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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-light);
    padding: 2rem 1rem;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.header p {
    font-size: 1.25rem;
    opacity: 0.9;
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Cards */
.card {
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.card-content {
    color: var(--text-dark);
}

/* Grid Container */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline-item {
    position: relative;
    padding-bottom: 1.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0;
    height: 100%;
    width: 2px;
    background-color: var(--primary-color);
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: -2.25rem;
    top: 0.25rem;
    height: 0.5rem;
    width: 0.5rem;
    border-radius: 50%;
    background-color: var(--primary-color);
}

/* Botões */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

/* Responsividade */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 2rem;
    }
}

/* Utilitários */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.text-center {
    text-align: center;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

/* Acessibilidade */
:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Study Tips */
.study-tips {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 0 0.5rem 0.5rem 0;
}

.study-tips h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Card Hover Effects */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

/* Botão Voltar ao Topo */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-color);
    color: white;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease;
    border: none;
}

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

.back-to-top:hover {
    background-color: var(--primary-dark);
}

/* Mobile Menu */
.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-button {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: 1rem;
        flex-direction: column;
        box-shadow: var(--shadow);
    }

    .nav-links.active {
        display: flex;
    }

    .card {
        margin: 1rem 0;
    }

    .grid-container {
        padding: 0 1rem;
    }
}


/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Ícones */
.icon {
    width: 24px;
    height: 24px;
    stroke-width: 1.5;
    stroke: currentColor;
    fill: none;
    vertical-align: middle;
    margin-right: 0.5rem;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: var(--text-light);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

/* Listas de Recursos */
.resource-list {
    list-style: none;
    padding: 0;
}

.resource-list li {
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    transition: transform 0.2s ease;
}

.resource-list li:hover {
    transform: translateX(10px);
}

/* Lista de Tópicos das Disciplinas */
.discipline-topics {
    list-style: none;
    padding: 0;
    margin-bottom: 1rem;
}

.discipline-topics li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}


/* Estilos para Impressão A4 Otimizado */
@media print {
    /* Configurações básicas da página A4 */
    @page {
        size: A4;
        margin: 1.5cm 1cm; /* Margens reduzidas para aproveitar melhor o espaço */
    }

    /* Configurações gerais para economia de espaço */
    body {
        font-size: 10pt; /* Fonte menor para maior compactação */
        line-height: 1.3; /* Entrelinhas reduzido */
        font-family: Arial, sans-serif; /* Fonte mais compacta */
        margin: 0;
        padding: 0;
        width: 100%;
    }

    /* Remove elementos desnecessários */
    .nav, .footer, .back-to-top, .mobile-menu-button,
    .skip-link, button, .animation-container {
        display: none !important;
    }

    /* Cabeçalho compacto */
    .header {
        padding: 0.5cm 0;
        margin-bottom: 0.5cm;
        border-bottom: 0.5pt solid #000;
    }

    .header h1 {
        font-size: 16pt;
        margin: 0;
    }

    .header p {
        font-size: 10pt;
        margin: 0.2cm 0 0 0;
    }

    /* Layout em grid otimizado para A4 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr); /* 2 colunas para melhor uso do espaço */
        gap: 0.5cm;
        width: 100%;
    }

    /* Cards compactos */
    .card {
        break-inside: avoid;
        padding: 0.3cm;
        margin: 0 0 0.3cm 0;
        border: 0.5pt solid #000;
        page-break-inside: avoid;
    }

    .card-title {
        font-size: 12pt;
        margin: 0 0 0.2cm 0;
        padding: 0;
    }

    /* Listas mais compactas */
    ul, ol {
        margin: 0.2cm 0;
        padding-left: 0.5cm;
    }

    li {
        margin-bottom: 0.1cm;
    }

    /* Timeline compacto */
    .timeline-item {
        padding-left: 0.3cm;
        margin-bottom: 0.2cm;
        border-left: 0.5pt solid #000;
    }

    /* Dicas de estudo compactas */
    .study-tips {
        margin: 0.2cm 0;
        padding: 0.2cm;
        border: 0.5pt solid #000;
    }

    /* Títulos de seção */
    h2 {
        font-size: 14pt;
        margin: 0.5cm 0 0.3cm 0;
        page-break-after: avoid;
    }

    h3 {
        font-size: 12pt;
        margin: 0.3cm 0 0.2cm 0;
        page-break-after: avoid;
    }

    /* Parágrafos mais compactos */
    p {
        margin: 0.1cm 0;
    }

    /* Controle de quebra de páginas */
    section {
        page-break-before: auto; /* Permite que o conteúdo flua naturalmente */
    }

    /* Rodapé compacto com numeração */
    @page {
        @bottom-center {
            content: counter(page);
            font-size: 8pt;
        }
    }

    /* Links mais compactos */
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 8pt;
        font-style: italic;
    }

    /* Ajustes para tabelas */
    table {
        font-size: 9pt;
        margin: 0.2cm 0;
    }

    th, td {
        padding: 0.1cm;
    }

    /* Ícones e imagens */
    img, svg {
        max-height: 1cm;
        width: auto;
    }

    /* Ajustes para recursos e métodos */
    .resource-list, .method-steps {
        columns: 2;
        column-gap: 0.5cm;
    }

    .resource-list li, .method-steps li {
        break-inside: avoid;
    }

    /* Timeline mais compacto */
    .timeline {
        margin: 0.2cm 0;
    }

    /* Esconde decorações não essenciais */
    .card:before, .card:after,
    .timeline-item:before, .timeline-item:after {
        display: none;
    }

    /* Ajustes para disciplinas */
    .discipline-topics {
        column-count: 2;
        column-gap: 0.5cm;
        margin: 0.2cm 0;
    }

    .discipline-topics li {
        break-inside: avoid;
    }
}