/* ============================================================
   style.css — Estilos da Colinha Frontend
   
   ESTRUTURA:
   1. Reset & Variáveis
   2. Base
   3. Utilitários
   4. Header
   5. Hero
   6. Seções de Conteúdo
   7. Cards Grid
   8. Accordion
   9. Tabs
   10. CSS Grid de Grupos
   11. Componentes de Página
   12. Footer
   13. Responsivo
   ============================================================ */


/* ============================================================
   1. RESET & VARIÁVEIS CSS
   ============================================================ */

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

/* Variáveis CSS (Custom Properties) */
:root {
  /* Cores */
  --color-bg:        #0f0f13;
  --color-surface:   #16161d;
  --color-card:      #1e1e28;
  --color-border:    #2e2e3e;
  --color-text:      #e4e4f0;
  --color-muted:     #7a7a9a;

  /* Acentos */
  --accent-orange:   #ff6b35;
  --accent-purple:   #8b5cf6;
  --accent-cyan:     #22d3ee;
  --accent-green:    #10b981;
  --accent-yellow:   #fbbf24;
  --accent-pink:     #f472b6;

  /* Tipografia */
  --font-sans:   'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:   'Courier New', Courier, monospace;

  /* Espaçamentos */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  5rem;

  /* Bordas */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  /* Sombras */
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.5);
}


/* ============================================================
   2. BASE
   ============================================================ */

html {
  scroll-behavior: smooth; /* rola suavemente ao clicar nos links de âncora */
  font-size: 16px;
}

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

/* Links */
a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-orange);
}

/* Código inline */
code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(139, 92, 246, 0.25);
}

/* Negrito */
strong {
  color: #fff;
  font-weight: 600;
}

/* Itálico */
em {
  color: var(--accent-yellow);
  font-style: italic;
}

/* Teclado */
kbd {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.5em;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--accent-yellow);
}


/* ============================================================
   3. UTILITÁRIOS
   ============================================================ */

/* Container — centraliza e limita a largura */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}


/* ============================================================
   4. HEADER
   ============================================================ */

.site-header {
  position: sticky;          /* ← STICKY HEADER: fica no topo ao rolar */
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 19, 0.92);
  backdrop-filter: blur(12px);   /* desfoque de vidro */
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.header-inner {
  display: flex;              /* flexbox: logo e nav lado a lado */
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.logo-icon {
  font-size: 1.4rem;
}

.logo-text strong {
  color: var(--accent-orange);
}

/* Navegação */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.main-nav a:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.06);
}


/* ============================================================
   5. HERO
   ============================================================ */

.hero {
  /* Fundo com gradiente + grade decorativa */
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139,92,246,0.25), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(255,107,53,0.15), transparent),
    var(--color-surface);
  padding: var(--space-3xl) 0;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: flex;
  flex-direction: column;   /* empilha verticalmente */
  align-items: center;
  gap: var(--space-lg);
}

/* Eyebrow — pequena linha acima do título */
.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;    /* pill shape */
}

/* Título principal */
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

/* Texto em destaque */
.highlight {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Subtítulo */
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 540px;
  line-height: 1.7;
}

.hero-subtitle strong {
  color: var(--accent-yellow);
}

/* Botões — CTA */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  text-decoration: none;
  border: none;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-orange), #e55a28);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}


/* ============================================================
   6. SEÇÕES DE CONTEÚDO
   ============================================================ */

.site-main {
  padding-bottom: var(--space-3xl);
}

.content-section {
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--color-border);
}

/* Seções alternadas com fundo levemente diferente */
.section-alt {
  background: var(--color-surface);
}

/* Título de seção */
.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.section-icon {
  font-size: 1.5rem;
}

/* BREADCRUMB */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: var(--space-lg);
}

.breadcrumb a {
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

.sep {
  color: var(--color-border);
}


/* ============================================================
   7. CARDS GRID
   ============================================================ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

/* CARD — componente de artigo */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-purple);
}

.card-header {
  background: rgba(139, 92, 246, 0.08);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.card-header code {
  font-size: 0.9rem;
  background: none;
  border: none;
  padding: 0;
  color: var(--accent-cyan);
}

.card-body {
  padding: var(--space-md);
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
}


/* ============================================================
   8. ACCORDION
   ============================================================ */

.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.accordion-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s;
}

.accordion-item[open] {
  border-color: var(--accent-purple);
}

.accordion-trigger {
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.92rem;
  user-select: none;
  transition: background 0.15s;
}

.accordion-trigger:hover {
  background: rgba(255,255,255,0.03);
}

/* Remove a seta padrão do details/summary */
.accordion-trigger::-webkit-details-marker { display: none; }

/* Seta customizada via pseudo-elemento */
.accordion-trigger::before {
  content: '▶';
  color: var(--accent-purple);
  font-size: 0.7rem;
  transition: transform 0.2s;
}

details[open] .accordion-trigger::before {
  transform: rotate(90deg);
}

.accordion-desc {
  color: var(--color-muted);
  font-size: 0.85rem;
  flex: 1;
}

.accordion-content {
  padding: 0 var(--space-lg) var(--space-md);
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.6;
  border-top: 1px solid var(--color-border);
}

.accordion-content p {
  padding-top: var(--space-md);
}


/* ============================================================
   9. TABS
   ============================================================ */

.tabs {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* Lista de abas */
.tab-list {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-md) var(--space-xl);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
  font-family: inherit;
}

.tab-btn:hover {
  color: var(--color-text);
}

/* Aba ativa */
.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

/* Painéis de conteúdo */
.tab-panel {
  display: none;           /* esconde os painéis por padrão */
  padding: var(--space-xl);
}

.tab-panel.active {
  display: block;          /* mostra apenas o painel ativo */
}

/* Lista de tags nas tabs */
.tag-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.tag-list li {
  padding: var(--space-sm) var(--space-md);
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.5;
  border-left: 2px solid var(--color-border);
  transition: border-color 0.2s, background 0.2s;
}

.tag-list li:hover {
  border-left-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.04);
}


/* ============================================================
   10. CSS GRID DE GRUPOS
   ============================================================ */

.css-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.css-group {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: border-color 0.2s;
}

.css-group:hover {
  border-color: var(--accent-cyan);
}

.css-group-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}


/* ============================================================
   11. COMPONENTES DE PÁGINA
   ============================================================ */

.components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-md);
}

.component-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.component-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-orange);
}

/* Card de destaque */
.highlight-card {
  border-color: var(--accent-orange);
  background: linear-gradient(135deg, rgba(255,107,53,0.08), var(--color-card));
  grid-column: span 1;
}

.comp-icon {
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
}

.component-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.component-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.comp-badge {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  background: rgba(255,107,53,0.15);
  color: var(--accent-orange);
  padding: 0.2em 0.6em;
  border-radius: 999px;
  border: 1px solid rgba(255,107,53,0.3);
}


/* ============================================================
   12. FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

.site-footer p {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.footer-tip {
  font-size: 0.85rem !important;
  color: var(--accent-yellow) !important;
}


/* ============================================================
   13. RESPONSIVO — Media Queries
   ============================================================ */

/* Telas médias (tablets) */
@media (max-width: 768px) {
  .main-nav {
    display: none; /* simplificado para mobile */
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

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

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

/* Telas pequenas (celular) */
@media (max-width: 480px) {
  .components-grid {
    grid-template-columns: 1fr;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}


/* ============================================================
   COMPONENTES VISUAIS — Estilos dos exemplos interativos
   ============================================================ */

/* Descrição da seção */
.section-desc {
  color: var(--color-muted);
  margin-bottom: var(--space-2xl);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Showcase wrapper — cada componente */
.comp-showcase {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-xl);
  align-items: start;
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
}

.comp-showcase:last-child {
  border-bottom: none;
}

/* Label — lado esquerdo com descrição */
.comp-label {
  position: sticky;
  top: 80px;
}

.comp-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(139,92,246,0.15);
  color: #a78bfa;
  border: 1px solid rgba(139,92,246,0.3);
  padding: 0.2em 0.6em;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.comp-label h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.comp-label p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* Preview — lado direito com o componente real */
.comp-preview {
  background: #111118;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  overflow: hidden;
}

/* ---- NAVBAR ---- */
.ex-navbar {
  background: #1a1a2e;
  border: 1px solid #2e2e4e;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ex-navbar-logo {
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
}

.ex-navbar-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
}

.ex-navbar-links a {
  color: #aaa;
  font-size: 0.85rem;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.ex-navbar-links a:hover { color: #fff; background: rgba(255,255,255,0.07); }

.ex-navbar-cta {
  background: var(--accent-orange) !important;
  color: #fff !important;
  border-radius: 6px !important;
}

/* ---- HERO ---- */
.ex-hero {
  background: linear-gradient(135deg, #1a0533 0%, #0f1729 60%, #0a2a1a 100%);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  text-align: center;
  border: 1px solid #2e2e4e;
}

.ex-hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a78bfa;
  background: rgba(139,92,246,0.15);
  border: 1px solid rgba(139,92,246,0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.ex-hero-title {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.ex-hero-title span {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ex-hero-sub {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.ex-hero-btns {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- BOTÕES COMPARTILHADOS ---- */
.ex-btn-primary {
  background: var(--accent-orange);
  color: #fff;
  border: none;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  font-family: inherit;
}

.ex-btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

.ex-btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s;
  font-family: inherit;
}

.ex-btn-ghost:hover { border-color: var(--accent-purple); color: var(--accent-purple); }

/* ---- CARDS GRID ---- */
.ex-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.ex-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.ex-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.ex-card-img {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.ex-card-body {
  padding: 0.75rem;
}

.ex-card-body h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.ex-card-body p {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.ex-card-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  font-weight: 600;
}

/* ---- BANNER ---- */
.ex-banner {
  position: relative;
  background: linear-gradient(135deg, #1a1040, #2d1b69, #0d2137);
  border-radius: var(--radius-md);
  padding: 2rem;
  overflow: hidden;
  min-height: 140px;
  display: flex;
  align-items: center;
  border: 1px solid #3d2b7a;
}

/* Overlay escuro por cima */
.ex-banner-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 1;
}

.ex-banner-content {
  position: relative;
  z-index: 2; /* fica acima do overlay */
}

.ex-banner-tag {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--accent-orange);
  color: #fff;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.ex-banner-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.3rem;
}

.ex-banner-content p {
  font-size: 0.85rem;
  color: #ccc;
  margin-bottom: 1rem;
}

/* ---- CAROUSEL ---- */
.ex-carousel-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: visible;
}

/* O container que esconde os slides fora da área */
.ex-carousel-track-container {
  overflow: hidden;
  border-radius: var(--radius-md);
}

/* Track: todos slides em linha horizontal */
.ex-carousel-track {
  display: flex;
  transition: transform 0.4s ease;
}

.ex-slide {
  min-width: 100%;
  height: 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 2rem;
}

.ex-slide p {
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  margin: 0;
}

/* Botões prev/next */
.ex-carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 10;
  font-family: inherit;
}

.ex-carousel-btn:hover { background: rgba(255,255,255,0.3); }
.ex-carousel-prev { left: -18px; }
.ex-carousel-next { right: -18px; }

/* Bolinhas indicadoras */
.ex-carousel-dots {
  display: flex;
  gap: 0.4rem;
  justify-content: center;
  margin-top: 0.75rem;
}

.ex-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.ex-dot.active {
  background: var(--accent-orange);
  transform: scale(1.3);
}

/* ---- MODAL + OVERLAY ---- */
.ex-modal-trigger-area {
  text-align: center;
}

.ex-trigger-hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

/* Overlay — cobre a tela inteira, semitransparente */
.ex-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 200;
  backdrop-filter: blur(4px);
}

.ex-overlay.active { display: block; }

/* Modal — centralizado na tela */
.ex-modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 201; /* acima do overlay */
  background: #1e1e2e;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: min(440px, 90vw);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  animation: modalSlideIn 0.2s ease;
}

.ex-modal.active { display: block; }

@keyframes modalSlideIn {
  from { opacity: 0; transform: translate(-50%, -48%); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

.ex-modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ex-modal-header h4 { font-size: 1rem; font-weight: 700; }

.ex-modal-close {
  background: none;
  border: none;
  color: var(--color-muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  font-family: inherit;
}

.ex-modal-close:hover { color: #fff; background: rgba(255,255,255,0.1); }

.ex-modal-body {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ex-modal-body p { font-size: 0.9rem; color: var(--color-muted); }

.ex-input {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.9rem;
  color: var(--color-text);
  font-size: 0.9rem;
  width: 100%;
  font-family: inherit;
  transition: border-color 0.2s;
}

.ex-input:focus { outline: none; border-color: var(--accent-purple); }

.ex-modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* ---- TOAST ---- */
.ex-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 300;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  box-shadow: var(--shadow-lg);
  display: none;
  align-items: center;
  gap: 0.6rem;
  min-width: 220px;
  animation: toastSlide 0.3s ease;
  font-family: var(--font-sans);
}

.ex-toast.visible { display: flex; }

@keyframes toastSlide {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- SKELETON ---- */
.ex-skeleton-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

/* Animação de shimmer (brilho percorrendo o elemento) */
@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    #1e1e28 25%,
    #2a2a38 50%,
    #1e1e28 75%
  );
  background-size: 600px 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: var(--radius-sm);
}

.skeleton-img   { width: 100px; height: 100px; border-radius: var(--radius-md); flex-shrink: 0; }
.skeleton-title { height: 18px; width: 70%; margin-bottom: 0.5rem; border-radius: 4px; }
.skeleton-text  { height: 12px; width: 90%; margin-bottom: 0.4rem; border-radius: 4px; }
.skeleton-text.short { width: 60%; }
.skeleton-btn   { height: 30px; width: 110px; margin-top: 0.5rem; border-radius: var(--radius-md); }

.ex-skeleton-info { flex: 1; padding-top: 0.25rem; }

/* ---- BREADCRUMB ---- */
.ex-breadcrumb-wrap {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.ex-breadcrumb {
  list-style: none;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}

/* Separador via CSS puro, sem HTML extra */
.ex-breadcrumb li + li::before {
  content: '›';
  color: var(--color-border);
  margin: 0 0.4rem;
}

.ex-breadcrumb li { font-size: 0.85rem; }

.ex-breadcrumb a {
  color: var(--color-muted);
  transition: color 0.2s;
}

.ex-breadcrumb a:hover { color: var(--accent-cyan); }

.ex-breadcrumb [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

/* ---- SIDEBAR LAYOUT ---- */
.ex-layout {
  display: grid;
  grid-template-columns: 160px 1fr; /* sidebar estreita + main largo */
  gap: 1rem;
  min-height: 140px;
}

.ex-sidebar {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.ex-sidebar-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-bottom: 0.6rem;
  font-weight: 700;
}

.ex-sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.ex-sidebar-list li {
  font-size: 0.82rem;
  padding: 0.35rem 0.5rem;
  border-radius: 5px;
  cursor: pointer;
  color: var(--color-muted);
  transition: background 0.15s, color 0.15s;
}

.ex-sidebar-list li:hover { background: rgba(255,255,255,0.05); color: var(--color-text); }

.ex-sidebar-list li.active {
  background: rgba(34,211,238,0.1);
  color: var(--accent-cyan);
  font-weight: 600;
}

.ex-main-content {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.ex-main-content h4 { font-size: 0.95rem; margin-bottom: 0.5rem; }
.ex-main-content p  { font-size: 0.82rem; color: var(--color-muted); }

/* ---- SKYSCRAPER ---- */
.ex-skyscraper-demo {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.ex-page-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.ex-page-content p {
  font-size: 0.82rem;
  color: var(--color-muted);
  background: var(--color-card);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  line-height: 1.5;
}

/* O banner corroceu — alto e estreito */
.ex-skyscraper {
  width: 120px;
  min-height: 240px;
  background: linear-gradient(180deg, #1a0533, #2d1b69, #0d2137);
  border: 1px solid #5b21b6;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1rem 0.5rem;
  text-align: center;
  flex-shrink: 0;
}

.ex-sky-label {
  font-size: 0.6rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.ex-sky-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.ex-sky-sub {
  font-size: 0.7rem;
  color: #888;
  font-family: var(--font-mono);
}

.ex-sky-btn {
  background: var(--accent-purple);
  color: #fff;
  border: none;
  padding: 0.4rem 0.6rem;
  border-radius: 5px;
  font-size: 0.72rem;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  margin-top: 0.25rem;
  transition: opacity 0.2s;
}

.ex-sky-btn:hover { opacity: 0.8; }

/* ---- ABOVE THE FOLD ---- */
.ex-fold-demo {
  display: flex;
  justify-content: center;
}

.ex-fold-screen {
  width: 260px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: 0.8rem;
}

.ex-fold-above {
  background: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(34,211,238,0.1));
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--color-text);
  font-weight: 600;
  min-height: 100px;
  align-items: center;
  justify-content: center;
}

.ex-fold-above small {
  color: var(--color-muted);
  font-weight: 400;
  font-size: 0.72rem;
}

.ex-fold-line {
  background: var(--accent-orange);
  color: #fff;
  text-align: center;
  padding: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.ex-fold-below {
  background: rgba(255,255,255,0.02);
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--color-muted);
  min-height: 80px;
  align-items: center;
  justify-content: center;
}

.ex-fold-below small {
  font-size: 0.72rem;
}

/* ---- RESPONSIVO DOS COMPONENTES ---- */
@media (max-width: 768px) {
  .comp-showcase {
    grid-template-columns: 1fr;
  }

  .comp-label {
    position: static;
  }

  .ex-cards-grid {
    grid-template-columns: 1fr;
  }

  .ex-layout {
    grid-template-columns: 1fr;
  }

  .ex-carousel-prev { left: 4px; }
  .ex-carousel-next { right: 4px; }
}

/* ============================================================
   EXERCÍCIOS — Novos estilos (badges, header do card, progresso)
   ============================================================ */

/* Grid de exercícios: 1 coluna por padrão, 2 em telas médias */
.exercise-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .exercise-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Card do exercício */
.exercise-card {
  background: var(--color-card);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.exercise-card:hover {
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-sm);
}

/* Linha de topo do card: badge + número */
.exercise-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

/* Badge colorido por categoria */
.exercise-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 999px;
}

.badge-html {
  background: rgba(255, 107, 53, 0.15);
  color: var(--accent-orange);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.badge-css {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.badge-js {
  background: rgba(251, 191, 36, 0.15);
  color: var(--accent-yellow);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

/* Número do exercício */
.exercise-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-muted);
  font-family: var(--font-mono);
}

/* Título do exercício */
.exercise-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

/* Texto do exercício */
.exercise-card > p {
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* Botão mostrar/ocultar resposta */
.btn-toggle {
  margin-top: 1rem;
  padding: 7px 16px;
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
}

.btn-toggle:hover {
  background: rgba(34, 211, 238, 0.1);
}

/* Área de resposta — oculta por padrão */
.exercise-answer {
  display: none;
  margin-top: 1rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.exercise-answer.active {
  display: block;
}

/* Abas HTML / CSS / JS dentro do exercício */
.exercise-answer .tabs {
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}

.exercise-answer .tabs .tab {
  background: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-mono);
  margin-right: 6px;
  margin-bottom: 10px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.exercise-answer .tabs .tab:hover {
  border-color: var(--accent-purple);
  color: var(--color-text);
}

.exercise-answer .tabs .tab.active {
  background: var(--accent-cyan);
  color: #0f0f13;
  border-color: var(--accent-cyan);
}

/* Bloco de código */
.code-block {
  display: none;
  background: #12121a;
  border: 1px solid var(--color-border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  font-family: var(--font-mono);
  line-height: 1.7;
  color: #c4b5fd;
  overflow-x: auto;
  white-space: pre;
}

.code-block.active {
  display: block;
}

/* Barra de progresso */
.progress-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.progress-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.progress-bar-track {
  width: 220px;
  height: 8px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 999px;
  transition: width 0.5s ease;
}

.progress-count {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}
/* ---- BOTÃO COPIAR ---- */

/* Linha que agrupa as abas + botão copiar lado a lado */
.tabs-copy-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

/* As abas dentro do novo wrapper não precisam de margin-bottom própria */
.tabs-copy-row .tabs {
  margin-bottom: 0;
  flex: 1;
}

/* Botão copiar */
.copy-btn {
  padding: 4px 14px;
  background: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
  border-color: var(--accent-cyan);
}

/* Estado "Copiado!" */
.copy-btn.copied {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border-color: var(--accent-green);
}