/* Accessibility Improvements */

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: #3b82f6;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100000;
    border-radius: 0 0 4px 0;
}

.skip-to-main:focus {
    top: 0;
}

/* Focus indicators */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

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

*:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    * {
        border-color: currentColor !important;
    }

    a {
        text-decoration: underline;
    }
}

/* 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;
    }
}

/* Screen reader only content */
.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;
}

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

/* Ensure sufficient color contrast */
a {
    color: #2563eb;
    /* WCAG AA compliant */
}

a:hover {
    color: #1d4ed8;
}

/* Button contrast */
.btn-primary {
    background: #3b82f6;
    color: #fff;
    border: none;
}

.btn-secondary {
    background: #6b7280;
    color: #fff;
    border: none;
}

/* Form labels */
label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    color: #374151;
}

/* Required field indicator */
.required::after {
    content: " *";
    color: #ef4444;
}

/* Error messages */
.error-message,
.form-error {
    color: #dc2626;
    font-size: 14px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.error-message::before {
    content: "⚠";
}

/* Success messages */
.success-message {
    color: #059669;
    font-size: 14px;
    margin-top: 4px;
}

/* Disabled state */
button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Loading state */
[aria-busy="true"] {
    cursor: wait;
    opacity: 0.7;
}

/* Tooltips */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    margin-bottom: 4px;
}

[data-tooltip]:hover::after,
[data-tooltip]:focus::after {
    opacity: 1;
}

/* Ensure images have alt text */
img:not([alt]) {
    outline: 2px solid #ef4444;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1f2937;
        --text-color: #f3f4f6;
        --border-color: #374151;
    }

    body {
        background: var(--bg-color);
        color: var(--text-color);
    }

    a {
        color: #60a5fa;
    }
}