/**
 * Accessibility CSS - Blog Parceiros iFood
 * 
 * Estilos para melhorar acessibilidade e UX
 * - Skip links funcionais
 * - Focus indicators melhorados
 * - Screen reader utilities
 * - High contrast support
 * 
 * @version 1.0.0
 */

/* Skip Links - Totalmente invisíveis até o foco */
.ifp-skip-links {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999999;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.ifp-skip-link {
    position: absolute !important;
    left: -10000px !important;
    top: auto !important;
    width: 1px !important;
    height: 1px !important;
    overflow: hidden !important;
    padding: 8px 16px;
    background: var(--ifp-color-primary, #EB0033);
    color: white !important;
    text-decoration: none !important;
    font-weight: 600;
    font-size: 14px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    margin: 4px;
}

.ifp-skip-link:focus {
    position: fixed !important;
    left: 20px !important;
    top: 20px !important;
    width: auto !important;
    height: auto !important;
    overflow: visible !important;
    outline: 2px solid #fff;
    outline-offset: 2px;
    z-index: 999999;
}

.ifp-skip-link:hover:focus {
    background: var(--ifp-color-secondary, #2D3748);
}

/* Screen Reader Only Content */
.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;
}

.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static !important;
    width: auto !important;
    height: auto !important;
    padding: inherit !important;
    margin: inherit !important;
    overflow: visible !important;
    clip: auto !important;
    white-space: inherit !important;
}

/* Focus Indicators Melhorados */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus,
[tabindex]:focus {
    outline: 2px solid var(--ifp-color-primary, #EB0033) !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(235, 0, 51, 0.2) !important;
}

/* Focus específico para elementos interativos do tema - Apenas outline */
.ifp-toc-link:focus,
.ifp-breadcrumb a:focus,
.ifp-meta-tag:focus,
.ifp-floating-btn:focus {
    outline: 2px solid var(--ifp-color-primary, #EB0033) !important;
    outline-offset: 2px !important;
}

/* Melhor contraste para links - sem alterar estilos existentes */
a {
    text-decoration-skip-ink: auto;
}

/* Focus para botões customizados */
.ifp-comments-toggle-new:focus,
.ifp-floating-btn--toggle:focus {
    transform: scale(1.05);
    box-shadow: 0 0 0 4px rgba(235, 0, 51, 0.3) !important;
}

/* Focus para meta tags - sem alterar estilos padrão */
.ifp-meta-tag:focus {
    outline: 2px solid var(--ifp-color-primary, #EB0033) !important;
    outline-offset: 2px !important;
}

/* Lista acessível */
[role="list"] {
    list-style-position: inside;
}

[role="list"] li {
    margin-bottom: 0.5rem;
}

/* TOC acessível - apenas focus, sem alterar estilos */
.ifp-toc-link:focus {
    outline: 2px solid var(--ifp-color-primary, #EB0033) !important;
    outline-offset: 2px !important;
}

/* Breadcrumb acessível - apenas focus, sem alterar estilos */
.ifp-breadcrumb a:focus {
    outline: 2px solid var(--ifp-color-primary, #EB0033) !important;
    outline-offset: 2px !important;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .ifp-skip-link {
        background: #000 !important;
        color: #fff !important;
        border: 2px solid #fff;
    }
    
    a:focus,
    button:focus,
    input:focus,
    textarea:focus,
    select:focus,
    [tabindex]:focus {
        outline: 3px solid #000 !important;
        outline-offset: 2px !important;
        box-shadow: none !important;
    }
    
    /* High contrast apenas para focus states */
    .ifp-toc-link:focus,
    .ifp-breadcrumb a:focus,
    .ifp-meta-tag:focus {
        outline: 3px solid #000 !important;
        outline-offset: 2px !important;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .ifp-skip-link {
        transition: none;
    }
    
    .ifp-toc-link,
    .ifp-breadcrumb a,
    .ifp-meta-tag {
        transition: none;
    }
    
    .ifp-comments-toggle-new:focus,
    .ifp-floating-btn--toggle:focus {
        transform: none;
    }
}

/* Dark Mode Support - apenas skip links */
@media (prefers-color-scheme: dark) {
    .ifp-skip-link {
        background: #fff;
        color: #000 !important;
    }
}

/* Touch Target Size - apenas para skip links */
@media (max-width: 768px) {
    .ifp-skip-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        font-size: 16px; /* Previne zoom no iOS */
    }
}

/* Print Accessibility */
@media print {
    .ifp-skip-links {
        display: none;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 12px;
        color: #666;
    }
    
    a[href^="#"]:after,
    a[href^="javascript:"]:after {
        content: "";
    }
}

/* Focus Within - removido para não alterar estilos visuais */

/* Melhorar visibilidade de elementos interativos */
button,
[role="button"],
input[type="submit"],
input[type="button"] {
    cursor: pointer;
}

button:disabled,
[role="button"][aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Indicadores visuais para screen readers - Específicos para não interferir com menus */
.ifp-comments-content[aria-hidden="true"],
.ifp-floating-buttons__secondary[aria-hidden="true"] {
    display: none;
}

.ifp-comments-content[aria-hidden="false"],
.ifp-floating-buttons__secondary[aria-hidden="false"] {
    display: block;
}

/* Suporte para elementos que usam aria-expanded corretamente */
.ifp-comments-toggle-new[aria-expanded="false"] + .ifp-comments-content {
    display: none;
}

.ifp-comments-toggle-new[aria-expanded="true"] + .ifp-comments-content {
    display: block;
}