/* ==========================================================================
   WCAG 2.1 AA Accessibility Styles
   ========================================================================== */

/* Skip Navigation Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 10000;
    font-weight: 600;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Screen Reader Only Text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Visible Styles - High Contrast */
*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

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

/* Improved Focus Styles for Interactive Elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Navigation Focus Styles */
.nav-link:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
    background: transparent;
}

/* Button Focus Styles with Better Contrast */
.btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
    box-shadow: 0 0 0 3px var(--primary), var(--shadow-lg);
}

/* Blue buttons on white backgrounds: black focus ring for clear boundary */
.btn-primary:focus-visible {
    outline-color: var(--text-dark);
    box-shadow: 0 0 0 3px var(--text-dark), var(--shadow-lg);
}

/* Blue buttons on dark backgrounds: white focus ring for contrast */
.hero .btn-primary:focus-visible,
.cta-section .btn-primary:focus-visible {
    outline-color: var(--text-white);
    box-shadow: 0 0 0 3px var(--text-white), var(--shadow-lg);
}

/* Header nav CTA: keep blue accent like other nav links */
.nav-link.cta-button:focus-visible {
    outline-color: var(--primary);
}

/* Placeholder Contrast - WCAG AA (4.5:1) */
input::placeholder,
textarea::placeholder {
    color: #757575 !important;
    opacity: 1 !important;
}

input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
    color: #757575 !important;
    opacity: 1 !important;
}

input::-moz-placeholder,
textarea::-moz-placeholder {
    color: #757575 !important;
    opacity: 1 !important;
}

input:-ms-input-placeholder,
textarea:-ms-input-placeholder {
    color: #757575 !important;
    opacity: 1 !important;
}

/* Select dropdown placeholder option styling */
select {
    color: #1a1a1a !important;
    background-color: #ffffff !important;
    border: 1px solid #cbd5e1 !important;
    padding: 12px 16px !important;
    font-size: 16px !important;
}

select option {
    color: #1a1a1a !important;
    background-color: #ffffff !important;
    padding: 8px 12px;
}

select option[value=""] {
    color: #757575 !important;
}

select option:not([value=""]) {
    color: #1a1a1a !important;
    font-weight: 500;
}

/* For browsers that support :invalid pseudo-class on select with required */
select:invalid {
    color: #757575 !important;
}

select:valid {
    color: #1a1a1a !important;
}

/* Select focus state */
select:focus {
    outline: 3px solid var(--primary) !important;
    outline-offset: 2px !important;
    border-color: var(--primary) !important;
}

/* Select hover state */
select:hover {
    border-color: #64748b !important;
}

/* Form Error Messages */
.error-message {
    display: block;
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    min-height: 1.2em;
}

.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
    border-color: #dc3545;
    background-color: #fff5f5;
    color: var(--text-dark) !important;
}

.form-group.has-error label {
    color: #dc3545;
}

/* Required Field Indicator */
abbr[title] {
    text-decoration: none;
    color: #dc3545;
    font-weight: bold;
}

/* Ensure High Contrast for Text */
body {
    color: #1a1a1a;
    background: #ffffff;
}

/* Homepage contact form: prevent admin.css form styles bleeding into public form */
#contact .form-group input,
#contact .form-group select,
#contact .form-group textarea {
    background: var(--bg-white) !important;
    color: var(--text-dark) !important;
    border: 2px solid rgba(0, 102, 204, 0.3) !important;
}

#contact .form-group input:focus,
#contact .form-group select:focus,
#contact .form-group textarea:focus {
    background: var(--bg-white) !important;
}

/* Link Contrast */
a {
    color: #0066cc;
    text-decoration-skip-ink: auto;
}

a:hover,
a:focus {
    color: #004499;
}

/* Ensure Loading Screen is Accessible */
.loader[role="status"] {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hamburger Button Accessibility */
.hamburger {
    background: transparent;
    border: 2px solid transparent;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
}

.hamburger:hover {
    background: transparent;
    background: color-mix(in srgb, var(--primary) 12%, transparent);
}

.hamburger:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
    border-color: var(--primary);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Back to Top Button */
.back-to-top:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
    transform: translateY(-5px) scale(1.1);
}

/* Improved Contrast for Disabled States */
button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: #e9ecef;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    * {
        border-width: 2px;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .nav-link {
        border-bottom: 2px solid transparent;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        border-bottom-color: currentColor;
    }
}

/* Reduced Motion for Users with Vestibular Disorders */
@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;
    }
    
    .hero-video {
        animation: none !important;
    }
    
    .loader-bar {
        animation: none !important;
    }
}

/* Print Styles for Accessibility */
@media print {
    .skip-link,
    .hamburger,
    .back-to-top,
    .hero-video,
    .loader {
        display: none !important;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
    
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
}

/* Touch Target Size - WCAG 2.5.5 */
@media (pointer: coarse) {
    a,
    button,
    input,
    textarea,
    select {
        min-height: 44px;
        min-width: 44px;
    }
    
    .nav-link {
        padding: 12px 20px;
    }
    
    .btn {
        padding: 14px 28px;
    }
}

/* Dark Mode Support with Proper Contrast */
@media (prefers-color-scheme: dark) {
    body {
        background: #1a1a1a;
        color: #f5f5f5;
    }
    
    a {
        color: #66b3ff;
    }
    
    a:hover,
    a:focus {
        color: #99ccff;
    }
    
    .error-message {
        color: #ff6b6b;
    }
    
    .form-group.has-error input,
    .form-group.has-error textarea,
    .form-group.has-error select {
        background-color: #2d1f1f;
        border-color: #ff6b6b;
    }
    
    input,
    textarea,
    select {
        background: #2a2a2a;
        color: #f5f5f5;
        border-color: #444;
    }
}

/* Language Direction Support */
[dir="rtl"] .skip-link {
    left: auto;
    right: 0;
    border-radius: 0 0 0 4px;
}

/* Keyboard Navigation Indicator */
body.user-is-tabbing *:focus {
    outline: none;
}

body.user-is-tabbing *:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}