/**
 * Accessibility Styles
 * Enhanced focus states, skip links, and ARIA support
 * 
 * @package OGULCAN_Theme
 * @requirements 11.4
 */

/* ==========================================================================
   Skip Links
   ========================================================================== */

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: calc(var(--z-tooltip) + 100);
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Screen reader only text */
.screen-reader-text,
.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;
}

/* Show on focus for skip links */
.screen-reader-text:focus,
.sr-only:focus {
    position: static !important;
    width: auto !important;
    height: auto !important;
    padding: var(--space-sm) var(--space-md) !important;
    margin: 0 !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: normal !important;
    background-color: var(--color-primary);
    color: var(--color-white);
    z-index: calc(var(--z-tooltip) + 100);
}

/* ==========================================================================
   Focus States - Enhanced Visibility
   ========================================================================== */

/* Global focus visible */
:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 3px;
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* Links focus state */
a:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Button focus states */
.btn:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(255, 109, 0, 0.2);
}

.btn--primary:focus-visible {
    outline-color: var(--color-white);
    box-shadow: 0 0 0 6px rgba(255, 109, 0, 0.4);
}

/* Form input focus states */
.form-input:focus-visible {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 35, 126, 0.15);
}

/* Navigation link focus */
.main-navigation a:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* Card focus states */
.card:focus-within,
.portfolio-card:focus-within {
    outline: 3px solid var(--color-secondary);
    outline-offset: 4px;
}

.card__link:focus-visible,
.portfolio-card__link:focus-visible {
    outline: none;
}

/* Menu toggle focus */
.menu-toggle:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* Social links focus */
.social-links a:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 4px;
    border-radius: var(--radius-full);
}

/* ==========================================================================
   High Contrast Mode Support
   ========================================================================== */

@media (prefers-contrast: high) {
    :focus-visible {
        outline: 3px solid currentColor;
        outline-offset: 3px;
    }
    
    .btn {
        border-width: 3px;
    }
    
    .form-input {
        border-width: 3px;
    }
    
    .card,
    .portfolio-card {
        border: 2px solid currentColor;
    }
}

/* ==========================================================================
   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;
    }
    
    .skip-link {
        transition: none;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .card:hover,
    .portfolio-card:hover {
        transform: none;
    }
}

/* ==========================================================================
   ARIA States
   ========================================================================== */

/* Hidden elements */
[aria-hidden="true"] {
    display: none !important;
}

/* Expanded/collapsed states */
[aria-expanded="false"] + .submenu,
[aria-expanded="false"] + .dropdown-menu {
    display: none;
}

[aria-expanded="true"] + .submenu,
[aria-expanded="true"] + .dropdown-menu {
    display: block;
}

/* Current page indicator */
[aria-current="page"] {
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
}

/* Disabled state */
[aria-disabled="true"],
[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Busy/loading state */
[aria-busy="true"] {
    cursor: wait;
}

/* Invalid form fields */
[aria-invalid="true"] {
    border-color: var(--color-error) !important;
}

[aria-invalid="true"]:focus-visible {
    box-shadow: 0 0 0 4px rgba(244, 67, 54, 0.2);
}

/* ==========================================================================
   Keyboard Navigation Indicators
   ========================================================================== */

/* Tab focus ring for interactive elements */
button:focus-visible,
[role="button"]:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Interactive element minimum touch target */
button,
[role="button"],
a,
input[type="checkbox"],
input[type="radio"] {
    min-height: 44px;
    min-width: 44px;
}

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

/* ==========================================================================
   Color Contrast Helpers
   ========================================================================== */

/* Ensure sufficient contrast for text on images */
.text-on-image {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

/* Dark overlay for text readability */
.overlay-dark::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.7) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        transparent 100%
    );
    pointer-events: none;
}

/* ==========================================================================
   Form Accessibility
   ========================================================================== */

/* Required field indicator */
.form-label[data-required]::after,
.required-indicator {
    content: ' *';
    color: var(--color-error);
    font-weight: var(--font-weight-bold);
}

/* Error message association */
.form-error[role="alert"] {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

/* Help text */
.form-help {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ==========================================================================
   Live Region Styles
   ========================================================================== */

/* Announcement regions */
[role="status"],
[role="alert"],
[aria-live] {
    /* Ensure these are visible when content changes */
}

/* Toast/notification styles */
.toast[role="alert"] {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-toast);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.toast--success {
    background-color: var(--color-success);
}

.toast--error {
    background-color: var(--color-error);
}

/* ==========================================================================
   Print Accessibility
   ========================================================================== */

@media print {
    /* Show URLs for links */
    a[href]::after {
        content: ' (' attr(href) ')';
        font-size: 0.8em;
        color: #666;
    }
    
    /* Don't show URLs for internal links */
    a[href^="#"]::after,
    a[href^="javascript:"]::after {
        content: '';
    }
    
    /* Hide non-essential elements */
    .skip-link,
    .menu-toggle,
    nav[role="navigation"] {
        display: none !important;
    }
}