/* ========================================
   ODS 1 - Erradicação da Pobreza
   CSS Otimizado com Melhorias de Acessibilidade
   ======================================== */

/* Variáveis CSS para facilitar manutenção */
:root {
    /* Cores principais */
    --primary: #e5243b;
    --secondary: #c5192d;
    --accent: #891523;
    --light: #fef5f6;
    --dark: #6d0f19;
    --text: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    
    /* Transições */
    --transition-fast: 0.2s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Tipografia */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --line-height: 1.6;
    
    /* Espaçamentos */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Bordas */
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
}

/* Tema escuro */
[data-theme="dark"] {
    --primary: #ff6b8a;
    --secondary: #e55573;
    --text: #e9ecef;
    --text-light: #adb5bd;
    --white: #212529;
    --gray-100: #343a40;
    --gray-200: #495057;
    --gray-300: #6c757d;
    --light: #2d1b1f;
    --dark: #f8d7da;
}

/* Reset e base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--gray-100);
    color: var(--text);
    line-height: var(--line-height);
    font-size: var(--font-size-base);
}

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

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

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header melhorado */
header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,128L48,138.7C96,149,192,171,288,165.3C384,160,480,128,576,128C672,128,768,160,864,170.7C960,181,1056,171,1152,160C1248,149,1344,139,1392,133.3L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: center;
    opacity: 0.3;
}

.header-content {
    position: relative;
    z-index: 1;
}

.school-name {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.ods-badge {
    display: inline-block;
    background: var(--white);
    color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 25px;
    font-weight: 600;
    margin: var(--spacing-sm) 0;
}

.tagline {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

/* Navegação melhorada */
nav {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.nav-brand {
    font-weight: bold;
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--primary);
    background-color: var(--gray-100);
    outline: 2px solid transparent;
}

/* Controles do tema */
.theme-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    background: none;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: var(--primary);
    color: var(--white);
    outline: 2px solid transparent;
}

/* Menu mobile melhorado */
.mobile-menu {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary);
    padding: var(--spacing-xs);
}

.mobile-menu:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-sm) 0;
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.breadcrumb-item:not(:last-child)::after {
    content: "→";
    margin-left: var(--spacing-xs);
    color: var(--text-light);
}

.breadcrumb-link {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-link:hover {
    text-decoration: underline;
}

/* Barra de progresso de leitura */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--primary);
    z-index: 1000;
    transition: width 0.1s ease;
}

/* Main content */
main {
    padding: var(--spacing-lg) 0;
}

section {
    margin-bottom: var(--spacing-xl);
}

/* Tipografia melhorada */
h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    border-left: 5px solid var(--secondary);
    padding-left: var(--spacing-sm);
    scroll-margin-top: 100px;
}

h3 {
    font-size: var(--font-size-xl);
    color: var(--secondary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    scroll-margin-top: 100px;
}

h4 {
    font-size: var(--font-size-lg);
    color: var(--primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
    text-align: justify;
}

/* Cards melhorados */
.card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.highlight-box {
    background: linear-gradient(135deg, var(--light), #fff0f2);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius);
}

.concept-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    transition: all var(--transition);
}

.concept-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    border-color: var(--primary);
}

.stats-box {
    background: linear-gradient(135deg, #fff0f2, var(--light));
    border: 2px solid var(--primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.stats-box h4 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

/* Listas melhoradas */
ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Links melhorados */
.resource-link {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    text-decoration: none;
    margin: var(--spacing-xs);
    transition: all var(--transition);
    font-weight: 500;
}

.resource-link:hover,
.resource-link:focus {
    background: var(--secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    outline: 2px solid transparent;
}

.external-link {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px dashed var(--primary);
    transition: all var(--transition);
}

.external-link:hover,
.external-link:focus {
    border-bottom-style: solid;
    background-color: var(--light);
    padding: 2px 4px;
    border-radius: var(--border-radius-sm);
}

/* Grids melhorados */
.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.goal-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    transition: all var(--transition);
}

.goal-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.goal-item h4 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.resource-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all var(--transition);
}

.resource-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.resource-item i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

/* Busca interna */
.search-container {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
    position: sticky;
    top: 80px;
    z-index: 50;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: border-color var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(229, 36, 59, 0.1);
}

.search-results {
    margin-top: var(--spacing-sm);
    display: none;
}

.search-result-item {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
    cursor: pointer;
}

.search-result-item:hover {
    background: var(--gray-100);
}

/* Tooltips */
.tooltip {
    position: relative;
    cursor: help;
    border-bottom: 1px dotted var(--primary);
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
    z-index: 1000;
}

.tooltip:hover::after,
.tooltip:focus::after {
    opacity: 1;
}

/* Botão voltar ao topo */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 100;
    box-shadow: var(--shadow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover,
.back-to-top:focus {
    background: var(--secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Glossário */
.glossary {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.glossary-term {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.glossary-definition {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 2px solid var(--gray-200);
}

/* Footer melhorado */
footer {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: opacity var(--transition);
}

.footer-links a:hover {
    opacity: 0.8;
}

/* Responsividade */
@media (max-width: 1024px) {
    .container {
        width: 95%;
    }
    
    .goals-grid,
    .resources-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    /* Navegação mobile */
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: left var(--transition);
        box-shadow: var(--shadow);
        padding: var(--spacing-lg) 0;
        gap: var(--spacing-sm);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .mobile-menu {
        display: block;
    }
    
    /* Tipografia mobile */
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .school-name {
        font-size: 1.1rem;
    }
    
    /* Layout mobile */
    .card {
        padding: var(--spacing-lg);
    }
    
    .goals-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .theme-controls {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .back-to-top {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .breadcrumbs {
        padding: var(--spacing-xs) 0;
    }
    
    .search-container {
        top: 70px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    header {
        padding: var(--spacing-lg) 0;
    }
    
    .card {
        padding: var(--spacing-sm);
    }
    
    .concept-card,
    .stats-box {
        padding: var(--spacing-lg);
    }
}

/* Modo de impressão */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    .nav-container,
    .search-container,
    .back-to-top,
    .theme-controls {
        display: none !important;
    }
    
    .card {
        break-inside: avoid;
        margin-bottom: var(--spacing-lg);
    }
    
    .resource-link {
        background: transparent !important;
        color: black !important;
        border: 1px solid black !important;
    }
}

/* Animações de carregamento */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Melhorias de acessibilidade */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Alto contraste */
@media (prefers-contrast: high) {
    :root {
        --primary: #cc0000;
        --secondary: #990000;
        --text: #000000;
        --white: #ffffff;
    }
}

/* Seleção de texto personalizada */
::selection {
    background: var(--primary);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary);
    color: var(--white);
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}