/* ==========================================================================
   PDFaz - Estilos Otimizados para Landing Pages de SEO Programático
   Performance Lighthouse 95+ • Responsivo • Modo Claro e Escuro
   ========================================================================== */

:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --primary-border: #BFDBFE;
  --success: #059669;
  --success-light: #ECFDF5;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-inverse: #FFFFFF;
  --bg-app: #F8FAFC;
  --bg-header: rgba(255, 255, 255, 0.92);
  --bg-card: #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --bg-muted: #F1F5F9;
  --border-color: #E2E8F0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="dark"],
:root[data-theme="dark"] {
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --bg-app: #0B0F19;
  --bg-header: rgba(15, 23, 42, 0.92);
  --bg-card: #131B2E;
  --bg-card-hover: #1E293B;
  --bg-muted: #1E293B;
  --border-color: #1E293B;
  --primary-light: rgba(37, 99, 235, 0.15);
  --primary-border: rgba(37, 99, 235, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.brand-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  line-height: 1.1;
}

.brand-title span {
  color: var(--primary);
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-header-cta {
  background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
  color: #FFFFFF !important;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  transition: all var(--transition-fast);
}

.btn-header-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.45);
}

.btn-theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--radius-md);
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-theme-toggle:hover {
  background: var(--bg-card-hover);
}

/* Hero Section */
.landing-hero {
  padding: 48px 20px 40px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-title span {
  color: var(--primary);
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn-hero-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
  color: #FFFFFF !important;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: all var(--transition-fast);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-hero-secondary {
  background: var(--bg-card);
  color: var(--text-main) !important;
  border: 1px solid var(--border-color);
  font-size: 1rem;
  font-weight: 600;
  padding: 13px 22px;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.btn-hero-secondary:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.hero-guarantees {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hero-guarantee-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.hero-guarantee-item svg {
  color: var(--success);
}

/* Document Interactive Preview Mockup */
.preview-section {
  max-width: 980px;
  margin: 0 auto 56px;
  padding: 0 20px;
}

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

.preview-header {
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-dots {
  display: flex;
  gap: 6px;
}

.preview-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #CBD5E1;
}

.preview-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.preview-content {
  padding: 32px;
}

.preview-doc-box {
  border: 1px dashed var(--border-color);
  background: var(--bg-app);
  border-radius: var(--radius-md);
  padding: 24px;
}

.preview-doc-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.preview-doc-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.preview-features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.preview-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-main);
  background: var(--bg-card);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* Benefícios Grid */
.benefits-section {
  max-width: 1100px;
  margin: 0 auto 56px;
  padding: 0 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 36px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.benefit-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.benefit-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.benefit-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.benefit-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Guia Passo a Passo */
.steps-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 56px 20px;
  margin-bottom: 56px;
}

.steps-container {
  max-width: 1000px;
  margin: 0 auto;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 36px;
}

.step-card {
  position: relative;
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #FFFFFF;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-section {
  max-width: 820px;
  margin: 0 auto 56px;
  padding: 0 20px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 18px 20px;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.1rem;
  transition: transform var(--transition-normal);
  color: var(--primary);
  flex-shrink: 0;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: none;
}

.faq-item.is-open .faq-answer {
  display: block;
}

/* Hub de Documentos Relacionados */
.related-hub-section {
  max-width: 1100px;
  margin: 0 auto 56px;
  padding: 0 20px;
}

.related-tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.related-tag-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.related-tag-link:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
  transform: translateY(-1px);
}

/* CTA Footer Banner */
.cta-banner {
  background: linear-gradient(135deg, #1E40AF 0%, #1D4ED8 50%, #2563EB 100%);
  color: #FFFFFF;
  text-align: center;
  padding: 48px 20px;
  border-radius: var(--radius-lg);
  max-width: 1060px;
  margin: 0 auto 56px;
  box-shadow: var(--shadow-lg);
}

.cta-banner h2 {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 24px;
  opacity: 0.92;
}

.btn-cta-banner {
  background: #FFFFFF;
  color: #1D4ED8 !important;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
}

.btn-cta-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 36px 20px 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
}

/* Responsividade Mobile */
@media (max-width: 768px) {
  .header-inner {
    padding: 10px 14px;
  }
  .brand-subtitle {
    display: none;
  }
  .hero-title {
    font-size: 1.75rem;
  }
  .hero-description {
    font-size: 0.95rem;
  }
  .preview-content {
    padding: 16px;
  }
  .benefits-grid, .steps-grid {
    grid-template-columns: 1fr;
  }
}