/**
 * =====================================================
 * MELHORIAS DE ACESSIBILIDADE - Sistema de Chamados
 * =====================================================
 * 
 * Este arquivo implementa melhorias de acessibilidade seguindo
 * as diretrizes WCAG 2.1 (Web Content Accessibility Guidelines)
 * Nível AA como padrão mínimo.
 */

/* ========================================
   1. VARIÁVEIS CSS - Design System
   ======================================== */
:root {
    /* Cores Primárias - Acessíveis (contraste 4.5:1 mínimo) */
    --color-primary: #5a67d8;
    --color-primary-dark: #4c51bf;
    --color-primary-light: #7f9cf5;
    
    /* Cores Secundárias */
    --color-secondary: #6b46c1;
    --color-secondary-dark: #553c9a;
    --color-secondary-light: #9f7aea;
    
    /* Sidebar Gradient */
    --sidebar-gradient-start: #667eea;
    --sidebar-gradient-end: #764ba2;
    
    /* Cores de Estado - Alto Contraste */
    --color-success: #2f855a;
    --color-success-light: #48bb78;
    --color-warning: #d97706;
    --color-warning-light: #f59e0b;
    --color-danger: #c53030;
    --color-danger-light: #e53e3e;
    --color-info: #2c5282;
    --color-info-light: #3182ce;
    
    /* Cores Neutras */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Tipografia */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Tamanhos de Fonte - Escala Modular */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    
    /* Espaçamentos - Escala 8pt */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    
    /* Raios de Borda */
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.5rem;    /* 24px */
    --radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transições */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Modo Escuro */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #111827;
        --color-bg-secondary: #1f2937;
        --color-text-primary: #f9fafb;
        --color-text-secondary: #d1d5db;
    }
}

/* ========================================
   2. RESET E NORMALIZAÇÃO
   ======================================== */

/* Remove margem padrão de elementos */
h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd {
    margin: 0;
}

/* Remove padding de listas */
ul, ol {
    padding: 0;
}

/* Remove estilo de lista quando role="list" não está presente */
ul[class], ol[class] {
    list-style: none;
}

/* Configuração de box-sizing */
*, *::before, *::after {
    box-sizing: border-box;
}

/* ========================================
   3. MELHORIAS DE FOCO (WCAG 2.4.7)
   ======================================== */

/* Remove outline padrão e adiciona estilo personalizado */
*:focus {
    outline: none;
}

/* Indicador de foco visível e consistente */
*:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Foco para elementos interativos */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Foco para checkboxes e radios */
input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Estilo de foco para cards e containers clicáveis */
.card:focus-within,
.clickable:focus-within {
    box-shadow: 0 0 0 3px rgba(90, 103, 216, 0.3);
}

/* ========================================
   4. TIPOGRAFIA ACESSÍVEL (WCAG 1.4.8)
   ======================================== */

/* Base tipográfica */
body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Títulos com hierarquia clara */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
    letter-spacing: -0.025em;
}

h2 {
    font-size: var(--font-size-3xl);
    letter-spacing: -0.025em;
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
    font-weight: 600;
}

/* Parágrafos com espaçamento adequado */
p {
    margin-bottom: var(--spacing-md);
    max-width: 65ch; /* Largura ideal para leitura */
}

/* Links acessíveis */
a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration-thickness: 2px;
}

a:active {
    color: var(--color-primary-dark);
}

/* ========================================
   5. CONTRASTE DE CORES (WCAG 1.4.3)
   ======================================== */

/* Badges com contraste adequado */
.badge {
    font-weight: 600;
    font-size: var(--font-size-sm);
    padding: 0.25em 0.6em;
    border-radius: var(--radius-md);
    display: inline-block;
}

.badge-primary {
    background-color: var(--color-primary);
    color: white;
}

.badge-success {
    background-color: var(--color-success);
    color: white;
}

.badge-warning {
    background-color: var(--color-warning);
    color: white;
}

.badge-danger {
    background-color: var(--color-danger);
    color: white;
}

.badge-info {
    background-color: var(--color-info);
    color: white;
}

/* Status com cores acessíveis */
.status-open {
    background-color: #dbeafe;
    color: #1e40af;
    border-left: 4px solid #2563eb;
}

.status-in-progress {
    background-color: #fef3c7;
    color: #92400e;
    border-left: 4px solid #d97706;
}

.status-resolved {
    background-color: #d1fae5;
    color: #065f46;
    border-left: 4px solid #059669;
}

.status-closed {
    background-color: #f3f4f6;
    color: #374151;
    border-left: 4px solid #6b7280;
}

/* Prioridades com cores acessíveis */
.priority-urgent {
    background-color: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #dc2626;
}

.priority-high {
    background-color: #fed7aa;
    color: #9a3412;
    border-left: 4px solid #ea580c;
}

.priority-medium {
    background-color: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}

.priority-low {
    background-color: #dbeafe;
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}

/* ========================================
   6. BOTÕES ACESSÍVEIS (WCAG 2.5.5)
   ======================================== */

/* Base dos botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    min-height: 44px; /* Tamanho mínimo de toque WCAG 2.5.5 */
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Variantes de botões */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-primary);
    color: white;
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background-color: #276749;
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background-color: #9b2c2c;
    transform: translateY(-1px);
}

/* Tamanhos de botões */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-lg);
    min-height: 52px;
}

/* ========================================
   7. FORMULÁRIOS ACESSÍVEIS (WCAG 3.3.2)
   ======================================== */

/* Labels visíveis e associados */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-label-required::after {
    content: " *";
    color: var(--color-danger);
    font-weight: bold;
}

/* Inputs com contraste adequado */
.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: white;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 44px;
}

.form-control:hover {
    border-color: var(--color-gray-400);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(90, 103, 216, 0.1);
    outline: none;
}

.form-control::placeholder {
    color: var(--color-gray-400);
    opacity: 1;
}

/* Estados de erro */
.form-control.is-invalid {
    border-color: var(--color-danger);
}

.form-control.is-invalid:focus {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(197, 48, 48, 0.1);
}

.invalid-feedback {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    font-weight: 500;
}

/* Estados de sucesso */
.form-control.is-valid {
    border-color: var(--color-success);
}

.valid-feedback {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
}

/* Texto de ajuda */
.form-text {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

/* Checkboxes e Radios customizados */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-left: 0;
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.form-check-label {
    cursor: pointer;
    user-select: none;
    font-size: var(--font-size-base);
}

/* ========================================
   8. TABELAS ACESSÍVEIS (WCAG 1.3.1)
   ======================================== */

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: var(--spacing-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.table thead th {
    font-weight: 700;
    color: var(--color-gray-700);
    background-color: var(--color-gray-50);
    border-bottom: 2px solid var(--color-gray-300);
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody tr:hover {
    background-color: var(--color-gray-50);
}

.table tbody tr:focus-within {
    background-color: var(--color-gray-100);
    box-shadow: inset 3px 0 0 var(--color-primary);
}

/* ========================================
   9. ALERTAS ACESSÍVEIS (WCAG 1.4.1)
   ======================================== */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-icon {
    flex-shrink: 0;
    font-size: var(--font-size-xl);
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.alert-success {
    background-color: #d1fae5;
    border-color: var(--color-success);
    color: #065f46;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: var(--color-warning);
    color: #92400e;
}

.alert-danger {
    background-color: #fee2e2;
    border-color: var(--color-danger);
    color: #991b1b;
}

.alert-info {
    background-color: #dbeafe;
    border-color: var(--color-info);
    color: #1e40af;
}

/* Botão de fechar alert */
.alert-close {
    flex-shrink: 0;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    padding: 0;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.alert-close:hover {
    opacity: 1;
}

/* ========================================
   10. NAVEGAÇÃO ACESSÍVEL (WCAG 2.4.1)
   ======================================== */

/* Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    text-decoration: none;
    font-weight: 600;
    z-index: 9999;
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid white;
    outline-offset: -3px;
}

/* Navegação breadcrumb */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    list-style: none;
    margin: 0;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    color: var(--color-gray-400);
}

.breadcrumb-item.active {
    color: var(--color-gray-600);
    font-weight: 600;
}

/* ========================================
   11. MODAIS ACESSÍVEIS (WCAG 2.1.2)
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.show {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.modal-dialog {
    position: relative;
    z-index: 1;
    background: white;
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--color-gray-100);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ========================================
   12. TOOLTIPS ACESSÍVEIS
   ======================================== */

.tooltip {
    position: absolute;
    z-index: var(--z-tooltip);
    background-color: var(--color-gray-900);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    max-width: 250px;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tooltip.show {
    opacity: 1;
}

.tooltip-arrow {
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: var(--color-gray-900);
    transform: rotate(45deg);
}

/* ========================================
   13. UTILITÁRIOS DE ACESSIBILIDADE
   ======================================== */

/* Esconder visualmente mas manter para leitores de tela (WCAG 1.3.1) */
.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 {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* Reduzir movimento para usuários com preferência (WCAG 2.3.3) */
@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;
    }
}

/* ========================================
   14. MODO DE ALTO CONTRASTE
   ======================================== */

@media (prefers-contrast: high) {
    :root {
        --color-primary: #0000ff;
        --color-primary-dark: #0000cc;
        --color-success: #008000;
        --color-danger: #ff0000;
        --color-warning: #ff8c00;
    }
    
    .btn {
        border-width: 3px;
    }
    
    .form-control {
        border-width: 3px;
    }
}

/* ========================================
   15. IMPRESSÃO
   ======================================== */

@media print {
    /* Otimizar para impressão */
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
    
    .btn,
    .sidebar,
    .navbar,
    .modal,
    .alert-close {
        display: none !important;
    }
    
    .table {
        border-collapse: collapse;
    }
    
    .table th,
    .table td {
        border: 1px solid black;
    }
}