/* 
  CodeSteer Atlas — Estilos Visuais
  Documentação técnica dark-first, legível e acessível.
  Comentários em português, seletores em inglês.
*/

:root {
  /* Cores principais */
  --bg-primary: #080d1a;
  --bg-secondary: #0f172a;
  --bg-card: #152033;
  --bg-hover: #1e2d4a;
  
  --text-primary: #f8fafc;
  --text-secondary: #b6c2d3;
  --text-muted: #7b8aa0;

  /* Cores de destaque (Acentos) */
  --color-indigo: #6366f1;
  --color-indigo-glow: rgba(99, 102, 241, 0.15);
  --color-cyan: #0ea5e9;
  --color-cyan-glow: rgba(14, 165, 233, 0.15);
  --color-emerald: #10b981;
  --color-emerald-glow: rgba(16, 185, 129, 0.15);
  --color-amber: #f59e0b;
  --color-amber-glow: rgba(245, 158, 11, 0.1);

  /* Bordas e sombras */
  --border-color: #1e293b;
  --border-glow: rgba(99, 102, 241, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.45);

  /* Fontes */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Transições padrão */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset básico e configurações de página */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

.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;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--color-indigo);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Container responsivo */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* -----------------------------------------
   Hero Section
-------------------------------------------- */
.hero {
  position: relative;
  padding: 120px 0 90px;
  text-align: center;
  overflow: hidden;
  background: radial-gradient(circle at top, #0f162e 0%, var(--bg-primary) 70%);
}

.hero-glow {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(circle, var(--color-indigo-glow) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 1;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-cyan);
  background: var(--color-cyan-glow);
  border: 1px solid rgba(14, 165, 233, 0.35);
  border-radius: 50px;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 18px;
  position: relative;
  z-index: 2;
}

.hero .subtitle {
  font-size: 1.35rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 36px;
  position: relative;
  z-index: 2;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  position: relative;
  z-index: 2;
}

/* Botões premium */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-primary {
  color: #fff;
  background: var(--color-indigo);
  border: 1px solid rgba(99, 102, 241, 0.6);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  background: #5558e8;
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--bg-hover);
  border-color: var(--text-secondary);
}

/* -----------------------------------------
   Navbar
-------------------------------------------- */
.navbar {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 1px;
}

.nav-panel-label {
  display: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 14px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  min-height: 44px;
}

.nav-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-indigo);
  font-variant-numeric: tabular-nums;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.12);
}

.nav-links a.is-active .nav-num {
  color: var(--color-cyan);
}

/* -----------------------------------------
   Layout e Estrutura do Conteúdo
-------------------------------------------- */
.content-grid {
  padding: 60px 24px;
  display: flex;
  flex-direction: column;
  gap: 60px;
}

/* Seções estilo Card Elevado */
.card-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.card-section:hover {
  border-color: rgba(99, 102, 241, 0.25);
}

.card-section--flat {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  padding-inline: 0;
}

.card-section--flat:hover {
  border-color: transparent;
  box-shadow: none;
}

.section-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: -8px 0 24px;
}

.section-toc a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-primary);
}

.section-toc a:hover,
.section-toc a:focus-visible {
  color: var(--text-primary);
  border-color: rgba(99, 102, 241, 0.4);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.section-num {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-indigo);
  background: var(--color-indigo-glow);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

.section-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
  font-size: 15px;
}

.section-body p strong {
  color: #fff;
}

.section-body h3 {
  font-size: 1.25rem;
  color: #fff;
  margin: 32px 0 16px;
  font-weight: 600;
}

/* -----------------------------------------
   Diagramas Dinâmicos e SVGs
-------------------------------------------- */
.diagram-container {
  margin: 30px 0;
  padding: 24px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
}

.diagram-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.diagram-svg {
  width: 100%;
  max-width: 800px;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* -----------------------------------------
   Notes e Alertas
-------------------------------------------- */
.note-box {
  margin: 24px 0;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
}

.note-box.info {
  background-color: var(--color-cyan-glow);
  border: 1px solid rgba(14, 165, 233, 0.35);
  color: #e0f2fe;
}

.note-box.warning {
  background-color: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fef3c7;
}

/* -----------------------------------------
   Fluxograma de Passos (Steps)
-------------------------------------------- */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 30px 0;
}

.flow-step {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  position: relative;
  transition: transform var(--transition-fast);
}

.flow-step:hover {
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.2);
}

.step-badge {
  position: absolute;
  top: -12px;
  left: 20px;
  width: 28px;
  height: 28px;
  background-color: var(--color-indigo);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

.flow-step h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 8px;
  margin-top: 4px;
  font-weight: 600;
}

.flow-step p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* -----------------------------------------
   Listas de Conceitos
-------------------------------------------- */
.concept-list {
  list-style: none;
  margin: 20px 0;
}

.concept-list li {
  margin-bottom: 14px;
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--text-secondary);
}

.concept-list li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--color-cyan);
  font-size: 12px;
}

.concept-list li strong {
  color: #fff;
}

/* -----------------------------------------
   Exemplos de Código (Pre & Code)
-------------------------------------------- */
.code-example {
  margin: 24px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.code-title {
  background-color: var(--bg-primary);
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-title::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #ef4444;
  box-shadow: 12px 0 0 #f59e0b, 24px 0 0 #10b981;
}

pre {
  background-color: #050811;
  padding: 20px;
  overflow-x: auto;
  margin: 0;
}

code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #cbd5e1;
}

/* -----------------------------------------
   Pipeline de Grid
-------------------------------------------- */
.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.pipeline-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
  border-top: 3px solid var(--color-cyan);
  transition: transform var(--transition-fast);
}

.pipeline-card:hover {
  transform: translateY(-2px);
  border-top-color: var(--color-indigo);
}

.pipeline-card:nth-child(even) {
  border-top-color: var(--color-emerald);
}

.pipeline-card .step-num {
  font-size: 12px;
  font-weight: 700;
  background-color: var(--bg-card);
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 12px;
}

.pipeline-card h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.pipeline-card p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Layout de Duas Colunas */
.grid-2col {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
  margin-top: 24px;
}

.diagram-mini-container {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: center;
}

.mini-svg {
  width: 100%;
  max-width: 340px;
  height: auto;
  margin: 0 auto;
}

/* -----------------------------------------
   Árvores de Diretórios (Code Tree)
-------------------------------------------- */
.code-tree {
  background-color: #050811;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.tree-root {
  font-weight: 700;
  color: #f8fafc;
}

.tree-branch {
  margin-left: 16px;
  border-left: 1px dashed var(--text-muted);
  padding-left: 16px;
  margin-top: 8px;
  margin-bottom: 8px;
}

.tree-leaf {
  margin-left: 16px;
  border-left: 1px dashed var(--text-muted);
  padding-left: 16px;
  margin-top: 4px;
}

.tree-node {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 3px;
  margin-bottom: 2px;
}

.tree-node.class {
  background-color: var(--color-indigo-glow);
  color: #a5b4fc;
}

.tree-node.method {
  background-color: var(--color-cyan-glow);
  color: #bae6fd;
}

.tree-node.function {
  background-color: rgba(139, 92, 246, 0.12);
  color: #ddd6fe;
}

/* -----------------------------------------
   Tabelas Comparativas
-------------------------------------------- */
.table-responsive {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.compare-table th {
  background-color: var(--bg-primary);
  color: #fff;
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.compare-table td {
  padding: 14px 18px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:nth-child(even) {
  background-color: rgba(30, 41, 59, 0.2);
}

/* -----------------------------------------
   Tags de Linguagem
-------------------------------------------- */
.supported-langs {
  margin-top: 32px;
}

.lang-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
}

/* -----------------------------------------
   Busca Híbrida (Arms)
-------------------------------------------- */
.search-arms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 30px 0;
}

.arm-card {
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
}

.arm-card.vector {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(8, 13, 26, 0) 100%);
  border-left: 4px solid var(--color-indigo);
}

.arm-card.lexical {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(8, 13, 26, 0) 100%);
  border-left: 4px solid var(--color-emerald);
}

.arm-card h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
}

.arm-card p {
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.arm-card p:last-child {
  margin-bottom: 0;
  color: var(--text-muted);
}

.formula-box {
  background-color: #050811;
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  text-align: center;
}

.formula {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--color-cyan);
  margin-bottom: 10px;
  font-weight: bold;
}

.formula-box p {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* -----------------------------------------
   Grid de Ferramentas (Tools)
-------------------------------------------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.tool-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.tool-card:hover {
  transform: translateY(-2px);
  border-color: rgba(14, 165, 233, 0.4);
}

.tool-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.tool-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-cyan);
}

.tool-type {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 3px;
}

.tool-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.tool-args {
  font-size: 11px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
}

.tool-args code {
  color: var(--text-secondary);
}

/* -----------------------------------------
   Local-First Box & CTA
-------------------------------------------- */
.local-first-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(8, 13, 26, 0.1) 100%);
  border: 1px solid var(--color-emerald);
  padding: 30px;
  border-radius: var(--radius-md);
  display: flex;
  gap: 24px;
  margin-bottom: 40px;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.05);
}

.shield-icon {
  font-size: 40px;
  line-height: 1;
}

.local-first-text h3 {
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.local-first-text p {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.local-first-text p:last-child {
  margin-bottom: 0;
}

.cta-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: var(--radius-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-indigo), var(--color-cyan));
}

.cta-box h3 {
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: 12px;
  margin-top: 0;
}

.cta-box p {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 600px;
  margin: 0 auto 24px;
}

.cta-actions {
  display: flex;
  justify-content: center;
}

/* -----------------------------------------
   Cadeia de Resolução do Índice
-------------------------------------------- */
.resolution-chain {
  list-style: none;
  counter-reset: resolution-step;
  margin: 24px 0 30px;
  padding: 0;
}

.resolution-chain li {
  counter-increment: resolution-step;
  position: relative;
  padding: 16px 16px 16px 52px;
  margin-bottom: 12px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-secondary);
}

.resolution-chain li::before {
  content: counter(resolution-step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  background-color: var(--color-indigo);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.resolution-chain li strong {
  color: var(--text-primary);
}

/* -----------------------------------------
   Bloco de Instalação Rápida
-------------------------------------------- */
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 24px 0 36px;
}

.install-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
}

.install-card h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 12px;
}

.install-card p,
.install-card li {
  font-size: 13px;
  color: var(--text-secondary);
}

.install-card ul {
  margin-top: 8px;
  padding-left: 18px;
}

.install-card pre {
  background-color: #050811;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: #a5f3fc;
}

.install-card code {
  font-family: var(--font-mono);
  font-size: 12px;
}

/* -----------------------------------------
   Footer
-------------------------------------------- */
.main-footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.main-footer p {
  margin-bottom: 6px;
}

.footer-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* -----------------------------------------
   Árvore de código (labels acessíveis)
-------------------------------------------- */
.tree-kind {
  display: inline-block;
  min-width: 4.5rem;
  margin-right: 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* -----------------------------------------
   Voltar ao topo
-------------------------------------------- */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  min-width: 44px;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-md);
}

.back-to-top:hover {
  border-color: rgba(99, 102, 241, 0.45);
}

/* -----------------------------------------
   Responsividade (Media Queries)
-------------------------------------------- */

/* Viewports Médios (Tablets) */
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .nav-panel {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 88vw);
    padding: 80px 20px 24px;
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 110;
    overflow-y: auto;
  }

  .nav-panel.is-open {
    transform: translateX(0);
  }

  .nav-panel-label {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-links a {
    width: 100%;
    padding: 12px 14px;
  }

  body.nav-open::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(8, 13, 26, 0.72);
    z-index: 105;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero .subtitle {
    font-size: 1.15rem;
  }

  .grid-2col {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .card-section {
    padding: 28px;
  }

  .card-section--flat {
    padding-inline: 0;
  }
}

/* Viewports Pequenos (Celulares) */
@media (max-width: 480px) {
  .hero {
    padding: 80px 0 60px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    padding: 0 20px;
  }

  .card-section {
    padding: 20px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .local-first-box {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }
}