/* ==========================================================================
   Cognita Hub - CSS Principal
   Paleta de Cores Oficial, Layout Responsivo, Flexbox/Grid e Polimento Visual
   ========================================================================== */

:root {
    /* Paleta Oficial Cognita Hub */
    --cognita-navy: #0D1B2A;          /* Azul Noite Profundo (Cabeçalho, Footer, Títulos Principais) */
    --cognita-deep-blue: #1B263B;     /* Azul Ardósia Escuro (Acentos secundários) */
    --cognita-accent-coral: #E76F51;  /* Laranja Queimado / Coral Vibrante (CTA, Destaque) */
    --cognita-accent-coral-hover: #D65F40;
    --cognita-soft-blue: #A2D2FF;     /* Azul Glacial Claro (Ícones, Detalhes) */
    --cognita-bg-main: #F8F9FA;       /* Fundo Neutro Claro */
    --cognita-surface: #FFFFFF;       /* Fundo de Cards e Containers */
    --cognita-text-primary: #212529;  /* Texto Escuro de Alta Leitura */
    --cognita-text-secondary: #6C757D;/* Texto Secundário Neutro */
    --cognita-border-subtle: #E9ECEF; /* Bordas Leves */
    --cognita-border-focus: #A2D2FF;

    /* Fontes e Tipografia */
    --font-headings: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Formas e Bordas */
    --border-radius-large: 16px;
    --border-radius-medium: 10px;
    --border-radius-small: 6px;
    --border-radius-pill: 50px;

    /* Sombras e Transições */
    --shadow-subtle: 0 4px 12px rgba(13, 27, 42, 0.06);
    --shadow-medium: 0 6px 18px rgba(13, 27, 42, 0.10);
    --shadow-hover: 0 12px 28px rgba(13, 27, 42, 0.15);
    --transition-fast: 0.2s ease-in-out;
    --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* --- Reset e Globais --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--cognita-bg-main);
    color: var(--cognita-text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

a {
    color: var(--cognita-accent-coral);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--cognita-accent-coral-hover);
    text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    font-weight: 700;
    line-height: 1.3;
    color: var(--cognita-navy);
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 1rem;
    color: var(--cognita-navy);
    position: relative;
    padding-bottom: 0.75rem;
}

h2.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--cognita-accent-coral);
    border-radius: var(--border-radius-pill);
}

p.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--cognita-text-secondary);
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3rem;
}

/* --- Cabeçalho & Navegação --- */
.main-navigation {
    background-color: var(--cognita-navy);
    box-shadow: var(--shadow-medium);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--cognita-deep-blue);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-headings);
    font-size: 1.4rem;
    font-weight: 800;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo:hover, .logo:focus {
    color: var(--cognita-soft-blue);
}

.logo-ufpr {
    height: 42px;
    width: auto;
    border-radius: var(--border-radius-small);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.site-nav ul#nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-nav a.nav-link {
    color: #E0E6ED;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    border-radius: var(--border-radius-small);
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.site-nav a.nav-link:hover,
.site-nav a.nav-link:focus,
.site-nav a.nav-link.active {
    color: #FFFFFF;
    background-color: var(--cognita-deep-blue);
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #FFFFFF;
    font-size: 1.4rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.nav-toggle:hover, .nav-toggle:focus {
    background-color: var(--cognita-deep-blue);
}

/* --- Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, var(--cognita-navy) 0%, var(--cognita-deep-blue) 100%);
    color: #FFFFFF;
    padding: 5rem 0;
    border-bottom: 1px solid var(--cognita-deep-blue);
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
}

.hero-content .hero-title {
    color: #FFFFFF;
    margin-bottom: 1.25rem;
    font-weight: 800;
}

.hero-content .hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: #D0D9E5;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.cta-button.hero-cta {
    background-color: var(--cognita-accent-coral);
    color: #FFFFFF;
    padding: 0.9rem 2.2rem;
    border-radius: var(--border-radius-pill);
    font-weight: 700;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(231, 111, 81, 0.4);
    transition: all var(--transition-smooth);
    border: none;
}

.cta-button.hero-cta:hover, .cta-button.hero-cta:focus {
    background-color: var(--cognita-accent-coral-hover);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(231, 111, 81, 0.5);
    color: #FFFFFF;
}

.hero-graphic {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-img {
    width: 100%;
    max-width: 440px;
    height: auto;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-hover);
    border: 3px solid rgba(162, 210, 255, 0.2);
    transition: transform var(--transition-smooth);
}

.hero-img:hover {
    transform: scale(1.02);
}

/* --- Seções de Conteúdo --- */
.content-section {
    padding: 5rem 0;
}

.content-section:nth-child(even) {
    background-color: var(--cognita-surface);
    border-top: 1px solid var(--cognita-border-subtle);
    border-bottom: 1px solid var(--cognita-border-subtle);
}

.site-main {
    flex-grow: 1;
}

/* --- 1. Seção de Recursos (Fontes de Conhecimento Cognita) --- */
.recursos-section .categorias-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    align-items: stretch;
}

.categoria {
    background-color: var(--cognita-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius-medium);
    box-shadow: var(--shadow-subtle);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all var(--transition-smooth);
    border: 1px solid var(--cognita-border-subtle);
}

.categoria:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--cognita-soft-blue);
}

.categoria h3 {
    font-size: 1.25rem;
    color: var(--cognita-navy);
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--cognita-border-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Ícones dinâmicos via CSS pseudo-elementos */
.categoria[data-categoria="Livros"] h3::before {
    content: "\f02d";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--cognita-accent-coral);
}

.categoria[data-categoria="Podcasts"] h3::before {
    content: "\f130";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--cognita-accent-coral);
}

.categoria[data-categoria="Canais do YouTube"] h3::before {
    content: "\f16a";
    font-family: "Font Awesome 6 Brands";
    font-weight: 400;
    color: var(--cognita-accent-coral);
}

.categoria[data-categoria="Sites de Notícias"] h3::before {
    content: "\f1ea";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--cognita-accent-coral);
}

.lista-recursos {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.lista-recursos ul {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.recurso-item {
    transition: all var(--transition-fast);
}

.recurso-card {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--cognita-border-subtle);
    border-radius: var(--border-radius-small);
    background-color: var(--cognita-bg-main);
    transition: all var(--transition-fast);
    align-items: center;
}

.recurso-item.item-featured .recurso-card {
    flex-direction: column;
    align-items: stretch;
}

.recurso-capa {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-small);
    overflow: hidden;
    flex-shrink: 0;
    background-color: var(--cognita-navy);
}

.recurso-item.item-featured .recurso-capa {
    width: 100%;
    height: 140px;
    margin-bottom: 0.5rem;
}

.recurso-capa img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recurso-info {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.recurso-info h4 {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--cognita-navy);
    margin-bottom: 0.15rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recurso-info h4 a {
    color: inherit;
}

.recurso-info h4 a:hover {
    color: var(--cognita-accent-coral);
}

.recurso-autor {
    font-size: 0.78rem;
    color: var(--cognita-text-secondary);
    margin-bottom: 0.2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recurso-descricao {
    font-size: 0.8rem;
    color: var(--cognita-text-secondary);
    line-height: 1.4;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease, margin-top 0.3s ease;
}

.recurso-item.item-featured .recurso-descricao {
    max-height: 80px;
    opacity: 1;
    margin-top: 0.25rem;
}

.recurso-item:not(.item-featured):hover .recurso-card {
    background-color: #FFFFFF;
    border-color: var(--cognita-accent-coral);
}

.recurso-item:not(.item-featured):hover .recurso-descricao {
    max-height: 70px;
    opacity: 1;
    margin-top: 0.25rem;
}

.recurso-item-empty {
    color: var(--cognita-text-secondary);
    font-style: italic;
    padding: 1rem 0;
    font-size: 0.9rem;
}

.btn-show-more {
    background-color: transparent;
    color: var(--cognita-navy);
    border: 1px solid var(--cognita-navy);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    margin-top: 1rem;
    align-self: flex-start;
    transition: all var(--transition-fast);
}

.btn-show-more:hover {
    background-color: var(--cognita-navy);
    color: #FFFFFF;
}

.item-hidden {
    display: none !important;
}

/* --- 2. Seção de Questionários (Desafios Cognita) --- */
.quiz-section .quiz-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.quiz-card {
    background-color: var(--cognita-surface);
    border-radius: var(--border-radius-medium);
    box-shadow: var(--shadow-subtle);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all var(--transition-smooth);
    border: 1px solid var(--cognita-border-subtle);
    cursor: pointer;
}

.quiz-card:hover, .quiz-card:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--cognita-accent-coral);
}

.quiz-card .card-media {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background-color: var(--cognita-navy);
}

.quiz-card .card-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease-out;
}

.quiz-card:hover .card-icon {
    transform: scale(1.06);
}

.quiz-card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.quiz-card-content h3 {
    font-size: 1.3rem;
    color: var(--cognita-navy);
    margin-bottom: 0.6rem;
}

.quiz-card-content p {
    font-size: 0.95rem;
    color: var(--cognita-text-secondary);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 1.25rem;
}

.cta-button-quiz {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--cognita-bg-main);
    color: var(--cognita-accent-coral);
    border: 1.5px solid var(--cognita-accent-coral);
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-pill);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    align-self: flex-start;
    transition: all var(--transition-fast);
}

.quiz-card:hover .cta-button-quiz {
    background-color: var(--cognita-accent-coral);
    color: #FFFFFF;
}

/* --- 3. Seção de Benefícios --- */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.benefit-item {
    background-color: var(--cognita-surface);
    padding: 2.2rem 1.5rem;
    border-radius: var(--border-radius-medium);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--cognita-border-subtle);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    transition: all var(--transition-smooth);
}

.benefit-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--cognita-soft-blue);
}

.benefit-icon-wrapper {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: rgba(231, 111, 81, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    transition: transform var(--transition-smooth);
}

.benefit-item:hover .benefit-icon-wrapper {
    transform: scale(1.1) rotate(-5deg);
    background-color: var(--cognita-accent-coral);
}

.benefit-icon {
    font-size: 2rem;
    color: var(--cognita-accent-coral);
    transition: color var(--transition-fast);
}

.benefit-item:hover .benefit-icon {
    color: #FFFFFF;
}

.benefit-item h3 {
    font-size: 1.25rem;
    color: var(--cognita-navy);
    margin-bottom: 0.75rem;
}

.benefit-item p {
    color: var(--cognita-text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* --- 4. Seção Sobre o Criador --- */
.about-section .about-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 3rem;
    align-items: center;
    background-color: var(--cognita-surface);
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--cognita-border-subtle);
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.about-section .creator-media {
    display: flex;
    justify-content: center;
}

.about-section .creator-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--cognita-soft-blue);
    box-shadow: var(--shadow-medium);
}

.about-section .creator-content p {
    font-size: 1.05rem;
    color: var(--cognita-text-secondary);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-section .creator-content p:last-child {
    margin-bottom: 0;
}

.about-section .creator-content strong {
    color: var(--cognita-navy);
    font-weight: 600;
}

/* --- 5. Rodapé --- */
.site-footer {
    background-color: var(--cognita-navy);
    color: #D0D9E5;
    padding: 4rem 0 2rem 0;
    border-top: 1px solid var(--cognita-deep-blue);
    margin-top: auto;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-column h4 {
    font-size: 1.15rem;
    color: #FFFFFF;
    margin-bottom: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 35px;
    height: 3px;
    background: var(--cognita-accent-coral);
    border-radius: var(--border-radius-pill);
}

.footer-column p,
.footer-column a {
    color: #BCCCDC;
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-column a:hover,
.footer-column a:focus {
    color: var(--cognita-accent-coral);
}

.footer-column .social-links {
    display: flex;
    gap: 1.2rem;
    margin-top: 0.5rem;
}

.footer-column .social-links a {
    font-size: 1.6rem;
    color: #BCCCDC;
    transition: all var(--transition-fast);
}

.footer-column .social-links a:hover,
.footer-column .social-links a:focus {
    color: var(--cognita-accent-coral);
    transform: translateY(-2px) scale(1.1);
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.footer-contact p i {
    color: var(--cognita-soft-blue);
    width: 20px;
    text-align: center;
}

.copyright-text {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: #8A9BAE;
}

/* ==========================================================================
   RESPONSIVIDADE E MEDIA QUERIES (R3)
   ========================================================================== */

/* --- Tablet Adaptation (max-width: 1024px) --- */
@media (max-width: 1024px) {
    .recursos-section .categorias-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .quiz-section .quiz-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }

    .hero-container {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 2rem;
    }

    .about-section .about-grid {
        grid-template-columns: 200px 1fr;
        gap: 2rem;
        padding: 2rem;
    }
}

/* --- Mobile Adaptation (max-width: 768px) --- */
@media (max-width: 768px) {
    .nav-container {
        position: relative;
    }

    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .site-nav ul#nav-menu {
        position: absolute;
        top: calc(100% + 1rem);
        right: 1.5rem;
        left: 1.5rem;
        background-color: var(--cognita-navy);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem 0;
        border-radius: var(--border-radius-medium);
        box-shadow: var(--shadow-hover);
        border: 1px solid var(--cognita-deep-blue);
        display: none;
        opacity: 0;
        transform: translateY(-10px);
        transition: opacity var(--transition-fast), transform var(--transition-fast);
    }

    .site-nav ul#nav-menu.is-active {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }

    .site-nav a.nav-link {
        display: block;
        padding: 0.85rem 1.5rem;
        border-radius: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .site-nav li:last-child a.nav-link {
        border-bottom: none;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }

    .hero-graphic {
        order: -1;
    }

    .hero-img {
        max-width: 320px;
    }

    .recursos-section .categorias-grid {
        grid-template-columns: 1fr;
    }

    .quiz-section .quiz-grid {
        grid-template-columns: 1fr;
    }

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

    .about-section .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 1.5rem;
    }

    .about-section .creator-img {
        width: 150px;
        height: 150px;
        margin-bottom: 1rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-column h4::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-contact p {
        justify-content: center;
    }

    .footer-column .social-links {
        justify-content: center;
    }

    .cta-button.hero-cta {
        width: 100%;
        justify-content: center;
    }
}

/* --- Extra Small Mobile Screens (max-width: 480px) --- */
@media (max-width: 480px) {
    html {
        font-size: 15px;
    }

    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .hero-section {
        padding: 3.5rem 0;
    }

    .content-section {
        padding: 3.5rem 0;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo-ufpr {
        height: 36px;
    }

    .quiz-card .card-media {
        height: 170px;
    }
}

/* --- Clientes utilitários --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.hidden {
    display: none !important;
}