/* Definição de Variáveis - PALETA DARK MODE (#050505) */
:root {
    /* O Fundo ultra-escuro solicitado */
    --bg-background: #191919;

    /* Textos: Usando brancos e cinzas claros para alto contraste */
    --text-primary: #f8fafc;
    /* Slate 50 */
    --text-secondary: #a1a1aa;
    /* Zinc 400 (Mais suave que o Slate 500 anterior) */

    /* Bordas e Divisores: Devem ser sutis, cinzas escuros */
    --border-color: #27272a;
    /* Zinc 800 */

    /* Estados de Interação: Tons ligeiramente diferentes do fundo principal */
    --hover-bg: #111111;
    /* Cinza extremamente escuro */
    --accent-color: #f8fafc;
    /* Accent agora é branco para links ativos */

    /* Typography stays the same */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* --- LIGHT THEME OVERRIDES --- */
[data-theme="light"] {
    --bg-background: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --hover-bg: #f8fafc;
    --accent-color: #0f172a;
}

[data-theme="light"] .site-header {
    background-color: rgba(255, 255, 255, 0.8);
}

[data-theme="light"] .content-area {
    background-color: #f8fafc;
}

[data-theme="light"] .search-trigger {
    background-color: #ffffff;
}

[data-theme="light"] .search-trigger:hover {
    background-color: #f1f5f9;
    border-color: #cbd5e1;
    color: var(--text-primary);
}

[data-theme="light"] .search-trigger svg {
    color: #64748b;
}

[data-theme="light"] .search-trigger:hover svg {
    color: #0f172a;
}

[data-theme="light"] .search-shortcut {
    background-color: #f1f5f9;
    border-color: #e2e8f0;
    color: #64748b;
}

[data-theme="light"] .code-block {
    background-color: #f1f5f9;
    border-color: #e2e8f0;
}

[data-theme="light"] .code-header {
    background-color: #e2e8f0;
    color: #475569;
}

[data-theme="light"] .code-header button {
    color: #475569;
}

[data-theme="light"] .code-header button:hover {
    color: #0f172a;
}

[data-theme="light"] .code-block code {
    color: #0f172a;
}

[data-theme="light"] .feature-card {
    background-color: #ffffff;
}

[data-theme="light"] .definition-box {
    background-color: #ffffff;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .search-modal {
    background-color: #ffffff;
    border-color: #e2e8f0;
}

[data-theme="light"] .search-header {
    border-bottom-color: #e2e8f0;
}

[data-theme="light"] .search-header input::placeholder {
    color: #94a3b8;
}

[data-theme="light"] .search-category {
    color: #64748b;
}

[data-theme="light"] .search-item:hover,
[data-theme="light"] .search-item.selected {
    background-color: #f1f5f9;
}

[data-theme="light"] .search-item svg {
    color: #64748b;
}

[data-theme="light"] .search-footer {
    background-color: #f8fafc;
    border-top-color: #e2e8f0;
}

[data-theme="light"] .cmd-key {
    background-color: #e2e8f0;
    border-bottom-color: #cbd5e1;
    color: #475569;
}

[data-theme="light"] .cmd-label {
    color: #64748b;
}

[data-theme="light"] .toc-container li a:hover {
    border-left-color: #cbd5e1;
}

/* Reset Básico */
html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header Fixo e Translúcido (Escuro) */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    background-color: #161616;
    backdrop-filter: blur(8px);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
    padding: 0 2rem;
    max-width: 100%;
    margin: 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem;
    border-radius: 0.375rem;
    transition: color 0.2s, background-color 0.2s;
}

.sidebar-toggle:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
}

.breadcrumbs-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    height: 1.5rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
}

.breadcrumb-link {
    color: var(--text-secondary);
    transition: color 0.2s;
    font-weight: 500;
}

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

.breadcrumb-link.active {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumbs-header .separator {
    color: var(--text-secondary);
    width: 14px;
    height: 14px;
}

.logo {
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.top-nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.top-nav a:hover {
    color: var(--text-primary);
}

/* Layout Geral: 3 Colunas */
.main-layout {
    display: flex;
    max-width: 100%;
    margin: 0;
    padding: 0;
    min-height: calc(100vh - 3.5rem);
}

/* Sidebar Esquerda (Navegação Principal) */
.left-sidebar {
    width: 280px;
    flex-shrink: 0;
    padding: 2rem 1.5rem;
    border-right: 1px solid var(--border-color);
    position: sticky;
    top: 3.5rem;
    height: calc(100vh - 3.5rem);
    overflow-y: auto;
    overflow-x: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.left-sidebar.collapsed {
    margin-left: -280px;
    opacity: 0;
    visibility: hidden;
}

.sidebar-content {
    min-width: 234px;
}

/* Search Button in Sidebar */
.search-trigger {
    display: flex;
    align-items: center;
    width: 100%;
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.625rem 0.875rem;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    margin-bottom: 2.25rem;
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.search-trigger:hover {
    background-color: #242424;
    border-color: #3f3f46;
    color: var(--text-primary);
}

.search-trigger svg {
    color: #71717a;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.search-trigger:hover svg {
    color: #e4e4e7;
}

.search-trigger span {
    margin-left: 0.75rem;
    text-align: left;
    font-weight: 400;
}

.search-shortcut {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: #71717a;
    background-color: #0f0f11;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    border: 1px solid #27272a;
}

.search-shortcut svg {
    width: 12px;
    height: 12px;
}

.sidebar-group {
    margin-bottom: 2rem;
}

.sidebar-group h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.sidebar-group h3:first-child {
    margin-top: 0;
}

.sidebar-group ul {
    list-style: none;
}

.sidebar-group li a {
    display: block;
    padding: 0.375rem 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.sidebar-group li a:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.sidebar-group li a.active {
    background-color: var(--hover-bg);
    color: var(--accent-color);
    font-weight: 500;
}

/* Área de Conteúdo Central */
.content-area {
    flex-grow: 1;
    padding: 2.5rem 3rem;
    min-width: 0;
    background-color: #202020;
}

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

.prose h1 {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.prose .lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.prose h2,
.prose h3 {
    scroll-margin-top: 90px;
}

.prose h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.prose p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

.prose ul,
.prose ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.prose li {
    margin-bottom: 0.5rem;
}

/* Estilo de Blocos de Código */
.code-block {
    background-color: #0f172a;
    border-radius: 0.5rem;
    overflow: hidden;
    margin: 1.5rem 0;
    border: 1px solid var(--border-color);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: #1e293b;
    color: #94a3b8;
    font-size: 0.75rem;
    font-family: monospace;
}

.code-header button {
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
}

.code-header button:hover {
    color: #f8fafc;
}

.code-block pre {
    padding: 1rem;
    overflow-x: auto;
}

.code-block code {
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.875rem;
    color: #f8fafc;
}

/* Grid de Destaques */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.feature-card {
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 0.5rem;
    background-color: #0d0d0f;
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Caixa de Definição */
.definition-box {
    background-color: #121214;
    border-left: 4px solid var(--text-primary);
    border-radius: 0 0.5rem 0.5rem 0;
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.definition-box ul {
    margin-bottom: 0 !important;
}

.definition-box li {
    margin-bottom: 0 !important;
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Sidebar Direita (Table of Contents) */
.right-sidebar {
    width: 280px;
    flex-shrink: 0;
    padding: 2rem 1.5rem;
    border-left: 1px solid var(--border-color);
    position: sticky;
    top: 3.5rem;
    height: calc(100vh - 3.5rem);
    overflow-y: auto;

    /* Hide scrollbar for IE, Edge and Firefox */
    -ms-overflow-style: none;
    /* IE and Edge */
    scrollbar-width: none;
    /* Firefox */
}

/* Hide scrollbar for Chrome, Safari and Opera */
.right-sidebar::-webkit-scrollbar {
    display: none;
}

.toc-container h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.toc-container ul {
    list-style: none;
    border-left: 1px solid var(--border-color);
}

.toc-container li a {
    display: block;
    padding: 0.375rem 0 0.375rem 1rem;
    /* Hitbox vertical aumentada para evitar cliques/deslizes falsos */
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s, background-color 0.2s;
    /* Adicionar background-color transition pro hover opcional */
    border-left: 1px solid transparent;
    margin-left: -1px;
}

.toc-container li a:hover {
    color: var(--text-primary);
    border-left-color: #52525b;
}

.toc-container li a.active {
    color: var(--text-primary);
    border-left-color: var(--text-primary);
    font-weight: 500;
}

/* Nested TOC: subtopics (h3 e h4) com animação de expansão */
.toc-container ul ul {
    border-left: none;
    padding-left: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    /* Adicionando um pequeno delay de fechamento (0.15s) para permitir que o usuário deslize o mouse sem cancelar a abertura instantaneamente */
    transition: all 0.3s ease-in-out 0.15s;
}

/* Expande os subtópicos ao passar o mouse ou se houver uma seção ativa (scroll) dentro dele */
.toc-container li:hover>ul,
.toc-container li:has(a.active)>ul {
    max-height: 2000px;
    /* Espaço suficiente para os subtópicos renderizarem */
    opacity: 1;
    visibility: visible;
    margin-top: 0.25rem;
    margin-bottom: 0.25rem;
    /* Remove o delay quando vai ABRIR, apenas deixa no fechamento */
    transition-delay: 0s;
}

.toc-container ul ul li a {
    padding-left: 1.75rem;
    font-size: 0.8125rem;
}

/* Nested TOC: sub-subtopics (h4) */
.toc-container ul ul ul li a {
    padding-left: 2.5rem;
    font-size: 0.75rem;
}

/* Search Modal Styles */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 10vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-modal {
    width: 100%;
    max-width: 600px;
    background-color: #121212;
    border: 1px solid #27272a;
    border-radius: 0.75rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    max-height: 80vh;
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-overlay.active .search-modal {
    transform: scale(1);
}

.search-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #27272a;
    color: var(--text-primary);
}

.search-header svg {
    color: var(--text-secondary);
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.search-header input {
    flex-grow: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-family: inherit;
    outline: none;
}

.search-header input::placeholder {
    color: #52525b;
}

.search-results {
    overflow-y: auto;
    padding: 0.5rem;
}

.search-category {
    padding: 0.5rem 0.75rem 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #71717a;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    border-radius: 0.5rem;
    cursor: pointer;
    margin-bottom: 0.125rem;
}

.search-item svg {
    width: 16px;
    height: 16px;
    margin-right: 0.75rem;
    color: #71717a;
}

.search-item:hover,
.search-item.selected {
    background-color: #1f1f22;
    color: var(--text-primary);
}

.search-item.selected svg {
    color: var(--text-primary);
}

.search-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid #27272a;
    background-color: #0a0a0a;
    font-size: 0.75rem;
}

.search-commands {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cmd-key {
    background-color: #27272a;
    color: var(--text-secondary);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: monospace;
    font-size: 0.7rem;
    border-bottom: 1px solid #18181b;
}

.cmd-label {
    color: #52525b;
    margin-right: 0.5rem;
}

/* CSS Responsivo */
@media (max-width: 1024px) {
    .right-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .sidebar-toggle {
        display: flex;
    }

    .left-sidebar {
        position: fixed;
        top: 3.5rem;
        left: -100%;
        height: calc(100vh - 3.5rem);
        background-color: var(--bg-background);
        border-right: 1px solid var(--border-color);
        z-index: 40;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        width: 80%;
        max-width: 320px;
        box-shadow: 4px 0 15px rgba(0, 0, 0, 0.5);
    }

    .left-sidebar.active {
        left: 0;
        margin-left: 0;
        opacity: 1;
        visibility: visible;
    }

    .breadcrumbs-header {
        display: none;
    }

    .top-nav {
        gap: 1rem;
        font-size: 0.8rem;
    }

    .content-area {
        padding: 1.5rem 1.25rem;
    }

    .prose h1 {
        font-size: 1.75rem;
    }

    .prose h2 {
        font-size: 1.25rem;
    }

    .prose .lead {
        font-size: 1rem;
    }

    .search-modal {
        max-height: 100vh;
        border-radius: 0;
        margin: 0;
    }
}

/* Image Card */
.image-card {
    border-radius: 12px;
    background: transparent;
    padding: 0;
    border: none;
    box-shadow: none;
    overflow: hidden;
}

.image-card img {
    border-radius: 0;
    display: block;
    width: 100%;
    height: auto;
}

/* ==========================================
   MathJax Responsive Overflow Fix
   ========================================== */

mjx-container {
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
    padding: 0.25rem 0;
}

mjx-container[jax="CHTML"][display="true"] {
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}

.prose p,
.prose li,
.definition-box {
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.definition-box {
    overflow-x: auto;
}

@media (max-width: 768px) {
    mjx-container {
        font-size: 90% !important;
    }

    mjx-container[jax="CHTML"][display="true"] {
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 0.5rem 0;
    }

    .prose {
        overflow-x: hidden;
    }

    .prose p,
    .prose>*,
    .definition-box {
        max-width: 100%;
        overflow-x: auto;
    }
}

/* ==========================================
   Footnotes
   ========================================== */
.footnotes-sep {
    margin-top: 3rem;
    margin-bottom: 2rem;
    border: 0;
    border-top: 1px solid var(--border-color);
}

.footnotes {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footnotes ol {
    padding-left: 1.5rem;
}

.footnotes li {
    margin-bottom: 0.5rem;
}

.footnotes li p {
    margin-bottom: 0;
    font-size: inherit;
    color: inherit;
}

/* Reset superscript to avoid line-height issues */
sup {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
    top: -0.5em;
}

.footnote-ref {
    text-decoration: none;
    color: var(--text-primary);
    padding: 0 0.1rem;
}

.footnote-ref:hover {
    text-decoration: underline;
    color: var(--accent-color);
}

.footnote-backref {
    text-decoration: none;
    color: var(--text-secondary);
    margin-left: 0.25rem;
    font-family: inherit;
}

.footnote-backref:hover {
    color: var(--text-primary);
}

/* ==========================================
   Table of Contents List (TOC)
   ========================================== */
.toc-chapter-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.toc-list {
    display: flex;
    flex-direction: column;
    margin-bottom: 2rem;
}

.toc-item {
    display: flex;
    padding: 1.5rem 0;
    /* 24px */
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toc-item:first-child {
    border-top: 1px solid var(--border-color);
}

.toc-item:hover {
    opacity: 0.7;
    /* Efeito sutil ao passar o mouse */
}

.toc-item-content {
    flex: 1;
}

.toc-item-content h4 {
    font-size: 1.375rem;
    /* 22px */
    font-weight: 500;
    margin-bottom: 0.75rem;
    /* 12px */
    line-height: 1.3;
    color: var(--text-primary);
}

.toc-item-content p {
    font-size: 1rem;
    /* 16px */
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ==========================================
   Side-by-Side Content Layout
   ========================================== */
.side-by-side-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3.5rem;
    margin-top: 2rem;
}

@media (min-width: 768px) {
    .side-by-side-layout {
        flex-direction: row;
        align-items: center;
        gap: 3.5rem;
    }

    .side-by-side-text {
        flex: 1.4;
    }

    .side-by-side-image {
        flex: 0.7;
    }
}

@media (min-width: 1024px) {

    /* Quebra de Simetria: Vaza propositalmente para a região direita da tela */
    .side-by-side-layout {
        margin-right: -80px;
        gap: 4rem;
    }
}

@media (min-width: 1300px) {
    .side-by-side-layout {
        margin-right: -160px;
        gap: 5rem;
    }

    .side-by-side-text {
        flex: 1.2;
    }
}

.side-by-side-image img {
    border-radius: 12px;
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}