/**
 * Accessibility Styles
 * Enhanced keyboard navigation and focus indicators
 * WCAG 2.1 Level AA compliant
 */

/* ========================================
   Skip Links
   ======================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color, #0d6efd);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 4px 0;
    font-weight: 500;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--warning-color, #ffc107);
    outline-offset: 2px;
}

/* ========================================
   Enhanced Focus Indicators
   ======================================== */

/* High contrast focus indicator for all interactive elements */
:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd) !important;
    outline-offset: 2px !important;
    border-radius: 4px;
}

/* Button focus states */
button:focus-visible,
.btn:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd) !important;
    outline-offset: 3px !important;
    box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.15);
}

/* Form control focus states */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd) !important;
    outline-offset: 2px !important;
    border-color: var(--primary-color, #0d6efd) !important;
}

/* Link focus states */
a:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd) !important;
    outline-offset: 2px !important;
    text-decoration: underline;
}

/* Guest counter buttons */
.guest-counter button:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd) !important;
    outline-offset: 2px !important;
    z-index: 1;
}

/* Hotel card focus states */
.hotel-card:focus-within {
    outline: 3px solid var(--focus-color, #0d6efd);
    outline-offset: 2px;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.2);
}

/* ========================================
   Keyboard Shortcuts Indicator
   ======================================== */
.keyboard-shortcuts-help {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    z-index: 9999;
    display: none;
    max-width: 300px;
}

.keyboard-shortcuts-help.show {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

.keyboard-shortcuts-help h4 {
    margin: 0 0 8px 0;
    font-size: 1rem;
    font-weight: 600;
}

.keyboard-shortcuts-help ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.keyboard-shortcuts-help li {
    margin: 4px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.keyboard-shortcuts-help kbd {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.75rem;
    font-family: monospace;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   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;
}

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

/* ========================================
   High Contrast Mode Support
   ======================================== */
@media (prefers-contrast: high) {
    :focus-visible {
        outline-width: 4px !important;
    }
    
    button:focus-visible,
    .btn:focus-visible {
        outline-width: 4px !important;
        box-shadow: 0 0 0 6px rgba(13, 110, 253, 0.25);
    }
}

/* ========================================
   Reduced Motion Support
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    .keyboard-shortcuts-help {
        animation: none;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   Touch Target Size (WCAG 2.5.5)
   ======================================== */
button,
a,
input[type="checkbox"],
input[type="radio"] {
    min-height: 44px;
    min-width: 44px;
}

/* Exception for buttons in button groups */
.btn-group button,
.guest-counter button {
    min-height: 40px;
    min-width: 40px;
}

/* ========================================
   Focus Management for Modals/Dialogs
   ======================================== */
.modal:focus,
.dialog:focus {
    outline: none;
}

.modal [tabindex="-1"]:focus,
.dialog [tabindex="-1"]:focus {
    outline: none;
}

/* ========================================
   Keyboard Navigation Helpers
   ======================================== */
[data-keyboard-focusable="true"] {
    cursor: pointer;
}

[data-keyboard-focusable="true"]:focus-visible {
    outline: 3px solid var(--focus-color, #0d6efd);
    outline-offset: 2px;
}

/* Tab order visualization for debugging (dev only) */
body.show-tab-order [tabindex]:not([tabindex="-1"])::before {
    content: attr(tabindex);
    position: absolute;
    top: -10px;
    left: -10px;
    background: red;
    color: white;
    padding: 2px 6px;
    border-radius: 50%;
    font-size: 10px;
    font-weight: bold;
    z-index: 10000;
}

/* ========================================
   Focus Trap Indicator
   ======================================== */
[data-focus-trapped="true"] {
    position: relative;
}

[data-focus-trapped="true"]::before {
    content: "";
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 2px solid var(--focus-color, #0d6efd);
    border-radius: 8px;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

[data-focus-trapped="true"]::after {
    content: "⌨️ Modo de navegação do formulário ativo (ESC para sair)";
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color, #0d6efd);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    animation: focusTrapFadeIn 0.3s ease-in forwards;
}

@keyframes focusTrapFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Hide focus trap indicator on small screens */
@media (max-width: 768px) {
    [data-focus-trapped="true"]::after {
        display: none;
    }
}

/* ========================================
   Keyboard Shortcuts Help Panel
   ======================================== */

.keyboard-shortcuts-help {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    padding: 0;
    z-index: 10001;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.keyboard-shortcuts-help.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    pointer-events: auto;
}

.keyboard-shortcuts-header {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    padding: 20px 24px;
    border-radius: 12px 12px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.keyboard-shortcuts-header h4 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.keyboard-shortcuts-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 28px;
    line-height: 1;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.keyboard-shortcuts-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.keyboard-shortcuts-close:focus {
    outline: 2px solid white;
    outline-offset: 2px;
}

.keyboard-shortcuts-list {
    list-style: none;
    padding: 24px;
    margin: 0;
}

.keyboard-shortcuts-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid #e9ecef;
    transition: background 0.2s;
}

.keyboard-shortcuts-list li:last-child {
    border-bottom: none;
}

.keyboard-shortcuts-list li:hover {
    background: #f8f9fa;
    border-radius: 6px;
}

.shortcut-label {
    color: #495057;
    font-size: 15px;
    font-weight: 500;
}

kbd {
    background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #ced4da;
    border-bottom: 2px solid #adb5bd;
    border-radius: 6px;
    padding: 6px 12px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    font-weight: 600;
    color: #212529;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    white-space: nowrap;
}

.keyboard-shortcuts-footer {
    padding: 16px 24px;
    background: #f8f9fa;
    border-radius: 0 0 12px 12px;
    text-align: center;
}

.keyboard-shortcuts-footer small {
    color: #6c757d;
    font-size: 13px;
}

.keyboard-shortcuts-footer kbd {
    margin: 0 4px;
}

/* Backdrop */
.keyboard-shortcuts-help::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s;
}

.keyboard-shortcuts-help.show::before {
    opacity: 1;
}

/* Mobile responsive */
@media (max-width: 576px) {
    .keyboard-shortcuts-help {
        width: 95%;
        max-height: 90vh;
    }
    
    .keyboard-shortcuts-header {
        padding: 16px 20px;
    }
    
    .keyboard-shortcuts-header h4 {
        font-size: 18px;
    }
    
    .keyboard-shortcuts-list {
        padding: 16px;
    }
    
    .keyboard-shortcuts-list li {
        padding: 10px 12px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .shortcut-label {
        font-size: 14px;
    }
    
    kbd {
        font-size: 12px;
        padding: 4px 10px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .keyboard-shortcuts-help {
        transition: opacity 0.1s;
        transform: translate(-50%, -50%);
    }
    
    .keyboard-shortcuts-help.show {
        transform: translate(-50%, -50%);
    }
}

/* High contrast */
@media (prefers-contrast: high) {
    .keyboard-shortcuts-help {
        border: 3px solid currentColor;
    }
    
    kbd {
        border-width: 2px;
    }
}

/* ========================================
   Keyboard Shortcuts Floating Button
   ======================================== */

.keyboard-shortcuts-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.keyboard-shortcuts-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.6);
}

.keyboard-shortcuts-btn:active {
    transform: scale(0.95);
}

.keyboard-shortcuts-btn:focus {
    outline: 3px solid #0d6efd;
    outline-offset: 3px;
}

.keyboard-icon {
    font-size: 28px;
    line-height: 1;
}

/* Pulse animation to draw attention */
.keyboard-shortcuts-btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid #0d6efd;
    animation: keyboard-pulse 2s infinite;
}

@keyframes keyboard-pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}

/* Mobile positioning */
@media (max-width: 767.98px) {
    .keyboard-shortcuts-btn {
        bottom: 16px;
        right: 16px;
        width: 52px;
        height: 52px;
        font-size: 22px;
    }
}

/* Hide on very small screens to avoid covering content */
@media (max-width: 400px) {
    .keyboard-shortcuts-btn {
        width: 48px;
        height: 48px;
        bottom: 12px;
        right: 12px;
    }
}

/* Print: hide button */
@media print {
    .keyboard-shortcuts-btn {
        display: none;
    }
}