/* ============================================
   MAC ASSESSORIA CONTÁBIL - DESIGN SYSTEM
   ============================================ */

/* === RESET E FUNDAMENTOS === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Paleta de cores profissional */
  --primary-900: #0c2d48;
  --primary-800: #1a4d6f;
  --primary-700: #2563a0;
  --primary-600: #0ea5e9;
  --primary-500: #38bdf8;
  --primary-400: #7dd3fc;
  
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  --accent-blue: #0ea5e9;
  --accent-cyan: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Tipografia */
  --font-system: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Courier New', monospace;
  
  /* Espaçamentos */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  
  /* Transições */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  line-height: 1.6;
  color: var(--neutral-800);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === TIPOGRAFIA === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-900);
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--neutral-700);
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-700);
}

strong {
  font-weight: 600;
  color: var(--neutral-900);
}

/* === LAYOUT CONTAINERS === */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 900px;
}

.container-wide {
  max-width: 1400px;
}

/* === HEADER === */
.site-header {
  background-color: white;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--neutral-200);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo img {
  height: 45px;
  width: auto;
}

.nav-menu {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--neutral-700);
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-600);
  transition: width var(--transition-base);
}

.nav-menu a:hover {
  color: var(--primary-700);
}

.nav-menu a:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--neutral-700);
  cursor: pointer;
}

/* === SECTIONS === */
section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-600);
  margin-bottom: var(--space-sm);
}

.section-description {
  font-size: 1.125rem;
  color: var(--neutral-600);
  max-width: 700px;
  margin: 0 auto;
}

/* === HERO SECTION === */
.hero {
  background: linear-gradient(135deg, var(--neutral-50) 0%, var(--primary-400) 0%, var(--neutral-100) 100%);
  position: relative;
  overflow: hidden;
  padding: var(--space-4xl) 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../images/hero.svg');
  background-size: cover;
  background-position: center;
  opacity: 0.95;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  color: var(--primary-900);
  margin-bottom: var(--space-lg);
}

.hero-lead {
  font-size: 1.25rem;
  color: var(--neutral-700);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

/* === CARDS === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: white;
  border-radius: 12px;
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-200);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-400);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
  color: white;
}

.card h3 {
  margin-bottom: var(--space-md);
  color: var(--primary-900);
}

.card p {
  color: var(--neutral-600);
  font-size: 0.95rem;
}

/* === ALERT BOXES === */
.alert-box {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-left: 4px solid var(--warning);
  padding: var(--space-lg);
  border-radius: 8px;
  margin: var(--space-xl) 0;
}

.alert-box.alert-info {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  border-left-color: var(--accent-blue);
}

.alert-box.alert-success {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  border-left-color: var(--success);
}

.alert-box h4 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--neutral-900);
  margin-bottom: var(--space-sm);
}

/* === TABLES === */
.responsive-table {
  width: 100%;
  overflow-x: auto;
  margin: var(--space-xl) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

thead {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
  color: white;
}

th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--neutral-200);
  color: var(--neutral-700);
}

tbody tr:hover {
  background-color: var(--neutral-50);
}

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

/* === FAQ === */
.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border-radius: 8px;
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--neutral-200);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--space-lg);
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--neutral-50);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--primary-600);
  transition: transform var(--transition-base);
}

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

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

.faq-item.active .faq-answer {
  max-height: 1000px;
}

.faq-answer-content {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--neutral-700);
  line-height: 1.7;
}

/* === FORM === */
.form-container {
  max-width: 700px;
  margin: 0 auto;
  background: white;
  padding: var(--space-2xl);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

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

label {
  display: block;
  font-weight: 600;
  color: var(--neutral-800);
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
}

input, textarea, select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--neutral-300);
  border-radius: 8px;
  font-family: var(--font-system);
  font-size: 1rem;
  transition: all var(--transition-base);
  background-color: white;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

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

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--neutral-200);
  color: var(--neutral-800);
}

.btn-secondary:hover {
  background: var(--neutral-300);
}

.form-message {
  padding: var(--space-md);
  border-radius: 8px;
  margin-bottom: var(--space-lg);
  display: none;
}

.form-message.success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
  display: block;
}

.form-message.error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
  display: block;
}

/* === FOOTER === */
.site-footer {
  background-color: var(--neutral-900);
  color: var(--neutral-400);
  padding: var(--space-3xl) 0 var(--space-lg);
  margin-top: var(--space-4xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
}

.footer-section p, .footer-section li {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--neutral-400);
}

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

.footer-section a {
  color: var(--neutral-400);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--primary-400);
}

.footer-legal {
  border-top: 1px solid var(--neutral-800);
  padding-top: var(--space-lg);
  font-size: 0.75rem;
  opacity: 0.5;
  line-height: 1.6;
}

.footer-legal p {
  margin-bottom: var(--space-sm);
  font-size: 0.75rem;
}

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  :root {
    --space-4xl: 3rem;
    --space-3xl: 2.5rem;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    gap: 0;
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu a {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--neutral-200);
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding: var(--space-3xl) 0;
  }
  
  section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .form-container {
    padding: var(--space-lg);
  }
  
  table {
    font-size: 0.875rem;
  }
  
  th, td {
    padding: var(--space-sm) var(--space-md);
  }
}