/* ═══════════════════════════════════════════════════════════════
   AGRORURAL CONTABILIDADE - DESIGN SYSTEM
   ═══════════════════════════════════════════════════════════════ */

/* Reset e Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Paleta de Cores Exclusiva */
  --primary-dark: #1a5f3f;
  --primary: #2d7a53;
  --primary-light: #4CAF50;
  --secondary: #66BB6A;
  --accent: #81C784;
  
  --background: #ffffff;
  --background-light: #f8fdf9;
  --background-alt: #e8f5e9;
  
  --text-primary: #1a2d23;
  --text-secondary: #3d5647;
  --text-muted: #6b7f72;
  
  --border-color: #c8e6c9;
  --shadow-sm: 0 2px 8px rgba(26, 95, 63, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 95, 63, 0.12);
  --shadow-lg: 0 8px 32px rgba(26, 95, 63, 0.16);
  
  /* Typography Scale */
  --font-system: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  
  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Typography */
body {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: var(--space-sm);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background-color: var(--background-light);
  background-image: url('../images/pattern.svg');
  background-size: 400px 400px;
  background-position: center;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
}

.site-logo img {
  height: 50px;
  width: auto;
}

.main-nav ul {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.main-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.main-nav a:hover {
  color: var(--primary);
  background-color: var(--background-alt);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary);
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--background-light) 0%, var(--background-alt) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background-image: url('../images/hero.svg');
  background-size: cover;
  background-position: center;
  opacity: 0.5;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

/* Content Blocks */
.content-block {
  margin-bottom: var(--space-xl);
}

.content-header {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.content-header h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-sm);
}

.content-header p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.card {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

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

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
  color: white;
}

.card h3 {
  margin-bottom: var(--space-sm);
  color: var(--primary-dark);
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Process Steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  position: relative;
}

.process-step {
  text-align: center;
  padding: var(--space-lg);
  position: relative;
}

.step-number {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--space-md);
}

.process-step h4 {
  margin-bottom: var(--space-sm);
  color: var(--primary-dark);
}

/* Tables */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-xl) 0;
  background: var(--background);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table thead {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table tbody tr:hover {
  background-color: var(--background-alt);
}

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

/* Info Boxes */
.info-box {
  background: var(--background-light);
  border-left: 4px solid var(--primary-light);
  padding: var(--space-lg);
  border-radius: 8px;
  margin: var(--space-lg) 0;
}

.info-box.warning {
  background: #fff8e1;
  border-left-color: #ffa726;
}

.info-box.success {
  background: var(--background-alt);
  border-left-color: var(--secondary);
}

.info-box h4 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  color: var(--primary-dark);
}

/* FAQ Accordion */
.faq-container {
  max-width: 900px;
  margin: var(--space-xl) auto;
}

.faq-item {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: var(--space-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-md);
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary-light);
  transition: transform var(--transition-base);
}

.faq-question.active::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-answer-content {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* Contact Form */
.contact-form {
  max-width: 700px;
  margin: var(--space-xl) auto;
  background: var(--background);
  padding: var(--space-xl);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-sm);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-family: var(--font-system);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background-color: var(--background);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: #d32f2f;
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.form-group.error input,
.form-group.error textarea,
.form-group.error select {
  border-color: #d32f2f;
}

.form-group.error .form-error {
  display: block;
}

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-base);
  text-align: center;
}

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

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-success {
  background: var(--background-alt);
  border: 2px solid var(--secondary);
  border-radius: 8px;
  padding: var(--space-lg);
  text-align: center;
  display: none;
}

.form-success.show {
  display: block;
  animation: slideIn 0.4s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.stat-box {
  text-align: center;
  padding: var(--space-lg);
  background: var(--background);
  border-radius: 12px;
  border: 2px solid var(--border-color);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

/* Footer */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-xl) 0 var(--space-md);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.footer-section p,
.footer-section li {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: var(--space-xs);
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  margin-top: var(--space-lg);
  font-size: 0.85rem;
  opacity: 0.7;
  text-align: center;
}

.footer-legal {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-sm);
  flex-wrap: wrap;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.35rem; }
  
  .hero {
    min-height: 60vh;
  }
  
  .hero::before {
    width: 100%;
    opacity: 0.2;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-md);
    padding: var(--space-md);
  }
  
  .main-nav.active {
    display: block;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .cards-grid,
  .process-steps {
    grid-template-columns: 1fr;
  }
  
  .comparison-table {
    font-size: 0.85rem;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: var(--space-sm);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .footer-legal {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }
}

/* Print Styles */
@media print {
  .site-header,
  .mobile-menu-toggle,
  .contact-form,
  .btn {
    display: none;
  }
  
  .section {
    page-break-inside: avoid;
  }
}