
    border-color: #ffffff !important;
}

.high-contrast a,
.high-contrast button,
.high-contrast [role="button"],
.high-contrast [role="link"] {
    background-color: #000080 !important;
    color: #ffff00 !important;
    border: 2px solid #ffffff !important;
}

.high-contrast a:hover,
.high-contrast button:hover,
.high-contrast [role="button"]:hover {
    background-color: #ffff00 !important;
    color: #000000 !important;
}

.high-contrast .bg-blue-600,
.high-contrast .bg-blue-500,
.high-contrast .bg-primary {
    background-color: #000080 !important;
}

.high-contrast .text-white {
    color: #ffffff !important;
}

.high-contrast .text-gray-600,
.high-contrast .text-gray-500,
.high-contrast .text-gray-400 {
    color: #cccccc !important;
}

/* Error States */
.accessibility-error {
    border: 2px solid #dc2626 !important;
    background-color: #fef2f2 !important;
    outline: none !important;
}

.accessibility-error:focus {
    outline: 3px solid #dc2626 !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 5px rgba(220, 38, 38, 0.3) !important;
}

.high-contrast .accessibility-error {
    border: 3px solid #ff0000 !important;
    background-color: #000000 !important;
    color: #ffffff !important;
}

/* Screen Reader Only Content */
.sr-only {
    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;
}

/* Keyboard Navigation Helpers */
.keyboard-navigation-active {
    /* Show focus indicators more prominently when keyboard navigation is detected */
}

.keyboard-navigation-active *:focus {
    outline: 3px solid #0066cc !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 5px rgba(0, 102, 204, 0.3) !important;
}

/* Touch Target Sizing (44px minimum) */
button,
a,
input[type="button"],
input[type="submit"],
input[type="reset"],
[role="button"],
[role="link"],
.clickable {
    min-height: 44px;
    min-width: 44px;
    padding: 8px 12px;
}

/* Ensure text inputs have adequate height */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="url"],
textarea,
select {
    min-height: 44px;
    padding: 8px 12px;
}

/* Navigation Controls Accessibility */
#navigation-controls button {
    position: relative;
}

#navigation-controls button:focus::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 2px solid #0066cc;
    border-radius: 6px;
    pointer-events: none;
}

/* POI Marker Accessibility */
.poi-marker {
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.poi-marker:focus {
    outline: 3px solid #0066cc;
    outline-offset: 2px;
    transform: scale(1.1);
    z-index: 1000;
}

.poi-marker:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Sidebar Accessibility */
#sidebar-info-panel {
    transition: transform 0.3s ease;
}

#sidebar-info-panel:focus-within {
    outline: 2px solid #0066cc;
    outline-offset: -2px;
}

/* Modal and Dialog Accessibility */
[role="dialog"] {
    outline: none;
}

[role="dialog"]:focus {
    outline: 2px solid #0066cc;
    outline-offset: -2px;
}

/* Language Switcher Accessibility */
#language-switcher button {
    position: relative;
}

#language-switcher button[aria-expanded="true"]::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid #0066cc;
    border-radius: 4px;
    pointer-events: none;
}

/* Media Viewer Accessibility */
#media-viewer {
    outline: none;
}

#media-viewer:focus-within {
    outline: 2px solid #0066cc;
    outline-offset: -2px;
}

/* Storytelling Overlay Accessibility */
#storytelling-overlay {
    outline: none;
}

#storytelling-overlay:focus-within {
    outline: 1px solid rgba(0, 102, 204, 0.5);
    outline-offset: -1px;
}

/* Progress Indicators */
.progress-indicator {
    position: relative;
}

.progress-indicator::after {
    content: attr(aria-valuenow) '% complete';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: #000;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.progress-indicator:focus::after,
.progress-indicator:hover::after {
    opacity: 1;
}

/* 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;
    }
    
    .poi-marker {
        transition: none !important;
    }
    
    .poi-marker:hover,
    .poi-marker:focus {
        transform: none !important;
    }
}

/* Color Contrast Improvements */
.text-gray-500 {
    color: #6b7280; /* Ensure 4.5:1 contrast ratio */
}

.text-gray-600 {
    color: #4b5563; /* Ensure 4.5:1 contrast ratio */
}

/* Link Styling for Better Accessibility */
a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:hover {
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

/* Button States */
button:disabled,
[role="button"][aria-disabled="true"] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

button:disabled:focus,
[role="button"][aria-disabled="true"]:focus {
    outline: 2px solid #9ca3af;
    outline-offset: 2px;
}

/* Form Validation */
input:invalid,
select:invalid,
textarea:invalid {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

input:valid,
select:valid,
textarea:valid {
    border-color: #10b981;
}

/* Loading States - Compatible with Fade System */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

/* Screen reader announcement for loading states */
.loading[aria-label]::after {
    content: attr(aria-label);
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Visual loading indicator for sighted users */
.loading.show-indicator::before {
    content: 'Loading...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    z-index: 1000;
}

/* Tooltip Accessibility */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after,
[data-tooltip]:focus::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #000;
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
    margin-bottom: 5px;
}

[data-tooltip]:hover::before,
[data-tooltip]:focus::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #000;
    z-index: 1000;
}

/* Print Styles for Accessibility */
@media print {
    .skip-links,
    #navigation-controls,
    .accessibility-focus-enhanced {
        display: none !important;
    }
    
    a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}

/* Large Text Support */
@media (min-resolution: 120dpi) {
    body {
        font-size: 18px;
        line-height: 1.6;
    }
    
    button,
    input,
    select,
    textarea {
        font-size: 16px;
        min-height: 48px;
    }
}

/* Dark Mode Accessibility */
@media (prefers-color-scheme: dark) {
    :root {
        --focus-color: #66b3ff;
        --error-color: #ff6b6b;
        --success-color: #51cf66;
    }
    
    .accessibility-focus-enhanced {
        outline-color: var(--focus-color) !important;
        box-shadow: 0 0 0 5px rgba(102, 179, 255, 0.3) !important;
    }
    
    .accessibility-error {
        border-color: var(--error-color) !important;
    }
}