/* ==============================================
   DRY ALLE - ACCESSIBILITY COMPONENT
   MIT Architecture Compatible
   WCAG 2.1 AA Compliance - Merkezi Erişilebilirlik Sistemi
   ============================================== */

/* CSS Custom Properties - Mevcut variables.css ile uyumlu */
:root {
    --accessibility-primary: var(--primary-green, #006a44);
    --accessibility-focus-shadow: rgba(0, 106, 68, 0.3);
    --accessibility-error: #dc3545;
    --accessibility-text-muted: #718096;
    --accessibility-text-light: #4a5568;
    --accessibility-focus-width: 2px;
    --accessibility-touch-target: 44px;
}

/* ==============================================
   1. SKIP NAVIGATION - Keyboard Users
   ============================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accessibility-primary);
    color: white;
    padding: 8px 12px;
    text-decoration: none;
    z-index: 1000;
    font-weight: 600;
    border-radius: 4px;
    font-size: 14px;
    transition: top 0.15s ease-in-out;
}

.skip-link:focus {
    top: 6px;
}

/* ==============================================
   2. FOCUS MANAGEMENT - Keyboard Navigation
   ============================================== */

/* Universal Focus Reset - Clean slate */
*:focus {
    outline: none;
}

/* Focus States for Interactive Elements */
.nav-menu a:focus,
.cta-button:focus,
.contact-button:focus,
.btn:focus,
button:focus,
input:focus,
textarea:focus,
select:focus,
.pricing-category-link:focus,
[tabindex]:focus {
    outline: var(--accessibility-focus-width) solid var(--accessibility-primary);
    outline-offset: var(--accessibility-focus-width);
    border-radius: 4px;
}

/* Enhanced Focus for Critical Actions */
.cta-button:focus,
.contact-button:focus,
[href^="tel:"]:focus,
[href*="whatsapp"]:focus {
    box-shadow: 0 0 0 3px var(--accessibility-focus-shadow);
}

/* ==============================================
   3. SCREEN READER SUPPORT
   ============================================== */

.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;
}

/* ==============================================
   4. FORM ACCESSIBILITY - MIT Compatible
   ============================================== */

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--text-dark, #333);
}

.required {
    color: var(--accessibility-error);
    font-weight: bold;
}

.form-help {
    font-size: 0.875rem;
    color: var(--accessibility-text-muted);
    margin-top: 4px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-error {
    color: var(--accessibility-error);
    font-size: 0.875rem;
    margin-top: 4px;
    display: flex;
    align-items: center;
}

.form-error::before {
    content: "⚠️";
    margin-right: 4px;
}

/* Input Validation States */
input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"] {
    border-color: var(--accessibility-error);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

/* ==============================================
   5. INTERACTIVE STATES
   ============================================== */

/* Disabled States */
button[disabled],
.btn[disabled],
.cta-button[disabled],
input[disabled],
textarea[disabled],
select[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* ==============================================
   6. COLOR CONTRAST & TYPOGRAPHY
   ============================================== */

.text-light {
    color: var(--accessibility-text-light);
}

.text-muted {
    color: var(--accessibility-text-muted);
}

/* Enhanced Link Accessibility */
a {
    color: var(--accessibility-primary);
    text-decoration: underline;
    text-decoration-color: transparent;
    transition: text-decoration-color 0.2s ease;
}

a:hover,
a:focus {
    color: var(--primary-dark, #004d32);
    text-decoration-color: currentColor;
}

/* ==============================================
   7. MOBILE TOUCH TARGETS - WCAG AAA
   ============================================== */

@media (max-width: 768px) {
    /* Minimum 44px touch targets */
    .contact-button,
    .cta-button,
    .nav-menu a,
    button,
    .btn,
    [role="button"],
    [tabindex="0"] {
        min-height: var(--accessibility-touch-target);
        min-width: var(--accessibility-touch-target);
        padding: 12px 16px;
        position: relative;
    }
    
    /* Phone and WhatsApp links */
    [href^="tel:"],
    [href*="whatsapp"],
    .phone-link,
    .whatsapp-link {
        display: inline-flex;
        align-items: center;
        min-height: var(--accessibility-touch-target);
        padding: 8px 12px;
    }
}

/* ==============================================
   8. LOADING & ANIMATION STATES
   ============================================== */

.loading {
    position: relative;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--bg-gray-300, #e2e8f0);
    border-top: 2px solid var(--accessibility-primary);
    border-radius: 50%;
    animation: accessibility-spin 1s linear infinite;
}

@keyframes accessibility-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==============================================
   9. PROGRESSIVE ENHANCEMENT - User Preferences
   ============================================== */

/* Reduced Motion Accessibility */
@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;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .cta-button,
    .contact-button,
    .btn {
        border: 2px solid currentColor;
        background: transparent;
        color: var(--accessibility-primary);
    }
    
    .nav-menu a {
        border-bottom: 1px solid transparent;
        font-weight: 600;
    }
    
    .nav-menu a:hover,
    .nav-menu a:focus {
        border-bottom-color: currentColor;
        background: var(--accessibility-primary);
        color: white;
    }
}

/* ==============================================
   10. COMPONENT FOCUS MANAGEMENT
   ============================================== */

/* Focus Within for Complex Components */
.pricing-sidebar:focus-within,
.service-sidebar:focus-within,
.blog-sidebar:focus-within {
    box-shadow: 0 0 0 2px var(--accessibility-focus-shadow);
    border-radius: 8px;
}

/* ==============================================
   11. ARIA LIVE REGIONS - Dynamic Content
   ============================================== */

.sr-live-polite {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
}

/* Search Results Announcement */
.search-results-announcement {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ==============================================
   MIT ARCHITECTURE INTEGRATION COMPLETE
   Tüm accessibility özellikler merkezi olarak yönetiliyor
   ============================================== */