/* Accessibility Styles */

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    z-index: 10000;
    transition: top 0.3s ease;
}

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

/* Focus Indicators */
.focused, 
a:focus, 
button:focus, 
input:focus, 
select:focus, 
textarea:focus,
[tabindex]:focus {
    outline: 3px solid var(--accent-color) !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 5px rgba(0, 122, 255, 0.3) !important;
}

/* High Contrast Mode */
.high-contrast {
    filter: contrast(150%) brightness(120%);
}

.high-contrast * {
    text-shadow: none !important;
    box-shadow: none !important;
}

.high-contrast .dropdown-menu {
    background: #ffffff !important;
    border: 2px solid #000000 !important;
}

.high-contrast .dropdown-item:hover {
    background: #000000 !important;
    color: #ffffff !important;
}

.high-contrast .sanpham {
    border: 2px solid #000000 !important;
}

.high-contrast .sanpham:hover {
    background: #f0f0f0 !important;
}

/* Contrast Toggle Button */
.contrast-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.contrast-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.contrast-toggle:focus {
    outline: 3px solid #ffffff;
    outline-offset: 2px;
}

/* 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;
}

/* Live Region */
.live-region {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Better focus for dropdown items */
.dropdown-item:focus {
    background: var(--accent-color) !important;
    color: white !important;
    outline: 2px solid #ffffff !important;
    outline-offset: -2px !important;
}

/* Keyboard navigation indicators */
[tabindex="0"]:focus,
.sanpham:focus,
.product-card:focus {
    outline: 3px solid var(--accent-color) !important;
    outline-offset: 2px !important;
    transform: scale(1.02);
    transition: transform 0.2s ease;
}

/* Better button states */
button[aria-pressed="true"] {
    background: var(--primary-color) !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2) !important;
}

/* Dropdown accessibility */
.dropdown-toggle[aria-expanded="true"] {
    background: rgba(0, 122, 255, 0.1) !important;
    color: var(--accent-color) !important;
}

.dropdown-menu[aria-hidden="true"] {
    display: none !important;
}

/* Text alternatives for icons */
.top-right::after {
    content: " - " attr(title);
    font-size: 0.8em;
    font-weight: normal;
}

/* Improved link states */
a:hover, a:focus {
    text-decoration: underline !important;
    background: rgba(0, 122, 255, 0.1) !important;
    border-radius: 2px !important;
    padding: 1px 2px !important;
}

/* Form accessibility improvements */
input, select, textarea {
    border: 2px solid var(--border-color) !important;
    padding: 0.8rem !important;
    border-radius: 4px !important;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent-color) !important;
    background: rgba(0, 122, 255, 0.05) !important;
}

input:invalid {
    border-color: #dc3545 !important;
    background: rgba(220, 53, 69, 0.05) !important;
}

/* Motion reduction for users with vestibular disorders */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        transform: none !important;
    }
    
    .slides {
        animation: none !important;
    }
}

/* Dark mode accessibility */
@media (prefers-color-scheme: dark) {
    .skip-link {
        background: #ffffff;
        color: #000000;
    }
    
    .contrast-toggle {
        background: #ffffff;
        color: #000000;
    }
}

/* Print accessibility */
@media print {
    .skip-link,
    .contrast-toggle,
    .dropdown-menu,
    .cart-notification {
        display: none !important;
    }
    
    a::after {
        content: " (" attr(href) ") ";
        font-size: 0.8em;
        color: #666;
    }
    
    a[href^="tel:"]:after,
    a[href^="mailto:"]:after,
    a[href^="#"]:after {
        content: "";
    }
}