/* ============================================
   ADMWEB SOLUÇÕES CONTÁBEIS - Design System
   Conceito: Editorial Técnico Moderno
   ============================================ */

:root {
  /* === Paleta de Cores === */
  --color-primary: #1a4d2e;
  --color-primary-light: #2a6d4e;
  --color-primary-dark: #0a2d1e;
  
  --color-secondary: #4a7c59;
  --color-secondary-light: #6a9c79;
  --color-secondary-dark: #2a5c39;
  
  --color-accent: #d4af37;
  --color-accent-light: #e4bf57;
  --color-accent-dark: #b48f27;
  
  --color-neutral-50: #f8f9fa;
  --color-neutral-100: #e9ecef;
  --color-neutral-200: #dee2e6;
  --color-neutral-300: #ced4da;
  --color-neutral-400: #adb5bd;
  --color-neutral-500: #6c757d;
  --color-neutral-600: #495057;
  --color-neutral-700: #343a40;
  --color-neutral-800: #212529;
  --color-neutral-900: #0d0f11;
  
  --color-white: #ffffff;
  --color-black: #000000;
  
  --color-success: #2a6d4e;
  --color-warning: #d4af37;
  --color-error: #c1440e;
  --color-info: #4a7c59;
  
  /* === Tipografia === */
  --font-primary: 'SF Pro Display', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-secondary: 'SF Pro Text', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
  
  /* === Espaçamento === */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* === Border Radius === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* === Shadows === */
  --shadow-sm: 0 1px 3px rgba(26, 77, 46, 0.1);
  --shadow-md: 0 4px 12px rgba(26, 77, 46, 0.12);
  --shadow-lg: 0 8px 24px rgba(26, 77, 46, 0.15);
  --shadow-xl: 0 16px 48px rgba(26, 77, 46, 0.2);
  
  /* === Transitions === */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* === Z-index === */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-secondary);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-neutral-800);
  background-color: var(--color-white);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-base);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

h5 {
  font-size: 1.125rem;
  font-weight: 600;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--space-md);
  max-width: 70ch;
}

.text-large {
  font-size: 1.25rem;
  line-height: 1.6;
}

.text-small {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

.text-muted {
  color: var(--color-neutral-500);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 960px;
}

.container-wide {
  max-width: 1440px;
}

.section {
  padding: var(--space-3xl) 0;
}

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

.section-lg {
  padding: calc(var(--space-3xl) * 1.5) 0;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-neutral-100);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
}

.logo {
  height: 48px;
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.05);
}

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

.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  color: var(--color-neutral-700);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

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

.main-nav a:hover::after {
  width: 80%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-base);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-neutral-50) 0%, #e8f5e9 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: url('../images/hero.svg') no-repeat center/cover;
  opacity: 0.4;
  animation: heroFloat 20s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.02); }
}

.hero-content {
  position: relative;
  z-index: var(--z-base);
  max-width: 700px;
  animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(212, 175, 55, 0.1);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-description {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-neutral-600);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 1s ease-out 0.6s backwards;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
}

/* ============================================
   CARDS & CONTENT BLOCKS
   ============================================ */

.content-block {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-neutral-100);
}

.content-block:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.content-block-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--color-neutral-100);
}

.content-block-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* ============================================
   EDUCATIONAL COMPONENTS
   ============================================ */

.info-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-lg) 0;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

.info-table th {
  padding: var(--space-md);
  font-weight: 600;
  text-align: left;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.info-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-neutral-100);
}

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

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

.highlight-box {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(212, 175, 55, 0.05));
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
}

.highlight-box h4 {
  color: var(--color-accent-dark);
  margin-bottom: var(--space-sm);
}

.list-check {
  list-style: none;
  margin: var(--space-md) 0;
}

.list-check li {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-sm);
  position: relative;
}

.list-check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
  font-size: 1.2rem;
}

/* ============================================
   FAQ ACCORDION
   ============================================ */

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.faq-question {
  width: 100%;
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.faq-icon {
  font-size: 1.5rem;
  transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.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(--color-neutral-700);
  line-height: 1.7;
}

/* ============================================
   FORM STYLES
   ============================================ */

.contact-form {
  background: var(--color-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 700px;
  margin: 0 auto;
}

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

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-secondary);
  font-size: 1rem;
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  background: var(--color-white);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 77, 46, 0.1);
}

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

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

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

.form-group.error .form-input,
.form-group.error .form-textarea {
  border-color: var(--color-error);
}

.form-success {
  background: linear-gradient(135deg, rgba(42, 109, 78, 0.1), rgba(42, 109, 78, 0.05));
  border: 2px solid var(--color-success);
  color: var(--color-success);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  font-weight: 600;
  display: none;
}

.form-success.show {
  display: block;
  animation: slideDown 0.5s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-white);
  padding: var(--space-2xl) 0 var(--space-sm);
}

.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: var(--color-accent);
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  font-size: 0.95rem;
}

.footer-section a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  text-align: center;
  font-size: 0.75rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.5);
  opacity: 0.6;
}

.footer-bottom p {
  margin-bottom: var(--space-xs);
  max-width: 100%;
}

/* ============================================
   ANIMATIONS
   ============================================ */

.fade-in {
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-in-left {
  animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .hero::before {
    width: 80%;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }
  
  .main-nav.active {
    max-height: 500px;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: var(--space-md);
  }
  
  .main-nav a {
    display: block;
    padding: var(--space-md);
  }
  
  .hero {
    min-height: 70vh;
  }
  
  .hero::before {
    width: 100%;
    opacity: 0.2;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
  
  .header-content {
    padding: var(--space-sm);
  }
  
  .logo {
    height: 40px;
  }
  
  .content-block {
    padding: var(--space-lg);
  }
  
  .contact-form {
    padding: var(--space-lg);
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0 !important; }
.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); }

.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }