/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced Focus Styles for Keyboard Navigation */
.btn:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(102, 126, 234, 0.2);
}

input:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Interactive Element States */
.task-item:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

section:focus-within {
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        border: 2px solid #fff;
    }

    .task-item {
        border: 2px solid #000;
    }
}

/*
===== ACCESSIBILITY STYLES ===== */

/* Focus Styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast focus for buttons */
.btn:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 1px var(--white), 0 0 0 4px var(--primary-color);
}

/* Task item focus styles */
.task-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    background-color: var(--bg-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Message accessibility styles */
.message {
    position: relative;
    padding-right: 40px; /* Space for close button */
}

.message-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
    transition: opacity var(--transition-normal);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.message-close:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.1);
}

.message-close:focus {
    outline: 2px solid currentColor;
    outline-offset: 1px;
    opacity: 1;
}

/* Manual post text accessibility */
.manual-post-text {
    border: 2px solid var(--info-color);
}

.manual-post-content:focus {
    outline: 2px solid var(--info-color);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Reduced motion preferences */
@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) {
    :root {
        --primary-color: #0000ff;
        --success-color: #008000;
        --danger-color: #ff0000;
        --text-primary: #000000;
        --bg-primary: #ffffff;
        --bg-secondary: #ffffff;
    }

    .btn {
        border: 2px solid currentColor;
    }

    .task-item {
        border: 2px solid var(--text-primary);
    }
}

/* 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: 0;
}

/* Keyboard navigation indicators */
.task-item[tabindex]:focus-within {
    background-color: var(--bg-accent);
    border-color: var(--primary-color);
}

/* Error state accessibility */
.form-group input[aria-invalid="true"] {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25);
}

/* Loading state accessibility */
.btn[aria-busy="true"] {
    position: relative;
}

.btn[aria-busy="true"]::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Touch target size for mobile accessibility */
@media (max-width: 768px) {
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .task-item .btn {
        padding: var(--spacing-md);
    }
}