/* Accessibility Styles for iiko Integration Platform */

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

/* Skip link improvements */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-color);
    color: var(--white);
    padding: 8px 16px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 10000;
    font-weight: 600;
    transition: top 0.3s ease;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000;
        --secondary-color: #333;
        --accent-color: #0066cc;
        --background-color: #fff;
        --white: #fff;
        --border-color: #000;
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .form-control {
        border: 2px solid var(--border-color);
    }
    
    .card {
        border: 2px solid var(--border-color);
    }
}

/* 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;
    }
    
    .alert {
        animation: none;
    }
    
    .side-menu {
        transition: none;
    }
    
    .burger div {
        transition: none;
    }
}

/* 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;
}

/* ARIA live regions */
[aria-live] {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Focus visible for keyboard navigation */
.focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Button and link focus states */
.btn:focus,
a:focus,
button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Form field focus states */
.form-control:focus,
.form-select:focus,
textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-color: var(--accent-color);
}

/* Error states for form validation */
.form-control.is-invalid {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25);
}

.form-control.is-valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 2px rgba(40, 167, 69, 0.25);
}

/* Field error messages */
.field-error {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* Loading states */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Disabled states */
.btn:disabled,
.form-control:disabled,
.form-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Alert accessibility */
.alert {
    position: relative;
    padding-right: 3rem;
}

.alert-close {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: inherit;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

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

/* Table accessibility */
.table {
    border-collapse: collapse;
}

.table th {
    position: relative;
}

.table th::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
}

/* Navigation accessibility */
.side-menu a {
    position: relative;
}

.side-menu a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.side-menu a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent-color);
}

/* Burger menu accessibility */
.burger {
    position: relative;
}

.burger:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.burger[aria-expanded="true"] {
    background: var(--background-color);
}

/* Color contrast improvements */
@media (prefers-color-scheme: dark) {
    .text-muted {
        color: #adb5bd !important;
    }
    
    .form-text {
        color: #adb5bd !important;
    }
}

/* Print styles */
@media print {
    .side-menu,
    .burger,
    .alerts-container,
    .btn {
        display: none !important;
    }
    
    main {
        margin-left: 0 !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .table th {
        background: #f0f0f0 !important;
        color: #000 !important;
    }
}

/* Large text support */
@media (prefers-reduced-motion: no-preference) {
    .btn:hover {
        transform: translateY(-1px);
    }
    
    .card:hover {
        transform: translateY(-2px);
    }
}

/* Custom scrollbar for better accessibility */
.side-menu::-webkit-scrollbar {
    width: 8px;
}

.side-menu::-webkit-scrollbar-track {
    background: var(--background-color);
}

.side-menu::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.side-menu::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Focus management for modals and overlays */
.modal-open {
    overflow: hidden;
}

/* Keyboard navigation improvements */
[tabindex="-1"]:focus {
    outline: none;
}

/* Semantic HTML improvements */
main {
    outline: none;
}

/* ARIA expanded states */
[aria-expanded="true"] .burger div:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

[aria-expanded="true"] .burger div:nth-child(2) {
    opacity: 0;
}

[aria-expanded="true"] .burger div:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Screen reader announcements */
.sr-announce {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* High contrast focus indicators */
@media (prefers-contrast: high) {
    *:focus {
        outline: 3px solid #000;
        outline-offset: 2px;
    }
    
    .btn:focus,
    a:focus,
    button:focus {
        outline: 3px solid #000;
        outline-offset: 2px;
    }
}