/**
 * Essential Accessibility CSS
 * 
 * Minimal CSS for essential accessibility features only.
 * 
 * @author UC Website Team
 * @version 1.0.0
 */

/* Screen reader only elements - completely invisible */
.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;
}

/* Skip link - properly focusable and accessible */
.skip-link {
    position: absolute;
    top: -100px;
    left: 6px;
    background: var(--primary, #FDCF33);
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
    font-weight: bold;
    font-size: 14px;
    line-height: 1.4;
    border: 2px solid #000;
    opacity: 0;
    transition: all 0.2s ease;
    outline: none;
}

.skip-link:focus {
    top: 6px;
    opacity: 1;
    outline: none;
}

.skip-link:hover {
    background: var(--primary-hover, #FEBE10);
}

/* Ensure main content is focusable */
#main-content {
    outline: none;
}

#main-content:focus {
    outline: 2px solid var(--primary, #FDCF33);
    outline-offset: 2px;
}

/* Invisible contrast enhancement - only for accessibility tools */
@media (prefers-contrast: high) {
    body {
        filter: contrast(1.1) brightness(0.95);
    }
    
    .btn-toggle+label,
    .pills-kendaraan-tab .nav-link,
    .search-card .form-select,
    .fc .fc-button-primary,
    .nav-link,
    a.news-link {
        filter: contrast(1.2) brightness(0.9);
    }
}

/* Invisible contrast for reduced motion users */
@media (prefers-reduced-motion: reduce) {
    body {
        filter: contrast(1.05) brightness(0.98);
    }
    
    .btn-toggle+label,
    .pills-kendaraan-tab .nav-link,
    .search-card .form-select,
    .fc .fc-button-primary,
    .nav-link,
    a.news-link {
        filter: contrast(1.15) brightness(0.95);
    }
}

/* Minimal focus indicators - only visible in high contrast mode */
@media (prefers-contrast: high) {
    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 2px solid currentColor;
        outline-offset: 2px;
    }
}

/* Ensure proper cursor for interactive elements */
[role="button"] {
    cursor: pointer;
}

[role="tab"] {
    cursor: pointer;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}