/* ============================================
   ACCESSIBILITY
   Accessibility toolbar and enhanced features
   ============================================ */

/* Accessibility Toolbar */
.a11y-toolbar {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--z-fixed);
}

[dir="ltr"] .a11y-toolbar {
    left: auto;
    right: 20px;
}

.a11y-toolbar__toggle {
    width: 50px;
    height: 50px;
    background: white;
    border: 2px solid var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all var(--transition);
}

.a11y-toolbar__toggle:hover {
    background: var(--color-secondary);
    transform: scale(1.1);
}

.a11y-toolbar__toggle:hover .a11y-icon {
    color: white;
}

.a11y-icon {
    font-size: 1.5rem;
}

.a11y-toolbar__panel {
    position: absolute;
    bottom: 60px;
    left: 0;
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    min-width: 200px;
}

[dir="ltr"] .a11y-toolbar__panel {
    left: auto;
    right: 0;
}

.a11y-toolbar__panel[hidden] {
    display: none;
}

.a11y-toolbar__title {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

.a11y-toolbar__controls {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
}

.a11y-btn {
    padding: var(--spacing-sm);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 600;
}

.a11y-btn:hover {
    background: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}

.a11y-btn:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Font Size Adjustments */
body.font-size-large {
    font-size: 1.125rem;
}

body.font-size-larger {
    font-size: 1.25rem;
}

body.font-size-largest {
    font-size: 1.375rem;
}

body.font-size-small {
    font-size: 0.875rem;
}

/* High Contrast Mode */
body.high-contrast {
    --color-bg: #000;
    --color-text: #fff;
    --color-bg-alt: #1a1a1a;
    --color-border: #fff;
    --color-primary: #fff;
    --color-secondary: #7c9eff;
    --color-accent: #a78bfa;
    --color-text-light: #c0c0c0;
}

body.high-contrast .header,
body.high-contrast .footer {
    background: #000;
    border-bottom: 2px solid #fff;
}

body.high-contrast .nav__link {
    color: #fff;
}

body.high-contrast .hero {
    background: #000;
    border: 2px solid #fff;
}

body.high-contrast .about-hero {
    background: #000;
    border: 2px solid #fff;
}

body.high-contrast .about-hero::after {
    background: rgba(0, 0, 0, 0.65);
}

/* Buttons - use blue gradient that works on dark backgrounds */
body.high-contrast .btn--primary {
    background: linear-gradient(135deg, #7c9eff, #a78bfa);
    color: #000;
}

body.high-contrast .btn--secondary {
    border-color: #7c9eff;
    color: #7c9eff;
}

body.high-contrast .btn--secondary:hover {
    background: #7c9eff;
    color: #000;
}

/* Cards and containers */
body.high-contrast .card,
body.high-contrast .question,
body.high-contrast .principle-card,
body.high-contrast .staff-card,
body.high-contrast .board-card,
body.high-contrast .alumni-card,
body.high-contrast .team-card,
body.high-contrast .publication-card,
body.high-contrast .event-card,
body.high-contrast .topic-section,
body.high-contrast .membership,
body.high-contrast .updates-tabs__content {
    background: #1a1a1a;
    border: 2px solid #fff;
}

body.high-contrast .publications-expander {
    background: #1a1a1a;
    border: 2px solid #fff;
}

body.high-contrast .publications-expander__dots span {
    background: #fff;
}

/* Text colors for all elements */
body.high-contrast .card__heading,
body.high-contrast .card__content,
body.high-contrast .question__text,
body.high-contrast .principle-card__title,
body.high-contrast .principle-card__content,
body.high-contrast .staff-card__name,
body.high-contrast .staff-card__bio,
body.high-contrast .board-card__name,
body.high-contrast .team-card__name,
body.high-contrast .team-card__bio,
body.high-contrast .topic-section__heading,
body.high-contrast .topic-section__content,
body.high-contrast .publication-card__title,
body.high-contrast .publication-card__authors,
body.high-contrast .event-card__title,
body.high-contrast .event-card__description,
body.high-contrast .membership__heading,
body.high-contrast .membership__content,
body.high-contrast .updates-panel__title,
body.high-contrast .updates-panel__body,
body.high-contrast .section__text,
body.high-contrast .section__intro,
body.high-contrast .about-hero__heading,
body.high-contrast .team-board__heading,
body.high-contrast .prose,
body.high-contrast .prose h2,
body.high-contrast .prose h3 {
    color: #fff;
}

/* Secondary text colors */
body.high-contrast .staff-card__role,
body.high-contrast .board-card__role,
body.high-contrast .alumni-card__role,
body.high-contrast .team-card__role,
body.high-contrast .updates-panel__date,
body.high-contrast .section__eyebrow {
    color: #7c9eff;
}

/* Links */
body.high-contrast a,
body.high-contrast .staff-card__email,
body.high-contrast .publication-card__link,
body.high-contrast .prose a {
    color: #7c9eff;
}

body.high-contrast a:hover {
    color: #a78bfa;
}

/* Form inputs */
body.high-contrast .contact-form input,
body.high-contrast .contact-form textarea {
    background: #1a1a1a;
    color: #fff;
    border-color: #fff;
}

body.high-contrast .contact-form input::placeholder,
body.high-contrast .contact-form textarea::placeholder {
    color: #888;
}

/* Updates tabs */
body.high-contrast .updates-tab {
    color: #fff;
}

body.high-contrast .updates-tab:hover {
    background: #333;
}

body.high-contrast .updates-tab[aria-selected="true"] {
    background: linear-gradient(135deg, #7c9eff, #a78bfa);
    color: #000;
}

/* Logo containers keep transparent/dark logo artwork legible on black. */
body.high-contrast .nav__logo img,
body.high-contrast .footer__logo,
body.high-contrast .logo-item,
body.high-contrast .membership__logos img {
    background: #fff;
    border-radius: 6px;
}

body.high-contrast .nav__logo img,
body.high-contrast .footer__logo,
body.high-contrast .membership__logos img {
    padding: 0.35rem;
    box-sizing: border-box;
}

body.high-contrast .logo-item img,
body.high-contrast .membership__logos img,
body.high-contrast .nav__logo img,
body.high-contrast .footer__logo {
    filter: none !important;
}

body.high-contrast .card__icon,
body.high-contrast .question__icon {
    background: #000;
    border: 1px solid #fff;
    box-shadow: none;
}

/* Lottie artwork uses fixed JSON colors, so normalize it for the dark
   high-contrast surface. */
body.high-contrast lottie-player.card__icon,
body.high-contrast lottie-player.question__icon {
    /* The filter affects the whole custom element, including its box. Start
       from white here so the rendered high-contrast result remains black. */
    background: #fff;
    border-color: #000;
    filter: brightness(0) invert(1);
}

body.high-contrast .principle-card__icon--econ-shift-readable {
    color: #fff;
}

/* Keep normal contrast for profile/content images */
body.high-contrast .staff-card__image,
body.high-contrast .board-card__image,
body.high-contrast .team-card__image,
body.high-contrast .event-card__image,
body.high-contrast .section__media img {
    filter: none;
}

body.high-contrast img {
    filter: none;
}

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

.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Focus Indicators */
:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
}

body.high-contrast :focus-visible {
    outline-color: #ffd700;
    outline-width: 4px;
}

/* Keyboard Navigation Helpers */
.keyboard-nav *:focus {
    outline: 3px solid var(--color-secondary) !important;
    outline-offset: 2px !important;
}

/* Link Underlines (optional for accessibility) */
body.underline-links a {
    text-decoration: underline;
}

/* Readable Font (optional dyslexia-friendly mode) */
body.readable-font {
    --font-primary: 'Comic Sans MS', 'OpenDyslexic', sans-serif;
}

/* Mobile Accessibility */
@media (max-width: 768px) {
    .a11y-toolbar {
        left: 10px;
        bottom: 10px;
        top: auto;
        transform: none;
    }
    
    [dir="ltr"] .a11y-toolbar {
        left: auto;
        right: 10px;
    }
    
    .a11y-toolbar__panel {
        bottom: 60px;
        left: 0;
    }
    
    [dir="ltr"] .a11y-toolbar__panel {
        left: auto;
        right: 0;
    }
}

/* Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    .a11y-toolbar__toggle,
    .a11y-btn,
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* Print Accessibility */
@media print {
    .a11y-toolbar {
        display: none;
    }
    
    body.high-contrast {
        filter: none;
    }
}

/* Touch Target Sizes */
@media (pointer: coarse) {
    .a11y-btn,
    .nav__link,
    .btn {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Color Blind Modes (optional enhancement) */
body.deuteranopia {
    filter: url('#deuteranopia-filter');
}

body.protanopia {
    filter: url('#protanopia-filter');
}

body.tritanopia {
    filter: url('#tritanopia-filter');
}