/* ============================================
   Accessibility Styles
   ============================================ */

/* Skip Links */
.skip-link {
    position: absolute;
    top: -100vh;
    left: 0;
    background: var(--color-primary);
    color: var(--color-background);
    padding: 8px 16px;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 4px 0;
    z-index: 100000;
    transition: top 0.2s ease;
    opacity: 0;
    pointer-events: none;
}

.skip-link:focus {
    top: 0;
    opacity: 1;
    pointer-events: auto;
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

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

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

/* Focus Visible Styles (for keyboard navigation) */
*:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* 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;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .site-header {
        border-bottom: 2px solid currentColor;
    }

    .button {
        border: 2px solid currentColor;
    }

    .post-card {
        border: 2px solid currentColor;
    }
}

/* Focus indicators for all interactive elements */
button,
[role="button"],
input,
select,
textarea,
a {
    --focus-ring-color: var(--color-primary);
}

/* Ensure sufficient color contrast */
.color-scheme-Light {
    --contrast-ratio: 4.5;
}

.color-scheme-Dark {
    --contrast-ratio: 7;
}

/* ARIA live region styling */
#aria-announcer {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}